[PATCH v15 00/27] riscv control-flow integrity for usermode
by Deepak Gupta
Basics and overview
===================
Software with larger attack surfaces (e.g. network facing apps like databases,
browsers or apps relying on browser runtimes) suffer from memory corruption
issues which can be utilized by attackers to bend control flow of the program
to eventually gain control (by making their payload executable). Attackers are
able to perform such attacks by leveraging call-sites which rely on indirect
calls or return sites which rely on obtaining return address from stack memory.
To mitigate such attacks, risc-v extension zicfilp enforces that all indirect
calls must land on a landing pad instruction `lpad` else cpu will raise software
check exception (a new cpu exception cause code on riscv).
Similarly for return flow, risc-v extension zicfiss extends architecture with
- `sspush` instruction to push return address on a shadow stack
- `sspopchk` instruction to pop return address from shadow stack
and compare with input operand (i.e. return address on stack)
- `sspopchk` to raise software check exception if comparision above
was a mismatch
- Protection mechanism using which shadow stack is not writeable via
regular store instructions
More information an details can be found at extensions github repo [1].
Equivalent to landing pad (zicfilp) on x86 is `ENDBRANCH` instruction in Intel
CET [3] and branch target identification (BTI) [4] on arm.
Similarly x86's Intel CET has shadow stack [5] and arm64 has guarded control
stack (GCS) [6] which are very similar to risc-v's zicfiss shadow stack.
x86 and arm64 support for user mode shadow stack is already in mainline.
Kernel awareness for user control flow integrity
================================================
This series picks up Samuel Holland's envcfg changes [2] as well. So if those are
being applied independently, they should be removed from this series.
Enabling:
In order to maintain compatibility and not break anything in user mode, kernel
doesn't enable control flow integrity cpu extensions on binary by default.
Instead exposes a prctl interface to enable, disable and lock the shadow stack
or landing pad feature for a task. This allows userspace (loader) to enumerate
if all objects in its address space are compiled with shadow stack and landing
pad support and accordingly enable the feature. Additionally if a subsequent
`dlopen` happens on a library, user mode can take a decision again to disable
the feature (if incoming library is not compiled with support) OR terminate the
task (if user mode policy is strict to have all objects in address space to be
compiled with control flow integirty cpu feature). prctl to enable shadow stack
results in allocating shadow stack from virtual memory and activating for user
address space. x86 and arm64 are also following same direction due to similar
reason(s).
clone/fork:
On clone and fork, cfi state for task is inherited by child. Shadow stack is
part of virtual memory and is a writeable memory from kernel perspective
(writeable via a restricted set of instructions aka shadow stack instructions)
Thus kernel changes ensure that this memory is converted into read-only when
fork/clone happens and COWed when fault is taken due to sspush, sspopchk or
ssamoswap. In case `CLONE_VM` is specified and shadow stack is to be enabled,
kernel will automatically allocate a shadow stack for that clone call.
map_shadow_stack:
x86 introduced `map_shadow_stack` system call to allow user space to explicitly
map shadow stack memory in its address space. It is useful to allocate shadow
for different contexts managed by a single thread (green threads or contexts)
risc-v implements this system call as well.
signal management:
If shadow stack is enabled for a task, kernel performs an asynchronous control
flow diversion to deliver the signal and eventually expects userspace to issue
sigreturn so that original execution can be resumed. Even though resume context
is prepared by kernel, it is in user space memory and is subject to memory
corruption and corruption bugs can be utilized by attacker in this race window
to perform arbitrary sigreturn and eventually bypass cfi mechanism.
Another issue is how to ensure that cfi related state on sigcontext area is not
trampled by legacy apps or apps compiled with old kernel headers.
In order to mitigate control-flow hijacting, kernel prepares a token and place
it on shadow stack before signal delivery and places address of token in
sigcontext structure. During sigreturn, kernel obtains address of token from
sigcontext struture, reads token from shadow stack and validates it and only
then allow sigreturn to succeed. Compatiblity issue is solved by adopting
dynamic sigcontext management introduced for vector extension. This series
re-factor the code little bit to allow future sigcontext management easy (as
proposed by Andy Chiu from SiFive)
config and compilation:
Introduce a new risc-v config option `CONFIG_RISCV_USER_CFI`. Selecting this
config option picks the kernel support for user control flow integrity. This
optin is presented only if toolchain has shadow stack and landing pad support.
And is on purpose guarded by toolchain support. Reason being that eventually
vDSO also needs to be compiled in with shadow stack and landing pad support.
vDSO compile patches are not included as of now because landing pad labeling
scheme is yet to settle for usermode runtime.
To get more information on kernel interactions with respect to
zicfilp and zicfiss, patch series adds documentation for
`zicfilp` and `zicfiss` in following:
Documentation/arch/riscv/zicfiss.rst
Documentation/arch/riscv/zicfilp.rst
How to test this series
=======================
Toolchain
---------
$ git clone git@github.com:sifive/riscv-gnu-toolchain.git -b cfi-dev
$ riscv-gnu-toolchain/configure --prefix=<path-to-where-to-build> --with-arch=rv64gc_zicfilp_zicfiss --enable-linux --disable-gdb --with-extra-multilib-test="rv64gc_zicfilp_zicfiss-lp64d:-static"
$ make -j$(nproc)
Qemu
----
Get the lastest qemu
$ cd qemu
$ mkdir build
$ cd build
$ ../configure --target-list=riscv64-softmmu
$ make -j$(nproc)
Opensbi
-------
$ git clone git@github.com:deepak0414/opensbi.git -b v6_cfi_spec_split_opensbi
$ make CROSS_COMPILE=<your riscv toolchain> -j$(nproc) PLATFORM=generic
Linux
-----
Running defconfig is fine. CFI is enabled by default if the toolchain
supports it.
$ make ARCH=riscv CROSS_COMPILE=<path-to-cfi-riscv-gnu-toolchain>/build/bin/riscv64-unknown-linux-gnu- -j$(nproc) defconfig
$ make ARCH=riscv CROSS_COMPILE=<path-to-cfi-riscv-gnu-toolchain>/build/bin/riscv64-unknown-linux-gnu- -j$(nproc)
In case you're building your own rootfs using toolchain, please make sure you
pick following patch to ensure that vDSO compiled with lpad and shadow stack.
"arch/riscv: compile vdso with landing pad"
Branch where above patch can be picked
https://github.com/deepak0414/linux-riscv-cfi/tree/vdso_user_cfi_v6.12-rc1
Running
-------
Modify your qemu command to have:
-bios <path-to-cfi-opensbi>/build/platform/generic/firmware/fw_dynamic.bin
-cpu rv64,zicfilp=true,zicfiss=true,zimop=true,zcmop=true
vDSO related Opens (in the flux)
=================================
I am listing these opens for laying out plan and what to expect in future
patch sets. And of course for the sake of discussion.
Shadow stack and landing pad enabling in vDSO
----------------------------------------------
vDSO must have shadow stack and landing pad support compiled in for task
to have shadow stack and landing pad support. This patch series doesn't
enable that (yet). Enabling shadow stack support in vDSO should be
straight forward (intend to do that in next versions of patch set). Enabling
landing pad support in vDSO requires some collaboration with toolchain folks
to follow a single label scheme for all object binaries. This is necessary to
ensure that all indirect call-sites are setting correct label and target landing
pads are decorated with same label scheme.
How many vDSOs
---------------
Shadow stack instructions are carved out of zimop (may be operations) and if CPU
doesn't implement zimop, they're illegal instructions. Kernel could be running on
a CPU which may or may not implement zimop. And thus kernel will have to carry 2
different vDSOs and expose the appropriate one depending on whether CPU implements
zimop or not.
References
==========
[1] - https://github.com/riscv/riscv-cfi
[2] - https://lore.kernel.org/all/20240814081126.956287-1-samuel.holland@sifive.c…
[3] - https://lwn.net/Articles/889475/
[4] - https://developer.arm.com/documentation/109576/0100/Branch-Target-Identific…
[5] - https://www.intel.com/content/dam/develop/external/us/en/documents/catc17-i…
[6] - https://lwn.net/Articles/940403/
To: Thomas Gleixner <tglx(a)linutronix.de>
To: Ingo Molnar <mingo(a)redhat.com>
To: Borislav Petkov <bp(a)alien8.de>
To: Dave Hansen <dave.hansen(a)linux.intel.com>
To: x86(a)kernel.org
To: H. Peter Anvin <hpa(a)zytor.com>
To: Andrew Morton <akpm(a)linux-foundation.org>
To: Liam R. Howlett <Liam.Howlett(a)oracle.com>
To: Vlastimil Babka <vbabka(a)suse.cz>
To: Lorenzo Stoakes <lorenzo.stoakes(a)oracle.com>
To: Paul Walmsley <paul.walmsley(a)sifive.com>
To: Palmer Dabbelt <palmer(a)dabbelt.com>
To: Albert Ou <aou(a)eecs.berkeley.edu>
To: Conor Dooley <conor(a)kernel.org>
To: Rob Herring <robh(a)kernel.org>
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To: Arnd Bergmann <arnd(a)arndb.de>
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To: Kees Cook <kees(a)kernel.org>
To: Jonathan Corbet <corbet(a)lwn.net>
To: Shuah Khan <shuah(a)kernel.org>
To: Jann Horn <jannh(a)google.com>
To: Conor Dooley <conor+dt(a)kernel.org>
To: Miguel Ojeda <ojeda(a)kernel.org>
To: Alex Gaynor <alex.gaynor(a)gmail.com>
To: Boqun Feng <boqun.feng(a)gmail.com>
To: Gary Guo <gary(a)garyguo.net>
To: Björn Roy Baron <bjorn3_gh(a)protonmail.com>
To: Benno Lossin <benno.lossin(a)proton.me>
To: Andreas Hindborg <a.hindborg(a)kernel.org>
To: Alice Ryhl <aliceryhl(a)google.com>
To: Trevor Gross <tmgross(a)umich.edu>
Cc: linux-kernel(a)vger.kernel.org
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changelog
---------
v15:
- Toolchain has been updated to include `-fcf-protection` flag. This
exists for x86 as well. Updated kernel patches to compile vDSO and
selftest to compile with `fcf-protection=full` flag.
- selecting CONFIG_RISCV_USERCFI selects CONFIG_RISCV_SBI.
- Patch to enable shadow stack for kernel wasn't hidden behind
CONFIG_RISCV_USERCFI and CONFIG_RISCV_SBI. fixed that.
v14:
- rebased on top of palmer/sbi-v3. Thus dropped clement's FWFT patches
Updated RISCV_ISA_EXT_XXXX in hwcap and hwprobe constants.
- Took Radim's suggestions on bitfields.
- Placed cfi_state at the end of thread_info block so that current situation
is not disturbed with respect to member fields of thread_info in single
cacheline.
v13:
- cpu_supports_shadow_stack/cpu_supports_indirect_br_lp_instr uses
riscv_has_extension_unlikely()
- uses nops(count) to create nop slide
- RISCV_ACQUIRE_BARRIER is not needed in `amo_user_shstk`. Removed it
- changed ternaries to simply use implicit casting to convert to bool.
- kernel command line allows to disable zicfilp and zicfiss independently.
updated kernel-parameters.txt.
- ptrace user abi for cfi uses bitmasks instead of bitfields. Added ptrace
kselftest.
- cosmetic and grammatical changes to documentation.
v12:
- It seems like I had accidently squashed arch agnostic indirect branch
tracking prctl and riscv implementation of those prctls. Split them again.
- set_shstk_status/set_indir_lp_status perform CSR writes only when CPU
support is available. As suggested by Zong Li.
- Some minor clean up in kselftests as suggested by Zong Li.
v11:
- patch "arch/riscv: compile vdso with landing pad" was unconditionally
selecting `_zicfilp` for vDSO compile. fixed that. Changed `lpad 1` to
to `lpad 0`.
v10:
- dropped "mm: helper `is_shadow_stack_vma` to check shadow stack vma". This patch
is not that interesting to this patch series for risc-v. There are instances in
arch directories where VM_SHADOW_STACK flag is anyways used. Dropping this patch
to expedite merging in riscv tree.
- Took suggestions from `Clement` on "riscv: zicfiss / zicfilp enumeration" to
validate presence of cfi based on config.
- Added a patch for vDSO to have `lpad 0`. I had omitted this earlier to make sure
we add single vdso object with cfi enabled. But a vdso object with scheme of
zero labeled landing pad is least common denominator and should work with all
objects of zero labeled as well as function-signature labeled objects.
v9:
- rebased on master (39a803b754d5 fix braino in "9p: fix ->rename_sem exclusion")
- dropped "mm: Introduce ARCH_HAS_USER_SHADOW_STACK" (master has it from arm64/gcs)
- dropped "prctl: arch-agnostic prctl for shadow stack" (master has it from arm64/gcs)
v8:
- rebased on palmer/for-next
- dropped samuel holland's `envcfg` context switch patches.
they are in parlmer/for-next
v7:
- Removed "riscv/Kconfig: enable HAVE_EXIT_THREAD for riscv"
Instead using `deactivate_mm` flow to clean up.
see here for more context
https://lore.kernel.org/all/20230908203655.543765-1-rick.p.edgecombe@intel.…
- Changed the header include in `kselftest`. Hopefully this fixes compile
issue faced by Zong Li at SiFive.
- Cleaned up an orphaned change to `mm/mmap.c` in below patch
"riscv/mm : ensure PROT_WRITE leads to VM_READ | VM_WRITE"
- Lock interfaces for shadow stack and indirect branch tracking expect arg == 0
Any future evolution of this interface should accordingly define how arg should
be setup.
- `mm/map.c` has an instance of using `VM_SHADOW_STACK`. Fixed it to use helper
`is_shadow_stack_vma`.
- Link to v6: https://lore.kernel.org/r/20241008-v5_user_cfi_series-v6-0-60d9fe073f37@riv…
v6:
- Picked up Samuel Holland's changes as is with `envcfg` placed in
`thread` instead of `thread_info`
- fixed unaligned newline escapes in kselftest
- cleaned up messages in kselftest and included test output in commit message
- fixed a bug in clone path reported by Zong Li
- fixed a build issue if CONFIG_RISCV_ISA_V is not selected
(this was introduced due to re-factoring signal context
management code)
v5:
- rebased on v6.12-rc1
- Fixed schema related issues in device tree file
- Fixed some of the documentation related issues in zicfilp/ss.rst
(style issues and added index)
- added `SHADOW_STACK_SET_MARKER` so that implementation can define base
of shadow stack.
- Fixed warnings on definitions added in usercfi.h when
CONFIG_RISCV_USER_CFI is not selected.
- Adopted context header based signal handling as proposed by Andy Chiu
- Added support for enabling kernel mode access to shadow stack using
FWFT
(https://github.com/riscv-non-isa/riscv-sbi-doc/blob/master/src/ext-firmware…)
- Link to v5: https://lore.kernel.org/r/20241001-v5_user_cfi_series-v1-0-3ba65b6e550f@riv…
(Note: I had an issue in my workflow due to which version number wasn't
picked up correctly while sending out patches)
v4:
- rebased on 6.11-rc6
- envcfg: Converged with Samuel Holland's patches for envcfg management on per-
thread basis.
- vma_is_shadow_stack is renamed to is_vma_shadow_stack
- picked up Mark Brown's `ARCH_HAS_USER_SHADOW_STACK` patch
- signal context: using extended context management to maintain compatibility.
- fixed `-Wmissing-prototypes` compiler warnings for prctl functions
- Documentation fixes and amending typos.
- Link to v4: https://lore.kernel.org/all/20240912231650.3740732-1-debug@rivosinc.com/
v3:
- envcfg
logic to pick up base envcfg had a bug where `ENVCFG_CBZE` could have been
picked on per task basis, even though CPU didn't implement it. Fixed in
this series.
- dt-bindings
As suggested, split into separate commit. fixed the messaging that spec is
in public review
- arch_is_shadow_stack change
arch_is_shadow_stack changed to vma_is_shadow_stack
- hwprobe
zicfiss / zicfilp if present will get enumerated in hwprobe
- selftests
As suggested, added object and binary filenames to .gitignore
Selftest binary anyways need to be compiled with cfi enabled compiler which
will make sure that landing pad and shadow stack are enabled. Thus removed
separate enable/disable tests. Cleaned up tests a bit.
- Link to v3: https://lore.kernel.org/lkml/20240403234054.2020347-1-debug@rivosinc.com/
v2:
- Using config `CONFIG_RISCV_USER_CFI`, kernel support for riscv control flow
integrity for user mode programs can be compiled in the kernel.
- Enabling of control flow integrity for user programs is left to user runtime
- This patch series introduces arch agnostic `prctls` to enable shadow stack
and indirect branch tracking. And implements them on riscv.
---
Changes in v15:
- changelog posted just below cover letter
- Link to v14: https://lore.kernel.org/r/20250429-v5_user_cfi_series-v14-0-5239410d012a@ri…
Changes in v14:
- changelog posted just below cover letter
- Link to v13: https://lore.kernel.org/r/20250424-v5_user_cfi_series-v13-0-971437de586a@ri…
Changes in v13:
- changelog posted just below cover letter
- Link to v12: https://lore.kernel.org/r/20250314-v5_user_cfi_series-v12-0-e51202b53138@ri…
Changes in v12:
- changelog posted just below cover letter
- Link to v11: https://lore.kernel.org/r/20250310-v5_user_cfi_series-v11-0-86b36cbfb910@ri…
Changes in v11:
- changelog posted just below cover letter
- Link to v10: https://lore.kernel.org/r/20250210-v5_user_cfi_series-v10-0-163dcfa31c60@ri…
---
Andy Chiu (1):
riscv: signal: abstract header saving for setup_sigcontext
Deepak Gupta (25):
mm: VM_SHADOW_STACK definition for riscv
dt-bindings: riscv: zicfilp and zicfiss in dt-bindings (extensions.yaml)
riscv: zicfiss / zicfilp enumeration
riscv: zicfiss / zicfilp extension csr and bit definitions
riscv: usercfi state for task and save/restore of CSR_SSP on trap entry/exit
riscv/mm : ensure PROT_WRITE leads to VM_READ | VM_WRITE
riscv mm: manufacture shadow stack pte
riscv mmu: teach pte_mkwrite to manufacture shadow stack PTEs
riscv mmu: write protect and shadow stack
riscv/mm: Implement map_shadow_stack() syscall
riscv/shstk: If needed allocate a new shadow stack on clone
riscv: Implements arch agnostic shadow stack prctls
prctl: arch-agnostic prctl for indirect branch tracking
riscv: Implements arch agnostic indirect branch tracking prctls
riscv/traps: Introduce software check exception
riscv/signal: save and restore of shadow stack for signal
riscv/kernel: update __show_regs to print shadow stack register
riscv/ptrace: riscv cfi status and state via ptrace and in core files
riscv/hwprobe: zicfilp / zicfiss enumeration in hwprobe
riscv: kernel command line option to opt out of user cfi
riscv: enable kernel access to shadow stack memory via FWFT sbi call
riscv: create a config for shadow stack and landing pad instr support
riscv: Documentation for landing pad / indirect branch tracking
riscv: Documentation for shadow stack on riscv
kselftest/riscv: kselftest for user mode cfi
Jim Shu (1):
arch/riscv: compile vdso with landing pad
Documentation/admin-guide/kernel-parameters.txt | 8 +
Documentation/arch/riscv/index.rst | 2 +
Documentation/arch/riscv/zicfilp.rst | 115 +++++
Documentation/arch/riscv/zicfiss.rst | 179 +++++++
.../devicetree/bindings/riscv/extensions.yaml | 14 +
arch/riscv/Kconfig | 21 +
arch/riscv/Makefile | 5 +-
arch/riscv/include/asm/asm-prototypes.h | 1 +
arch/riscv/include/asm/assembler.h | 44 ++
arch/riscv/include/asm/cpufeature.h | 12 +
arch/riscv/include/asm/csr.h | 16 +
arch/riscv/include/asm/entry-common.h | 2 +
arch/riscv/include/asm/hwcap.h | 2 +
arch/riscv/include/asm/mman.h | 25 +
arch/riscv/include/asm/mmu_context.h | 7 +
arch/riscv/include/asm/pgtable.h | 30 +-
arch/riscv/include/asm/processor.h | 2 +
arch/riscv/include/asm/thread_info.h | 3 +
arch/riscv/include/asm/usercfi.h | 95 ++++
arch/riscv/include/asm/vector.h | 3 +
arch/riscv/include/uapi/asm/hwprobe.h | 2 +
arch/riscv/include/uapi/asm/ptrace.h | 34 ++
arch/riscv/include/uapi/asm/sigcontext.h | 1 +
arch/riscv/kernel/Makefile | 1 +
arch/riscv/kernel/asm-offsets.c | 8 +
arch/riscv/kernel/cpufeature.c | 13 +
arch/riscv/kernel/entry.S | 33 +-
arch/riscv/kernel/head.S | 27 +
arch/riscv/kernel/process.c | 26 +-
arch/riscv/kernel/ptrace.c | 95 ++++
arch/riscv/kernel/signal.c | 148 +++++-
arch/riscv/kernel/sys_hwprobe.c | 2 +
arch/riscv/kernel/sys_riscv.c | 10 +
arch/riscv/kernel/traps.c | 43 ++
arch/riscv/kernel/usercfi.c | 545 +++++++++++++++++++++
arch/riscv/kernel/vdso/Makefile | 6 +
arch/riscv/kernel/vdso/flush_icache.S | 4 +
arch/riscv/kernel/vdso/getcpu.S | 4 +
arch/riscv/kernel/vdso/rt_sigreturn.S | 4 +
arch/riscv/kernel/vdso/sys_hwprobe.S | 4 +
arch/riscv/mm/init.c | 2 +-
arch/riscv/mm/pgtable.c | 17 +
include/linux/cpu.h | 4 +
include/linux/mm.h | 7 +
include/uapi/linux/elf.h | 2 +
include/uapi/linux/prctl.h | 27 +
kernel/sys.c | 30 ++
tools/testing/selftests/riscv/Makefile | 2 +-
tools/testing/selftests/riscv/cfi/.gitignore | 3 +
tools/testing/selftests/riscv/cfi/Makefile | 10 +
tools/testing/selftests/riscv/cfi/cfi_rv_test.h | 82 ++++
tools/testing/selftests/riscv/cfi/riscv_cfi_test.c | 173 +++++++
tools/testing/selftests/riscv/cfi/shadowstack.c | 385 +++++++++++++++
tools/testing/selftests/riscv/cfi/shadowstack.h | 27 +
54 files changed, 2338 insertions(+), 29 deletions(-)
---
base-commit: 4181f8ad7a1061efed0219951d608d4988302af7
change-id: 20240930-v5_user_cfi_series-3dc332f8f5b2
--
- debug
5 months, 1 week
- 5
- 37
[PATCH] selftests: seccomp: Fix "performace" to "performance"
by Sumanth Gavini
Fix misspelling reported by codespell
Signed-off-by: Sumanth Gavini <sumanth.gavini(a)yahoo.com>
---
tools/testing/selftests/seccomp/seccomp_benchmark.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/testing/selftests/seccomp/seccomp_benchmark.c b/tools/testing/selftests/seccomp/seccomp_benchmark.c
index 94886c82ae60..5822e25e0217 100644
--- a/tools/testing/selftests/seccomp/seccomp_benchmark.c
+++ b/tools/testing/selftests/seccomp/seccomp_benchmark.c
@@ -1,6 +1,6 @@
/*
* Strictly speaking, this is not a test. But it can report during test
- * runs so relative performace can be measured.
+ * runs so relative performance can be measured.
*/
#define _GNU_SOURCE
#include <assert.h>
--
2.43.0
5 months, 1 week
- 2
- 1
[PATCH v2] Documentation: kunit: improve example on testing static functions
by Rae Moar
The documentation on testing static functions using the KUnit macros
VISIBLE_IF_KUNIT and EXPORT_SYMBOL_IF_KUNIT is lacking clarity and
missing key steps in the example. This has caused bugs and confusion
among developers.
Improve wording of description and add missing steps to the example.
This entails adding the "#include <kunit/visibility.h>" line and the
"MODULE_IMPORT_NS("EXPORTED_FOR_KUNIT_TESTING");" line. Both of which
were missing from the original example and key to exposing static
functions.
Reviewed-by: David Gow <davidgow(a)google.com>
Signed-off-by: Rae Moar <rmoar(a)google.com>
---
Changes from v1 to v2:
- Add quotes around EXPORTED_FOR_KUNIT_TESTING to change it to be a
string
Documentation/dev-tools/kunit/usage.rst | 38 +++++++++++++++++++------
1 file changed, 30 insertions(+), 8 deletions(-)
diff --git a/Documentation/dev-tools/kunit/usage.rst b/Documentation/dev-tools/kunit/usage.rst
index 22955d56b379..066ecda1dd98 100644
--- a/Documentation/dev-tools/kunit/usage.rst
+++ b/Documentation/dev-tools/kunit/usage.rst
@@ -670,28 +670,50 @@ with ``kunit_remove_action``.
Testing Static Functions
------------------------
-If we do not want to expose functions or variables for testing, one option is to
-conditionally export the used symbol. For example:
+If you want to test static functions without exposing those functions outside of
+testing, one option is conditionally export the symbol. When KUnit is enabled,
+the symbol is exposed but remains static otherwise. To use this method, follow
+the template below.
.. code-block:: c
- /* In my_file.c */
+ /* In the file containing functions to test "my_file.c" */
- VISIBLE_IF_KUNIT int do_interesting_thing();
+ #include <kunit/visibility.h>
+ #include <my_file.h>
+ ...
+ VISIBLE_IF_KUNIT int do_interesting_thing()
+ {
+ ...
+ }
EXPORT_SYMBOL_IF_KUNIT(do_interesting_thing);
- /* In my_file.h */
+ /* In the header file "my_file.h" */
#if IS_ENABLED(CONFIG_KUNIT)
int do_interesting_thing(void);
#endif
-Alternatively, you could conditionally ``#include`` the test file at the end of
-your .c file. For example:
+ /* In the KUnit test file "my_file_test.c" */
+
+ #include <kunit/visibility.h>
+ #include <my_file.h>
+ ...
+ MODULE_IMPORT_NS("EXPORTED_FOR_KUNIT_TESTING");
+ ...
+ // Use do_interesting_thing() in tests
+
+For a full example, see this `patch <https://lore.kernel.org/all/20221207014024.340230-3-rmoar@google.com/>`_
+where a test is modified to conditionally expose static functions for testing
+using the macros above.
+
+As an **alternative** to the method above, you could conditionally ``#include``
+the test file at the end of your .c file. This is not recommended but works
+if needed. For example:
.. code-block:: c
- /* In my_file.c */
+ /* In "my_file.c" */
static int do_interesting_thing();
base-commit: c2493384e8110d5a4792fff4b9d46e47b78ea10a
--
2.49.0.1112.g889b7c5bd8-goog
5 months, 1 week
- 1
- 0
[PATCH v2] kunit: tool: add test counts to JSON output
by Rae Moar
Add the test counts to the JSON output from kunit.py. For example:
...
"git_branch": "kselftest",
"misc":
{
"tests": 2,
"passed": 1.
"failed": 1,
"crashed": 0,
"skipped": 0,
"errors": 0,
}
...
To output the JSON using the following command:
./tools/testing/kunit/kunit.py run example --json
This has been requested by KUnit users. The counts are in a "misc"
field because the JSON output needs to be compliant with the KCIDB
submission guide. There are no counts fields but there is a "misc" field
in the guide.
Reviewed-by: David Gow <davidgow(a)google.com>
Signed-off-by: Rae Moar <rmoar(a)google.com>
---
tools/testing/kunit/kunit_json.py | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/tools/testing/kunit/kunit_json.py b/tools/testing/kunit/kunit_json.py
index 10ff65689dd8..c1463e6819b6 100644
--- a/tools/testing/kunit/kunit_json.py
+++ b/tools/testing/kunit/kunit_json.py
@@ -39,10 +39,20 @@ def _get_group_json(test: Test, common_fields: JsonObj) -> JsonObj:
status = _status_map.get(subtest.status, "FAIL")
test_cases.append({"name": subtest.name, "status": status})
+ test_counts = test.counts
+ counts_json = {
+ "tests": test_counts.total(),
+ "passed": test_counts.passed,
+ "failed": test_counts.failed,
+ "crashed": test_counts.crashed,
+ "skipped": test_counts.skipped,
+ "errors": test_counts.errors,
+ }
test_group = {
"name": test.name,
"sub_groups": sub_groups,
"test_cases": test_cases,
+ "misc": counts_json,
}
test_group.update(common_fields)
return test_group
base-commit: c2493384e8110d5a4792fff4b9d46e47b78ea10a
--
2.49.0.1112.g889b7c5bd8-goog
5 months, 1 week
- 1
- 0
[PATCH v5 0/5] Add support for the Bus Lock Threshold
by Manali Shukla
Misbehaving guests can cause bus locks to degrade the performance of
a system. Non-WB (write-back) and misaligned locked RMW (read-modify-write)
instructions are referred to as "bus locks" and require system wide
synchronization among all processors to guarantee the atomicity. The bus
locks can impose notable performance penalties for all processors within
the system.
Support for the Bus Lock Threshold is indicated by CPUID
Fn8000_000A_EDX[29] BusLockThreshold=1, the VMCB provides a Bus Lock
Threshold enable bit and an unsigned 16-bit Bus Lock Threshold count.
VMCB intercept bit
VMCB Offset Bits Function
14h 5 Intercept bus lock operations
Bus lock threshold count
VMCB Offset Bits Function
120h 15:0 Bus lock counter
During VMRUN, the bus lock threshold count is fetched and stored in an
internal count register. Prior to executing a bus lock within the guest,
the processor verifies the count in the bus lock register. If the count is
greater than zero, the processor executes the bus lock, reducing the count.
However, if the count is zero, the bus lock operation is not performed, and
instead, a Bus Lock Threshold #VMEXIT is triggered to transfer control to
the Virtual Machine Monitor (VMM).
A Bus Lock Threshold #VMEXIT is reported to the VMM with VMEXIT code 0xA5h,
VMEXIT_BUSLOCK. EXITINFO1 and EXITINFO2 are set to 0 on a VMEXIT_BUSLOCK.
On a #VMEXIT, the processor writes the current value of the Bus Lock
Threshold Counter to the VMCB.
Note: Currently, virtualizing the Bus Lock Threshold feature for L1 guest
is not supported.
More details about the Bus Lock Threshold feature can be found in AMD APM
[1].
v4 -> v5
- Incorporated review comments from Sean, Boris and Xiaoyao Li.
- Massage commit messages and documentation based on review comments.
- Removed bus_lock_rip from vcpu_svm and modified the implementation to
continue running bus_lock_counter across the nested traslations
accordingly.
- Removed pr_info which says "Buslock Threshold is supported"
v3 -> v4
- Incorporated Sean's review comments
- Added a preparatory patch to move linear_rip out of kvm_pio_request, so
that it can be used by the bus lock threshold patches.
- Added complete_userspace_buslock() function to reload bus_lock_counter
to '1' only if the usespace has not changed the RIP.
- Added changes to continue running bus_lock_counter across the nested
transitions.
v2 -> v3
- Drop parch to add virt tag in /proc/cpuinfo.
- Incorporated Tom's review comments.
v1 -> v2
- Incorporated misc review comments from Sean.
- Removed bus_lock_counter module parameter.
- Set the value of bus_lock_counter to zero by default and reload the value
by 1 in bus lock exit handler.
- Add documentation for the behavioral difference for KVM_EXIT_BUS_LOCK.
- Improved selftest for buslock to work on SVM and VMX.
- Rewrite the commit messages.
Patches are prepared on kvm-next/svm (bb5081f4abf2).
Testing done:
- Tested the Bus Lock Threshold functionality on normal, SEV, SEV-ES and
SEV-SNP guests.
- Tested the Bus Lock Threshold functionality on nested guests.
[1]: AMD64 Architecture Programmer's Manual Pub. 24593, April 2024,
Vol 2, 15.14.5 Bus Lock Threshold.
https://bugzilla.kernel.org/attachment.cgi?id=306250
---
v1: https://lore.kernel.org/kvm/20240709175145.9986-4-manali.shukla@amd.com/T/
v2: https://lore.kernel.org/kvm/20241001063413.687787-4-manali.shukla@amd.com/T/
v3: https://lore.kernel.org/kvm/20241004053341.5726-1-manali.shukla@amd.com/T/
v4: https://lore.kernel.org/kvm/20250324130248.126036-1-manali.shukla@amd.com/
Manali Shukla (3):
KVM: x86: Make kvm_pio_request.linear_rip a common field for user
exits
x86/cpufeatures: Add CPUID feature bit for the Bus Lock Threshold
KVM: SVM: Add support for KVM_CAP_X86_BUS_LOCK_EXIT on SVM CPUs
Nikunj A Dadhania (2):
KVM: SVM: Enable Bus lock threshold exit
KVM: selftests: Add bus lock exit test
Documentation/virt/kvm/api.rst | 5 +
arch/x86/include/asm/cpufeatures.h | 1 +
arch/x86/include/asm/kvm_host.h | 2 +-
arch/x86/include/asm/svm.h | 7 +-
arch/x86/include/uapi/asm/svm.h | 2 +
arch/x86/kvm/svm/nested.c | 35 +++++
arch/x86/kvm/svm/svm.c | 38 +++++
arch/x86/kvm/svm/svm.h | 1 +
arch/x86/kvm/x86.c | 8 +-
tools/testing/selftests/kvm/Makefile.kvm | 1 +
.../selftests/kvm/x86/kvm_buslock_test.c | 135 ++++++++++++++++++
11 files changed, 228 insertions(+), 7 deletions(-)
create mode 100644 tools/testing/selftests/kvm/x86/kvm_buslock_test.c
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--
2.34.1
5 months, 1 week
- 4
- 13
[PATCH net-next v7] selftests/vsock: add initial vmtest.sh for vsock
by Bobby Eshleman
This commit introduces a new vmtest.sh runner for vsock.
It uses virtme-ng/qemu to run tests in a VM. The tests validate G2H,
H2G, and loopback. The testing tools from tools/testing/vsock/ are
reused. Currently, only vsock_test is used.
VMCI and hyperv support is automatically built, though not used.
Only tested on x86.
To run:
$ make -C tools/testing/selftests TARGETS=vsock
$ tools/testing/selftests/vsock/vmtest.sh
or
$ make -C tools/testing/selftests TARGETS=vsock run_tests
Example runs (after make -C tools/testing/selftests TARGETS=vsock):
$ ./tools/testing/selftests/vsock/vmtest.sh
TAP version 13
1..3
ok 0 vm_server_host_client
ok 1 vm_client_host_server
ok 2 vm_loopback
$ ./tools/testing/selftests/vsock/vmtest.sh vm_loopback
TAP version 13
1..1
ok 0 vm_loopback
$ mkdir -p ~/scratch
$ make -C tools/testing/selftests install TARGETS=vsock INSTALL_PATH=~/scratch
[... omitted ...]
$ cd ~/scratch
$ ./run_kselftest.sh
TAP version 13
1..1
ok 1 selftests: vsock: vmtest.sh
Future work can include vsock_diag_test.
The tap output style copies mm's run_vmtests.sh.
Because vsock requires a VM to test anything other than loopback, this
patch adds vmtest.sh as a kselftest itself. This is different than other
systems that have a "vmtest.sh", where it is used as a utility script to
spin up a VM to run the selftests as a guest (but isn't hooked into
kselftest).
Testing in NIPA is still WIP.
Signed-off-by: Bobby Eshleman <bobbyeshleman(a)gmail.com>
---
Changes in v7:
- fix exit code bug when ran is kselftest: use cnt_total instead of KSFT_NUM_TESTS
- updated commit message with updated output
- updated commit message with commands for installing/running as
kselftest
- Link to v6: https://lore.kernel.org/r/20250515-vsock-vmtest-v6-1-9af1cc023900@gmail.com
Changes in v6:
- add make cmd in commit message in vmtest.sh example (Stefano)
- check nonzero size of QEMU_PIDFILE using -s conditional (Stefano)
- display log file path after tests so it is easier to find amongst other random names
- cleanup qemu pidfile if qemu is unable to remove it
- make oops/warning failures more obvious with 'FAIL' prefix in log
(simply saying 'detected' wasn't clear enough to identify failing
condition)
- Link to v5: https://lore.kernel.org/r/20250513-vsock-vmtest-v5-1-4e75c4a45ceb@gmail.com
Changes in v5:
- make log file a tmpfile (Paolo)
- make sure both default and user defined QEMU gets handled by the dependency check (Paolo)
- increased VM boot up timeout from 1m to 3m for slow hosts (Paolo)
- rename vm_setup -> vm_start (Paolo)
- derive wait_for_listener from selftests/net/net_helper.sh to removes ss usage
- Remove unused 'unset IFS' line (Paolo)
- leave space after variable declarations (Paolo)
- make QEMU_PIDFILE a tmp file (Paolo)
- make everything readonly that is only read (Paolo)
- source ktap_helpers.sh for KSFT_PASS and friends (Paolo)
- don't check for timeout util (Paolo)
- add missing usage string for -q qemu arg
- add tap prefix to SUMMARY line since it isn't part of TAP protocol
- exit with the correct status code based on failure/pass counts
- Link to v4: https://lore.kernel.org/r/20250507-vsock-vmtest-v4-1-6e2a97262cd6@gmail.com
Changes in v4:
- do not use special tab delimiter for help string parsing (Stefano + Paolo)
- fix paths for when installing kselftest and running out-of-tree (Paolo)
- change vng to using running kernel instead of compiled kernel (Paolo)
- use multi-line string for QEMU_OPTS (Stefano)
- change timeout to 300s (Paolo)
- skip if tools are not found and use kselftests status codes (Paolo)
- remove build from vmtest.sh (Paolo)
- change 2222 -> SSH_HOST_PORT (Stefano)
- add tap-format output
- add vmtest.log to gitignore
- check for vsock_test binary and remind user to build it if missing
- create a proper build in makefile
- style fixes
- add ssh, timeout, and pkill to dependency check, just in case
- fix numerical comparison in conditionals
- check qemu pidfile exists before proceeding (avoid wasting time waiting for ssh)
- fix tracking of pass/fail bug
- fix stderr redirection bug
- Link to v3: https://lore.kernel.org/r/20250428-vsock-vmtest-v3-1-181af6163f3e@gmail.com
Changes in v3:
- use common conditional syntax for checking variables
- use return value instead of global rc
- fix typo TEST_HOST_LISTENER_PORT -> TEST_HOST_PORT_LISTENER
- use SIGTERM instead of SIGKILL on cleanup
- use peer-cid=1 for loopback
- change sleep delay times into globals
- fix test_vm_loopback logging
- add test selection in arguments
- make QEMU an argument
- check that vng binary is on path
- use QEMU variable
- change <tab><backslash> to <space><backslash>
- fix hardcoded file paths
- add comment in commit msg about script that vmtest.sh was based off of
- Add tools/testing/selftest/vsock/Makefile for kselftest
- Link to v2: https://lore.kernel.org/r/20250417-vsock-vmtest-v2-1-3901a27331e8@gmail.com
Changes in v2:
- add kernel oops and warnings checker
- change testname variable to use FUNCNAME
- fix spacing in test_vm_server_host_client
- add -s skip build option to vmtest.sh
- add test_vm_loopback
- pass port to vm_wait_for_listener
- fix indentation in vmtest.sh
- add vmci and hyperv to config
- changed whitespace from tabs to spaces in help string
- Link to v1: https://lore.kernel.org/r/20250410-vsock-vmtest-v1-1-f35a81dab98c@gmail.com
---
MAINTAINERS | 1 +
tools/testing/selftests/vsock/.gitignore | 2 +
tools/testing/selftests/vsock/Makefile | 16 ++
tools/testing/selftests/vsock/config | 114 ++++++++
tools/testing/selftests/vsock/settings | 1 +
tools/testing/selftests/vsock/vmtest.sh | 448 +++++++++++++++++++++++++++++++
6 files changed, 582 insertions(+)
diff --git a/MAINTAINERS b/MAINTAINERS
index 657a67f9031ef7798c19ac63e6383d4cb18a9e1f..3fbdd7bbfce7196a3cc7db70203317c6bd0e51fd 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -25751,6 +25751,7 @@ F: include/uapi/linux/vm_sockets.h
F: include/uapi/linux/vm_sockets_diag.h
F: include/uapi/linux/vsockmon.h
F: net/vmw_vsock/
+F: tools/testing/selftests/vsock/
F: tools/testing/vsock/
VMALLOC
diff --git a/tools/testing/selftests/vsock/.gitignore b/tools/testing/selftests/vsock/.gitignore
new file mode 100644
index 0000000000000000000000000000000000000000..9c5bf379480f829a14713d5f5dc7d525bc272e84
--- /dev/null
+++ b/tools/testing/selftests/vsock/.gitignore
@@ -0,0 +1,2 @@
+vmtest.log
+vsock_test
diff --git a/tools/testing/selftests/vsock/Makefile b/tools/testing/selftests/vsock/Makefile
new file mode 100644
index 0000000000000000000000000000000000000000..7ab4970e5e8a019be33f96a36f95c00573d7bfcf
--- /dev/null
+++ b/tools/testing/selftests/vsock/Makefile
@@ -0,0 +1,16 @@
+# SPDX-License-Identifier: GPL-2.0
+
+CURDIR := $(abspath .)
+TOOLSDIR := $(abspath ../../..)
+
+$(OUTPUT)/vsock_test: $(TOOLSDIR)/testing/vsock/vsock_test
+ install -m 755 $< $@
+
+$(TOOLSDIR)/testing/vsock/vsock_test:
+ $(MAKE) -C $(TOOLSDIR)/testing/vsock vsock_test
+
+TEST_PROGS += vmtest.sh
+TEST_GEN_FILES := vsock_test
+
+include ../lib.mk
+
diff --git a/tools/testing/selftests/vsock/config b/tools/testing/selftests/vsock/config
new file mode 100644
index 0000000000000000000000000000000000000000..3bffaaf98fff92dc0e3bc1286afa3d8d5d52f4c7
--- /dev/null
+++ b/tools/testing/selftests/vsock/config
@@ -0,0 +1,114 @@
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_BPF=y
+CONFIG_BPF_SYSCALL=y
+CONFIG_BPF_JIT=y
+CONFIG_HAVE_EBPF_JIT=y
+CONFIG_BPF_EVENTS=y
+CONFIG_FTRACE_SYSCALLS=y
+CONFIG_FUNCTION_TRACER=y
+CONFIG_HAVE_DYNAMIC_FTRACE=y
+CONFIG_DYNAMIC_FTRACE=y
+CONFIG_HAVE_KPROBES=y
+CONFIG_KPROBES=y
+CONFIG_KPROBE_EVENTS=y
+CONFIG_ARCH_SUPPORTS_UPROBES=y
+CONFIG_UPROBES=y
+CONFIG_UPROBE_EVENTS=y
+CONFIG_DEBUG_FS=y
+CONFIG_FW_CFG_SYSFS=y
+CONFIG_FW_CFG_SYSFS_CMDLINE=y
+CONFIG_DRM=y
+CONFIG_DRM_VIRTIO_GPU=y
+CONFIG_DRM_VIRTIO_GPU_KMS=y
+CONFIG_DRM_BOCHS=y
+CONFIG_VIRTIO_IOMMU=y
+CONFIG_SOUND=y
+CONFIG_SND=y
+CONFIG_SND_SEQUENCER=y
+CONFIG_SND_PCI=y
+CONFIG_SND_INTEL8X0=y
+CONFIG_SND_HDA_CODEC_REALTEK=y
+CONFIG_SECURITYFS=y
+CONFIG_CGROUP_BPF=y
+CONFIG_SQUASHFS=y
+CONFIG_SQUASHFS_XZ=y
+CONFIG_SQUASHFS_ZSTD=y
+CONFIG_FUSE_FS=y
+CONFIG_SERIO=y
+CONFIG_PCI=y
+CONFIG_INPUT=y
+CONFIG_INPUT_KEYBOARD=y
+CONFIG_KEYBOARD_ATKBD=y
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_X86_VERBOSE_BOOTUP=y
+CONFIG_VGA_CONSOLE=y
+CONFIG_FB=y
+CONFIG_FB_VESA=y
+CONFIG_FRAMEBUFFER_CONSOLE=y
+CONFIG_RTC_CLASS=y
+CONFIG_RTC_HCTOSYS=y
+CONFIG_RTC_DRV_CMOS=y
+CONFIG_HYPERVISOR_GUEST=y
+CONFIG_PARAVIRT=y
+CONFIG_KVM_GUEST=y
+CONFIG_KVM=y
+CONFIG_KVM_INTEL=y
+CONFIG_KVM_AMD=y
+CONFIG_VSOCKETS=y
+CONFIG_VSOCKETS_DIAG=y
+CONFIG_VSOCKETS_LOOPBACK=y
+CONFIG_VMWARE_VMCI_VSOCKETS=y
+CONFIG_VIRTIO_VSOCKETS=y
+CONFIG_VIRTIO_VSOCKETS_COMMON=y
+CONFIG_HYPERV_VSOCKETS=y
+CONFIG_VMWARE_VMCI=y
+CONFIG_VHOST_VSOCK=y
+CONFIG_HYPERV=y
+CONFIG_UEVENT_HELPER=n
+CONFIG_VIRTIO=y
+CONFIG_VIRTIO_PCI=y
+CONFIG_VIRTIO_MMIO=y
+CONFIG_VIRTIO_BALLOON=y
+CONFIG_NET=y
+CONFIG_NET_CORE=y
+CONFIG_NETDEVICES=y
+CONFIG_NETWORK_FILESYSTEMS=y
+CONFIG_INET=y
+CONFIG_NET_9P=y
+CONFIG_NET_9P_VIRTIO=y
+CONFIG_9P_FS=y
+CONFIG_VIRTIO_NET=y
+CONFIG_CMDLINE_OVERRIDE=n
+CONFIG_BINFMT_SCRIPT=y
+CONFIG_SHMEM=y
+CONFIG_TMPFS=y
+CONFIG_UNIX=y
+CONFIG_MODULE_SIG_FORCE=n
+CONFIG_DEVTMPFS=y
+CONFIG_TTY=y
+CONFIG_VT=y
+CONFIG_UNIX98_PTYS=y
+CONFIG_EARLY_PRINTK=y
+CONFIG_INOTIFY_USER=y
+CONFIG_BLOCK=y
+CONFIG_SCSI_LOWLEVEL=y
+CONFIG_SCSI=y
+CONFIG_SCSI_VIRTIO=y
+CONFIG_BLK_DEV_SD=y
+CONFIG_VIRTIO_CONSOLE=y
+CONFIG_WATCHDOG=y
+CONFIG_WATCHDOG_CORE=y
+CONFIG_I6300ESB_WDT=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
+CONFIG_OVERLAY_FS=y
+CONFIG_DAX=y
+CONFIG_DAX_DRIVER=y
+CONFIG_FS_DAX=y
+CONFIG_MEMORY_HOTPLUG=y
+CONFIG_MEMORY_HOTREMOVE=y
+CONFIG_ZONE_DEVICE=y
+CONFIG_FUSE_FS=y
+CONFIG_VIRTIO_FS=y
+CONFIG_VSOCKETS=y
+CONFIG_VIRTIO_VSOCKETS=y
diff --git a/tools/testing/selftests/vsock/settings b/tools/testing/selftests/vsock/settings
new file mode 100644
index 0000000000000000000000000000000000000000..694d70710ff08ac9fc91e9ecb5dbdadcf051f019
--- /dev/null
+++ b/tools/testing/selftests/vsock/settings
@@ -0,0 +1 @@
+timeout=300
diff --git a/tools/testing/selftests/vsock/vmtest.sh b/tools/testing/selftests/vsock/vmtest.sh
new file mode 100755
index 0000000000000000000000000000000000000000..61979174a32b59a1230e479d31cda4ceb906480d
--- /dev/null
+++ b/tools/testing/selftests/vsock/vmtest.sh
@@ -0,0 +1,448 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+#
+# Copyright (c) 2025 Meta Platforms, Inc. and affiliates
+#
+# Dependencies:
+# * virtme-ng
+# * busybox-static (used by virtme-ng)
+# * qemu (used by virtme-ng)
+
+readonly SCRIPT_DIR="$(cd -P -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd -P)"
+
+source ${SCRIPT_DIR}/../kselftest/ktap_helpers.sh
+
+readonly TAP_PREFIX="# "
+readonly VSOCK_TEST=${SCRIPT_DIR}/vsock_test
+
+readonly TEST_GUEST_PORT=51000
+readonly TEST_HOST_PORT=50000
+readonly TEST_HOST_PORT_LISTENER=50001
+readonly SSH_GUEST_PORT=22
+readonly SSH_HOST_PORT=2222
+readonly VSOCK_CID=1234
+readonly WAIT_PERIOD=3
+readonly WAIT_PERIOD_MAX=60
+readonly WAIT_TOTAL=$(( WAIT_PERIOD * WAIT_PERIOD_MAX ))
+readonly QEMU_PIDFILE=$(mktemp /tmp/qemu_vsock_vmtest_XXXX.pid)
+
+# virtme-ng offers a netdev for ssh when using "--ssh", but we also need a
+# control port forwarded for vsock_test. Because virtme-ng doesn't support
+# adding an additional port to forward to the device created from "--ssh" and
+# virtme-init mistakenly sets identical IPs to the ssh device and additional
+# devices, we instead opt out of using --ssh, add the device manually, and also
+# add the kernel cmdline options that virtme-init uses to setup the interface.
+readonly QEMU_TEST_PORT_FWD="hostfwd=tcp::${TEST_HOST_PORT}-:${TEST_GUEST_PORT}"
+readonly QEMU_SSH_PORT_FWD="hostfwd=tcp::${SSH_HOST_PORT}-:${SSH_GUEST_PORT}"
+readonly QEMU_OPTS="\
+ -netdev user,id=n0,${QEMU_TEST_PORT_FWD},${QEMU_SSH_PORT_FWD} \
+ -device virtio-net-pci,netdev=n0 \
+ -device vhost-vsock-pci,guest-cid=${VSOCK_CID} \
+ --pidfile ${QEMU_PIDFILE} \
+"
+readonly KERNEL_CMDLINE="virtme.dhcp net.ifnames=0 biosdevname=0 virtme.ssh virtme_ssh_user=$USER"
+readonly LOG=$(mktemp /tmp/vsock_vmtest_XXXX.log)
+readonly TEST_NAMES=(vm_server_host_client vm_client_host_server vm_loopback)
+readonly TEST_DESCS=(
+ "Run vsock_test in server mode on the VM and in client mode on the host."
+ "Run vsock_test in client mode on the VM and in server mode on the host."
+ "Run vsock_test using the loopback transport in the VM."
+)
+
+VERBOSE=0
+
+usage() {
+ local name
+ local desc
+ local i
+
+ echo
+ echo "$0 [OPTIONS] [TEST]..."
+ echo "If no TEST argument is given, all tests will be run."
+ echo
+ echo "Options"
+ echo " -v: verbose output"
+ echo " -q: set the path to or name of qemu binary"
+ echo
+ echo "Available tests"
+
+ for ((i = 0; i < ${#TEST_NAMES[@]}; i++)); do
+ name=${TEST_NAMES[${i}]}
+ desc=${TEST_DESCS[${i}]}
+ printf "\t%-35s%-35s\n" "${name}" "${desc}"
+ done
+ echo
+
+ exit 1
+}
+
+die() {
+ echo "$*" >&2
+ exit ${KSFT_FAIL}
+}
+
+vm_ssh() {
+ ssh -q -o UserKnownHostsFile=/dev/null -p ${SSH_HOST_PORT} localhost $*
+ return $?
+}
+
+cleanup() {
+ if [[ -s "${QEMU_PIDFILE}" ]]; then
+ pkill -SIGTERM -F ${QEMU_PIDFILE} 2>&1 > /dev/null
+ fi
+
+ # If failure occurred during or before qemu start up, then we need
+ # to clean this up ourselves.
+ if [[ -e "${QEMU_PIDFILE}" ]]; then
+ rm "${QEMU_PIDFILE}"
+ fi
+}
+
+check_args() {
+ local found
+
+ for arg in "$@"; do
+ found=0
+ for name in "${TEST_NAMES[@]}"; do
+ if [[ "${name}" = "${arg}" ]]; then
+ found=1
+ break
+ fi
+ done
+
+ if [[ "${found}" -eq 0 ]]; then
+ echo "${arg} is not an available test" >&2
+ usage
+ fi
+ done
+
+ for arg in "$@"; do
+ if ! command -v > /dev/null "test_${arg}"; then
+ echo "Test ${arg} not found" >&2
+ usage
+ fi
+ done
+}
+
+check_deps() {
+ for dep in vng ${QEMU} busybox pkill ssh; do
+ if [[ ! -x "$(command -v ${dep})" ]]; then
+ echo -e "skip: dependency ${dep} not found!\n"
+ exit ${KSFT_SKIP}
+ fi
+ done
+
+ if [[ ! -x $(command -v ${VSOCK_TEST}) ]]; then
+ printf "skip: ${VSOCK_TEST} not found!"
+ printf " Please build the kselftest vsock target.\n"
+ exit ${KSFT_SKIP}
+ fi
+}
+
+vm_start() {
+ local VNG_OPTS=""
+ local logfile=/dev/null
+ local qemu
+
+ qemu=$(command -v ${QEMU})
+
+ if [[ "${VERBOSE}" = 1 ]]; then
+ VNG_OPTS="--verbose"
+ logfile=/dev/stdout
+ fi
+ vng \
+ $VNG_OPTS \
+ --run \
+ --qemu-opts="${QEMU_OPTS}" \
+ --qemu="${qemu}" \
+ --user root \
+ --append "${KERNEL_CMDLINE}" \
+ --rw &> ${logfile} &
+
+ timeout ${WAIT_TOTAL} \
+ bash -c 'while [[ ! -s '"${QEMU_PIDFILE}"' ]]; do sleep 1; done; exit 0'
+ if [[ ! $? -eq 0 ]]; then
+ die "failed to boot VM"
+ fi
+}
+
+vm_wait_for_ssh() {
+ local i
+
+ i=0
+ while [[ true ]]; do
+ if [[ ${i} -gt ${WAIT_PERIOD_MAX} ]]; then
+ die "Timed out waiting for guest ssh"
+ fi
+ vm_ssh -- true
+ if [[ $? -eq 0 ]]; then
+ break
+ fi
+ i=$(( i + 1 ))
+ sleep ${WAIT_PERIOD}
+ done
+}
+
+# derived from selftests/net/net_helper.sh
+wait_for_listener()
+{
+ local port=$1
+ local interval=$2
+ local max_intervals=$3
+ local protocol=tcp
+ local pattern
+ local i
+
+ pattern=":$(printf "%04X" "${port}") "
+
+ # for tcp protocol additionally check the socket state
+ [ "${protocol}" = "tcp" ] && pattern="${pattern}0A"
+ for i in $(seq "${max_intervals}"); do
+ if awk '{print $2" "$4}' /proc/net/"${protocol}"* | \
+ grep -q "${pattern}"; then
+ break
+ fi
+ sleep "${interval}"
+ done
+}
+
+vm_wait_for_listener() {
+ local port=$1
+
+ vm_ssh <<EOF
+$(declare -f wait_for_listener)
+wait_for_listener ${port} ${WAIT_PERIOD} ${WAIT_PERIOD_MAX}
+EOF
+}
+
+host_wait_for_listener() {
+ wait_for_listener ${TEST_HOST_PORT_LISTENER} ${WAIT_PERIOD} ${WAIT_PERIOD_MAX}
+}
+
+__log_stdin() {
+ cat | awk '{ printf "%s:\t%s\n","'"${prefix}"'", $0 }'
+}
+
+__log_args() {
+ echo "$*" | awk '{ printf "%s:\t%s\n","'"${prefix}"'", $0 }'
+}
+
+log() {
+ local prefix="$1"
+
+ shift
+ local redirect=
+ if [[ ${VERBOSE} -eq 0 ]]; then
+ redirect=/dev/null
+ else
+ redirect=/dev/stdout
+ fi
+
+ if [[ "$#" -eq 0 ]]; then
+ __log_stdin | tee -a ${LOG} > ${redirect}
+ else
+ __log_args | tee -a ${LOG} > ${redirect}
+ fi
+}
+
+log_setup() {
+ log "setup" "$@"
+}
+
+log_host() {
+ local testname=$1
+
+ shift
+ log "test:${testname}:host" "$@"
+}
+
+log_guest() {
+ local testname=$1
+
+ shift
+ log "test:${testname}:guest" "$@"
+}
+
+tap_prefix() {
+ sed -e "s/^/${TAP_PREFIX}/"
+}
+
+tap_output() {
+ if [[ ! -z "$TAP_PREFIX" ]]; then
+ read str
+ echo $str
+ fi
+}
+
+test_vm_server_host_client() {
+ local testname="${FUNCNAME[0]#test_}"
+
+ vm_ssh -- "${VSOCK_TEST}" \
+ --mode=server \
+ --control-port="${TEST_GUEST_PORT}" \
+ --peer-cid=2 \
+ 2>&1 | log_guest "${testname}" &
+
+ vm_wait_for_listener ${TEST_GUEST_PORT}
+
+ ${VSOCK_TEST} \
+ --mode=client \
+ --control-host=127.0.0.1 \
+ --peer-cid="${VSOCK_CID}" \
+ --control-port="${TEST_HOST_PORT}" 2>&1 | log_host "${testname}"
+
+ return $?
+}
+
+test_vm_client_host_server() {
+ local testname="${FUNCNAME[0]#test_}"
+
+ ${VSOCK_TEST} \
+ --mode "server" \
+ --control-port "${TEST_HOST_PORT_LISTENER}" \
+ --peer-cid "${VSOCK_CID}" 2>&1 | log_host "${testname}" &
+
+ host_wait_for_listener
+
+ vm_ssh -- "${VSOCK_TEST}" \
+ --mode=client \
+ --control-host=10.0.2.2 \
+ --peer-cid=2 \
+ --control-port="${TEST_HOST_PORT_LISTENER}" 2>&1 | log_guest "${testname}"
+
+ return $?
+}
+
+test_vm_loopback() {
+ local testname="${FUNCNAME[0]#test_}"
+ local port=60000 # non-forwarded local port
+
+ vm_ssh -- ${VSOCK_TEST} \
+ --mode=server \
+ --control-port="${port}" \
+ --peer-cid=1 2>&1 | log_guest "${testname}" &
+
+ vm_wait_for_listener ${port}
+
+ vm_ssh -- ${VSOCK_TEST} \
+ --mode=client \
+ --control-host="127.0.0.1" \
+ --control-port="${port}" \
+ --peer-cid=1 2>&1 | log_guest "${testname}"
+
+ return $?
+}
+
+run_test() {
+ local host_oops_cnt_before
+ local host_warn_cnt_before
+ local vm_oops_cnt_before
+ local vm_warn_cnt_before
+ local host_oops_cnt_after
+ local host_warn_cnt_after
+ local vm_oops_cnt_after
+ local vm_warn_cnt_after
+ local name
+ local rc
+
+ host_oops_cnt_before=$(dmesg | grep -c -i 'Oops')
+ host_warn_cnt_before=$(dmesg --level=warn | wc -l)
+ vm_oops_cnt_before=$(vm_ssh -- dmesg | grep -c -i 'Oops')
+ vm_warn_cnt_before=$(vm_ssh -- dmesg --level=warn | wc -l)
+
+ name=$(echo "${1}" | awk '{ print $1 }')
+ eval test_"${name}"
+ rc=$?
+
+ host_oops_cnt_after=$(dmesg | grep -i 'Oops' | wc -l)
+ if [[ ${host_oops_cnt_after} -gt ${host_oops_cnt_before} ]]; then
+ echo "FAIL: kernel oops detected on host" | log_host ${name}
+ rc=$KSFT_FAIL
+ fi
+
+ host_warn_cnt_after=$(dmesg --level=warn | wc -l)
+ if [[ ${host_warn_cnt_after} -gt ${host_warn_cnt_before} ]]; then
+ echo "FAIL: kernel warning detected on host" | log_host ${name}
+ rc=$KSFT_FAIL
+ fi
+
+ vm_oops_cnt_after=$(vm_ssh -- dmesg | grep -i 'Oops' | wc -l)
+ if [[ ${vm_oops_cnt_after} -gt ${vm_oops_cnt_before} ]]; then
+ echo "FAIL: kernel oops detected on vm" | log_host ${name}
+ rc=$KSFT_FAIL
+ fi
+
+ vm_warn_cnt_after=$(vm_ssh -- dmesg --level=warn | wc -l)
+ if [[ ${vm_warn_cnt_after} -gt ${vm_warn_cnt_before} ]]; then
+ echo "FAIL: kernel warning detected on vm" | log_host ${name}
+ rc=$KSFT_FAIL
+ fi
+
+ return ${rc}
+}
+
+QEMU="qemu-system-$(uname -m)"
+
+while getopts :hvsq: o
+do
+ case $o in
+ v) VERBOSE=1;;
+ q) QEMU=$OPTARG;;
+ h|*) usage;;
+ esac
+done
+shift $((OPTIND-1))
+
+trap cleanup EXIT
+
+if [[ ${#} -eq 0 ]]; then
+ ARGS=(${TEST_NAMES[@]})
+else
+ ARGS=($@)
+fi
+
+check_args "${ARGS[@]}"
+check_deps
+
+echo "TAP version 13" | tap_output
+echo "1..${#ARGS[@]}" | tap_output
+
+log_setup "Booting up VM"
+vm_start
+vm_wait_for_ssh
+log_setup "VM booted up"
+
+cnt_pass=0
+cnt_fail=0
+cnt_skip=0
+cnt_total=0
+exitcode=0
+for arg in "${ARGS[@]}"; do
+ run_test "${arg}"
+ rc=$?
+ if [[ ${rc} == $KSFT_PASS ]]; then
+ cnt_pass=$(( cnt_pass + 1 ))
+ echo "[PASS]" | tap_prefix
+ echo "ok ${cnt_total} ${arg}" | tap_output
+ elif [[ ${rc} == $KSFT_SKIP ]]; then
+ cnt_skip=$(( cnt_skip + 1 ))
+ echo "[SKIP]" | tap_prefix
+ echo "ok ${cnt_total} ${arg} # SKIP" | tap_output
+ exitcode=$KSFT_SKIP
+ elif [[ ${rc} == $KSFT_FAIL ]]; then
+ cnt_fail=$(( cnt_fail + 1 ))
+ echo "[FAIL]" | tap_prefix
+ echo "not ok ${cnt_total} ${arg} # exit=$rc" | tap_output
+ exitcode=$KSFT_FAIL
+ fi
+ cnt_total=$(( cnt_total + 1 ))
+done
+
+echo "SUMMARY: PASS=${cnt_pass} SKIP=${cnt_skip} FAIL=${cnt_fail}" | tap_prefix
+echo "Log: ${LOG}" | tap_prefix
+
+if [ $((cnt_pass + cnt_skip)) -eq ${cnt_total} ]; then
+ exit "$KSFT_PASS"
+else
+ exit "$KSFT_FAIL"
+fi
---
base-commit: 8066e388be48f1ad62b0449dc1d31a25489fa12a
change-id: 20250325-vsock-vmtest-b3a21d2102c2
Best regards,
--
Bobby Eshleman <bobbyeshleman(a)gmail.com>
5 months, 1 week
- 3
- 7
[PATCH v2] drm/tests: Drop drm_kunit_helper_acquire_ctx_alloc()
by Maxime Ripard
lockdep complains when a lock is released in a separate thread the
lock is taken in, and it turns out that kunit does run its actions in a
separate thread than the test ran in.
This means that drm_kunit_helper_acquire_ctx_alloc() just cannot work as
it's supposed to, so let's just get rid of it.
Suggested-by: Simona Vetter <simona.vetter(a)ffwll.ch>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov(a)linaro.org>
Signed-off-by: Maxime Ripard <mripard(a)kernel.org>
---
Changes from v1:
- Reworded the commit log (Sima)
---
drivers/gpu/drm/tests/drm_atomic_state_test.c | 24 +-
.../drm/tests/drm_hdmi_state_helper_test.c | 254 +++++++++++-------
drivers/gpu/drm/tests/drm_kunit_helpers.c | 41 ---
.../gpu/drm/vc4/tests/vc4_test_pv_muxing.c | 46 ++--
include/drm/drm_kunit_helpers.h | 2 -
5 files changed, 191 insertions(+), 176 deletions(-)
diff --git a/drivers/gpu/drm/tests/drm_atomic_state_test.c b/drivers/gpu/drm/tests/drm_atomic_state_test.c
index 5945c3298901..2f6ac7a09f44 100644
--- a/drivers/gpu/drm/tests/drm_atomic_state_test.c
+++ b/drivers/gpu/drm/tests/drm_atomic_state_test.c
@@ -187,11 +187,11 @@ static int set_up_atomic_state(struct kunit *test,
* connectors are changed but the CRTC mode is not.
*/
static void drm_test_check_connector_changed_modeset(struct kunit *test)
{
struct drm_atomic_test_priv *priv;
- struct drm_modeset_acquire_ctx *ctx;
+ struct drm_modeset_acquire_ctx ctx;
struct drm_connector *old_conn, *new_conn;
struct drm_atomic_state *state;
struct drm_device *drm;
struct drm_connector_state *new_conn_state, *old_conn_state;
int ret, initial_modeset_count;
@@ -201,18 +201,17 @@ static void drm_test_check_connector_changed_modeset(struct kunit *test)
drm = &priv->drm;
old_conn = &priv->connectors[0];
new_conn = &priv->connectors[1];
- ctx = drm_kunit_helper_acquire_ctx_alloc(test);
- KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx);
+ drm_modeset_acquire_init(&ctx, 0);
// first modeset to enable
- ret = set_up_atomic_state(test, priv, old_conn, ctx);
+ ret = set_up_atomic_state(test, priv, old_conn, &ctx);
KUNIT_ASSERT_EQ(test, ret, 0);
- state = drm_kunit_helper_atomic_state_alloc(test, drm, ctx);
+ state = drm_kunit_helper_atomic_state_alloc(test, drm, &ctx);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, state);
new_conn_state = drm_atomic_get_connector_state(state, new_conn);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, new_conn_state);
@@ -229,10 +228,13 @@ static void drm_test_check_connector_changed_modeset(struct kunit *test)
// modeset_disables is called as part of the atomic commit tail
ret = drm_atomic_commit(state);
KUNIT_ASSERT_EQ(test, ret, 0);
KUNIT_ASSERT_EQ(test, modeset_counter, initial_modeset_count + 1);
+
+ drm_modeset_drop_locks(&ctx);
+ drm_modeset_acquire_fini(&ctx);
}
/*
* Test that the drm_crtc_in_clone_mode() helper can detect if a given CRTC
* state is in clone mode
@@ -261,27 +263,26 @@ static void drm_test_check_in_clone_mode(struct kunit *test)
static void drm_test_check_valid_clones(struct kunit *test)
{
int ret;
const struct drm_clone_mode_test *param = test->param_value;
struct drm_atomic_test_priv *priv;
- struct drm_modeset_acquire_ctx *ctx;
+ struct drm_modeset_acquire_ctx ctx;
struct drm_device *drm;
struct drm_atomic_state *state;
struct drm_crtc_state *crtc_state;
priv = drm_atomic_test_init_drm_components(test, false);
KUNIT_ASSERT_NOT_NULL(test, priv);
drm = &priv->drm;
- ctx = drm_kunit_helper_acquire_ctx_alloc(test);
- KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx);
+ drm_modeset_acquire_init(&ctx, 0);
- ret = set_up_atomic_state(test, priv, NULL, ctx);
+ ret = set_up_atomic_state(test, priv, NULL, &ctx);
KUNIT_ASSERT_EQ(test, ret, 0);
- state = drm_kunit_helper_atomic_state_alloc(test, drm, ctx);
+ state = drm_kunit_helper_atomic_state_alloc(test, drm, &ctx);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, state);
crtc_state = drm_atomic_get_crtc_state(state, priv->crtc);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, crtc_state);
@@ -290,10 +291,13 @@ static void drm_test_check_valid_clones(struct kunit *test)
// force modeset
crtc_state->mode_changed = true;
ret = drm_atomic_helper_check_modeset(drm, state);
KUNIT_ASSERT_EQ(test, ret, param->expected_result);
+
+ drm_modeset_drop_locks(&ctx);
+ drm_modeset_acquire_fini(&ctx);
}
static void drm_check_in_clone_mode_desc(const struct drm_clone_mode_test *t,
char *desc)
{
diff --git a/drivers/gpu/drm/tests/drm_hdmi_state_helper_test.c b/drivers/gpu/drm/tests/drm_hdmi_state_helper_test.c
index 23ecc00accb2..e97efd3af9ed 100644
--- a/drivers/gpu/drm/tests/drm_hdmi_state_helper_test.c
+++ b/drivers/gpu/drm/tests/drm_hdmi_state_helper_test.c
@@ -271,11 +271,11 @@ drm_kunit_helper_connector_hdmi_init(struct kunit *test,
* in turn disable/enable the connector.
*/
static void drm_test_check_broadcast_rgb_crtc_mode_changed(struct kunit *test)
{
struct drm_atomic_helper_connector_hdmi_priv *priv;
- struct drm_modeset_acquire_ctx *ctx;
+ struct drm_modeset_acquire_ctx ctx;
struct drm_connector_state *old_conn_state;
struct drm_connector_state *new_conn_state;
struct drm_crtc_state *crtc_state;
struct drm_atomic_state *state;
struct drm_display_mode *preferred;
@@ -294,17 +294,16 @@ static void drm_test_check_broadcast_rgb_crtc_mode_changed(struct kunit *test)
conn = &priv->connector;
preferred = find_preferred_mode(conn);
KUNIT_ASSERT_NOT_NULL(test, preferred);
- ctx = drm_kunit_helper_acquire_ctx_alloc(test);
- KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx);
+ drm_modeset_acquire_init(&ctx, 0);
- ret = light_up_connector(test, drm, crtc, conn, preferred, ctx);
+ ret = light_up_connector(test, drm, crtc, conn, preferred, &ctx);
KUNIT_ASSERT_EQ(test, ret, 0);
- state = drm_kunit_helper_atomic_state_alloc(test, drm, ctx);
+ state = drm_kunit_helper_atomic_state_alloc(test, drm, &ctx);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, state);
new_conn_state = drm_atomic_get_connector_state(state, conn);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, new_conn_state);
@@ -325,21 +324,24 @@ static void drm_test_check_broadcast_rgb_crtc_mode_changed(struct kunit *test)
KUNIT_EXPECT_EQ(test, new_conn_state->hdmi.broadcast_rgb, DRM_HDMI_BROADCAST_RGB_FULL);
crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, crtc_state);
KUNIT_EXPECT_TRUE(test, crtc_state->mode_changed);
+
+ drm_modeset_drop_locks(&ctx);
+ drm_modeset_acquire_fini(&ctx);
}
/*
* Test that if we set the RGB quantization property to the same value,
* we don't trigger a mode change on the connector's CRTC and leave the
* connector unaffected.
*/
static void drm_test_check_broadcast_rgb_crtc_mode_not_changed(struct kunit *test)
{
struct drm_atomic_helper_connector_hdmi_priv *priv;
- struct drm_modeset_acquire_ctx *ctx;
+ struct drm_modeset_acquire_ctx ctx;
struct drm_connector_state *old_conn_state;
struct drm_connector_state *new_conn_state;
struct drm_crtc_state *crtc_state;
struct drm_atomic_state *state;
struct drm_display_mode *preferred;
@@ -358,17 +360,16 @@ static void drm_test_check_broadcast_rgb_crtc_mode_not_changed(struct kunit *tes
conn = &priv->connector;
preferred = find_preferred_mode(conn);
KUNIT_ASSERT_NOT_NULL(test, preferred);
- ctx = drm_kunit_helper_acquire_ctx_alloc(test);
- KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx);
+ drm_modeset_acquire_init(&ctx, 0);
- ret = light_up_connector(test, drm, crtc, conn, preferred, ctx);
+ ret = light_up_connector(test, drm, crtc, conn, preferred, &ctx);
KUNIT_ASSERT_EQ(test, ret, 0);
- state = drm_kunit_helper_atomic_state_alloc(test, drm, ctx);
+ state = drm_kunit_helper_atomic_state_alloc(test, drm, &ctx);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, state);
new_conn_state = drm_atomic_get_connector_state(state, conn);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, new_conn_state);
@@ -391,21 +392,24 @@ static void drm_test_check_broadcast_rgb_crtc_mode_not_changed(struct kunit *tes
new_conn_state->hdmi.broadcast_rgb);
crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, crtc_state);
KUNIT_EXPECT_FALSE(test, crtc_state->mode_changed);
+
+ drm_modeset_drop_locks(&ctx);
+ drm_modeset_acquire_fini(&ctx);
}
/*
* Test that for an HDMI connector, with an HDMI monitor, if the
* Broadcast RGB property is set to auto with a mode that isn't the
* VIC-1 mode, we will get a limited RGB Quantization Range.
*/
static void drm_test_check_broadcast_rgb_auto_cea_mode(struct kunit *test)
{
struct drm_atomic_helper_connector_hdmi_priv *priv;
- struct drm_modeset_acquire_ctx *ctx;
+ struct drm_modeset_acquire_ctx ctx;
struct drm_connector_state *conn_state;
struct drm_atomic_state *state;
struct drm_display_mode *preferred;
struct drm_connector *conn;
struct drm_device *drm;
@@ -424,17 +428,16 @@ static void drm_test_check_broadcast_rgb_auto_cea_mode(struct kunit *test)
preferred = find_preferred_mode(conn);
KUNIT_ASSERT_NOT_NULL(test, preferred);
KUNIT_ASSERT_NE(test, drm_match_cea_mode(preferred), 1);
- ctx = drm_kunit_helper_acquire_ctx_alloc(test);
- KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx);
+ drm_modeset_acquire_init(&ctx, 0);
- ret = light_up_connector(test, drm, crtc, conn, preferred, ctx);
+ ret = light_up_connector(test, drm, crtc, conn, preferred, &ctx);
KUNIT_ASSERT_EQ(test, ret, 0);
- state = drm_kunit_helper_atomic_state_alloc(test, drm, ctx);
+ state = drm_kunit_helper_atomic_state_alloc(test, drm, &ctx);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, state);
conn_state = drm_atomic_get_connector_state(state, conn);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, conn_state);
@@ -447,21 +450,24 @@ static void drm_test_check_broadcast_rgb_auto_cea_mode(struct kunit *test)
conn_state = drm_atomic_get_connector_state(state, conn);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, conn_state);
KUNIT_EXPECT_TRUE(test, conn_state->hdmi.is_limited_range);
+
+ drm_modeset_drop_locks(&ctx);
+ drm_modeset_acquire_fini(&ctx);
}
/*
* Test that for an HDMI connector, with an HDMI monitor, if the
* Broadcast RGB property is set to auto with a VIC-1 mode, we will get
* a full RGB Quantization Range.
*/
static void drm_test_check_broadcast_rgb_auto_cea_mode_vic_1(struct kunit *test)
{
struct drm_atomic_helper_connector_hdmi_priv *priv;
- struct drm_modeset_acquire_ctx *ctx;
+ struct drm_modeset_acquire_ctx ctx;
struct drm_connector_state *conn_state;
struct drm_atomic_state *state;
struct drm_display_mode *mode;
struct drm_connector *conn;
struct drm_device *drm;
@@ -475,21 +481,20 @@ static void drm_test_check_broadcast_rgb_auto_cea_mode_vic_1(struct kunit *test)
drm = &priv->drm;
conn = &priv->connector;
KUNIT_ASSERT_TRUE(test, conn->display_info.is_hdmi);
- ctx = drm_kunit_helper_acquire_ctx_alloc(test);
- KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx);
+ drm_modeset_acquire_init(&ctx, 0);
mode = drm_kunit_display_mode_from_cea_vic(test, drm, 1);
KUNIT_ASSERT_NOT_NULL(test, mode);
crtc = priv->crtc;
- ret = light_up_connector(test, drm, crtc, conn, mode, ctx);
+ ret = light_up_connector(test, drm, crtc, conn, mode, &ctx);
KUNIT_ASSERT_EQ(test, ret, 0);
- state = drm_kunit_helper_atomic_state_alloc(test, drm, ctx);
+ state = drm_kunit_helper_atomic_state_alloc(test, drm, &ctx);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, state);
conn_state = drm_atomic_get_connector_state(state, conn);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, conn_state);
@@ -502,21 +507,24 @@ static void drm_test_check_broadcast_rgb_auto_cea_mode_vic_1(struct kunit *test)
conn_state = drm_atomic_get_connector_state(state, conn);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, conn_state);
KUNIT_EXPECT_FALSE(test, conn_state->hdmi.is_limited_range);
+
+ drm_modeset_drop_locks(&ctx);
+ drm_modeset_acquire_fini(&ctx);
}
/*
* Test that for an HDMI connector, with an HDMI monitor, if the
* Broadcast RGB property is set to full with a mode that isn't the
* VIC-1 mode, we will get a full RGB Quantization Range.
*/
static void drm_test_check_broadcast_rgb_full_cea_mode(struct kunit *test)
{
struct drm_atomic_helper_connector_hdmi_priv *priv;
- struct drm_modeset_acquire_ctx *ctx;
+ struct drm_modeset_acquire_ctx ctx;
struct drm_connector_state *conn_state;
struct drm_atomic_state *state;
struct drm_display_mode *preferred;
struct drm_connector *conn;
struct drm_device *drm;
@@ -535,17 +543,16 @@ static void drm_test_check_broadcast_rgb_full_cea_mode(struct kunit *test)
preferred = find_preferred_mode(conn);
KUNIT_ASSERT_NOT_NULL(test, preferred);
KUNIT_ASSERT_NE(test, drm_match_cea_mode(preferred), 1);
- ctx = drm_kunit_helper_acquire_ctx_alloc(test);
- KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx);
+ drm_modeset_acquire_init(&ctx, 0);
- ret = light_up_connector(test, drm, crtc, conn, preferred, ctx);
+ ret = light_up_connector(test, drm, crtc, conn, preferred, &ctx);
KUNIT_ASSERT_EQ(test, ret, 0);
- state = drm_kunit_helper_atomic_state_alloc(test, drm, ctx);
+ state = drm_kunit_helper_atomic_state_alloc(test, drm, &ctx);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, state);
conn_state = drm_atomic_get_connector_state(state, conn);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, conn_state);
@@ -560,21 +567,24 @@ static void drm_test_check_broadcast_rgb_full_cea_mode(struct kunit *test)
KUNIT_ASSERT_EQ(test,
conn_state->hdmi.broadcast_rgb,
DRM_HDMI_BROADCAST_RGB_FULL);
KUNIT_EXPECT_FALSE(test, conn_state->hdmi.is_limited_range);
+
+ drm_modeset_drop_locks(&ctx);
+ drm_modeset_acquire_fini(&ctx);
}
/*
* Test that for an HDMI connector, with an HDMI monitor, if the
* Broadcast RGB property is set to full with a VIC-1 mode, we will get
* a full RGB Quantization Range.
*/
static void drm_test_check_broadcast_rgb_full_cea_mode_vic_1(struct kunit *test)
{
struct drm_atomic_helper_connector_hdmi_priv *priv;
- struct drm_modeset_acquire_ctx *ctx;
+ struct drm_modeset_acquire_ctx ctx;
struct drm_connector_state *conn_state;
struct drm_atomic_state *state;
struct drm_display_mode *mode;
struct drm_connector *conn;
struct drm_device *drm;
@@ -588,21 +598,20 @@ static void drm_test_check_broadcast_rgb_full_cea_mode_vic_1(struct kunit *test)
drm = &priv->drm;
conn = &priv->connector;
KUNIT_ASSERT_TRUE(test, conn->display_info.is_hdmi);
- ctx = drm_kunit_helper_acquire_ctx_alloc(test);
- KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx);
+ drm_modeset_acquire_init(&ctx, 0);
mode = drm_kunit_display_mode_from_cea_vic(test, drm, 1);
KUNIT_ASSERT_NOT_NULL(test, mode);
crtc = priv->crtc;
- ret = light_up_connector(test, drm, crtc, conn, mode, ctx);
+ ret = light_up_connector(test, drm, crtc, conn, mode, &ctx);
KUNIT_ASSERT_EQ(test, ret, 0);
- state = drm_kunit_helper_atomic_state_alloc(test, drm, ctx);
+ state = drm_kunit_helper_atomic_state_alloc(test, drm, &ctx);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, state);
conn_state = drm_atomic_get_connector_state(state, conn);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, conn_state);
@@ -617,21 +626,24 @@ static void drm_test_check_broadcast_rgb_full_cea_mode_vic_1(struct kunit *test)
KUNIT_ASSERT_EQ(test,
conn_state->hdmi.broadcast_rgb,
DRM_HDMI_BROADCAST_RGB_FULL);
KUNIT_EXPECT_FALSE(test, conn_state->hdmi.is_limited_range);
+
+ drm_modeset_drop_locks(&ctx);
+ drm_modeset_acquire_fini(&ctx);
}
/*
* Test that for an HDMI connector, with an HDMI monitor, if the
* Broadcast RGB property is set to limited with a mode that isn't the
* VIC-1 mode, we will get a limited RGB Quantization Range.
*/
static void drm_test_check_broadcast_rgb_limited_cea_mode(struct kunit *test)
{
struct drm_atomic_helper_connector_hdmi_priv *priv;
- struct drm_modeset_acquire_ctx *ctx;
+ struct drm_modeset_acquire_ctx ctx;
struct drm_connector_state *conn_state;
struct drm_atomic_state *state;
struct drm_display_mode *preferred;
struct drm_connector *conn;
struct drm_device *drm;
@@ -650,17 +662,16 @@ static void drm_test_check_broadcast_rgb_limited_cea_mode(struct kunit *test)
preferred = find_preferred_mode(conn);
KUNIT_ASSERT_NOT_NULL(test, preferred);
KUNIT_ASSERT_NE(test, drm_match_cea_mode(preferred), 1);
- ctx = drm_kunit_helper_acquire_ctx_alloc(test);
- KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx);
+ drm_modeset_acquire_init(&ctx, 0);
- ret = light_up_connector(test, drm, crtc, conn, preferred, ctx);
+ ret = light_up_connector(test, drm, crtc, conn, preferred, &ctx);
KUNIT_ASSERT_EQ(test, ret, 0);
- state = drm_kunit_helper_atomic_state_alloc(test, drm, ctx);
+ state = drm_kunit_helper_atomic_state_alloc(test, drm, &ctx);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, state);
conn_state = drm_atomic_get_connector_state(state, conn);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, conn_state);
@@ -675,21 +686,24 @@ static void drm_test_check_broadcast_rgb_limited_cea_mode(struct kunit *test)
KUNIT_ASSERT_EQ(test,
conn_state->hdmi.broadcast_rgb,
DRM_HDMI_BROADCAST_RGB_LIMITED);
KUNIT_EXPECT_TRUE(test, conn_state->hdmi.is_limited_range);
+
+ drm_modeset_drop_locks(&ctx);
+ drm_modeset_acquire_fini(&ctx);
}
/*
* Test that for an HDMI connector, with an HDMI monitor, if the
* Broadcast RGB property is set to limited with a VIC-1 mode, we will
* get a limited RGB Quantization Range.
*/
static void drm_test_check_broadcast_rgb_limited_cea_mode_vic_1(struct kunit *test)
{
struct drm_atomic_helper_connector_hdmi_priv *priv;
- struct drm_modeset_acquire_ctx *ctx;
+ struct drm_modeset_acquire_ctx ctx;
struct drm_connector_state *conn_state;
struct drm_atomic_state *state;
struct drm_display_mode *mode;
struct drm_connector *conn;
struct drm_device *drm;
@@ -703,21 +717,20 @@ static void drm_test_check_broadcast_rgb_limited_cea_mode_vic_1(struct kunit *te
drm = &priv->drm;
conn = &priv->connector;
KUNIT_ASSERT_TRUE(test, conn->display_info.is_hdmi);
- ctx = drm_kunit_helper_acquire_ctx_alloc(test);
- KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx);
+ drm_modeset_acquire_init(&ctx, 0);
mode = drm_kunit_display_mode_from_cea_vic(test, drm, 1);
KUNIT_ASSERT_NOT_NULL(test, mode);
crtc = priv->crtc;
- ret = light_up_connector(test, drm, crtc, conn, mode, ctx);
+ ret = light_up_connector(test, drm, crtc, conn, mode, &ctx);
KUNIT_ASSERT_EQ(test, ret, 0);
- state = drm_kunit_helper_atomic_state_alloc(test, drm, ctx);
+ state = drm_kunit_helper_atomic_state_alloc(test, drm, &ctx);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, state);
conn_state = drm_atomic_get_connector_state(state, conn);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, conn_state);
@@ -732,21 +745,24 @@ static void drm_test_check_broadcast_rgb_limited_cea_mode_vic_1(struct kunit *te
KUNIT_ASSERT_EQ(test,
conn_state->hdmi.broadcast_rgb,
DRM_HDMI_BROADCAST_RGB_LIMITED);
KUNIT_EXPECT_TRUE(test, conn_state->hdmi.is_limited_range);
+
+ drm_modeset_drop_locks(&ctx);
+ drm_modeset_acquire_fini(&ctx);
}
/*
* Test that if we change the maximum bpc property to a different value,
* we trigger a mode change on the connector's CRTC, which will in turn
* disable/enable the connector.
*/
static void drm_test_check_output_bpc_crtc_mode_changed(struct kunit *test)
{
struct drm_atomic_helper_connector_hdmi_priv *priv;
- struct drm_modeset_acquire_ctx *ctx;
+ struct drm_modeset_acquire_ctx ctx;
struct drm_connector_state *old_conn_state;
struct drm_connector_state *new_conn_state;
struct drm_crtc_state *crtc_state;
struct drm_atomic_state *state;
struct drm_display_mode *preferred;
@@ -769,17 +785,16 @@ static void drm_test_check_output_bpc_crtc_mode_changed(struct kunit *test)
KUNIT_ASSERT_GT(test, ret, 0);
preferred = find_preferred_mode(conn);
KUNIT_ASSERT_NOT_NULL(test, preferred);
- ctx = drm_kunit_helper_acquire_ctx_alloc(test);
- KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx);
+ drm_modeset_acquire_init(&ctx, 0);
- ret = light_up_connector(test, drm, crtc, conn, preferred, ctx);
+ ret = light_up_connector(test, drm, crtc, conn, preferred, &ctx);
KUNIT_ASSERT_EQ(test, ret, 0);
- state = drm_kunit_helper_atomic_state_alloc(test, drm, ctx);
+ state = drm_kunit_helper_atomic_state_alloc(test, drm, &ctx);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, state);
new_conn_state = drm_atomic_get_connector_state(state, conn);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, new_conn_state);
@@ -806,21 +821,24 @@ static void drm_test_check_output_bpc_crtc_mode_changed(struct kunit *test)
new_conn_state->hdmi.output_bpc);
crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, crtc_state);
KUNIT_EXPECT_TRUE(test, crtc_state->mode_changed);
+
+ drm_modeset_drop_locks(&ctx);
+ drm_modeset_acquire_fini(&ctx);
}
/*
* Test that if we set the output bpc property to the same value, we
* don't trigger a mode change on the connector's CRTC and leave the
* connector unaffected.
*/
static void drm_test_check_output_bpc_crtc_mode_not_changed(struct kunit *test)
{
struct drm_atomic_helper_connector_hdmi_priv *priv;
- struct drm_modeset_acquire_ctx *ctx;
+ struct drm_modeset_acquire_ctx ctx;
struct drm_connector_state *old_conn_state;
struct drm_connector_state *new_conn_state;
struct drm_crtc_state *crtc_state;
struct drm_atomic_state *state;
struct drm_display_mode *preferred;
@@ -843,17 +861,16 @@ static void drm_test_check_output_bpc_crtc_mode_not_changed(struct kunit *test)
KUNIT_ASSERT_GT(test, ret, 0);
preferred = find_preferred_mode(conn);
KUNIT_ASSERT_NOT_NULL(test, preferred);
- ctx = drm_kunit_helper_acquire_ctx_alloc(test);
- KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx);
+ drm_modeset_acquire_init(&ctx, 0);
- ret = light_up_connector(test, drm, crtc, conn, preferred, ctx);
+ ret = light_up_connector(test, drm, crtc, conn, preferred, &ctx);
KUNIT_ASSERT_EQ(test, ret, 0);
- state = drm_kunit_helper_atomic_state_alloc(test, drm, ctx);
+ state = drm_kunit_helper_atomic_state_alloc(test, drm, &ctx);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, state);
new_conn_state = drm_atomic_get_connector_state(state, conn);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, new_conn_state);
@@ -878,20 +895,23 @@ static void drm_test_check_output_bpc_crtc_mode_not_changed(struct kunit *test)
new_conn_state->hdmi.output_bpc);
crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, crtc_state);
KUNIT_EXPECT_FALSE(test, crtc_state->mode_changed);
+
+ drm_modeset_drop_locks(&ctx);
+ drm_modeset_acquire_fini(&ctx);
}
/*
* Test that if we have an HDMI connector but a !HDMI display, we always
* output RGB with 8 bpc.
*/
static void drm_test_check_output_bpc_dvi(struct kunit *test)
{
struct drm_atomic_helper_connector_hdmi_priv *priv;
- struct drm_modeset_acquire_ctx *ctx;
+ struct drm_modeset_acquire_ctx ctx;
struct drm_connector_state *conn_state;
struct drm_display_info *info;
struct drm_display_mode *preferred;
struct drm_connector *conn;
struct drm_device *drm;
@@ -917,31 +937,33 @@ static void drm_test_check_output_bpc_dvi(struct kunit *test)
KUNIT_ASSERT_FALSE(test, info->is_hdmi);
preferred = find_preferred_mode(conn);
KUNIT_ASSERT_NOT_NULL(test, preferred);
- ctx = drm_kunit_helper_acquire_ctx_alloc(test);
- KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx);
+ drm_modeset_acquire_init(&ctx, 0);
- ret = light_up_connector(test, drm, crtc, conn, preferred, ctx);
+ ret = light_up_connector(test, drm, crtc, conn, preferred, &ctx);
KUNIT_ASSERT_EQ(test, ret, 0);
conn_state = conn->state;
KUNIT_ASSERT_NOT_NULL(test, conn_state);
KUNIT_EXPECT_EQ(test, conn_state->hdmi.output_bpc, 8);
KUNIT_EXPECT_EQ(test, conn_state->hdmi.output_format, HDMI_COLORSPACE_RGB);
+
+ drm_modeset_drop_locks(&ctx);
+ drm_modeset_acquire_fini(&ctx);
}
/*
* Test that when doing a commit which would use RGB 8bpc, the TMDS
* clock rate stored in the connector state is equal to the mode clock
*/
static void drm_test_check_tmds_char_rate_rgb_8bpc(struct kunit *test)
{
struct drm_atomic_helper_connector_hdmi_priv *priv;
- struct drm_modeset_acquire_ctx *ctx;
+ struct drm_modeset_acquire_ctx ctx;
struct drm_connector_state *conn_state;
struct drm_display_mode *preferred;
struct drm_connector *conn;
struct drm_device *drm;
struct drm_crtc *crtc;
@@ -962,33 +984,35 @@ static void drm_test_check_tmds_char_rate_rgb_8bpc(struct kunit *test)
preferred = find_preferred_mode(conn);
KUNIT_ASSERT_NOT_NULL(test, preferred);
KUNIT_ASSERT_FALSE(test, preferred->flags & DRM_MODE_FLAG_DBLCLK);
- ctx = drm_kunit_helper_acquire_ctx_alloc(test);
- KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx);
+ drm_modeset_acquire_init(&ctx, 0);
- ret = light_up_connector(test, drm, crtc, conn, preferred, ctx);
+ ret = light_up_connector(test, drm, crtc, conn, preferred, &ctx);
KUNIT_ASSERT_EQ(test, ret, 0);
conn_state = conn->state;
KUNIT_ASSERT_NOT_NULL(test, conn_state);
KUNIT_ASSERT_EQ(test, conn_state->hdmi.output_bpc, 8);
KUNIT_ASSERT_EQ(test, conn_state->hdmi.output_format, HDMI_COLORSPACE_RGB);
KUNIT_EXPECT_EQ(test, conn_state->hdmi.tmds_char_rate, preferred->clock * 1000);
+
+ drm_modeset_drop_locks(&ctx);
+ drm_modeset_acquire_fini(&ctx);
}
/*
* Test that when doing a commit which would use RGB 10bpc, the TMDS
* clock rate stored in the connector state is equal to 1.25 times the
* mode pixel clock
*/
static void drm_test_check_tmds_char_rate_rgb_10bpc(struct kunit *test)
{
struct drm_atomic_helper_connector_hdmi_priv *priv;
- struct drm_modeset_acquire_ctx *ctx;
+ struct drm_modeset_acquire_ctx ctx;
struct drm_connector_state *conn_state;
struct drm_display_mode *preferred;
struct drm_connector *conn;
struct drm_device *drm;
struct drm_crtc *crtc;
@@ -1009,33 +1033,35 @@ static void drm_test_check_tmds_char_rate_rgb_10bpc(struct kunit *test)
preferred = find_preferred_mode(conn);
KUNIT_ASSERT_NOT_NULL(test, preferred);
KUNIT_ASSERT_FALSE(test, preferred->flags & DRM_MODE_FLAG_DBLCLK);
- ctx = drm_kunit_helper_acquire_ctx_alloc(test);
- KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx);
+ drm_modeset_acquire_init(&ctx, 0);
- ret = light_up_connector(test, drm, crtc, conn, preferred, ctx);
+ ret = light_up_connector(test, drm, crtc, conn, preferred, &ctx);
KUNIT_ASSERT_EQ(test, ret, 0);
conn_state = conn->state;
KUNIT_ASSERT_NOT_NULL(test, conn_state);
KUNIT_ASSERT_EQ(test, conn_state->hdmi.output_bpc, 10);
KUNIT_ASSERT_EQ(test, conn_state->hdmi.output_format, HDMI_COLORSPACE_RGB);
KUNIT_EXPECT_EQ(test, conn_state->hdmi.tmds_char_rate, preferred->clock * 1250);
+
+ drm_modeset_drop_locks(&ctx);
+ drm_modeset_acquire_fini(&ctx);
}
/*
* Test that when doing a commit which would use RGB 12bpc, the TMDS
* clock rate stored in the connector state is equal to 1.5 times the
* mode pixel clock
*/
static void drm_test_check_tmds_char_rate_rgb_12bpc(struct kunit *test)
{
struct drm_atomic_helper_connector_hdmi_priv *priv;
- struct drm_modeset_acquire_ctx *ctx;
+ struct drm_modeset_acquire_ctx ctx;
struct drm_connector_state *conn_state;
struct drm_display_mode *preferred;
struct drm_connector *conn;
struct drm_device *drm;
struct drm_crtc *crtc;
@@ -1056,22 +1082,24 @@ static void drm_test_check_tmds_char_rate_rgb_12bpc(struct kunit *test)
preferred = find_preferred_mode(conn);
KUNIT_ASSERT_NOT_NULL(test, preferred);
KUNIT_ASSERT_FALSE(test, preferred->flags & DRM_MODE_FLAG_DBLCLK);
- ctx = drm_kunit_helper_acquire_ctx_alloc(test);
- KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx);
+ drm_modeset_acquire_init(&ctx, 0);
- ret = light_up_connector(test, drm, crtc, conn, preferred, ctx);
+ ret = light_up_connector(test, drm, crtc, conn, preferred, &ctx);
KUNIT_ASSERT_EQ(test, ret, 0);
conn_state = conn->state;
KUNIT_ASSERT_NOT_NULL(test, conn_state);
KUNIT_ASSERT_EQ(test, conn_state->hdmi.output_bpc, 12);
KUNIT_ASSERT_EQ(test, conn_state->hdmi.output_format, HDMI_COLORSPACE_RGB);
KUNIT_EXPECT_EQ(test, conn_state->hdmi.tmds_char_rate, preferred->clock * 1500);
+
+ drm_modeset_drop_locks(&ctx);
+ drm_modeset_acquire_fini(&ctx);
}
/*
* Test that if we filter a rate through our hook, it's indeed rejected
* by the whole atomic_check logic.
@@ -1081,11 +1109,11 @@ static void drm_test_check_tmds_char_rate_rgb_12bpc(struct kunit *test)
* again to see if it fails as it should.
*/
static void drm_test_check_hdmi_funcs_reject_rate(struct kunit *test)
{
struct drm_atomic_helper_connector_hdmi_priv *priv;
- struct drm_modeset_acquire_ctx *ctx;
+ struct drm_modeset_acquire_ctx ctx;
struct drm_atomic_state *state;
struct drm_display_mode *preferred;
struct drm_crtc_state *crtc_state;
struct drm_connector *conn;
struct drm_device *drm;
@@ -1102,29 +1130,31 @@ static void drm_test_check_hdmi_funcs_reject_rate(struct kunit *test)
conn = &priv->connector;
preferred = find_preferred_mode(conn);
KUNIT_ASSERT_NOT_NULL(test, preferred);
- ctx = drm_kunit_helper_acquire_ctx_alloc(test);
- KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx);
+ drm_modeset_acquire_init(&ctx, 0);
- ret = light_up_connector(test, drm, crtc, conn, preferred, ctx);
+ ret = light_up_connector(test, drm, crtc, conn, preferred, &ctx);
KUNIT_ASSERT_EQ(test, ret, 0);
/* You shouldn't be doing that at home. */
conn->hdmi.funcs = &reject_connector_hdmi_funcs;
- state = drm_kunit_helper_atomic_state_alloc(test, drm, ctx);
+ state = drm_kunit_helper_atomic_state_alloc(test, drm, &ctx);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, state);
crtc_state = drm_atomic_get_crtc_state(state, crtc);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, crtc_state);
crtc_state->connectors_changed = true;
ret = drm_atomic_check_only(state);
KUNIT_EXPECT_LT(test, ret, 0);
+
+ drm_modeset_drop_locks(&ctx);
+ drm_modeset_acquire_fini(&ctx);
}
/*
* Test that if:
* - We have an HDMI connector supporting RGB only
@@ -1137,11 +1167,11 @@ static void drm_test_check_hdmi_funcs_reject_rate(struct kunit *test)
* will be equal to 1.25 times the mode pixel clock.
*/
static void drm_test_check_max_tmds_rate_bpc_fallback(struct kunit *test)
{
struct drm_atomic_helper_connector_hdmi_priv *priv;
- struct drm_modeset_acquire_ctx *ctx;
+ struct drm_modeset_acquire_ctx ctx;
struct drm_connector_state *conn_state;
struct drm_display_info *info;
struct drm_display_mode *preferred;
unsigned long long rate;
struct drm_connector *conn;
@@ -1174,22 +1204,24 @@ static void drm_test_check_max_tmds_rate_bpc_fallback(struct kunit *test)
KUNIT_ASSERT_GT(test, rate, info->max_tmds_clock * 1000);
rate = drm_hdmi_compute_mode_clock(preferred, 10, HDMI_COLORSPACE_RGB);
KUNIT_ASSERT_LT(test, rate, info->max_tmds_clock * 1000);
- ctx = drm_kunit_helper_acquire_ctx_alloc(test);
- KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx);
+ drm_modeset_acquire_init(&ctx, 0);
- ret = light_up_connector(test, drm, crtc, conn, preferred, ctx);
+ ret = light_up_connector(test, drm, crtc, conn, preferred, &ctx);
KUNIT_EXPECT_EQ(test, ret, 0);
conn_state = conn->state;
KUNIT_ASSERT_NOT_NULL(test, conn_state);
KUNIT_EXPECT_EQ(test, conn_state->hdmi.output_bpc, 10);
KUNIT_EXPECT_EQ(test, conn_state->hdmi.output_format, HDMI_COLORSPACE_RGB);
KUNIT_EXPECT_EQ(test, conn_state->hdmi.tmds_char_rate, preferred->clock * 1250);
+
+ drm_modeset_drop_locks(&ctx);
+ drm_modeset_acquire_fini(&ctx);
}
/*
* Test that if:
* - We have an HDMI connector supporting both RGB and YUV422 and up to
@@ -1204,11 +1236,11 @@ static void drm_test_check_max_tmds_rate_bpc_fallback(struct kunit *test)
* picking YUV422.
*/
static void drm_test_check_max_tmds_rate_format_fallback(struct kunit *test)
{
struct drm_atomic_helper_connector_hdmi_priv *priv;
- struct drm_modeset_acquire_ctx *ctx;
+ struct drm_modeset_acquire_ctx ctx;
struct drm_connector_state *conn_state;
struct drm_display_info *info;
struct drm_display_mode *preferred;
unsigned long long rate;
struct drm_connector *conn;
@@ -1246,32 +1278,34 @@ static void drm_test_check_max_tmds_rate_format_fallback(struct kunit *test)
KUNIT_ASSERT_GT(test, rate, info->max_tmds_clock * 1000);
rate = drm_hdmi_compute_mode_clock(preferred, 12, HDMI_COLORSPACE_YUV422);
KUNIT_ASSERT_LT(test, rate, info->max_tmds_clock * 1000);
- ctx = drm_kunit_helper_acquire_ctx_alloc(test);
- KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx);
+ drm_modeset_acquire_init(&ctx, 0);
- ret = light_up_connector(test, drm, crtc, conn, preferred, ctx);
+ ret = light_up_connector(test, drm, crtc, conn, preferred, &ctx);
KUNIT_EXPECT_EQ(test, ret, 0);
conn_state = conn->state;
KUNIT_ASSERT_NOT_NULL(test, conn_state);
KUNIT_EXPECT_EQ(test, conn_state->hdmi.output_bpc, 10);
KUNIT_EXPECT_EQ(test, conn_state->hdmi.output_format, HDMI_COLORSPACE_RGB);
+
+ drm_modeset_drop_locks(&ctx);
+ drm_modeset_acquire_fini(&ctx);
}
/*
* Test that if a driver and screen supports RGB and YUV formats, and we
* try to set the VIC 1 mode, we end up with 8bpc RGB even if we could
* have had a higher bpc.
*/
static void drm_test_check_output_bpc_format_vic_1(struct kunit *test)
{
struct drm_atomic_helper_connector_hdmi_priv *priv;
- struct drm_modeset_acquire_ctx *ctx;
+ struct drm_modeset_acquire_ctx ctx;
struct drm_connector_state *conn_state;
struct drm_display_info *info;
struct drm_display_mode *mode;
unsigned long long rate;
struct drm_connector *conn;
@@ -1308,32 +1342,34 @@ static void drm_test_check_output_bpc_format_vic_1(struct kunit *test)
* Thus, we have to calculate the rate by hand.
*/
rate = mode->clock * 1500;
KUNIT_ASSERT_LT(test, rate, info->max_tmds_clock * 1000);
- ctx = drm_kunit_helper_acquire_ctx_alloc(test);
- KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx);
+ drm_modeset_acquire_init(&ctx, 0);
crtc = priv->crtc;
- ret = light_up_connector(test, drm, crtc, conn, mode, ctx);
+ ret = light_up_connector(test, drm, crtc, conn, mode, &ctx);
KUNIT_EXPECT_EQ(test, ret, 0);
conn_state = conn->state;
KUNIT_ASSERT_NOT_NULL(test, conn_state);
KUNIT_EXPECT_EQ(test, conn_state->hdmi.output_bpc, 8);
KUNIT_EXPECT_EQ(test, conn_state->hdmi.output_format, HDMI_COLORSPACE_RGB);
+
+ drm_modeset_drop_locks(&ctx);
+ drm_modeset_acquire_fini(&ctx);
}
/*
* Test that if a driver supports only RGB but the screen also supports
* YUV formats, we only end up with an RGB format.
*/
static void drm_test_check_output_bpc_format_driver_rgb_only(struct kunit *test)
{
struct drm_atomic_helper_connector_hdmi_priv *priv;
- struct drm_modeset_acquire_ctx *ctx;
+ struct drm_modeset_acquire_ctx ctx;
struct drm_connector_state *conn_state;
struct drm_display_info *info;
struct drm_display_mode *preferred;
unsigned long long rate;
struct drm_connector *conn;
@@ -1374,31 +1410,33 @@ static void drm_test_check_output_bpc_format_driver_rgb_only(struct kunit *test)
KUNIT_ASSERT_GT(test, rate, info->max_tmds_clock * 1000);
rate = drm_hdmi_compute_mode_clock(preferred, 12, HDMI_COLORSPACE_YUV422);
KUNIT_ASSERT_LT(test, rate, info->max_tmds_clock * 1000);
- ctx = drm_kunit_helper_acquire_ctx_alloc(test);
- KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx);
+ drm_modeset_acquire_init(&ctx, 0);
- ret = light_up_connector(test, drm, crtc, conn, preferred, ctx);
+ ret = light_up_connector(test, drm, crtc, conn, preferred, &ctx);
KUNIT_EXPECT_EQ(test, ret, 0);
conn_state = conn->state;
KUNIT_ASSERT_NOT_NULL(test, conn_state);
KUNIT_EXPECT_LT(test, conn_state->hdmi.output_bpc, 12);
KUNIT_EXPECT_EQ(test, conn_state->hdmi.output_format, HDMI_COLORSPACE_RGB);
+
+ drm_modeset_drop_locks(&ctx);
+ drm_modeset_acquire_fini(&ctx);
}
/*
* Test that if a screen supports only RGB but the driver also supports
* YUV formats, we only end up with an RGB format.
*/
static void drm_test_check_output_bpc_format_display_rgb_only(struct kunit *test)
{
struct drm_atomic_helper_connector_hdmi_priv *priv;
- struct drm_modeset_acquire_ctx *ctx;
+ struct drm_modeset_acquire_ctx ctx;
struct drm_connector_state *conn_state;
struct drm_display_info *info;
struct drm_display_mode *preferred;
unsigned long long rate;
struct drm_connector *conn;
@@ -1441,32 +1479,34 @@ static void drm_test_check_output_bpc_format_display_rgb_only(struct kunit *test
KUNIT_ASSERT_GT(test, rate, info->max_tmds_clock * 1000);
rate = drm_hdmi_compute_mode_clock(preferred, 12, HDMI_COLORSPACE_YUV422);
KUNIT_ASSERT_LT(test, rate, info->max_tmds_clock * 1000);
- ctx = drm_kunit_helper_acquire_ctx_alloc(test);
- KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx);
+ drm_modeset_acquire_init(&ctx, 0);
- ret = light_up_connector(test, drm, crtc, conn, preferred, ctx);
+ ret = light_up_connector(test, drm, crtc, conn, preferred, &ctx);
KUNIT_EXPECT_EQ(test, ret, 0);
conn_state = conn->state;
KUNIT_ASSERT_NOT_NULL(test, conn_state);
KUNIT_EXPECT_LT(test, conn_state->hdmi.output_bpc, 12);
KUNIT_EXPECT_EQ(test, conn_state->hdmi.output_format, HDMI_COLORSPACE_RGB);
+
+ drm_modeset_drop_locks(&ctx);
+ drm_modeset_acquire_fini(&ctx);
}
/*
* Test that if a display supports higher bpc but the driver only
* supports 8 bpc, we only end up with 8 bpc even if we could have had a
* higher bpc.
*/
static void drm_test_check_output_bpc_format_driver_8bpc_only(struct kunit *test)
{
struct drm_atomic_helper_connector_hdmi_priv *priv;
- struct drm_modeset_acquire_ctx *ctx;
+ struct drm_modeset_acquire_ctx ctx;
struct drm_connector_state *conn_state;
struct drm_display_info *info;
struct drm_display_mode *preferred;
unsigned long long rate;
struct drm_connector *conn;
@@ -1499,32 +1539,34 @@ static void drm_test_check_output_bpc_format_driver_8bpc_only(struct kunit *test
* clock to actually use 12bpc.
*/
rate = drm_hdmi_compute_mode_clock(preferred, 12, HDMI_COLORSPACE_RGB);
KUNIT_ASSERT_LT(test, rate, info->max_tmds_clock * 1000);
- ctx = drm_kunit_helper_acquire_ctx_alloc(test);
- KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx);
+ drm_modeset_acquire_init(&ctx, 0);
- ret = light_up_connector(test, drm, crtc, conn, preferred, ctx);
+ ret = light_up_connector(test, drm, crtc, conn, preferred, &ctx);
KUNIT_EXPECT_EQ(test, ret, 0);
conn_state = conn->state;
KUNIT_ASSERT_NOT_NULL(test, conn_state);
KUNIT_EXPECT_EQ(test, conn_state->hdmi.output_bpc, 8);
KUNIT_EXPECT_EQ(test, conn_state->hdmi.output_format, HDMI_COLORSPACE_RGB);
+
+ drm_modeset_drop_locks(&ctx);
+ drm_modeset_acquire_fini(&ctx);
}
/*
* Test that if a driver supports higher bpc but the display only
* supports 8 bpc, we only end up with 8 bpc even if we could have had a
* higher bpc.
*/
static void drm_test_check_output_bpc_format_display_8bpc_only(struct kunit *test)
{
struct drm_atomic_helper_connector_hdmi_priv *priv;
- struct drm_modeset_acquire_ctx *ctx;
+ struct drm_modeset_acquire_ctx ctx;
struct drm_connector_state *conn_state;
struct drm_display_info *info;
struct drm_display_mode *preferred;
unsigned long long rate;
struct drm_connector *conn;
@@ -1559,28 +1601,30 @@ static void drm_test_check_output_bpc_format_display_8bpc_only(struct kunit *tes
* clock to actually use 12bpc.
*/
rate = drm_hdmi_compute_mode_clock(preferred, 12, HDMI_COLORSPACE_RGB);
KUNIT_ASSERT_LT(test, rate, info->max_tmds_clock * 1000);
- ctx = drm_kunit_helper_acquire_ctx_alloc(test);
- KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx);
+ drm_modeset_acquire_init(&ctx, 0);
- ret = light_up_connector(test, drm, crtc, conn, preferred, ctx);
+ ret = light_up_connector(test, drm, crtc, conn, preferred, &ctx);
KUNIT_EXPECT_EQ(test, ret, 0);
conn_state = conn->state;
KUNIT_ASSERT_NOT_NULL(test, conn_state);
KUNIT_EXPECT_EQ(test, conn_state->hdmi.output_bpc, 8);
KUNIT_EXPECT_EQ(test, conn_state->hdmi.output_format, HDMI_COLORSPACE_RGB);
+
+ drm_modeset_drop_locks(&ctx);
+ drm_modeset_acquire_fini(&ctx);
}
/* Test that atomic check succeeds when disabling a connector. */
static void drm_test_check_disable_connector(struct kunit *test)
{
struct drm_atomic_helper_connector_hdmi_priv *priv;
- struct drm_modeset_acquire_ctx *ctx;
+ struct drm_modeset_acquire_ctx ctx;
struct drm_connector_state *conn_state;
struct drm_crtc_state *crtc_state;
struct drm_atomic_state *state;
struct drm_display_mode *preferred;
struct drm_connector *conn;
@@ -1591,23 +1635,22 @@ static void drm_test_check_disable_connector(struct kunit *test)
priv = drm_kunit_helper_connector_hdmi_init(test,
BIT(HDMI_COLORSPACE_RGB),
8);
KUNIT_ASSERT_NOT_NULL(test, priv);
- ctx = drm_kunit_helper_acquire_ctx_alloc(test);
- KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx);
+ drm_modeset_acquire_init(&ctx, 0);
conn = &priv->connector;
preferred = find_preferred_mode(conn);
KUNIT_ASSERT_NOT_NULL(test, preferred);
drm = &priv->drm;
crtc = priv->crtc;
- ret = light_up_connector(test, drm, crtc, conn, preferred, ctx);
+ ret = light_up_connector(test, drm, crtc, conn, preferred, &ctx);
KUNIT_ASSERT_EQ(test, ret, 0);
- state = drm_kunit_helper_atomic_state_alloc(test, drm, ctx);
+ state = drm_kunit_helper_atomic_state_alloc(test, drm, &ctx);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, state);
crtc_state = drm_atomic_get_crtc_state(state, crtc);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, crtc_state);
@@ -1621,10 +1664,13 @@ static void drm_test_check_disable_connector(struct kunit *test)
ret = drm_atomic_set_crtc_for_connector(conn_state, NULL);
KUNIT_EXPECT_EQ(test, ret, 0);
ret = drm_atomic_check_only(state);
KUNIT_ASSERT_EQ(test, ret, 0);
+
+ drm_modeset_drop_locks(&ctx);
+ drm_modeset_acquire_fini(&ctx);
}
static struct kunit_case drm_atomic_helper_connector_hdmi_check_tests[] = {
KUNIT_CASE(drm_test_check_broadcast_rgb_auto_cea_mode),
KUNIT_CASE(drm_test_check_broadcast_rgb_auto_cea_mode_vic_1),
diff --git a/drivers/gpu/drm/tests/drm_kunit_helpers.c b/drivers/gpu/drm/tests/drm_kunit_helpers.c
index 3c0b7824c0be..a4eb68f0decc 100644
--- a/drivers/gpu/drm/tests/drm_kunit_helpers.c
+++ b/drivers/gpu/drm/tests/drm_kunit_helpers.c
@@ -78,51 +78,10 @@ __drm_kunit_helper_alloc_drm_device_with_driver(struct kunit *test,
return drm;
}
EXPORT_SYMBOL_GPL(__drm_kunit_helper_alloc_drm_device_with_driver);
-static void action_drm_release_context(void *ptr)
-{
- struct drm_modeset_acquire_ctx *ctx = ptr;
-
- drm_modeset_drop_locks(ctx);
- drm_modeset_acquire_fini(ctx);
-}
-
-/**
- * drm_kunit_helper_acquire_ctx_alloc - Allocates an acquire context
- * @test: The test context object
- *
- * Allocates and initializes a modeset acquire context.
- *
- * The context is tied to the kunit test context, so we must not call
- * drm_modeset_acquire_fini() on it, it will be done so automatically.
- *
- * Returns:
- * An ERR_PTR on error, a pointer to the newly allocated context otherwise
- */
-struct drm_modeset_acquire_ctx *
-drm_kunit_helper_acquire_ctx_alloc(struct kunit *test)
-{
- struct drm_modeset_acquire_ctx *ctx;
- int ret;
-
- ctx = kunit_kzalloc(test, sizeof(*ctx), GFP_KERNEL);
- KUNIT_ASSERT_NOT_NULL(test, ctx);
-
- drm_modeset_acquire_init(ctx, 0);
-
- ret = kunit_add_action_or_reset(test,
- action_drm_release_context,
- ctx);
- if (ret)
- return ERR_PTR(ret);
-
- return ctx;
-}
-EXPORT_SYMBOL_GPL(drm_kunit_helper_acquire_ctx_alloc);
-
static void kunit_action_drm_atomic_state_put(void *ptr)
{
struct drm_atomic_state *state = ptr;
drm_atomic_state_put(state);
diff --git a/drivers/gpu/drm/vc4/tests/vc4_test_pv_muxing.c b/drivers/gpu/drm/vc4/tests/vc4_test_pv_muxing.c
index 40a05869a50e..992e8f5c5c6e 100644
--- a/drivers/gpu/drm/vc4/tests/vc4_test_pv_muxing.c
+++ b/drivers/gpu/drm/vc4/tests/vc4_test_pv_muxing.c
@@ -722,11 +722,11 @@ static void drm_vc4_test_pv_muxing_invalid(struct kunit *test)
}
static int vc4_pv_muxing_test_init(struct kunit *test)
{
const struct pv_muxing_param *params = test->param_value;
- struct drm_modeset_acquire_ctx *ctx;
+ struct drm_modeset_acquire_ctx ctx;
struct pv_muxing_priv *priv;
struct drm_device *drm;
struct vc4_dev *vc4;
priv = kunit_kzalloc(test, sizeof(*priv), GFP_KERNEL);
@@ -735,17 +735,19 @@ static int vc4_pv_muxing_test_init(struct kunit *test)
vc4 = params->mock_fn(test);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, vc4);
priv->vc4 = vc4;
- ctx = drm_kunit_helper_acquire_ctx_alloc(test);
- KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx);
+ drm_modeset_acquire_init(&ctx, 0);
drm = &vc4->base;
- priv->state = drm_kunit_helper_atomic_state_alloc(test, drm, ctx);
+ priv->state = drm_kunit_helper_atomic_state_alloc(test, drm, &ctx);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, priv->state);
+ drm_modeset_drop_locks(&ctx);
+ drm_modeset_acquire_fini(&ctx);
+
return 0;
}
static struct kunit_case vc4_pv_muxing_tests[] = {
KUNIT_CASE_PARAM(drm_vc4_test_pv_muxing,
@@ -780,11 +782,11 @@ static struct kunit_suite vc5_pv_muxing_test_suite = {
* and
* https://lore.kernel.org/dri-devel/20200917121623.42023-1-maxime@cerno.tech/
*/
static void drm_test_vc5_pv_muxing_bugs_subsequent_crtc_enable(struct kunit *test)
{
- struct drm_modeset_acquire_ctx *ctx;
+ struct drm_modeset_acquire_ctx ctx;
struct drm_atomic_state *state;
struct vc4_crtc_state *new_vc4_crtc_state;
struct vc4_hvs_state *new_hvs_state;
unsigned int hdmi0_channel;
unsigned int hdmi1_channel;
@@ -793,15 +795,14 @@ static void drm_test_vc5_pv_muxing_bugs_subsequent_crtc_enable(struct kunit *tes
int ret;
vc4 = vc5_mock_device(test);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, vc4);
- ctx = drm_kunit_helper_acquire_ctx_alloc(test);
- KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx);
+ drm_modeset_acquire_init(&ctx, 0);
drm = &vc4->base;
- state = drm_kunit_helper_atomic_state_alloc(test, drm, ctx);
+ state = drm_kunit_helper_atomic_state_alloc(test, drm, &ctx);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, state);
ret = vc4_mock_atomic_add_output(test, state, VC4_ENCODER_TYPE_HDMI0);
KUNIT_ASSERT_EQ(test, ret, 0);
@@ -820,11 +821,11 @@ static void drm_test_vc5_pv_muxing_bugs_subsequent_crtc_enable(struct kunit *tes
KUNIT_ASSERT_TRUE(test, new_hvs_state->fifo_state[hdmi0_channel].in_use);
ret = drm_atomic_helper_swap_state(state, false);
KUNIT_ASSERT_EQ(test, ret, 0);
- state = drm_kunit_helper_atomic_state_alloc(test, drm, ctx);
+ state = drm_kunit_helper_atomic_state_alloc(test, drm, &ctx);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, state);
ret = vc4_mock_atomic_add_output(test, state, VC4_ENCODER_TYPE_HDMI1);
KUNIT_ASSERT_EQ(test, ret, 0);
@@ -841,10 +842,13 @@ static void drm_test_vc5_pv_muxing_bugs_subsequent_crtc_enable(struct kunit *tes
hdmi1_channel = new_vc4_crtc_state->assigned_channel;
KUNIT_ASSERT_NE(test, hdmi1_channel, VC4_HVS_CHANNEL_DISABLED);
KUNIT_ASSERT_TRUE(test, new_hvs_state->fifo_state[hdmi1_channel].in_use);
KUNIT_EXPECT_NE(test, hdmi0_channel, hdmi1_channel);
+
+ drm_modeset_drop_locks(&ctx);
+ drm_modeset_acquire_fini(&ctx);
}
/*
* This test makes sure that we never change the FIFO of an active HVS
* channel if we disable a FIFO with a lower index.
@@ -852,11 +856,11 @@ static void drm_test_vc5_pv_muxing_bugs_subsequent_crtc_enable(struct kunit *tes
* Doing so would result in a FIFO stall and would disrupt an output
* supposed to be unaffected by the commit.
*/
static void drm_test_vc5_pv_muxing_bugs_stable_fifo(struct kunit *test)
{
- struct drm_modeset_acquire_ctx *ctx;
+ struct drm_modeset_acquire_ctx ctx;
struct drm_atomic_state *state;
struct vc4_crtc_state *new_vc4_crtc_state;
struct vc4_hvs_state *new_hvs_state;
unsigned int old_hdmi0_channel;
unsigned int old_hdmi1_channel;
@@ -865,15 +869,14 @@ static void drm_test_vc5_pv_muxing_bugs_stable_fifo(struct kunit *test)
int ret;
vc4 = vc5_mock_device(test);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, vc4);
- ctx = drm_kunit_helper_acquire_ctx_alloc(test);
- KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx);
+ drm_modeset_acquire_init(&ctx, 0);
drm = &vc4->base;
- state = drm_kunit_helper_atomic_state_alloc(test, drm, ctx);
+ state = drm_kunit_helper_atomic_state_alloc(test, drm, &ctx);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, state);
ret = vc4_mock_atomic_add_output(test, state, VC4_ENCODER_TYPE_HDMI0);
KUNIT_ASSERT_EQ(test, ret, 0);
@@ -903,11 +906,11 @@ static void drm_test_vc5_pv_muxing_bugs_stable_fifo(struct kunit *test)
KUNIT_ASSERT_TRUE(test, new_hvs_state->fifo_state[old_hdmi1_channel].in_use);
ret = drm_atomic_helper_swap_state(state, false);
KUNIT_ASSERT_EQ(test, ret, 0);
- state = drm_kunit_helper_atomic_state_alloc(test, drm, ctx);
+ state = drm_kunit_helper_atomic_state_alloc(test, drm, &ctx);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, state);
ret = vc4_mock_atomic_del_output(test, state, VC4_ENCODER_TYPE_HDMI0);
KUNIT_ASSERT_EQ(test, ret, 0);
@@ -927,10 +930,13 @@ static void drm_test_vc5_pv_muxing_bugs_stable_fifo(struct kunit *test)
KUNIT_ASSERT_NE(test, hdmi1_channel, VC4_HVS_CHANNEL_DISABLED);
KUNIT_ASSERT_TRUE(test, new_hvs_state->fifo_state[hdmi1_channel].in_use);
KUNIT_EXPECT_EQ(test, old_hdmi1_channel, hdmi1_channel);
}
+
+ drm_modeset_drop_locks(&ctx);
+ drm_modeset_acquire_fini(&ctx);
}
/*
* Test that if we affect a single output, only the CRTC state of that
* output will be pulled in the global atomic state.
@@ -947,25 +953,24 @@ static void drm_test_vc5_pv_muxing_bugs_stable_fifo(struct kunit *test)
* inactive CRTC that never completes.
*/
static void
drm_test_vc5_pv_muxing_bugs_subsequent_crtc_enable_too_many_crtc_state(struct kunit *test)
{
- struct drm_modeset_acquire_ctx *ctx;
+ struct drm_modeset_acquire_ctx ctx;
struct drm_atomic_state *state;
struct vc4_crtc_state *new_vc4_crtc_state;
struct drm_device *drm;
struct vc4_dev *vc4;
int ret;
vc4 = vc5_mock_device(test);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, vc4);
- ctx = drm_kunit_helper_acquire_ctx_alloc(test);
- KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx);
+ drm_modeset_acquire_init(&ctx, 0);
drm = &vc4->base;
- state = drm_kunit_helper_atomic_state_alloc(test, drm, ctx);
+ state = drm_kunit_helper_atomic_state_alloc(test, drm, &ctx);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, state);
ret = vc4_mock_atomic_add_output(test, state, VC4_ENCODER_TYPE_HDMI0);
KUNIT_ASSERT_EQ(test, ret, 0);
@@ -973,11 +978,11 @@ drm_test_vc5_pv_muxing_bugs_subsequent_crtc_enable_too_many_crtc_state(struct ku
KUNIT_ASSERT_EQ(test, ret, 0);
ret = drm_atomic_helper_swap_state(state, false);
KUNIT_ASSERT_EQ(test, ret, 0);
- state = drm_kunit_helper_atomic_state_alloc(test, drm, ctx);
+ state = drm_kunit_helper_atomic_state_alloc(test, drm, &ctx);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, state);
ret = vc4_mock_atomic_add_output(test, state, VC4_ENCODER_TYPE_HDMI1);
KUNIT_ASSERT_EQ(test, ret, 0);
@@ -985,10 +990,13 @@ drm_test_vc5_pv_muxing_bugs_subsequent_crtc_enable_too_many_crtc_state(struct ku
KUNIT_ASSERT_EQ(test, ret, 0);
new_vc4_crtc_state = get_vc4_crtc_state_for_encoder(test, state,
VC4_ENCODER_TYPE_HDMI0);
KUNIT_EXPECT_NULL(test, new_vc4_crtc_state);
+
+ drm_modeset_drop_locks(&ctx);
+ drm_modeset_acquire_fini(&ctx);
}
static struct kunit_case vc5_pv_muxing_bugs_tests[] = {
KUNIT_CASE(drm_test_vc5_pv_muxing_bugs_subsequent_crtc_enable),
KUNIT_CASE(drm_test_vc5_pv_muxing_bugs_subsequent_crtc_enable_too_many_crtc_state),
diff --git a/include/drm/drm_kunit_helpers.h b/include/drm/drm_kunit_helpers.h
index afdd46ef04f7..11d59ce0bac0 100644
--- a/include/drm/drm_kunit_helpers.h
+++ b/include/drm/drm_kunit_helpers.h
@@ -93,12 +93,10 @@ __drm_kunit_helper_alloc_drm_device(struct kunit *test,
#define drm_kunit_helper_alloc_drm_device(_test, _dev, _type, _member, _feat) \
((_type *)__drm_kunit_helper_alloc_drm_device(_test, _dev, \
sizeof(_type), \
offsetof(_type, _member), \
_feat))
-struct drm_modeset_acquire_ctx *
-drm_kunit_helper_acquire_ctx_alloc(struct kunit *test);
struct drm_atomic_state *
drm_kunit_helper_atomic_state_alloc(struct kunit *test,
struct drm_device *drm,
struct drm_modeset_acquire_ctx *ctx);
--
2.48.1
5 months, 1 week
- 2
- 3
[PATCH] Documentation: kunit: improve example on testing static functions
by Rae Moar
The documentation on testing static functions using the KUnit macros
VISIBLE_IF_KUNIT and EXPORT_SYMBOL_IF_KUNIT is lacking clarity and
missing key steps in the example. This has caused bugs and confusion
among developers.
Improve wording of description and add missing steps to the example.
This entails adding the "#include <kunit/visibility.h>" line and the
"MODULE_IMPORT_NS(EXPORTED_FOR_KUNIT_TESTING);" line. Both of which were
missing from the original example and key to exposing static functions.
Signed-off-by: Rae Moar <rmoar(a)google.com>
---
Documentation/dev-tools/kunit/usage.rst | 38 +++++++++++++++++++------
1 file changed, 30 insertions(+), 8 deletions(-)
diff --git a/Documentation/dev-tools/kunit/usage.rst b/Documentation/dev-tools/kunit/usage.rst
index 22955d56b379..038f480074fd 100644
--- a/Documentation/dev-tools/kunit/usage.rst
+++ b/Documentation/dev-tools/kunit/usage.rst
@@ -670,28 +670,50 @@ with ``kunit_remove_action``.
Testing Static Functions
------------------------
-If we do not want to expose functions or variables for testing, one option is to
-conditionally export the used symbol. For example:
+If you want to test static functions without exposing those functions outside of
+testing, one option is conditionally export the symbol. When KUnit is enabled,
+the symbol is exposed but remains static otherwise. To use this method, follow
+the template below.
.. code-block:: c
- /* In my_file.c */
+ /* In the file containing functions to test "my_file.c" */
- VISIBLE_IF_KUNIT int do_interesting_thing();
+ #include <kunit/visibility.h>
+ #include <my_file.h>
+ ...
+ VISIBLE_IF_KUNIT int do_interesting_thing()
+ {
+ ...
+ }
EXPORT_SYMBOL_IF_KUNIT(do_interesting_thing);
- /* In my_file.h */
+ /* In the header file "my_file.h" */
#if IS_ENABLED(CONFIG_KUNIT)
int do_interesting_thing(void);
#endif
-Alternatively, you could conditionally ``#include`` the test file at the end of
-your .c file. For example:
+ /* In the KUnit test file "my_file_test.c" */
+
+ #include <kunit/visibility.h>
+ #include <my_file.h>
+ ...
+ MODULE_IMPORT_NS(EXPORTED_FOR_KUNIT_TESTING);
+ ...
+ // Use do_interesting_thing() in tests
+
+For a full example, see this `patch <https://lore.kernel.org/all/20221207014024.340230-3-rmoar@google.com/>`_
+where a test is modified to conditionally expose static functions for testing
+using the macros above.
+
+As an **alternative** to the method above, you could conditionally ``#include``
+the test file at the end of your .c file. This is not recommended but works
+if needed. For example:
.. code-block:: c
- /* In my_file.c */
+ /* In "my_file.c" */
static int do_interesting_thing();
base-commit: c2493384e8110d5a4792fff4b9d46e47b78ea10a
--
2.49.0.1101.gccaa498523-goog
5 months, 1 week
- 3
- 2
[PATCH] kunit: tool: add test counts to JSON output
by Rae Moar
Add the test counts to the JSON output from kunit.py. For example:
...
"git_branch": "kselftest",
"misc":
{
"tests": 2,
"passed": 1.
"failed": 1,
"crashed": 0,
"skipped": 0,
"errors": 0,
}
...
To output the JSON using the following command:
./tools/testing/kunit/kunit.py run example --json
This has been requested by KUnit users. The counts are in a "misc"
field because the JSON output needs to be compliant with the KCIDB
submission guide. There are no counts fields but there is a "misc" field
in the guide.
Signed-off-by: Rae Moar <rmoar(a)google.com>
---
tools/testing/kunit/kunit_json.py | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/tools/testing/kunit/kunit_json.py b/tools/testing/kunit/kunit_json.py
index 10ff65689dd8..80fa4e354a17 100644
--- a/tools/testing/kunit/kunit_json.py
+++ b/tools/testing/kunit/kunit_json.py
@@ -39,10 +39,20 @@ def _get_group_json(test: Test, common_fields: JsonObj) -> JsonObj:
status = _status_map.get(subtest.status, "FAIL")
test_cases.append({"name": subtest.name, "status": status})
+ test_counts = test.counts
+ counts_json = {
+ "tests": test_counts.total(),
+ "passed": test_counts.passed,
+ "failed": test_counts.failed,
+ "crashed": test_counts.crashed,
+ "skipped": test_counts.skipped,
+ "errors": test_counts.errors,
+ }
test_group = {
"name": test.name,
"sub_groups": sub_groups,
"test_cases": test_cases,
+ "misc": counts_json
}
test_group.update(common_fields)
return test_group
base-commit: c2493384e8110d5a4792fff4b9d46e47b78ea10a
--
2.49.0.1101.gccaa498523-goog
5 months, 1 week
- 3
- 2
[PATCH][next] selftests/futex: Fix spelling mistake "unitiliazed" -> "uninitialized"
by Colin Ian King
There is a spelling mistake in a fail error message. Fix it.
Signed-off-by: Colin Ian King <colin.i.king(a)gmail.com>
---
tools/testing/selftests/futex/functional/futex_numa_mpol.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/testing/selftests/futex/functional/futex_numa_mpol.c b/tools/testing/selftests/futex/functional/futex_numa_mpol.c
index dd70532f293e..8864c610f165 100644
--- a/tools/testing/selftests/futex/functional/futex_numa_mpol.c
+++ b/tools/testing/selftests/futex/functional/futex_numa_mpol.c
@@ -181,7 +181,7 @@ int main(int argc, char *argv[])
test_futex(futex_ptr, 0);
if (futex_numa->numa == FUTEX_NO_NODE) {
- fail("NUMA node is left unitiliazed\n");
+ fail("NUMA node is left uninitialized\n");
return 1;
}
--
2.49.0
5 months, 1 week
- 2
- 1
[PATCH] selftests: drv-net: Fix "envirnoments" to "environments"
by Sumanth Gavini
Fix misspelling reported by codespell
Signed-off-by: Sumanth Gavini <sumanth.gavini(a)yahoo.com>
---
tools/testing/selftests/drivers/net/lib/py/env.py | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/testing/selftests/drivers/net/lib/py/env.py b/tools/testing/selftests/drivers/net/lib/py/env.py
index ad5ff645183a..3bccddf8cbc5 100644
--- a/tools/testing/selftests/drivers/net/lib/py/env.py
+++ b/tools/testing/selftests/drivers/net/lib/py/env.py
@@ -12,7 +12,7 @@ from .remote import Remote
class NetDrvEnvBase:
"""
- Base class for a NIC / host envirnoments
+ Base class for a NIC / host environments
Attributes:
test_dir: Path to the source directory of the test
--
2.43.0
5 months, 1 week
- 3
- 2
[PATCH v12 0/5] KVM: selftests: Add LoongArch support
by Bibo Mao
This patchset adds KVM selftests for LoongArch system, currently only
some common test cases are supported and pass to run. These test cases
are listed as following:
coalesced_io_test
demand_paging_test
dirty_log_perf_test
dirty_log_test
guest_print_test
hardware_disable_test
kvm_binary_stats_test
kvm_create_max_vcpus
kvm_page_table_test
memslot_modification_stress_test
memslot_perf_test
set_memory_region_test
---
Changes in v12:
1. Replace vcpu_set_reg() with __vcpu_set_reg() in loongarch_set_csr()
2. Remove duplicated test case including in Makefile.kvm
3. Fix one issue reported by checkpatch
Changes in v11:
1. Fix a typo issue in notes of patch 2, it is kvm_util_arch.h rather than
kvm_util_base.h
Changes in v10:
1. Add PS_64K and remove PS_8K in file include/loongarch/processor.h
2. Fix a typo issue in file lib/loongarch/processor.c
3. Update file MAINTAINERS about LoongArch KVM selftests
Changes in v9:
1. Add vm mode VM_MODE_P47V47_16K, LoongArch VM uses this mode by
default, rather than VM_MODE_P36V47_16K.
2. Refresh some spelling issues in changelog.
Changes in v8:
1. Porting patch based on the latest version.
2. For macro PC_OFFSET_EXREGS, offsetof() method is used for C header file,
still hardcoded definition for assemble language.
Changes in v7:
1. Refine code to add LoongArch support in test case
set_memory_region_test.
Changes in v6:
1. Refresh the patch based on latest kernel 6.8-rc1, add LoongArch
support about testcase set_memory_region_test.
2. Add hardware_disable_test test case.
3. Drop modification about macro DEFAULT_GUEST_TEST_MEM, it is problem
of LoongArch binutils, this issue is raised to LoongArch binutils
owners.
Changes in v5:
1. In LoongArch kvm self tests, the DEFAULT_GUEST_TEST_MEM could be
0x130000000, it is different from the default value in memstress.h.
So we Move the definition of DEFAULT_GUEST_TEST_MEM into LoongArch
ucall.h, and add 'ifndef' condition for DEFAULT_GUEST_TEST_MEM
in memstress.h.
Changes in v4:
1. Remove the based-on flag, as the LoongArch KVM patch series
have been accepted by Linux kernel, so this can be applied directly
in kernel.
Changes in v3:
1. Improve implementation of LoongArch VM page walk.
2. Add exception handler for LoongArch.
3. Add dirty_log_test, dirty_log_perf_test, guest_print_test
test cases for LoongArch.
4. Add __ASSEMBLER__ macro to distinguish asm file and c file.
5. Move ucall_arch_do_ucall to the header file and make it as
static inline to avoid function calls.
6. Change the DEFAULT_GUEST_TEST_MEM base addr for LoongArch.
Changes in v2:
1. We should use ".balign 4096" to align the assemble code with 4K in
exception.S instead of "align 12".
2. LoongArch only supports 3 or 4 levels page tables, so we remove the
hanlders for 2-levels page table.
3. Remove the DEFAULT_LOONGARCH_GUEST_STACK_VADDR_MIN and use the common
DEFAULT_GUEST_STACK_VADDR_MIN to allocate stack memory in guest.
4. Reorganize the test cases supported by LoongArch.
5. Fix some code comments.
6. Add kvm_binary_stats_test test case into LoongArch KVM selftests.
---
Bibo Mao (5):
KVM: selftests: Add VM_MODE_P47V47_16K VM mode
KVM: selftests: Add KVM selftests header files for LoongArch
KVM: selftests: Add core KVM selftests support for LoongArch
KVM: selftests: Add ucall test support for LoongArch
KVM: selftests: Add supported test cases for LoongArch
MAINTAINERS | 2 +
tools/testing/selftests/kvm/Makefile | 2 +-
tools/testing/selftests/kvm/Makefile.kvm | 17 +
.../testing/selftests/kvm/include/kvm_util.h | 6 +
.../kvm/include/loongarch/kvm_util_arch.h | 7 +
.../kvm/include/loongarch/processor.h | 141 +++++++
.../selftests/kvm/include/loongarch/ucall.h | 20 +
tools/testing/selftests/kvm/lib/kvm_util.c | 3 +
.../selftests/kvm/lib/loongarch/exception.S | 59 +++
.../selftests/kvm/lib/loongarch/processor.c | 347 ++++++++++++++++++
.../selftests/kvm/lib/loongarch/ucall.c | 38 ++
.../selftests/kvm/set_memory_region_test.c | 2 +-
12 files changed, 642 insertions(+), 2 deletions(-)
create mode 100644 tools/testing/selftests/kvm/include/loongarch/kvm_util_arch.h
create mode 100644 tools/testing/selftests/kvm/include/loongarch/processor.h
create mode 100644 tools/testing/selftests/kvm/include/loongarch/ucall.h
create mode 100644 tools/testing/selftests/kvm/lib/loongarch/exception.S
create mode 100644 tools/testing/selftests/kvm/lib/loongarch/processor.c
create mode 100644 tools/testing/selftests/kvm/lib/loongarch/ucall.c
base-commit: a5806cd506af5a7c19bcd596e4708b5c464bfd21
--
2.39.3
5 months, 1 week
- 1
- 5
[PATCH net-next v1 0/9] Devmem TCP minor cleanups and ksft improvements
by Mina Almasry
Minor cleanups to the devmem tcp code, and not-so-minor improvements to
the ksft.
For the cleanups:
- Address comment from Paolo post-merge.
- Fix whitespace.
- Add improvement dropped from Taehee's fix patch.
For the ksft:
- Add support for ipv4 environment.
- Add support for drivers that are limited to 5-tuple flow steering.
- Improve test by sending 1K data instead of just "hello\nworld"
Cc: sdf(a)fomichev.me
Cc: ap420073(a)gmail.com
Cc: praan(a)google.com
Cc: shivajikant(a)google.com
Mina Almasry (9):
net: devmem: move list_add to net_devmem_bind_dmabuf.
page_pool: fix ugly page_pool formatting
net: devmem: preserve sockc_err
net: devmem: ksft: remove ksft_disruptive
net: devmem: ksft: add ipv4 support
net: devmem: ksft: add exit_wait to make rx test pass
net: devmem: ksft: add 5 tuple FS support
net: devmem: ksft: upgrade rx test to send 1K data
net: devmem: ncdevmem: remove unused variable
net/core/devmem.c | 5 +-
net/core/devmem.h | 5 +-
net/core/netdev-genl.c | 8 +--
net/core/page_pool.c | 4 +-
net/ipv4/tcp.c | 24 ++++-----
.../selftests/drivers/net/hw/devmem.py | 52 +++++++++++++------
.../selftests/drivers/net/hw/ncdevmem.c | 1 -
7 files changed, 59 insertions(+), 40 deletions(-)
base-commit: b8fa067c4a76e9a28f2003a50ff9b60f00b11168
--
2.49.0.1101.gccaa498523-goog
5 months, 1 week
- 4
- 25
[PATCH] selftests/futex: Fix usage() message to clarify timeout value unit
by Jonathan Velez
futex_wait_timeout: Fix usage() message to clarify timeout value unit
Signed-off-by: Jonathan Velez <jonvelez12345(a)gmail.com>
---
tools/testing/selftests/futex/functional/futex_wait_timeout.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/testing/selftests/futex/functional/futex_wait_timeout.c b/tools/testing/selftests/futex/functional/futex_wait_timeout.c
index d183f878360b..737475df9242 100644
--- a/tools/testing/selftests/futex/functional/futex_wait_timeout.c
+++ b/tools/testing/selftests/futex/functional/futex_wait_timeout.c
@@ -31,7 +31,7 @@ void usage(char *prog)
printf("Usage: %s\n", prog);
printf(" -c Use color\n");
printf(" -h Display this help message\n");
- printf(" -t N Timeout in nanoseconds (default: 100,000)\n");
+ printf(" -t N Set timeout duration in nanoseconds (default: 100,000 ns = 100 us)\n");
printf(" -v L Verbosity level: %d=QUIET %d=CRITICAL %d=INFO\n",
VQUIET, VCRITICAL, VINFO);
}
--
2.43.0
5 months, 1 week
- 2
- 2
Last week to submit your sessions to the Automated Testing Summit!
by Gustavo Padovan
Hello,
It is the last week to submit your proposal!
The Automated Testing Summit (ATS) 2025 will be held as a co-located event at the Open Source Summit North America!
https://events.linuxfoundation.org/open-source-summit-north-america/feature…
📅 Date: June 26, 2025
📍 Location: Denver, CO, USA
Hosted by KernelCI, ATS is a technical summit focused on the challenges of testing and quality assurance in the Linux ecosystem — especially in upstream kernel development, embedded systems, cloud environments, and CI integration.
This is a great opportunity to share your work on:
* Kernel and userspace test frameworks
* Lab infrastructure and automation
* CI/CD pipelines for Linux
* Fuzzing, performance testing, and debugging tools
* Sharing and standardizing test results across systems
Whether you’re working on kernel testing, running tests on hardware labs, developing QA tools, or building infrastructure that scales across projects, ATS is the place to collaborate and move the ecosystem forward.
Submit your talk by May 18, 2025:
👉 Call for Proposals (CFP): https://sessionize.com/atsna2025
We hope to see you in Denver!
— The KernelCI Team
--
Gustavo Padovan
Collabora Ltd.
5 months, 1 week
- 1
- 1
[PATCH v11 0/5] KVM: selftests: Add LoongArch support
by Bibo Mao
This patchset adds KVM selftests for LoongArch system, currently only
some common test cases are supported and pass to run. These test cases
are listed as following:
coalesced_io_test
demand_paging_test
dirty_log_perf_test
dirty_log_test
guest_print_test
hardware_disable_test
kvm_binary_stats_test
kvm_create_max_vcpus
kvm_page_table_test
memslot_modification_stress_test
memslot_perf_test
set_memory_region_test
---
Changes in v11:
1. Fix a typo issue in notes of patch 2, it is kvm_util_arch.h rather than
kvm_util_base.h
Changes in v10:
1. Add PS_64K and remove PS_8K in file include/loongarch/processor.h
2. Fix a typo issue in file lib/loongarch/processor.c
3. Update file MAINTAINERS about LoongArch KVM selftests
Changes in v9:
1. Add vm mode VM_MODE_P47V47_16K, LoongArch VM uses this mode by
default, rather than VM_MODE_P36V47_16K.
2. Refresh some spelling issues in changelog.
Changes in v8:
1. Porting patch based on the latest version.
2. For macro PC_OFFSET_EXREGS, offsetof() method is used for C header file,
still hardcoded definition for assemble language.
Changes in v7:
1. Refine code to add LoongArch support in test case
set_memory_region_test.
Changes in v6:
1. Refresh the patch based on latest kernel 6.8-rc1, add LoongArch
support about testcase set_memory_region_test.
2. Add hardware_disable_test test case.
3. Drop modification about macro DEFAULT_GUEST_TEST_MEM, it is problem
of LoongArch binutils, this issue is raised to LoongArch binutils owners.
Changes in v5:
1. In LoongArch kvm self tests, the DEFAULT_GUEST_TEST_MEM could be
0x130000000, it is different from the default value in memstress.h.
So we Move the definition of DEFAULT_GUEST_TEST_MEM into LoongArch
ucall.h, and add 'ifndef' condition for DEFAULT_GUEST_TEST_MEM
in memstress.h.
Changes in v4:
1. Remove the based-on flag, as the LoongArch KVM patch series
have been accepted by Linux kernel, so this can be applied directly
in kernel.
Changes in v3:
1. Improve implementation of LoongArch VM page walk.
2. Add exception handler for LoongArch.
3. Add dirty_log_test, dirty_log_perf_test, guest_print_test
test cases for LoongArch.
4. Add __ASSEMBLER__ macro to distinguish asm file and c file.
5. Move ucall_arch_do_ucall to the header file and make it as
static inline to avoid function calls.
6. Change the DEFAULT_GUEST_TEST_MEM base addr for LoongArch.
Changes in v2:
1. We should use ".balign 4096" to align the assemble code with 4K in
exception.S instead of "align 12".
2. LoongArch only supports 3 or 4 levels page tables, so we remove the
hanlders for 2-levels page table.
3. Remove the DEFAULT_LOONGARCH_GUEST_STACK_VADDR_MIN and use the common
DEFAULT_GUEST_STACK_VADDR_MIN to allocate stack memory in guest.
4. Reorganize the test cases supported by LoongArch.
5. Fix some code comments.
6. Add kvm_binary_stats_test test case into LoongArch KVM selftests.
---
Bibo Mao (5):
KVM: selftests: Add VM_MODE_P47V47_16K VM mode
KVM: selftests: Add KVM selftests header files for LoongArch
KVM: selftests: Add core KVM selftests support for LoongArch
KVM: selftests: Add ucall test support for LoongArch
KVM: selftests: Add test cases for LoongArch
MAINTAINERS | 2 +
tools/testing/selftests/kvm/Makefile | 2 +-
tools/testing/selftests/kvm/Makefile.kvm | 18 +
.../testing/selftests/kvm/include/kvm_util.h | 6 +
.../kvm/include/loongarch/kvm_util_arch.h | 7 +
.../kvm/include/loongarch/processor.h | 141 ++++++++
.../selftests/kvm/include/loongarch/ucall.h | 20 +
tools/testing/selftests/kvm/lib/kvm_util.c | 3 +
.../selftests/kvm/lib/loongarch/exception.S | 59 +++
.../selftests/kvm/lib/loongarch/processor.c | 342 ++++++++++++++++++
.../selftests/kvm/lib/loongarch/ucall.c | 38 ++
.../selftests/kvm/set_memory_region_test.c | 2 +-
12 files changed, 638 insertions(+), 2 deletions(-)
create mode 100644 tools/testing/selftests/kvm/include/loongarch/kvm_util_arch.h
create mode 100644 tools/testing/selftests/kvm/include/loongarch/processor.h
create mode 100644 tools/testing/selftests/kvm/include/loongarch/ucall.h
create mode 100644 tools/testing/selftests/kvm/lib/loongarch/exception.S
create mode 100644 tools/testing/selftests/kvm/lib/loongarch/processor.c
create mode 100644 tools/testing/selftests/kvm/lib/loongarch/ucall.c
base-commit: 5bc1018675ec28a8a60d83b378d8c3991faa5a27
--
2.39.3
5 months, 1 week
- 2
- 10
[PATCH] selftests: cachestat: fix typo in error message
by Anish Dabhane
Fixes a grammatical error in the output where the word 'to' was missing.
Signed-off-by: Anish Dabhane <anishdabhane71(a)gmail.com>
---
tools/testing/selftests/cachestat/test_cachestat.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/testing/selftests/cachestat/test_cachestat.c b/tools/testing/selftests/cachestat/test_cachestat.c
index 632ab44737ec..1406bc9f2b87 100644
--- a/tools/testing/selftests/cachestat/test_cachestat.c
+++ b/tools/testing/selftests/cachestat/test_cachestat.c
@@ -76,7 +76,7 @@ bool write_exactly(int fd, size_t filesize)
ssize_t write_len = write(fd, cursor, remained);
if (write_len <= 0) {
- ksft_print_msg("Unable write random data to file.\n");
+ ksft_print_msg("Unable to write random data to file.\n");
ret = false;
goto out_free_data;
}
--
2.49.0
5 months, 1 week
- 1
- 0
[PATCH bpf-next v2 00/11] bpf: Mitigate Spectre v1 using barriers
by Luis Gerhorst
This improves the expressiveness of unprivileged BPF by inserting
speculation barriers instead of rejecting the programs.
The approach was previously presented at LPC'24 [1] and RAID'24 [2].
To mitigate the Spectre v1 (PHT) vulnerability, the kernel rejects
potentially-dangerous unprivileged BPF programs as of
commit 9183671af6db ("bpf: Fix leakage under speculation on mispredicted
branches"). In [2], we have analyzed 364 object files from open source
projects (Linux Samples and Selftests, BCC, Loxilb, Cilium, libbpf
Examples, Parca, and Prevail) and found that this affects 31% to 54% of
programs.
To resolve this in the majority of cases this patchset adds a fall-back
for mitigating Spectre v1 using speculation barriers. The kernel still
optimistically attempts to verify all speculative paths but uses
speculation barriers against v1 when unsafe behavior is detected. This
allows for more programs to be accepted without disabling the BPF
Spectre mitigations (e.g., by setting cpu_mitigations_off()).
For this, it relies on the fact that speculation barriers prevent all
later instructions if the speculation was not correct:
* On x86_64, lfence acts as full speculation barrier, not only as a
load fence [3]:
An LFENCE instruction or a serializing instruction will ensure that
no later instructions execute, even speculatively, until all prior
instructions complete locally. [...] Inserting an LFENCE instruction
after a bounds check prevents later operations from executing before
the bound check completes.
This was experimentally confirmed in [4].
* ARM's SB speculation barrier instruction also affects "any instruction
that appears later in the program order than the barrier" [5].
In [1] we have measured the overhead of this approach relative to having
mitigations off and including the upstream Spectre v4 mitigations. For
event tracing and stack-sampling profilers, we found that mitigations
increase BPF program execution time by 0% to 62%. For the Loxilb network
load balancer, we have measured a 14% slowdown in SCTP performance but
no significant slowdown for TCP. This overhead only applies to programs
that were previously rejected.
I reran the expressiveness-evaluation with v6.14 and made sure the main
results still match those from [1] and [2] (which used v6.5).
Main design decisions are:
* Do not use separate bytecode insns for v1 and v4 barriers. This
simplifies the verifier significantly and has the only downside that
performance on PowerPC is not as high as it could be.
* Allow archs to still disable v1/v4 mitigations separately by setting
bpf_jit_bypass_spec_v1/v4(). This has the benefit that archs can
benefit from improved BPF expressiveness / performance if they are not
vulnerable (e.g., ARM64 for v4 in the kernel).
* Do not remove the empty BPF_NOSPEC implementation for backends for
which it is unknown whether they are vulnerable to Spectre v1.
[1] https://lpc.events/event/18/contributions/1954/ ("Mitigating
Spectre-PHT using Speculation Barriers in Linux eBPF")
[2] https://arxiv.org/pdf/2405.00078 ("VeriFence: Lightweight and
Precise Spectre Defenses for Untrusted Linux Kernel Extensions")
[3] https://www.intel.com/content/www/us/en/developer/articles/technical/softwa…
("Managed Runtime Speculative Execution Side Channel Mitigations")
[4] https://dl.acm.org/doi/pdf/10.1145/3359789.3359837 ("Speculator: a
tool to analyze speculative execution attacks and mitigations" -
Section 4.6 "Stopping Speculative Execution")
[5] https://developer.arm.com/documentation/ddi0597/2020-12/Base-Instructions/S…
("SB - Speculation Barrier - Arm Armv8-A A32/T32 Instruction Set Architecture (2020-12)")
Changes:
* v1 -> v2:
- Drop former commits 9 ("bpf: Return PTR_ERR from push_stack()") and 11
("bpf: Fall back to nospec for spec path verification") as suggested
by Alexei. This series therefore no longer changes push_stack() to
return PTR_ERR.
- Add detailed explanation of how lfence works internally and how it
affects the algorithm.
- Add tests checking that nospec instructions are inserted in expected
locations using __xlated_unpriv as suggested by Eduard (also,
include a fix for __xlated_unpriv)
- Add a test for the mitigations from the description of
commit 9183671af6db ("bpf: Fix leakage under speculation on
mispredicted branches")
- Remove unused variables from do_check[_insn]() as suggested by
Eduard.
- Remove INSN_IDX_MODIFIED to improve readability as suggested by
Eduard. This also causes the nospec_result-check to run (and fail)
for jumping-ops. Add a warning to assert that this check must never
succeed in that case.
- Add details on the safety of patch 10 ("bpf: Allow nospec-protected
var-offset stack access") based on the feedback on v1.
- Rebase to bpf-next-250420
- Link to v1: https://lore.kernel.org/all/20250313172127.1098195-1-luis.gerhorst@fau.de/
* RFC -> v1:
- rebase to bpf-next-250313
- tests: mark expected successes/new errors
- add bpt_jit_bypass_spec_v1/v4() to avoid #ifdef in
bpf_bypass_spec_v1/v4()
- ensure that nospec with v1-support is implemented for archs for
which GCC supports speculation barriers, except for MIPS
- arm64: emit speculation barrier
- powerpc: change nospec to include v1 barrier
- discuss potential security (archs that do not impl. BPF nospec) and
performance (only PowerPC) regressions
- Linkt to RFC: https://lore.kernel.org/bpf/20250224203619.594724-1-luis.gerhorst@fau.de/
Luis Gerhorst (11):
selftests/bpf: Fix caps for __xlated/jited_unpriv
bpf: Move insn if/else into do_check_insn()
bpf: Return -EFAULT on misconfigurations
bpf: Return -EFAULT on internal errors
bpf, arm64, powerpc: Add bpf_jit_bypass_spec_v1/v4()
bpf, arm64, powerpc: Change nospec to include v1 barrier
bpf: Rename sanitize_stack_spill to nospec_result
bpf: Fall back to nospec for Spectre v1
selftests/bpf: Add test for Spectre v1 mitigation
bpf: Allow nospec-protected var-offset stack access
bpf: Fall back to nospec for sanitization-failures
arch/arm64/net/bpf_jit.h | 5 +
arch/arm64/net/bpf_jit_comp.c | 28 +-
arch/powerpc/net/bpf_jit_comp64.c | 79 ++-
include/linux/bpf.h | 11 +-
include/linux/bpf_verifier.h | 3 +-
include/linux/filter.h | 2 +-
kernel/bpf/core.c | 32 +-
kernel/bpf/verifier.c | 648 ++++++++++--------
tools/testing/selftests/bpf/progs/bpf_misc.h | 4 +
.../selftests/bpf/progs/verifier_and.c | 8 +-
.../selftests/bpf/progs/verifier_bounds.c | 66 +-
.../bpf/progs/verifier_bounds_deduction.c | 45 +-
.../selftests/bpf/progs/verifier_map_ptr.c | 20 +-
.../selftests/bpf/progs/verifier_movsx.c | 16 +-
.../selftests/bpf/progs/verifier_unpriv.c | 65 +-
.../bpf/progs/verifier_value_ptr_arith.c | 101 ++-
tools/testing/selftests/bpf/test_loader.c | 14 +-
.../selftests/bpf/verifier/dead_code.c | 3 +-
tools/testing/selftests/bpf/verifier/jmp32.c | 33 +-
tools/testing/selftests/bpf/verifier/jset.c | 10 +-
20 files changed, 765 insertions(+), 428 deletions(-)
base-commit: 8582d9ab3efdebb88e0cd8beed8e0b9de76443e7
--
2.49.0
5 months, 1 week
- 2
- 13
[PATCH] selftests: Add functional test for the abort file in fusectl
by Chen Linxuan
This patch add a simple functional test for the "about" file
in fusectlfs (/sys/fs/fuse/connections/ID/about).
A simple fuse daemon is added for testing.
Related discussion can be found in the link below.
Link: https://lore.kernel.org/all/CAOQ4uxjKFXOKQxPpxtS6G_nR0tpw95w0GiO68UcWg_OBhm…
Cc: Amir Goldstein <amir73il(a)gmail.com>
Signed-off-by: Chen Linxuan <chenlinxuan(a)uniontech.com>
---
MAINTAINERS | 1 +
tools/testing/selftests/Makefile | 1 +
.../selftests/filesystems/fusectl/.gitignore | 3 +
.../selftests/filesystems/fusectl/Makefile | 21 +++
.../selftests/filesystems/fusectl/fuse_mnt.c | 146 ++++++++++++++++++
.../filesystems/fusectl/fusectl_test.c | 115 ++++++++++++++
6 files changed, 287 insertions(+)
create mode 100644 tools/testing/selftests/filesystems/fusectl/.gitignore
create mode 100644 tools/testing/selftests/filesystems/fusectl/Makefile
create mode 100644 tools/testing/selftests/filesystems/fusectl/fuse_mnt.c
create mode 100644 tools/testing/selftests/filesystems/fusectl/fusectl_test.c
diff --git a/MAINTAINERS b/MAINTAINERS
index f21f1dabb5fe1..efc6c89113b95 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -9740,6 +9740,7 @@ T: git git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse.git
F: Documentation/filesystems/fuse.rst
F: fs/fuse/
F: include/uapi/linux/fuse.h
+F: tools/testing/selftests/filesystems/fusectl
FUTEX SUBSYSTEM
M: Thomas Gleixner <tglx(a)linutronix.de>
diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index 80fb84fa3cfcb..a9bfefa961889 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -36,6 +36,7 @@ TARGETS += filesystems/fat
TARGETS += filesystems/overlayfs
TARGETS += filesystems/statmount
TARGETS += filesystems/mount-notify
+TARGETS += filesystems/fusectl
TARGETS += firmware
TARGETS += fpu
TARGETS += ftrace
diff --git a/tools/testing/selftests/filesystems/fusectl/.gitignore b/tools/testing/selftests/filesystems/fusectl/.gitignore
new file mode 100644
index 0000000000000..3e72e742d08e8
--- /dev/null
+++ b/tools/testing/selftests/filesystems/fusectl/.gitignore
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
+fuse_mnt
+fusectl_test
diff --git a/tools/testing/selftests/filesystems/fusectl/Makefile b/tools/testing/selftests/filesystems/fusectl/Makefile
new file mode 100644
index 0000000000000..612aad69a93aa
--- /dev/null
+++ b/tools/testing/selftests/filesystems/fusectl/Makefile
@@ -0,0 +1,21 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+CFLAGS += -Wall -O2 -g $(KHDR_INCLUDES)
+
+TEST_GEN_PROGS := fusectl_test
+TEST_GEN_FILES := fuse_mnt
+
+include ../../lib.mk
+
+VAR_CFLAGS := $(shell pkg-config fuse --cflags 2>/dev/null)
+ifeq ($(VAR_CFLAGS),)
+VAR_CFLAGS := -D_FILE_OFFSET_BITS=64 -I/usr/include/fuse
+endif
+
+VAR_LDLIBS := $(shell pkg-config fuse --libs 2>/dev/null)
+ifeq ($(VAR_LDLIBS),)
+VAR_LDLIBS := -lfuse -pthread
+endif
+
+$(OUTPUT)/fuse_mnt: CFLAGS += $(VAR_CFLAGS)
+$(OUTPUT)/fuse_mnt: LDLIBS += $(VAR_LDLIBS)
diff --git a/tools/testing/selftests/filesystems/fusectl/fuse_mnt.c b/tools/testing/selftests/filesystems/fusectl/fuse_mnt.c
new file mode 100644
index 0000000000000..d12b17f30fadc
--- /dev/null
+++ b/tools/testing/selftests/filesystems/fusectl/fuse_mnt.c
@@ -0,0 +1,146 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * fusectl test file-system
+ * Creates a simple FUSE filesystem with a single read-write file (/test)
+ */
+
+#define FUSE_USE_VERSION 26
+
+#include <fuse.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#define MAX(a, b) ((a) > (b) ? (a) : (b))
+
+static char *content;
+static size_t content_size = 0;
+static const char test_path[] = "/test";
+
+static int test_getattr(const char *path, struct stat *st)
+{
+ memset(st, 0, sizeof(*st));
+
+ if (!strcmp(path, "/")) {
+ st->st_mode = S_IFDIR | 0755;
+ st->st_nlink = 2;
+ return 0;
+ }
+
+ if (!strcmp(path, test_path)) {
+ st->st_mode = S_IFREG | 0664;
+ st->st_nlink = 1;
+ st->st_size = content_size;
+ return 0;
+ }
+
+ return -ENOENT;
+}
+
+static int test_readdir(const char *path, void *buf, fuse_fill_dir_t filler,
+ off_t offset, struct fuse_file_info *fi)
+{
+ if (strcmp(path, "/"))
+ return -ENOENT;
+
+ filler(buf, ".", NULL, 0);
+ filler(buf, "..", NULL, 0);
+ filler(buf, test_path + 1, NULL, 0);
+
+ return 0;
+}
+
+static int test_open(const char *path, struct fuse_file_info *fi)
+{
+ if (strcmp(path, test_path))
+ return -ENOENT;
+
+ return 0;
+}
+
+static int test_read(const char *path, char *buf, size_t size, off_t offset,
+ struct fuse_file_info *fi)
+{
+ if (strcmp(path, test_path) != 0)
+ return -ENOENT;
+
+ if (!content || content_size == 0)
+ return 0;
+
+ if (offset >= content_size)
+ return 0;
+
+ if (offset + size > content_size)
+ size = content_size - offset;
+
+ memcpy(buf, content + offset, size);
+
+ return size;
+}
+
+static int test_write(const char *path, const char *buf, size_t size,
+ off_t offset, struct fuse_file_info *fi)
+{
+ size_t new_size;
+
+ if (strcmp(path, test_path) != 0)
+ return -ENOENT;
+
+ if(offset > content_size)
+ return -EINVAL;
+
+ new_size = MAX(offset + size, content_size);
+
+ if (new_size > content_size)
+ content = realloc(content, new_size);
+
+ content_size = new_size;
+
+ if (!content)
+ return -ENOMEM;
+
+ memcpy(content + offset, buf, size);
+
+ return size;
+}
+
+static int test_truncate(const char *path, off_t size)
+{
+ if (strcmp(path, test_path) != 0)
+ return -ENOENT;
+
+ if (size == 0) {
+ free(content);
+ content = NULL;
+ content_size = 0;
+ return 0;
+ }
+
+ content = realloc(content, size);
+
+ if (!content)
+ return -ENOMEM;
+
+ if (size > content_size)
+ memset(content + content_size, 0, size - content_size);
+
+ content_size = size;
+ return 0;
+}
+
+static struct fuse_operations memfd_ops = {
+ .getattr = test_getattr,
+ .readdir = test_readdir,
+ .open = test_open,
+ .read = test_read,
+ .write = test_write,
+ .truncate = test_truncate,
+};
+
+int main(int argc, char *argv[])
+{
+ return fuse_main(argc, argv, &memfd_ops, NULL);
+}
diff --git a/tools/testing/selftests/filesystems/fusectl/fusectl_test.c b/tools/testing/selftests/filesystems/fusectl/fusectl_test.c
new file mode 100644
index 0000000000000..8ff130ae43122
--- /dev/null
+++ b/tools/testing/selftests/filesystems/fusectl/fusectl_test.c
@@ -0,0 +1,115 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+// Copyright (c) 2025 Chen Linxuan <chenlinxuan(a)uniontech.com>
+
+#define _GNU_SOURCE
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/mount.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+#include <dirent.h>
+#include <linux/limits.h>
+
+#include "../../kselftest_harness.h"
+
+#define FUSECTL_MOUNTPOINT "/sys/fs/fuse/connections"
+#define FUSE_MOUNTPOINT "/tmp/fuse_mnt_XXXXXX"
+#define FUSE_DEVICE "/dev/fuse"
+#define FUSECTL_TEST_VALUE "1"
+
+FIXTURE(fusectl){
+ char fuse_mountpoint[sizeof(FUSE_MOUNTPOINT)];
+ int connection;
+};
+
+FIXTURE_SETUP(fusectl)
+{
+ const char *fuse_mnt_prog = "./fuse_mnt";
+ int status, pid;
+ struct stat statbuf;
+
+ strcpy(self->fuse_mountpoint, FUSE_MOUNTPOINT);
+
+ if (!mkdtemp(self->fuse_mountpoint))
+ SKIP(return,
+ "Failed to create FUSE mountpoint %s",
+ strerror(errno));
+
+ if (access(FUSECTL_MOUNTPOINT, F_OK))
+ SKIP(return,
+ "FUSE control filesystem not mounted");
+
+ pid = fork();
+ if (pid < 0)
+ SKIP(return,
+ "Failed to fork FUSE daemon process: %s",
+ strerror(errno));
+
+ if (pid == 0) {
+ execlp(fuse_mnt_prog, fuse_mnt_prog, self->fuse_mountpoint, NULL);
+ exit(errno);
+ }
+
+ waitpid(pid, &status, 0);
+ if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
+ SKIP(return,
+ "Failed to start FUSE daemon %s",
+ strerror(WEXITSTATUS(status)));
+ }
+
+ if (stat(self->fuse_mountpoint, &statbuf))
+ SKIP(return,
+ "Failed to stat FUSE mountpoint %s",
+ strerror(errno));
+
+ self->connection = statbuf.st_dev;
+}
+
+FIXTURE_TEARDOWN(fusectl)
+{
+ umount(self->fuse_mountpoint);
+ rmdir(self->fuse_mountpoint);
+}
+
+TEST_F(fusectl, abort)
+{
+ char path_buf[PATH_MAX];
+ int abort_fd, test_fd, ret;
+
+ sprintf(path_buf, "/sys/fs/fuse/connections/%d/abort", self->connection);
+
+ ASSERT_EQ(0, access(path_buf, F_OK));
+
+ abort_fd = open(path_buf, O_WRONLY);
+ ASSERT_GE(abort_fd, 0);
+
+ sprintf(path_buf, "%s/test", self->fuse_mountpoint);
+
+ test_fd = open(path_buf, O_RDWR);
+ ASSERT_GE(test_fd, 0);
+
+ ret = read(test_fd, path_buf, sizeof(path_buf));
+ ASSERT_EQ(ret, 0);
+
+ ret = write(test_fd, "test", sizeof("test"));
+ ASSERT_EQ(ret, sizeof("test"));
+
+ ret = lseek(test_fd, 0, SEEK_SET);
+ ASSERT_GE(ret, 0);
+
+ ret = write(abort_fd, FUSECTL_TEST_VALUE, sizeof(FUSECTL_TEST_VALUE));
+ ASSERT_GT(ret, 0);
+
+ close(abort_fd);
+
+ ret = read(test_fd, path_buf, sizeof(path_buf));
+ ASSERT_LT(ret, 0);
+}
+
+TEST_HARNESS_MAIN
--
2.43.0
5 months, 1 week
- 2
- 4
[PATCH] selftests/mm: Deduplicate second mmap() of 5*PAGE_SIZE at base
by Mark Brown
The map_fixed_noreplace test does two blocks of test starting from a
mapping of 5 pages at the base address, logging a test result for each
initial mapping. These are logged with the same test name, causing test
automation software to see two reports for the same test in a single run.
Tweak the log message for the second one to deduplicate.
Signed-off-by: Mark Brown <broonie(a)kernel.org>
---
tools/testing/selftests/mm/map_fixed_noreplace.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/testing/selftests/mm/map_fixed_noreplace.c b/tools/testing/selftests/mm/map_fixed_noreplace.c
index d53de2486080..1e9980b8993c 100644
--- a/tools/testing/selftests/mm/map_fixed_noreplace.c
+++ b/tools/testing/selftests/mm/map_fixed_noreplace.c
@@ -96,7 +96,7 @@ int main(void)
ksft_exit_fail_msg("Error:1: mmap() succeeded when it shouldn't have\n");
}
ksft_print_msg("mmap() @ 0x%lx-0x%lx p=%p result=%m\n", addr, addr + size, p);
- ksft_test_result_pass("mmap() 5*PAGE_SIZE at base\n");
+ ksft_test_result_pass("Second mmap() 5*PAGE_SIZE at base\n");
/*
* Second mapping contained within first:
---
base-commit: 82f2b0b97b36ee3fcddf0f0780a9a0825d52fec3
change-id: 20250514-selftests-mm-map-fixed-noreplace-dup-25f83f618bb2
Best regards,
--
Mark Brown <broonie(a)kernel.org>
5 months, 1 week
- 1
- 0
[PATCH] kselftest: x86: Improve MOV SS test result message
by Brigham Campbell
Apparently, this test completes successfully when it completes execution
without either causing a kernel panic or being killed by the kernel.
This new test result message is more descriptive and grammatically
correct.
Signed-off-by: Brigham Campbell <me(a)brighamcampbell.com>
---
tools/testing/selftests/x86/mov_ss_trap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/testing/selftests/x86/mov_ss_trap.c b/tools/testing/selftests/x86/mov_ss_trap.c
index f22cb6b382f9..d80033c0d7eb 100644
--- a/tools/testing/selftests/x86/mov_ss_trap.c
+++ b/tools/testing/selftests/x86/mov_ss_trap.c
@@ -269,6 +269,6 @@ int main()
);
}
- printf("[OK]\tI aten't dead\n");
+ printf("[OK]\tkernel handled MOV SS without crashing test\n");
return 0;
}
--
2.49.0
5 months, 1 week
- 1
- 0
[PATCH] kselftest: dma - fix typo "mininum" -> "minimum" in comment
by Sukrut Heroorkar
Fixes a small typo in a comment; helping to improve clarity in code comment.
Signed-off-by: Sukrut Heroorkar <hsukrut3(a)gmail.com>
---
tools/testing/selftests/dma/dma_map_benchmark.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/testing/selftests/dma/dma_map_benchmark.c b/tools/testing/selftests/dma/dma_map_benchmark.c
index b12f1f9babf8..ed5522061dd6 100644
--- a/tools/testing/selftests/dma/dma_map_benchmark.c
+++ b/tools/testing/selftests/dma/dma_map_benchmark.c
@@ -80,7 +80,7 @@ int main(int argc, char **argv)
exit(1);
}
- /* suppose the mininum DMA zone is 1MB in the world */
+ /* suppose the minimum DMA zone is 1MB in the world */
if (bits < 20 || bits > 64) {
fprintf(stderr, "invalid dma mask bit, must be in 20-64\n");
exit(1);
--
2.43.0
5 months, 1 week
- 1
- 0
[PATCH] docs: msm: fix grammar and spelling in crash dump format
by Suresh K C
From: Suresh K C <suresh.k.chandrappa(a)gmail.com>
Fixes minor grammar and spelling issues in the MSM crash dump documentation:
- Corrected "uinque" to "unique"
- Changed "Set of registers values" to "Set of register values"
These changes improve clarity and maintain consistency with kernel documentation standards.
Signed-off-by: Suresh K C <suresh.k.chandrappa(a)gmail.com>
---
Documentation/gpu/msm-crash-dump.rst | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/Documentation/gpu/msm-crash-dump.rst b/Documentation/gpu/msm-crash-dump.rst
index 9509cc4224f4..6a7a947044ee 100644
--- a/Documentation/gpu/msm-crash-dump.rst
+++ b/Documentation/gpu/msm-crash-dump.rst
@@ -70,7 +70,7 @@ ringbuffer
bo
List of buffers from the hanging submission if available.
- Each buffer object will have a uinque iova.
+ Each buffer object will have a unique iova.
iova
GPU address of the buffer object.
@@ -83,7 +83,7 @@ bo
Trailing zeros at the end of the buffer will be skipped.
registers
- Set of registers values. Each entry is on its own line enclosed
+ Set of register values. Each entry is on its own line enclosed
by brackets { }.
offset
--
2.43.0
5 months, 1 week
- 1
- 0
[PATCH] selftests: rtc: fix grammar for more clarity
by Nidhish Chauhan
Fix some grammar mistake and improve clarity of output messages
and comments in rtctest.c. Fix format of message in accordance to
other output messages in rtctest.c.
Signed-off-by: Nidhish Chauhan <solemnsquire(a)gmail.com>
---
tools/testing/selftests/rtc/rtctest.c | 18 +++++++++---------
1 file changed, 9 insertions(+), 9 deletions(-)
diff --git a/tools/testing/selftests/rtc/rtctest.c b/tools/testing/selftests/rtc/rtctest.c
index be175c0e6ae3..42456dd90095 100644
--- a/tools/testing/selftests/rtc/rtctest.c
+++ b/tools/testing/selftests/rtc/rtctest.c
@@ -138,10 +138,10 @@ TEST_F_TIMEOUT(rtc, date_read_loop, READ_LOOP_DURATION_SEC + 2) {
rtc_read = rtc_time_to_timestamp(&rtc_tm);
/* Time should not go backwards */
ASSERT_LE(prev_rtc_read, rtc_read);
- /* Time should not increase more then 1s at a time */
+ /* Time should not increase by more than 1s at a time */
ASSERT_GE(prev_rtc_read + 1, rtc_read);
- /* Sleep 11ms to avoid killing / overheating the RTC */
+ /* Sleep for 11ms to avoid overloading or overheating the RTC */
nanosleep_with_retries(READ_LOOP_SLEEP_MS * 1000000);
prev_rtc_read = rtc_read;
@@ -163,7 +163,7 @@ TEST_F_TIMEOUT(rtc, uie_read, NUM_UIE + 2) {
rc = ioctl(self->fd, RTC_UIE_ON, 0);
if (rc == -1) {
ASSERT_EQ(EINVAL, errno);
- TH_LOG("skip update IRQs not supported.");
+ TH_LOG("Skipping test since update IRQs are not supported.");
return;
}
@@ -192,7 +192,7 @@ TEST_F(rtc, uie_select) {
rc = ioctl(self->fd, RTC_UIE_ON, 0);
if (rc == -1) {
ASSERT_EQ(EINVAL, errno);
- TH_LOG("skip update IRQs not supported.");
+ TH_LOG("Skipping test since update IRQs are not supported.");
return;
}
@@ -252,7 +252,7 @@ TEST_F(rtc, alarm_alm_set) {
*/
ASSERT_EQ(RTC_ALARM_UNKNOWN, alarm_state);
ASSERT_EQ(EINVAL, errno);
- TH_LOG("skip alarms are not supported.");
+ TH_LOG("Skipping test since alarms are not supported.");
return;
}
@@ -324,7 +324,7 @@ TEST_F(rtc, alarm_wkalm_set) {
*/
ASSERT_EQ(RTC_ALARM_UNKNOWN, alarm_state);
ASSERT_EQ(EINVAL, errno);
- TH_LOG("skip alarms are not supported.");
+ TH_LOG("Skipping test since alarms are not supported.");
return;
}
@@ -384,7 +384,7 @@ TEST_F_TIMEOUT(rtc, alarm_alm_set_minute, 65) {
*/
ASSERT_EQ(RTC_ALARM_UNKNOWN, alarm_state);
ASSERT_EQ(EINVAL, errno);
- TH_LOG("skip alarms are not supported.");
+ TH_LOG("Skipping test since alarms are not supported.");
return;
}
@@ -454,7 +454,7 @@ TEST_F_TIMEOUT(rtc, alarm_wkalm_set_minute, 65) {
*/
ASSERT_EQ(RTC_ALARM_UNKNOWN, alarm_state);
ASSERT_EQ(EINVAL, errno);
- TH_LOG("skip alarms are not supported.");
+ TH_LOG("Skipping test since alarms are not supported.");
return;
}
@@ -494,7 +494,7 @@ int main(int argc, char **argv)
case 1:
break;
default:
- fprintf(stderr, "usage: %s [rtcdev]\n", argv[0]);
+ fprintf(stderr, "Usage: %s [rtcdev]\n", argv[0]);
return 1;
}
--
2.49.0
5 months, 1 week
- 1
- 0
[PATCH] selftests: powerpc: Fix spelling and grammar in PMU test files
by Akshaykumar Gunari
Corrected multiple spelling and grammar issues in the under powerpc PMU
selftests:
- Corrected 'aplicable' -> 'applicable'.
- Corrected 'contraint' -> 'constraint'.
- Corrected 'Incase' -> 'In Case'.
These changes improve documentation quality and maintain code readability.
Signed-off-by: Akshaykumar Gunari <akshaygunari(a)gmail.com>
---
.../pmu/event_code_tests/group_constraint_cache_test.c | 4 ++--
.../pmu/event_code_tests/group_constraint_l2l3_sel_test.c | 6 +++---
.../group_constraint_radix_scope_qual_test.c | 4 ++--
.../event_code_tests/group_constraint_thresh_cmp_test.c | 8 ++++----
.../event_code_tests/group_constraint_thresh_ctl_test.c | 4 ++--
.../event_code_tests/group_constraint_thresh_sel_test.c | 4 ++--
.../pmu/event_code_tests/group_constraint_unit_test.c | 8 ++++----
tools/testing/selftests/powerpc/pmu/sampling_tests/misc.c | 4 ++--
.../powerpc/pmu/sampling_tests/mmcra_bhrb_cond_test.c | 2 +-
.../sampling_tests/mmcra_bhrb_disable_no_branch_test.c | 2 +-
.../powerpc/pmu/sampling_tests/mmcra_bhrb_disable_test.c | 2 +-
.../powerpc/pmu/sampling_tests/mmcra_bhrb_ind_call_test.c | 2 +-
12 files changed, 25 insertions(+), 25 deletions(-)
diff --git a/tools/testing/selftests/powerpc/pmu/event_code_tests/group_constraint_cache_test.c b/tools/testing/selftests/powerpc/pmu/event_code_tests/group_constraint_cache_test.c
index f4be05aa3a3d..855dca7334da 100644
--- a/tools/testing/selftests/powerpc/pmu/event_code_tests/group_constraint_cache_test.c
+++ b/tools/testing/selftests/powerpc/pmu/event_code_tests/group_constraint_cache_test.c
@@ -31,7 +31,7 @@ static int group_constraint_cache(void)
/* Check for platform support for the test */
SKIP_IF(platform_check_for_tests());
- /* Init the events for the group contraint check for l1 cache select bits */
+ /* Init the events for the group constraint check for l1 cache select bits */
event_init(&leader, EventCode_1);
FAIL_IF(event_open(&leader));
@@ -42,7 +42,7 @@ static int group_constraint_cache(void)
event_close(&event);
- /* Init the event for the group contraint l1 cache select test */
+ /* Init the event for the group constraint l1 cache select test */
event_init(&event, EventCode_3);
/* Expected to succeed as sibling event request same l1 cache select bits as leader */
diff --git a/tools/testing/selftests/powerpc/pmu/event_code_tests/group_constraint_l2l3_sel_test.c b/tools/testing/selftests/powerpc/pmu/event_code_tests/group_constraint_l2l3_sel_test.c
index e3c7a0c071e2..9de991d7a767 100644
--- a/tools/testing/selftests/powerpc/pmu/event_code_tests/group_constraint_l2l3_sel_test.c
+++ b/tools/testing/selftests/powerpc/pmu/event_code_tests/group_constraint_l2l3_sel_test.c
@@ -30,12 +30,12 @@ static int group_constraint_l2l3_sel(void)
/*
* Check for platform support for the test.
- * This test is only aplicable on ISA v3.1
+ * This test is only applicable on ISA v3.1
*/
SKIP_IF(platform_check_for_tests());
SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_3_1));
- /* Init the events for the group contraint check for l2l3_sel bits */
+ /* Init the events for the group constraint check for l2l3_sel bits */
event_init(&leader, EventCode_1);
FAIL_IF(event_open(&leader));
@@ -46,7 +46,7 @@ static int group_constraint_l2l3_sel(void)
event_close(&event);
- /* Init the event for the group contraint l2l3_sel test */
+ /* Init the event for the group constraint l2l3_sel test */
event_init(&event, EventCode_3);
/* Expected to succeed as sibling event request same l2l3_sel bits as leader */
diff --git a/tools/testing/selftests/powerpc/pmu/event_code_tests/group_constraint_radix_scope_qual_test.c b/tools/testing/selftests/powerpc/pmu/event_code_tests/group_constraint_radix_scope_qual_test.c
index 9233175787cc..e354129cd7fb 100644
--- a/tools/testing/selftests/powerpc/pmu/event_code_tests/group_constraint_radix_scope_qual_test.c
+++ b/tools/testing/selftests/powerpc/pmu/event_code_tests/group_constraint_radix_scope_qual_test.c
@@ -26,12 +26,12 @@ static int group_constraint_radix_scope_qual(void)
/*
* Check for platform support for the test.
- * This test is aplicable on ISA v3.1 only.
+ * This test is applicable on ISA v3.1 only.
*/
SKIP_IF(platform_check_for_tests());
SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_3_1));
- /* Init the events for the group contraint check for radix_scope_qual bits */
+ /* Init the events for the group constraint check for radix_scope_qual bits */
event_init(&leader, EventCode_1);
FAIL_IF(event_open(&leader));
diff --git a/tools/testing/selftests/powerpc/pmu/event_code_tests/group_constraint_thresh_cmp_test.c b/tools/testing/selftests/powerpc/pmu/event_code_tests/group_constraint_thresh_cmp_test.c
index 4b69e7214c0b..433fa9982c8c 100644
--- a/tools/testing/selftests/powerpc/pmu/event_code_tests/group_constraint_thresh_cmp_test.c
+++ b/tools/testing/selftests/powerpc/pmu/event_code_tests/group_constraint_thresh_cmp_test.c
@@ -37,7 +37,7 @@ static int group_constraint_thresh_cmp(void)
SKIP_IF(platform_check_for_tests());
if (have_hwcap2(PPC_FEATURE2_ARCH_3_1)) {
- /* Init the events for the group contraint check for thresh_cmp bits */
+ /* Init the events for the group constraint check for thresh_cmp bits */
event_init(&leader, p10_EventCode_1);
/* Add the thresh_cmp value for leader in config1 */
@@ -54,7 +54,7 @@ static int group_constraint_thresh_cmp(void)
event_close(&event);
- /* Init the event for the group contraint thresh compare test */
+ /* Init the event for the group constraint thresh compare test */
event_init(&event, p10_EventCode_2);
/* Add the same thresh_cmp value for leader and sibling event in config1 */
@@ -66,7 +66,7 @@ static int group_constraint_thresh_cmp(void)
event_close(&leader);
event_close(&event);
} else {
- /* Init the events for the group contraint check for thresh_cmp bits */
+ /* Init the events for the group constraint check for thresh_cmp bits */
event_init(&leader, p9_EventCode_1);
FAIL_IF(event_open(&leader));
@@ -77,7 +77,7 @@ static int group_constraint_thresh_cmp(void)
event_close(&event);
- /* Init the event for the group contraint thresh compare test */
+ /* Init the event for the group constraint thresh compare test */
event_init(&event, p9_EventCode_3);
/* Expected to succeed as sibling and leader event request same thresh_cmp bits */
diff --git a/tools/testing/selftests/powerpc/pmu/event_code_tests/group_constraint_thresh_ctl_test.c b/tools/testing/selftests/powerpc/pmu/event_code_tests/group_constraint_thresh_ctl_test.c
index e0852ebc1671..7e7206eefcfd 100644
--- a/tools/testing/selftests/powerpc/pmu/event_code_tests/group_constraint_thresh_ctl_test.c
+++ b/tools/testing/selftests/powerpc/pmu/event_code_tests/group_constraint_thresh_ctl_test.c
@@ -35,7 +35,7 @@ static int group_constraint_thresh_ctl(void)
/* Check for platform support for the test */
SKIP_IF(platform_check_for_tests());
- /* Init the events for the group contraint thresh control test */
+ /* Init the events for the group constraint thresh control test */
event_init(&leader, EventCode_1);
FAIL_IF(event_open(&leader));
@@ -46,7 +46,7 @@ static int group_constraint_thresh_ctl(void)
event_close(&event);
- /* Init the event for the group contraint thresh control test */
+ /* Init the event for the group constraint thresh control test */
event_init(&event, EventCode_3);
/* Expected to succeed as sibling and leader event request same thresh_ctl bits */
diff --git a/tools/testing/selftests/powerpc/pmu/event_code_tests/group_constraint_thresh_sel_test.c b/tools/testing/selftests/powerpc/pmu/event_code_tests/group_constraint_thresh_sel_test.c
index 50a8cd843ce7..1b1336c1ddb1 100644
--- a/tools/testing/selftests/powerpc/pmu/event_code_tests/group_constraint_thresh_sel_test.c
+++ b/tools/testing/selftests/powerpc/pmu/event_code_tests/group_constraint_thresh_sel_test.c
@@ -34,7 +34,7 @@ static int group_constraint_thresh_sel(void)
/* Check for platform support for the test */
SKIP_IF(platform_check_for_tests());
- /* Init the events for the group contraint thresh select test */
+ /* Init the events for the group constraint thresh select test */
event_init(&leader, EventCode_1);
FAIL_IF(event_open(&leader));
@@ -45,7 +45,7 @@ static int group_constraint_thresh_sel(void)
event_close(&event);
- /* Init the event for the group contraint thresh select test */
+ /* Init the event for the group constraint thresh select test */
event_init(&event, EventCode_3);
/* Expected to succeed as sibling and leader event request same thresh_sel bits */
diff --git a/tools/testing/selftests/powerpc/pmu/event_code_tests/group_constraint_unit_test.c b/tools/testing/selftests/powerpc/pmu/event_code_tests/group_constraint_unit_test.c
index a2c18923dcec..86684331f2bc 100644
--- a/tools/testing/selftests/powerpc/pmu/event_code_tests/group_constraint_unit_test.c
+++ b/tools/testing/selftests/powerpc/pmu/event_code_tests/group_constraint_unit_test.c
@@ -21,7 +21,7 @@
* Testcase for group constraint check of unit and pmc bits which is
* used to program corresponding unit and pmc field in Monitor Mode
* Control Register 1 (MMCR1)
- * One of the event in the group should use PMC 4 incase units field
+ * One of the event in the group should use PMC 4 in case units field
* value is within 6 to 9 otherwise event_open for the group will fail.
*/
static int group_constraint_unit(void)
@@ -37,21 +37,21 @@ static int group_constraint_unit(void)
SKIP_IF(platform_check_for_tests());
SKIP_IF(have_hwcap2(PPC_FEATURE2_ARCH_3_1));
- /* Init the events for the group contraint check for unit bits */
+ /* Init the events for the group constraint check for unit bits */
e = &events[0];
event_init(e, EventCode_1);
/* Expected to fail as PMC 4 is not used with unit field value 6 to 9 */
FAIL_IF(!event_open(&events[0]));
- /* Init the events for the group contraint check for unit bits */
+ /* Init the events for the group constraint check for unit bits */
e = &events[1];
event_init(e, EventCode_2);
/* Expected to pass as PMC 4 is used with unit field value 6 to 9 */
FAIL_IF(event_open(&events[1]));
- /* Init the event for the group contraint unit test */
+ /* Init the event for the group constraint unit test */
e = &events[2];
event_init(e, EventCode_3);
diff --git a/tools/testing/selftests/powerpc/pmu/sampling_tests/misc.c b/tools/testing/selftests/powerpc/pmu/sampling_tests/misc.c
index 8a538b6182a1..7ec35566790a 100644
--- a/tools/testing/selftests/powerpc/pmu/sampling_tests/misc.c
+++ b/tools/testing/selftests/powerpc/pmu/sampling_tests/misc.c
@@ -466,7 +466,7 @@ int get_thresh_cmp_val(struct event event)
return value;
/*
- * Incase of P10, thresh_cmp value is not part of raw event code
+ * In case of P10, thresh_cmp value is not part of raw event code
* and provided via attr.config1 parameter. To program threshold in MMCRA,
* take a 18 bit number N and shift right 2 places and increment
* the exponent E by 1 until the upper 10 bits of N are zero.
@@ -498,7 +498,7 @@ int get_thresh_cmp_val(struct event event)
* by comparing base_platform value from auxv and real
* PVR value.
* auxv_base_platform() func gives information of "base platform"
- * corresponding to PVR value. Incase, if the distro doesn't
+ * corresponding to PVR value. In case, if the distro doesn't
* support platform PVR (missing cputable support), base platform
* in auxv will have a default value other than the real PVR's.
* In this case, ISAv3 PMU (generic compat PMU) will be registered
diff --git a/tools/testing/selftests/powerpc/pmu/sampling_tests/mmcra_bhrb_cond_test.c b/tools/testing/selftests/powerpc/pmu/sampling_tests/mmcra_bhrb_cond_test.c
index 809de8d58b3b..696f4285af3e 100644
--- a/tools/testing/selftests/powerpc/pmu/sampling_tests/mmcra_bhrb_cond_test.c
+++ b/tools/testing/selftests/powerpc/pmu/sampling_tests/mmcra_bhrb_cond_test.c
@@ -29,7 +29,7 @@ static int mmcra_bhrb_cond_test(void)
/*
* Check for platform support for the test.
- * This test is only aplicable on ISA v3.1
+ * This test is only applicable on ISA v3.1
*/
SKIP_IF(check_pvr_for_sampling_tests());
SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_3_1));
diff --git a/tools/testing/selftests/powerpc/pmu/sampling_tests/mmcra_bhrb_disable_no_branch_test.c b/tools/testing/selftests/powerpc/pmu/sampling_tests/mmcra_bhrb_disable_no_branch_test.c
index fa0dc15f9123..6ed293d18a34 100644
--- a/tools/testing/selftests/powerpc/pmu/sampling_tests/mmcra_bhrb_disable_no_branch_test.c
+++ b/tools/testing/selftests/powerpc/pmu/sampling_tests/mmcra_bhrb_disable_no_branch_test.c
@@ -26,7 +26,7 @@ static int mmcra_bhrb_disable_no_branch_test(void)
/*
* Check for platform support for the test.
- * This test is only aplicable on ISA v3.1
+ * This test is only applicable on ISA v3.1
*/
SKIP_IF(check_pvr_for_sampling_tests());
SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_3_1));
diff --git a/tools/testing/selftests/powerpc/pmu/sampling_tests/mmcra_bhrb_disable_test.c b/tools/testing/selftests/powerpc/pmu/sampling_tests/mmcra_bhrb_disable_test.c
index bc3161ab003d..858e37705275 100644
--- a/tools/testing/selftests/powerpc/pmu/sampling_tests/mmcra_bhrb_disable_test.c
+++ b/tools/testing/selftests/powerpc/pmu/sampling_tests/mmcra_bhrb_disable_test.c
@@ -26,7 +26,7 @@ static int mmcra_bhrb_disable_test(void)
/*
* Check for platform support for the test.
- * This test is only aplicable on ISA v3.1
+ * This test is only applicable on ISA v3.1
*/
SKIP_IF(check_pvr_for_sampling_tests());
SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_3_1));
diff --git a/tools/testing/selftests/powerpc/pmu/sampling_tests/mmcra_bhrb_ind_call_test.c b/tools/testing/selftests/powerpc/pmu/sampling_tests/mmcra_bhrb_ind_call_test.c
index fd6c9f12212c..6ae3edfedd51 100644
--- a/tools/testing/selftests/powerpc/pmu/sampling_tests/mmcra_bhrb_ind_call_test.c
+++ b/tools/testing/selftests/powerpc/pmu/sampling_tests/mmcra_bhrb_ind_call_test.c
@@ -29,7 +29,7 @@ static int mmcra_bhrb_ind_call_test(void)
/*
* Check for platform support for the test.
- * This test is only aplicable on ISA v3.1
+ * This test is only applicable on ISA v3.1
*/
SKIP_IF(check_pvr_for_sampling_tests());
SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_3_1));
--
2.43.0
5 months, 1 week
- 1
- 0
[PATCH] kselftests/x86: Correct grammer in VMX pairing message
by Sukrut Heroorkar
Fixes a small grammatical error in the print message.
signed-off-by: Sukrut Heroorkar <hsukrut3(a)gmail.com>
---
tools/testing/selftests/x86/ioperm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/testing/selftests/x86/ioperm.c b/tools/testing/selftests/x86/ioperm.c
index 69d5fb7050c2..a5099e526912 100644
--- a/tools/testing/selftests/x86/ioperm.c
+++ b/tools/testing/selftests/x86/ioperm.c
@@ -107,7 +107,7 @@ int main(void)
err(1, "fork");
if (child == 0) {
- printf("[RUN]\tchild: check that we inherited permissions\n");
+ printf("[RUN]\tchild: check that if we inherited permissions\n");
expect_ok(0x80);
expect_gp(0xed);
printf("[RUN]\tchild: Extend permissions to 0x81\n");
--
2.43.0
5 months, 1 week
- 2
- 1
[PATCH] selftests/mm: compaction_test: convert comments to preferred style
by George Anthony Vernon
Convert multi-line comments to preferred style with beginning and ending
almost-blank lines.
Signed-off-by: George Anthony Vernon <contact(a)gvernon.com>
---
tools/testing/selftests/mm/compaction_test.c | 22 +++++++++++++-------
1 file changed, 14 insertions(+), 8 deletions(-)
diff --git a/tools/testing/selftests/mm/compaction_test.c b/tools/testing/selftests/mm/compaction_test.c
index 2c3a0eb6b22d..b217ec4a434b 100644
--- a/tools/testing/selftests/mm/compaction_test.c
+++ b/tools/testing/selftests/mm/compaction_test.c
@@ -1,6 +1,5 @@
// SPDX-License-Identifier: GPL-2.0
/*
- *
* A test for the patch "Allow compaction of unevictable pages".
* With this patch we should be able to allocate at least 1/4
* of RAM in huge pages. Without the patch much less is
@@ -94,8 +93,10 @@ int check_compaction(unsigned long mem_free, unsigned long hugepage_size,
snprintf(init_nr_hugepages, sizeof(init_nr_hugepages),
"%lu", initial_nr_hugepages);
- /* We want to test with 80% of available memory. Else, OOM killer comes
- in to play */
+ /*
+ * We want to test with 80% of available memory. Else, OOM killer comes
+ * in to play
+ */
mem_free = mem_free * 0.8;
fd = open("/proc/sys/vm/nr_hugepages", O_RDWR | O_NONBLOCK);
@@ -106,8 +107,10 @@ int check_compaction(unsigned long mem_free, unsigned long hugepage_size,
goto out;
}
- /* Request a large number of huge pages. The Kernel will allocate
- as much as it can */
+ /*
+ * Request a large number of huge pages. The Kernel will allocate
+ * as much as it can
+ */
if (write(fd, "100000", (6*sizeof(char))) != (6*sizeof(char))) {
ksft_print_msg("Failed to write 100000 to /proc/sys/vm/nr_hugepages: %s\n",
strerror(errno));
@@ -122,8 +125,10 @@ int check_compaction(unsigned long mem_free, unsigned long hugepage_size,
goto close_fd;
}
- /* We should have been able to request at least 1/3 rd of the memory in
- huge pages */
+ /*
+ * We should have been able to request at least 1/3 rd of the memory in
+ * huge pages
+ */
nr_hugepages_ul = strtoul(nr_hugepages, NULL, 10);
if (!nr_hugepages_ul) {
ksft_print_msg("ERROR: No memory is available as huge pages\n");
@@ -243,7 +248,8 @@ int main(int argc, char **argv)
entry->next = list;
list = entry;
- /* Write something (in this case the address of the map) to
+ /*
+ * Write something (in this case the address of the map) to
* ensure that KSM can't merge the mapped pages
*/
for (i = 0; i < MAP_SIZE; i += page_size)
--
2.49.0
5 months, 1 week
- 1
- 0
[RFC PATCH v2 00/13] New KVM ioctl to link a gmem inode to a new gmem file
by Ryan Afranji
Hello,
RFC v2 addresses comments in RFC v1 [1]. This series is also rebased
on kvm/next (v6.15-rc4).
Here's the series stitched together for your convenience:
https://github.com/googleprodkernel/linux-cc/tree/kvm-gmem-link-migrate-rfc…
Changes from RFC v1:
+ Adds patches to make guest mem use guest mem inodes instead of
anonymous inodes.
+ Changed the name of factored out gmem allocating function to
kvm_gmem_alloc_view().
+ Changed the flag name vm_move_enc_ctxt_supported to
use_vm_enc_ctxt_op.
+ Various small changes to make patchset compatible with latest version
of kvm/next.
As a refresher, split file/inode model was proposed in guest_mem v11,
where memslot bindings belong to the file and pages belong to the inode.
This model lends itself well to having different VMs use separate files
pointing to the same inode.
The split file/inode model has also been used by the other following
recent patch series:
+ mmap support for guest_memfd: [2]
+ NUMA mempolicy support for guest_memfd: [3]
+ HugeTLB support for guest_memfd: [4]
This RFC proposes an ioctl, KVM_LINK_GUEST_MEMFD, that takes a VM and
a gmem fd, and returns another gmem fd referencing a different file
and associated with VM. This RFC also includes an update to
KVM_CAP_VM_MOVE_ENC_CONTEXT_FROM to migrate memory context
(slot->arch.lpage_info and kvm->mem_attr_array) from source to
destination vm, intra-host.
Intended usage of the two ioctls:
1. Source VM’s fd is passed to destination VM via unix sockets.
2. Destination VM uses new ioctl KVM_LINK_GUEST_MEMFD to link source
VM’s fd to a new fd.
3. Destination VM will pass new fds to KVM_SET_USER_MEMORY_REGION,
which will bind the new file, pointing to the same inode that the
source VM’s file points to, to memslots.
4. Use KVM_CAP_VM_MOVE_ENC_CONTEXT_FROM to move kvm->mem_attr_array
and slot->arch.lpage_info to the destination VM.
5. Run the destination VM as per normal.
Some other approaches considered were:
+ Using the linkat() syscall, but that requires a mount/directory for
a source fd to be linked to
+ Using the dup() syscall, but that only duplicates the fd, and both
fds point to the same file
[1] https://lore.kernel.org/all/cover.1691446946.git.ackerleytng@google.com/T/
[2] https://lore.kernel.org/all/20250328153133.3504118-2-tabba@google.com/
[3] https://lore.kernel.org/all/20250408112402.181574-6-shivankg@amd.com/
[4] https://lore.kernel.org/all/c1ee659c212b5a8b0e7a7f4d1763699176dd3a62.174726…
---
Ackerley Tng (12):
KVM: guest_memfd: Make guest mem use guest mem inodes instead of
anonymous inodes
KVM: guest_mem: Refactor out kvm_gmem_alloc_view()
KVM: guest_mem: Add ioctl KVM_LINK_GUEST_MEMFD
KVM: selftests: Add tests for KVM_LINK_GUEST_MEMFD ioctl
KVM: selftests: Test transferring private memory to another VM
KVM: x86: Refactor sev's flag migration_in_progress to kvm struct
KVM: x86: Refactor common code out of sev.c
KVM: x86: Refactor common migration preparation code out of
sev_vm_move_enc_context_from
KVM: x86: Let moving encryption context be configurable
KVM: x86: Handle moving of memory context for intra-host migration
KVM: selftests: Generalize migration functions from
sev_migrate_tests.c
KVM: selftests: Add tests for migration of private mem
David Hildenbrand (1):
fs: Refactor to provide function that allocates a secure anonymous
inode
arch/x86/include/asm/kvm_host.h | 3 +-
arch/x86/kvm/svm/sev.c | 82 +------
arch/x86/kvm/svm/svm.h | 3 +-
arch/x86/kvm/x86.c | 218 ++++++++++++++++-
arch/x86/kvm/x86.h | 6 +
fs/anon_inodes.c | 23 +-
include/linux/fs.h | 13 +-
include/linux/kvm_host.h | 18 ++
include/uapi/linux/kvm.h | 8 +
include/uapi/linux/magic.h | 1 +
mm/secretmem.c | 9 +-
tools/testing/selftests/kvm/Makefile.kvm | 1 +
.../testing/selftests/kvm/guest_memfd_test.c | 43 ++++
.../testing/selftests/kvm/include/kvm_util.h | 31 +++
.../kvm/x86/private_mem_migrate_tests.c | 93 ++++++++
.../selftests/kvm/x86/sev_migrate_tests.c | 48 ++--
virt/kvm/guest_memfd.c | 225 +++++++++++++++---
virt/kvm/kvm_main.c | 17 +-
virt/kvm/kvm_mm.h | 14 +-
19 files changed, 697 insertions(+), 159 deletions(-)
create mode 100644 tools/testing/selftests/kvm/x86/private_mem_migrate_tests.c
--
2.49.0.1101.gccaa498523-goog
5 months, 1 week
- 1
- 13
[PATCH net] selftests: net: validate team flags propagation
by Stanislav Fomichev
Cover three recent cases:
1. missing ops locking for the lowers during netdev_sync_lower_features
2. missing locking for dev_set_promiscuity (plus netdev_ops_assert_locked
with a comment on why/when it's needed)
3. rcu lock during team_change_rx_flags
Verified that each one triggers when the respective fix is reverted.
Not sure about the placement, but since it all relies on teaming,
added to the teaming directory.
One ugly bit is that I add NETIF_F_LRO to netdevsim; there is no way
to trigger netdev_sync_lower_features without it.
Signed-off-by: Stanislav Fomichev <stfomichev(a)gmail.com>
---
drivers/net/netdevsim/netdev.c | 2 +
net/core/dev.c | 10 ++-
.../selftests/drivers/net/team/Makefile | 2 +-
.../testing/selftests/drivers/net/team/config | 1 +
.../selftests/drivers/net/team/propagation.sh | 79 +++++++++++++++++++
5 files changed, 92 insertions(+), 2 deletions(-)
create mode 100755 tools/testing/selftests/drivers/net/team/propagation.sh
diff --git a/drivers/net/netdevsim/netdev.c b/drivers/net/netdevsim/netdev.c
index 0e0321a7ddd7..3bd1f8cffee8 100644
--- a/drivers/net/netdevsim/netdev.c
+++ b/drivers/net/netdevsim/netdev.c
@@ -879,11 +879,13 @@ static void nsim_setup(struct net_device *dev)
NETIF_F_SG |
NETIF_F_FRAGLIST |
NETIF_F_HW_CSUM |
+ NETIF_F_LRO |
NETIF_F_TSO;
dev->hw_features |= NETIF_F_HW_TC |
NETIF_F_SG |
NETIF_F_FRAGLIST |
NETIF_F_HW_CSUM |
+ NETIF_F_LRO |
NETIF_F_TSO;
dev->max_mtu = ETH_MAX_MTU;
dev->xdp_features = NETDEV_XDP_ACT_HW_OFFLOAD;
diff --git a/net/core/dev.c b/net/core/dev.c
index 0d891634c692..4debd4b8e0f5 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -9188,8 +9188,16 @@ static int __dev_set_promiscuity(struct net_device *dev, int inc, bool notify)
dev_change_rx_flags(dev, IFF_PROMISC);
}
- if (notify)
+ if (notify) {
+ /* The ops lock is only required to ensure consistent locking
+ * for `NETDEV_CHANGE` notifiers. This function is sometimes
+ * called without the lock, even for devices that are ops
+ * locked, such as in `dev_uc_sync_multiple` when using
+ * bonding or teaming.
+ */
+ netdev_ops_assert_locked(dev);
__dev_notify_flags(dev, old_flags, IFF_PROMISC, 0, NULL);
+ }
return 0;
}
diff --git a/tools/testing/selftests/drivers/net/team/Makefile b/tools/testing/selftests/drivers/net/team/Makefile
index 2d5a76d99181..eaf6938f100e 100644
--- a/tools/testing/selftests/drivers/net/team/Makefile
+++ b/tools/testing/selftests/drivers/net/team/Makefile
@@ -1,7 +1,7 @@
# SPDX-License-Identifier: GPL-2.0
# Makefile for net selftests
-TEST_PROGS := dev_addr_lists.sh
+TEST_PROGS := dev_addr_lists.sh propagation.sh
TEST_INCLUDES := \
../bonding/lag_lib.sh \
diff --git a/tools/testing/selftests/drivers/net/team/config b/tools/testing/selftests/drivers/net/team/config
index b5e3a3aad4bf..636b3525b679 100644
--- a/tools/testing/selftests/drivers/net/team/config
+++ b/tools/testing/selftests/drivers/net/team/config
@@ -1,5 +1,6 @@
CONFIG_DUMMY=y
CONFIG_IPV6=y
CONFIG_MACVLAN=y
+CONFIG_NETDEVSIM=m
CONFIG_NET_TEAM=y
CONFIG_NET_TEAM_MODE_LOADBALANCE=y
diff --git a/tools/testing/selftests/drivers/net/team/propagation.sh b/tools/testing/selftests/drivers/net/team/propagation.sh
new file mode 100755
index 000000000000..849a5f2cb3a7
--- /dev/null
+++ b/tools/testing/selftests/drivers/net/team/propagation.sh
@@ -0,0 +1,79 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+
+set -e
+
+NSIM_LRO_ID=$((256 + RANDOM % 256))
+NSIM_LRO_SYS=/sys/bus/netdevsim/devices/netdevsim$NSIM_LRO_ID
+
+NSIM_DEV_SYS_NEW=/sys/bus/netdevsim/new_device
+NSIM_DEV_SYS_DEL=/sys/bus/netdevsim/del_device
+
+cleanup()
+{
+ ip link del dummyteam &>/dev/null
+ ip link del team0 &>/dev/null
+ echo $NSIM_LRO_ID > $NSIM_DEV_SYS_DEL
+}
+
+# Trigger LRO propagation to the lower.
+# https://lore.kernel.org/netdev/aBvOpkIoxcr9PfDg@mini-arch/
+team_lro()
+{
+ # using netdevsim because it supports NETIF_F_LRO
+ NSIM_LRO_NAME=$(find $NSIM_LRO_SYS/net -maxdepth 1 -type d ! \
+ -path $NSIM_LRO_SYS/net -exec basename {} \;)
+
+ ip link add name team0 type team
+ ip link set $NSIM_LRO_NAME down
+ ip link set dev $NSIM_LRO_NAME master team0
+ ip link set team0 up
+ ethtool -K team0 large-receive-offload off
+
+ ip link del team0
+}
+
+# Trigger promisc propagation to the lower during IFLA_MASTER.
+# https://lore.kernel.org/netdev/20250506032328.3003050-1-sdf@fomichev.me/
+team_promisc()
+{
+ ip link add name dummyteam type dummy
+ ip link add name team0 type team
+ ip link set dummyteam down
+ ip link set team0 promisc on
+ ip link set dev dummyteam master team0
+ ip link set team0 up
+
+ ip link del team0
+ ip link del dummyteam
+}
+
+# Trigger promisc propagation to the lower via netif_change_flags (aka
+# ndo_change_rx_flags).
+# https://lore.kernel.org/netdev/20250514220319.3505158-1-stfomichev@gmail.co…
+team_change_flags()
+{
+ ip link add name dummyteam type dummy
+ ip link add name team0 type team
+ ip link set dummyteam down
+ ip link set dev dummyteam master team0
+ ip link set team0 up
+ ip link set team0 promisc on
+
+ # Make sure we can add more L2 addresses without any issues.
+ ip link add link team0 address 00:00:00:00:00:01 team0.1 type macvlan
+ ip link set team0.1 up
+
+ ip link del team0.1
+ ip link del team0
+ ip link del dummyteam
+}
+
+trap cleanup EXIT
+modprobe netdevsim || :
+echo $NSIM_LRO_ID > $NSIM_DEV_SYS_NEW
+udevadm settle
+team_lro
+team_promisc
+team_change_flags
+modprobe -r netdevsim || :
--
2.49.0
5 months, 1 week
- 2
- 2
[PATCH] kselftest/arm64: Set default OUTPUT path when undefined
by tanze
When running 'make' in tools/testing/selftests/arm64/ without explicitly
setting the OUTPUT variable, the build system will creates test
directories (e.g., /bti) in the root filesystem due to OUTPUT defaulting
to an empty string. This causes unintended pollution of the root directory.
This patch adds proper handling for the OUTPUT variable: Sets OUTPUT
to the current directory (.) if not specified
Signed-off-by: tanze <tanze(a)kylinos.cn>
---
tools/testing/selftests/arm64/Makefile | 2 ++
1 file changed, 2 insertions(+)
diff --git a/tools/testing/selftests/arm64/Makefile b/tools/testing/selftests/arm64/Makefile
index 22029e60eff3..c4c72ee2ef55 100644
--- a/tools/testing/selftests/arm64/Makefile
+++ b/tools/testing/selftests/arm64/Makefile
@@ -21,6 +21,8 @@ CFLAGS += $(KHDR_INCLUDES)
CFLAGS += -I$(top_srcdir)/tools/include
+OUTPUT ?= $(CURDIR)
+
export CFLAGS
export top_srcdir
--
2.25.1
5 months, 1 week
- 2
- 1
[PATCH v5 25/25] tracing: selftests: Add pKVM trace remote tests
by Vincent Donnefort
Run the trace remote selftests with the pKVM trace remote "hypervisor".
Cc: Shuah Khan <skhan(a)linuxfoundation.org>
Cc: linux-kselftest(a)vger.kernel.org
Signed-off-by: Vincent Donnefort <vdonnefort(a)google.com>
diff --git a/tools/testing/selftests/ftrace/test.d/remotes/pkvm/buffer_size.tc b/tools/testing/selftests/ftrace/test.d/remotes/pkvm/buffer_size.tc
new file mode 100644
index 000000000000..383ef7a84274
--- /dev/null
+++ b/tools/testing/selftests/ftrace/test.d/remotes/pkvm/buffer_size.tc
@@ -0,0 +1,10 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# description: Test pkvm hypervisor tracing buffer size
+
+SOURCE_REMOTE_TEST=1
+. $TEST_DIR/remotes/buffer_size.tc
+
+set -e
+setup_remote "hypervisor"
+test_buffer_size
diff --git a/tools/testing/selftests/ftrace/test.d/remotes/pkvm/reset.tc b/tools/testing/selftests/ftrace/test.d/remotes/pkvm/reset.tc
new file mode 100644
index 000000000000..679e31257d0b
--- /dev/null
+++ b/tools/testing/selftests/ftrace/test.d/remotes/pkvm/reset.tc
@@ -0,0 +1,10 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# description: Test pkvm hypervisor tracing reset
+
+SOURCE_REMOTE_TEST=1
+. $TEST_DIR/remotes/reset.tc
+
+set -e
+setup_remote "hypervisor"
+test_reset
diff --git a/tools/testing/selftests/ftrace/test.d/remotes/pkvm/trace_pipe.tc b/tools/testing/selftests/ftrace/test.d/remotes/pkvm/trace_pipe.tc
new file mode 100644
index 000000000000..4c77431e884f
--- /dev/null
+++ b/tools/testing/selftests/ftrace/test.d/remotes/pkvm/trace_pipe.tc
@@ -0,0 +1,10 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# description: Test pkvm hypervisor tracing pipe
+
+SOURCE_REMOTE_TEST=1
+. $TEST_DIR/remotes/trace_pipe.tc
+
+set -e
+setup_remote "hypervisor"
+test_trace_pipe
diff --git a/tools/testing/selftests/ftrace/test.d/remotes/pkvm/unloading.tc b/tools/testing/selftests/ftrace/test.d/remotes/pkvm/unloading.tc
new file mode 100644
index 000000000000..059c7ad1c008
--- /dev/null
+++ b/tools/testing/selftests/ftrace/test.d/remotes/pkvm/unloading.tc
@@ -0,0 +1,10 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# description: Test pkvm hypervisor tracing buffer unloading
+
+SOURCE_REMOTE_TEST=1
+. $TEST_DIR/remotes/unloading.tc
+
+set -e
+setup_remote "hypervisor"
+test_unloading
--
2.49.0.1101.gccaa498523-goog
5 months, 1 week
- 1
- 0
[PATCH v5 12/25] tracing: selftests: Add trace remote tests
by Vincent Donnefort
Exercise the tracefs interface for trace remote with a set of tests to
check:
* loading/unloading (unloading.tc)
* reset (reset.tc)
* size changes (buffer_size.tc)
* event integrity (trace_pipe)
Cc: Shuah Khan <skhan(a)linuxfoundation.org>
Cc: linux-kselftest(a)vger.kernel.org
Signed-off-by: Vincent Donnefort <vdonnefort(a)google.com>
diff --git a/tools/testing/selftests/ftrace/test.d/remotes/buffer_size.tc b/tools/testing/selftests/ftrace/test.d/remotes/buffer_size.tc
new file mode 100644
index 000000000000..60bf431ccc91
--- /dev/null
+++ b/tools/testing/selftests/ftrace/test.d/remotes/buffer_size.tc
@@ -0,0 +1,24 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# description: Test trace remote buffer size
+
+. $TEST_DIR/remotes/functions
+
+test_buffer_size()
+{
+ echo 0 > tracing_on
+ assert_unloaded
+
+ echo 4096 > buffer_size_kb
+ echo 1 > tracing_on
+ assert_loaded
+
+ echo 0 > tracing_on
+ echo 7 > buffer_size_kb
+}
+
+if [ -z "$SOURCE_REMOTE_TEST" ]; then
+ set -e
+ setup_remote_test
+ test_buffer_size
+fi
diff --git a/tools/testing/selftests/ftrace/test.d/remotes/functions b/tools/testing/selftests/ftrace/test.d/remotes/functions
new file mode 100644
index 000000000000..504a495b3b1b
--- /dev/null
+++ b/tools/testing/selftests/ftrace/test.d/remotes/functions
@@ -0,0 +1,33 @@
+# SPDX-License-Identifier: GPL-2.0
+
+setup_remote()
+{
+ local name=$1
+
+ [ -e $TRACING_DIR/remotes/$name/write_event ] || exit_unresolved
+
+ cd remotes/$name/
+ echo 0 > tracing_on
+ clear_trace
+ echo 7 > buffer_size_kb
+ echo 0 > events/enable
+ echo 1 > events/$name/selftest/enable
+ echo 1 > tracing_on
+}
+
+setup_remote_test()
+{
+ [ -d $TRACING_DIR/remotes/test/ ] || modprobe remote_test || exit_unresolved
+
+ setup_remote "test"
+}
+
+assert_loaded()
+{
+ grep -q "(loaded)" buffer_size_kb
+}
+
+assert_unloaded()
+{
+ grep -q "(unloaded)" buffer_size_kb
+}
diff --git a/tools/testing/selftests/ftrace/test.d/remotes/reset.tc b/tools/testing/selftests/ftrace/test.d/remotes/reset.tc
new file mode 100644
index 000000000000..93d6eb2a807f
--- /dev/null
+++ b/tools/testing/selftests/ftrace/test.d/remotes/reset.tc
@@ -0,0 +1,105 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# description: Test trace remote reset
+
+. $TEST_DIR/remotes/functions
+
+get_cpu_ids()
+{
+ sed -n 's/^processor\s*:\s*\([0-9]\+\).*/\1/p' /proc/cpuinfo
+}
+
+dump_trace()
+{
+ output=$(mktemp /tmp/remote_test.XXXXXX)
+ cat trace_pipe > $output &
+ pid=$!
+ sleep 1
+ kill -1 $pid
+
+ echo $output
+}
+
+check_reset()
+{
+ write_event_path="write_event"
+ taskset=""
+
+ clear_trace
+
+ # Is the buffer empty?
+ output=$(dump_trace)
+ test $(wc -l $output | cut -d ' ' -f1) -eq 0
+
+ if $(echo $(pwd) | grep -q "per_cpu/cpu"); then
+ write_event_path="../../write_event"
+ cpu_id=$(echo $(pwd) | sed -e 's/.*per_cpu\/cpu//')
+ taskset="taskset -c $cpu_id"
+ fi
+ rm $output
+
+ # Can we properly write a new event?
+ $taskset echo 7890 > $write_event_path
+ output=$(dump_trace)
+ test $(wc -l $output | cut -d ' ' -f1) -eq 1
+ grep -q "id=7890" $output
+ rm $output
+}
+
+test_global_interface()
+{
+ output=$(mktemp /tmp/remote_test.XXXXXX)
+
+ # Confidence check
+ echo 123456 > write_event
+ output=$(dump_trace)
+ grep -q "id=123456" $output
+ rm $output
+
+ # Reset single event
+ echo 1 > write_event
+ check_reset
+
+ # Reset lost events
+ for i in $(seq 1 10000); do
+ echo 1 > write_event
+ done
+ check_reset
+}
+
+test_percpu_interface()
+{
+ [ "$(get_cpu_ids | wc -l)" -ge 2 ] || return 0
+
+ for cpu in $(get_cpu_ids); do
+ taskset -c $cpu echo 1 > write_event
+ done
+
+ check_non_empty=0
+ for cpu in $(get_cpu_ids); do
+ cd per_cpu/cpu$cpu/
+
+ if [ $check_non_empty -eq 0 ]; then
+ check_reset
+ check_non_empty=1
+ else
+ # Check we have only reset 1 CPU
+ output=$(dump_trace)
+ test $(wc -l $output | cut -d ' ' -f1) -eq 1
+ rm $output
+ fi
+ cd -
+ done
+}
+
+test_reset()
+{
+ test_global_interface
+ test_percpu_interface
+}
+
+if [ -z "$SOURCE_REMOTE_TEST" ]; then
+ set -e
+ setup_remote_test
+ test_reset
+fi
diff --git a/tools/testing/selftests/ftrace/test.d/remotes/trace_pipe.tc b/tools/testing/selftests/ftrace/test.d/remotes/trace_pipe.tc
new file mode 100644
index 000000000000..f4bd2b3655e0
--- /dev/null
+++ b/tools/testing/selftests/ftrace/test.d/remotes/trace_pipe.tc
@@ -0,0 +1,57 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# description: Test trace remote trace_pipe
+
+. $TEST_DIR/remotes/functions
+
+test_trace_pipe()
+{
+ echo 0 > tracing_on
+ assert_unloaded
+
+ echo 1024 > buffer_size_kb
+ echo 1 > tracing_on
+ assert_loaded
+
+ output=$(mktemp /tmp/remote_test.XXXXXX)
+
+ cat trace_pipe > $output &
+ pid=$!
+
+ for i in $(seq 1 1000); do
+ echo $i > write_event
+ done
+
+ echo 0 > tracing_on
+ sleep 1
+ kill $pid
+
+ prev_ts=0 # TODO: Init with proper clock value
+ prev_id=0
+
+ # Only keep <timestamp> <id>
+ sed -i -e 's/\[[0-9]*\]\s*\([0-9]*.[0-9]*\): [a-z]* id=\([0-9]*\)/\1 \2/' $output
+
+ IFS=$'\n'
+ for line in $(cat $output); do
+ ts=$(echo $line | cut -d ' ' -f 1)
+ id=$(echo $line | cut -d ' ' -f 2)
+
+ test $(echo "$ts>$prev_ts" | bc) -eq 1
+ test $id -eq $((prev_id + 1))
+
+ prev_ts=$ts
+ prev_id=$id
+ done
+
+ test $prev_id -eq 1000
+
+ rm $output
+}
+
+if [ -z "$SOURCE_REMOTE_TEST" ]; then
+ set -e
+
+ setup_remote_test
+ test_trace_pipe
+fi
diff --git a/tools/testing/selftests/ftrace/test.d/remotes/unloading.tc b/tools/testing/selftests/ftrace/test.d/remotes/unloading.tc
new file mode 100644
index 000000000000..99f97e100fde
--- /dev/null
+++ b/tools/testing/selftests/ftrace/test.d/remotes/unloading.tc
@@ -0,0 +1,40 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# description: Test trace remote unloading
+
+. $TEST_DIR/remotes/functions
+
+test_unloading()
+{
+ # No reader, writing
+ assert_loaded
+
+ # No reader, no writing
+ echo 0 > tracing_on
+ assert_unloaded
+
+ # 1 reader, no writing
+ cat trace_pipe &
+ pid=$!
+ sleep 1
+ assert_loaded
+ kill $pid
+ assert_unloaded
+
+ # No reader, no writing, events
+ echo 1 > tracing_on
+ echo 1 > write_event
+ echo 0 > tracing_on
+ assert_loaded
+
+ # Test reset
+ clear_trace
+ assert_unloaded
+}
+
+if [ -z "$SOURCE_REMOTE_TEST" ]; then
+ set -e
+
+ setup_remote_test
+ test_unloading
+fi
--
2.49.0.1101.gccaa498523-goog
5 months, 1 week
- 1
- 0
[PATCH v2 0/2] Skip mm selftests instead when kernel features are not present
by Zi Yan
Two guard_regions tests on userfaultfd fail when userfaultfd is not
present. Skip them instead.
hugevm test reads kernel config to get page table level information and
fails when neither /proc/config.gz nor /boot/config-* is present. Skip
it instead.
Zi Yan (2):
selftests/mm: skip guard_regions.uffd tests when uffd is not present.
selftests/mm: skip hugevm test if kernel config file is not present.
tools/testing/selftests/mm/guard-regions.c | 17 ++++++++++--
.../selftests/mm/va_high_addr_switch.sh | 26 +++++++------------
2 files changed, 24 insertions(+), 19 deletions(-)
--
2.47.2
5 months, 1 week
- 1
- 2
[RFC PATCH v2 0/3] KVM: arm64: Don't claim MTE_ASYNC if not supported
by Ben Horgan
The ID_AA64PFR1_EL1.MTE_frac field is currently hidden from KVM.
However, when ID_AA64PFR1_EL1.MTE==2, ID_AA64PFR1_EL1.MTE_frac==0
indicates that MTE_ASYNC is supported. On a host with
ID_AA64PFR1_EL1.MTE==2 but without MTE_ASYNC support a guest with the
MTE capability enabled will incorrectly see MTE_ASYNC advertised as
supported. This series fixes that.
This was found by inspection and the current behaviour is not known to
break anything. Linux doesn't check MTE_frac, and wrongly, assumes
MTE async faults can be generated whenever MTE is supported. This is
a separate problem and not addressed here.
I am looking for feedback on whether this change is valuable or
otherwise.
Changes since v1:
Only pass MTE_Frac hw value to the guest when it is the exact failure case.
Changed base commit to v6.15-rc5 but still applies on v6.16-rc2 as well.
Ben Horgan (3):
arm64/sysreg: Expose MTE_frac so that it is visible to KVM
KVM: arm64: Make MTE_frac masking conditional on MTE capability
KVM: selftests: Confirm exposing MTE_frac does not break migration
arch/arm64/kernel/cpufeature.c | 1 +
arch/arm64/kvm/sys_regs.c | 28 ++++++-
.../testing/selftests/kvm/arm64/set_id_regs.c | 77 ++++++++++++++++++-
3 files changed, 103 insertions(+), 3 deletions(-)
base-commit: 92a09c47464d040866cf2b4cd052bc60555185fb
--
2.43.0
5 months, 1 week
- 2
- 4
[PATCH] selftests: Improve test output grammar, code style
by Hanne-Lotta Mäenpää
Add small grammar fixes in perf events and Real Time Clock tests'
output messages.
Include braces around a single if statement, when there are multiple
statements in the else branch, to align with the kernel coding style.
Signed-off-by: Hanne-Lotta Mäenpää <hannelotta(a)gmail.com>
---
tools/testing/selftests/perf_events/watermark_signal.c | 7 ++++---
tools/testing/selftests/rtc/rtctest.c | 10 +++++-----
2 files changed, 9 insertions(+), 8 deletions(-)
diff --git a/tools/testing/selftests/perf_events/watermark_signal.c b/tools/testing/selftests/perf_events/watermark_signal.c
index 49dc1e831174..6176afd4950b 100644
--- a/tools/testing/selftests/perf_events/watermark_signal.c
+++ b/tools/testing/selftests/perf_events/watermark_signal.c
@@ -65,8 +65,9 @@ TEST(watermark_signal)
child = fork();
EXPECT_GE(child, 0);
- if (child == 0)
+ if (child == 0) {
do_child();
+ }
else if (child < 0) {
perror("fork()");
goto cleanup;
@@ -75,7 +76,7 @@ TEST(watermark_signal)
if (waitpid(child, &child_status, WSTOPPED) != child ||
!(WIFSTOPPED(child_status) && WSTOPSIG(child_status) == SIGSTOP)) {
fprintf(stderr,
- "failed to sycnhronize with child errno=%d status=%x\n",
+ "failed to synchronize with child errno=%d status=%x\n",
errno,
child_status);
goto cleanup;
@@ -84,7 +85,7 @@ TEST(watermark_signal)
fd = syscall(__NR_perf_event_open, &attr, child, -1, -1,
PERF_FLAG_FD_CLOEXEC);
if (fd < 0) {
- fprintf(stderr, "failed opening event %llx\n", attr.config);
+ fprintf(stderr, "failed to setup performance monitoring %llx\n", attr.config);
goto cleanup;
}
diff --git a/tools/testing/selftests/rtc/rtctest.c b/tools/testing/selftests/rtc/rtctest.c
index be175c0e6ae3..8fd4d5d3b527 100644
--- a/tools/testing/selftests/rtc/rtctest.c
+++ b/tools/testing/selftests/rtc/rtctest.c
@@ -138,10 +138,10 @@ TEST_F_TIMEOUT(rtc, date_read_loop, READ_LOOP_DURATION_SEC + 2) {
rtc_read = rtc_time_to_timestamp(&rtc_tm);
/* Time should not go backwards */
ASSERT_LE(prev_rtc_read, rtc_read);
- /* Time should not increase more then 1s at a time */
+ /* Time should not increase more than 1s per read */
ASSERT_GE(prev_rtc_read + 1, rtc_read);
- /* Sleep 11ms to avoid killing / overheating the RTC */
+ /* Sleep 11ms to avoid overheating the RTC */
nanosleep_with_retries(READ_LOOP_SLEEP_MS * 1000000);
prev_rtc_read = rtc_read;
@@ -236,7 +236,7 @@ TEST_F(rtc, alarm_alm_set) {
if (alarm_state == RTC_ALARM_DISABLED)
SKIP(return, "Skipping test since alarms are not supported.");
if (alarm_state == RTC_ALARM_RES_MINUTE)
- SKIP(return, "Skipping test since alarms has only minute granularity.");
+ SKIP(return, "Skipping test since alarms have only minute granularity.");
rc = ioctl(self->fd, RTC_RD_TIME, &tm);
ASSERT_NE(-1, rc);
@@ -306,7 +306,7 @@ TEST_F(rtc, alarm_wkalm_set) {
if (alarm_state == RTC_ALARM_DISABLED)
SKIP(return, "Skipping test since alarms are not supported.");
if (alarm_state == RTC_ALARM_RES_MINUTE)
- SKIP(return, "Skipping test since alarms has only minute granularity.");
+ SKIP(return, "Skipping test since alarms have only minute granularity.");
rc = ioctl(self->fd, RTC_RD_TIME, &alarm.time);
ASSERT_NE(-1, rc);
@@ -502,7 +502,7 @@ int main(int argc, char **argv)
if (access(rtc_file, R_OK) == 0)
ret = test_harness_run(argc, argv);
else
- ksft_exit_skip("[SKIP]: Cannot access rtc file %s - Exiting\n",
+ ksft_exit_skip("Cannot access RTC file %s - exiting\n",
rtc_file);
return ret;
--
2.39.5
5 months, 1 week
- 2
- 2
[PATCH 1/2] selftests/mm: skip uffd tests in madv_guard if uffd is not present.
by Zi Yan
When userfaultfd is not compiled into kernel, userfaultfd() returns -1,
causing uffd tests in madv_guard fail. Skip the tests instead.
Signed-off-by: Zi Yan <ziy(a)nvidia.com>
---
tools/testing/selftests/mm/guard-regions.c | 17 +++++++++++++++--
1 file changed, 15 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/mm/guard-regions.c b/tools/testing/selftests/mm/guard-regions.c
index 0cd9d236649d..93af3d3760f9 100644
--- a/tools/testing/selftests/mm/guard-regions.c
+++ b/tools/testing/selftests/mm/guard-regions.c
@@ -1453,8 +1453,21 @@ TEST_F(guard_regions, uffd)
/* Set up uffd. */
uffd = userfaultfd(0);
- if (uffd == -1 && errno == EPERM)
- ksft_exit_skip("No userfaultfd permissions, try running as root.\n");
+ if (uffd == -1) {
+ switch (errno) {
+ case EPERM:
+ SKIP(return, "No userfaultfd permissions, try running as root.");
+ break;
+ case ENOSYS:
+ SKIP(return, "userfaultfd is not supported/not enabled.");
+ break;
+ default:
+ ksft_exit_fail_msg("userfaultfd failed with %s\n",
+ strerror(errno));
+ break;
+ }
+ }
+
ASSERT_NE(uffd, -1);
ASSERT_EQ(ioctl(uffd, UFFDIO_API, &api), 0);
--
2.47.2
5 months, 1 week
- 3
- 8
[PATCH net-next v5] selftests/vsock: add initial vmtest.sh for vsock
by Bobby Eshleman
This commit introduces a new vmtest.sh runner for vsock.
It uses virtme-ng/qemu to run tests in a VM. The tests validate G2H,
H2G, and loopback. The testing tools from tools/testing/vsock/ are
reused. Currently, only vsock_test is used.
VMCI and hyperv support is automatically built, though not used.
Only tested on x86.
To run:
$ tools/testing/selftests/vsock/vmtest.sh
or
$ make -C tools/testing/selftests TARGETS=vsock run_tests
Example runs:
$ ./tools/testing/selftests/vsock/vmtest.sh
TAP version 13
1..3
not ok 0 vm_server_host_client # exit=1
ok 1 vm_client_host_server
ok 2 vm_loopback
1..3
$ ./tools/testing/selftests/vsock/vmtest.sh vm_loopback
TAP version 13
1..1
ok 0 vm_loopback
1..1
Future work can include vsock_diag_test.
The tap output style copies mm's run_vmtests.sh.
Because vsock requires a VM to test anything other than loopback, this
patch adds vmtest.sh as a kselftest itself. This is different than other
systems that have a "vmtest.sh", where it is used as a utility script to
spin up a VM to run the selftests as a guest (but isn't hooked into
kselftest).
Testing in NIPA is still WIP.
Signed-off-by: Bobby Eshleman <bobbyeshleman(a)gmail.com>
---
Changes in v5:
- make log file a tmpfile (Paolo)
- make sure both default and user defined QEMU gets handled by the dependency check (Paolo)
- increased VM boot up timeout from 1m to 3m for slow hosts (Paolo)
- rename vm_setup -> vm_start (Paolo)
- derive wait_for_listener from selftests/net/net_helper.sh to removes ss usage
- Remove unused 'unset IFS' line (Paolo)
- leave space after variable declarations (Paolo)
- make QEMU_PIDFILE a tmp file (Paolo)
- make everything readonly that is only read (Paolo)
- source ktap_helpers.sh for KSFT_PASS and friends (Paolo)
- don't check for timeout util (Paolo)
- add missing usage string for -q qemu arg
- add tap prefix to SUMMARY line since it isn't part of TAP protocol
- exit with the correct status code based on failure/pass counts
- Link to v4: https://lore.kernel.org/r/20250507-vsock-vmtest-v4-1-6e2a97262cd6@gmail.com
Changes in v4:
- do not use special tab delimiter for help string parsing (Stefano + Paolo)
- fix paths for when installing kselftest and running out-of-tree (Paolo)
- change vng to using running kernel instead of compiled kernel (Paolo)
- use multi-line string for QEMU_OPTS (Stefano)
- change timeout to 300s (Paolo)
- skip if tools are not found and use kselftests status codes (Paolo)
- remove build from vmtest.sh (Paolo)
- change 2222 -> SSH_HOST_PORT (Stefano)
- add tap-format output
- add vmtest.log to gitignore
- check for vsock_test binary and remind user to build it if missing
- create a proper build in makefile
- style fixes
- add ssh, timeout, and pkill to dependency check, just in case
- fix numerical comparison in conditionals
- check qemu pidfile exists before proceeding (avoid wasting time waiting for ssh)
- fix tracking of pass/fail bug
- fix stderr redirection bug
- Link to v3: https://lore.kernel.org/r/20250428-vsock-vmtest-v3-1-181af6163f3e@gmail.com
Changes in v3:
- use common conditional syntax for checking variables
- use return value instead of global rc
- fix typo TEST_HOST_LISTENER_PORT -> TEST_HOST_PORT_LISTENER
- use SIGTERM instead of SIGKILL on cleanup
- use peer-cid=1 for loopback
- change sleep delay times into globals
- fix test_vm_loopback logging
- add test selection in arguments
- make QEMU an argument
- check that vng binary is on path
- use QEMU variable
- change <tab><backslash> to <space><backslash>
- fix hardcoded file paths
- add comment in commit msg about script that vmtest.sh was based off of
- Add tools/testing/selftest/vsock/Makefile for kselftest
- Link to v2: https://lore.kernel.org/r/20250417-vsock-vmtest-v2-1-3901a27331e8@gmail.com
Changes in v2:
- add kernel oops and warnings checker
- change testname variable to use FUNCNAME
- fix spacing in test_vm_server_host_client
- add -s skip build option to vmtest.sh
- add test_vm_loopback
- pass port to vm_wait_for_listener
- fix indentation in vmtest.sh
- add vmci and hyperv to config
- changed whitespace from tabs to spaces in help string
- Link to v1: https://lore.kernel.org/r/20250410-vsock-vmtest-v1-1-f35a81dab98c@gmail.com
---
MAINTAINERS | 1 +
tools/testing/selftests/vsock/.gitignore | 2 +
tools/testing/selftests/vsock/Makefile | 16 ++
tools/testing/selftests/vsock/config | 114 ++++++++
tools/testing/selftests/vsock/settings | 1 +
tools/testing/selftests/vsock/vmtest.sh | 441 +++++++++++++++++++++++++++++++
6 files changed, 575 insertions(+)
diff --git a/MAINTAINERS b/MAINTAINERS
index 657a67f9031ef7798c19ac63e6383d4cb18a9e1f..3fbdd7bbfce7196a3cc7db70203317c6bd0e51fd 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -25751,6 +25751,7 @@ F: include/uapi/linux/vm_sockets.h
F: include/uapi/linux/vm_sockets_diag.h
F: include/uapi/linux/vsockmon.h
F: net/vmw_vsock/
+F: tools/testing/selftests/vsock/
F: tools/testing/vsock/
VMALLOC
diff --git a/tools/testing/selftests/vsock/.gitignore b/tools/testing/selftests/vsock/.gitignore
new file mode 100644
index 0000000000000000000000000000000000000000..9c5bf379480f829a14713d5f5dc7d525bc272e84
--- /dev/null
+++ b/tools/testing/selftests/vsock/.gitignore
@@ -0,0 +1,2 @@
+vmtest.log
+vsock_test
diff --git a/tools/testing/selftests/vsock/Makefile b/tools/testing/selftests/vsock/Makefile
new file mode 100644
index 0000000000000000000000000000000000000000..7ab4970e5e8a019be33f96a36f95c00573d7bfcf
--- /dev/null
+++ b/tools/testing/selftests/vsock/Makefile
@@ -0,0 +1,16 @@
+# SPDX-License-Identifier: GPL-2.0
+
+CURDIR := $(abspath .)
+TOOLSDIR := $(abspath ../../..)
+
+$(OUTPUT)/vsock_test: $(TOOLSDIR)/testing/vsock/vsock_test
+ install -m 755 $< $@
+
+$(TOOLSDIR)/testing/vsock/vsock_test:
+ $(MAKE) -C $(TOOLSDIR)/testing/vsock vsock_test
+
+TEST_PROGS += vmtest.sh
+TEST_GEN_FILES := vsock_test
+
+include ../lib.mk
+
diff --git a/tools/testing/selftests/vsock/config b/tools/testing/selftests/vsock/config
new file mode 100644
index 0000000000000000000000000000000000000000..3bffaaf98fff92dc0e3bc1286afa3d8d5d52f4c7
--- /dev/null
+++ b/tools/testing/selftests/vsock/config
@@ -0,0 +1,114 @@
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_BPF=y
+CONFIG_BPF_SYSCALL=y
+CONFIG_BPF_JIT=y
+CONFIG_HAVE_EBPF_JIT=y
+CONFIG_BPF_EVENTS=y
+CONFIG_FTRACE_SYSCALLS=y
+CONFIG_FUNCTION_TRACER=y
+CONFIG_HAVE_DYNAMIC_FTRACE=y
+CONFIG_DYNAMIC_FTRACE=y
+CONFIG_HAVE_KPROBES=y
+CONFIG_KPROBES=y
+CONFIG_KPROBE_EVENTS=y
+CONFIG_ARCH_SUPPORTS_UPROBES=y
+CONFIG_UPROBES=y
+CONFIG_UPROBE_EVENTS=y
+CONFIG_DEBUG_FS=y
+CONFIG_FW_CFG_SYSFS=y
+CONFIG_FW_CFG_SYSFS_CMDLINE=y
+CONFIG_DRM=y
+CONFIG_DRM_VIRTIO_GPU=y
+CONFIG_DRM_VIRTIO_GPU_KMS=y
+CONFIG_DRM_BOCHS=y
+CONFIG_VIRTIO_IOMMU=y
+CONFIG_SOUND=y
+CONFIG_SND=y
+CONFIG_SND_SEQUENCER=y
+CONFIG_SND_PCI=y
+CONFIG_SND_INTEL8X0=y
+CONFIG_SND_HDA_CODEC_REALTEK=y
+CONFIG_SECURITYFS=y
+CONFIG_CGROUP_BPF=y
+CONFIG_SQUASHFS=y
+CONFIG_SQUASHFS_XZ=y
+CONFIG_SQUASHFS_ZSTD=y
+CONFIG_FUSE_FS=y
+CONFIG_SERIO=y
+CONFIG_PCI=y
+CONFIG_INPUT=y
+CONFIG_INPUT_KEYBOARD=y
+CONFIG_KEYBOARD_ATKBD=y
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_X86_VERBOSE_BOOTUP=y
+CONFIG_VGA_CONSOLE=y
+CONFIG_FB=y
+CONFIG_FB_VESA=y
+CONFIG_FRAMEBUFFER_CONSOLE=y
+CONFIG_RTC_CLASS=y
+CONFIG_RTC_HCTOSYS=y
+CONFIG_RTC_DRV_CMOS=y
+CONFIG_HYPERVISOR_GUEST=y
+CONFIG_PARAVIRT=y
+CONFIG_KVM_GUEST=y
+CONFIG_KVM=y
+CONFIG_KVM_INTEL=y
+CONFIG_KVM_AMD=y
+CONFIG_VSOCKETS=y
+CONFIG_VSOCKETS_DIAG=y
+CONFIG_VSOCKETS_LOOPBACK=y
+CONFIG_VMWARE_VMCI_VSOCKETS=y
+CONFIG_VIRTIO_VSOCKETS=y
+CONFIG_VIRTIO_VSOCKETS_COMMON=y
+CONFIG_HYPERV_VSOCKETS=y
+CONFIG_VMWARE_VMCI=y
+CONFIG_VHOST_VSOCK=y
+CONFIG_HYPERV=y
+CONFIG_UEVENT_HELPER=n
+CONFIG_VIRTIO=y
+CONFIG_VIRTIO_PCI=y
+CONFIG_VIRTIO_MMIO=y
+CONFIG_VIRTIO_BALLOON=y
+CONFIG_NET=y
+CONFIG_NET_CORE=y
+CONFIG_NETDEVICES=y
+CONFIG_NETWORK_FILESYSTEMS=y
+CONFIG_INET=y
+CONFIG_NET_9P=y
+CONFIG_NET_9P_VIRTIO=y
+CONFIG_9P_FS=y
+CONFIG_VIRTIO_NET=y
+CONFIG_CMDLINE_OVERRIDE=n
+CONFIG_BINFMT_SCRIPT=y
+CONFIG_SHMEM=y
+CONFIG_TMPFS=y
+CONFIG_UNIX=y
+CONFIG_MODULE_SIG_FORCE=n
+CONFIG_DEVTMPFS=y
+CONFIG_TTY=y
+CONFIG_VT=y
+CONFIG_UNIX98_PTYS=y
+CONFIG_EARLY_PRINTK=y
+CONFIG_INOTIFY_USER=y
+CONFIG_BLOCK=y
+CONFIG_SCSI_LOWLEVEL=y
+CONFIG_SCSI=y
+CONFIG_SCSI_VIRTIO=y
+CONFIG_BLK_DEV_SD=y
+CONFIG_VIRTIO_CONSOLE=y
+CONFIG_WATCHDOG=y
+CONFIG_WATCHDOG_CORE=y
+CONFIG_I6300ESB_WDT=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
+CONFIG_OVERLAY_FS=y
+CONFIG_DAX=y
+CONFIG_DAX_DRIVER=y
+CONFIG_FS_DAX=y
+CONFIG_MEMORY_HOTPLUG=y
+CONFIG_MEMORY_HOTREMOVE=y
+CONFIG_ZONE_DEVICE=y
+CONFIG_FUSE_FS=y
+CONFIG_VIRTIO_FS=y
+CONFIG_VSOCKETS=y
+CONFIG_VIRTIO_VSOCKETS=y
diff --git a/tools/testing/selftests/vsock/settings b/tools/testing/selftests/vsock/settings
new file mode 100644
index 0000000000000000000000000000000000000000..694d70710ff08ac9fc91e9ecb5dbdadcf051f019
--- /dev/null
+++ b/tools/testing/selftests/vsock/settings
@@ -0,0 +1 @@
+timeout=300
diff --git a/tools/testing/selftests/vsock/vmtest.sh b/tools/testing/selftests/vsock/vmtest.sh
new file mode 100755
index 0000000000000000000000000000000000000000..f5f920e83db6d24793b435b373e75d6051b7a9d5
--- /dev/null
+++ b/tools/testing/selftests/vsock/vmtest.sh
@@ -0,0 +1,441 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+#
+# Copyright (c) 2025 Meta Platforms, Inc. and affiliates
+#
+# Dependencies:
+# * virtme-ng
+# * busybox-static (used by virtme-ng)
+# * qemu (used by virtme-ng)
+
+readonly SCRIPT_DIR="$(cd -P -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd -P)"
+
+source ${SCRIPT_DIR}/../kselftest/ktap_helpers.sh
+
+readonly TAP_PREFIX="# "
+readonly VSOCK_TEST=${SCRIPT_DIR}/vsock_test
+
+readonly TEST_GUEST_PORT=51000
+readonly TEST_HOST_PORT=50000
+readonly TEST_HOST_PORT_LISTENER=50001
+readonly SSH_GUEST_PORT=22
+readonly SSH_HOST_PORT=2222
+readonly VSOCK_CID=1234
+readonly WAIT_PERIOD=3
+readonly WAIT_PERIOD_MAX=60
+readonly WAIT_TOTAL=$(( WAIT_PERIOD * WAIT_PERIOD_MAX ))
+readonly QEMU_PIDFILE=$(mktemp /tmp/qemu_vsock_vmtest_XXXX.pid)
+
+# virtme-ng offers a netdev for ssh when using "--ssh", but we also need a
+# control port forwarded for vsock_test. Because virtme-ng doesn't support
+# adding an additional port to forward to the device created from "--ssh" and
+# virtme-init mistakenly sets identical IPs to the ssh device and additional
+# devices, we instead opt out of using --ssh, add the device manually, and also
+# add the kernel cmdline options that virtme-init uses to setup the interface.
+readonly QEMU_TEST_PORT_FWD="hostfwd=tcp::${TEST_HOST_PORT}-:${TEST_GUEST_PORT}"
+readonly QEMU_SSH_PORT_FWD="hostfwd=tcp::${SSH_HOST_PORT}-:${SSH_GUEST_PORT}"
+readonly QEMU_OPTS="\
+ -netdev user,id=n0,${QEMU_TEST_PORT_FWD},${QEMU_SSH_PORT_FWD} \
+ -device virtio-net-pci,netdev=n0 \
+ -device vhost-vsock-pci,guest-cid=${VSOCK_CID} \
+ --pidfile ${QEMU_PIDFILE} \
+"
+readonly KERNEL_CMDLINE="virtme.dhcp net.ifnames=0 biosdevname=0 virtme.ssh virtme_ssh_user=$USER"
+readonly LOG=$(mktemp /tmp/vsock_vmtest_XXXX.log)
+readonly TEST_NAMES=(vm_server_host_client vm_client_host_server vm_loopback)
+readonly TEST_DESCS=(
+ "Run vsock_test in server mode on the VM and in client mode on the host."
+ "Run vsock_test in client mode on the VM and in server mode on the host."
+ "Run vsock_test using the loopback transport in the VM."
+)
+
+VERBOSE=0
+
+usage() {
+ local name
+ local desc
+ local i
+
+ echo
+ echo "$0 [OPTIONS] [TEST]..."
+ echo "If no TEST argument is given, all tests will be run."
+ echo
+ echo "Options"
+ echo " -v: verbose output"
+ echo " -q: set the path to or name of qemu binary"
+ echo
+ echo "Available tests"
+
+ for ((i = 0; i < ${#TEST_NAMES[@]}; i++)); do
+ name=${TEST_NAMES[${i}]}
+ desc=${TEST_DESCS[${i}]}
+ printf "\t%-35s%-35s\n" "${name}" "${desc}"
+ done
+ echo
+
+ exit 1
+}
+
+die() {
+ echo "$*" >&2
+ exit ${KSFT_FAIL}
+}
+
+vm_ssh() {
+ ssh -q -o UserKnownHostsFile=/dev/null -p ${SSH_HOST_PORT} localhost $*
+ return $?
+}
+
+cleanup() {
+ if [[ -f "${QEMU_PIDFILE}" ]]; then
+ pkill -SIGTERM -F ${QEMU_PIDFILE} 2>&1 > /dev/null
+ fi
+}
+
+check_args() {
+ local found
+
+ for arg in "$@"; do
+ found=0
+ for name in "${TEST_NAMES[@]}"; do
+ if [[ "${name}" = "${arg}" ]]; then
+ found=1
+ break
+ fi
+ done
+
+ if [[ "${found}" -eq 0 ]]; then
+ echo "${arg} is not an available test" >&2
+ usage
+ fi
+ done
+
+ for arg in "$@"; do
+ if ! command -v > /dev/null "test_${arg}"; then
+ echo "Test ${arg} not found" >&2
+ usage
+ fi
+ done
+}
+
+check_deps() {
+ for dep in vng ${QEMU} busybox pkill ssh; do
+ if [[ ! -x "$(command -v ${dep})" ]]; then
+ echo -e "skip: dependency ${dep} not found!\n"
+ exit ${KSFT_SKIP}
+ fi
+ done
+
+ if [[ ! -x $(command -v ${VSOCK_TEST}) ]]; then
+ printf "skip: ${VSOCK_TEST} not found!"
+ printf " Please build the kselftest vsock target.\n"
+ exit ${KSFT_SKIP}
+ fi
+}
+
+vm_start() {
+ local VNG_OPTS=""
+ local logfile=/dev/null
+ local qemu
+
+ qemu=$(command -v ${QEMU})
+
+ if [[ "${VERBOSE}" = 1 ]]; then
+ VNG_OPTS="--verbose"
+ logfile=/dev/stdout
+ fi
+ vng \
+ $VNG_OPTS \
+ --run \
+ --qemu-opts="${QEMU_OPTS}" \
+ --qemu="${qemu}" \
+ --user root \
+ --append "${KERNEL_CMDLINE}" \
+ --rw &> ${logfile} &
+
+ timeout ${WAIT_TOTAL} \
+ bash -c 'while [[ ! -e '"${QEMU_PIDFILE}"' ]]; do sleep 1; done; exit 0'
+ if [[ ! $? -eq 0 ]]; then
+ die "failed to boot VM"
+ fi
+}
+
+vm_wait_for_ssh() {
+ local i
+
+ i=0
+ while [[ true ]]; do
+ if [[ ${i} -gt ${WAIT_PERIOD_MAX} ]]; then
+ die "Timed out waiting for guest ssh"
+ fi
+ vm_ssh -- true
+ if [[ $? -eq 0 ]]; then
+ break
+ fi
+ i=$(( i + 1 ))
+ sleep ${WAIT_PERIOD}
+ done
+}
+
+# derived from selftests/net/net_helper.sh
+wait_for_listener()
+{
+ local port=$1
+ local interval=$2
+ local max_intervals=$3
+ local protocol=tcp
+ local pattern
+ local i
+
+ pattern=":$(printf "%04X" "${port}") "
+
+ # for tcp protocol additionally check the socket state
+ [ "${protocol}" = "tcp" ] && pattern="${pattern}0A"
+ for i in $(seq "${max_intervals}"); do
+ if awk '{print $2" "$4}' /proc/net/"${protocol}"* | \
+ grep -q "${pattern}"; then
+ break
+ fi
+ sleep "${interval}"
+ done
+}
+
+vm_wait_for_listener() {
+ local port=$1
+
+ vm_ssh <<EOF
+$(declare -f wait_for_listener)
+wait_for_listener ${port} ${WAIT_PERIOD} ${WAIT_PERIOD_MAX}
+EOF
+}
+
+host_wait_for_listener() {
+ wait_for_listener ${TEST_HOST_PORT_LISTENER} ${WAIT_PERIOD} ${WAIT_PERIOD_MAX}
+}
+
+__log_stdin() {
+ cat | awk '{ printf "%s:\t%s\n","'"${prefix}"'", $0 }'
+}
+
+__log_args() {
+ echo "$*" | awk '{ printf "%s:\t%s\n","'"${prefix}"'", $0 }'
+}
+
+log() {
+ local prefix="$1"
+
+ shift
+ local redirect=
+ if [[ ${VERBOSE} -eq 0 ]]; then
+ redirect=/dev/null
+ else
+ redirect=/dev/stdout
+ fi
+
+ if [[ "$#" -eq 0 ]]; then
+ __log_stdin | tee -a ${LOG} > ${redirect}
+ else
+ __log_args | tee -a ${LOG} > ${redirect}
+ fi
+}
+
+log_setup() {
+ log "setup" "$@"
+}
+
+log_host() {
+ local testname=$1
+
+ shift
+ log "test:${testname}:host" "$@"
+}
+
+log_guest() {
+ local testname=$1
+
+ shift
+ log "test:${testname}:guest" "$@"
+}
+
+tap_prefix() {
+ sed -e "s/^/${TAP_PREFIX}/"
+}
+
+tap_output() {
+ if [[ ! -z "$TAP_PREFIX" ]]; then
+ read str
+ echo $str
+ fi
+}
+
+test_vm_server_host_client() {
+ local testname="${FUNCNAME[0]#test_}"
+
+ vm_ssh -- "${VSOCK_TEST}" \
+ --mode=server \
+ --control-port="${TEST_GUEST_PORT}" \
+ --peer-cid=2 \
+ 2>&1 | log_guest "${testname}" &
+
+ vm_wait_for_listener ${TEST_GUEST_PORT}
+
+ ${VSOCK_TEST} \
+ --mode=client \
+ --control-host=127.0.0.1 \
+ --peer-cid="${VSOCK_CID}" \
+ --control-port="${TEST_HOST_PORT}" 2>&1 | log_host "${testname}"
+
+ return $?
+}
+
+test_vm_client_host_server() {
+ local testname="${FUNCNAME[0]#test_}"
+
+ ${VSOCK_TEST} \
+ --mode "server" \
+ --control-port "${TEST_HOST_PORT_LISTENER}" \
+ --peer-cid "${VSOCK_CID}" 2>&1 | log_host "${testname}" &
+
+ host_wait_for_listener
+
+ vm_ssh -- "${VSOCK_TEST}" \
+ --mode=client \
+ --control-host=10.0.2.2 \
+ --peer-cid=2 \
+ --control-port="${TEST_HOST_PORT_LISTENER}" 2>&1 | log_guest "${testname}"
+
+ return $?
+}
+
+test_vm_loopback() {
+ local testname="${FUNCNAME[0]#test_}"
+ local port=60000 # non-forwarded local port
+
+ vm_ssh -- ${VSOCK_TEST} \
+ --mode=server \
+ --control-port="${port}" \
+ --peer-cid=1 2>&1 | log_guest "${testname}" &
+
+ vm_wait_for_listener ${port}
+
+ vm_ssh -- ${VSOCK_TEST} \
+ --mode=client \
+ --control-host="127.0.0.1" \
+ --control-port="${port}" \
+ --peer-cid=1 2>&1 | log_guest "${testname}"
+
+ return $?
+}
+
+run_test() {
+ local host_oops_cnt_before
+ local host_warn_cnt_before
+ local vm_oops_cnt_before
+ local vm_warn_cnt_before
+ local host_oops_cnt_after
+ local host_warn_cnt_after
+ local vm_oops_cnt_after
+ local vm_warn_cnt_after
+ local name
+ local rc
+
+ host_oops_cnt_before=$(dmesg | grep -c -i 'Oops')
+ host_warn_cnt_before=$(dmesg --level=warn | wc -l)
+ vm_oops_cnt_before=$(vm_ssh -- dmesg | grep -c -i 'Oops')
+ vm_warn_cnt_before=$(vm_ssh -- dmesg --level=warn | wc -l)
+
+ name=$(echo "${1}" | awk '{ print $1 }')
+ eval test_"${name}"
+ rc=$?
+
+ host_oops_cnt_after=$(dmesg | grep -i 'Oops' | wc -l)
+ if [[ ${host_oops_cnt_after} -gt ${host_oops_cnt_before} ]]; then
+ echo "${name}: kernel oops detected on host" | log_host ${name}
+ rc=$KSFT_FAIL
+ fi
+
+ host_warn_cnt_after=$(dmesg --level=warn | wc -l)
+ if [[ ${host_warn_cnt_after} -gt ${host_warn_cnt_before} ]]; then
+ echo "${name}: kernel warning detected on host" | log_host ${name}
+ rc=$KSFT_FAIL
+ fi
+
+ vm_oops_cnt_after=$(vm_ssh -- dmesg | grep -i 'Oops' | wc -l)
+ if [[ ${vm_oops_cnt_after} -gt ${vm_oops_cnt_before} ]]; then
+ echo "${name}: kernel oops detected on vm" | log_host ${name}
+ rc=$KSFT_FAIL
+ fi
+
+ vm_warn_cnt_after=$(vm_ssh -- dmesg --level=warn | wc -l)
+ if [[ ${vm_warn_cnt_after} -gt ${vm_warn_cnt_before} ]]; then
+ echo "${name}: kernel warning detected on vm" | log_host ${name}
+ rc=$KSFT_FAIL
+ fi
+
+ return ${rc}
+}
+
+QEMU="qemu-system-$(uname -m)"
+
+while getopts :hvsq: o
+do
+ case $o in
+ v) VERBOSE=1;;
+ q) QEMU=$OPTARG;;
+ h|*) usage;;
+ esac
+done
+shift $((OPTIND-1))
+
+trap cleanup EXIT
+
+if [[ ${#} -eq 0 ]]; then
+ ARGS=(${TEST_NAMES[@]})
+else
+ ARGS=($@)
+fi
+
+check_args "${ARGS[@]}"
+check_deps
+
+echo "TAP version 13" | tap_output
+echo "1..${#ARGS[@]}" | tap_output
+
+log_setup "Booting up VM"
+vm_start
+vm_wait_for_ssh
+log_setup "VM booted up"
+
+cnt_pass=0
+cnt_fail=0
+cnt_skip=0
+cnt_total=0
+exitcode=0
+for arg in "${ARGS[@]}"; do
+ run_test "${arg}"
+ rc=$?
+ if [[ ${rc} == $KSFT_PASS ]]; then
+ cnt_pass=$(( cnt_pass + 1 ))
+ echo "[PASS]" | tap_prefix
+ echo "ok ${cnt_total} ${arg}" | tap_output
+ elif [[ ${rc} == $KSFT_SKIP ]]; then
+ cnt_skip=$(( cnt_skip + 1 ))
+ echo "[SKIP]" | tap_prefix
+ echo "ok ${cnt_total} ${arg} # SKIP" | tap_output
+ exitcode=$KSFT_SKIP
+ elif [[ ${rc} == $KSFT_FAIL ]]; then
+ cnt_fail=$(( cnt_fail + 1 ))
+ echo "[FAIL]" | tap_prefix
+ echo "not ok ${cnt_total} ${arg} # exit=$rc" | tap_output
+ exitcode=$KSFT_FAIL
+ fi
+ cnt_total=$(( cnt_total + 1 ))
+done
+
+echo "SUMMARY: PASS=${cnt_pass} SKIP=${cnt_skip} FAIL=${cnt_fail}" | tap_prefix
+
+if [ $((cnt_pass + cnt_skip)) -eq "$KSFT_NUM_TESTS" ]; then
+ exit "$KSFT_PASS"
+else
+ exit "$KSFT_FAIL"
+fi
---
base-commit: 8066e388be48f1ad62b0449dc1d31a25489fa12a
change-id: 20250325-vsock-vmtest-b3a21d2102c2
Best regards,
--
Bobby Eshleman <bobbyeshleman(a)gmail.com>
5 months, 1 week
- 2
- 2
[PATCH net-next v6] selftests/vsock: add initial vmtest.sh for vsock
by Bobby Eshleman
This commit introduces a new vmtest.sh runner for vsock.
It uses virtme-ng/qemu to run tests in a VM. The tests validate G2H,
H2G, and loopback. The testing tools from tools/testing/vsock/ are
reused. Currently, only vsock_test is used.
VMCI and hyperv support is automatically built, though not used.
Only tested on x86.
To run:
$ make -C tools/testing/selftests TARGETS=vsock
$ tools/testing/selftests/vsock/vmtest.sh
or
$ make -C tools/testing/selftests TARGETS=vsock run_tests
Example runs:
$ ./tools/testing/selftests/vsock/vmtest.sh
TAP version 13
1..3
not ok 0 vm_server_host_client # exit=1
ok 1 vm_client_host_server
ok 2 vm_loopback
1..3
$ ./tools/testing/selftests/vsock/vmtest.sh vm_loopback
TAP version 13
1..1
ok 0 vm_loopback
1..1
Future work can include vsock_diag_test.
The tap output style copies mm's run_vmtests.sh.
Because vsock requires a VM to test anything other than loopback, this
patch adds vmtest.sh as a kselftest itself. This is different than other
systems that have a "vmtest.sh", where it is used as a utility script to
spin up a VM to run the selftests as a guest (but isn't hooked into
kselftest).
Testing in NIPA is still WIP.
Signed-off-by: Bobby Eshleman <bobbyeshleman(a)gmail.com>
---
Changes in v6:
- add make cmd in commit message in vmtest.sh example (Stefano)
- check nonzero size of QEMU_PIDFILE using -s conditional (Stefano)
- display log file path after tests so it is easier to find amongst other random names
- cleanup qemu pidfile if qemu is unable to remove it
- make oops/warning failures more obvious with 'FAIL' prefix in log
(simply saying 'detected' wasn't clear enough to identify failing
condition)
- Link to v5: https://lore.kernel.org/r/20250513-vsock-vmtest-v5-1-4e75c4a45ceb@gmail.com
Changes in v5:
- make log file a tmpfile (Paolo)
- make sure both default and user defined QEMU gets handled by the dependency check (Paolo)
- increased VM boot up timeout from 1m to 3m for slow hosts (Paolo)
- rename vm_setup -> vm_start (Paolo)
- derive wait_for_listener from selftests/net/net_helper.sh to removes ss usage
- Remove unused 'unset IFS' line (Paolo)
- leave space after variable declarations (Paolo)
- make QEMU_PIDFILE a tmp file (Paolo)
- make everything readonly that is only read (Paolo)
- source ktap_helpers.sh for KSFT_PASS and friends (Paolo)
- don't check for timeout util (Paolo)
- add missing usage string for -q qemu arg
- add tap prefix to SUMMARY line since it isn't part of TAP protocol
- exit with the correct status code based on failure/pass counts
- Link to v4: https://lore.kernel.org/r/20250507-vsock-vmtest-v4-1-6e2a97262cd6@gmail.com
Changes in v4:
- do not use special tab delimiter for help string parsing (Stefano + Paolo)
- fix paths for when installing kselftest and running out-of-tree (Paolo)
- change vng to using running kernel instead of compiled kernel (Paolo)
- use multi-line string for QEMU_OPTS (Stefano)
- change timeout to 300s (Paolo)
- skip if tools are not found and use kselftests status codes (Paolo)
- remove build from vmtest.sh (Paolo)
- change 2222 -> SSH_HOST_PORT (Stefano)
- add tap-format output
- add vmtest.log to gitignore
- check for vsock_test binary and remind user to build it if missing
- create a proper build in makefile
- style fixes
- add ssh, timeout, and pkill to dependency check, just in case
- fix numerical comparison in conditionals
- check qemu pidfile exists before proceeding (avoid wasting time waiting for ssh)
- fix tracking of pass/fail bug
- fix stderr redirection bug
- Link to v3: https://lore.kernel.org/r/20250428-vsock-vmtest-v3-1-181af6163f3e@gmail.com
Changes in v3:
- use common conditional syntax for checking variables
- use return value instead of global rc
- fix typo TEST_HOST_LISTENER_PORT -> TEST_HOST_PORT_LISTENER
- use SIGTERM instead of SIGKILL on cleanup
- use peer-cid=1 for loopback
- change sleep delay times into globals
- fix test_vm_loopback logging
- add test selection in arguments
- make QEMU an argument
- check that vng binary is on path
- use QEMU variable
- change <tab><backslash> to <space><backslash>
- fix hardcoded file paths
- add comment in commit msg about script that vmtest.sh was based off of
- Add tools/testing/selftest/vsock/Makefile for kselftest
- Link to v2: https://lore.kernel.org/r/20250417-vsock-vmtest-v2-1-3901a27331e8@gmail.com
Changes in v2:
- add kernel oops and warnings checker
- change testname variable to use FUNCNAME
- fix spacing in test_vm_server_host_client
- add -s skip build option to vmtest.sh
- add test_vm_loopback
- pass port to vm_wait_for_listener
- fix indentation in vmtest.sh
- add vmci and hyperv to config
- changed whitespace from tabs to spaces in help string
- Link to v1: https://lore.kernel.org/r/20250410-vsock-vmtest-v1-1-f35a81dab98c@gmail.com
---
MAINTAINERS | 1 +
tools/testing/selftests/vsock/.gitignore | 2 +
tools/testing/selftests/vsock/Makefile | 16 ++
tools/testing/selftests/vsock/config | 114 ++++++++
tools/testing/selftests/vsock/settings | 1 +
tools/testing/selftests/vsock/vmtest.sh | 448 +++++++++++++++++++++++++++++++
6 files changed, 582 insertions(+)
diff --git a/MAINTAINERS b/MAINTAINERS
index 657a67f9031ef7798c19ac63e6383d4cb18a9e1f..3fbdd7bbfce7196a3cc7db70203317c6bd0e51fd 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -25751,6 +25751,7 @@ F: include/uapi/linux/vm_sockets.h
F: include/uapi/linux/vm_sockets_diag.h
F: include/uapi/linux/vsockmon.h
F: net/vmw_vsock/
+F: tools/testing/selftests/vsock/
F: tools/testing/vsock/
VMALLOC
diff --git a/tools/testing/selftests/vsock/.gitignore b/tools/testing/selftests/vsock/.gitignore
new file mode 100644
index 0000000000000000000000000000000000000000..9c5bf379480f829a14713d5f5dc7d525bc272e84
--- /dev/null
+++ b/tools/testing/selftests/vsock/.gitignore
@@ -0,0 +1,2 @@
+vmtest.log
+vsock_test
diff --git a/tools/testing/selftests/vsock/Makefile b/tools/testing/selftests/vsock/Makefile
new file mode 100644
index 0000000000000000000000000000000000000000..7ab4970e5e8a019be33f96a36f95c00573d7bfcf
--- /dev/null
+++ b/tools/testing/selftests/vsock/Makefile
@@ -0,0 +1,16 @@
+# SPDX-License-Identifier: GPL-2.0
+
+CURDIR := $(abspath .)
+TOOLSDIR := $(abspath ../../..)
+
+$(OUTPUT)/vsock_test: $(TOOLSDIR)/testing/vsock/vsock_test
+ install -m 755 $< $@
+
+$(TOOLSDIR)/testing/vsock/vsock_test:
+ $(MAKE) -C $(TOOLSDIR)/testing/vsock vsock_test
+
+TEST_PROGS += vmtest.sh
+TEST_GEN_FILES := vsock_test
+
+include ../lib.mk
+
diff --git a/tools/testing/selftests/vsock/config b/tools/testing/selftests/vsock/config
new file mode 100644
index 0000000000000000000000000000000000000000..3bffaaf98fff92dc0e3bc1286afa3d8d5d52f4c7
--- /dev/null
+++ b/tools/testing/selftests/vsock/config
@@ -0,0 +1,114 @@
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_BPF=y
+CONFIG_BPF_SYSCALL=y
+CONFIG_BPF_JIT=y
+CONFIG_HAVE_EBPF_JIT=y
+CONFIG_BPF_EVENTS=y
+CONFIG_FTRACE_SYSCALLS=y
+CONFIG_FUNCTION_TRACER=y
+CONFIG_HAVE_DYNAMIC_FTRACE=y
+CONFIG_DYNAMIC_FTRACE=y
+CONFIG_HAVE_KPROBES=y
+CONFIG_KPROBES=y
+CONFIG_KPROBE_EVENTS=y
+CONFIG_ARCH_SUPPORTS_UPROBES=y
+CONFIG_UPROBES=y
+CONFIG_UPROBE_EVENTS=y
+CONFIG_DEBUG_FS=y
+CONFIG_FW_CFG_SYSFS=y
+CONFIG_FW_CFG_SYSFS_CMDLINE=y
+CONFIG_DRM=y
+CONFIG_DRM_VIRTIO_GPU=y
+CONFIG_DRM_VIRTIO_GPU_KMS=y
+CONFIG_DRM_BOCHS=y
+CONFIG_VIRTIO_IOMMU=y
+CONFIG_SOUND=y
+CONFIG_SND=y
+CONFIG_SND_SEQUENCER=y
+CONFIG_SND_PCI=y
+CONFIG_SND_INTEL8X0=y
+CONFIG_SND_HDA_CODEC_REALTEK=y
+CONFIG_SECURITYFS=y
+CONFIG_CGROUP_BPF=y
+CONFIG_SQUASHFS=y
+CONFIG_SQUASHFS_XZ=y
+CONFIG_SQUASHFS_ZSTD=y
+CONFIG_FUSE_FS=y
+CONFIG_SERIO=y
+CONFIG_PCI=y
+CONFIG_INPUT=y
+CONFIG_INPUT_KEYBOARD=y
+CONFIG_KEYBOARD_ATKBD=y
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_X86_VERBOSE_BOOTUP=y
+CONFIG_VGA_CONSOLE=y
+CONFIG_FB=y
+CONFIG_FB_VESA=y
+CONFIG_FRAMEBUFFER_CONSOLE=y
+CONFIG_RTC_CLASS=y
+CONFIG_RTC_HCTOSYS=y
+CONFIG_RTC_DRV_CMOS=y
+CONFIG_HYPERVISOR_GUEST=y
+CONFIG_PARAVIRT=y
+CONFIG_KVM_GUEST=y
+CONFIG_KVM=y
+CONFIG_KVM_INTEL=y
+CONFIG_KVM_AMD=y
+CONFIG_VSOCKETS=y
+CONFIG_VSOCKETS_DIAG=y
+CONFIG_VSOCKETS_LOOPBACK=y
+CONFIG_VMWARE_VMCI_VSOCKETS=y
+CONFIG_VIRTIO_VSOCKETS=y
+CONFIG_VIRTIO_VSOCKETS_COMMON=y
+CONFIG_HYPERV_VSOCKETS=y
+CONFIG_VMWARE_VMCI=y
+CONFIG_VHOST_VSOCK=y
+CONFIG_HYPERV=y
+CONFIG_UEVENT_HELPER=n
+CONFIG_VIRTIO=y
+CONFIG_VIRTIO_PCI=y
+CONFIG_VIRTIO_MMIO=y
+CONFIG_VIRTIO_BALLOON=y
+CONFIG_NET=y
+CONFIG_NET_CORE=y
+CONFIG_NETDEVICES=y
+CONFIG_NETWORK_FILESYSTEMS=y
+CONFIG_INET=y
+CONFIG_NET_9P=y
+CONFIG_NET_9P_VIRTIO=y
+CONFIG_9P_FS=y
+CONFIG_VIRTIO_NET=y
+CONFIG_CMDLINE_OVERRIDE=n
+CONFIG_BINFMT_SCRIPT=y
+CONFIG_SHMEM=y
+CONFIG_TMPFS=y
+CONFIG_UNIX=y
+CONFIG_MODULE_SIG_FORCE=n
+CONFIG_DEVTMPFS=y
+CONFIG_TTY=y
+CONFIG_VT=y
+CONFIG_UNIX98_PTYS=y
+CONFIG_EARLY_PRINTK=y
+CONFIG_INOTIFY_USER=y
+CONFIG_BLOCK=y
+CONFIG_SCSI_LOWLEVEL=y
+CONFIG_SCSI=y
+CONFIG_SCSI_VIRTIO=y
+CONFIG_BLK_DEV_SD=y
+CONFIG_VIRTIO_CONSOLE=y
+CONFIG_WATCHDOG=y
+CONFIG_WATCHDOG_CORE=y
+CONFIG_I6300ESB_WDT=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
+CONFIG_OVERLAY_FS=y
+CONFIG_DAX=y
+CONFIG_DAX_DRIVER=y
+CONFIG_FS_DAX=y
+CONFIG_MEMORY_HOTPLUG=y
+CONFIG_MEMORY_HOTREMOVE=y
+CONFIG_ZONE_DEVICE=y
+CONFIG_FUSE_FS=y
+CONFIG_VIRTIO_FS=y
+CONFIG_VSOCKETS=y
+CONFIG_VIRTIO_VSOCKETS=y
diff --git a/tools/testing/selftests/vsock/settings b/tools/testing/selftests/vsock/settings
new file mode 100644
index 0000000000000000000000000000000000000000..694d70710ff08ac9fc91e9ecb5dbdadcf051f019
--- /dev/null
+++ b/tools/testing/selftests/vsock/settings
@@ -0,0 +1 @@
+timeout=300
diff --git a/tools/testing/selftests/vsock/vmtest.sh b/tools/testing/selftests/vsock/vmtest.sh
new file mode 100755
index 0000000000000000000000000000000000000000..e92e72a2c6480d918351bdd49baf106be4a29785
--- /dev/null
+++ b/tools/testing/selftests/vsock/vmtest.sh
@@ -0,0 +1,448 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+#
+# Copyright (c) 2025 Meta Platforms, Inc. and affiliates
+#
+# Dependencies:
+# * virtme-ng
+# * busybox-static (used by virtme-ng)
+# * qemu (used by virtme-ng)
+
+readonly SCRIPT_DIR="$(cd -P -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd -P)"
+
+source ${SCRIPT_DIR}/../kselftest/ktap_helpers.sh
+
+readonly TAP_PREFIX="# "
+readonly VSOCK_TEST=${SCRIPT_DIR}/vsock_test
+
+readonly TEST_GUEST_PORT=51000
+readonly TEST_HOST_PORT=50000
+readonly TEST_HOST_PORT_LISTENER=50001
+readonly SSH_GUEST_PORT=22
+readonly SSH_HOST_PORT=2222
+readonly VSOCK_CID=1234
+readonly WAIT_PERIOD=3
+readonly WAIT_PERIOD_MAX=60
+readonly WAIT_TOTAL=$(( WAIT_PERIOD * WAIT_PERIOD_MAX ))
+readonly QEMU_PIDFILE=$(mktemp /tmp/qemu_vsock_vmtest_XXXX.pid)
+
+# virtme-ng offers a netdev for ssh when using "--ssh", but we also need a
+# control port forwarded for vsock_test. Because virtme-ng doesn't support
+# adding an additional port to forward to the device created from "--ssh" and
+# virtme-init mistakenly sets identical IPs to the ssh device and additional
+# devices, we instead opt out of using --ssh, add the device manually, and also
+# add the kernel cmdline options that virtme-init uses to setup the interface.
+readonly QEMU_TEST_PORT_FWD="hostfwd=tcp::${TEST_HOST_PORT}-:${TEST_GUEST_PORT}"
+readonly QEMU_SSH_PORT_FWD="hostfwd=tcp::${SSH_HOST_PORT}-:${SSH_GUEST_PORT}"
+readonly QEMU_OPTS="\
+ -netdev user,id=n0,${QEMU_TEST_PORT_FWD},${QEMU_SSH_PORT_FWD} \
+ -device virtio-net-pci,netdev=n0 \
+ -device vhost-vsock-pci,guest-cid=${VSOCK_CID} \
+ --pidfile ${QEMU_PIDFILE} \
+"
+readonly KERNEL_CMDLINE="virtme.dhcp net.ifnames=0 biosdevname=0 virtme.ssh virtme_ssh_user=$USER"
+readonly LOG=$(mktemp /tmp/vsock_vmtest_XXXX.log)
+readonly TEST_NAMES=(vm_server_host_client vm_client_host_server vm_loopback)
+readonly TEST_DESCS=(
+ "Run vsock_test in server mode on the VM and in client mode on the host."
+ "Run vsock_test in client mode on the VM and in server mode on the host."
+ "Run vsock_test using the loopback transport in the VM."
+)
+
+VERBOSE=0
+
+usage() {
+ local name
+ local desc
+ local i
+
+ echo
+ echo "$0 [OPTIONS] [TEST]..."
+ echo "If no TEST argument is given, all tests will be run."
+ echo
+ echo "Options"
+ echo " -v: verbose output"
+ echo " -q: set the path to or name of qemu binary"
+ echo
+ echo "Available tests"
+
+ for ((i = 0; i < ${#TEST_NAMES[@]}; i++)); do
+ name=${TEST_NAMES[${i}]}
+ desc=${TEST_DESCS[${i}]}
+ printf "\t%-35s%-35s\n" "${name}" "${desc}"
+ done
+ echo
+
+ exit 1
+}
+
+die() {
+ echo "$*" >&2
+ exit ${KSFT_FAIL}
+}
+
+vm_ssh() {
+ ssh -q -o UserKnownHostsFile=/dev/null -p ${SSH_HOST_PORT} localhost $*
+ return $?
+}
+
+cleanup() {
+ if [[ -s "${QEMU_PIDFILE}" ]]; then
+ pkill -SIGTERM -F ${QEMU_PIDFILE} 2>&1 > /dev/null
+ fi
+
+ # If failure occurred during or before qemu start up, then we need
+ # to clean this up ourselves.
+ if [[ -e "${QEMU_PIDFILE}" ]]; then
+ rm "${QEMU_PIDFILE}"
+ fi
+}
+
+check_args() {
+ local found
+
+ for arg in "$@"; do
+ found=0
+ for name in "${TEST_NAMES[@]}"; do
+ if [[ "${name}" = "${arg}" ]]; then
+ found=1
+ break
+ fi
+ done
+
+ if [[ "${found}" -eq 0 ]]; then
+ echo "${arg} is not an available test" >&2
+ usage
+ fi
+ done
+
+ for arg in "$@"; do
+ if ! command -v > /dev/null "test_${arg}"; then
+ echo "Test ${arg} not found" >&2
+ usage
+ fi
+ done
+}
+
+check_deps() {
+ for dep in vng ${QEMU} busybox pkill ssh; do
+ if [[ ! -x "$(command -v ${dep})" ]]; then
+ echo -e "skip: dependency ${dep} not found!\n"
+ exit ${KSFT_SKIP}
+ fi
+ done
+
+ if [[ ! -x $(command -v ${VSOCK_TEST}) ]]; then
+ printf "skip: ${VSOCK_TEST} not found!"
+ printf " Please build the kselftest vsock target.\n"
+ exit ${KSFT_SKIP}
+ fi
+}
+
+vm_start() {
+ local VNG_OPTS=""
+ local logfile=/dev/null
+ local qemu
+
+ qemu=$(command -v ${QEMU})
+
+ if [[ "${VERBOSE}" = 1 ]]; then
+ VNG_OPTS="--verbose"
+ logfile=/dev/stdout
+ fi
+ vng \
+ $VNG_OPTS \
+ --run \
+ --qemu-opts="${QEMU_OPTS}" \
+ --qemu="${qemu}" \
+ --user root \
+ --append "${KERNEL_CMDLINE}" \
+ --rw &> ${logfile} &
+
+ timeout ${WAIT_TOTAL} \
+ bash -c 'while [[ ! -s '"${QEMU_PIDFILE}"' ]]; do sleep 1; done; exit 0'
+ if [[ ! $? -eq 0 ]]; then
+ die "failed to boot VM"
+ fi
+}
+
+vm_wait_for_ssh() {
+ local i
+
+ i=0
+ while [[ true ]]; do
+ if [[ ${i} -gt ${WAIT_PERIOD_MAX} ]]; then
+ die "Timed out waiting for guest ssh"
+ fi
+ vm_ssh -- true
+ if [[ $? -eq 0 ]]; then
+ break
+ fi
+ i=$(( i + 1 ))
+ sleep ${WAIT_PERIOD}
+ done
+}
+
+# derived from selftests/net/net_helper.sh
+wait_for_listener()
+{
+ local port=$1
+ local interval=$2
+ local max_intervals=$3
+ local protocol=tcp
+ local pattern
+ local i
+
+ pattern=":$(printf "%04X" "${port}") "
+
+ # for tcp protocol additionally check the socket state
+ [ "${protocol}" = "tcp" ] && pattern="${pattern}0A"
+ for i in $(seq "${max_intervals}"); do
+ if awk '{print $2" "$4}' /proc/net/"${protocol}"* | \
+ grep -q "${pattern}"; then
+ break
+ fi
+ sleep "${interval}"
+ done
+}
+
+vm_wait_for_listener() {
+ local port=$1
+
+ vm_ssh <<EOF
+$(declare -f wait_for_listener)
+wait_for_listener ${port} ${WAIT_PERIOD} ${WAIT_PERIOD_MAX}
+EOF
+}
+
+host_wait_for_listener() {
+ wait_for_listener ${TEST_HOST_PORT_LISTENER} ${WAIT_PERIOD} ${WAIT_PERIOD_MAX}
+}
+
+__log_stdin() {
+ cat | awk '{ printf "%s:\t%s\n","'"${prefix}"'", $0 }'
+}
+
+__log_args() {
+ echo "$*" | awk '{ printf "%s:\t%s\n","'"${prefix}"'", $0 }'
+}
+
+log() {
+ local prefix="$1"
+
+ shift
+ local redirect=
+ if [[ ${VERBOSE} -eq 0 ]]; then
+ redirect=/dev/null
+ else
+ redirect=/dev/stdout
+ fi
+
+ if [[ "$#" -eq 0 ]]; then
+ __log_stdin | tee -a ${LOG} > ${redirect}
+ else
+ __log_args | tee -a ${LOG} > ${redirect}
+ fi
+}
+
+log_setup() {
+ log "setup" "$@"
+}
+
+log_host() {
+ local testname=$1
+
+ shift
+ log "test:${testname}:host" "$@"
+}
+
+log_guest() {
+ local testname=$1
+
+ shift
+ log "test:${testname}:guest" "$@"
+}
+
+tap_prefix() {
+ sed -e "s/^/${TAP_PREFIX}/"
+}
+
+tap_output() {
+ if [[ ! -z "$TAP_PREFIX" ]]; then
+ read str
+ echo $str
+ fi
+}
+
+test_vm_server_host_client() {
+ local testname="${FUNCNAME[0]#test_}"
+
+ vm_ssh -- "${VSOCK_TEST}" \
+ --mode=server \
+ --control-port="${TEST_GUEST_PORT}" \
+ --peer-cid=2 \
+ 2>&1 | log_guest "${testname}" &
+
+ vm_wait_for_listener ${TEST_GUEST_PORT}
+
+ ${VSOCK_TEST} \
+ --mode=client \
+ --control-host=127.0.0.1 \
+ --peer-cid="${VSOCK_CID}" \
+ --control-port="${TEST_HOST_PORT}" 2>&1 | log_host "${testname}"
+
+ return $?
+}
+
+test_vm_client_host_server() {
+ local testname="${FUNCNAME[0]#test_}"
+
+ ${VSOCK_TEST} \
+ --mode "server" \
+ --control-port "${TEST_HOST_PORT_LISTENER}" \
+ --peer-cid "${VSOCK_CID}" 2>&1 | log_host "${testname}" &
+
+ host_wait_for_listener
+
+ vm_ssh -- "${VSOCK_TEST}" \
+ --mode=client \
+ --control-host=10.0.2.2 \
+ --peer-cid=2 \
+ --control-port="${TEST_HOST_PORT_LISTENER}" 2>&1 | log_guest "${testname}"
+
+ return $?
+}
+
+test_vm_loopback() {
+ local testname="${FUNCNAME[0]#test_}"
+ local port=60000 # non-forwarded local port
+
+ vm_ssh -- ${VSOCK_TEST} \
+ --mode=server \
+ --control-port="${port}" \
+ --peer-cid=1 2>&1 | log_guest "${testname}" &
+
+ vm_wait_for_listener ${port}
+
+ vm_ssh -- ${VSOCK_TEST} \
+ --mode=client \
+ --control-host="127.0.0.1" \
+ --control-port="${port}" \
+ --peer-cid=1 2>&1 | log_guest "${testname}"
+
+ return $?
+}
+
+run_test() {
+ local host_oops_cnt_before
+ local host_warn_cnt_before
+ local vm_oops_cnt_before
+ local vm_warn_cnt_before
+ local host_oops_cnt_after
+ local host_warn_cnt_after
+ local vm_oops_cnt_after
+ local vm_warn_cnt_after
+ local name
+ local rc
+
+ host_oops_cnt_before=$(dmesg | grep -c -i 'Oops')
+ host_warn_cnt_before=$(dmesg --level=warn | wc -l)
+ vm_oops_cnt_before=$(vm_ssh -- dmesg | grep -c -i 'Oops')
+ vm_warn_cnt_before=$(vm_ssh -- dmesg --level=warn | wc -l)
+
+ name=$(echo "${1}" | awk '{ print $1 }')
+ eval test_"${name}"
+ rc=$?
+
+ host_oops_cnt_after=$(dmesg | grep -i 'Oops' | wc -l)
+ if [[ ${host_oops_cnt_after} -gt ${host_oops_cnt_before} ]]; then
+ echo "FAIL: kernel oops detected on host" | log_host ${name}
+ rc=$KSFT_FAIL
+ fi
+
+ host_warn_cnt_after=$(dmesg --level=warn | wc -l)
+ if [[ ${host_warn_cnt_after} -gt ${host_warn_cnt_before} ]]; then
+ echo "FAIL: kernel warning detected on host" | log_host ${name}
+ rc=$KSFT_FAIL
+ fi
+
+ vm_oops_cnt_after=$(vm_ssh -- dmesg | grep -i 'Oops' | wc -l)
+ if [[ ${vm_oops_cnt_after} -gt ${vm_oops_cnt_before} ]]; then
+ echo "FAIL: kernel oops detected on vm" | log_host ${name}
+ rc=$KSFT_FAIL
+ fi
+
+ vm_warn_cnt_after=$(vm_ssh -- dmesg --level=warn | wc -l)
+ if [[ ${vm_warn_cnt_after} -gt ${vm_warn_cnt_before} ]]; then
+ echo "FAIL: kernel warning detected on vm" | log_host ${name}
+ rc=$KSFT_FAIL
+ fi
+
+ return ${rc}
+}
+
+QEMU="qemu-system-$(uname -m)"
+
+while getopts :hvsq: o
+do
+ case $o in
+ v) VERBOSE=1;;
+ q) QEMU=$OPTARG;;
+ h|*) usage;;
+ esac
+done
+shift $((OPTIND-1))
+
+trap cleanup EXIT
+
+if [[ ${#} -eq 0 ]]; then
+ ARGS=(${TEST_NAMES[@]})
+else
+ ARGS=($@)
+fi
+
+check_args "${ARGS[@]}"
+check_deps
+
+echo "TAP version 13" | tap_output
+echo "1..${#ARGS[@]}" | tap_output
+
+log_setup "Booting up VM"
+vm_start
+vm_wait_for_ssh
+log_setup "VM booted up"
+
+cnt_pass=0
+cnt_fail=0
+cnt_skip=0
+cnt_total=0
+exitcode=0
+for arg in "${ARGS[@]}"; do
+ run_test "${arg}"
+ rc=$?
+ if [[ ${rc} == $KSFT_PASS ]]; then
+ cnt_pass=$(( cnt_pass + 1 ))
+ echo "[PASS]" | tap_prefix
+ echo "ok ${cnt_total} ${arg}" | tap_output
+ elif [[ ${rc} == $KSFT_SKIP ]]; then
+ cnt_skip=$(( cnt_skip + 1 ))
+ echo "[SKIP]" | tap_prefix
+ echo "ok ${cnt_total} ${arg} # SKIP" | tap_output
+ exitcode=$KSFT_SKIP
+ elif [[ ${rc} == $KSFT_FAIL ]]; then
+ cnt_fail=$(( cnt_fail + 1 ))
+ echo "[FAIL]" | tap_prefix
+ echo "not ok ${cnt_total} ${arg} # exit=$rc" | tap_output
+ exitcode=$KSFT_FAIL
+ fi
+ cnt_total=$(( cnt_total + 1 ))
+done
+
+echo "SUMMARY: PASS=${cnt_pass} SKIP=${cnt_skip} FAIL=${cnt_fail}" | tap_prefix
+echo "Log: ${LOG}" | tap_prefix
+
+if [ $((cnt_pass + cnt_skip)) -eq "$KSFT_NUM_TESTS" ]; then
+ exit "$KSFT_PASS"
+else
+ exit "$KSFT_FAIL"
+fi
---
base-commit: 8066e388be48f1ad62b0449dc1d31a25489fa12a
change-id: 20250325-vsock-vmtest-b3a21d2102c2
Best regards,
--
Bobby Eshleman <bobbyeshleman(a)gmail.com>
5 months, 1 week
- 1
- 0
LFX Mentorship: Kselftest Patch Submission - Message Clarity Improvement in futex_requeue
by Shivam Sharma
Hi maintainers,
As part of the Kselftest task for the LFX Mentorship Program, I have
reviewed the futex selftest and made minor improvements to the message
clarity in `futex_requeue.c`.
Attached is the patch with the changes. I’ve also uploaded it to the
mentorship platform as instructed.
Please let me know if any changes are needed.
Thanks,
Shivam Sharma
10sharmashivam(a)gmail.com
5 months, 1 week
- 1
- 0
[PATCH] selftests: remove duplicated function definition
by Chen Linxuan
I failed to build this test on Ubuntu 24.04. Compiler complains that
function sys_open_tree has already been defined in
"../filesystems/overlayfs/wrappers.h".
Signed-off-by: Chen Linxuan <chenlinxuan(a)uniontech.com>
---
tools/testing/selftests/mount_setattr/mount_setattr_test.c | 5 -----
1 file changed, 5 deletions(-)
diff --git a/tools/testing/selftests/mount_setattr/mount_setattr_test.c b/tools/testing/selftests/mount_setattr/mount_setattr_test.c
index 48a000cabc971..eaa4e912120ab 100644
--- a/tools/testing/selftests/mount_setattr/mount_setattr_test.c
+++ b/tools/testing/selftests/mount_setattr/mount_setattr_test.c
@@ -173,11 +173,6 @@ static inline int sys_mount_setattr(int dfd, const char *path, unsigned int flag
#define AT_RECURSIVE 0x8000 /* Apply to the entire subtree */
#endif
-static inline int sys_open_tree(int dfd, const char *filename, unsigned int flags)
-{
- return syscall(__NR_open_tree, dfd, filename, flags);
-}
-
static ssize_t write_nointr(int fd, const void *buf, size_t count)
{
ssize_t ret;
--
2.43.0
5 months, 1 week
- 2
- 1
[PATCH] selftests/mm: Deduplicate default page size test results in thuge-gen
by Mark Brown
The thuge-gen test program runs mmap() and shmget() tests for both every
available page size and the default page size, resulting in two tests for
the default size. These tests are distinct since the flags in the default
case do not specify an explicit size, add the flags to the test name that
is logged to deduplicate.
Signed-off-by: Mark Brown <broonie(a)kernel.org>
---
tools/testing/selftests/mm/thuge-gen.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/mm/thuge-gen.c b/tools/testing/selftests/mm/thuge-gen.c
index cd5174d735be..a41bc1234b37 100644
--- a/tools/testing/selftests/mm/thuge-gen.c
+++ b/tools/testing/selftests/mm/thuge-gen.c
@@ -127,7 +127,7 @@ void test_mmap(unsigned long size, unsigned flags)
show(size);
ksft_test_result(size == getpagesize() || (before - after) == NUM_PAGES,
- "%s mmap %lu\n", __func__, size);
+ "%s mmap %lu %x\n", __func__, size, flags);
if (munmap(map, size * NUM_PAGES))
ksft_exit_fail_msg("%s: unmap %s\n", __func__, strerror(errno));
@@ -165,7 +165,7 @@ void test_shmget(unsigned long size, unsigned flags)
show(size);
ksft_test_result(size == getpagesize() || (before - after) == NUM_PAGES,
- "%s: mmap %lu\n", __func__, size);
+ "%s: mmap %lu %x\n", __func__, size, flags);
if (shmdt(map))
ksft_exit_fail_msg("%s: shmdt: %s\n", __func__, strerror(errno));
}
---
base-commit: 82f2b0b97b36ee3fcddf0f0780a9a0825d52fec3
change-id: 20250514-selfests-mm-thuge-gen-dup-7e1c40716091
Best regards,
--
Mark Brown <broonie(a)kernel.org>
5 months, 1 week
- 2
- 1
[PATCH] selftests/mm: Deduplicate test logging in test_mlock_lock()
by Mark Brown
The mlock2-tests test_mlock_lock() test reports two test results with
an identical string, one reporitng if it successfully locked a block of
memory and another reporting if the lock is still present after doing an
unlock (following a similar pattern to other tests in the same program).
This confuses test automation since the test string is used to deduplicate
tests, change the post unlock test to report "Unlocked" instead like the
other tests to fix this.
Signed-off-by: Mark Brown <broonie(a)kernel.org>
---
tools/testing/selftests/mm/mlock2-tests.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/testing/selftests/mm/mlock2-tests.c b/tools/testing/selftests/mm/mlock2-tests.c
index 7f0d50fa361d..3e90ff37e336 100644
--- a/tools/testing/selftests/mm/mlock2-tests.c
+++ b/tools/testing/selftests/mm/mlock2-tests.c
@@ -196,7 +196,7 @@ static void test_mlock_lock(void)
ksft_exit_fail_msg("munlock(): %s\n", strerror(errno));
}
- ksft_test_result(!unlock_lock_check(map), "%s: Locked\n", __func__);
+ ksft_test_result(!unlock_lock_check(map), "%s: Unlocked\n", __func__);
munmap(map, 2 * page_size);
}
---
base-commit: 82f2b0b97b36ee3fcddf0f0780a9a0825d52fec3
change-id: 20250514-selftest-mm-mlock2-dup-277d586bb29d
Best regards,
--
Mark Brown <broonie(a)kernel.org>
5 months, 1 week
- 2
- 1
[PATCH v15 net-next 0/5] DUALPI2 patch
by chia-yu.chang＠nokia-bell-labs.com
From: Chia-Yu Chang <chia-yu.chang(a)nokia-bell-labs.com>
Hello,
Please find the DualPI2 patch v14.
v15 (09-May-2025)
- Add enum of TCA_DUALPI2_ECN_MASK_CLA_ECT to remove potential leakeage in #1 (Simon Horman <horms(a)kernel.org>)
- Fix one typo in comment of #2
- Update tc.yaml in #5 to aligh with the updated enum of pkt_sched.h
v14 (05-May-2025)
- Modify tc.yaml: (1) Replace flags with enum and remove enum-as-flags, (2) Remove credit-queue in xstats, and (3) Change attribute types (Donald Hunter <donald.hun
- Add enum and fix the ordering of variables in pkt_sched.h to align with the modified tc.yaml (Donald Hunter <donald.hunter(a)gmail.com>)
- Add validators for DROP_OVERLOAD, DROP_EARLY, ECN_MASK, and SPLIT_GSO in sch_dualpi2.c (Donald Hunter <donald.hunter(a)gmail.com>)
- Update dualpi2.json to align with the updated variable order in pkt_sched.h.
- Reorder patches (Donald Hunter <donald.hunter(a)gmail.com>)
v13 (26-Apr-2025)
- Use dashes in member names to follow YNL conventions in tc.yaml (Donald Hunter <donald.hunter(a)gmail.com>)
- Define enumerations separately for flags of drop-early, drop-overload, ecn-mask, credit-queue in tc.yaml (Donald Hunter <donald.hunter(a)gmail.com>)
- Change the types of split-gso and step-packets into flag in tc.yaml (Donald Hunter <donald.hunter(a)gmail.com>)
- Revert to u32/u8 types for tc-dualpi2-xstats members in tc.yaml (Donald Hunter <donald.hunter(a)gmail.com>)
- Add new test cases in tc-tests/qdiscs/dualpi2.json to cover all dualpi2 paramters (Donald Hunter <donald.hunter(a)gmail.com>)
- Change the type of TCA_DUALPI2_STEP_PACKETS into NLA_FLAG (Donald Hunter <donald.hunter(a)gmail.com>)
v12 (22-Apr-2025)
- Remove anonymous struct in sch_dualpi2.c (Paolo Abeni <pabeni(a)redhat.com>)
- Replace u32/u8 with uint and s32 with int in tc spec document (Paolo Abeni <pabeni(a)redhat.com>)
- Introduce get_memory_limit function to handle potential overflow when multipling limit with MTU (Paolo Abeni <pabeni(a)redhat.com>)
- Double the packet length to further include packet overhead in memory_limit (Paolo Abeni <pabeni(a)redhat.com>)
- Remove the check of qdisc_qlen(sch) when calling qdisc_tree_reduce_backlog (Paolo Abeni <pabeni(a)redhat.com>)
v11 (15-Apr-2025)
- Replace hstimer_init with hstimer_setup in sch_dualpi2.c
v10 (25-Mar-2025)
- Remove leftover include in include/linux/netdevice.h and anonymous struct in sch_dualpi2.c (Paolo Abeni <pabeni(a)redhat.com>)
- Use kfree_skb_reason() and add SKB_DROP_REASON_DUALPI2_STEP_DROP drop reason (Paolo Abeni <pabeni(a)redhat.com>)
- Split sch_dualpi2.c into 3 patches (and overall 5 patches): Struct definition & parsing, Dump stats & configuration, Enqueue/Dequeue (Paolo Abeni <pabeni(a)redhat.com>)
v9 (16-Mar-2025)
- Fix mem_usage error in previous version
- Add min_qlen_step to the dualpi2 attribute as the minimum queue length in number of packets in the L-queue to start step threshold marking.
In previous versions, this value was fixed to 2, so the step threshold was applied to mark packets in the L queue only when the queue length of the L queue was greater than or equal to 2 packets.
This will cause larger queuing delays for L4S traffic at low rates (<20Mbps). So we parameterize it and change the default value to 0.
Comparison of tcp_1down run 'HTB 20Mbit + DUALPI2 + 10ms base delay'
Old versions:
avg median # data pts
Ping (ms) ICMP : 11.55 11.70 ms 350
TCP upload avg : 18.96 N/A Mbits/s 350
TCP upload sum : 18.96 N/A Mbits/s 350
New version (v9):
avg median # data pts
Ping (ms) ICMP : 10.81 10.70 ms 350
TCP upload avg : 18.91 N/A Mbits/s 350
TCP upload sum : 18.91 N/A Mbits/s 350
Comparison of tcp_1down run 'HTB 10Mbit + DUALPI2 + 10ms base delay'
Old versions:
avg median # data pts
Ping (ms) ICMP : 12.61 12.80 ms 350
TCP upload avg : 9.48 N/A Mbits/s 350
TCP upload sum : 9.48 N/A Mbits/s 350
New version (v9):
avg median # data pts
Ping (ms) ICMP : 11.06 10.80 ms 350
TCP upload avg : 9.43 N/A Mbits/s 350
TCP upload sum : 9.43 N/A Mbits/s 350
Comparison of tcp_1down run 'HTB 10Mbit + DUALPI2 + 10ms base delay'
Old versions:
avg median # data pts
Ping (ms) ICMP : 40.86 37.45 ms 350
TCP upload avg : 0.88 N/A Mbits/s 350
TCP upload sum : 0.88 N/A Mbits/s 350
TCP upload::1 : 0.88 0.97 Mbits/s 350
New version (v9):
avg median # data pts
Ping (ms) ICMP : 11.07 10.40 ms 350
TCP upload avg : 0.55 N/A Mbits/s 350
TCP upload sum : 0.55 N/A Mbits/s 350
TCP upload::1 : 0.55 0.59 Mbits/s 350
v8 (11-Mar-2025)
- Fix warning messages in v7
v7 (07-Mar-2025)
- Separate into 3 patches to avoid mixing changes of documentation, selftest, and code. (Cong Wang <xiyou.wangcong(a)gmail.com>)
v6 (04-Mar-2025)
- Add modprobe for dulapi2 in tc-testing script tc-testing/tdc.sh (Jakub Kicinski <kuba(a)kernel.org>)
- Update test cases in dualpi2.json
- Update commit message
v5 (22-Feb-2025)
- A comparison was done between MQ + DUALPI2, MQ + FQ_PIE, MQ + FQ_CODEL:
Unshaped 1gigE with 4 download streams test:
- Summary of tcp_4down run 'MQ + FQ_CODEL':
avg median # data pts
Ping (ms) ICMP : 1.19 1.34 ms 349
TCP download avg : 235.42 N/A Mbits/s 349
TCP download sum : 941.68 N/A Mbits/s 349
TCP download::1 : 235.19 235.39 Mbits/s 349
TCP download::2 : 235.03 235.35 Mbits/s 349
TCP download::3 : 236.89 235.44 Mbits/s 349
TCP download::4 : 234.57 235.19 Mbits/s 349
- Summary of tcp_4down run 'MQ + FQ_PIE'
avg median # data pts
Ping (ms) ICMP : 1.21 1.37 ms 350
TCP download avg : 235.42 N/A Mbits/s 350
TCP download sum : 941.61 N/A Mbits/s 350
TCP download::1 : 232.54 233.13 Mbits/s 350
TCP download::2 : 232.52 232.80 Mbits/s 350
TCP download::3 : 233.14 233.78 Mbits/s 350
TCP download::4 : 243.41 241.48 Mbits/s 350
- Summary of tcp_4down run 'MQ + DUALPI2'
avg median # data pts
Ping (ms) ICMP : 1.19 1.34 ms 349
TCP download avg : 235.42 N/A Mbits/s 349
TCP download sum : 941.68 N/A Mbits/s 349
TCP download::1 : 235.19 235.39 Mbits/s 349
TCP download::2 : 235.03 235.35 Mbits/s 349
TCP download::3 : 236.89 235.44 Mbits/s 349
TCP download::4 : 234.57 235.19 Mbits/s 349
Unshaped 1gigE with 128 download streams test:
- Summary of tcp_128down run 'MQ + FQ_CODEL':
avg median # data pts
Ping (ms) ICMP : 1.88 1.86 ms 350
TCP download avg : 7.39 N/A Mbits/s 350
TCP download sum : 946.47 N/A Mbits/s 350
- Summary of tcp_128down run 'MQ + FQ_PIE':
avg median # data pts
Ping (ms) ICMP : 1.88 1.86 ms 350
TCP download avg : 7.39 N/A Mbits/s 350
TCP download sum : 946.47 N/A Mbits/s 350
- Summary of tcp_128down run 'MQ + DUALPI2':
avg median # data pts
Ping (ms) ICMP : 1.88 1.86 ms 350
TCP download avg : 7.39 N/A Mbits/s 350
TCP download sum : 946.47 N/A Mbits/s 350
Unshaped 10gigE with 4 download streams test:
- Summary of tcp_4down run 'MQ + FQ_CODEL':
avg median # data pts
Ping (ms) ICMP : 0.22 0.23 ms 350
TCP download avg : 2354.08 N/A Mbits/s 350
TCP download sum : 9416.31 N/A Mbits/s 350
TCP download::1 : 2353.65 2352.81 Mbits/s 350
TCP download::2 : 2354.54 2354.21 Mbits/s 350
TCP download::3 : 2353.56 2353.78 Mbits/s 350
TCP download::4 : 2354.56 2354.45 Mbits/s 350
- Summary of tcp_4down run 'MQ + FQ_PIE':
avg median # data pts
Ping (ms) ICMP : 0.20 0.19 ms 350
TCP download avg : 2354.76 N/A Mbits/s 350
TCP download sum : 9419.04 N/A Mbits/s 350
TCP download::1 : 2354.77 2353.89 Mbits/s 350
TCP download::2 : 2353.41 2354.29 Mbits/s 350
TCP download::3 : 2356.18 2354.19 Mbits/s 350
TCP download::4 : 2354.68 2353.15 Mbits/s 350
- Summary of tcp_4down run 'MQ + DUALPI2':
avg median # data pts
Ping (ms) ICMP : 0.24 0.24 ms 350
TCP download avg : 2354.11 N/A Mbits/s 350
TCP download sum : 9416.43 N/A Mbits/s 350
TCP download::1 : 2354.75 2353.93 Mbits/s 350
TCP download::2 : 2353.15 2353.75 Mbits/s 350
TCP download::3 : 2353.49 2353.72 Mbits/s 350
TCP download::4 : 2355.04 2353.73 Mbits/s 350
Unshaped 10gigE with 128 download streams test:
- Summary of tcp_128down run 'MQ + FQ_CODEL':
avg median # data pts
Ping (ms) ICMP : 7.57 8.69 ms 350
TCP download avg : 73.97 N/A Mbits/s 350
TCP download sum : 9467.82 N/A Mbits/s 350
- Summary of tcp_128down run 'MQ + FQ_PIE':
avg median # data pts
Ping (ms) ICMP : 7.82 8.91 ms 350
TCP download avg : 73.97 N/A Mbits/s 350
TCP download sum : 9468.42 N/A Mbits/s 350
- Summary of tcp_128down run 'MQ + DUALPI2':
avg median # data pts
Ping (ms) ICMP : 6.87 7.93 ms 350
TCP download avg : 73.95 N/A Mbits/s 350
TCP download sum : 9465.87 N/A Mbits/s 350
From the results shown above, we see small differences between combinations.
- Update commit message to include results of no_split_gso and split_gso (Dave Taht <dave.taht(a)gmail.com> and Paolo Abeni <pabeni(a)redhat.com>)
- Add memlimit in the dualpi2 attribute, and add memory_used, max_memory_used, memory_limit in dualpi2 stats (Dave Taht <dave.taht(a)gmail.com>)
- Update note in sch_dualpi2.c related to BBRv3 status (Dave Taht <dave.taht(a)gmail.com>)
- Update license identifier (Dave Taht <dave.taht(a)gmail.com>)
- Add selftest in tools/testing/selftests/tc-testing (Cong Wang <xiyou.wangcong(a)gmail.com>)
- Use netlink policies for parameter checks (Jamal Hadi Salim <jhs(a)mojatatu.com>)
- Modify texts & fix typos in Documentation/netlink/specs/tc.yaml (Dave Taht <dave.taht(a)gmail.com>)
- Add descriptions of packet counter statistics and the reset function of sch_dualpi2.c
- Fix step_thresh in packets
- Update code comments in sch_dualpi2.c
v4 (22-Oct-2024)
- Update statement in Kconfig for DualPI2 (Stephen Hemminger <stephen(a)networkplumber.org>)
- Put a blank line after #define in sch_dualpi2.c (Stephen Hemminger <stephen(a)networkplumber.org>)
- Fix line length warning.
v3 (19-Oct-2024)
- Fix compilaiton error
- Update Documentation/netlink/specs/tc.yaml (Jakub Kicinski <kuba(a)kernel.org>)
v2 (18-Oct-2024)
- Add Documentation/netlink/specs/tc.yaml (Jakub Kicinski <kuba(a)kernel.org>)
- Use dualpi2 instead of skb prefix (Jamal Hadi Salim <jhs(a)mojatatu.com>)
- Replace nla_parse_nested_deprecated with nla_parse_nested (Jamal Hadi Salim <jhs(a)mojatatu.com>)
- Fix line length warning
For more details of DualPI2, please refer IETF RFC9332 (https://datatracker.ietf.org/doc/html/rfc9332).
Best regards,
Chia-Yu
Chia-Yu Chang (4):
sched: Struct definition and parsing of dualpi2 qdisc
sched: Dump configuration and statistics of dualpi2 qdisc
selftests/tc-testing: Add selftests for qdisc DualPI2
Documentation: netlink: specs: tc: Add DualPI2 specification
Koen De Schepper (1):
sched: Add enqueue/dequeue of dualpi2 qdisc
Documentation/netlink/specs/tc.yaml | 156 +++
include/net/dropreason-core.h | 6 +
include/uapi/linux/pkt_sched.h | 68 +
net/sched/Kconfig | 12 +
net/sched/Makefile | 1 +
net/sched/sch_dualpi2.c | 1106 +++++++++++++++++
tools/testing/selftests/tc-testing/config | 1 +
.../tc-testing/tc-tests/qdiscs/dualpi2.json | 254 ++++
tools/testing/selftests/tc-testing/tdc.sh | 1 +
9 files changed, 1605 insertions(+)
create mode 100644 net/sched/sch_dualpi2.c
create mode 100644 tools/testing/selftests/tc-testing/tc-tests/qdiscs/dualpi2.json
--
2.34.1
5 months, 1 week
- 2
- 9
[PATCH] selftests/memfd: clean Makefile
by Chen Linxuan
When writing a test for fusectl, I referred to this Makefile as a
reference for creating a FUSE daemon in the selftests.
While doing so, I noticed that there is a minor issue in the Makefile.
The fuse_mnt.c file is not actually compiled into fuse_mnt.o,
and the code setting CFLAGS for it never takes effect.
The reason fuse_mnt compiles successfully is because CFLAGS is set
at the very beginning of the file.
Signed-off-by: Chen Linxuan <chenlinxuan(a)uniontech.com>
---
tools/testing/selftests/memfd/Makefile | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/tools/testing/selftests/memfd/Makefile b/tools/testing/selftests/memfd/Makefile
index 163b6f68631c4..e9b886c65153d 100644
--- a/tools/testing/selftests/memfd/Makefile
+++ b/tools/testing/selftests/memfd/Makefile
@@ -1,5 +1,4 @@
# SPDX-License-Identifier: GPL-2.0
-CFLAGS += -D_FILE_OFFSET_BITS=64
CFLAGS += $(KHDR_INCLUDES)
TEST_GEN_PROGS := memfd_test
@@ -16,10 +15,9 @@ ifeq ($(VAR_LDLIBS),)
VAR_LDLIBS := -lfuse -pthread
endif
-fuse_mnt.o: CFLAGS += $(VAR_CFLAGS)
-
include ../lib.mk
+$(OUTPUT)/fuse_mnt: CFLAGS += $(VAR_CFLAGS)
$(OUTPUT)/fuse_mnt: LDLIBS += $(VAR_LDLIBS)
$(OUTPUT)/memfd_test: memfd_test.c common.c
--
2.43.0
5 months, 1 week
- 1
- 0
[PATCH bpf-next v6 0/5] Replace CONFIG_DMABUF_SYSFS_STATS with BPF
by T.J. Mercier
Until CONFIG_DMABUF_SYSFS_STATS was added [1] it was only possible to
perform per-buffer accounting with debugfs which is not suitable for
production environments. Eventually we discovered the overhead with
per-buffer sysfs file creation/removal was significantly impacting
allocation and free times, and exacerbated kernfs lock contention. [2]
dma_buf_stats_setup() is responsible for 39% of single-page buffer
creation duration, or 74% of single-page dma_buf_export() duration when
stressing dmabuf allocations and frees.
I prototyped a change from per-buffer to per-exporter statistics with a
RCU protected list of exporter allocations that accommodates most (but
not all) of our use-cases and avoids almost all of the sysfs overhead.
While that adds less overhead than per-buffer sysfs, and less even than
the maintenance of the dmabuf debugfs_list, it's still *additional*
overhead on top of the debugfs_list and doesn't give us per-buffer info.
This series uses the existing dmabuf debugfs_list to implement a BPF
dmabuf iterator, which adds no overhead to buffer allocation/free and
provides per-buffer info. The list has been moved outside of
CONFIG_DEBUG_FS scope so that it is always populated. The BPF program
loaded by userspace that extracts per-buffer information gets to define
its own interface which avoids the lack of ABI stability with debugfs.
This will allow us to replace our use of CONFIG_DMABUF_SYSFS_STATS, and
the plan is to remove it from the kernel after the next longterm stable
release.
[1] https://lore.kernel.org/linux-media/20201210044400.1080308-1-hridya@google.…
[2] https://lore.kernel.org/all/20220516171315.2400578-1-tjmercier@google.com
v1: https://lore.kernel.org/all/20250414225227.3642618-1-tjmercier@google.com
v1 -> v2:
Make the DMA buffer list independent of CONFIG_DEBUG_FS per Christian
König
Add CONFIG_DMA_SHARED_BUFFER check to kernel/bpf/Makefile per kernel
test robot
Use BTF_ID_LIST_SINGLE instead of BTF_ID_LIST_GLOBAL_SINGLE per Song Liu
Fixup comment style, mixing code/declarations, and use ASSERT_OK_FD in
selftest per Song Liu
Add BPF_ITER_RESCHED feature to bpf_dmabuf_reg_info per Alexei
Starovoitov
Add open-coded iterator and selftest per Alexei Starovoitov
Add a second test buffer from the system dmabuf heap to selftests
Use the BPF program we'll use in production for selftest per Alexei
Starovoitov
https://r.android.com/c/platform/system/bpfprogs/+/3616123/2/dmabufIter.c
https://r.android.com/c/platform/system/memory/libmeminfo/+/3614259/1/libdm…
v2: https://lore.kernel.org/all/20250504224149.1033867-1-tjmercier@google.com
v2 -> v3:
Rebase onto bpf-next/master
Move get_next_dmabuf() into drivers/dma-buf/dma-buf.c, along with the
new get_first_dmabuf(). This avoids having to expose the dmabuf list
and mutex to the rest of the kernel, and keeps the dmabuf mutex
operations near each other in the same file. (Christian König)
Add Christian's RB to dma-buf: Rename debugfs symbols
Drop RFC: dma-buf: Remove DMA-BUF statistics
v3: https://lore.kernel.org/all/20250507001036.2278781-1-tjmercier@google.com
v3 -> v4:
Fix selftest BPF program comment style (not kdoc) per Alexei Starovoitov
Fix dma-buf.c kdoc comment style per Alexei Starovoitov
Rename get_first_dmabuf / get_next_dmabuf to dma_buf_iter_begin /
dma_buf_iter_next per Christian König
Add Christian's RB to bpf: Add dmabuf iterator
v4: https://lore.kernel.org/all/20250508182025.2961555-1-tjmercier@google.com
v4 -> v5:
Add Christian's Acks to all patches
Add Song Liu's Acks
Move BTF_ID_LIST_SINGLE and DEFINE_BPF_ITER_FUNC closer to usage per
Song Liu
Fix open-coded iterator comment style per Song Liu
Move iterator termination check to its own subtest per Song Liu
Rework selftest buffer creation per Song Liu
Fix spacing in sanitize_string per BPF CI
v5: https://lore.kernel.org/all/20250512174036.266796-1-tjmercier@google.com
v5 -> v6:
Song Liu:
Init test buffer FDs to -1
Zero-init udmabuf_create for future proofing
Bail early for iterator fd/FILE creation failure
Dereference char ptr to check for NUL in sanitize_string()
Move map insertion from create_test_buffers() to test_dmabuf_iter()
Add ACK to selftests/bpf: Add test for open coded dmabuf_iter
T.J. Mercier (5):
dma-buf: Rename debugfs symbols
bpf: Add dmabuf iterator
bpf: Add open coded dmabuf iterator
selftests/bpf: Add test for dmabuf_iter
selftests/bpf: Add test for open coded dmabuf_iter
drivers/dma-buf/dma-buf.c | 98 ++++--
include/linux/dma-buf.h | 4 +-
kernel/bpf/Makefile | 3 +
kernel/bpf/dmabuf_iter.c | 150 +++++++++
kernel/bpf/helpers.c | 5 +
.../testing/selftests/bpf/bpf_experimental.h | 5 +
tools/testing/selftests/bpf/config | 3 +
.../selftests/bpf/prog_tests/dmabuf_iter.c | 285 ++++++++++++++++++
.../testing/selftests/bpf/progs/dmabuf_iter.c | 91 ++++++
9 files changed, 622 insertions(+), 22 deletions(-)
create mode 100644 kernel/bpf/dmabuf_iter.c
create mode 100644 tools/testing/selftests/bpf/prog_tests/dmabuf_iter.c
create mode 100644 tools/testing/selftests/bpf/progs/dmabuf_iter.c
base-commit: 43745d11bfd9683abdf08ad7a5cc403d6a9ffd15
--
2.49.0.1045.g170613ef41-goog
5 months, 1 week
- 2
- 9
[PATCH v6 net-next 00/15] AccECN protocol patch series
by chia-yu.chang＠nokia-bell-labs.com
From: Chia-Yu Chang <chia-yu.chang(a)nokia-bell-labs.com>
Hello,
Please find the v6:
v5 (09-May-2025)
- Add #3 to utilize exisintg holes of tcp_sock_write_txrx group for later patches (#4, #9, #10) with new u8 members (Paolo Abeni <pabeni(a)redhat.com>)
- Add pahole outcomes before and after commit in #4, #5, #6, #9, #10, #15 (Paolo Abeni <pabeni(a)redhat.com>)
- Define new helper function tcp_send_ack_reflect_ect() for sending ACK with reflected ECT in #5 (Paolo Abeni <pabeni(a)redhat.com>)
- Add comments for function tcp_ecn_rcv_synack() in #5 (Paolo Abeni <pabeni(a)redhat.com>)
- Add enum/define to be used by sysctl_tcp_ecn in #5, sysctl_tcp_ecn_option in #9, and sysctl_tcp_ecn_option_beacon in #10 (Paolo Abeni <pabeni(a)redhat.com>)
- Move accecn_fail_mode and saw_accecn_opt in #5 and #11 to use exisintg holes of tcp_sock (Paolo Abeni <pabeni(a)redhat.com>)
- Change data type of new members of tcp_request_sock and move them to the end of struct in #5 and #11 (Paolo Abeni <pabeni(a)redhat.com>)
- Move new members of tcp_info to the end of struct in #6 (Paolo Abeni <pabeni(a)redhat.com>)
- Merge previous #7 into #9 (Paolo Abeni <pabeni(a)redhat.com>)
- Mask ecnfield with INET_ECN_MASK to remove WARN_ONCE in #9 (Paolo Abeni <pabeni(a)redhat.com>)
- Reduce the indentation levels for reabability in #9 and #10 (Paolo Abeni <pabeni(a)redhat.com>)
- Move delivered_ecn_bytes to the RX group in #9, accecn_opt_tstamp to the TX group in #10, pkts_acked_ewma to the RX group in #15 (Paolo Abeni <pabeni(a)redhat.com>)
- Add changes in Documentation/networking/net_cachelines/tcp_sock.rst for new tcp_sock members in #3, #5, #6, #9, #10, #15
v5 (22-Apr-2025)
- Further fix for 32-bit ARM alignment in tcp.c (Simon Horman <horms(a)kernel.org>)
v4 (18-Apr-2025)
- Fix 32-bit ARM assertion for alignment requirement (Simon Horman <horms(a)kernel.org>)
v3 (14-Apr-2025)
- Fix patch apply issue in v2 (Jakub Kicinski <kuba(a)kernel.org>)
v2 (18-Mar-2025)
- Add one missing patch from the previous AccECN protocol preparation patch series to this patch series.
The full patch series can be found in
https://github.com/L4STeam/linux-net-next/commits/upstream_l4steam/
The Accurate ECN draft can be found in
https://datatracker.ietf.org/doc/html/draft-ietf-tcpm-accurate-ecn-28
Best regards,
Chia-Yu
Chia-Yu Chang (2):
tcp: reorganize tcp_sock_write_txrx group for variables later
tcp: accecn: AccECN option failure handling
Ilpo Järvinen (13):
tcp: reorganize SYN ECN code
tcp: fast path functions later
tcp: AccECN core
tcp: accecn: AccECN negotiation
tcp: accecn: add AccECN rx byte counters
tcp: accecn: AccECN needs to know delivered bytes
tcp: sack option handling improvements
tcp: accecn: AccECN option
tcp: accecn: AccECN option send control
tcp: accecn: AccECN option ceb/cep heuristic
tcp: accecn: AccECN ACE field multi-wrap heuristic
tcp: accecn: try to fit AccECN option with SACK
tcp: try to avoid safer when ACKs are thinned
.../networking/net_cachelines/tcp_sock.rst | 14 +
include/linux/tcp.h | 34 +-
include/net/netns/ipv4.h | 2 +
include/net/tcp.h | 221 ++++++-
include/uapi/linux/tcp.h | 7 +
net/ipv4/syncookies.c | 3 +
net/ipv4/sysctl_net_ipv4.c | 19 +
net/ipv4/tcp.c | 30 +-
net/ipv4/tcp_input.c | 608 +++++++++++++++++-
net/ipv4/tcp_ipv4.c | 7 +-
net/ipv4/tcp_minisocks.c | 92 ++-
net/ipv4/tcp_output.c | 297 ++++++++-
net/ipv6/syncookies.c | 1 +
net/ipv6/tcp_ipv6.c | 1 +
14 files changed, 1237 insertions(+), 99 deletions(-)
--
2.34.1
5 months, 1 week
- 3
- 17
[PATCH v2] selftests: riscv: add misaligned access testing
by Clément Léger
This selftest tests all the currently emulated instructions (except for
the RV32 compressed ones which are left as a future exercise for a RV32
user). For the FPU instructions, all the FPU registers are tested.
Signed-off-by: Clément Léger <cleger(a)rivosinc.com>
---
Note: This test can be executed with the FWFT series [1] or using an SBI
firmware that delegates misaligned traps by default. If using QEMU,
you will need the patches mentionned at [2] so that misaligned accesses
will generate a trap.
Note: This commit was part of a series [3] that was partially merged.
Link: https://lore.kernel.org/all/20250424173204.1948385-1-cleger@rivosinc.com/ [1]
Link: https://lore.kernel.org/all/20241211211933.198792-1-fkonrad@amd.com/ [2]
Link: https://lore.kernel.org/linux-riscv/20250422162324.956065-1-cleger@rivosinc… [3]
V2:
- Fix commit description
- FIx a few errors reported by checkpatch.pl
---
tools/testing/selftests/riscv/Makefile | 2 +-
.../selftests/riscv/misaligned/.gitignore | 1 +
.../selftests/riscv/misaligned/Makefile | 12 +
.../selftests/riscv/misaligned/common.S | 33 +++
.../testing/selftests/riscv/misaligned/fpu.S | 180 +++++++++++++
tools/testing/selftests/riscv/misaligned/gp.S | 103 +++++++
.../selftests/riscv/misaligned/misaligned.c | 254 ++++++++++++++++++
7 files changed, 584 insertions(+), 1 deletion(-)
create mode 100644 tools/testing/selftests/riscv/misaligned/.gitignore
create mode 100644 tools/testing/selftests/riscv/misaligned/Makefile
create mode 100644 tools/testing/selftests/riscv/misaligned/common.S
create mode 100644 tools/testing/selftests/riscv/misaligned/fpu.S
create mode 100644 tools/testing/selftests/riscv/misaligned/gp.S
create mode 100644 tools/testing/selftests/riscv/misaligned/misaligned.c
diff --git a/tools/testing/selftests/riscv/Makefile b/tools/testing/selftests/riscv/Makefile
index 099b8c1f46f8..95a98ceeb3b3 100644
--- a/tools/testing/selftests/riscv/Makefile
+++ b/tools/testing/selftests/riscv/Makefile
@@ -5,7 +5,7 @@
ARCH ?= $(shell uname -m 2>/dev/null || echo not)
ifneq (,$(filter $(ARCH),riscv))
-RISCV_SUBTARGETS ?= abi hwprobe mm sigreturn vector
+RISCV_SUBTARGETS ?= abi hwprobe mm sigreturn vector misaligned
else
RISCV_SUBTARGETS :=
endif
diff --git a/tools/testing/selftests/riscv/misaligned/.gitignore b/tools/testing/selftests/riscv/misaligned/.gitignore
new file mode 100644
index 000000000000..5eff15a1f981
--- /dev/null
+++ b/tools/testing/selftests/riscv/misaligned/.gitignore
@@ -0,0 +1 @@
+misaligned
diff --git a/tools/testing/selftests/riscv/misaligned/Makefile b/tools/testing/selftests/riscv/misaligned/Makefile
new file mode 100644
index 000000000000..1aa40110c50d
--- /dev/null
+++ b/tools/testing/selftests/riscv/misaligned/Makefile
@@ -0,0 +1,12 @@
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (C) 2021 ARM Limited
+# Originally tools/testing/arm64/abi/Makefile
+
+CFLAGS += -I$(top_srcdir)/tools/include
+
+TEST_GEN_PROGS := misaligned
+
+include ../../lib.mk
+
+$(OUTPUT)/misaligned: misaligned.c fpu.S gp.S
+ $(CC) -g3 -static -o$@ -march=rv64imafdc $(CFLAGS) $(LDFLAGS) $^
diff --git a/tools/testing/selftests/riscv/misaligned/common.S b/tools/testing/selftests/riscv/misaligned/common.S
new file mode 100644
index 000000000000..8fa00035bd5d
--- /dev/null
+++ b/tools/testing/selftests/riscv/misaligned/common.S
@@ -0,0 +1,33 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2025 Rivos Inc.
+ *
+ * Authors:
+ * Clément Léger <cleger(a)rivosinc.com>
+ */
+
+.macro lb_sb temp, offset, src, dst
+ lb \temp, \offset(\src)
+ sb \temp, \offset(\dst)
+.endm
+
+.macro copy_long_to temp, src, dst
+ lb_sb \temp, 0, \src, \dst,
+ lb_sb \temp, 1, \src, \dst,
+ lb_sb \temp, 2, \src, \dst,
+ lb_sb \temp, 3, \src, \dst,
+ lb_sb \temp, 4, \src, \dst,
+ lb_sb \temp, 5, \src, \dst,
+ lb_sb \temp, 6, \src, \dst,
+ lb_sb \temp, 7, \src, \dst,
+.endm
+
+.macro sp_stack_prologue offset
+ addi sp, sp, -8
+ sub sp, sp, \offset
+.endm
+
+.macro sp_stack_epilogue offset
+ add sp, sp, \offset
+ addi sp, sp, 8
+.endm
diff --git a/tools/testing/selftests/riscv/misaligned/fpu.S b/tools/testing/selftests/riscv/misaligned/fpu.S
new file mode 100644
index 000000000000..d008bff58310
--- /dev/null
+++ b/tools/testing/selftests/riscv/misaligned/fpu.S
@@ -0,0 +1,180 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2025 Rivos Inc.
+ *
+ * Authors:
+ * Clément Léger <cleger(a)rivosinc.com>
+ */
+
+#include "common.S"
+
+#define CASE_ALIGN 4
+
+.macro fpu_load_inst fpreg, inst, precision, load_reg
+.align CASE_ALIGN
+ \inst \fpreg, 0(\load_reg)
+ fmv.\precision fa0, \fpreg
+ j 2f
+.endm
+
+#define flw(__fpreg) fpu_load_inst __fpreg, flw, s, s1
+#define fld(__fpreg) fpu_load_inst __fpreg, fld, d, s1
+#define c_flw(__fpreg) fpu_load_inst __fpreg, c.flw, s, s1
+#define c_fld(__fpreg) fpu_load_inst __fpreg, c.fld, d, s1
+#define c_fldsp(__fpreg) fpu_load_inst __fpreg, c.fldsp, d, sp
+
+.macro fpu_store_inst fpreg, inst, precision, store_reg
+.align CASE_ALIGN
+ fmv.\precision \fpreg, fa0
+ \inst \fpreg, 0(\store_reg)
+ j 2f
+.endm
+
+#define fsw(__fpreg) fpu_store_inst __fpreg, fsw, s, s1
+#define fsd(__fpreg) fpu_store_inst __fpreg, fsd, d, s1
+#define c_fsw(__fpreg) fpu_store_inst __fpreg, c.fsw, s, s1
+#define c_fsd(__fpreg) fpu_store_inst __fpreg, c.fsd, d, s1
+#define c_fsdsp(__fpreg) fpu_store_inst __fpreg, c.fsdsp, d, sp
+
+.macro fp_test_prologue
+ move s1, a1
+ /*
+ * Compute jump offset to store the correct FP register since we don't
+ * have indirect FP register access (or at least we don't use this
+ * extension so that works on all archs)
+ */
+ sll t0, a0, CASE_ALIGN
+ la t2, 1f
+ add t0, t0, t2
+ jr t0
+.align CASE_ALIGN
+1:
+.endm
+
+.macro fp_test_prologue_compressed
+ /* FP registers for compressed instructions starts from 8 to 16 */
+ addi a0, a0, -8
+ fp_test_prologue
+.endm
+
+#define fp_test_body_compressed(__inst_func) \
+ __inst_func(f8); \
+ __inst_func(f9); \
+ __inst_func(f10); \
+ __inst_func(f11); \
+ __inst_func(f12); \
+ __inst_func(f13); \
+ __inst_func(f14); \
+ __inst_func(f15); \
+2:
+
+#define fp_test_body(__inst_func) \
+ __inst_func(f0); \
+ __inst_func(f1); \
+ __inst_func(f2); \
+ __inst_func(f3); \
+ __inst_func(f4); \
+ __inst_func(f5); \
+ __inst_func(f6); \
+ __inst_func(f7); \
+ __inst_func(f8); \
+ __inst_func(f9); \
+ __inst_func(f10); \
+ __inst_func(f11); \
+ __inst_func(f12); \
+ __inst_func(f13); \
+ __inst_func(f14); \
+ __inst_func(f15); \
+ __inst_func(f16); \
+ __inst_func(f17); \
+ __inst_func(f18); \
+ __inst_func(f19); \
+ __inst_func(f20); \
+ __inst_func(f21); \
+ __inst_func(f22); \
+ __inst_func(f23); \
+ __inst_func(f24); \
+ __inst_func(f25); \
+ __inst_func(f26); \
+ __inst_func(f27); \
+ __inst_func(f28); \
+ __inst_func(f29); \
+ __inst_func(f30); \
+ __inst_func(f31); \
+2:
+.text
+
+#define __gen_test_inst(__inst, __suffix) \
+.global test_ ## __inst; \
+test_ ## __inst:; \
+ fp_test_prologue ## __suffix; \
+ fp_test_body ## __suffix(__inst); \
+ ret
+
+#define gen_test_inst_compressed(__inst) \
+ .option arch,+c; \
+ __gen_test_inst(c_ ## __inst, _compressed)
+
+#define gen_test_inst(__inst) \
+ .balign 16; \
+ .option push; \
+ .option arch,-c; \
+ __gen_test_inst(__inst, ); \
+ .option pop
+
+.macro fp_test_prologue_load_compressed_sp
+ copy_long_to t0, a1, sp
+.endm
+
+.macro fp_test_epilogue_load_compressed_sp
+.endm
+
+.macro fp_test_prologue_store_compressed_sp
+.endm
+
+.macro fp_test_epilogue_store_compressed_sp
+ copy_long_to t0, sp, a1
+.endm
+
+#define gen_inst_compressed_sp(__inst, __type) \
+ .global test_c_ ## __inst ## sp; \
+ test_c_ ## __inst ## sp:; \
+ sp_stack_prologue a2; \
+ fp_test_prologue_## __type ## _compressed_sp; \
+ fp_test_prologue_compressed; \
+ fp_test_body_compressed(c_ ## __inst ## sp); \
+ fp_test_epilogue_## __type ## _compressed_sp; \
+ sp_stack_epilogue a2; \
+ ret
+
+#define gen_test_load_compressed_sp(__inst) gen_inst_compressed_sp(__inst, load)
+#define gen_test_store_compressed_sp(__inst) gen_inst_compressed_sp(__inst, store)
+
+/*
+ * float_fsw_reg - Set a FP register from a register containing the value
+ * a0 = FP register index to be set
+ * a1 = addr where to store register value
+ * a2 = address offset
+ * a3 = value to be store
+ */
+gen_test_inst(fsw)
+
+/*
+ * float_flw_reg - Get a FP register value and return it
+ * a0 = FP register index to be retrieved
+ * a1 = addr to load register from
+ * a2 = address offset
+ */
+gen_test_inst(flw)
+
+gen_test_inst(fsd)
+#ifdef __riscv_compressed
+gen_test_inst_compressed(fsd)
+gen_test_store_compressed_sp(fsd)
+#endif
+
+gen_test_inst(fld)
+#ifdef __riscv_compressed
+gen_test_inst_compressed(fld)
+gen_test_load_compressed_sp(fld)
+#endif
diff --git a/tools/testing/selftests/riscv/misaligned/gp.S b/tools/testing/selftests/riscv/misaligned/gp.S
new file mode 100644
index 000000000000..f53f4c6d81dd
--- /dev/null
+++ b/tools/testing/selftests/riscv/misaligned/gp.S
@@ -0,0 +1,103 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2025 Rivos Inc.
+ *
+ * Authors:
+ * Clément Léger <cleger(a)rivosinc.com>
+ */
+
+#include "common.S"
+
+.text
+
+.macro __gen_test_inst inst, src_reg
+ \inst a2, 0(\src_reg)
+ move a0, a2
+.endm
+
+.macro gen_func_header func_name, rvc
+ .option arch,\rvc
+ .global test_\func_name
+ test_\func_name:
+.endm
+
+.macro gen_test_inst inst
+ .option push
+ gen_func_header \inst, -c
+ __gen_test_inst \inst, a0
+ .option pop
+ ret
+.endm
+
+.macro __gen_test_inst_c name, src_reg
+ .option push
+ gen_func_header c_\name, +c
+ __gen_test_inst c.\name, \src_reg
+ .option pop
+ ret
+.endm
+
+.macro gen_test_inst_c name
+ __gen_test_inst_c \name, a0
+.endm
+
+
+.macro gen_test_inst_load_c_sp name
+ .option push
+ gen_func_header c_\name\()sp, +c
+ sp_stack_prologue a1
+ copy_long_to t0, a0, sp
+ c.ldsp a0, 0(sp)
+ sp_stack_epilogue a1
+ .option pop
+ ret
+.endm
+
+.macro lb_sp_sb_a0 reg, offset
+ lb_sb \reg, \offset, sp, a0
+.endm
+
+.macro gen_test_inst_store_c_sp inst_name
+ .option push
+ gen_func_header c_\inst_name\()sp, +c
+ /* Misalign stack pointer */
+ sp_stack_prologue a1
+ /* Misalign access */
+ c.sdsp a2, 0(sp)
+ copy_long_to t0, sp, a0
+ sp_stack_epilogue a1
+ .option pop
+ ret
+.endm
+
+
+ /*
+ * a0 = addr to load from
+ * a1 = address offset
+ * a2 = value to be loaded
+ */
+gen_test_inst lh
+gen_test_inst lhu
+gen_test_inst lw
+gen_test_inst lwu
+gen_test_inst ld
+#ifdef __riscv_compressed
+gen_test_inst_c lw
+gen_test_inst_c ld
+gen_test_inst_load_c_sp ld
+#endif
+
+/*
+ * a0 = addr where to store value
+ * a1 = address offset
+ * a2 = value to be stored
+ */
+gen_test_inst sh
+gen_test_inst sw
+gen_test_inst sd
+#ifdef __riscv_compressed
+gen_test_inst_c sw
+gen_test_inst_c sd
+gen_test_inst_store_c_sp sd
+#endif
+
diff --git a/tools/testing/selftests/riscv/misaligned/misaligned.c b/tools/testing/selftests/riscv/misaligned/misaligned.c
new file mode 100644
index 000000000000..11def5f67dd9
--- /dev/null
+++ b/tools/testing/selftests/riscv/misaligned/misaligned.c
@@ -0,0 +1,254 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2025 Rivos Inc.
+ *
+ * Authors:
+ * Clément Léger <cleger(a)rivosinc.com>
+ */
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <linux/ptrace.h>
+#include "../../kselftest_harness.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <float.h>
+#include <errno.h>
+#include <math.h>
+#include <string.h>
+#include <signal.h>
+#include <stdbool.h>
+#include <unistd.h>
+#include <inttypes.h>
+#include <ucontext.h>
+
+#include <sys/prctl.h>
+
+#define stringify(s) __stringify(s)
+#define __stringify(s) #s
+
+#define VAL16 0x1234
+#define VAL32 0xDEADBEEF
+#define VAL64 0x45674321D00DF789
+
+#define VAL_float 78951.234375
+#define VAL_double 567890.512396965789589290
+
+static bool float_equal(float a, float b)
+{
+ float scaled_epsilon;
+ float difference = fabsf(a - b);
+
+ // Scale to the largest value.
+ a = fabsf(a);
+ b = fabsf(b);
+ if (a > b)
+ scaled_epsilon = FLT_EPSILON * a;
+ else
+ scaled_epsilon = FLT_EPSILON * b;
+
+ return difference <= scaled_epsilon;
+}
+
+static bool double_equal(double a, double b)
+{
+ double scaled_epsilon;
+ double difference = fabsf(a - b);
+
+ // Scale to the largest value.
+ a = fabs(a);
+ b = fabs(b);
+ if (a > b)
+ scaled_epsilon = DBL_EPSILON * a;
+ else
+ scaled_epsilon = DBL_EPSILON * b;
+
+ return difference <= scaled_epsilon;
+}
+
+#define fpu_load_proto(__inst, __type) \
+extern __type test_ ## __inst(unsigned long fp_reg, void *addr, unsigned long offset, __type value)
+
+fpu_load_proto(flw, float);
+fpu_load_proto(fld, double);
+fpu_load_proto(c_flw, float);
+fpu_load_proto(c_fld, double);
+fpu_load_proto(c_fldsp, double);
+
+#define fpu_store_proto(__inst, __type) \
+extern void test_ ## __inst(unsigned long fp_reg, void *addr, unsigned long offset, __type value)
+
+fpu_store_proto(fsw, float);
+fpu_store_proto(fsd, double);
+fpu_store_proto(c_fsw, float);
+fpu_store_proto(c_fsd, double);
+fpu_store_proto(c_fsdsp, double);
+
+#define gp_load_proto(__inst, __type) \
+extern __type test_ ## __inst(void *addr, unsigned long offset, __type value)
+
+gp_load_proto(lh, uint16_t);
+gp_load_proto(lhu, uint16_t);
+gp_load_proto(lw, uint32_t);
+gp_load_proto(lwu, uint32_t);
+gp_load_proto(ld, uint64_t);
+gp_load_proto(c_lw, uint32_t);
+gp_load_proto(c_ld, uint64_t);
+gp_load_proto(c_ldsp, uint64_t);
+
+#define gp_store_proto(__inst, __type) \
+extern void test_ ## __inst(void *addr, unsigned long offset, __type value)
+
+gp_store_proto(sh, uint16_t);
+gp_store_proto(sw, uint32_t);
+gp_store_proto(sd, uint64_t);
+gp_store_proto(c_sw, uint32_t);
+gp_store_proto(c_sd, uint64_t);
+gp_store_proto(c_sdsp, uint64_t);
+
+#define TEST_GP_LOAD(__inst, __type_size) \
+TEST(gp_load_ ## __inst) \
+{ \
+ int offset, ret; \
+ uint8_t buf[16] __attribute__((aligned(16))); \
+ \
+ ret = prctl(PR_SET_UNALIGN, PR_UNALIGN_NOPRINT); \
+ ASSERT_EQ(ret, 0); \
+ \
+ for (offset = 1; offset < (__type_size) / 8; offset++) { \
+ uint ## __type_size ## _t val = VAL ## __type_size; \
+ uint ## __type_size ## _t *ptr = (uint ## __type_size ## _t *)(buf + offset); \
+ memcpy(ptr, &val, sizeof(val)); \
+ val = test_ ## __inst(ptr, offset, val); \
+ EXPECT_EQ(VAL ## __type_size, val); \
+ } \
+}
+
+TEST_GP_LOAD(lh, 16);
+TEST_GP_LOAD(lhu, 16);
+TEST_GP_LOAD(lw, 32);
+TEST_GP_LOAD(lwu, 32);
+TEST_GP_LOAD(ld, 64);
+#ifdef __riscv_compressed
+TEST_GP_LOAD(c_lw, 32);
+TEST_GP_LOAD(c_ld, 64);
+TEST_GP_LOAD(c_ldsp, 64);
+#endif
+
+#define TEST_GP_STORE(__inst, __type_size) \
+TEST(gp_load_ ## __inst) \
+{ \
+ int offset, ret; \
+ uint8_t buf[16] __attribute__((aligned(16))); \
+ \
+ ret = prctl(PR_SET_UNALIGN, PR_UNALIGN_NOPRINT); \
+ ASSERT_EQ(ret, 0); \
+ \
+ for (offset = 1; offset < (__type_size) / 8; offset++) { \
+ uint ## __type_size ## _t val = VAL ## __type_size; \
+ uint ## __type_size ## _t *ptr = (uint ## __type_size ## _t *)(buf + offset); \
+ memset(ptr, 0, sizeof(val)); \
+ test_ ## __inst(ptr, offset, val); \
+ memcpy(&val, ptr, sizeof(val)); \
+ EXPECT_EQ(VAL ## __type_size, val); \
+ } \
+}
+TEST_GP_STORE(sh, 16);
+TEST_GP_STORE(sw, 32);
+TEST_GP_STORE(sd, 64);
+#ifdef __riscv_compressed
+TEST_GP_STORE(c_sw, 32);
+TEST_GP_STORE(c_sd, 64);
+TEST_GP_STORE(c_sdsp, 64);
+#endif
+
+#define __TEST_FPU_LOAD(__type, __inst, __reg_start, __reg_end) \
+TEST(fpu_load_ ## __inst) \
+{ \
+ int ret, offset, fp_reg; \
+ uint8_t buf[16] __attribute__((aligned(16))); \
+ \
+ ret = prctl(PR_SET_UNALIGN, PR_UNALIGN_NOPRINT); \
+ ASSERT_EQ(ret, 0); \
+ \
+ for (fp_reg = __reg_start; fp_reg < __reg_end; fp_reg++) { \
+ for (offset = 1; offset < 4; offset++) { \
+ void *load_addr = (buf + offset); \
+ __type val = VAL_ ## __type ; \
+ \
+ memcpy(load_addr, &val, sizeof(val)); \
+ val = test_ ## __inst(fp_reg, load_addr, offset, val); \
+ EXPECT_TRUE(__type ##_equal(val, VAL_## __type)); \
+ } \
+ } \
+}
+#define TEST_FPU_LOAD(__type, __inst) \
+ __TEST_FPU_LOAD(__type, __inst, 0, 32)
+#define TEST_FPU_LOAD_COMPRESSED(__type, __inst) \
+ __TEST_FPU_LOAD(__type, __inst, 8, 16)
+
+TEST_FPU_LOAD(float, flw)
+TEST_FPU_LOAD(double, fld)
+#ifdef __riscv_compressed
+TEST_FPU_LOAD_COMPRESSED(double, c_fld)
+TEST_FPU_LOAD_COMPRESSED(double, c_fldsp)
+#endif
+
+#define __TEST_FPU_STORE(__type, __inst, __reg_start, __reg_end) \
+TEST(fpu_store_ ## __inst) \
+{ \
+ int ret, offset, fp_reg; \
+ uint8_t buf[16] __attribute__((aligned(16))); \
+ \
+ ret = prctl(PR_SET_UNALIGN, PR_UNALIGN_NOPRINT); \
+ ASSERT_EQ(ret, 0); \
+ \
+ for (fp_reg = __reg_start; fp_reg < __reg_end; fp_reg++) { \
+ for (offset = 1; offset < 4; offset++) { \
+ \
+ void *store_addr = (buf + offset); \
+ __type val = VAL_ ## __type ; \
+ \
+ test_ ## __inst(fp_reg, store_addr, offset, val); \
+ memcpy(&val, store_addr, sizeof(val)); \
+ EXPECT_TRUE(__type ## _equal(val, VAL_## __type)); \
+ } \
+ } \
+}
+#define TEST_FPU_STORE(__type, __inst) \
+ __TEST_FPU_STORE(__type, __inst, 0, 32)
+#define TEST_FPU_STORE_COMPRESSED(__type, __inst) \
+ __TEST_FPU_STORE(__type, __inst, 8, 16)
+
+TEST_FPU_STORE(float, fsw)
+TEST_FPU_STORE(double, fsd)
+#ifdef __riscv_compressed
+TEST_FPU_STORE_COMPRESSED(double, c_fsd)
+TEST_FPU_STORE_COMPRESSED(double, c_fsdsp)
+#endif
+
+TEST_SIGNAL(gen_sigbus, SIGBUS)
+{
+ uint32_t *ptr;
+ uint8_t buf[16] __attribute__((aligned(16)));
+ int ret;
+
+ ret = prctl(PR_SET_UNALIGN, PR_UNALIGN_SIGBUS);
+ ASSERT_EQ(ret, 0);
+
+ ptr = (uint32_t *)(buf + 1);
+ *ptr = 0xDEADBEEFULL;
+}
+
+int main(int argc, char **argv)
+{
+ int ret, val;
+
+ ret = prctl(PR_GET_UNALIGN, &val);
+ if (ret == -1 && errno == EINVAL)
+ ksft_exit_skip("SKIP GET_UNALIGN_CTL not supported\n");
+
+ exit(test_harness_run(argc, argv));
+}
--
2.49.0
5 months, 1 week
- 1
- 0
[PATCH] selftests: riscv: add misaligned access testing
by Clément Léger
This selftest tests all the currently emulated instruction (except for
the RV32 compressed ones which are left as a future exercise for a RV32
user). For the FPU instructions, all the FPU registers are tested.
This commit can be tested using
Signed-off-by: Clément Léger <cleger(a)rivosinc.com>
---
Note: this test can be executed with the FWFT series [1] or using an SBI
firmware that delegates misaligned traps by default. If using QEMU,
you will need the patches mentionned at [2] so that misaligned accesses
will generate a trap.
Link: https://lore.kernel.org/all/20250424173204.1948385-1-cleger@rivosinc.com/ [1]
Link: https://lore.kernel.org/all/20241211211933.198792-1-fkonrad@amd.com/ [2]
tools/testing/selftests/riscv/Makefile | 2 +-
.../selftests/riscv/misaligned/.gitignore | 1 +
.../selftests/riscv/misaligned/Makefile | 12 +
.../selftests/riscv/misaligned/common.S | 33 +++
.../testing/selftests/riscv/misaligned/fpu.S | 180 +++++++++++++
tools/testing/selftests/riscv/misaligned/gp.S | 103 +++++++
.../selftests/riscv/misaligned/misaligned.c | 254 ++++++++++++++++++
7 files changed, 584 insertions(+), 1 deletion(-)
create mode 100644 tools/testing/selftests/riscv/misaligned/.gitignore
create mode 100644 tools/testing/selftests/riscv/misaligned/Makefile
create mode 100644 tools/testing/selftests/riscv/misaligned/common.S
create mode 100644 tools/testing/selftests/riscv/misaligned/fpu.S
create mode 100644 tools/testing/selftests/riscv/misaligned/gp.S
create mode 100644 tools/testing/selftests/riscv/misaligned/misaligned.c
diff --git a/tools/testing/selftests/riscv/Makefile b/tools/testing/selftests/riscv/Makefile
index 099b8c1f46f8..95a98ceeb3b3 100644
--- a/tools/testing/selftests/riscv/Makefile
+++ b/tools/testing/selftests/riscv/Makefile
@@ -5,7 +5,7 @@
ARCH ?= $(shell uname -m 2>/dev/null || echo not)
ifneq (,$(filter $(ARCH),riscv))
-RISCV_SUBTARGETS ?= abi hwprobe mm sigreturn vector
+RISCV_SUBTARGETS ?= abi hwprobe mm sigreturn vector misaligned
else
RISCV_SUBTARGETS :=
endif
diff --git a/tools/testing/selftests/riscv/misaligned/.gitignore b/tools/testing/selftests/riscv/misaligned/.gitignore
new file mode 100644
index 000000000000..5eff15a1f981
--- /dev/null
+++ b/tools/testing/selftests/riscv/misaligned/.gitignore
@@ -0,0 +1 @@
+misaligned
diff --git a/tools/testing/selftests/riscv/misaligned/Makefile b/tools/testing/selftests/riscv/misaligned/Makefile
new file mode 100644
index 000000000000..1aa40110c50d
--- /dev/null
+++ b/tools/testing/selftests/riscv/misaligned/Makefile
@@ -0,0 +1,12 @@
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (C) 2021 ARM Limited
+# Originally tools/testing/arm64/abi/Makefile
+
+CFLAGS += -I$(top_srcdir)/tools/include
+
+TEST_GEN_PROGS := misaligned
+
+include ../../lib.mk
+
+$(OUTPUT)/misaligned: misaligned.c fpu.S gp.S
+ $(CC) -g3 -static -o$@ -march=rv64imafdc $(CFLAGS) $(LDFLAGS) $^
diff --git a/tools/testing/selftests/riscv/misaligned/common.S b/tools/testing/selftests/riscv/misaligned/common.S
new file mode 100644
index 000000000000..8fa00035bd5d
--- /dev/null
+++ b/tools/testing/selftests/riscv/misaligned/common.S
@@ -0,0 +1,33 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2025 Rivos Inc.
+ *
+ * Authors:
+ * Clément Léger <cleger(a)rivosinc.com>
+ */
+
+.macro lb_sb temp, offset, src, dst
+ lb \temp, \offset(\src)
+ sb \temp, \offset(\dst)
+.endm
+
+.macro copy_long_to temp, src, dst
+ lb_sb \temp, 0, \src, \dst,
+ lb_sb \temp, 1, \src, \dst,
+ lb_sb \temp, 2, \src, \dst,
+ lb_sb \temp, 3, \src, \dst,
+ lb_sb \temp, 4, \src, \dst,
+ lb_sb \temp, 5, \src, \dst,
+ lb_sb \temp, 6, \src, \dst,
+ lb_sb \temp, 7, \src, \dst,
+.endm
+
+.macro sp_stack_prologue offset
+ addi sp, sp, -8
+ sub sp, sp, \offset
+.endm
+
+.macro sp_stack_epilogue offset
+ add sp, sp, \offset
+ addi sp, sp, 8
+.endm
diff --git a/tools/testing/selftests/riscv/misaligned/fpu.S b/tools/testing/selftests/riscv/misaligned/fpu.S
new file mode 100644
index 000000000000..d008bff58310
--- /dev/null
+++ b/tools/testing/selftests/riscv/misaligned/fpu.S
@@ -0,0 +1,180 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2025 Rivos Inc.
+ *
+ * Authors:
+ * Clément Léger <cleger(a)rivosinc.com>
+ */
+
+#include "common.S"
+
+#define CASE_ALIGN 4
+
+.macro fpu_load_inst fpreg, inst, precision, load_reg
+.align CASE_ALIGN
+ \inst \fpreg, 0(\load_reg)
+ fmv.\precision fa0, \fpreg
+ j 2f
+.endm
+
+#define flw(__fpreg) fpu_load_inst __fpreg, flw, s, s1
+#define fld(__fpreg) fpu_load_inst __fpreg, fld, d, s1
+#define c_flw(__fpreg) fpu_load_inst __fpreg, c.flw, s, s1
+#define c_fld(__fpreg) fpu_load_inst __fpreg, c.fld, d, s1
+#define c_fldsp(__fpreg) fpu_load_inst __fpreg, c.fldsp, d, sp
+
+.macro fpu_store_inst fpreg, inst, precision, store_reg
+.align CASE_ALIGN
+ fmv.\precision \fpreg, fa0
+ \inst \fpreg, 0(\store_reg)
+ j 2f
+.endm
+
+#define fsw(__fpreg) fpu_store_inst __fpreg, fsw, s, s1
+#define fsd(__fpreg) fpu_store_inst __fpreg, fsd, d, s1
+#define c_fsw(__fpreg) fpu_store_inst __fpreg, c.fsw, s, s1
+#define c_fsd(__fpreg) fpu_store_inst __fpreg, c.fsd, d, s1
+#define c_fsdsp(__fpreg) fpu_store_inst __fpreg, c.fsdsp, d, sp
+
+.macro fp_test_prologue
+ move s1, a1
+ /*
+ * Compute jump offset to store the correct FP register since we don't
+ * have indirect FP register access (or at least we don't use this
+ * extension so that works on all archs)
+ */
+ sll t0, a0, CASE_ALIGN
+ la t2, 1f
+ add t0, t0, t2
+ jr t0
+.align CASE_ALIGN
+1:
+.endm
+
+.macro fp_test_prologue_compressed
+ /* FP registers for compressed instructions starts from 8 to 16 */
+ addi a0, a0, -8
+ fp_test_prologue
+.endm
+
+#define fp_test_body_compressed(__inst_func) \
+ __inst_func(f8); \
+ __inst_func(f9); \
+ __inst_func(f10); \
+ __inst_func(f11); \
+ __inst_func(f12); \
+ __inst_func(f13); \
+ __inst_func(f14); \
+ __inst_func(f15); \
+2:
+
+#define fp_test_body(__inst_func) \
+ __inst_func(f0); \
+ __inst_func(f1); \
+ __inst_func(f2); \
+ __inst_func(f3); \
+ __inst_func(f4); \
+ __inst_func(f5); \
+ __inst_func(f6); \
+ __inst_func(f7); \
+ __inst_func(f8); \
+ __inst_func(f9); \
+ __inst_func(f10); \
+ __inst_func(f11); \
+ __inst_func(f12); \
+ __inst_func(f13); \
+ __inst_func(f14); \
+ __inst_func(f15); \
+ __inst_func(f16); \
+ __inst_func(f17); \
+ __inst_func(f18); \
+ __inst_func(f19); \
+ __inst_func(f20); \
+ __inst_func(f21); \
+ __inst_func(f22); \
+ __inst_func(f23); \
+ __inst_func(f24); \
+ __inst_func(f25); \
+ __inst_func(f26); \
+ __inst_func(f27); \
+ __inst_func(f28); \
+ __inst_func(f29); \
+ __inst_func(f30); \
+ __inst_func(f31); \
+2:
+.text
+
+#define __gen_test_inst(__inst, __suffix) \
+.global test_ ## __inst; \
+test_ ## __inst:; \
+ fp_test_prologue ## __suffix; \
+ fp_test_body ## __suffix(__inst); \
+ ret
+
+#define gen_test_inst_compressed(__inst) \
+ .option arch,+c; \
+ __gen_test_inst(c_ ## __inst, _compressed)
+
+#define gen_test_inst(__inst) \
+ .balign 16; \
+ .option push; \
+ .option arch,-c; \
+ __gen_test_inst(__inst, ); \
+ .option pop
+
+.macro fp_test_prologue_load_compressed_sp
+ copy_long_to t0, a1, sp
+.endm
+
+.macro fp_test_epilogue_load_compressed_sp
+.endm
+
+.macro fp_test_prologue_store_compressed_sp
+.endm
+
+.macro fp_test_epilogue_store_compressed_sp
+ copy_long_to t0, sp, a1
+.endm
+
+#define gen_inst_compressed_sp(__inst, __type) \
+ .global test_c_ ## __inst ## sp; \
+ test_c_ ## __inst ## sp:; \
+ sp_stack_prologue a2; \
+ fp_test_prologue_## __type ## _compressed_sp; \
+ fp_test_prologue_compressed; \
+ fp_test_body_compressed(c_ ## __inst ## sp); \
+ fp_test_epilogue_## __type ## _compressed_sp; \
+ sp_stack_epilogue a2; \
+ ret
+
+#define gen_test_load_compressed_sp(__inst) gen_inst_compressed_sp(__inst, load)
+#define gen_test_store_compressed_sp(__inst) gen_inst_compressed_sp(__inst, store)
+
+/*
+ * float_fsw_reg - Set a FP register from a register containing the value
+ * a0 = FP register index to be set
+ * a1 = addr where to store register value
+ * a2 = address offset
+ * a3 = value to be store
+ */
+gen_test_inst(fsw)
+
+/*
+ * float_flw_reg - Get a FP register value and return it
+ * a0 = FP register index to be retrieved
+ * a1 = addr to load register from
+ * a2 = address offset
+ */
+gen_test_inst(flw)
+
+gen_test_inst(fsd)
+#ifdef __riscv_compressed
+gen_test_inst_compressed(fsd)
+gen_test_store_compressed_sp(fsd)
+#endif
+
+gen_test_inst(fld)
+#ifdef __riscv_compressed
+gen_test_inst_compressed(fld)
+gen_test_load_compressed_sp(fld)
+#endif
diff --git a/tools/testing/selftests/riscv/misaligned/gp.S b/tools/testing/selftests/riscv/misaligned/gp.S
new file mode 100644
index 000000000000..f53f4c6d81dd
--- /dev/null
+++ b/tools/testing/selftests/riscv/misaligned/gp.S
@@ -0,0 +1,103 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2025 Rivos Inc.
+ *
+ * Authors:
+ * Clément Léger <cleger(a)rivosinc.com>
+ */
+
+#include "common.S"
+
+.text
+
+.macro __gen_test_inst inst, src_reg
+ \inst a2, 0(\src_reg)
+ move a0, a2
+.endm
+
+.macro gen_func_header func_name, rvc
+ .option arch,\rvc
+ .global test_\func_name
+ test_\func_name:
+.endm
+
+.macro gen_test_inst inst
+ .option push
+ gen_func_header \inst, -c
+ __gen_test_inst \inst, a0
+ .option pop
+ ret
+.endm
+
+.macro __gen_test_inst_c name, src_reg
+ .option push
+ gen_func_header c_\name, +c
+ __gen_test_inst c.\name, \src_reg
+ .option pop
+ ret
+.endm
+
+.macro gen_test_inst_c name
+ __gen_test_inst_c \name, a0
+.endm
+
+
+.macro gen_test_inst_load_c_sp name
+ .option push
+ gen_func_header c_\name\()sp, +c
+ sp_stack_prologue a1
+ copy_long_to t0, a0, sp
+ c.ldsp a0, 0(sp)
+ sp_stack_epilogue a1
+ .option pop
+ ret
+.endm
+
+.macro lb_sp_sb_a0 reg, offset
+ lb_sb \reg, \offset, sp, a0
+.endm
+
+.macro gen_test_inst_store_c_sp inst_name
+ .option push
+ gen_func_header c_\inst_name\()sp, +c
+ /* Misalign stack pointer */
+ sp_stack_prologue a1
+ /* Misalign access */
+ c.sdsp a2, 0(sp)
+ copy_long_to t0, sp, a0
+ sp_stack_epilogue a1
+ .option pop
+ ret
+.endm
+
+
+ /*
+ * a0 = addr to load from
+ * a1 = address offset
+ * a2 = value to be loaded
+ */
+gen_test_inst lh
+gen_test_inst lhu
+gen_test_inst lw
+gen_test_inst lwu
+gen_test_inst ld
+#ifdef __riscv_compressed
+gen_test_inst_c lw
+gen_test_inst_c ld
+gen_test_inst_load_c_sp ld
+#endif
+
+/*
+ * a0 = addr where to store value
+ * a1 = address offset
+ * a2 = value to be stored
+ */
+gen_test_inst sh
+gen_test_inst sw
+gen_test_inst sd
+#ifdef __riscv_compressed
+gen_test_inst_c sw
+gen_test_inst_c sd
+gen_test_inst_store_c_sp sd
+#endif
+
diff --git a/tools/testing/selftests/riscv/misaligned/misaligned.c b/tools/testing/selftests/riscv/misaligned/misaligned.c
new file mode 100644
index 000000000000..8fa5ad1a93d1
--- /dev/null
+++ b/tools/testing/selftests/riscv/misaligned/misaligned.c
@@ -0,0 +1,254 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2025 Rivos Inc.
+ *
+ * Authors:
+ * Clément Léger <cleger(a)rivosinc.com>
+ */
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <linux/ptrace.h>
+#include "../../kselftest_harness.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <float.h>
+#include <errno.h>
+#include <math.h>
+#include <string.h>
+#include <signal.h>
+#include <stdbool.h>
+#include <unistd.h>
+#include <inttypes.h>
+#include <ucontext.h>
+
+#include <sys/prctl.h>
+
+#define stringify(s) __stringify(s)
+#define __stringify(s) #s
+
+#define VAL16 0x1234
+#define VAL32 0xDEADBEEF
+#define VAL64 0x45674321D00DF789
+
+#define VAL_float 78951.234375
+#define VAL_double 567890.512396965789589290
+
+static bool float_equal(float a, float b)
+{
+ float scaled_epsilon;
+ float difference = fabsf(a - b);
+
+ // Scale to the largest value.
+ a = fabsf(a);
+ b = fabsf(b);
+ if (a > b)
+ scaled_epsilon = FLT_EPSILON * a;
+ else
+ scaled_epsilon = FLT_EPSILON * b;
+
+ return difference <= scaled_epsilon;
+}
+
+static bool double_equal(double a, double b)
+{
+ double scaled_epsilon;
+ double difference = fabsf(a - b);
+
+ // Scale to the largest value.
+ a = fabs(a);
+ b = fabs(b);
+ if (a > b)
+ scaled_epsilon = DBL_EPSILON * a;
+ else
+ scaled_epsilon = DBL_EPSILON * b;
+
+ return difference <= scaled_epsilon;
+}
+
+#define fpu_load_proto(__inst, __type) \
+extern __type test_ ## __inst(unsigned long fp_reg, void *addr, unsigned long offset, __type value)
+
+fpu_load_proto(flw, float);
+fpu_load_proto(fld, double);
+fpu_load_proto(c_flw, float);
+fpu_load_proto(c_fld, double);
+fpu_load_proto(c_fldsp, double);
+
+#define fpu_store_proto(__inst, __type) \
+extern void test_ ## __inst(unsigned long fp_reg, void *addr, unsigned long offset, __type value)
+
+fpu_store_proto(fsw, float);
+fpu_store_proto(fsd, double);
+fpu_store_proto(c_fsw, float);
+fpu_store_proto(c_fsd, double);
+fpu_store_proto(c_fsdsp, double);
+
+#define gp_load_proto(__inst, __type) \
+extern __type test_ ## __inst(void *addr, unsigned long offset, __type value)
+
+gp_load_proto(lh, uint16_t);
+gp_load_proto(lhu, uint16_t);
+gp_load_proto(lw, uint32_t);
+gp_load_proto(lwu, uint32_t);
+gp_load_proto(ld, uint64_t);
+gp_load_proto(c_lw, uint32_t);
+gp_load_proto(c_ld, uint64_t);
+gp_load_proto(c_ldsp, uint64_t);
+
+#define gp_store_proto(__inst, __type) \
+extern void test_ ## __inst(void *addr, unsigned long offset, __type value)
+
+gp_store_proto(sh, uint16_t);
+gp_store_proto(sw, uint32_t);
+gp_store_proto(sd, uint64_t);
+gp_store_proto(c_sw, uint32_t);
+gp_store_proto(c_sd, uint64_t);
+gp_store_proto(c_sdsp, uint64_t);
+
+#define TEST_GP_LOAD(__inst, __type_size) \
+TEST(gp_load_ ## __inst) \
+{ \
+ int offset, ret; \
+ uint8_t buf[16] __attribute__((aligned(16))); \
+ \
+ ret = prctl(PR_SET_UNALIGN, PR_UNALIGN_NOPRINT); \
+ ASSERT_EQ(ret, 0); \
+ \
+ for (offset = 1; offset < __type_size / 8; offset++) { \
+ uint ## __type_size ## _t val = VAL ## __type_size; \
+ uint ## __type_size ## _t *ptr = (uint ## __type_size ## _t *) (buf + offset); \
+ memcpy(ptr, &val, sizeof(val)); \
+ val = test_ ## __inst(ptr, offset, val); \
+ EXPECT_EQ(VAL ## __type_size, val); \
+ } \
+}
+
+TEST_GP_LOAD(lh, 16);
+TEST_GP_LOAD(lhu, 16);
+TEST_GP_LOAD(lw, 32);
+TEST_GP_LOAD(lwu, 32);
+TEST_GP_LOAD(ld, 64);
+#ifdef __riscv_compressed
+TEST_GP_LOAD(c_lw, 32);
+TEST_GP_LOAD(c_ld, 64);
+TEST_GP_LOAD(c_ldsp, 64);
+#endif
+
+#define TEST_GP_STORE(__inst, __type_size) \
+TEST(gp_load_ ## __inst) \
+{ \
+ int offset, ret; \
+ uint8_t buf[16] __attribute__((aligned(16))); \
+ \
+ ret = prctl(PR_SET_UNALIGN, PR_UNALIGN_NOPRINT); \
+ ASSERT_EQ(ret, 0); \
+ \
+ for (offset = 1; offset < __type_size / 8; offset++) { \
+ uint ## __type_size ## _t val = VAL ## __type_size; \
+ uint ## __type_size ## _t *ptr = (uint ## __type_size ## _t *) (buf + offset); \
+ memset(ptr, 0, sizeof(val)); \
+ test_ ## __inst(ptr, offset, val); \
+ memcpy(&val, ptr, sizeof(val)); \
+ EXPECT_EQ(VAL ## __type_size, val); \
+ } \
+}
+TEST_GP_STORE(sh, 16);
+TEST_GP_STORE(sw, 32);
+TEST_GP_STORE(sd, 64);
+#ifdef __riscv_compressed
+TEST_GP_STORE(c_sw, 32);
+TEST_GP_STORE(c_sd, 64);
+TEST_GP_STORE(c_sdsp, 64);
+#endif
+
+#define __TEST_FPU_LOAD(__type, __inst, __reg_start, __reg_end) \
+TEST(fpu_load_ ## __inst) \
+{ \
+ int ret, offset, fp_reg; \
+ uint8_t buf[16] __attribute__((aligned(16))); \
+ \
+ ret = prctl(PR_SET_UNALIGN, PR_UNALIGN_NOPRINT); \
+ ASSERT_EQ(ret, 0); \
+ \
+ for (fp_reg = __reg_start; fp_reg < __reg_end; fp_reg++) { \
+ for (offset = 1; offset < 4; offset++) { \
+ void *load_addr = (buf + offset); \
+ __type val = VAL_ ## __type ; \
+ \
+ memcpy(load_addr, &val, sizeof(val)); \
+ val = test_ ## __inst(fp_reg, load_addr, offset, val); \
+ EXPECT_TRUE(__type ##_equal(val, VAL_## __type)); \
+ } \
+ } \
+}
+#define TEST_FPU_LOAD(__type, __inst) \
+ __TEST_FPU_LOAD(__type, __inst, 0, 32)
+#define TEST_FPU_LOAD_COMPRESSED(__type, __inst) \
+ __TEST_FPU_LOAD(__type, __inst, 8, 16)
+
+TEST_FPU_LOAD(float, flw)
+TEST_FPU_LOAD(double, fld)
+#ifdef __riscv_compressed
+TEST_FPU_LOAD_COMPRESSED(double, c_fld)
+TEST_FPU_LOAD_COMPRESSED(double, c_fldsp)
+#endif
+
+#define __TEST_FPU_STORE(__type, __inst, __reg_start, __reg_end) \
+TEST(fpu_store_ ## __inst) \
+{ \
+ int ret, offset, fp_reg; \
+ uint8_t buf[16] __attribute__((aligned(16))); \
+ \
+ ret = prctl(PR_SET_UNALIGN, PR_UNALIGN_NOPRINT); \
+ ASSERT_EQ(ret, 0); \
+ \
+ for (fp_reg = __reg_start; fp_reg < __reg_end; fp_reg++) { \
+ for (offset = 1; offset < 4; offset++) { \
+ \
+ void *store_addr = (buf + offset); \
+ __type val = VAL_ ## __type ; \
+ \
+ test_ ## __inst(fp_reg, store_addr, offset, val); \
+ memcpy(&val, store_addr, sizeof(val)); \
+ EXPECT_TRUE(__type ## _equal(val, VAL_## __type)); \
+ } \
+ } \
+}
+#define TEST_FPU_STORE(__type, __inst) \
+ __TEST_FPU_STORE(__type, __inst, 0, 32)
+#define TEST_FPU_STORE_COMPRESSED(__type, __inst) \
+ __TEST_FPU_STORE(__type, __inst, 8, 16)
+
+TEST_FPU_STORE(float, fsw)
+TEST_FPU_STORE(double, fsd)
+#ifdef __riscv_compressed
+TEST_FPU_STORE_COMPRESSED(double, c_fsd)
+TEST_FPU_STORE_COMPRESSED(double, c_fsdsp)
+#endif
+
+TEST_SIGNAL(gen_sigbus, SIGBUS)
+{
+ uint32_t *ptr;
+ uint8_t buf[16] __attribute__((aligned(16)));
+ int ret;
+
+ ret = prctl(PR_SET_UNALIGN, PR_UNALIGN_SIGBUS);
+ ASSERT_EQ(ret, 0);
+
+ ptr = (uint32_t *)(buf + 1);
+ *ptr = 0xDEADBEEFULL;
+}
+
+int main(int argc, char **argv)
+{
+ int ret, val;
+
+ ret = prctl(PR_GET_UNALIGN, &val);
+ if (ret == -1 && errno == EINVAL)
+ ksft_exit_skip("SKIP GET_UNALIGN_CTL not supported\n");
+
+ exit(test_harness_run(argc, argv));
+}
--
2.49.0
5 months, 1 week
- 2
- 2
[PATCH net-next v4] selftests/vsock: add initial vmtest.sh for vsock
by Bobby Eshleman
This commit introduces a new vmtest.sh runner for vsock.
It uses virtme-ng/qemu to run tests in a VM. The tests validate G2H,
H2G, and loopback. The testing tools from tools/testing/vsock/ are
reused. Currently, only vsock_test is used.
VMCI and hyperv support is automatically built, though not used.
Only tested on x86.
To run:
$ tools/testing/selftests/vsock/vmtest.sh
or
$ make -C tools/testing/selftests TARGETS=vsock run_tests
Output (vmtest.sh):
TAP version 13
1..3
not ok 1 vm_server_host_client # exit=1
ok 1 vm_client_host_server
ok 2 vm_loopback
SUMMARY: PASS=2 SKIP=0 FAIL=1
1..3
Future work can include vsock_diag_test.
The tap output style copies mm's run_vmtests.sh.
Because vsock requires a VM to test anything other than loopback, this
patch adds vmtest.sh as a kselftest itself. This is different than other
systems that have a "vmtest.sh", where it is used as a utility script to
spin up a VM to run the selftests as a guest (but isn't hooked into
kselftest).
I've began testing this in one of the NIPA environments Jakub as
graciously provided. I would expect at least one more revision to have
that setup ironed out and fully tested.
Signed-off-by: Bobby Eshleman <bobbyeshleman(a)gmail.com>
---
Changes in v4:
- do not use special tab delimiter for help string parsing (Stefano + Paolo)
- fix paths for when installing kselftest and running out-of-tree (Paolo)
- change vng to using running kernel instead of compiled kernel (Paolo)
- use multi-line string for QEMU_OPTS (Stefano)
- change timeout to 300s (Paolo)
- skip if tools are not found and use kselftests status codes (Paolo)
- remove build from vmtest.sh (Paolo)
- change 2222 -> SSH_HOST_PORT (Stefano)
- add tap-format output
- add vmtest.log to gitignore
- check for vsock_test binary and remind user to build it if missing
- create a proper build in makefile
- style fixes
- add ssh, timeout, and pkill to dependency check, just in case
- fix numerical comparison in conditionals
- check qemu pidfile exists before proceeding (avoid wasting time waiting for ssh)
- fix tracking of pass/fail bug
- fix stderr redirection bug
- Link to v3: https://lore.kernel.org/r/20250428-vsock-vmtest-v3-1-181af6163f3e@gmail.com
Changes in v3:
- use common conditional syntax for checking variables
- use return value instead of global rc
- fix typo TEST_HOST_LISTENER_PORT -> TEST_HOST_PORT_LISTENER
- use SIGTERM instead of SIGKILL on cleanup
- use peer-cid=1 for loopback
- change sleep delay times into globals
- fix test_vm_loopback logging
- add test selection in arguments
- make QEMU an argument
- check that vng binary is on path
- use QEMU variable
- change <tab><backslash> to <space><backslash>
- fix hardcoded file paths
- add comment in commit msg about script that vmtest.sh was based off of
- Add tools/testing/selftest/vsock/Makefile for kselftest
- Link to v2: https://lore.kernel.org/r/20250417-vsock-vmtest-v2-1-3901a27331e8@gmail.com
Changes in v2:
- add kernel oops and warnings checker
- change testname variable to use FUNCNAME
- fix spacing in test_vm_server_host_client
- add -s skip build option to vmtest.sh
- add test_vm_loopback
- pass port to vm_wait_for_listener
- fix indentation in vmtest.sh
- add vmci and hyperv to config
- changed whitespace from tabs to spaces in help string
- Link to v1: https://lore.kernel.org/r/20250410-vsock-vmtest-v1-1-f35a81dab98c@gmail.com
---
MAINTAINERS | 1 +
tools/testing/selftests/vsock/.gitignore | 2 +
tools/testing/selftests/vsock/Makefile | 17 ++
tools/testing/selftests/vsock/config | 114 +++++++++
tools/testing/selftests/vsock/settings | 1 +
tools/testing/selftests/vsock/vmtest.sh | 423 +++++++++++++++++++++++++++++++
6 files changed, 558 insertions(+)
diff --git a/MAINTAINERS b/MAINTAINERS
index 657a67f9031e..3fbdd7bbfce7 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -25751,6 +25751,7 @@ F: include/uapi/linux/vm_sockets.h
F: include/uapi/linux/vm_sockets_diag.h
F: include/uapi/linux/vsockmon.h
F: net/vmw_vsock/
+F: tools/testing/selftests/vsock/
F: tools/testing/vsock/
VMALLOC
diff --git a/tools/testing/selftests/vsock/.gitignore b/tools/testing/selftests/vsock/.gitignore
new file mode 100644
index 000000000000..9c5bf379480f
--- /dev/null
+++ b/tools/testing/selftests/vsock/.gitignore
@@ -0,0 +1,2 @@
+vmtest.log
+vsock_test
diff --git a/tools/testing/selftests/vsock/Makefile b/tools/testing/selftests/vsock/Makefile
new file mode 100644
index 000000000000..71fca0a2b8da
--- /dev/null
+++ b/tools/testing/selftests/vsock/Makefile
@@ -0,0 +1,17 @@
+# SPDX-License-Identifier: GPL-2.0
+
+CURDIR := $(abspath .)
+TOOLSDIR := $(abspath ../../..)
+
+$(OUTPUT)/vsock_test: $(TOOLSDIR)/testing/vsock/vsock_test
+ install -m 755 $< $@
+
+$(TOOLSDIR)/testing/vsock/vsock_test:
+ $(MAKE) -C $(TOOLSDIR)/testing/vsock vsock_test
+
+TEST_PROGS += vmtest.sh
+EXTRA_CLEAN += vmtest.log
+TEST_GEN_FILES := vsock_test
+
+include ../lib.mk
+
diff --git a/tools/testing/selftests/vsock/config b/tools/testing/selftests/vsock/config
new file mode 100644
index 000000000000..3bffaaf98fff
--- /dev/null
+++ b/tools/testing/selftests/vsock/config
@@ -0,0 +1,114 @@
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_BPF=y
+CONFIG_BPF_SYSCALL=y
+CONFIG_BPF_JIT=y
+CONFIG_HAVE_EBPF_JIT=y
+CONFIG_BPF_EVENTS=y
+CONFIG_FTRACE_SYSCALLS=y
+CONFIG_FUNCTION_TRACER=y
+CONFIG_HAVE_DYNAMIC_FTRACE=y
+CONFIG_DYNAMIC_FTRACE=y
+CONFIG_HAVE_KPROBES=y
+CONFIG_KPROBES=y
+CONFIG_KPROBE_EVENTS=y
+CONFIG_ARCH_SUPPORTS_UPROBES=y
+CONFIG_UPROBES=y
+CONFIG_UPROBE_EVENTS=y
+CONFIG_DEBUG_FS=y
+CONFIG_FW_CFG_SYSFS=y
+CONFIG_FW_CFG_SYSFS_CMDLINE=y
+CONFIG_DRM=y
+CONFIG_DRM_VIRTIO_GPU=y
+CONFIG_DRM_VIRTIO_GPU_KMS=y
+CONFIG_DRM_BOCHS=y
+CONFIG_VIRTIO_IOMMU=y
+CONFIG_SOUND=y
+CONFIG_SND=y
+CONFIG_SND_SEQUENCER=y
+CONFIG_SND_PCI=y
+CONFIG_SND_INTEL8X0=y
+CONFIG_SND_HDA_CODEC_REALTEK=y
+CONFIG_SECURITYFS=y
+CONFIG_CGROUP_BPF=y
+CONFIG_SQUASHFS=y
+CONFIG_SQUASHFS_XZ=y
+CONFIG_SQUASHFS_ZSTD=y
+CONFIG_FUSE_FS=y
+CONFIG_SERIO=y
+CONFIG_PCI=y
+CONFIG_INPUT=y
+CONFIG_INPUT_KEYBOARD=y
+CONFIG_KEYBOARD_ATKBD=y
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_X86_VERBOSE_BOOTUP=y
+CONFIG_VGA_CONSOLE=y
+CONFIG_FB=y
+CONFIG_FB_VESA=y
+CONFIG_FRAMEBUFFER_CONSOLE=y
+CONFIG_RTC_CLASS=y
+CONFIG_RTC_HCTOSYS=y
+CONFIG_RTC_DRV_CMOS=y
+CONFIG_HYPERVISOR_GUEST=y
+CONFIG_PARAVIRT=y
+CONFIG_KVM_GUEST=y
+CONFIG_KVM=y
+CONFIG_KVM_INTEL=y
+CONFIG_KVM_AMD=y
+CONFIG_VSOCKETS=y
+CONFIG_VSOCKETS_DIAG=y
+CONFIG_VSOCKETS_LOOPBACK=y
+CONFIG_VMWARE_VMCI_VSOCKETS=y
+CONFIG_VIRTIO_VSOCKETS=y
+CONFIG_VIRTIO_VSOCKETS_COMMON=y
+CONFIG_HYPERV_VSOCKETS=y
+CONFIG_VMWARE_VMCI=y
+CONFIG_VHOST_VSOCK=y
+CONFIG_HYPERV=y
+CONFIG_UEVENT_HELPER=n
+CONFIG_VIRTIO=y
+CONFIG_VIRTIO_PCI=y
+CONFIG_VIRTIO_MMIO=y
+CONFIG_VIRTIO_BALLOON=y
+CONFIG_NET=y
+CONFIG_NET_CORE=y
+CONFIG_NETDEVICES=y
+CONFIG_NETWORK_FILESYSTEMS=y
+CONFIG_INET=y
+CONFIG_NET_9P=y
+CONFIG_NET_9P_VIRTIO=y
+CONFIG_9P_FS=y
+CONFIG_VIRTIO_NET=y
+CONFIG_CMDLINE_OVERRIDE=n
+CONFIG_BINFMT_SCRIPT=y
+CONFIG_SHMEM=y
+CONFIG_TMPFS=y
+CONFIG_UNIX=y
+CONFIG_MODULE_SIG_FORCE=n
+CONFIG_DEVTMPFS=y
+CONFIG_TTY=y
+CONFIG_VT=y
+CONFIG_UNIX98_PTYS=y
+CONFIG_EARLY_PRINTK=y
+CONFIG_INOTIFY_USER=y
+CONFIG_BLOCK=y
+CONFIG_SCSI_LOWLEVEL=y
+CONFIG_SCSI=y
+CONFIG_SCSI_VIRTIO=y
+CONFIG_BLK_DEV_SD=y
+CONFIG_VIRTIO_CONSOLE=y
+CONFIG_WATCHDOG=y
+CONFIG_WATCHDOG_CORE=y
+CONFIG_I6300ESB_WDT=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
+CONFIG_OVERLAY_FS=y
+CONFIG_DAX=y
+CONFIG_DAX_DRIVER=y
+CONFIG_FS_DAX=y
+CONFIG_MEMORY_HOTPLUG=y
+CONFIG_MEMORY_HOTREMOVE=y
+CONFIG_ZONE_DEVICE=y
+CONFIG_FUSE_FS=y
+CONFIG_VIRTIO_FS=y
+CONFIG_VSOCKETS=y
+CONFIG_VIRTIO_VSOCKETS=y
diff --git a/tools/testing/selftests/vsock/settings b/tools/testing/selftests/vsock/settings
new file mode 100644
index 000000000000..694d70710ff0
--- /dev/null
+++ b/tools/testing/selftests/vsock/settings
@@ -0,0 +1 @@
+timeout=300
diff --git a/tools/testing/selftests/vsock/vmtest.sh b/tools/testing/selftests/vsock/vmtest.sh
new file mode 100755
index 000000000000..d7e727306175
--- /dev/null
+++ b/tools/testing/selftests/vsock/vmtest.sh
@@ -0,0 +1,423 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+#
+# Copyright (c) 2025 Meta Platforms, Inc. and affiliates
+#
+# Dependencies:
+# * virtme-ng
+# * busybox-static (used by virtme-ng)
+# * qemu (used by virtme-ng)
+
+TAP_PREFIX="# "
+VERBOSE=0
+KSFT_PASS=0
+KSFT_FAIL=1
+KSFT_SKIP=4
+SCRIPT_DIR="$(cd -P -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd -P)"
+VSOCK_TEST=${SCRIPT_DIR}/vsock_test
+
+TEST_GUEST_PORT=51000
+TEST_HOST_PORT=50000
+TEST_HOST_PORT_LISTENER=50001
+SSH_GUEST_PORT=22
+SSH_HOST_PORT=2222
+VSOCK_CID=1234
+WAIT_PERIOD=3
+WAIT_PERIOD_MAX=20
+WAIT_TOTAL=$(( WAIT_PERIOD * WAIT_PERIOD_MAX ))
+
+QEMU_PIDFILE=/tmp/qemu.pid
+
+# virtme-ng offers a netdev for ssh when using "--ssh", but we also need a
+# control port forwarded for vsock_test. Because virtme-ng doesn't support
+# adding an additional port to forward to the device created from "--ssh" and
+# virtme-init mistakenly sets identical IPs to the ssh device and additional
+# devices, we instead opt out of using --ssh, add the device manually, and also
+# add the kernel cmdline options that virtme-init uses to setup the interface.
+QEMU_TEST_PORT_FWD="hostfwd=tcp::${TEST_HOST_PORT}-:${TEST_GUEST_PORT}"
+QEMU_SSH_PORT_FWD="hostfwd=tcp::${SSH_HOST_PORT}-:${SSH_GUEST_PORT}"
+QEMU_OPTS="\
+ -netdev user,id=n0,${QEMU_TEST_PORT_FWD},${QEMU_SSH_PORT_FWD} \
+ -device virtio-net-pci,netdev=n0 \
+ -device vhost-vsock-pci,guest-cid=${VSOCK_CID} \
+ --pidfile ${QEMU_PIDFILE} \
+"
+KERNEL_CMDLINE="virtme.dhcp net.ifnames=0 biosdevname=0 virtme.ssh virtme_ssh_user=$USER"
+
+LOG=${SCRIPT_DIR}/vmtest.log
+
+TEST_NAMES=(vm_server_host_client vm_client_host_server vm_loopback)
+TEST_DESCS=(
+ "Run vsock_test in server mode on the VM and in client mode on the host."
+ "Run vsock_test in client mode on the VM and in server mode on the host."
+ "Run vsock_test using the loopback transport in the VM."
+)
+
+usage() {
+ local name
+ local desc
+ local i
+ echo
+ echo "$0 [OPTIONS] [TEST]..."
+ echo "If no TEST argument is given, all tests will be run."
+ echo
+ echo "Options"
+ echo " -v: verbose output"
+ echo
+ echo "Available tests"
+
+ for ((i = 0; i < ${#TEST_NAMES[@]}; i++)); do
+ name=${TEST_NAMES[${i}]}
+ desc=${TEST_DESCS[${i}]}
+ printf "\t%-35s%-35s\n" "${name}" "${desc}"
+ done
+ echo
+
+ exit 1
+}
+
+die() {
+ echo "$*" >&2
+ exit ${KSFT_FAIL}
+}
+
+vm_ssh() {
+ ssh -q -o UserKnownHostsFile=/dev/null -p ${SSH_HOST_PORT} localhost $*
+ return $?
+}
+
+cleanup() {
+ if [[ -f "${QEMU_PIDFILE}" ]]; then
+ pkill -SIGTERM -F ${QEMU_PIDFILE} 2>&1 > /dev/null
+ fi
+}
+
+check_args() {
+ local found
+
+ for arg in "$@"; do
+ found=0
+ for name in "${TEST_NAMES[@]}"; do
+ if [[ "${name}" = "${arg}" ]]; then
+ found=1
+ break
+ fi
+ done
+
+ if [[ "${found}" -eq 0 ]]; then
+ echo "${arg} is not an available test" >&2
+ usage
+ fi
+ done
+
+ for arg in "$@"; do
+ if ! command -v > /dev/null "test_${arg}"; then
+ echo "Test ${arg} not found" >&2
+ usage
+ fi
+ done
+}
+
+check_deps() {
+ for dep in vng ${QEMU} busybox timeout pkill ssh; do
+ if [[ ! -x "$(command -v ${dep})" ]]; then
+ echo -e "skip: dependency ${dep} not found!\n"
+ exit ${KSFT_SKIP}
+ fi
+ done
+
+ if [[ ! -x $(command -v ${VSOCK_TEST}) ]]; then
+ printf "skip: ${VSOCK_TEST} not found!"
+ printf " Please build the kselftest vsock target.\n"
+ exit ${KSFT_SKIP}
+ fi
+}
+
+vm_setup() {
+ local VNG_OPTS=""
+ local logfile=/dev/null
+
+ if [[ "${VERBOSE}" = 1 ]]; then
+ VNG_OPTS="--verbose"
+ logfile=/dev/stdout
+ fi
+ vng \
+ $VNG_OPTS \
+ --run \
+ --qemu-opts="${QEMU_OPTS}" \
+ --qemu="${QEMU}" \
+ --user root \
+ --append "${KERNEL_CMDLINE}" \
+ --rw &> ${logfile} &
+
+ timeout ${WAIT_TOTAL} \
+ bash -c 'while [[ ! -e '"${QEMU_PIDFILE}"' ]]; do sleep 1; done; exit 0'
+ if [[ ! $? -eq 0 ]]; then
+ die "failed to boot VM"
+ fi
+}
+
+vm_wait_for_ssh() {
+ i=0
+ while [[ true ]]; do
+ if [[ ${i} -gt ${WAIT_PERIOD_MAX} ]]; then
+ die "Timed out waiting for guest ssh"
+ fi
+ vm_ssh -- true
+ if [[ $? -eq 0 ]]; then
+ break
+ fi
+ i=$(( i + 1 ))
+ sleep ${WAIT_PERIOD}
+ done
+}
+
+wait_for_listener() {
+ local port=$1
+ local interval=$2
+ local max_intervals=$3
+ local i=0
+ while ! ss -ltn | grep -q ":${port}"; do
+ if [[ ${i} -gt ${max_intervals} ]]; then
+ die "Timed out waiting for listener on port ${port}"
+ fi
+ i=$(( i + 1 ))
+ sleep ${interval}
+ done
+}
+
+vm_wait_for_listener() {
+ local port=$1
+ vm_ssh <<EOF
+$(declare -f wait_for_listener)
+wait_for_listener ${port} ${WAIT_PERIOD} ${WAIT_PERIOD_MAX}
+EOF
+}
+
+host_wait_for_listener() {
+ wait_for_listener ${TEST_HOST_PORT_LISTENER} ${WAIT_PERIOD} ${WAIT_PERIOD_MAX}
+}
+
+__log_stdin() {
+ cat | awk '{ printf "%s:\t%s\n","'"${prefix}"'", $0 }'
+}
+
+__log_args() {
+ echo "$*" | awk '{ printf "%s:\t%s\n","'"${prefix}"'", $0 }'
+}
+
+log() {
+ local prefix="$1"
+ shift
+
+ local redirect=
+ if [[ ${VERBOSE} -eq 0 ]]; then
+ redirect=/dev/null
+ else
+ redirect=/dev/stdout
+ fi
+
+ if [[ "$#" -eq 0 ]]; then
+ __log_stdin | tee -a ${LOG} > ${redirect}
+ else
+ __log_args | tee -a ${LOG} > ${redirect}
+ fi
+}
+
+log_setup() {
+ log "setup" "$@"
+}
+
+log_host() {
+ testname=$1
+ shift
+ log "test:${testname}:host" "$@"
+}
+
+log_guest() {
+ testname=$1
+ shift
+ log "test:${testname}:guest" "$@"
+}
+
+tap_prefix() {
+ sed -e "s/^/${TAP_PREFIX}/"
+}
+
+tap_output() {
+ if [[ ! -z "$TAP_PREFIX" ]]; then
+ read str
+ echo $str
+ fi
+}
+
+test_vm_server_host_client() {
+ local testname="${FUNCNAME[0]#test_}"
+
+ vm_ssh -- "${VSOCK_TEST}" \
+ --mode=server \
+ --control-port="${TEST_GUEST_PORT}" \
+ --peer-cid=2 \
+ 2>&1 | log_guest "${testname}" &
+
+ vm_wait_for_listener ${TEST_GUEST_PORT}
+
+ ${VSOCK_TEST} \
+ --mode=client \
+ --control-host=127.0.0.1 \
+ --peer-cid="${VSOCK_CID}" \
+ --control-port="${TEST_HOST_PORT}" 2>&1 | log_host "${testname}"
+
+ return $?
+}
+
+test_vm_client_host_server() {
+ local testname="${FUNCNAME[0]#test_}"
+
+ ${VSOCK_TEST} \
+ --mode "server" \
+ --control-port "${TEST_HOST_PORT_LISTENER}" \
+ --peer-cid "${VSOCK_CID}" 2>&1 | log_host "${testname}" &
+
+ host_wait_for_listener
+
+ vm_ssh -- "${VSOCK_TEST}" \
+ --mode=client \
+ --control-host=10.0.2.2 \
+ --peer-cid=2 \
+ --control-port="${TEST_HOST_PORT_LISTENER}" 2>&1 | log_guest "${testname}"
+
+ return $?
+}
+
+test_vm_loopback() {
+ local testname="${FUNCNAME[0]#test_}"
+ local port=60000 # non-forwarded local port
+
+ vm_ssh -- ${VSOCK_TEST} \
+ --mode=server \
+ --control-port="${port}" \
+ --peer-cid=1 2>&1 | log_guest "${testname}" &
+
+ vm_wait_for_listener ${port}
+
+ vm_ssh -- ${VSOCK_TEST} \
+ --mode=client \
+ --control-host="127.0.0.1" \
+ --control-port="${port}" \
+ --peer-cid=1 2>&1 | log_guest "${testname}"
+
+ return $?
+}
+
+run_test() {
+ unset IFS
+ local host_oops_cnt_before
+ local host_warn_cnt_before
+ local vm_oops_cnt_before
+ local vm_warn_cnt_before
+ local host_oops_cnt_after
+ local host_warn_cnt_after
+ local vm_oops_cnt_after
+ local vm_warn_cnt_after
+ local name
+ local rc
+
+ host_oops_cnt_before=$(dmesg | grep -c -i 'Oops')
+ host_warn_cnt_before=$(dmesg --level=warn | wc -l)
+ vm_oops_cnt_before=$(vm_ssh -- dmesg | grep -c -i 'Oops')
+ vm_warn_cnt_before=$(vm_ssh -- dmesg --level=warn | wc -l)
+
+ name=$(echo "${1}" | awk '{ print $1 }')
+ eval test_"${name}"
+ rc=$?
+
+ host_oops_cnt_after=$(dmesg | grep -i 'Oops' | wc -l)
+ if [[ ${host_oops_cnt_after} -gt ${host_oops_cnt_before} ]]; then
+ echo "${name}: kernel oops detected on host" | log_host ${name}
+ rc=$KSFT_FAIL
+ fi
+
+ host_warn_cnt_after=$(dmesg --level=warn | wc -l)
+ if [[ ${host_warn_cnt_after} -gt ${host_warn_cnt_before} ]]; then
+ echo "${name}: kernel warning detected on host" | log_host ${name}
+ rc=$KSFT_FAIL
+ fi
+
+ vm_oops_cnt_after=$(vm_ssh -- dmesg | grep -i 'Oops' | wc -l)
+ if [[ ${vm_oops_cnt_after} -gt ${vm_oops_cnt_before} ]]; then
+ echo "${name}: kernel oops detected on vm" | log_host ${name}
+ rc=$KSFT_FAIL
+ fi
+
+ vm_warn_cnt_after=$(vm_ssh -- dmesg --level=warn | wc -l)
+ if [[ ${vm_warn_cnt_after} -gt ${vm_warn_cnt_before} ]]; then
+ echo "${name}: kernel warning detected on vm" | log_host ${name}
+ rc=$KSFT_FAIL
+ fi
+
+ return ${rc}
+}
+
+while getopts :hvsq: o
+do
+ case $o in
+ v) VERBOSE=1;;
+ q) QEMU=$OPTARG;;
+ h|*) usage;;
+ esac
+done
+shift $((OPTIND-1))
+
+trap cleanup EXIT
+
+if [[ ${#} -eq 0 ]]; then
+ ARGS=(${TEST_NAMES[@]})
+else
+ ARGS=($@)
+fi
+
+check_args "${ARGS[@]}"
+check_deps
+
+QEMU=$(command -v ${QEMU:-qemu-system-$(uname -m)})
+
+echo "TAP version 13" | tap_output
+echo "1..${#ARGS[@]}" | tap_output
+
+rm -f "${LOG}"
+log_setup "Booting up VM"
+vm_setup
+vm_wait_for_ssh
+log_setup "VM booted up"
+
+cnt_pass=0
+cnt_fail=0
+cnt_skip=0
+cnt_total=0
+exitcode=0
+for arg in "${ARGS[@]}"; do
+ run_test "${arg}"
+ rc=$?
+ if [[ ${rc} == $KSFT_PASS ]]; then
+ cnt_pass=$(( cnt_pass + 1 ))
+ echo "[PASS]" | tap_prefix
+ echo "ok ${cnt_total} ${arg}" | tap_output
+ elif [[ ${rc} == $KSFT_SKIP ]]; then
+ cnt_skip=$(( cnt_skip + 1 ))
+ echo "[SKIP]" | tap_prefix
+ echo "ok ${cnt_total} ${arg} # SKIP" | tap_output
+ exitcode=$KSFT_SKIP
+ elif [[ ${rc} == $KSFT_FAIL ]]; then
+ cnt_fail=$(( cnt_fail + 1 ))
+ echo "[FAIL]" | tap_prefix
+ echo "not ok ${cnt_fail} ${arg} # exit=$rc" | tap_output
+ exitcode=$KSFT_FAIL
+ fi
+ cnt_total=$(( cnt_total + 1 ))
+done
+
+echo "SUMMARY: PASS=${cnt_pass} SKIP=${cnt_skip} FAIL=${cnt_fail}" | tap_prefix
+echo "1..${cnt_total}" | tap_output
+
+exit ${rc}
---
base-commit: 8066e388be48f1ad62b0449dc1d31a25489fa12a
change-id: 20250325-vsock-vmtest-b3a21d2102c2
Best regards,
--
Bobby Eshleman <bobbyeshleman(a)gmail.com>
5 months, 1 week
- 2
- 2
[PATCH] selftests: add missing include
by Chen Linxuan
I failed to build this test on Ubuntu 24.04.
Compiler complained about undefined functions mount, umount and some
mount related flags.
Signed-off-by: Chen Linxuan <chenlinxuan(a)uniontech.com>
---
tools/testing/selftests/pid_namespace/pid_max.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/tools/testing/selftests/pid_namespace/pid_max.c b/tools/testing/selftests/pid_namespace/pid_max.c
index 51c414faabb0f..972bedc475f12 100644
--- a/tools/testing/selftests/pid_namespace/pid_max.c
+++ b/tools/testing/selftests/pid_namespace/pid_max.c
@@ -11,6 +11,7 @@
#include <string.h>
#include <syscall.h>
#include <sys/wait.h>
+#include <sys/mount.h>
#include "../kselftest_harness.h"
#include "../pidfd/pidfd.h"
--
2.43.0
5 months, 1 week
- 1
- 0
[PATCH] selftests: size: fix grammar and align output formatting
by Abdelrahman Fekry
Improve the grammar in the test name by changing "get runtime memory use"
to "get runtime memory usage". Also adjust spacing in output lines
("Total:", "Free:", etc.) to ensure consistent alignment and readability.
Signed-off-by: Abdelrahman Fekry <AbdelrahmanFekry375(a)gmail.com>
---
tools/testing/selftests/size/get_size.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/tools/testing/selftests/size/get_size.c b/tools/testing/selftests/size/get_size.c
index 2980b1a63366..d5b67c073d8e 100644
--- a/tools/testing/selftests/size/get_size.c
+++ b/tools/testing/selftests/size/get_size.c
@@ -86,7 +86,7 @@ void _start(void)
int ccode;
struct sysinfo info;
unsigned long used;
- static const char *test_name = " get runtime memory use\n";
+ static const char *test_name = " get runtime memory usage\n";
print("TAP version 13\n");
print("# Testing system size.\n");
@@ -105,8 +105,8 @@ void _start(void)
used = info.totalram - info.freeram - info.bufferram;
print("# System runtime memory report (units in Kilobytes):\n");
print(" ---\n");
- print_k_value(" Total: ", info.totalram, info.mem_unit);
- print_k_value(" Free: ", info.freeram, info.mem_unit);
+ print_k_value(" Total : ", info.totalram, info.mem_unit);
+ print_k_value(" Free : ", info.freeram, info.mem_unit);
print_k_value(" Buffer: ", info.bufferram, info.mem_unit);
print_k_value(" In use: ", used, info.mem_unit);
print(" ...\n");
--
2.25.1
5 months, 2 weeks
- 1
- 0
[PATCH] Fix typo in 'limit' for bpf test
by Thomas Thelen
Signed-off-by: Thomas Thelen <tommythelen(a)gmail.com>
---
tools/testing/selftests/bpf/bench.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/testing/selftests/bpf/bench.c b/tools/testing/selftests/bpf/bench.c
index 1bd403a5ef7b..b25db4142126 100644
--- a/tools/testing/selftests/bpf/bench.c
+++ b/tools/testing/selftests/bpf/bench.c
@@ -497,7 +497,7 @@ extern const struct bench bench_rename_rawtp;
extern const struct bench bench_rename_fentry;
extern const struct bench bench_rename_fexit;
-/* pure counting benchmarks to establish theoretical lmits */
+/* pure counting benchmarks to establish theoretical limits */
extern const struct bench bench_trig_usermode_count;
extern const struct bench bench_trig_syscall_count;
extern const struct bench bench_trig_kernel_count;
--
2.48.1
5 months, 2 weeks
- 1
- 0
[RFC PATCH 00/39] 1G page support for guest_memfd
by Ackerley Tng
Hello,
This patchset is our exploration of how to support 1G pages in guest_memfd, and
how the pages will be used in Confidential VMs.
The patchset covers:
+ How to get 1G pages
+ Allowing mmap() of guest_memfd to userspace so that both private and shared
memory can use the same physical pages
+ Splitting and reconstructing pages to support conversions and mmap()
+ How the VM, userspace and guest_memfd interact to support conversions
+ Selftests to test all the above
+ Selftests also demonstrate the conversion flow between VM, userspace and
guest_memfd.
Why 1G pages in guest memfd?
Bring guest_memfd to performance and memory savings parity with VMs that are
backed by HugeTLBfs.
+ Performance is improved with 1G pages by more TLB hits and faster page walks
on TLB misses.
+ Memory savings from 1G pages comes from HugeTLB Vmemmap Optimization (HVO).
Options for 1G page support:
1. HugeTLB
2. Contiguous Memory Allocator (CMA)
3. Other suggestions are welcome!
Comparison between options:
1. HugeTLB
+ Refactor HugeTLB to separate allocator from the rest of HugeTLB
+ Pro: Graceful transition for VMs backed with HugeTLB to guest_memfd
+ Near term: Allows co-tenancy of HugeTLB and guest_memfd backed VMs
+ Pro: Can provide iterative steps toward new future allocator
+ Unexplored: Managing userspace-visible changes
+ e.g. HugeTLB's free_hugepages will decrease if HugeTLB is used,
but not when future allocator is used
2. CMA
+ Port some HugeTLB features to be applied on CMA
+ Pro: Clean slate
What would refactoring HugeTLB involve?
(Some refactoring was done in this RFC, more can be done.)
1. Broadly involves separating the HugeTLB allocator from the rest of HugeTLB
+ Brings more modularity to HugeTLB
+ No functionality change intended
+ Likely step towards HugeTLB's integration into core-mm
2. guest_memfd will use just the allocator component of HugeTLB, not including
the complex parts of HugeTLB like
+ Userspace reservations (resv_map)
+ Shared PMD mappings
+ Special page walkers
What features would need to be ported to CMA?
+ Improved allocation guarantees
+ Per NUMA node pool of huge pages
+ Subpools per guest_memfd
+ Memory savings
+ Something like HugeTLB Vmemmap Optimization
+ Configuration/reporting features
+ Configuration of number of pages available (and per NUMA node) at and
after host boot
+ Reporting of memory usage/availability statistics at runtime
HugeTLB was picked as the source of 1G pages for this RFC because it allows a
graceful transition, and retains memory savings from HVO.
To illustrate this, if a host machine uses HugeTLBfs to back VMs, and a
confidential VM were to be scheduled on that host, some HugeTLBfs pages would
have to be given up and returned to CMA for guest_memfd pages to be rebuilt from
that memory. This requires memory to be reserved for HVO to be removed and
reapplied on the new guest_memfd memory. This not only slows down memory
allocation but also trims the benefits of HVO. Memory would have to be reserved
on the host to facilitate these transitions.
Improving how guest_memfd uses the allocator in a future revision of this RFC:
To provide an easier transition away from HugeTLB, guest_memfd's use of HugeTLB
should be limited to these allocator functions:
+ reserve(node, page_size, num_pages) => opaque handle
+ Used when a guest_memfd inode is created to reserve memory from backend
allocator
+ allocate(handle, mempolicy, page_size) => folio
+ To allocate a folio from guest_memfd's reservation
+ split(handle, folio, target_page_size) => void
+ To take a huge folio, and split it to smaller folios, restore to filemap
+ reconstruct(handle, first_folio, nr_pages) => void
+ To take a folio, and reconstruct a huge folio out of nr_pages from the
first_folio
+ free(handle, folio) => void
+ To return folio to guest_memfd's reservation
+ error(handle, folio) => void
+ To handle memory errors
+ unreserve(handle) => void
+ To return guest_memfd's reservation to allocator backend
Userspace should only provide a page size when creating a guest_memfd and should
not have to specify HugeTLB.
Overview of patches:
+ Patches 01-12
+ Many small changes to HugeTLB, mostly to separate HugeTLBfs concepts from
HugeTLB, and to expose HugeTLB functions.
+ Patches 13-16
+ Letting guest_memfd use HugeTLB
+ Creation of each guest_memfd reserves pages from HugeTLB's global hstate
and puts it into the guest_memfd inode's subpool
+ Each folio allocation takes a page from the guest_memfd inode's subpool
+ Patches 17-21
+ Selftests for new HugeTLB features in guest_memfd
+ Patches 22-24
+ More small changes on the HugeTLB side to expose functions needed by
guest_memfd
+ Patch 25:
+ Uses the newly available functions from patches 22-24 to split HugeTLB
pages. In this patch, HugeTLB folios are always split to 4K before any
usage, private or shared.
+ Patches 26-28
+ Allow mmap() in guest_memfd and faulting in shared pages
+ Patch 29
+ Enables conversion between private/shared pages
+ Patch 30
+ Required to zero folios after conversions to avoid leaking initialized
kernel memory
+ Patch 31-38
+ Add selftests to test mapping pages to userspace, guest/host memory
sharing and update conversions tests
+ Patch 33 illustrates the conversion flow between VM/userspace/guest_memfd
+ Patch 39
+ Dynamically split and reconstruct HugeTLB pages instead of always
splitting before use. All earlier selftests are expected to still pass.
TODOs:
+ Add logic to wait for safe_refcount [1]
+ Look into lazy splitting/reconstruction of pages
+ Currently, when the KVM_SET_MEMORY_ATTRIBUTES is invoked, not only is the
mem_attr_array and faultability updated, the pages in the requested range
are also split/reconstructed as necessary. We want to look into delaying
splitting/reconstruction to fault time.
+ Solve race between folios being faulted in and being truncated
+ When running private_mem_conversions_test with more than 1 vCPU, a folio
getting truncated may get faulted in by another process, causing elevated
mapcounts when the folio is freed (VM_BUG_ON_FOLIO).
+ Add intermediate splits (1G should first split to 2M and not split directly to
4K)
+ Use guest's lock instead of hugetlb_lock
+ Use multi-index xarray/replace xarray with some other data struct for
faultability flag
+ Refactor HugeTLB better, present generic allocator interface
Please let us know your thoughts on:
+ HugeTLB as the choice of transitional allocator backend
+ Refactoring HugeTLB to provide generic allocator interface
+ Shared/private conversion flow
+ Requiring user to request kernel to unmap pages from userspace using
madvise(MADV_DONTNEED)
+ Failing conversion on elevated mapcounts/pincounts/refcounts
+ Process of splitting/reconstructing page
+ Anything else!
[1] https://lore.kernel.org/all/20240829-guest-memfd-lib-v2-0-b9afc1ff3656@quic…
Ackerley Tng (37):
mm: hugetlb: Simplify logic in dequeue_hugetlb_folio_vma()
mm: hugetlb: Refactor vma_has_reserves() to should_use_hstate_resv()
mm: hugetlb: Remove unnecessary check for avoid_reserve
mm: mempolicy: Refactor out policy_node_nodemask()
mm: hugetlb: Refactor alloc_buddy_hugetlb_folio_with_mpol() to
interpret mempolicy instead of vma
mm: hugetlb: Refactor dequeue_hugetlb_folio_vma() to use mpol
mm: hugetlb: Refactor out hugetlb_alloc_folio
mm: truncate: Expose preparation steps for truncate_inode_pages_final
mm: hugetlb: Expose hugetlb_subpool_{get,put}_pages()
mm: hugetlb: Add option to create new subpool without using surplus
mm: hugetlb: Expose hugetlb_acct_memory()
mm: hugetlb: Move and expose hugetlb_zero_partial_page()
KVM: guest_memfd: Make guest mem use guest mem inodes instead of
anonymous inodes
KVM: guest_memfd: hugetlb: initialization and cleanup
KVM: guest_memfd: hugetlb: allocate and truncate from hugetlb
KVM: guest_memfd: Add page alignment check for hugetlb guest_memfd
KVM: selftests: Add basic selftests for hugetlb-backed guest_memfd
KVM: selftests: Support various types of backing sources for private
memory
KVM: selftests: Update test for various private memory backing source
types
KVM: selftests: Add private_mem_conversions_test.sh
KVM: selftests: Test that guest_memfd usage is reported via hugetlb
mm: hugetlb: Expose vmemmap optimization functions
mm: hugetlb: Expose HugeTLB functions for promoting/demoting pages
mm: hugetlb: Add functions to add/move/remove from hugetlb lists
KVM: guest_memfd: Track faultability within a struct kvm_gmem_private
KVM: guest_memfd: Allow mmapping guest_memfd files
KVM: guest_memfd: Use vm_type to determine default faultability
KVM: Handle conversions in the SET_MEMORY_ATTRIBUTES ioctl
KVM: guest_memfd: Handle folio preparation for guest_memfd mmap
KVM: selftests: Allow vm_set_memory_attributes to be used without
asserting return value of 0
KVM: selftests: Test using guest_memfd memory from userspace
KVM: selftests: Test guest_memfd memory sharing between guest and host
KVM: selftests: Add notes in private_mem_kvm_exits_test for mmap-able
guest_memfd
KVM: selftests: Test that pinned pages block KVM from setting memory
attributes to PRIVATE
KVM: selftests: Refactor vm_mem_add to be more flexible
KVM: selftests: Add helper to perform madvise by memslots
KVM: selftests: Update private_mem_conversions_test for mmap()able
guest_memfd
Vishal Annapurve (2):
KVM: guest_memfd: Split HugeTLB pages for guest_memfd use
KVM: guest_memfd: Dynamically split/reconstruct HugeTLB page
fs/hugetlbfs/inode.c | 35 +-
include/linux/hugetlb.h | 54 +-
include/linux/kvm_host.h | 1 +
include/linux/mempolicy.h | 2 +
include/linux/mm.h | 1 +
include/uapi/linux/kvm.h | 26 +
include/uapi/linux/magic.h | 1 +
mm/hugetlb.c | 346 ++--
mm/hugetlb_vmemmap.h | 11 -
mm/mempolicy.c | 36 +-
mm/truncate.c | 26 +-
tools/include/linux/kernel.h | 4 +-
tools/testing/selftests/kvm/Makefile | 3 +
.../kvm/guest_memfd_hugetlb_reporting_test.c | 222 +++
.../selftests/kvm/guest_memfd_pin_test.c | 104 ++
.../selftests/kvm/guest_memfd_sharing_test.c | 160 ++
.../testing/selftests/kvm/guest_memfd_test.c | 238 ++-
.../testing/selftests/kvm/include/kvm_util.h | 45 +-
.../testing/selftests/kvm/include/test_util.h | 18 +
tools/testing/selftests/kvm/lib/kvm_util.c | 443 +++--
tools/testing/selftests/kvm/lib/test_util.c | 99 ++
.../kvm/x86_64/private_mem_conversions_test.c | 158 +-
.../x86_64/private_mem_conversions_test.sh | 91 +
.../kvm/x86_64/private_mem_kvm_exits_test.c | 11 +-
virt/kvm/guest_memfd.c | 1563 ++++++++++++++++-
virt/kvm/kvm_main.c | 17 +
virt/kvm/kvm_mm.h | 16 +
27 files changed, 3288 insertions(+), 443 deletions(-)
create mode 100644 tools/testing/selftests/kvm/guest_memfd_hugetlb_reporting_test.c
create mode 100644 tools/testing/selftests/kvm/guest_memfd_pin_test.c
create mode 100644 tools/testing/selftests/kvm/guest_memfd_sharing_test.c
create mode 100755 tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.sh
--
2.46.0.598.g6f2099f65c-goog
5 months, 2 weeks
- 17
- 129
[PATCH] selftests: Suppress unused variable warning
by Chen Linxuan
When running `make kselftest`, the following compilation warning was encountered:
mount-notify_test.c: In function ‘fanotify_rmdir’:
mount-notify_test.c:490:17: warning: ignoring return value of ‘chdir’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
490 | chdir("/");
| ^~~~~~~~~~
This patch addresses the warning by
explicitly suppressing the unused result of the `chdir` function.
Signed-off-by: Chen Linxuan <chenlinxuan(a)uniontech.com>
---
.../selftests/filesystems/mount-notify/mount-notify_test.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/filesystems/mount-notify/mount-notify_test.c b/tools/testing/selftests/filesystems/mount-notify/mount-notify_test.c
index 59a71f22fb118..de847e2b12017 100644
--- a/tools/testing/selftests/filesystems/mount-notify/mount-notify_test.c
+++ b/tools/testing/selftests/filesystems/mount-notify/mount-notify_test.c
@@ -487,7 +487,9 @@ TEST_F(fanotify, rmdir)
ASSERT_GE(ret, 0);
if (ret == 0) {
- chdir("/");
+ // Suppress -Wunused-result
+ // Ref: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66425#c34
+ (void) !chdir("/");
unshare(CLONE_NEWNS);
mount("", "/", NULL, MS_REC|MS_PRIVATE, NULL);
umount2("/a", MNT_DETACH);
--
2.43.0
5 months, 2 weeks
- 1
- 0
[PATCH net-next v14 0/9] Device memory TCP TX
by Mina Almasry
v14: https://lore.kernel.org/netdev/20250429032645.363766-1-almasrymina@google.c…
===
Picked up acks from Paolo, and addressed feedback from Paolo and Jakub.
Changelog:
- Fix issue in patch 4 where sockc_valid == false but err is
overwritten.
- Addressed nits.
v13: https://lore.kernel.org/netdev/20250425204743.617260-1-almasrymina@google.c…
===
Changelog:
- Fix unneeded error label pointed out by Christoph, and addressed
nitpick.
v12: https://lore.kernel.org/netdev/20250423031117.907681-1-almasrymina@google.c…
====
No changes in v12, just restored the selftests patch I accidentally dropped in
v11
v11: https://lore.kernel.org/netdev/20250423031117.907681-1-almasrymina@google.c…
====
Addressed a couple of nits and collected Acked-by from Harshitha
(thanks!)
v10: https://lore.kernel.org/netdev/20250417231540.2780723-1-almasrymina@google.…
====
Addressed comments following conversations with Pavel, Stan, and
Harshitha. Thank you guys for the reviews again. Overall minor changes:
Changelog:
- Check for !niov->pp in io_zcrx_recv_frag, just in case we end up with
a TX niov in that path (Pavel).
- Fix locking case in !netif_device_present (Jakub/Stan).
v9: https://lore.kernel.org/netdev/20250415224756.152002-1-almasrymina@google.c…
===
Changelog:
- Use priv->bindings list instead of sock_bindings_list. This was missed
during the rebase as the bindings have been updated to use
priv->bindings recently (thanks Stan!)
v8: https://lore.kernel.org/netdev/20250308214045.1160445-1-almasrymina@google.…
===
Only address minor comments on V7
Changelog:
- Use netdev locking instead of rtnl_locking to match rx path.
- Now that iouring zcrx is in net-next, use NET_IOV_IOURING instead of
NET_IOV_UNSPECIFIED.
- Post send binding to net_devmem_dmabuf_bindings after it's been fully
initialized (Stan).
v7: https://lore.kernel.org/netdev/20250227041209.2031104-1-almasrymina@google.…
===
Changelog:
- Check the dmabuf net_iov binding belongs to the device the TX is going
out on. (Jakub)
- Provide detailed inspection of callsites of
__skb_frag_ref/skb_page_unref in patch 2's changelog (Jakub)
v6: https://lore.kernel.org/netdev/20250222191517.743530-1-almasrymina@google.c…
===
v6 has no major changes. Addressed a few issues from Paolo and David,
and collected Acks from Stan. Thank you everyone for the review!
Changes:
- retain behavior to process MSG_FASTOPEN even if the provided cmsg is
invalid (Paolo).
- Rework the freeing of tx_vec slightly (it now has its own err label).
(Paolo).
- Squash the commit that makes dmabuf unbinding scheduled work into the
same one which implements the TX path so we don't run into future
errors on bisecting (Paolo).
- Fix/add comments to explain how dmabuf binding refcounting works
(David).
v5: https://lore.kernel.org/netdev/20250220020914.895431-1-almasrymina@google.c…
===
v5 has no major changes; it clears up the relatively minor issues
pointed out to in v4, and rebases the series on top of net-next to
resolve the conflict with a patch that raced to the tree. It also
collects the review tags from v4.
Changes:
- Rebase to net-next
- Fix issues in selftest (Stan).
- Address comments in the devmem and netmem driver docs (Stan and Bagas)
- Fix zerocopy_fill_skb_from_devmem return error code (Stan).
v4: https://lore.kernel.org/netdev/20250203223916.1064540-1-almasrymina@google.…
===
v4 mainly addresses the critical driver support issue surfaced in v3 by
Paolo and Stan. Drivers aiming to support netmem_tx should make sure not
to pass the netmem dma-addrs to the dma-mapping APIs, as these dma-addrs
may come from dma-bufs.
Additionally other feedback from v3 is addressed.
Major changes:
- Add helpers to handle netmem dma-addrs. Add GVE support for
netmem_tx.
- Fix binding->tx_vec not being freed on error paths during the
tx binding.
- Add a minimal devmem_tx test to devmem.py.
- Clean up everything obsolete from the cover letter (Paolo).
v3: https://patchwork.kernel.org/project/netdevbpf/list/?series=929401&state=*
===
Address minor comments from RFCv2 and fix a few build warnings and
ynl-regen issues. No major changes.
RFC v2: https://patchwork.kernel.org/project/netdevbpf/list/?series=920056&state=*
=======
RFC v2 addresses much of the feedback from RFC v1. I plan on sending
something close to this as net-next reopens, sending it slightly early
to get feedback if any.
Major changes:
--------------
- much improved UAPI as suggested by Stan. We now interpret the iov_base
of the passed in iov from userspace as the offset into the dmabuf to
send from. This removes the need to set iov.iov_base = NULL which may
be confusing to users, and enables us to send multiple iovs in the
same sendmsg() call. ncdevmem and the docs show a sample use of that.
- Removed the duplicate dmabuf iov_iter in binding->iov_iter. I think
this is good improvment as it was confusing to keep track of
2 iterators for the same sendmsg, and mistracking both iterators
caused a couple of bugs reported in the last iteration that are now
resolved with this streamlining.
- Improved test coverage in ncdevmem. Now multiple sendmsg() are tested,
and sending multiple iovs in the same sendmsg() is tested.
- Fixed issue where dmabuf unmapping was happening in invalid context
(Stan).
====================================================================
The TX path had been dropped from the Device Memory TCP patch series
post RFCv1 [1], to make that series slightly easier to review. This
series rebases the implementation of the TX path on top of the
net_iov/netmem framework agreed upon and merged. The motivation for
the feature is thoroughly described in the docs & cover letter of the
original proposal, so I don't repeat the lengthy descriptions here, but
they are available in [1].
Full outline on usage of the TX path is detailed in the documentation
included with this series.
Test example is available via the kselftest included in the series as well.
The series is relatively small, as the TX path for this feature largely
piggybacks on the existing MSG_ZEROCOPY implementation.
Patch Overview:
---------------
1. Documentation & tests to give high level overview of the feature
being added.
1. Add netmem refcounting needed for the TX path.
2. Devmem TX netlink API.
3. Devmem TX net stack implementation.
4. Make dma-buf unbinding scheduled work to handle TX cases where it gets
freed from contexts where we can't sleep.
5. Add devmem TX documentation.
6. Add scaffolding enabling driver support for netmem_tx. Add helpers, driver
feature flag, and docs to enable drivers to declare netmem_tx support.
7. Guard netmem_tx against being enabled against drivers that don't
support it.
8. Add devmem_tx selftests. Add TX path to ncdevmem and add a test to
devmem.py.
Testing:
--------
Testing is very similar to devmem TCP RX path. The ncdevmem test used
for the RX path is now augemented with client functionality to test TX
path.
* Test Setup:
Kernel: net-next with this RFC and memory provider API cherry-picked
locally.
Hardware: Google Cloud A3 VMs.
NIC: GVE with header split & RSS & flow steering support.
Performance results are not included with this version, unfortunately.
I'm having issues running the dma-buf exporter driver against the
upstream kernel on my test setup. The issues are specific to that
dma-buf exporter and do not affect this patch series. I plan to follow
up this series with perf fixes if the tests point to issues once they're
up and running.
Special thanks to Stan who took a stab at rebasing the TX implementation
on top of the netmem/net_iov framework merged. Parts of his proposal [2]
that are reused as-is are forked off into their own patches to give full
credit.
[1] https://lore.kernel.org/netdev/20240909054318.1809580-1-almasrymina@google.…
[2] https://lore.kernel.org/netdev/20240913150913.1280238-2-sdf@fomichev.me/T/#…
Cc: sdf(a)fomichev.me
Cc: asml.silence(a)gmail.com
Cc: dw(a)davidwei.uk
Cc: Jamal Hadi Salim <jhs(a)mojatatu.com>
Cc: Victor Nogueira <victor(a)mojatatu.com>
Cc: Pedro Tammela <pctammela(a)mojatatu.com>
Cc: Samiullah Khawaja <skhawaja(a)google.com>
Cc: Kuniyuki Iwashima <kuniyu(a)amazon.com>
Mina Almasry (8):
netmem: add niov->type attribute to distinguish different net_iov
types
net: add get_netmem/put_netmem support
net: devmem: Implement TX path
net: add devmem TCP TX documentation
net: enable driver support for netmem TX
gve: add netmem TX support to GVE DQO-RDA mode
net: check for driver support in netmem TX
selftests: ncdevmem: Implement devmem TCP TX
Stanislav Fomichev (1):
net: devmem: TCP tx netlink api
Documentation/netlink/specs/netdev.yaml | 12 +
Documentation/networking/devmem.rst | 150 ++++++++-
.../networking/net_cachelines/net_device.rst | 1 +
Documentation/networking/netdev-features.rst | 5 +
Documentation/networking/netmem.rst | 23 +-
drivers/net/ethernet/google/gve/gve_main.c | 3 +
drivers/net/ethernet/google/gve/gve_tx_dqo.c | 8 +-
include/linux/netdevice.h | 2 +
include/linux/skbuff.h | 17 +-
include/linux/skbuff_ref.h | 4 +-
include/net/netmem.h | 34 +-
include/net/sock.h | 1 +
include/uapi/linux/netdev.h | 1 +
io_uring/zcrx.c | 3 +-
net/core/datagram.c | 48 ++-
net/core/dev.c | 34 +-
net/core/devmem.c | 131 ++++++--
net/core/devmem.h | 83 ++++-
net/core/netdev-genl-gen.c | 13 +
net/core/netdev-genl-gen.h | 1 +
net/core/netdev-genl.c | 80 ++++-
net/core/skbuff.c | 48 ++-
net/core/sock.c | 5 +
net/ipv4/ip_output.c | 3 +-
net/ipv4/tcp.c | 48 ++-
net/ipv6/ip6_output.c | 3 +-
net/vmw_vsock/virtio_transport_common.c | 5 +-
tools/include/uapi/linux/netdev.h | 1 +
.../selftests/drivers/net/hw/devmem.py | 26 +-
.../selftests/drivers/net/hw/ncdevmem.c | 300 +++++++++++++++++-
30 files changed, 1007 insertions(+), 86 deletions(-)
base-commit: 3e52667a9c328b3d1a1ddbbb6b8fbf63a217bda3
--
2.49.0.987.g0cc8ee98dc-goog
5 months, 2 weeks
- 3
- 11
[PATCH v2] kunit: fix longest symbol length test
by Sergio González Collado
The kunit test that checks the longests symbol length [1], has triggered
warnings in some pilelines when symbol prefixes are used [2]. The test
is adjunsted to depend on !PREFIX_SYMBOLS and !CFI_CLANG as sujested in [3]
[1] https://lore.kernel.org/rust-for-linux/CABVgOSm=5Q0fM6neBhxSbOUHBgNzmwf2V22…
[2] https://lore.kernel.org/all/20250328112156.2614513-1-arnd@kernel.org/T/#u
[3] https://lore.kernel.org/linux-kselftest/20250427200916.GA1661412@ax162/T/#t
Signed-off-by: Sergio González Collado <sergio.collado(a)gmail.com>
---
V1 -> V2: added dependency on !CFI_CLANG as suggested in [3], removed
CONFIG_ prefix
---
lib/Kconfig.debug | 2 +-
lib/tests/longest_symbol_kunit.c | 3 +--
2 files changed, 2 insertions(+), 3 deletions(-)
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index f9051ab610d5..5b33673d82da 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -2885,7 +2885,7 @@ config FORTIFY_KUNIT_TEST
config LONGEST_SYM_KUNIT_TEST
tristate "Test the longest symbol possible" if !KUNIT_ALL_TESTS
- depends on KUNIT && KPROBES
+ depends on KUNIT && KPROBES && !PREFIX_SYMBOLS && !CFI_CLANG
default KUNIT_ALL_TESTS
help
Tests the longest symbol possible
diff --git a/lib/tests/longest_symbol_kunit.c b/lib/tests/longest_symbol_kunit.c
index e3c28ff1807f..b183fb92d1b2 100644
--- a/lib/tests/longest_symbol_kunit.c
+++ b/lib/tests/longest_symbol_kunit.c
@@ -3,8 +3,7 @@
* Test the longest symbol length. Execute with:
* ./tools/testing/kunit/kunit.py run longest-symbol
* --arch=x86_64 --kconfig_add CONFIG_KPROBES=y --kconfig_add CONFIG_MODULES=y
- * --kconfig_add CONFIG_RETPOLINE=n --kconfig_add CONFIG_CFI_CLANG=n
- * --kconfig_add CONFIG_MITIGATION_RETPOLINE=n
+ * --kconfig_add CONFIG_CPU_MITIGATIONS=n
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
base-commit: ebd297a2affadb6f6f4d2e5d975c1eda18ac762d
--
2.39.2
5 months, 2 weeks
- 3
- 2
[PATCH net-next] selftests: drv-net: ping: make sure the ping test restores checksum offload
by Jakub Kicinski
The ping test flips checksum offload on and off.
Make sure the original value is restored if test fails.
Signed-off-by: Jakub Kicinski <kuba(a)kernel.org>
---
CC: shuah(a)kernel.org
CC: linux-kselftest(a)vger.kernel.org
---
tools/testing/selftests/drivers/net/ping.py | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/tools/testing/selftests/drivers/net/ping.py b/tools/testing/selftests/drivers/net/ping.py
index af8df2313a3b..e0f114612c1a 100755
--- a/tools/testing/selftests/drivers/net/ping.py
+++ b/tools/testing/selftests/drivers/net/ping.py
@@ -50,6 +50,16 @@ no_sleep=False
cmd(f"echo {test_string} | socat -t 2 -u STDIN TCP:{cfg.remote_baddr}:{port}", shell=True)
ksft_eq(nc.stdout.strip(), test_string)
+def _schedule_checksum_reset(cfg, netnl) -> None:
+ features = ethtool(f"-k {cfg.ifname}", json=True)
+ setting = ""
+ for side in ["tx", "rx"]:
+ f = features[0][side + "-checksumming"]
+ if not f["fixed"]:
+ setting += " " + side
+ setting += " " + ("on" if f["requested"] or f["active"] else "off")
+ defer(ethtool, f" -K {cfg.ifname} " + setting)
+
def _set_offload_checksum(cfg, netnl, on) -> None:
try:
ethtool(f" -K {cfg.ifname} rx {on} tx {on} ")
@@ -139,6 +149,7 @@ no_sleep=False
def test_default_v4(cfg, netnl) -> None:
cfg.require_ipver("4")
+ _schedule_checksum_reset(cfg, netnl)
_set_offload_checksum(cfg, netnl, "off")
_test_v4(cfg)
_test_tcp(cfg)
@@ -149,6 +160,7 @@ no_sleep=False
def test_default_v6(cfg, netnl) -> None:
cfg.require_ipver("6")
+ _schedule_checksum_reset(cfg, netnl)
_set_offload_checksum(cfg, netnl, "off")
_test_v6(cfg)
_test_tcp(cfg)
@@ -157,6 +169,7 @@ no_sleep=False
_test_tcp(cfg)
def test_xdp_generic_sb(cfg, netnl) -> None:
+ _schedule_checksum_reset(cfg, netnl)
_set_xdp_generic_sb_on(cfg)
_set_offload_checksum(cfg, netnl, "off")
_test_v4(cfg)
@@ -168,6 +181,7 @@ no_sleep=False
_test_tcp(cfg)
def test_xdp_generic_mb(cfg, netnl) -> None:
+ _schedule_checksum_reset(cfg, netnl)
_set_xdp_generic_mb_on(cfg)
_set_offload_checksum(cfg, netnl, "off")
_test_v4(cfg)
@@ -179,6 +193,7 @@ no_sleep=False
_test_tcp(cfg)
def test_xdp_native_sb(cfg, netnl) -> None:
+ _schedule_checksum_reset(cfg, netnl)
_set_xdp_native_sb_on(cfg)
_set_offload_checksum(cfg, netnl, "off")
_test_v4(cfg)
@@ -190,6 +205,7 @@ no_sleep=False
_test_tcp(cfg)
def test_xdp_native_mb(cfg, netnl) -> None:
+ _schedule_checksum_reset(cfg, netnl)
_set_xdp_native_mb_on(cfg)
_set_offload_checksum(cfg, netnl, "off")
_test_v4(cfg)
--
2.49.0
5 months, 2 weeks
- 3
- 4
[PATCHv2 net-next 0/6] selftests: net: configure rp_filter in setup_ns
by Hangbin Liu
Some distributions enable rp_filter globally by default, which can interfere
with various test cases. To address this, many tests explicitly disable
rp_filter within their scripts.
To avoid duplication and ensure consistent behavior across tests, this patch
moves the rp_filter configuration into setup_ns, applied immediately after a
new namespace is created. This change ensures that all namespace-based tests
inherit the appropriate rp_filter settings, simplifying individual test
scripts and improving maintainability.
v2: fix srv6_hl2encap_red_l2vpn_test.sh test failure (Jakub Kicinski)
Hangbin Liu (6):
selftests: net: disable rp_filter after namespace initialization
selftests: net: remove redundant rp_filter configuration
selftests: net: use setup_ns for bareudp testing
selftests: net: use setup_ns for SRv6 tests and remove rp_filter
configuration
selftests: netfilter: remove rp_filter configuration
selftests: mptcp: remove rp_filter configuration
tools/testing/selftests/net/bareudp.sh | 49 ++---------
tools/testing/selftests/net/fib_rule_tests.sh | 3 -
tools/testing/selftests/net/fib_tests.sh | 3 -
tools/testing/selftests/net/icmp_redirect.sh | 2 -
tools/testing/selftests/net/lib.sh | 2 +
.../testing/selftests/net/mptcp/mptcp_lib.sh | 2 -
.../selftests/net/netfilter/br_netfilter.sh | 3 -
.../selftests/net/netfilter/bridge_brouter.sh | 2 -
.../selftests/net/netfilter/conntrack_vrf.sh | 3 -
tools/testing/selftests/net/netfilter/ipvs.sh | 6 --
.../selftests/net/netfilter/nft_fib.sh | 2 -
.../selftests/net/netfilter/nft_nat_zones.sh | 2 -
.../testing/selftests/net/netfilter/rpath.sh | 18 ++--
.../selftests/net/srv6_end_dt46_l3vpn_test.sh | 5 --
.../selftests/net/srv6_end_dt4_l3vpn_test.sh | 5 --
.../net/srv6_end_next_csid_l3vpn_test.sh | 77 ++++-------------
.../net/srv6_end_x_next_csid_l3vpn_test.sh | 83 +++++--------------
.../net/srv6_hencap_red_l3vpn_test.sh | 74 ++++-------------
.../net/srv6_hl2encap_red_l2vpn_test.sh | 83 +++++--------------
19 files changed, 90 insertions(+), 334 deletions(-)
--
2.46.0
5 months, 2 weeks
- 4
- 11
[PATCH 0/6] mm/damon: minor fixups and improvements for code, tests, and documents
by SeongJae Park
Yet another batch of miscellaneous DAMON changes. Fix and improve minor
problems in code, tests and documents.
SeongJae Park (6):
mm/damon/core: warn and fix nr_accesses[_bp] corruption
mm/damon/sysfs-schemes: fix wrong comment on
damons_sysfs_quota_goal_metric_strs
mm/damon/paddr: remove unused variable, folio_list, in damon_pa_stat()
mm/damon/tests/core-kunit: add a test for
damos_set_filters_default_reject()
selftests/damon/_damon_sysfs: read tried regions directories in order
Docs/damon: update titles and brief introductions to explain DAMOS
Documentation/admin-guide/mm/damon/index.rst | 11 ++-
Documentation/mm/damon/index.rst | 6 +-
mm/damon/core.c | 14 ++++
mm/damon/paddr.c | 1 -
mm/damon/sysfs-schemes.c | 2 +-
mm/damon/tests/core-kunit.h | 70 +++++++++++++++++++
tools/testing/selftests/damon/_damon_sysfs.py | 5 ++
7 files changed, 98 insertions(+), 11 deletions(-)
base-commit: fb227aa50d133236ef02a71dd9e3d510f4fad42f
--
2.39.5
5 months, 2 weeks
- 1
- 2
[RESEND PATCH] selftests/bpf: Fix bpf selftest build warning
by Saket Kumar Bhaskar
On linux-next, build for bpf selftest displays a warning:
Warning: Kernel ABI header at 'tools/include/uapi/linux/if_xdp.h'
differs from latest version at 'include/uapi/linux/if_xdp.h'.
Commit 8066e388be48 ("net: add UAPI to the header guard in various network headers")
changed the header guard from _LINUX_IF_XDP_H to _UAPI_LINUX_IF_XDP_H
in include/uapi/linux/if_xdp.h.
To resolve the warning, update tools/include/uapi/linux/if_xdp.h
to align with the changes in include/uapi/linux/if_xdp.h
Fixes: 8066e388be48 ("net: add UAPI to the header guard in various network headers")
Reported-by: Venkat Rao Bagalkote <venkat88(a)linux.ibm.com>
Closes: https://lore.kernel.org/all/c2bc466d-dff2-4d0d-a797-9af7f676c065@linux.ibm.…
Tested-by: Venkat Rao Bagalkote <venkat88(a)linux.ibm.com>
Signed-off-by: Saket Kumar Bhaskar <skb99(a)linux.ibm.com>
---
[RESEND]:
- Added Fixes and Tested-by tag.
- Added Greg as receipent for driver-core tree.
Original patch: https://lore.kernel.org/all/20250509123802.695574-1-skb99@linux.ibm.com/
tools/include/uapi/linux/if_xdp.h | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/tools/include/uapi/linux/if_xdp.h b/tools/include/uapi/linux/if_xdp.h
index 42869770776e..44f2bb93e7e6 100644
--- a/tools/include/uapi/linux/if_xdp.h
+++ b/tools/include/uapi/linux/if_xdp.h
@@ -7,8 +7,8 @@
* Magnus Karlsson <magnus.karlsson(a)intel.com>
*/
-#ifndef _LINUX_IF_XDP_H
-#define _LINUX_IF_XDP_H
+#ifndef _UAPI_LINUX_IF_XDP_H
+#define _UAPI_LINUX_IF_XDP_H
#include <linux/types.h>
@@ -180,4 +180,4 @@ struct xdp_desc {
/* TX packet carries valid metadata. */
#define XDP_TX_METADATA (1 << 1)
-#endif /* _LINUX_IF_XDP_H */
+#endif /* _UAPI_LINUX_IF_XDP_H */
--
2.43.5
5 months, 2 weeks
- 3
- 2
[PATCH v2] KVM: SEV: Disable SEV-SNP support on initialization failure
by Ashish Kalra
From: Ashish Kalra <ashish.kalra(a)amd.com>
During platform init, SNP initialization may fail for several reasons,
such as firmware command failures and incompatible versions. However,
the KVM capability may continue to advertise support for it.
The platform may have SNP enabled but if SNP_INIT fails then SNP is
not supported by KVM.
During KVM module initialization query the SNP platform status to obtain
the SNP initialization state and use it as an additional condition to
determine support for SEV-SNP.
Co-developed-by: Sean Christopherson <seanjc(a)google.com>
Signed-off-by: Sean Christopherson <seanjc(a)google.com>
Co-developed-by: Pratik R. Sampat <prsampat(a)amd.com>
Signed-off-by: Pratik R. Sampat <prsampat(a)amd.com>
Signed-off-by: Ashish Kalra <ashish.kalra(a)amd.com>
---
arch/x86/kvm/svm/sev.c | 44 +++++++++++++++++++++++++++++++++---------
1 file changed, 35 insertions(+), 9 deletions(-)
diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c
index dea9480b9ff6..f7d343ab9acd 100644
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -2935,6 +2935,33 @@ void __init sev_set_cpu_caps(void)
}
}
+static bool is_sev_snp_initialized(void)
+{
+ struct sev_user_data_snp_status *status;
+ struct sev_data_snp_addr buf;
+ bool initialized = false;
+ int error, ret;
+
+ status = snp_alloc_firmware_page(GFP_KERNEL | __GFP_ZERO);
+ if (!status)
+ return false;
+
+ buf.address = __psp_pa(status);
+ ret = sev_do_cmd(SEV_CMD_SNP_PLATFORM_STATUS, &buf, &error);
+ if (ret) {
+ pr_err("SEV: SNP_PLATFORM_STATUS failed ret=%d, fw_error=%d (%#x)\n",
+ ret, error, error);
+ goto out;
+ }
+
+ initialized = !!status->state;
+
+out:
+ snp_free_firmware_page(status);
+
+ return initialized;
+}
+
void __init sev_hardware_setup(void)
{
unsigned int eax, ebx, ecx, edx, sev_asid_count, sev_es_asid_count;
@@ -3039,6 +3066,14 @@ void __init sev_hardware_setup(void)
sev_snp_supported = sev_snp_enabled && cc_platform_has(CC_ATTR_HOST_SEV_SNP);
out:
+ if (sev_enabled) {
+ init_args.probe = true;
+ if (sev_platform_init(&init_args))
+ sev_supported = sev_es_supported = sev_snp_supported = false;
+ else if (sev_snp_supported)
+ sev_snp_supported = is_sev_snp_initialized();
+ }
+
if (boot_cpu_has(X86_FEATURE_SEV))
pr_info("SEV %s (ASIDs %u - %u)\n",
sev_supported ? min_sev_asid <= max_sev_asid ? "enabled" :
@@ -3065,15 +3100,6 @@ void __init sev_hardware_setup(void)
sev_supported_vmsa_features = 0;
if (sev_es_debug_swap_enabled)
sev_supported_vmsa_features |= SVM_SEV_FEAT_DEBUG_SWAP;
-
- if (!sev_enabled)
- return;
-
- /*
- * Do both SNP and SEV initialization at KVM module load.
- */
- init_args.probe = true;
- sev_platform_init(&init_args);
}
void sev_hardware_unsetup(void)
--
2.34.1
5 months, 2 weeks
- 2
- 1
[PATCH] selftests/mincore: Added comment for minicore test
by Suresh
Signed-off-by: Suresh <suresh.k.chandrappa(a)gmail.com>
---
tools/testing/selftests/mincore/mincore_selftest.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/tools/testing/selftests/mincore/mincore_selftest.c b/tools/testing/selftests/mincore/mincore_selftest.c
index 17ed3e9917ca..c4f0d21f7678 100644
--- a/tools/testing/selftests/mincore/mincore_selftest.c
+++ b/tools/testing/selftests/mincore/mincore_selftest.c
@@ -146,6 +146,11 @@ TEST(check_huge_pages)
page_size = sysconf(_SC_PAGESIZE);
errno = 0;
+ /*
+ * Attempt to map a huge page
+ * MAP_HUGETLB flag requests a huge page allocation
+ * Size is normal page_size, but kernel uses huge page backing
+ */
addr = mmap(NULL, page_size, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS | MAP_HUGETLB,
-1, 0);
--
2.45.2
5 months, 2 weeks
- 2
- 1
[PATCH bpf-next v5 0/5] Replace CONFIG_DMABUF_SYSFS_STATS with BPF
by T.J. Mercier
Until CONFIG_DMABUF_SYSFS_STATS was added [1] it was only possible to
perform per-buffer accounting with debugfs which is not suitable for
production environments. Eventually we discovered the overhead with
per-buffer sysfs file creation/removal was significantly impacting
allocation and free times, and exacerbated kernfs lock contention. [2]
dma_buf_stats_setup() is responsible for 39% of single-page buffer
creation duration, or 74% of single-page dma_buf_export() duration when
stressing dmabuf allocations and frees.
I prototyped a change from per-buffer to per-exporter statistics with a
RCU protected list of exporter allocations that accommodates most (but
not all) of our use-cases and avoids almost all of the sysfs overhead.
While that adds less overhead than per-buffer sysfs, and less even than
the maintenance of the dmabuf debugfs_list, it's still *additional*
overhead on top of the debugfs_list and doesn't give us per-buffer info.
This series uses the existing dmabuf debugfs_list to implement a BPF
dmabuf iterator, which adds no overhead to buffer allocation/free and
provides per-buffer info. The list has been moved outside of
CONFIG_DEBUG_FS scope so that it is always populated. The BPF program
loaded by userspace that extracts per-buffer information gets to define
its own interface which avoids the lack of ABI stability with debugfs.
This will allow us to replace our use of CONFIG_DMABUF_SYSFS_STATS, and
the plan is to remove it from the kernel after the next longterm stable
release.
[1] https://lore.kernel.org/linux-media/20201210044400.1080308-1-hridya@google.…
[2] https://lore.kernel.org/all/20220516171315.2400578-1-tjmercier@google.com
v1: https://lore.kernel.org/all/20250414225227.3642618-1-tjmercier@google.com
v1 -> v2:
Make the DMA buffer list independent of CONFIG_DEBUG_FS per Christian
König
Add CONFIG_DMA_SHARED_BUFFER check to kernel/bpf/Makefile per kernel
test robot
Use BTF_ID_LIST_SINGLE instead of BTF_ID_LIST_GLOBAL_SINGLE per Song Liu
Fixup comment style, mixing code/declarations, and use ASSERT_OK_FD in
selftest per Song Liu
Add BPF_ITER_RESCHED feature to bpf_dmabuf_reg_info per Alexei
Starovoitov
Add open-coded iterator and selftest per Alexei Starovoitov
Add a second test buffer from the system dmabuf heap to selftests
Use the BPF program we'll use in production for selftest per Alexei
Starovoitov
https://r.android.com/c/platform/system/bpfprogs/+/3616123/2/dmabufIter.c
https://r.android.com/c/platform/system/memory/libmeminfo/+/3614259/1/libdm…
v2: https://lore.kernel.org/all/20250504224149.1033867-1-tjmercier@google.com
v2 -> v3:
Rebase onto bpf-next/master
Move get_next_dmabuf() into drivers/dma-buf/dma-buf.c, along with the
new get_first_dmabuf(). This avoids having to expose the dmabuf list
and mutex to the rest of the kernel, and keeps the dmabuf mutex
operations near each other in the same file. (Christian König)
Add Christian's RB to dma-buf: Rename debugfs symbols
Drop RFC: dma-buf: Remove DMA-BUF statistics
v3: https://lore.kernel.org/all/20250507001036.2278781-1-tjmercier@google.com
v3 -> v4:
Fix selftest BPF program comment style (not kdoc) per Alexei Starovoitov
Fix dma-buf.c kdoc comment style per Alexei Starovoitov
Rename get_first_dmabuf / get_next_dmabuf to dma_buf_iter_begin /
dma_buf_iter_next per Christian König
Add Christian's RB to bpf: Add dmabuf iterator
v4: https://lore.kernel.org/all/20250508182025.2961555-1-tjmercier@google.com
v4 -> v5:
Add Christian's Acks to all patches
Add Song Liu's Acks
Move BTF_ID_LIST_SINGLE and DEFINE_BPF_ITER_FUNC closer to usage per
Song Liu
Fix open-coded iterator comment style per Song Liu
Move iterator termination check to its own subtest per Song Liu
Rework selftest buffer creation per Song Liu
Fix spacing in sanitize_string per BPF CI
T.J. Mercier (5):
dma-buf: Rename debugfs symbols
bpf: Add dmabuf iterator
bpf: Add open coded dmabuf iterator
selftests/bpf: Add test for dmabuf_iter
selftests/bpf: Add test for open coded dmabuf_iter
drivers/dma-buf/dma-buf.c | 98 +++++--
include/linux/dma-buf.h | 4 +-
kernel/bpf/Makefile | 3 +
kernel/bpf/dmabuf_iter.c | 150 ++++++++++
kernel/bpf/helpers.c | 5 +
.../testing/selftests/bpf/bpf_experimental.h | 5 +
tools/testing/selftests/bpf/config | 3 +
.../selftests/bpf/prog_tests/dmabuf_iter.c | 276 ++++++++++++++++++
.../testing/selftests/bpf/progs/dmabuf_iter.c | 91 ++++++
9 files changed, 613 insertions(+), 22 deletions(-)
create mode 100644 kernel/bpf/dmabuf_iter.c
create mode 100644 tools/testing/selftests/bpf/prog_tests/dmabuf_iter.c
create mode 100644 tools/testing/selftests/bpf/progs/dmabuf_iter.c
base-commit: 43745d11bfd9683abdf08ad7a5cc403d6a9ffd15
--
2.49.0.1045.g170613ef41-goog
5 months, 2 weeks
- 2
- 9
[PATCH v6 00/14] riscv: add SBI FWFT misaligned exception delegation support
by Clément Léger
The SBI Firmware Feature extension allows the S-mode to request some
specific features (either hardware or software) to be enabled. This
series uses this extension to request misaligned access exception
delegation to S-mode in order to let the kernel handle it. It also adds
support for the KVM FWFT SBI extension based on the misaligned access
handling infrastructure.
FWFT SBI extension is part of the SBI V3.0 specifications [1]. It can be
tested using the qemu provided at [2] which contains the series from
[3]. Upstream kvm-unit-tests can be used inside kvm to tests the correct
delegation of misaligned exceptions. Upstream OpenSBI can be used.
Note: Since SBI V3.0 is not yet ratified, FWFT extension API is split
between interface only and implementation, allowing to pick only the
interface which do not have hard dependencies on SBI.
The tests can be run using the kselftest from series [4].
$ qemu-system-riscv64 \
-cpu rv64,trap-misaligned-access=true,v=true \
-M virt \
-m 1024M \
-bios fw_dynamic.bin \
-kernel Image
...
# ./misaligned
TAP version 13
1..23
# Starting 23 tests from 1 test cases.
# RUN global.gp_load_lh ...
# OK global.gp_load_lh
ok 1 global.gp_load_lh
# RUN global.gp_load_lhu ...
# OK global.gp_load_lhu
ok 2 global.gp_load_lhu
# RUN global.gp_load_lw ...
# OK global.gp_load_lw
ok 3 global.gp_load_lw
# RUN global.gp_load_lwu ...
# OK global.gp_load_lwu
ok 4 global.gp_load_lwu
# RUN global.gp_load_ld ...
# OK global.gp_load_ld
ok 5 global.gp_load_ld
# RUN global.gp_load_c_lw ...
# OK global.gp_load_c_lw
ok 6 global.gp_load_c_lw
# RUN global.gp_load_c_ld ...
# OK global.gp_load_c_ld
ok 7 global.gp_load_c_ld
# RUN global.gp_load_c_ldsp ...
# OK global.gp_load_c_ldsp
ok 8 global.gp_load_c_ldsp
# RUN global.gp_load_sh ...
# OK global.gp_load_sh
ok 9 global.gp_load_sh
# RUN global.gp_load_sw ...
# OK global.gp_load_sw
ok 10 global.gp_load_sw
# RUN global.gp_load_sd ...
# OK global.gp_load_sd
ok 11 global.gp_load_sd
# RUN global.gp_load_c_sw ...
# OK global.gp_load_c_sw
ok 12 global.gp_load_c_sw
# RUN global.gp_load_c_sd ...
# OK global.gp_load_c_sd
ok 13 global.gp_load_c_sd
# RUN global.gp_load_c_sdsp ...
# OK global.gp_load_c_sdsp
ok 14 global.gp_load_c_sdsp
# RUN global.fpu_load_flw ...
# OK global.fpu_load_flw
ok 15 global.fpu_load_flw
# RUN global.fpu_load_fld ...
# OK global.fpu_load_fld
ok 16 global.fpu_load_fld
# RUN global.fpu_load_c_fld ...
# OK global.fpu_load_c_fld
ok 17 global.fpu_load_c_fld
# RUN global.fpu_load_c_fldsp ...
# OK global.fpu_load_c_fldsp
ok 18 global.fpu_load_c_fldsp
# RUN global.fpu_store_fsw ...
# OK global.fpu_store_fsw
ok 19 global.fpu_store_fsw
# RUN global.fpu_store_fsd ...
# OK global.fpu_store_fsd
ok 20 global.fpu_store_fsd
# RUN global.fpu_store_c_fsd ...
# OK global.fpu_store_c_fsd
ok 21 global.fpu_store_c_fsd
# RUN global.fpu_store_c_fsdsp ...
# OK global.fpu_store_c_fsdsp
ok 22 global.fpu_store_c_fsdsp
# RUN global.gen_sigbus ...
[12797.988647] misaligned[618]: unhandled signal 7 code 0x1 at 0x0000000000014dc0 in misaligned[4dc0,10000+76000]
[12797.988990] CPU: 0 UID: 0 PID: 618 Comm: misaligned Not tainted 6.13.0-rc6-00008-g4ec4468967c9-dirty #51
[12797.989169] Hardware name: riscv-virtio,qemu (DT)
[12797.989264] epc : 0000000000014dc0 ra : 0000000000014d00 sp : 00007fffe165d100
[12797.989407] gp : 000000000008f6e8 tp : 0000000000095760 t0 : 0000000000000008
[12797.989544] t1 : 00000000000965d8 t2 : 000000000008e830 s0 : 00007fffe165d160
[12797.989692] s1 : 000000000000001a a0 : 0000000000000000 a1 : 0000000000000002
[12797.989831] a2 : 0000000000000000 a3 : 0000000000000000 a4 : ffffffffdeadbeef
[12797.989964] a5 : 000000000008ef61 a6 : 626769735f6e0000 a7 : fffffffffffff000
[12797.990094] s2 : 0000000000000001 s3 : 00007fffe165d838 s4 : 00007fffe165d848
[12797.990238] s5 : 000000000000001a s6 : 0000000000010442 s7 : 0000000000010200
[12797.990391] s8 : 000000000000003a s9 : 0000000000094508 s10: 0000000000000000
[12797.990526] s11: 0000555567460668 t3 : 00007fffe165d070 t4 : 00000000000965d0
[12797.990656] t5 : fefefefefefefeff t6 : 0000000000000073
[12797.990756] status: 0000000200004020 badaddr: 000000000008ef61 cause: 0000000000000006
[12797.990911] Code: 8793 8791 3423 fcf4 3783 fc84 c737 dead 0713 eef7 (c398) 0001
# OK global.gen_sigbus
ok 23 global.gen_sigbus
# PASSED: 23 / 23 tests passed.
# Totals: pass:23 fail:0 xfail:0 xpass:0 skip:0 error:0
With kvm-tools:
# lkvm run -k sbi.flat -m 128
Info: # lkvm run -k sbi.flat -m 128 -c 1 --name guest-97
Info: Removed ghost socket file "/root/.lkvm//guest-97.sock".
##########################################################################
# kvm-unit-tests
##########################################################################
... [test messages elided]
PASS: sbi: fwft: FWFT extension probing no error
PASS: sbi: fwft: get/set reserved feature 0x6 error == SBI_ERR_DENIED
PASS: sbi: fwft: get/set reserved feature 0x3fffffff error == SBI_ERR_DENIED
PASS: sbi: fwft: get/set reserved feature 0x80000000 error == SBI_ERR_DENIED
PASS: sbi: fwft: get/set reserved feature 0xbfffffff error == SBI_ERR_DENIED
PASS: sbi: fwft: misaligned_deleg: Get misaligned deleg feature no error
PASS: sbi: fwft: misaligned_deleg: Set misaligned deleg feature invalid value error
PASS: sbi: fwft: misaligned_deleg: Set misaligned deleg feature invalid value error
PASS: sbi: fwft: misaligned_deleg: Set misaligned deleg feature value no error
PASS: sbi: fwft: misaligned_deleg: Set misaligned deleg feature value 0
PASS: sbi: fwft: misaligned_deleg: Set misaligned deleg feature value no error
PASS: sbi: fwft: misaligned_deleg: Set misaligned deleg feature value 1
PASS: sbi: fwft: misaligned_deleg: Verify misaligned load exception trap in supervisor
SUMMARY: 50 tests, 2 unexpected failures, 12 skipped
This series is available at [5].
Link: https://github.com/riscv-non-isa/riscv-sbi-doc/releases/download/vv3.0-rc2/… [1]
Link: https://github.com/rivosinc/qemu/tree/dev/cleger/misaligned [2]
Link: https://lore.kernel.org/all/20241211211933.198792-3-fkonrad@amd.com/T/ [3]
Link: https://lore.kernel.org/linux-riscv/20250414123543.1615478-1-cleger@rivosin… [4]
Link: https://github.com/rivosinc/linux/tree/dev/cleger/fwft [5]
---
V6:
- Rename FWFT interface to remove "_local"
- Fix test for MEDELEG values in KVM FWFT support
- Add __init for unaligned_access_init()
- Rebased on master
V5:
- Return ERANGE as mapping for SBI_ERR_BAD_RANGE
- Removed unused sbi_fwft_get()
- Fix kernel for sbi_fwft_local_set_cpumask()
- Fix indentation for sbi_fwft_local_set()
- Remove spurious space in kvm_sbi_fwft_ops.
- Rebased on origin/master
- Remove fixes commits and sent them as a separate series [4]
V4:
- Check SBI version 3.0 instead of 2.0 for FWFT presence
- Use long for kvm_sbi_fwft operation return value
- Init KVM sbi extension even if default_disabled
- Remove revert_on_fail parameter for sbi_fwft_feature_set().
- Fix comments for sbi_fwft_set/get()
- Only handle local features (there are no globals yet in the spec)
- Add new SBI errors to sbi_err_map_linux_errno()
V3:
- Added comment about kvm sbi fwft supported/set/get callback
requirements
- Move struct kvm_sbi_fwft_feature in kvm_sbi_fwft.c
- Add a FWFT interface
V2:
- Added Kselftest for misaligned testing
- Added get_user() usage instead of __get_user()
- Reenable interrupt when possible in misaligned access handling
- Document that riscv supports unaligned-traps
- Fix KVM extension state when an init function is present
- Rework SBI misaligned accesses trap delegation code
- Added support for CPU hotplugging
- Added KVM SBI reset callback
- Added reset for KVM SBI FWFT lock
- Return SBI_ERR_DENIED_LOCKED when LOCK flag is set
Clément Léger (14):
riscv: sbi: add Firmware Feature (FWFT) SBI extensions definitions
riscv: sbi: remove useless parenthesis
riscv: sbi: add new SBI error mappings
riscv: sbi: add FWFT extension interface
riscv: sbi: add SBI FWFT extension calls
riscv: misaligned: request misaligned exception from SBI
riscv: misaligned: use on_each_cpu() for scalar misaligned access
probing
riscv: misaligned: use correct CONFIG_ ifdef for
misaligned_access_speed
riscv: misaligned: move emulated access uniformity check in a function
riscv: misaligned: add a function to check misalign trap delegability
RISC-V: KVM: add SBI extension init()/deinit() functions
RISC-V: KVM: add SBI extension reset callback
RISC-V: KVM: add support for FWFT SBI extension
RISC-V: KVM: add support for SBI_FWFT_MISALIGNED_DELEG
arch/riscv/include/asm/cpufeature.h | 8 +-
arch/riscv/include/asm/kvm_host.h | 5 +-
arch/riscv/include/asm/kvm_vcpu_sbi.h | 12 +
arch/riscv/include/asm/kvm_vcpu_sbi_fwft.h | 29 +++
arch/riscv/include/asm/sbi.h | 60 +++++
arch/riscv/include/uapi/asm/kvm.h | 1 +
arch/riscv/kernel/sbi.c | 81 ++++++-
arch/riscv/kernel/traps_misaligned.c | 110 ++++++++-
arch/riscv/kernel/unaligned_access_speed.c | 8 +-
arch/riscv/kvm/Makefile | 1 +
arch/riscv/kvm/vcpu.c | 7 +-
arch/riscv/kvm/vcpu_sbi.c | 54 +++++
arch/riscv/kvm/vcpu_sbi_fwft.c | 252 +++++++++++++++++++++
arch/riscv/kvm/vcpu_sbi_sta.c | 3 +-
14 files changed, 613 insertions(+), 18 deletions(-)
create mode 100644 arch/riscv/include/asm/kvm_vcpu_sbi_fwft.h
create mode 100644 arch/riscv/kvm/vcpu_sbi_fwft.c
--
2.49.0
5 months, 2 weeks
- 6
- 31
[PATCH bpf-next 0/4] bpf: Allow get_func_[arg|arg_cnt] helpers in raw tracepoint programs
by KaFai Wan
hi,
We can use get_func_[arg|arg_cnt] helpers in fentry/fexit/fmod_ret programs
currently[1]. But they can't be used in raw_tp/tp_btf programs.
Adding support to use get_func_[arg|arg_cnt] helpers in raw_tp/tp_btf
programs.
Adding BPF_PROG_TEST_RUN for tp_btf.
Add selftests to check them.
Thanks,
KaFai
[1] https://lore.kernel.org/bpf/20211208193245.172141-1-jolsa@kernel.org/
---
KaFai Wan (4):
bpf: Allow get_func_[arg|arg_cnt] helpers in raw tracepoint programs
bpf: Enable BPF_PROG_TEST_RUN for tp_btf
selftests/bpf: Add raw_tp_test_run for tp_btf
selftests/bpf: Add tests for get_func_[arg|arg_cnt] helpers in raw
tracepoint programs
kernel/trace/bpf_trace.c | 17 +++++--
net/bpf/test_run.c | 16 +++----
.../bpf/prog_tests/raw_tp_get_func_args.c | 48 +++++++++++++++++++
.../bpf/prog_tests/raw_tp_test_run.c | 18 ++++++-
.../bpf/progs/test_raw_tp_get_func_args.c | 47 ++++++++++++++++++
.../bpf/progs/test_raw_tp_test_run.c | 16 +++++--
6 files changed, 146 insertions(+), 16 deletions(-)
create mode 100644 tools/testing/selftests/bpf/prog_tests/raw_tp_get_func_args.c
create mode 100644 tools/testing/selftests/bpf/progs/test_raw_tp_get_func_args.c
--
2.43.0
5 months, 2 weeks
- 5
- 15
[PATCH v2 00/19] iommufd: Add VIOMMU infrastructure (Part-1)
by Nicolin Chen
This series introduces a new VIOMMU infrastructure and related ioctls.
IOMMUFD has been using the HWPT infrastructure for all cases, including a
nested IO page table support. Yet, there're limitations for an HWPT-based
structure to support some advanced HW-accelerated features, such as CMDQV
on NVIDIA Grace, and HW-accelerated vIOMMU on AMD. Even for a multi-IOMMU
environment, it is not straightforward for nested HWPTs to share the same
parent HWPT (stage-2 IO pagetable), with the HWPT infrastructure alone.
The new VIOMMU object is an additional layer, between the nested HWPT and
its parent HWPT, to give to both the IOMMUFD core and an IOMMU driver an
additional structure to support HW-accelerated feature:
----------------------------
---------------- | | paging_hwpt0 |
| hwpt_nested0 |--->| viommu0 ------------------
---------------- | | HW-accel feats |
----------------------------
On a multi-IOMMU system, the VIOMMU object can be instanced to the number
of vIOMMUs in a guest VM, while holding the same parent HWPT to share the
stage-2 IO pagetable. Each VIOMMU then just need to only allocate its own
VMID to attach the shared stage-2 IO pagetable to the physical IOMMU:
----------------------------
---------------- | | paging_hwpt0 |
| hwpt_nested0 |--->| viommu0 ------------------
---------------- | | VMID0 |
----------------------------
----------------------------
---------------- | | paging_hwpt0 |
| hwpt_nested1 |--->| viommu1 ------------------
---------------- | | VMID1 |
----------------------------
As an initial part-1, add ioctls to support a VIOMMU-based invalidation:
IOMMUFD_CMD_VIOMMU_ALLOC to allocate a VIOMMU object
IOMMUFD_CMD_VIOMMU_SET/UNSET_VDEV_ID to set/clear device's virtual ID
(Resue IOMMUFD_CMD_HWPT_INVALIDATE for a VIOMMU object to flush cache
by a given driver data)
Worth noting that the VDEV_ID is for a per-VIOMMU device list for drivers
to look up the device's physical instance from its virtual ID in a VM. It
is essential for a VIOMMU-based invalidation where the request contains a
device's virtual ID for its device cache flush, e.g. ATC invalidation.
As for the implementation of the series, add an IOMMU_VIOMMU_TYPE_DEFAULT
type for a core-allocated-core-managed VIOMMU object, allowing drivers to
simply hook a default viommu ops for viommu-based invalidation alone. And
provide some viommu helpers to drivers for VDEV_ID translation and parent
domain lookup. Add VIOMMU invalidation support to ARM SMMUv3 driver for a
real world use case. This adds supports of arm-smmuv-v3's CMDQ_OP_ATC_INV
and CMDQ_OP_CFGI_CD/ALL commands, supplementing HWPT-based invalidations.
In the future, drivers will also be able to choose a driver-managed type
to hold its own structure by adding a new type to enum iommu_viommu_type.
More VIOMMU-based structures and ioctls will be introduced in part-2/3 to
support a driver-managed VIOMMU, e.g. VQUEUE object for a HW accelerated
queue, VIRQ (or VEVENT) object for IRQ injections. Although we repurposed
the VIOMMU object from an earlier RFC discussion, for a referece:
https://lore.kernel.org/all/cover.1712978212.git.nicolinc@nvidia.com/
This series is on Github:
https://github.com/nicolinc/iommufd/commits/iommufd_viommu_p1-v2
Paring QEMU branch for testing:
https://github.com/nicolinc/qemu/commits/wip/for_iommufd_viommu_p1-v2
Changelog
v2
* Limited vdev_id to one per idev
* Added a rw_sem to protect the vdev_id list
* Reworked driver-level APIs with proper lockings
* Added a new viommu_api file for IOMMUFD_DRIVER config
* Dropped useless iommu_dev point from the viommu structure
* Added missing index numnbers to new types in the uAPI header
* Dropped IOMMU_VIOMMU_INVALIDATE uAPI; Instead, reuse the HWPT one
* Reworked mock_viommu_cache_invalidate() using the new iommu helper
* Reordered details of set/unset_vdev_id handlers for proper lockings
* Added arm_smmu_cache_invalidate_user patch from Jason's nesting series
v1
https://lore.kernel.org/all/cover.1723061377.git.nicolinc@nvidia.com/
Thanks!
Nicolin
Jason Gunthorpe (3):
iommu: Add iommu_copy_struct_from_full_user_array helper
iommu/arm-smmu-v3: Allow ATS for IOMMU_DOMAIN_NESTED
iommu/arm-smmu-v3: Update comments about ATS and bypass
Nicolin Chen (16):
iommufd: Reorder struct forward declarations
iommufd/viommu: Add IOMMUFD_OBJ_VIOMMU and IOMMU_VIOMMU_ALLOC ioctl
iommu: Pass in a viommu pointer to domain_alloc_user op
iommufd: Allow pt_id to carry viommu_id for IOMMU_HWPT_ALLOC
iommufd/selftest: Add IOMMU_VIOMMU_ALLOC test coverage
iommufd/viommu: Add IOMMU_VIOMMU_SET/UNSET_VDEV_ID ioctl
iommufd/selftest: Add IOMMU_VIOMMU_SET/UNSET_VDEV_ID test coverage
iommufd/viommu: Add cache_invalidate for IOMMU_VIOMMU_TYPE_DEFAULT
iommufd: Allow hwpt_id to carry viommu_id for IOMMU_HWPT_INVALIDATE
iommufd/viommu: Add vdev_id helpers for IOMMU drivers
iommufd/selftest: Add mock_viommu_invalidate_user op
iommufd/selftest: Add IOMMU_TEST_OP_DEV_CHECK_CACHE test command
iommufd/selftest: Add VIOMMU coverage for IOMMU_HWPT_INVALIDATE ioctl
iommufd/viommu: Add iommufd_viommu_to_parent_domain helper
iommu/arm-smmu-v3: Add arm_smmu_cache_invalidate_user
iommu/arm-smmu-v3: Add arm_smmu_viommu_cache_invalidate
drivers/iommu/amd/iommu.c | 1 +
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 218 ++++++++++++++-
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 3 +
drivers/iommu/intel/iommu.c | 1 +
drivers/iommu/iommufd/Makefile | 5 +-
drivers/iommu/iommufd/device.c | 12 +
drivers/iommu/iommufd/hw_pagetable.c | 59 +++-
drivers/iommu/iommufd/iommufd_private.h | 37 +++
drivers/iommu/iommufd/iommufd_test.h | 30 ++
drivers/iommu/iommufd/main.c | 12 +
drivers/iommu/iommufd/selftest.c | 101 ++++++-
drivers/iommu/iommufd/viommu.c | 196 +++++++++++++
drivers/iommu/iommufd/viommu_api.c | 53 ++++
include/linux/iommu.h | 56 +++-
include/linux/iommufd.h | 51 +++-
include/uapi/linux/iommufd.h | 117 +++++++-
tools/testing/selftests/iommu/iommufd.c | 259 +++++++++++++++++-
tools/testing/selftests/iommu/iommufd_utils.h | 126 +++++++++
18 files changed, 1299 insertions(+), 38 deletions(-)
create mode 100644 drivers/iommu/iommufd/viommu.c
create mode 100644 drivers/iommu/iommufd/viommu_api.c
--
2.43.0
5 months, 2 weeks
- 7
- 148
[PATCH v2 0/5] riscv: misaligned: fix interruptible context and add tests
by Clément Léger
This series fixes misaligned access handling when in non interruptible
context by reenabling interrupts when possible. A previous commit
changed raw_copy_from_user() with copy_from_user() which enables page
faulting and thus can sleep. While correct, a warning is now triggered
due to being called in an invalid context (sleeping in
non-interruptible). This series fixes that problem by factorizing
misaligned load/store entry in a single function than reenables
interrupt if the interrupted context had interrupts enabled.
In order for misaligned handling problems to be caught sooner, add a
kselftest for all the currently supported instructions .
Note: these commits were actually part of another larger series for
misaligned request delegation but was split since it isn't directly
required.
V2:
- Use an array of struct to simplify misaligned load/store selection
- Revert use of irqentry_enter()/exit() to irqentry_nmi_enter() for
kernel space.
Clément Léger (5):
riscv: misaligned: factorize trap handling
riscv: misaligned: enable IRQs while handling misaligned accesses
riscv: misaligned: use get_user() instead of __get_user()
Documentation/sysctl: add riscv to unaligned-trap supported archs
selftests: riscv: add misaligned access testing
Documentation/admin-guide/sysctl/kernel.rst | 4 +-
arch/riscv/kernel/traps.c | 64 +++--
arch/riscv/kernel/traps_misaligned.c | 2 +-
.../selftests/riscv/misaligned/.gitignore | 1 +
.../selftests/riscv/misaligned/Makefile | 12 +
.../selftests/riscv/misaligned/common.S | 33 +++
.../testing/selftests/riscv/misaligned/fpu.S | 180 +++++++++++++
tools/testing/selftests/riscv/misaligned/gp.S | 103 +++++++
.../selftests/riscv/misaligned/misaligned.c | 254 ++++++++++++++++++
9 files changed, 623 insertions(+), 30 deletions(-)
create mode 100644 tools/testing/selftests/riscv/misaligned/.gitignore
create mode 100644 tools/testing/selftests/riscv/misaligned/Makefile
create mode 100644 tools/testing/selftests/riscv/misaligned/common.S
create mode 100644 tools/testing/selftests/riscv/misaligned/fpu.S
create mode 100644 tools/testing/selftests/riscv/misaligned/gp.S
create mode 100644 tools/testing/selftests/riscv/misaligned/misaligned.c
--
2.49.0
5 months, 2 weeks
- 3
- 10
[PATCH] selftests/bpf: Fix bpf selftest build error
by Saket Kumar Bhaskar
On linux-next, build for bpf selftest displays an error due to
mismatch in the expected function signature of bpf_testmod_test_read
and bpf_testmod_test_write.
Commit 97d06802d10a ("sysfs: constify bin_attribute argument of bin_attribute::read/write()")
changed the required type for struct bin_attribute to const struct bin_attribute.
To resolve the error, update corresponding signature for the callback.
Reported-by: Venkat Rao Bagalkote <venkat88(a)linux.ibm.com>
Closes: https://lore.kernel.org/all/e915da49-2b9a-4c4c-a34f-877f378129f6@linux.ibm.…
Signed-off-by: Saket Kumar Bhaskar <skb99(a)linux.ibm.com>
---
tools/testing/selftests/bpf/test_kmods/bpf_testmod.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/bpf/test_kmods/bpf_testmod.c b/tools/testing/selftests/bpf/test_kmods/bpf_testmod.c
index 2e54b95ad898..194c442580ee 100644
--- a/tools/testing/selftests/bpf/test_kmods/bpf_testmod.c
+++ b/tools/testing/selftests/bpf/test_kmods/bpf_testmod.c
@@ -385,7 +385,7 @@ int bpf_testmod_fentry_ok;
noinline ssize_t
bpf_testmod_test_read(struct file *file, struct kobject *kobj,
- struct bin_attribute *bin_attr,
+ const struct bin_attribute *bin_attr,
char *buf, loff_t off, size_t len)
{
struct bpf_testmod_test_read_ctx ctx = {
@@ -465,7 +465,7 @@ ALLOW_ERROR_INJECTION(bpf_testmod_test_read, ERRNO);
noinline ssize_t
bpf_testmod_test_write(struct file *file, struct kobject *kobj,
- struct bin_attribute *bin_attr,
+ const struct bin_attribute *bin_attr,
char *buf, loff_t off, size_t len)
{
struct bpf_testmod_test_write_ctx ctx = {
--
2.43.5
5 months, 2 weeks
- 4
- 5
[PATCH v18 00/15] PCI: EP: Add RC-to-EP doorbell with platform MSI controller
by Frank Li
┌────────────┐ ┌───────────────────────────────────┐ ┌────────────────┐
│ │ │ │ │ │
│ │ │ PCI Endpoint │ │ PCI Host │
│ │ │ │ │ │
│ │◄──┤ 1.platform_msi_domain_alloc_irqs()│ │ │
│ │ │ │ │ │
│ MSI ├──►│ 2.write_msi_msg() ├──►├─BAR<n> │
│ Controller │ │ update doorbell register address│ │ │
│ │ │ for BAR │ │ │
│ │ │ │ │ 3. Write BAR<n>│
│ │◄──┼───────────────────────────────────┼───┤ │
│ │ │ │ │ │
│ ├──►│ 4.Irq Handle │ │ │
│ │ │ │ │ │
│ │ │ │ │ │
└────────────┘ └───────────────────────────────────┘ └────────────────┘
This patches based on old https://lore.kernel.org/imx/20221124055036.1630573-1-Frank.Li@nxp.com/
Original patch only target to vntb driver. But actually it is common
method.
This patches add new API to pci-epf-core, so any EP driver can use it.
Previous v2 discussion here.
https://lore.kernel.org/imx/20230911220920.1817033-1-Frank.Li@nxp.com/
Changes in v18:
- pci-ep.yaml: sort property order, fix maxvalue to 0x7ffff for msi-map-mask and
iommu-map-mask
- Link to v17: https://lore.kernel.org/r/20250407-ep-msi-v17-0-633ab45a31d0@nxp.com
Changes in v17:
- move document part to pci-ep.yaml
- Link to v16: https://lore.kernel.org/r/20250404-ep-msi-v16-0-d4919d68c0d0@nxp.com
Changes in v16:
- remove arm64: dts: imx95-19x19-evk: Add PCIe1 endpoint function overlay file
because there are better patches, which under review.
- Add document for pcie-ep msi-map usage
- other change to see each patch's change log
About IMMUTABLE (No change for this part, tglx provide feedback)
> - This IMMUTABLE thing serves no purpose, because you don't randomly
> plug this end-point block on any MSI controller. They come as part
> of an SoC.
"Yes and no. The problem is that the EP implementation is meant to be a
generic library and while GIC-ITS guarantees immutability of the
address/data pair after setup, there are architectures (x86, loongson,
riscv) where the base MSI controller does not and immutability is only
achieved when interrupt remapping is enabled. The latter can be disabled
at boot-time and then the EP implementation becomes a lottery across
affinity changes.
That was my concern about this library implementation and that's why I
asked for a mechanism to ensure that the underlying irqdomain provides a
immutable address/data pair.
So it does not matter for GIC-ITS, but in the larger picture it matters.
Thanks,
tglx
"
So it does not matter for GIC-ITS, but in the larger picture it matters.
- Link to v15: https://lore.kernel.org/r/20250211-ep-msi-v15-0-bcacc1f2b1a9@nxp.com
Changes in v15:
- rebase to v6.14-rc1
- fix build issue find by kernel test robot
- Link to v14: https://lore.kernel.org/r/20250207-ep-msi-v14-0-9671b136f2b8@nxp.com
Changes in v14:
Marc Zyngier raised concerns about adding DOMAIN_BUS_DEVICE_PCI_EP_MSI. As
a result, the approach has been reverted to the v9 method. However, there
are several improvements:
MSI now supports msi-map in addition to msi-parent.
- The struct device: id is used as the endpoint function (EPF) device
identity to map to the stream ID (sideband information).
- The EPC device tree source (DTS) utilizes msi-map to provide such
information.
- The EPF device's of_node is set to the EPC controller’s node. This
approach is commonly used for multi-function device (MFD) platform child
devices, allowing them to inherit properties from the MFD device’s DTS,
such as reset-cells and gpio-cells. This method is well-suited for the
current case, as the EPF is inherently created/binded to the EPC and
should inherit the EPC’s DTS node properties.
Additionally:
Since the basic IMX95 LUT support has already been merged into the
mainline, a DTS and driver increment patch is added to complete the
solution. The patch is rebased onto the latest linux-next tree and
aligned with the new pcitest framework.
- Link to v13: https://lore.kernel.org/r/20241218-ep-msi-v13-0-646e2192dc24@nxp.com
Changes in v13:
- Change to use DOMAIN_BUS_PCI_DEVICE_EP_MSI
- Change request id as func | vfunc << 3
- Remove IRQ_DOMAIN_MSI_IMMUTABLE
Thomas Gleixner:
I hope capture all your points in review comments. If missed, let me know.
- Link to v12: https://lore.kernel.org/r/20241211-ep-msi-v12-0-33d4532fa520@nxp.com
Changes in v12:
- Change to use IRQ_DOMAIN_MSI_IMMUTABLE and add help function
irq_domain_msi_is_immuatble().
- split PCI: endpoint: pci-ep-msi: Add MSI address/data pair mutable check to 3 patches
- Link to v11: https://lore.kernel.org/r/20241209-ep-msi-v11-0-7434fa8397bd@nxp.com
Changes in v11:
- Change to use MSI_FLAG_MSG_IMMUTABLE
- Link to v10: https://lore.kernel.org/r/20241204-ep-msi-v10-0-87c378dbcd6d@nxp.com
Changes in v10:
Thomas Gleixner:
There are big change in pci-ep-msi.c. I am sure if go on the
corrent path. The key improvement is remove only 1 function devices's
limitation.
I use new patch for imutable check, which relative additional
feature compared to base enablement patch.
- Remove patch Add msi_remove_device_irq_domain() in platform_device_msi_free_irqs_all()
- Add new patch irqchip/gic-v3-its: Avoid overwriting msi_prepare callback if provided by msi_domain_info
- Remove only support 1 endpoint function limiation.
- Create one MSI domain for each endpoint function devices.
- Use "msi-map" in pci ep controler node, instead of of msi-parent. first
argument is
(func_no << 8 | vfunc_no)
- Link to v9: https://lore.kernel.org/r/20241203-ep-msi-v9-0-a60dbc3f15dd@nxp.com
Changes in v9
- Add patch platform-msi: Add msi_remove_device_irq_domain() in platform_device_msi_free_irqs_all()
- Remove patch PCI: endpoint: Add pci_epc_get_fn() API for customizable filtering
- Remove API pci_epf_align_inbound_addr_lo_hi
- Move doorbell_alloc in to doorbell_enable function.
- Link to v8: https://lore.kernel.org/r/20241116-ep-msi-v8-0-6f1f68ffd1bb@nxp.com
Changes in v8:
- update helper function name to pci_epf_align_inbound_addr()
- Link to v7: https://lore.kernel.org/r/20241114-ep-msi-v7-0-d4ac7aafbd2c@nxp.com
Changes in v7:
- Add helper function pci_epf_align_addr();
- Link to v6: https://lore.kernel.org/r/20241112-ep-msi-v6-0-45f9722e3c2a@nxp.com
Changes in v6:
- change doorbell_addr to doorbell_offset
- use round_down()
- add Niklas's test by tag
- rebase to pci/endpoint
- Link to v5: https://lore.kernel.org/r/20241108-ep-msi-v5-0-a14951c0d007@nxp.com
Changes in v5:
- Move request_irq to epf test function driver for more flexiable user case
- Add fixed size bar handler
- Some minor improvememtn to see each patches's changelog.
- Link to v4: https://lore.kernel.org/r/20241031-ep-msi-v4-0-717da2d99b28@nxp.com
Changes in v4:
- Remove patch genirq/msi: Add cleanup guard define for msi_lock_descs()/msi_unlock_descs()
- Use new method to avoid compatible problem.
Add new command DOORBELL_ENABLE and DOORBELL_DISABLE.
pcitest -B send DOORBELL_ENABLE first, EP test function driver try to
remap one of BAR_N (except test register bar) to ITS MSI MMIO space. Old
driver don't support new command, so failure return, not side effect.
After test, DOORBELL_DISABLE command send out to recover original map, so
pcitest bar test can pass as normal.
- Other detail change see each patches's change log
- Link to v3: https://lore.kernel.org/r/20241015-ep-msi-v3-0-cedc89a16c1a@nxp.com
Change from v2 to v3
- Fixed manivannan's comments
- Move common part to pci-ep-msi.c and pci-ep-msi.h
- rebase to 6.12-rc1
- use RevID to distingiush old version
mkdir /sys/kernel/config/pci_ep/functions/pci_epf_test/func1
echo 16 > /sys/kernel/config/pci_ep/functions/pci_epf_test/func1/msi_interrupts
echo 0x080c > /sys/kernel/config/pci_ep/functions/pci_epf_test/func1/deviceid
echo 0x1957 > /sys/kernel/config/pci_ep/functions/pci_epf_test/func1/vendorid
echo 1 > /sys/kernel/config/pci_ep/functions/pci_epf_test/func1/revid
^^^^^^ to enable platform msi support.
ln -s /sys/kernel/config/pci_ep/functions/pci_epf_test/func1 /sys/kernel/config/pci_ep/controllers/4c380000.pcie-ep
- use new device ID, which identify support doorbell to avoid broken
compatility.
Enable doorbell support only for PCI_DEVICE_ID_IMX8_DB, while other devices
keep the same behavior as before.
EP side RC with old driver RC with new driver
PCI_DEVICE_ID_IMX8_DB no probe doorbell enabled
Other device ID doorbell disabled* doorbell disabled*
* Behavior remains unchanged.
Change from v1 to v2
- Add missed patch for endpont/pci-epf-test.c
- Move alloc and free to epc driver from epf.
- Provide general help function for EPC driver to alloc platform msi irq.
- Fixed manivannan's comments.
Signed-off-by: Frank Li <Frank.Li(a)nxp.com>
---
Frank Li (15):
platform-msi: Add msi_remove_device_irq_domain() in platform_device_msi_free_irqs_all()
irqdomain: Add IRQ_DOMAIN_FLAG_MSI_IMMUTABLE and irq_domain_is_msi_immutable()
irqchip/gic-v3-its: Set IRQ_DOMAIN_FLAG_MSI_IMMUTABLE for ITS
dt-bindings: PCI: pci-ep: Add support for iommu-map and msi-map
irqchip/gic-v3-its: Add support for device tree msi-map and msi-mask
PCI: endpoint: Set ID and of_node for function driver
PCI: endpoint: Add RC-to-EP doorbell support using platform MSI controller
PCI: endpoint: pci-ep-msi: Add MSI address/data pair mutable check
PCI: endpoint: Add pci_epf_align_inbound_addr() helper for address alignment
PCI: endpoint: pci-epf-test: Add doorbell test support
misc: pci_endpoint_test: Add doorbell test case
selftests: pci_endpoint: Add doorbell test case
pci: imx6: Add helper function imx_pcie_add_lut_by_rid()
pci: imx6: Add LUT setting for MSI/IOMMU in Endpoint mode
arm64: dts: imx95: Add msi-map for pci-ep device
Documentation/devicetree/bindings/pci/pci-ep.yaml | 68 ++++++++++
arch/arm64/boot/dts/freescale/imx95.dtsi | 1 +
drivers/base/platform-msi.c | 1 +
drivers/irqchip/irq-gic-v3-its-msi-parent.c | 8 ++
drivers/irqchip/irq-gic-v3-its.c | 2 +-
drivers/misc/pci_endpoint_test.c | 82 ++++++++++++
drivers/pci/controller/dwc/pci-imx6.c | 25 ++--
drivers/pci/endpoint/Makefile | 1 +
drivers/pci/endpoint/functions/pci-epf-test.c | 142 +++++++++++++++++++++
drivers/pci/endpoint/pci-ep-msi.c | 90 +++++++++++++
drivers/pci/endpoint/pci-epf-core.c | 48 +++++++
include/linux/irqdomain.h | 7 +
include/linux/pci-ep-msi.h | 28 ++++
include/linux/pci-epf.h | 21 +++
include/uapi/linux/pcitest.h | 1 +
.../selftests/pci_endpoint/pci_endpoint_test.c | 28 ++++
16 files changed, 544 insertions(+), 9 deletions(-)
---
base-commit: a4949bd40778aa9beac77c89e4c6a1da52875c8b
change-id: 20241010-ep-msi-8b4cab33b1be
Best regards,
---
Frank Li <Frank.Li(a)nxp.com>
5 months, 2 weeks
- 5
- 20
[PATCH v6 0/8] ublk: decouple server threads from hctxs
by Uday Shankar
This patch set aims to allow ublk server threads to better balance load
amongst themselves by decoupling server threads from ublk queues/hctxs,
so that multiple threads can service I/Os from a single hctx.
The first patch is the functional change in the driver which switches
from per-queue daemons to per-io daemons and allows for ublk servers to
balance load that is imbalanced among queues. The second patch fixes a
bug in tag allocation (in the sbitmap layer) that was observed while
developing a test for this feature. The next five patches add support in
the selftests ublk server (kublk) for this feature, and add a test which
shows the new feature working as intended. The last patch documents the
new feature.
Signed-off-by: Uday Shankar <ushankar(a)purestorage.com>
---
Changes in v6:
- Add a feature flag for this feature, called UBLK_F_RR_TAGS (Ming Lei)
- Add test for this feature (Ming Lei)
- Add documentation for this feature (Ming Lei)
- Link to v5: https://lore.kernel.org/r/20250416-ublk_task_per_io-v5-0-9261ad7bff20@pures…
Changes in v5:
- Set io->task before ublk_mark_io_ready (Caleb Sander Mateos)
- Set io->task atomically, read it atomically when needed
- Return 0 on success from command-specific helpers in
__ublk_ch_uring_cmd (Caleb Sander Mateos)
- Rename ublk_handle_need_get_data to ublk_get_data (Caleb Sander
Mateos)
- Link to v4: https://lore.kernel.org/r/20250415-ublk_task_per_io-v4-0-54210b91a46f@pures…
Changes in v4:
- Drop "ublk: properly serialize all FETCH_REQs" since Ming is taking it
in another set
- Prevent data races by marking data structures which should be
read-only in the I/O path as const (Ming Lei)
- Link to v3: https://lore.kernel.org/r/20250410-ublk_task_per_io-v3-0-b811e8f4554a@pures…
Changes in v3:
- Check for UBLK_IO_FLAG_ACTIVE on I/O again after taking lock to ensure
that two concurrent FETCH_REQs on the same I/O can't succeed (Caleb
Sander Mateos)
- Link to v2: https://lore.kernel.org/r/20250408-ublk_task_per_io-v2-0-b97877e6fd50@pures…
Changes in v2:
- Remove changes split into other patches
- To ease error handling/synchronization, associate each I/O (instead of
each queue) to the last task that issues a FETCH_REQ against it. Only
that task is allowed to operate on the I/O.
- Link to v1: https://lore.kernel.org/r/20241002224437.3088981-1-ushankar@purestorage.com
---
Uday Shankar (8):
ublk: have a per-io daemon instead of a per-queue daemon
sbitmap: fix off-by-one when wrapping hint
selftests: ublk: kublk: plumb q_id in io_uring user_data
selftests: ublk: kublk: tie sqe allocation to io instead of queue
selftests: ublk: kublk: lift queue initialization out of thread
selftests: ublk: kublk: move per-thread data out of ublk_queue
selftests: ublk: kublk: decouple ublk_queues from ublk server threads
Documentation: ublk: document UBLK_F_RR_TAGS
Documentation/block/ublk.rst | 83 +++++-
drivers/block/ublk_drv.c | 82 ++---
include/uapi/linux/ublk_cmd.h | 8 +
lib/sbitmap.c | 4 +-
tools/testing/selftests/ublk/Makefile | 1 +
tools/testing/selftests/ublk/fault_inject.c | 4 +-
tools/testing/selftests/ublk/file_backed.c | 20 +-
tools/testing/selftests/ublk/kublk.c | 329 ++++++++++++++-------
tools/testing/selftests/ublk/kublk.h | 73 +++--
tools/testing/selftests/ublk/null.c | 12 +-
tools/testing/selftests/ublk/stripe.c | 17 +-
tools/testing/selftests/ublk/test_generic_08.sh | 61 ++++
.../selftests/ublk/trace/count_ios_per_tid.bt | 9 +
13 files changed, 488 insertions(+), 215 deletions(-)
---
base-commit: 037af793557ed192b2c10cf2379ac97abacedf55
change-id: 20250408-ublk_task_per_io-c693cf608d7a
Best regards,
--
Uday Shankar <ushankar(a)purestorage.com>
5 months, 2 weeks
- 5
- 21
Inquiry
by Philip Burchett
Greetings, Supplier.
Please give us your most recent catalog; we would want to order
from you.
I look forward to your feedback.
Philip Burchett
5 months, 2 weeks
- 1
- 0
[PATCH 0/3] KVM: arm64: selftests: arch_timer_edge_cases fixes
by Sebastian Ott
Some small fixes for arch_timer_edge_cases that I stumbled upon
while debugging failures for this selftest on ampere-one.
Sebastian Ott (3):
KVM: arm64: selftests: fix help text for arch_timer_edge_cases
KVM: arm64: selftests: fix thread migration in arch_timer_edge_cases
KVM: arm64: selftests: arch_timer_edge_cases - workaround for
AC03_CPU_14
.../selftests/kvm/arm64/arch_timer_edge_cases.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
base-commit: 9c69f88849045499e8ad114e5e13dbb3c85f4443
--
2.49.0
5 months, 2 weeks
- 2
- 4
[PATCH net v2] tests/ncdevmem: Fix double-free of queue array
by Cosmin Ratiu
netdev_bind_rx takes ownership of the queue array passed as parameter
and frees it, so a queue array buffer cannot be reused across multiple
netdev_bind_rx calls.
This commit fixes that by always passing in a newly created queue array
to all netdev_bind_rx calls in ncdevmem.
Fixes: 85585b4bc8d8 ("selftests: add ncdevmem, netcat for devmem TCP")
Signed-off-by: Cosmin Ratiu <cratiu(a)nvidia.com>
---
.../selftests/drivers/net/hw/ncdevmem.c | 55 ++++++++-----------
1 file changed, 22 insertions(+), 33 deletions(-)
diff --git a/tools/testing/selftests/drivers/net/hw/ncdevmem.c b/tools/testing/selftests/drivers/net/hw/ncdevmem.c
index 2bf14ac2b8c6..9d48004ff1a1 100644
--- a/tools/testing/selftests/drivers/net/hw/ncdevmem.c
+++ b/tools/testing/selftests/drivers/net/hw/ncdevmem.c
@@ -431,6 +431,22 @@ static int parse_address(const char *str, int port, struct sockaddr_in6 *sin6)
return 0;
}
+static struct netdev_queue_id *create_queues(void)
+{
+ struct netdev_queue_id *queues;
+ size_t i = 0;
+
+ queues = calloc(num_queues, sizeof(*queues));
+ for (i = 0; i < num_queues; i++) {
+ queues[i]._present.type = 1;
+ queues[i]._present.id = 1;
+ queues[i].type = NETDEV_QUEUE_TYPE_RX;
+ queues[i].id = start_queue + i;
+ }
+
+ return queues;
+}
+
int do_server(struct memory_buffer *mem)
{
char ctrl_data[sizeof(int) * 20000];
@@ -448,7 +464,6 @@ int do_server(struct memory_buffer *mem)
char buffer[256];
int socket_fd;
int client_fd;
- size_t i = 0;
int ret;
ret = parse_address(server_ip, atoi(port), &server_sin);
@@ -471,16 +486,7 @@ int do_server(struct memory_buffer *mem)
sleep(1);
- queues = malloc(sizeof(*queues) * num_queues);
-
- for (i = 0; i < num_queues; i++) {
- queues[i]._present.type = 1;
- queues[i]._present.id = 1;
- queues[i].type = NETDEV_QUEUE_TYPE_RX;
- queues[i].id = start_queue + i;
- }
-
- if (bind_rx_queue(ifindex, mem->fd, queues, num_queues, &ys))
+ if (bind_rx_queue(ifindex, mem->fd, create_queues(), num_queues, &ys))
error(1, 0, "Failed to bind\n");
tmp_mem = malloc(mem->size);
@@ -545,7 +551,6 @@ int do_server(struct memory_buffer *mem)
goto cleanup;
}
- i++;
for (cm = CMSG_FIRSTHDR(&msg); cm; cm = CMSG_NXTHDR(&msg, cm)) {
if (cm->cmsg_level != SOL_SOCKET ||
(cm->cmsg_type != SCM_DEVMEM_DMABUF &&
@@ -630,10 +635,8 @@ int do_server(struct memory_buffer *mem)
void run_devmem_tests(void)
{
- struct netdev_queue_id *queues;
struct memory_buffer *mem;
struct ynl_sock *ys;
- size_t i = 0;
mem = provider->alloc(getpagesize() * NUM_PAGES);
@@ -641,38 +644,24 @@ void run_devmem_tests(void)
if (configure_rss())
error(1, 0, "rss error\n");
- queues = calloc(num_queues, sizeof(*queues));
-
if (configure_headersplit(1))
error(1, 0, "Failed to configure header split\n");
- if (!bind_rx_queue(ifindex, mem->fd, queues, num_queues, &ys))
+ if (!bind_rx_queue(ifindex, mem->fd,
+ calloc(num_queues, sizeof(struct netdev_queue_id)),
+ num_queues, &ys))
error(1, 0, "Binding empty queues array should have failed\n");
- for (i = 0; i < num_queues; i++) {
- queues[i]._present.type = 1;
- queues[i]._present.id = 1;
- queues[i].type = NETDEV_QUEUE_TYPE_RX;
- queues[i].id = start_queue + i;
- }
-
if (configure_headersplit(0))
error(1, 0, "Failed to configure header split\n");
- if (!bind_rx_queue(ifindex, mem->fd, queues, num_queues, &ys))
+ if (!bind_rx_queue(ifindex, mem->fd, create_queues(), num_queues, &ys))
error(1, 0, "Configure dmabuf with header split off should have failed\n");
if (configure_headersplit(1))
error(1, 0, "Failed to configure header split\n");
- for (i = 0; i < num_queues; i++) {
- queues[i]._present.type = 1;
- queues[i]._present.id = 1;
- queues[i].type = NETDEV_QUEUE_TYPE_RX;
- queues[i].id = start_queue + i;
- }
-
- if (bind_rx_queue(ifindex, mem->fd, queues, num_queues, &ys))
+ if (bind_rx_queue(ifindex, mem->fd, create_queues(), num_queues, &ys))
error(1, 0, "Failed to bind\n");
/* Deactivating a bound queue should not be legal */
--
2.45.0
5 months, 2 weeks
- 5
- 6
[PATCH bpf-next v4 0/5] Replace CONFIG_DMABUF_SYSFS_STATS with BPF
by T.J. Mercier
Until CONFIG_DMABUF_SYSFS_STATS was added [1] it was only possible to
perform per-buffer accounting with debugfs which is not suitable for
production environments. Eventually we discovered the overhead with
per-buffer sysfs file creation/removal was significantly impacting
allocation and free times, and exacerbated kernfs lock contention. [2]
dma_buf_stats_setup() is responsible for 39% of single-page buffer
creation duration, or 74% of single-page dma_buf_export() duration when
stressing dmabuf allocations and frees.
I prototyped a change from per-buffer to per-exporter statistics with a
RCU protected list of exporter allocations that accommodates most (but
not all) of our use-cases and avoids almost all of the sysfs overhead.
While that adds less overhead than per-buffer sysfs, and less even than
the maintenance of the dmabuf debugfs_list, it's still *additional*
overhead on top of the debugfs_list and doesn't give us per-buffer info.
This series uses the existing dmabuf debugfs_list to implement a BPF
dmabuf iterator, which adds no overhead to buffer allocation/free and
provides per-buffer info. The list has been moved outside of
CONFIG_DEBUG_FS scope so that it is always populated. The BPF program
loaded by userspace that extracts per-buffer information gets to define
its own interface which avoids the lack of ABI stability with debugfs.
This will allow us to replace our use of CONFIG_DMABUF_SYSFS_STATS, and
the plan is to remove it from the kernel after the next longterm stable
release.
[1] https://lore.kernel.org/linux-media/20201210044400.1080308-1-hridya@google.…
[2] https://lore.kernel.org/all/20220516171315.2400578-1-tjmercier@google.com
v1: https://lore.kernel.org/all/20250414225227.3642618-1-tjmercier@google.com
v1 -> v2:
Make the DMA buffer list independent of CONFIG_DEBUG_FS per Christian König
Add CONFIG_DMA_SHARED_BUFFER check to kernel/bpf/Makefile per kernel test robot
Use BTF_ID_LIST_SINGLE instead of BTF_ID_LIST_GLOBAL_SINGLE per Song Liu
Fixup comment style, mixing code/declarations, and use ASSERT_OK_FD in selftest per Song Liu
Add BPF_ITER_RESCHED feature to bpf_dmabuf_reg_info per Alexei Starovoitov
Add open-coded iterator and selftest per Alexei Starovoitov
Add a second test buffer from the system dmabuf heap to selftests
Use the BPF program we'll use in production for selftest per Alexei Starovoitov
https://r.android.com/c/platform/system/bpfprogs/+/3616123/2/dmabufIter.c
https://r.android.com/c/platform/system/memory/libmeminfo/+/3614259/1/libdm…
v2: https://lore.kernel.org/all/20250504224149.1033867-1-tjmercier@google.com
v2 -> v3:
Rebase onto bpf-next/master
Move get_next_dmabuf() into drivers/dma-buf/dma-buf.c, along with the
new get_first_dmabuf(). This avoids having to expose the dmabuf list
and mutex to the rest of the kernel, and keeps the dmabuf mutex
operations near each other in the same file. (Christian König)
Add Christian's RB to dma-buf: Rename debugfs symbols
Drop RFC: dma-buf: Remove DMA-BUF statistics
v3: https://lore.kernel.org/all/20250507001036.2278781-1-tjmercier@google.com
v3 -> v4:
Fix selftest BPF program comment style (not kdoc) per Alexei Starovoitov
Fix dma-buf.c kdoc comment style per Alexei Starovoitov
Rename get_first_dmabuf / get_next_dmabuf to dma_buf_iter_begin /
dma_buf_iter_next per Christian König
Add Christian's RB to bpf: Add dmabuf iterator
T.J. Mercier (5):
dma-buf: Rename debugfs symbols
bpf: Add dmabuf iterator
bpf: Add open coded dmabuf iterator
selftests/bpf: Add test for dmabuf_iter
selftests/bpf: Add test for open coded dmabuf_iter
drivers/dma-buf/dma-buf.c | 98 +++++--
include/linux/dma-buf.h | 4 +-
kernel/bpf/Makefile | 3 +
kernel/bpf/dmabuf_iter.c | 149 ++++++++++
kernel/bpf/helpers.c | 5 +
.../testing/selftests/bpf/bpf_experimental.h | 5 +
tools/testing/selftests/bpf/config | 3 +
.../selftests/bpf/prog_tests/dmabuf_iter.c | 258 ++++++++++++++++++
.../testing/selftests/bpf/progs/dmabuf_iter.c | 91 ++++++
9 files changed, 594 insertions(+), 22 deletions(-)
create mode 100644 kernel/bpf/dmabuf_iter.c
create mode 100644 tools/testing/selftests/bpf/prog_tests/dmabuf_iter.c
create mode 100644 tools/testing/selftests/bpf/progs/dmabuf_iter.c
base-commit: 43745d11bfd9683abdf08ad7a5cc403d6a9ffd15
--
2.49.0.1015.ga840276032-goog
5 months, 2 weeks
- 3
- 19
[PATCH v8 iproute2-next 0/1] DUALPI2 iproute2 patch
by chia-yu.chang＠nokia-bell-labs.com
From: Chia-Yu Chang <chia-yu.chang(a)nokia-bell-labs.com>
Hello,
Please find DUALPI2 iproute2 patch v8.
v8 (09-May-25)
- Update pkt_sched.h with the one in nex-next
- Fix one typo of comment in pkt_sched.h (ALOK TIWARI <alok.a.tiwari(a)oracle.com>)
- Update manual content in man/man8/tc-dualpi2.8 (ALOK TIWARI <alok.a.tiwari(a)oracle.com>)
- Update tc/q_dualpi2.c to fix missing blank lines and add missing case (ALOK TIWARI <alok.a.tiwari(a)oracle.com>)
v7 (05-May-25)
- Align pkt_sched.h with the v14 version of net-next due to spec modificiaotn in tc.yaml
- Reorganize dualpi2_print_opt() to match the order in tc.yaml
- Remove credit-queue in PRINT_JSON
v6 (26-Apr-25)
- Update JSON file output due to spec modifiocation in tc.yaml of net-next
v5 (25-Mar-25)
- Use matches() to replace current strcmp() (Stephen Hemminger <stephen(a)networkplumber.org>)
- Use general parse_percent() for handling scaled percentage values (Stephen Hemminger <stephen(a)networkplumber.org>)
- Add print function for JSON of dualpi2 stats (Stephen Hemminger <stephen(a)networkplumber.org>)
v4 (16-Mar-25)
- Add min_qlen_step to dualpi2 attribute as the minimum queue length in number of packets in the L-queue to start step amrking.
v3 (21-Feb-25)
- Add memlimit to dualpi2 attribute, and add memory_used, max_memory_used, memory_limit in dualpi2 stats (Dave Taht <dave.taht(a)gmail.com>)
- Update manual to align latest implementation and clarify the queue naming and default unit
- Use common "get_scaled_alpha_beta" and clean print_opt for Dualpi2
v2 (23-Oct-24)
- Rename get_float in dualpi2 to get_float_min_max in utils.c
- Move get_float from iplink_can.c in utils.c (Stephen Hemminger <stephen(a)networkplumber.org>)
- Add print function for JSON of dualpi2 (Stephen Hemminger <stephen(a)networkplumber.org>)
For more details of DualPI2, plesae refer IETF RFC9332
(https://datatracker.ietf.org/doc/html/rfc9332).
Best Regards,
Chia-Yu
Chia-Yu Chang (1):
tc: add dualpi2 scheduler module
bash-completion/tc | 11 +-
include/uapi/linux/pkt_sched.h | 68 +++++
include/utils.h | 2 +
ip/iplink_can.c | 14 -
lib/utils.c | 30 ++
man/man8/tc-dualpi2.8 | 249 +++++++++++++++
tc/Makefile | 1 +
tc/q_dualpi2.c | 534 +++++++++++++++++++++++++++++++++
8 files changed, 894 insertions(+), 15 deletions(-)
create mode 100644 man/man8/tc-dualpi2.8
create mode 100644 tc/q_dualpi2.c
--
2.34.1
5 months, 2 weeks
- 1
- 1
[PATCH] kunit: configs: Enable coverage of the bitfield packing library
by Mark Brown
There are KUnit tests for the bitfield packing library but these depend
on CONFIG_PACKING which is not enabled by anything in either the
existing KUnit all_tests.config or the base UML config it runs on as
standard. Enable that in all_tests.config to improve coverage.
Signed-off-by: Mark Brown <broonie(a)kernel.org>
---
tools/testing/kunit/configs/all_tests.config | 2 ++
1 file changed, 2 insertions(+)
diff --git a/tools/testing/kunit/configs/all_tests.config b/tools/testing/kunit/configs/all_tests.config
index cdd9782f9646..b0223b7aebde 100644
--- a/tools/testing/kunit/configs/all_tests.config
+++ b/tools/testing/kunit/configs/all_tests.config
@@ -51,3 +51,5 @@ CONFIG_SOUND=y
CONFIG_SND=y
CONFIG_SND_SOC=y
CONFIG_SND_SOC_TOPOLOGY_BUILD=y
+
+CONFIG_PACKING=y
---
base-commit: 8ffd015db85fea3e15a77027fda6c02ced4d2444
change-id: 20250422-kunit-enable-missing-tests-9189ee930cae
Best regards,
--
Mark Brown <broonie(a)kernel.org>
5 months, 2 weeks
- 2
- 1
[PATCH] selftests/seccomp: fix negative_ENOSYS tracer tests on arm32
by Terry Tritton
TRACE_syscall.ptrace.negative_ENOSYS and TRACE_syscall.seccomp.negative_ENOSYS
on arm32 are being reported as failures instead of skipping.
The teardown_trace_fixture function sets the test to KSFT_FAIL in case of a
non 0 return value from the tracer process.
Due to _metadata now being shared between the forked processes the tracer is
returning the KSFT_SKIP value set by the tracee which is non 0.
Remove the setting of the _metadata.exit_code in teardown_trace_fixture.
Fixes: 24cf65a62266 ("selftests/harness: Share _metadata between forked processes")
Signed-off-by: Terry Tritton <terry.tritton(a)linaro.org>
---
tools/testing/selftests/seccomp/seccomp_bpf.c | 6 ------
1 file changed, 6 deletions(-)
diff --git a/tools/testing/selftests/seccomp/seccomp_bpf.c b/tools/testing/selftests/seccomp/seccomp_bpf.c
index b2f76a52215a..c43a6f8f8cd5 100644
--- a/tools/testing/selftests/seccomp/seccomp_bpf.c
+++ b/tools/testing/selftests/seccomp/seccomp_bpf.c
@@ -1629,14 +1629,8 @@ void teardown_trace_fixture(struct __test_metadata *_metadata,
{
if (tracer) {
int status;
- /*
- * Extract the exit code from the other process and
- * adopt it for ourselves in case its asserts failed.
- */
ASSERT_EQ(0, kill(tracer, SIGUSR1));
ASSERT_EQ(tracer, waitpid(tracer, &status, 0));
- if (WEXITSTATUS(status))
- _metadata->exit_code = KSFT_FAIL;
}
}
--
2.39.5
5 months, 2 weeks
- 2
- 1
[PATCH 0/3] selftests/timens: Various small fixes
by Thomas Weißschuh
Fixes for various issues in the timens selftests.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh(a)linutronix.de>
---
Thomas Weißschuh (3):
selftests/timens: Print TAP headers
selftests/timens: Make run_tests() functions static
selftests/timens: timerfd: Use correct clockid type in tclock_gettime()
tools/testing/selftests/timens/clock_nanosleep.c | 4 +++-
tools/testing/selftests/timens/exec.c | 2 ++
tools/testing/selftests/timens/futex.c | 2 ++
tools/testing/selftests/timens/gettime_perf.c | 2 ++
tools/testing/selftests/timens/procfs.c | 2 ++
tools/testing/selftests/timens/timens.c | 2 ++
tools/testing/selftests/timens/timer.c | 4 +++-
tools/testing/selftests/timens/timerfd.c | 6 ++++--
tools/testing/selftests/timens/vfork_exec.c | 2 ++
9 files changed, 22 insertions(+), 4 deletions(-)
---
base-commit: 0af2f6be1b4281385b618cb86ad946eded089ac8
change-id: 20250326-selftests-timens-fixes-97662bdb18b6
Best regards,
--
Thomas Weißschuh <thomas.weissschuh(a)linutronix.de>
5 months, 2 weeks
- 4
- 10
[PATCH] KVM: SEV: Disable SEV-SNP support on initialization failure
by Ashish Kalra
From: Ashish Kalra <ashish.kalra(a)amd.com>
During platform init, SNP initialization may fail for several reasons,
such as firmware command failures and incompatible versions. However,
the KVM capability may continue to advertise support for it.
The platform may have SNP enabled but if SNP_INIT fails then SNP is
not supported by KVM.
During KVM module initialization query the SNP platform status to obtain
the SNP initialization state and use it as an additional condition to
determine support for SEV-SNP.
Co-developed-by: Sean Christopherson <seanjc(a)google.com>
Signed-off-by: Sean Christopherson <seanjc(a)google.com>
Co-developed-by: Pratik R. Sampat <prsampat(a)amd.com>
Signed-off-by: Pratik R. Sampat <prsampat(a)amd.com>
Signed-off-by: Ashish Kalra <ashish.kalra(a)amd.com>
---
arch/x86/kvm/svm/sev.c | 43 +++++++++++++++++++++++++++++++++---------
1 file changed, 34 insertions(+), 9 deletions(-)
diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c
index ada53f04158c..a6abdb26f877 100644
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -2934,6 +2934,32 @@ void __init sev_set_cpu_caps(void)
}
}
+static bool sev_is_snp_initialized(void)
+{
+ struct sev_user_data_snp_status *status;
+ struct sev_data_snp_addr buf;
+ bool initialized = false;
+ void *data;
+ int error;
+
+ data = snp_alloc_firmware_page(GFP_KERNEL_ACCOUNT | __GFP_ZERO);
+ if (!data)
+ return initialized;
+
+ buf.address = __psp_pa(data);
+ if (sev_do_cmd(SEV_CMD_SNP_PLATFORM_STATUS, &buf, &error))
+ goto out;
+
+ status = (struct sev_user_data_snp_status *)data;
+ if (status->state)
+ initialized = true;
+
+out:
+ snp_free_firmware_page(data);
+
+ return initialized;
+}
+
void __init sev_hardware_setup(void)
{
unsigned int eax, ebx, ecx, edx, sev_asid_count, sev_es_asid_count;
@@ -3038,6 +3064,14 @@ void __init sev_hardware_setup(void)
sev_snp_supported = sev_snp_enabled && cc_platform_has(CC_ATTR_HOST_SEV_SNP);
out:
+ if (sev_enabled) {
+ init_args.probe = true;
+ if (sev_platform_init(&init_args))
+ sev_supported = sev_es_supported = sev_snp_supported = false;
+ else
+ sev_snp_supported &= sev_is_snp_initialized();
+ }
+
if (boot_cpu_has(X86_FEATURE_SEV))
pr_info("SEV %s (ASIDs %u - %u)\n",
sev_supported ? min_sev_asid <= max_sev_asid ? "enabled" :
@@ -3064,15 +3098,6 @@ void __init sev_hardware_setup(void)
sev_supported_vmsa_features = 0;
if (sev_es_debug_swap_enabled)
sev_supported_vmsa_features |= SVM_SEV_FEAT_DEBUG_SWAP;
-
- if (!sev_enabled)
- return;
-
- /*
- * Do both SNP and SEV initialization at KVM module load.
- */
- init_args.probe = true;
- sev_platform_init(&init_args);
}
void sev_hardware_unsetup(void)
--
2.34.1
5 months, 2 weeks
- 4
- 4
[PATCH v2] selftests/ftrace: Convert poll to a gen_file
by Ayush Jain
Poll program is a helper to ftracetest, thus make it a
generic file and remove it from being run as a test.
Currently when executing tests using
$ make run_tests
CC poll
TAP version 13
1..2
# timeout set to 0
# selftests: ftrace: poll
# Error: Polling file is not specified
not ok 1 selftests: ftrace: poll # exit=255
Fix this by using TEST_GEN_FILES to build the 'poll' binary as a helper
rather than as a test.
Fixes: 80c3e28528ff ("selftests/tracing: Add hist poll() support test")
Signed-off-by: Ayush Jain <Ayush.jain3(a)amd.com>
---
tools/testing/selftests/ftrace/Makefile | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/testing/selftests/ftrace/Makefile b/tools/testing/selftests/ftrace/Makefile
index 49d96bb16355..7c12263f8260 100644
--- a/tools/testing/selftests/ftrace/Makefile
+++ b/tools/testing/selftests/ftrace/Makefile
@@ -6,6 +6,6 @@ TEST_PROGS := ftracetest-ktap
TEST_FILES := test.d settings
EXTRA_CLEAN := $(OUTPUT)/logs/*
-TEST_GEN_PROGS = poll
+TEST_GEN_FILES := poll
include ../lib.mk
--
2.34.1
5 months, 2 weeks
- 3
- 3
[PATCH] selftests/bpf: Fix bpf selftest build warning
by Saket Kumar Bhaskar
On linux-next, build for bpf selftest displays a warning:
Warning: Kernel ABI header at 'tools/include/uapi/linux/if_xdp.h'
differs from latest version at 'include/uapi/linux/if_xdp.h'.
Commit 8066e388be48 ("net: add UAPI to the header guard in various network headers")
changed the header guard from _LINUX_IF_XDP_H to _UAPI_LINUX_IF_XDP_H
in include/uapi/linux/if_xdp.h.
To resolve the warning, update tools/include/uapi/linux/if_xdp.h
to align with the changes in include/uapi/linux/if_xdp.h
Reported-by: Venkat Rao Bagalkote <venkat88(a)linux.ibm.com>
Closes: https://lore.kernel.org/all/c2bc466d-dff2-4d0d-a797-9af7f676c065@linux.ibm.…
Signed-off-by: Saket Kumar Bhaskar <skb99(a)linux.ibm.com>
---
tools/include/uapi/linux/if_xdp.h | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/tools/include/uapi/linux/if_xdp.h b/tools/include/uapi/linux/if_xdp.h
index 42869770776e..44f2bb93e7e6 100644
--- a/tools/include/uapi/linux/if_xdp.h
+++ b/tools/include/uapi/linux/if_xdp.h
@@ -7,8 +7,8 @@
* Magnus Karlsson <magnus.karlsson(a)intel.com>
*/
-#ifndef _LINUX_IF_XDP_H
-#define _LINUX_IF_XDP_H
+#ifndef _UAPI_LINUX_IF_XDP_H
+#define _UAPI_LINUX_IF_XDP_H
#include <linux/types.h>
@@ -180,4 +180,4 @@ struct xdp_desc {
/* TX packet carries valid metadata. */
#define XDP_TX_METADATA (1 << 1)
-#endif /* _LINUX_IF_XDP_H */
+#endif /* _UAPI_LINUX_IF_XDP_H */
--
2.43.5
5 months, 2 weeks
- 2
- 1
[PATCH v3 00/23] iommufd: Add vIOMMU infrastructure (Part-4 vQUEUE)
by Nicolin Chen
The vIOMMU object is designed to represent a slice of an IOMMU HW for its
virtualization features shared with or passed to user space (a VM mostly)
in a way of HW acceleration. This extended the HWPT-based design for more
advanced virtualization feature.
A vQUEUE introduced by this series as a part of the vIOMMU infrastructure
represents a HW accelerated queue/buffer for VM to use exclusively, e.g.
- NVIDIA's Virtual Command Queue
- AMD vIOMMU's Command Buffer, Event Log Buffer, and PPR Log Buffer
each of which is an IOMMU HW feature to directly access the virtual queue
in the guest address space, to avoid VM Exits to improve the performance.
As an initial use case, it adds support for guest-owned HW virtual queues
that VMM can allocate per request from a guest OS writing the VM register.
Introduce IOMMUFD_OBJ_VQUEUE and its allocator IOMMUFD_CMD_VQUEUE_ALLOC,
allowing VMM to forward the IOMMU-specific queue info, such as queue base
address, size, and etc.
Meanwhile, a guest-owned virtual queue needs the kernel (a virtual queue
driver) to control the queue by reading/writing its consumer and producer
indexes, which means the virtual queue HW allows the guest kernel to get
a direct R/W access to those registers. Introduce an mmap infrastructure
to the iommufd core so as to support pass through a piece of MMIO region
from the host physical address space to the guest physical address space.
The VMA info (vm_pgoff/size) used by an mmap must be pre-allocated during
the IOMMUFD_CMD_VQUEUE_ALLOC and returned to the user space as an output
driver-data carried via the IOMMUFD_CMD_VQUEUE_ALLOC. So, this requires a
driver-specific user data support in the vIOMMU allocation flow.
As a real-world use case, this series implements a vQUEUE support to the
tegra241-cmdqv driver for VCMDQs on NVIDIA Grace CPU. In another word, it
is also the Tegra CMDQV series Part-2 (user-space support), reworked from
Previous RFCv1:
https://lore.kernel.org/all/cover.1712978212.git.nicolinc@nvidia.com/
This enables the HW accelerated feature for NVIDIA Grace CPU. Compared to
the standard SMMUv3 operating in the nested translation mode trapping CMDQ
for TLBI and ATC_INV commands, this gives a huge performance improvement:
70% to 90% reductions of invalidation time were measured by various DMA
unmap tests running in a guest OS.
// Unmap latencies from "dma_map_benchmark -g @granule -t @threads",
// by toggling "/sys/kernel/debug/iommu/tegra241_cmdqv/bypass_vcmdq"
@granule | @threads | bypass_vcmdq=1 | bypass_vcmdq=0
4KB 1 35.7 us 5.3 us
16KB 1 41.8 us 6.8 us
64KB 1 68.9 us 9.9 us
128KB 1 109.0 us 12.6 us
256KB 1 187.1 us 18.0 us
4KB 2 96.9 us 6.8 us
16KB 2 97.8 us 7.5 us
64KB 2 151.5 us 10.7 us
128KB 2 257.8 us 12.7 us
256KB 2 443.0 us 17.9 us
This is on Github:
https://github.com/nicolinc/iommufd/commits/iommufd_vqueue-v3
Paring QEMU branch for testing:
https://github.com/nicolinc/qemu/commits/wip/for_iommufd_vqueue-v3
Changelog
v3
* Add Reviewed-by from Baolu, Pranjal, and Alok
* Revise kdocs, uAPI docs, and commit logs
* Rename "vCMDQ" back to "vQUEUE" for AMD cases
* [tegra] Add tegra241_vcmdq_hw_flush_timeout()
* [tegra] Rename vsmmu_alloc to alloc_vintf_user
* [tegra] Use writel for SID replacement registers
* [tegra] Move mmap removal call to vsmmu_destroy op
* [tegra] Fix revert in tegra241_vintf_alloc_lvcmdq_user()
* [iommufd] Replace "& ~PAGE_MASK" with PAGE_ALIGNED()
* [iommufd] Add an object-type "owner" to immap structure
* [iommufd] Drop the ictx input in the new for-driver APIs
* [iommufd] Add iommufd_vma_ops to keep track of mmap lifecycle
* [iommufd] Add viommu-based iommufd_viommu_alloc/destroy_mmap helpers
* [iommufd] Rename iommufd_ctx_alloc/free_mmap to
_iommufd_alloc/destroy_mmap
v2
https://lore.kernel.org/all/cover.1745646960.git.nicolinc@nvidia.com/
* Add Reviewed-by from Jason
* [smmu] Fix vsmmu initial value
* [smmu] Support impl for hw_info
* [tegra] Rename "slot" to "vsid"
* [tegra] Update kdocs and commit logs
* [tegra] Map/unmap LVCMDQ dynamically
* [tegra] Refcount the previous LVCMDQ
* [tegra] Return -EEXIST if LVCMDQ exists
* [tegra] Simplify VINTF cleanup routine
* [tegra] Use vmid and s2_domain in vsmmu
* [tegra] Rename "mmap_pgoff" to "immap_id"
* [tegra] Add more addr and length validation
* [iommufd] Add more narrative to mmap's kdoc
* [iommufd] Add iommufd_struct_depend/undepend()
* [iommufd] Rename vcmdq_free op to vcmdq_destroy
* [iommufd] Fix bug in iommu_copy_struct_to_user()
* [iommufd] Drop is_io from iommufd_ctx_alloc_mmap()
* [iommufd] Test the queue memory for its contiguity
* [iommufd] Return -ENXIO if address or length fails
* [iommufd] Do not change @min_last in mock_viommu_alloc()
* [iommufd] Generalize TEGRA241_VCMDQ data in core structure
* [iommufd] Add selftest coverage for IOMMUFD_CMD_VCMDQ_ALLOC
* [iommufd] Add iopt_pin_pages() to prevent queue memory from unmapping
v1
https://lore.kernel.org/all/cover.1744353300.git.nicolinc@nvidia.com/
Thanks
Nicolin
Nicolin Chen (23):
iommufd/viommu: Add driver-allocated vDEVICE support
iommu: Pass in a driver-level user data structure to viommu_alloc op
iommufd/viommu: Allow driver-specific user data for a vIOMMU object
iommu: Add iommu_copy_struct_to_user helper
iommufd/driver: Let iommufd_viommu_alloc helper save ictx to
viommu->ictx
iommufd/driver: Add iommufd_struct_destroy to revert
iommufd_viommu_alloc
iommufd/selftest: Support user_data in mock_viommu_alloc
iommufd/selftest: Add covearge for viommu data
iommufd: Abstract iopt_pin_pages and iopt_unpin_pages helpers
iommufd/viommu: Introduce IOMMUFD_OBJ_VQUEUE and its related struct
iommufd/viommu: Add IOMMUFD_CMD_VQUEUE_ALLOC ioctl
iommufd/driver: Add iommufd_vqueue_depend/undepend() helpers
iommufd/selftest: Add coverage for IOMMUFD_CMD_VQUEUE_ALLOC
iommufd: Add mmap interface
iommufd/selftest: Add coverage for the new mmap interface
Documentation: userspace-api: iommufd: Update vQUEUE
iommu/arm-smmu-v3-iommufd: Add vsmmu_alloc impl op
iommu/arm-smmu-v3-iommufd: Support implementation-defined hw_info
iommu/tegra241-cmdqv: Use request_threaded_irq
iommu/tegra241-cmdqv: Simplify deinit flow in
tegra241_cmdqv_remove_vintf()
iommu/tegra241-cmdqv: Do not statically map LVCMDQs
iommu/tegra241-cmdqv: Add user-space use support
iommu/tegra241-cmdqv: Add IOMMU_VEVENTQ_TYPE_TEGRA241_CMDQV support
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 25 +-
drivers/iommu/iommufd/io_pagetable.h | 8 +
drivers/iommu/iommufd/iommufd_private.h | 28 +-
drivers/iommu/iommufd/iommufd_test.h | 20 +
include/linux/iommu.h | 43 +-
include/linux/iommufd.h | 184 ++++++-
include/uapi/linux/iommufd.h | 117 ++++-
tools/testing/selftests/iommu/iommufd_utils.h | 52 +-
.../arm/arm-smmu-v3/arm-smmu-v3-iommufd.c | 42 +-
.../iommu/arm/arm-smmu-v3/tegra241-cmdqv.c | 481 +++++++++++++++++-
drivers/iommu/iommufd/device.c | 117 +----
drivers/iommu/iommufd/driver.c | 88 ++++
drivers/iommu/iommufd/io_pagetable.c | 95 ++++
drivers/iommu/iommufd/main.c | 84 ++-
drivers/iommu/iommufd/selftest.c | 126 ++++-
drivers/iommu/iommufd/viommu.c | 116 ++++-
tools/testing/selftests/iommu/iommufd.c | 96 +++-
.../selftests/iommu/iommufd_fail_nth.c | 11 +-
Documentation/userspace-api/iommufd.rst | 15 +
19 files changed, 1555 insertions(+), 193 deletions(-)
--
2.43.0
5 months, 2 weeks
- 5
- 40
[PATCH v1] selftests/mm: add simple VM_PFNMAP tests based on mmap'ing /dev/mem
by David Hildenbrand
Let's test some basic functionality using /dev/mem. These tests will
implicitly cover some PAT (Page Attribute Handling) handling on x86.
These tests will only run when /dev/mem access to the first two pages
in physical address space is possible and allowed; otherwise, the tests
are skipped.
On current x86-64 with PAT inside a VM, all tests pass:
TAP version 13
1..19
ok 1 madvise(MADV_DONTNEED) should be disallowed
ok 2 madvise(MADV_DONTNEED_LOCKED) should be disallowed
ok 3 madvise(MADV_FREE) should be disallowed
ok 4 madvise(MADV_WIPEONFORK) should be disallowed
ok 5 madvise(MADV_COLD) should be disallowed
ok 6 madvise(MADV_PAGEOUT) should be disallowed
ok 7 madvise(MADV_POPULATE_READ) should be disallowed
ok 8 madvise(MADV_POPULATE_WRITE) should be disallowed
ok 9 munmap() splitting
ok 10 mmap() after splitting
ok 11 mremap(MREMAP_FIXED)
ok 12 mremap() shrinking
ok 13 mremap() growing should be disallowed
ok 14 mprotect(PROT_NONE)
ok 15 SIGSEGV expected
ok 16 mprotect(PROT_READ)
ok 17 SIGSEGV not expected
ok 18 fork()
ok 19 SIGSEGV in child not expected
# Totals: pass:19 fail:0 xfail:0 xpass:0 skip:0 error:0
However, we are able to trigger:
[ 27.888251] x86/PAT: pfnmap:1790 freeing invalid memtype [mem 0x00000000-0x00000fff]
There are probably more things worth testing in the future, such as
MAP_PRIVATE handling. But this set of tests is sufficient to cover most of
the things we will rework regarding PAT handling.
Cc: Andrew Morton <akpm(a)linux-foundation.org>
Cc: Shuah Khan <shuah(a)kernel.org>
Cc: Lorenzo Stoakes <lorenzo.stoakes(a)oracle.com>
Cc: Ingo Molnar <mingo(a)redhat.com>
Cc: Peter Xu <peterx(a)redhat.com>
Signed-off-by: David Hildenbrand <david(a)redhat.com>
---
On current mm-unstable, the MADV_POPULATE_READ test fails because
mm-unstable contains a patch [1] that must be dropped.
[1] https://lore.kernel.org/all/20250507154105.763088-2-p.antoniou@partner.sams…
---
tools/testing/selftests/mm/Makefile | 1 +
tools/testing/selftests/mm/pfnmap.c | 278 ++++++++++++++++++++++++++++
2 files changed, 279 insertions(+)
create mode 100644 tools/testing/selftests/mm/pfnmap.c
diff --git a/tools/testing/selftests/mm/Makefile b/tools/testing/selftests/mm/Makefile
index ad4d6043a60f0..ae6f994d3add7 100644
--- a/tools/testing/selftests/mm/Makefile
+++ b/tools/testing/selftests/mm/Makefile
@@ -84,6 +84,7 @@ TEST_GEN_FILES += mremap_test
TEST_GEN_FILES += mseal_test
TEST_GEN_FILES += on-fault-limit
TEST_GEN_FILES += pagemap_ioctl
+TEST_GEN_FILES += pfnmap
TEST_GEN_FILES += thuge-gen
TEST_GEN_FILES += transhuge-stress
TEST_GEN_FILES += uffd-stress
diff --git a/tools/testing/selftests/mm/pfnmap.c b/tools/testing/selftests/mm/pfnmap.c
new file mode 100644
index 0000000000000..59be2f3221124
--- /dev/null
+++ b/tools/testing/selftests/mm/pfnmap.c
@@ -0,0 +1,278 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Basic VM_PFNMAP tests relying on mmap() of '/dev/mem'
+ *
+ * Copyright 2025, Red Hat, Inc.
+ *
+ * Author(s): David Hildenbrand <david(a)redhat.com>
+ */
+#define _GNU_SOURCE
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <setjmp.h>
+#include <linux/mman.h>
+#include <sys/mman.h>
+#include <sys/wait.h>
+
+#include "../kselftest.h"
+#include "vm_util.h"
+
+static size_t pagesize;
+static int pagemap_fd;
+static int dev_mem_fd;
+static sigjmp_buf env;
+
+static void signal_handler(int sig)
+{
+ if (sig == SIGSEGV)
+ siglongjmp(env, 1);
+ siglongjmp(env, 2);
+}
+
+static void sense_support(void)
+{
+ char *addr, tmp;
+ int ret;
+
+ dev_mem_fd = open("/dev/mem", O_RDONLY);
+ if (dev_mem_fd < 0)
+ ksft_exit_skip("Cannot open '/dev/mem': %s\n", strerror(errno));
+
+ /* We'll require the first two pages throughout our tests ... */
+ addr = mmap(0, pagesize * 2, PROT_READ, MAP_SHARED, dev_mem_fd, 0);
+ if (addr == MAP_FAILED)
+ ksft_exit_skip("Cannot mmap '/dev/mem'");
+
+ /* ... and want to be able to read from them. */
+ ret = sigsetjmp(env, 1);
+ if (!ret) {
+ tmp = *addr + *(addr + pagesize);
+ asm volatile("" : "+r" (tmp));
+ }
+ if (ret)
+ ksft_exit_skip("Cannot read-access mmap'ed '/dev/mem'");
+
+ munmap(addr, pagesize * 2);
+}
+
+static void test_madvise(void)
+{
+#define INIT_ADVICE(nr) { nr, #nr}
+ const struct {
+ int nr;
+ const char *name;
+ } advices[] = {
+ INIT_ADVICE(MADV_DONTNEED),
+ INIT_ADVICE(MADV_DONTNEED_LOCKED),
+ INIT_ADVICE(MADV_FREE),
+ INIT_ADVICE(MADV_WIPEONFORK),
+ INIT_ADVICE(MADV_COLD),
+ INIT_ADVICE(MADV_PAGEOUT),
+ INIT_ADVICE(MADV_POPULATE_READ),
+ INIT_ADVICE(MADV_POPULATE_WRITE),
+ };
+ char *addr;
+ int ret, i;
+
+ addr = mmap(0, pagesize, PROT_READ, MAP_SHARED, dev_mem_fd, 0);
+ if (addr == MAP_FAILED)
+ ksft_exit_fail_msg("mmap() failed: %s\n", strerror(errno));
+
+ /* All these advices must be rejected. */
+ for (i = 0; i < ARRAY_SIZE(advices); i++) {
+ ret = madvise(addr, pagesize, advices[i].nr);
+ ksft_test_result(ret && errno == EINVAL,
+ "madvise(%s) should be disallowed\n",
+ advices[i].name);
+ }
+
+ munmap(addr, pagesize);
+}
+
+static void test_munmap_splitting(void)
+{
+ char *addr1, *addr2;
+ int ret;
+
+ addr1 = mmap(0, pagesize * 2, PROT_READ, MAP_SHARED, dev_mem_fd, 0);
+ if (addr1 == MAP_FAILED)
+ ksft_exit_fail_msg("mmap() failed: %s\n", strerror(errno));
+
+ /* Unmap the first pages. */
+ ret = munmap(addr1, pagesize);
+ ksft_test_result(!ret, "munmap() splitting\n");
+
+ /* Remap the first page while the second page is still mapped. */
+ addr2 = mmap(0, pagesize, PROT_READ, MAP_SHARED, dev_mem_fd, 0);
+ ksft_test_result(addr2 != MAP_FAILED, "mmap() after splitting\n");
+
+ if (addr2 != MAP_FAILED)
+ munmap(addr2, pagesize);
+ if (!ret)
+ munmap(addr1 + pagesize, pagesize);
+ else
+ munmap(addr1, pagesize * 2);
+}
+
+static void test_mremap_fixed(void)
+{
+ char *addr, *new_addr, *ret;
+
+ addr = mmap(0, pagesize * 2, PROT_READ, MAP_SHARED, dev_mem_fd, 0);
+ if (addr == MAP_FAILED)
+ ksft_exit_fail_msg("mmap() failed: %s\n", strerror(errno));
+
+ /* Reserve a destination area. */
+ new_addr = mmap(0, pagesize * 2, PROT_READ, MAP_ANON | MAP_PRIVATE, -1, 0);
+ if (new_addr == MAP_FAILED)
+ ksft_exit_fail_msg("mmap() failed: %s\n", strerror(errno));
+
+ /* mremap() over our destination. */
+ ret = mremap(addr, pagesize * 2, pagesize * 2,
+ MREMAP_FIXED | MREMAP_MAYMOVE, new_addr);
+ ksft_test_result(ret == new_addr, "mremap(MREMAP_FIXED)\n");
+ if (ret != new_addr)
+ munmap(new_addr, pagesize * 2);
+ munmap(addr, pagesize * 2);
+}
+
+static void test_mremap_shrinking(void)
+{
+ char *addr, *ret;
+
+ addr = mmap(0, pagesize * 2, PROT_READ, MAP_SHARED, dev_mem_fd, 0);
+ if (addr == MAP_FAILED)
+ ksft_exit_fail_msg("mmap() failed: %s\n", strerror(errno));
+
+ /* Shrinking is expected to work. */
+ ret = mremap(addr, pagesize * 2, pagesize, 0);
+ ksft_test_result(ret == addr, "mremap() shrinking\n");
+ if (ret != addr)
+ munmap(addr, pagesize * 2);
+ else
+ munmap(addr, pagesize);
+}
+
+static void test_mremap_growing(void)
+{
+ char *addr, *ret;
+
+ addr = mmap(0, pagesize, PROT_READ, MAP_SHARED, dev_mem_fd, 0);
+ if (addr == MAP_FAILED)
+ ksft_exit_fail_msg("mmap() failed: %s\n", strerror(errno));
+
+ /* Growing is not expected to work. */
+ ret = mremap(addr, pagesize, pagesize * 2, MREMAP_MAYMOVE);
+ ksft_test_result(ret == MAP_FAILED,
+ "mremap() growing should be disallowed\n");
+ if (ret == MAP_FAILED)
+ munmap(addr, pagesize);
+ else
+ munmap(ret, pagesize * 2);
+}
+
+static void test_mprotect(void)
+{
+ char *addr, tmp;
+ int ret;
+
+ addr = mmap(0, pagesize, PROT_READ, MAP_SHARED, dev_mem_fd, 0);
+ if (addr == MAP_FAILED)
+ ksft_exit_fail_msg("mmap() failed: %s\n", strerror(errno));
+
+ /* With PROT_NONE, read access must result in SIGSEGV. */
+ ret = mprotect(addr, pagesize, PROT_NONE);
+ ksft_test_result(!ret, "mprotect(PROT_NONE)\n");
+
+ ret = sigsetjmp(env, 1);
+ if (!ret) {
+ tmp = *addr;
+ asm volatile("" : "+r" (tmp));
+ }
+ ksft_test_result(ret == 1, "SIGSEGV expected\n");
+
+ /* With PROT_READ, read access must again succeed. */
+ ret = mprotect(addr, pagesize, PROT_READ);
+ ksft_test_result(!ret, "mprotect(PROT_READ)\n");
+
+ ret = sigsetjmp(env, 1);
+ if (!ret) {
+ tmp = *addr;
+ asm volatile("" : "+r" (tmp));
+ }
+ ksft_test_result(!ret, "SIGSEGV not expected\n");
+
+ munmap(addr, pagesize);
+}
+
+static void test_fork(void)
+{
+ char *addr, tmp;
+ int ret;
+
+ addr = mmap(0, pagesize, PROT_READ, MAP_SHARED, dev_mem_fd, 0);
+ if (addr == MAP_FAILED)
+ ksft_exit_fail_msg("mmap() failed: %s\n", strerror(errno));
+
+ /* fork() a child and test if the child can access the page. */
+ ret = fork();
+ if (ret < 0) {
+ ksft_test_result_fail("fork()\n");
+ goto out;
+ } else if (!ret) {
+ ret = sigsetjmp(env, 1);
+ if (!ret) {
+ tmp = *addr;
+ asm volatile("" : "+r" (tmp));
+ }
+ /* Return the result to the parent. */
+ exit(ret);
+ }
+ ksft_test_result_pass("fork()\n");
+
+ /* Wait for our child and obtain the result. */
+ wait(&ret);
+ if (WIFEXITED(ret))
+ ret = WEXITSTATUS(ret);
+ else
+ ret = -EINVAL;
+
+ ksft_test_result(!ret, "SIGSEGV in child not expected\n");
+out:
+ munmap(addr, pagesize);
+}
+
+int main(int argc, char **argv)
+{
+ int err;
+
+ ksft_print_header();
+ ksft_set_plan(19);
+
+ pagesize = getpagesize();
+ pagemap_fd = open("/proc/self/pagemap", O_RDONLY);
+ if (pagemap_fd < 0)
+ ksft_exit_fail_msg("opening pagemap failed\n");
+ if (signal(SIGSEGV, signal_handler) == SIG_ERR)
+ ksft_exit_fail_msg("signal() failed: %s\n", strerror(errno));
+
+ sense_support();
+ test_madvise();
+ test_munmap_splitting();
+ test_mremap_fixed();
+ test_mremap_shrinking();
+ test_mremap_growing();
+ test_mprotect();
+ test_fork();
+
+ err = ksft_get_fail_cnt();
+ if (err)
+ ksft_exit_fail_msg("%d out of %d tests failed\n",
+ err, ksft_test_num());
+ ksft_exit_pass();
+}
--
2.49.0
5 months, 2 weeks
- 3
- 6
[PATCH bpf-next v3 0/3] Allow mmap of /sys/kernel/btf/vmlinux
by Lorenz Bauer
I'd like to cut down the memory usage of parsing vmlinux BTF in ebpf-go.
With some upcoming changes the library is sitting at 5MiB for a parse.
Most of that memory is simply copying the BTF blob into user space.
By allowing vmlinux BTF to be mmapped read-only into user space I can
cut memory usage by about 75%.
Signed-off-by: Lorenz Bauer <lmb(a)isovalent.com>
---
Changes in v3:
- Remove slightly confusing calculation of trailing (Alexei)
- Use vm_insert_page (Alexei)
- Simplified libbpf code
- Link to v2: https://lore.kernel.org/r/20250502-vmlinux-mmap-v2-0-95c271434519@isovalent…
Changes in v2:
- Use btf__new in selftest
- Avoid vm_iomap_memory in btf_vmlinux_mmap
- Add VM_DONTDUMP
- Add support to libbpf
- Link to v1: https://lore.kernel.org/r/20250501-vmlinux-mmap-v1-0-aa2724572598@isovalent…
---
Lorenz Bauer (3):
btf: allow mmap of vmlinux btf
selftests: bpf: add a test for mmapable vmlinux BTF
libbpf: Use mmap to parse vmlinux BTF from sysfs
include/asm-generic/vmlinux.lds.h | 3 +-
kernel/bpf/sysfs_btf.c | 37 ++++++++++
tools/lib/bpf/btf.c | 83 +++++++++++++++++++---
tools/testing/selftests/bpf/prog_tests/btf_sysfs.c | 83 ++++++++++++++++++++++
4 files changed, 194 insertions(+), 12 deletions(-)
---
base-commit: 38d976c32d85ef12dcd2b8a231196f7049548477
change-id: 20250501-vmlinux-mmap-2ec5563c3ef1
Best regards,
--
Lorenz Bauer <lmb(a)isovalent.com>
5 months, 2 weeks
- 3
- 10
[PATCH net-next] selftests: net-drv: remove the nic_performance and nic_link_layer tests
by Jakub Kicinski
Revert fbbf93556f0c ("selftests: nic_performance: Add selftest for performance of NIC driver")
Revert c087dc54394b ("selftests: nic_link_layer: Add selftest case for speed and duplex states")
Revert 6116075e18f7 ("selftests: nic_link_layer: Add link layer selftest for NIC driver")
These tests don't clean up after themselves, don't use the disruptive
annotations, don't get included in make install etc. etc. The tests
were added before we have any "HW" runner, so the issues were missed.
Our CI doesn't have any way of excluding broken tests, remove these
for now to stop the random pollution of results due to broken env.
We can always add them back once / if fixed.
Signed-off-by: Jakub Kicinski <kuba(a)kernel.org>
---
CC: shuah(a)kernel.org
CC: willemb(a)google.com
CC: sdf(a)fomichev.me
CC: mohan.prasad(a)microchip.com
CC: dw(a)davidwei.uk
CC: petrm(a)nvidia.com
CC: linux-kselftest(a)vger.kernel.org
---
.../testing/selftests/drivers/net/hw/Makefile | 2 -
.../drivers/net/hw/lib/py/__init__.py | 1 -
.../drivers/net/hw/lib/py/linkconfig.py | 222 ------------------
.../drivers/net/hw/nic_link_layer.py | 113 ---------
.../drivers/net/hw/nic_performance.py | 137 -----------
.../selftests/drivers/net/lib/py/load.py | 20 +-
6 files changed, 1 insertion(+), 494 deletions(-)
delete mode 100644 tools/testing/selftests/drivers/net/hw/lib/py/linkconfig.py
delete mode 100644 tools/testing/selftests/drivers/net/hw/nic_link_layer.py
delete mode 100644 tools/testing/selftests/drivers/net/hw/nic_performance.py
diff --git a/tools/testing/selftests/drivers/net/hw/Makefile b/tools/testing/selftests/drivers/net/hw/Makefile
index 5447785c286e..df2c047ffa90 100644
--- a/tools/testing/selftests/drivers/net/hw/Makefile
+++ b/tools/testing/selftests/drivers/net/hw/Makefile
@@ -15,8 +15,6 @@ TEST_PROGS = \
iou-zcrx.py \
irq.py \
loopback.sh \
- nic_link_layer.py \
- nic_performance.py \
pp_alloc_fail.py \
rss_ctx.py \
rss_input_xfrm.py \
diff --git a/tools/testing/selftests/drivers/net/hw/lib/py/__init__.py b/tools/testing/selftests/drivers/net/hw/lib/py/__init__.py
index 399789a9676a..b582885786f5 100644
--- a/tools/testing/selftests/drivers/net/hw/lib/py/__init__.py
+++ b/tools/testing/selftests/drivers/net/hw/lib/py/__init__.py
@@ -9,7 +9,6 @@ KSFT_DIR = (Path(__file__).parent / "../../../../..").resolve()
sys.path.append(KSFT_DIR.as_posix())
from net.lib.py import *
from drivers.net.lib.py import *
- from .linkconfig import LinkConfig
except ModuleNotFoundError as e:
ksft_pr("Failed importing `net` library from kernel sources")
ksft_pr(str(e))
diff --git a/tools/testing/selftests/drivers/net/hw/lib/py/linkconfig.py b/tools/testing/selftests/drivers/net/hw/lib/py/linkconfig.py
deleted file mode 100644
index 79fde603cbbc..000000000000
--- a/tools/testing/selftests/drivers/net/hw/lib/py/linkconfig.py
+++ /dev/null
@@ -1,222 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-
-from lib.py import cmd, ethtool, ip
-from lib.py import ksft_pr, ksft_eq, KsftSkipEx
-from typing import Optional
-import re
-import time
-import json
-
-#The LinkConfig class is implemented to handle the link layer configurations.
-#Required minimum ethtool version is 6.10
-
-class LinkConfig:
- """Class for handling the link layer configurations"""
- def __init__(self, cfg: object) -> None:
- self.cfg = cfg
- self.partner_netif = self.get_partner_netif_name()
-
- """Get the initial link configuration of local interface"""
- self.common_link_modes = self.get_common_link_modes()
-
- def get_partner_netif_name(self) -> Optional[str]:
- partner_netif = None
- try:
- if not self.verify_link_up():
- return None
- """Get partner interface name"""
- partner_json_output = ip("addr show", json=True, host=self.cfg.remote)
- for interface in partner_json_output:
- for addr in interface.get('addr_info', []):
- if addr.get('local') == self.cfg.remote_addr:
- partner_netif = interface['ifname']
- ksft_pr(f"Partner Interface name: {partner_netif}")
- if partner_netif is None:
- ksft_pr("Unable to get the partner interface name")
- except Exception as e:
- print(f"Unexpected error occurred while getting partner interface name: {e}")
- self.partner_netif = partner_netif
- return partner_netif
-
- def verify_link_up(self) -> bool:
- """Verify whether the local interface link is up"""
- with open(f"/sys/class/net/{self.cfg.ifname}/operstate", "r") as fp:
- link_state = fp.read().strip()
-
- if link_state == "down":
- ksft_pr(f"Link state of interface {self.cfg.ifname} is DOWN")
- return False
- else:
- return True
-
- def reset_interface(self, local: bool = True, remote: bool = True) -> bool:
- ksft_pr("Resetting interfaces in local and remote")
- if remote:
- if self.verify_link_up():
- if self.partner_netif is not None:
- ifname = self.partner_netif
- link_up_cmd = f"ip link set up {ifname}"
- link_down_cmd = f"ip link set down {ifname}"
- reset_cmd = f"{link_down_cmd} && sleep 5 && {link_up_cmd}"
- try:
- cmd(reset_cmd, host=self.cfg.remote)
- except Exception as e:
- ksft_pr(f"Unexpected error occurred while resetting remote: {e}")
- else:
- ksft_pr("Partner interface not available")
- if local:
- ifname = self.cfg.ifname
- link_up_cmd = f"ip link set up {ifname}"
- link_down_cmd = f"ip link set down {ifname}"
- reset_cmd = f"{link_down_cmd} && sleep 5 && {link_up_cmd}"
- try:
- cmd(reset_cmd)
- except Exception as e:
- ksft_pr(f"Unexpected error occurred while resetting local: {e}")
- time.sleep(10)
- if self.verify_link_up() and self.get_ethtool_field("link-detected"):
- ksft_pr("Local and remote interfaces reset to original state")
- return True
- else:
- ksft_pr("Error occurred after resetting interfaces. Link is DOWN.")
- return False
-
- def set_speed_and_duplex(self, speed: str, duplex: str, autoneg: bool = True) -> bool:
- """Set the speed and duplex state for the interface"""
- autoneg_state = "on" if autoneg is True else "off"
- process = None
- try:
- process = ethtool(f"--change {self.cfg.ifname} speed {speed} duplex {duplex} autoneg {autoneg_state}")
- except Exception as e:
- ksft_pr(f"Unexpected error occurred while setting speed/duplex: {e}")
- if process is None or process.ret != 0:
- return False
- else:
- ksft_pr(f"Speed: {speed} Mbps, Duplex: {duplex} set for Interface: {self.cfg.ifname}")
- return True
-
- def verify_speed_and_duplex(self, expected_speed: str, expected_duplex: str) -> bool:
- if not self.verify_link_up():
- return False
- """Verifying the speed and duplex state for the interface"""
- with open(f"/sys/class/net/{self.cfg.ifname}/speed", "r") as fp:
- actual_speed = fp.read().strip()
- with open(f"/sys/class/net/{self.cfg.ifname}/duplex", "r") as fp:
- actual_duplex = fp.read().strip()
-
- ksft_eq(actual_speed, expected_speed)
- ksft_eq(actual_duplex, expected_duplex)
- return True
-
- def set_autonegotiation_state(self, state: str, remote: bool = False) -> bool:
- common_link_modes = self.common_link_modes
- speeds, duplex_modes = self.get_speed_duplex_values(self.common_link_modes)
- speed = speeds[0]
- duplex = duplex_modes[0]
- if not speed or not duplex:
- ksft_pr("No speed or duplex modes found")
- return False
-
- speed_duplex_cmd = f"speed {speed} duplex {duplex}" if state == "off" else ""
- if remote:
- if not self.verify_link_up():
- return False
- """Set the autonegotiation state for the partner"""
- command = f"-s {self.partner_netif} {speed_duplex_cmd} autoneg {state}"
- partner_autoneg_change = None
- """Set autonegotiation state for interface in remote pc"""
- try:
- partner_autoneg_change = ethtool(command, host=self.cfg.remote)
- except Exception as e:
- ksft_pr(f"Unexpected error occurred while changing auto-neg in remote: {e}")
- if partner_autoneg_change is None or partner_autoneg_change.ret != 0:
- ksft_pr(f"Not able to set autoneg parameter for interface {self.partner_netif}.")
- return False
- ksft_pr(f"Autoneg set as {state} for {self.partner_netif}")
- else:
- """Set the autonegotiation state for the interface"""
- try:
- process = ethtool(f"-s {self.cfg.ifname} {speed_duplex_cmd} autoneg {state}")
- if process.ret != 0:
- ksft_pr(f"Not able to set autoneg parameter for interface {self.cfg.ifname}")
- return False
- except Exception as e:
- ksft_pr(f"Unexpected error occurred while changing auto-neg in local: {e}")
- return False
- ksft_pr(f"Autoneg set as {state} for {self.cfg.ifname}")
- return True
-
- def check_autoneg_supported(self, remote: bool = False) -> bool:
- if not remote:
- local_autoneg = self.get_ethtool_field("supports-auto-negotiation")
- if local_autoneg is None:
- ksft_pr(f"Unable to fetch auto-negotiation status for interface {self.cfg.ifname}")
- """Return autoneg status of the local interface"""
- return local_autoneg
- else:
- if not self.verify_link_up():
- raise KsftSkipEx("Link is DOWN")
- """Check remote auto-negotiation support status"""
- partner_autoneg = False
- if self.partner_netif is not None:
- partner_autoneg = self.get_ethtool_field("supports-auto-negotiation", remote=True)
- if partner_autoneg is None:
- ksft_pr(f"Unable to fetch auto-negotiation status for interface {self.partner_netif}")
- return partner_autoneg
-
- def get_common_link_modes(self) -> set[str]:
- common_link_modes = []
- """Populate common link modes"""
- link_modes = self.get_ethtool_field("supported-link-modes")
- partner_link_modes = self.get_ethtool_field("link-partner-advertised-link-modes")
- if link_modes is None:
- raise KsftSkipEx(f"Link modes not available for {self.cfg.ifname}")
- if partner_link_modes is None:
- raise KsftSkipEx(f"Partner link modes not available for {self.cfg.ifname}")
- common_link_modes = set(link_modes) and set(partner_link_modes)
- return common_link_modes
-
- def get_speed_duplex_values(self, link_modes: list[str]) -> tuple[list[str], list[str]]:
- speed = []
- duplex = []
- """Check the link modes"""
- for data in link_modes:
- parts = data.split('/')
- speed_value = re.match(r'\d+', parts[0])
- if speed_value:
- speed.append(speed_value.group())
- else:
- ksft_pr(f"No speed value found for interface {self.ifname}")
- return None, None
- duplex.append(parts[1].lower())
- return speed, duplex
-
- def get_ethtool_field(self, field: str, remote: bool = False) -> Optional[str]:
- process = None
- if not remote:
- """Get the ethtool field value for the local interface"""
- try:
- process = ethtool(self.cfg.ifname, json=True)
- except Exception as e:
- ksft_pr("Required minimum ethtool version is 6.10")
- ksft_pr(f"Unexpected error occurred while getting ethtool field in local: {e}")
- return None
- else:
- if not self.verify_link_up():
- return None
- """Get the ethtool field value for the remote interface"""
- self.cfg.require_cmd("ethtool", remote=True)
- if self.partner_netif is None:
- ksft_pr(f"Partner interface name is unavailable.")
- return None
- try:
- process = ethtool(self.partner_netif, json=True, host=self.cfg.remote)
- except Exception as e:
- ksft_pr("Required minimum ethtool version is 6.10")
- ksft_pr(f"Unexpected error occurred while getting ethtool field in remote: {e}")
- return None
- json_data = process[0]
- """Check if the field exist in the json data"""
- if field not in json_data:
- raise KsftSkipEx(f'Field {field} does not exist in the output of interface {json_data["ifname"]}')
- return json_data[field]
diff --git a/tools/testing/selftests/drivers/net/hw/nic_link_layer.py b/tools/testing/selftests/drivers/net/hw/nic_link_layer.py
deleted file mode 100644
index efd921180532..000000000000
--- a/tools/testing/selftests/drivers/net/hw/nic_link_layer.py
+++ /dev/null
@@ -1,113 +0,0 @@
-#!/usr/bin/env python3
-# SPDX-License-Identifier: GPL-2.0
-
-#Introduction:
-#This file has basic link layer tests for generic NIC drivers.
-#The test comprises of auto-negotiation, speed and duplex checks.
-#
-#Setup:
-#Connect the DUT PC with NIC card to partner pc back via ethernet medium of your choice(RJ45, T1)
-#
-# DUT PC Partner PC
-#┌───────────────────────┐ ┌──────────────────────────┐
-#│ │ │ │
-#│ │ │ │
-#│ ┌───────────┐ │ │
-#│ │DUT NIC │ Eth │ │
-#│ │Interface ─┼─────────────────────────┼─ any eth Interface │
-#│ └───────────┘ │ │
-#│ │ │ │
-#│ │ │ │
-#└───────────────────────┘ └──────────────────────────┘
-#
-#Configurations:
-#Required minimum ethtool version is 6.10 (supports json)
-#Default values:
-#time_delay = 8 #time taken to wait for transitions to happen, in seconds.
-
-import time
-import argparse
-from lib.py import ksft_run, ksft_exit, ksft_pr, ksft_eq
-from lib.py import KsftFailEx, KsftSkipEx
-from lib.py import NetDrvEpEnv
-from lib.py import LinkConfig
-
-def _pre_test_checks(cfg: object, link_config: LinkConfig) -> None:
- if link_config.partner_netif is None:
- KsftSkipEx("Partner interface is not available")
- if not link_config.check_autoneg_supported() or not link_config.check_autoneg_supported(remote=True):
- KsftSkipEx(f"Auto-negotiation not supported for interface {cfg.ifname} or {link_config.partner_netif}")
- if not link_config.verify_link_up():
- raise KsftSkipEx(f"Link state of interface {cfg.ifname} is DOWN")
-
-def verify_autonegotiation(cfg: object, expected_state: str, link_config: LinkConfig) -> None:
- if not link_config.verify_link_up():
- raise KsftSkipEx(f"Link state of interface {cfg.ifname} is DOWN")
- """Verifying the autonegotiation state in partner"""
- partner_autoneg_output = link_config.get_ethtool_field("auto-negotiation", remote=True)
- if partner_autoneg_output is None:
- KsftSkipEx(f"Auto-negotiation state not available for interface {link_config.partner_netif}")
- partner_autoneg_state = "on" if partner_autoneg_output is True else "off"
-
- ksft_eq(partner_autoneg_state, expected_state)
-
- """Verifying the autonegotiation state of local"""
- autoneg_output = link_config.get_ethtool_field("auto-negotiation")
- if autoneg_output is None:
- KsftSkipEx(f"Auto-negotiation state not available for interface {cfg.ifname}")
- actual_state = "on" if autoneg_output is True else "off"
-
- ksft_eq(actual_state, expected_state)
-
- """Verifying the link establishment"""
- link_available = link_config.get_ethtool_field("link-detected")
- if link_available is None:
- KsftSkipEx(f"Link status not available for interface {cfg.ifname}")
- if link_available != True:
- raise KsftSkipEx("Link not established at interface {cfg.ifname} after changing auto-negotiation")
-
-def test_autonegotiation(cfg: object, link_config: LinkConfig, time_delay: int) -> None:
- _pre_test_checks(cfg, link_config)
- for state in ["off", "on"]:
- if not link_config.set_autonegotiation_state(state, remote=True):
- raise KsftSkipEx(f"Unable to set auto-negotiation state for interface {link_config.partner_netif}")
- if not link_config.set_autonegotiation_state(state):
- raise KsftSkipEx(f"Unable to set auto-negotiation state for interface {cfg.ifname}")
- time.sleep(time_delay)
- verify_autonegotiation(cfg, state, link_config)
-
-def test_network_speed(cfg: object, link_config: LinkConfig, time_delay: int) -> None:
- _pre_test_checks(cfg, link_config)
- common_link_modes = link_config.common_link_modes
- if not common_link_modes:
- KsftSkipEx("No common link modes exist")
- speeds, duplex_modes = link_config.get_speed_duplex_values(common_link_modes)
-
- if speeds and duplex_modes and len(speeds) == len(duplex_modes):
- for idx in range(len(speeds)):
- speed = speeds[idx]
- duplex = duplex_modes[idx]
- if not link_config.set_speed_and_duplex(speed, duplex):
- raise KsftFailEx(f"Unable to set speed and duplex parameters for {cfg.ifname}")
- time.sleep(time_delay)
- if not link_config.verify_speed_and_duplex(speed, duplex):
- raise KsftSkipEx(f"Error occurred while verifying speed and duplex states for interface {cfg.ifname}")
- else:
- if not speeds or not duplex_modes:
- KsftSkipEx(f"No supported speeds or duplex modes found for interface {cfg.ifname}")
- else:
- KsftSkipEx("Mismatch in the number of speeds and duplex modes")
-
-def main() -> None:
- parser = argparse.ArgumentParser(description="Run basic link layer tests for NIC driver")
- parser.add_argument('--time-delay', type=int, default=8, help='Time taken to wait for transitions to happen(in seconds). Default is 8 seconds.')
- args = parser.parse_args()
- time_delay = args.time_delay
- with NetDrvEpEnv(__file__, nsim_test=False) as cfg:
- link_config = LinkConfig(cfg)
- ksft_run(globs=globals(), case_pfx={"test_"}, args=(cfg, link_config, time_delay,))
- link_config.reset_interface()
- ksft_exit()
-
-if __name__ == "__main__":
- main()
diff --git a/tools/testing/selftests/drivers/net/hw/nic_performance.py b/tools/testing/selftests/drivers/net/hw/nic_performance.py
deleted file mode 100644
index 201403b76ea3..000000000000
--- a/tools/testing/selftests/drivers/net/hw/nic_performance.py
+++ /dev/null
@@ -1,137 +0,0 @@
-#!/usr/bin/env python3
-# SPDX-License-Identifier: GPL-2.0
-
-#Introduction:
-#This file has basic performance test for generic NIC drivers.
-#The test comprises of throughput check for TCP and UDP streams.
-#
-#Setup:
-#Connect the DUT PC with NIC card to partner pc back via ethernet medium of your choice(RJ45, T1)
-#
-# DUT PC Partner PC
-#┌───────────────────────┐ ┌──────────────────────────┐
-#│ │ │ │
-#│ │ │ │
-#│ ┌───────────┐ │ │
-#│ │DUT NIC │ Eth │ │
-#│ │Interface ─┼─────────────────────────┼─ any eth Interface │
-#│ └───────────┘ │ │
-#│ │ │ │
-#│ │ │ │
-#└───────────────────────┘ └──────────────────────────┘
-#
-#Configurations:
-#To prevent interruptions, Add ethtool, ip to the sudoers list in remote PC and get the ssh key from remote.
-#Required minimum ethtool version is 6.10
-#Change the below configuration based on your hw needs.
-# """Default values"""
-#time_delay = 8 #time taken to wait for transitions to happen, in seconds.
-#test_duration = 10 #performance test duration for the throughput check, in seconds.
-#send_throughput_threshold = 80 #percentage of send throughput required to pass the check
-#receive_throughput_threshold = 50 #percentage of receive throughput required to pass the check
-
-import time
-import json
-import argparse
-from lib.py import ksft_run, ksft_exit, ksft_pr, ksft_true
-from lib.py import KsftFailEx, KsftSkipEx, GenerateTraffic
-from lib.py import NetDrvEpEnv, bkg, wait_port_listen
-from lib.py import cmd
-from lib.py import LinkConfig
-
-class TestConfig:
- def __init__(self, time_delay: int, test_duration: int, send_throughput_threshold: int, receive_throughput_threshold: int) -> None:
- self.time_delay = time_delay
- self.test_duration = test_duration
- self.send_throughput_threshold = send_throughput_threshold
- self.receive_throughput_threshold = receive_throughput_threshold
-
-def _pre_test_checks(cfg: object, link_config: LinkConfig) -> None:
- if not link_config.verify_link_up():
- KsftSkipEx(f"Link state of interface {cfg.ifname} is DOWN")
- common_link_modes = link_config.common_link_modes
- if common_link_modes is None:
- KsftSkipEx("No common link modes found")
- if link_config.partner_netif == None:
- KsftSkipEx("Partner interface is not available")
- if link_config.check_autoneg_supported():
- KsftSkipEx("Auto-negotiation not supported by local")
- if link_config.check_autoneg_supported(remote=True):
- KsftSkipEx("Auto-negotiation not supported by remote")
- cfg.require_cmd("iperf3", remote=True)
-
-def check_throughput(cfg: object, link_config: LinkConfig, test_config: TestConfig, protocol: str, traffic: GenerateTraffic) -> None:
- common_link_modes = link_config.common_link_modes
- speeds, duplex_modes = link_config.get_speed_duplex_values(common_link_modes)
- """Test duration in seconds"""
- duration = test_config.test_duration
-
- ksft_pr(f"{protocol} test")
- test_type = "-u" if protocol == "UDP" else ""
-
- send_throughput = []
- receive_throughput = []
- for idx in range(0, len(speeds)):
- if link_config.set_speed_and_duplex(speeds[idx], duplex_modes[idx]) == False:
- raise KsftFailEx(f"Not able to set speed and duplex parameters for {cfg.ifname}")
- time.sleep(test_config.time_delay)
- if not link_config.verify_link_up():
- raise KsftSkipEx(f"Link state of interface {cfg.ifname} is DOWN")
-
- send_command=f"{test_type} -b 0 -t {duration} --json"
- receive_command=f"{test_type} -b 0 -t {duration} --reverse --json"
-
- send_result = traffic.run_remote_test(cfg, command=send_command)
- if send_result.ret != 0:
- raise KsftSkipEx("Error occurred during data transmit: {send_result.stdout}")
-
- send_output = send_result.stdout
- send_data = json.loads(send_output)
-
- """Convert throughput to Mbps"""
- send_throughput.append(round(send_data['end']['sum_sent']['bits_per_second'] / 1e6, 2))
- ksft_pr(f"{protocol}: Send throughput: {send_throughput[idx]} Mbps")
-
- receive_result = traffic.run_remote_test(cfg, command=receive_command)
- if receive_result.ret != 0:
- raise KsftSkipEx("Error occurred during data receive: {receive_result.stdout}")
-
- receive_output = receive_result.stdout
- receive_data = json.loads(receive_output)
-
- """Convert throughput to Mbps"""
- receive_throughput.append(round(receive_data['end']['sum_received']['bits_per_second'] / 1e6, 2))
- ksft_pr(f"{protocol}: Receive throughput: {receive_throughput[idx]} Mbps")
-
- """Check whether throughput is not below the threshold (default values set at start)"""
- for idx in range(0, len(speeds)):
- send_threshold = float(speeds[idx]) * float(test_config.send_throughput_threshold / 100)
- receive_threshold = float(speeds[idx]) * float(test_config.receive_throughput_threshold / 100)
- ksft_true(send_throughput[idx] >= send_threshold, f"{protocol}: Send throughput is below threshold for {speeds[idx]} Mbps in {duplex_modes[idx]} duplex")
- ksft_true(receive_throughput[idx] >= receive_threshold, f"{protocol}: Receive throughput is below threshold for {speeds[idx]} Mbps in {duplex_modes[idx]} duplex")
-
-def test_tcp_throughput(cfg: object, link_config: LinkConfig, test_config: TestConfig, traffic: GenerateTraffic) -> None:
- _pre_test_checks(cfg, link_config)
- check_throughput(cfg, link_config, test_config, 'TCP', traffic)
-
-def test_udp_throughput(cfg: object, link_config: LinkConfig, test_config: TestConfig, traffic: GenerateTraffic) -> None:
- _pre_test_checks(cfg, link_config)
- check_throughput(cfg, link_config, test_config, 'UDP', traffic)
-
-def main() -> None:
- parser = argparse.ArgumentParser(description="Run basic performance test for NIC driver")
- parser.add_argument('--time-delay', type=int, default=8, help='Time taken to wait for transitions to happen(in seconds). Default is 8 seconds.')
- parser.add_argument('--test-duration', type=int, default=10, help='Performance test duration for the throughput check, in seconds. Default is 10 seconds.')
- parser.add_argument('--stt', type=int, default=80, help='Send throughput Threshold: Percentage of send throughput upon actual throughput required to pass the throughput check (in percentage). Default is 80.')
- parser.add_argument('--rtt', type=int, default=50, help='Receive throughput Threshold: Percentage of receive throughput upon actual throughput required to pass the throughput check (in percentage). Default is 50.')
- args=parser.parse_args()
- test_config = TestConfig(args.time_delay, args.test_duration, args.stt, args.rtt)
- with NetDrvEpEnv(__file__, nsim_test=False) as cfg:
- traffic = GenerateTraffic(cfg)
- link_config = LinkConfig(cfg)
- ksft_run(globs=globals(), case_pfx={"test_"}, args=(cfg, link_config, test_config, traffic, ))
- link_config.reset_interface()
- ksft_exit()
-
-if __name__ == "__main__":
- main()
diff --git a/tools/testing/selftests/drivers/net/lib/py/load.py b/tools/testing/selftests/drivers/net/lib/py/load.py
index da5af2c680fa..d9c10613ae67 100644
--- a/tools/testing/selftests/drivers/net/lib/py/load.py
+++ b/tools/testing/selftests/drivers/net/lib/py/load.py
@@ -2,7 +2,7 @@
import time
-from lib.py import ksft_pr, cmd, ip, rand_port, wait_port_listen, bkg
+from lib.py import ksft_pr, cmd, ip, rand_port, wait_port_listen
class GenerateTraffic:
def __init__(self, env, port=None):
@@ -23,24 +23,6 @@ from lib.py import ksft_pr, cmd, ip, rand_port, wait_port_listen, bkg
self.stop(verbose=True)
raise Exception("iperf3 traffic did not ramp up")
- def run_remote_test(self, env: object, port=None, command=None):
- if port is None:
- port = rand_port()
- try:
- server_cmd = f"iperf3 -s 1 -p {port} --one-off"
- with bkg(server_cmd, host=env.remote):
- #iperf3 opens TCP connection as default in server
- #-u to be specified in client command for UDP
- wait_port_listen(port, host=env.remote)
- except Exception as e:
- raise Exception(f"Unexpected error occurred while running server command: {e}")
- try:
- client_cmd = f"iperf3 -c {env.remote_addr} -p {port} {command}"
- proc = cmd(client_cmd)
- return proc
- except Exception as e:
- raise Exception(f"Unexpected error occurred while running client command: {e}")
-
def _wait_pkts(self, pkt_cnt=None, pps=None):
"""
Wait until we've seen pkt_cnt or until traffic ramps up to pps.
--
2.49.0
5 months, 2 weeks
- 4
- 3
KUnit for Userspace
by Weber (US), Matthew L
Greetings,
We're looking to start doing test development for portions of kernel code "standalone" mocked out and would like to do it in userspace. Are there any existing patch sets we could review or help extend to define this concept? We have checked out David Gow's LPC talk [1] from last year that did point out a few patch series that hinted at userspace kunit.
Regards,
Matt
[1] https://lpc.events/event/18/contributions/1790/attachments/1400/3007/LPC202…
5 months, 2 weeks
- 1
- 0
[PATCH v2 00/22] iommufd: Add vIOMMU infrastructure (Part-4 vCMDQ)
by Nicolin Chen
The vIOMMU object is designed to represent a slice of an IOMMU HW for its
virtualization features shared with or passed to user space (a VM mostly)
in a way of HW acceleration. This extended the HWPT-based design for more
advanced virtualization feature.
A vCMDQ introduced by this series as a part of the vIOMMU infrastructure
represents a HW supported queue/buffer for VM to use exclusively, e.g.
- NVIDIA's virtual command queue
- AMD vIOMMU's command buffer
either of which is an IOMMU HW feature to directly load and execute cache
invalidation commands issued by a guest kernel, to shoot down TLB entries
that HW cached for guest-owned stage-1 page table entries. This is a big
improvement since there is no VM Exit during an invalidation, compared to
the traditional invalidation pathway by trapping a guest-own invalidation
queue and forwarding those commands/requests to the host kernel that will
eventually fill a HW-owned queue to execute those commands.
Thus, a vCMDQ object, as an initial use case, is all about a guest-owned
HW command queue that VMM can allocate/configure depending on the request
from a guest kernel. Introduce a new IOMMUFD_OBJ_VCMDQ and its allocator
IOMMUFD_CMD_VCMDQ_ALLOC allowing VMM to forward the IOMMU-specific queue
info, such as queue base address, size, and etc.
Meanwhile, a guest-owned command queue needs the kernel (a command queue
driver) to control the queue by reading/writing its consumer and producer
indexes, which means the command queue HW allows the guest kernel to get
a direct R/W access to those registers. Introduce an mmap infrastructure
to the iommufd core so as to support pass through a piece of MMIO region
from the host physical address space to the guest physical address space.
The VMA info (vm_pgoff/size) used by an mmap must be pre-allocated during
the IOMMUFD_CMD_VCMDQ_ALLOC and given those info to the user space as an
output driver-data by the IOMMUFD_CMD_VCMDQ_ALLOC. So, this requires a
driver-specific user data support by a vIOMMU object.
As a real-world use case, this series implements a vCMDQ support to the
tegra241-cmdqv driver for the vCMDQ on NVIDIA Grace CPU. In another word,
this is also the Tegra CMDQV series Part-2 (user-space support), reworked
from Previous RFCv1:
https://lore.kernel.org/all/cover.1712978212.git.nicolinc@nvidia.com/
This enables the HW accelerated feature for NVIDIA Grace CPU. Compared to
the standard SMMUv3 operating in the nested translation mode trapping CMDQ
for TLBI and ATC_INV commands, this gives a huge performance improvement:
70% to 90% reductions of invalidation time were measured by various DMA
unmap tests running in a guest OS.
This is on Github:
https://github.com/nicolinc/iommufd/commits/iommufd_vcmdq-v2
Paring QEMU branch for testing:
https://github.com/nicolinc/qemu/commits/wip/for_iommufd_vcmdq-v2
Changelog
v2
* Add Reviewed-by from Jason
* [smmu] Fix vsmmu initial value
* [smmu] Support impl for hw_info
* [tegra] Rename "slot" to "vsid"
* [tegra] Update kdocs and commit logs
* [tegra] Map/unmap LVCMDQ dynamically
* [tegra] Refcount the previous LVCMDQ
* [tegra] Return -EEXIST if LVCMDQ exists
* [tegra] Simplify VINTF cleanup routine
* [tegra] Use vmid and s2_domain in vsmmu
* [tegra] Rename "mmap_pgoff" to "immap_id"
* [tegra] Add more addr and length validation
* [iommufd] Add more narrative to mmap's kdoc
* [iommufd] Add iommufd_struct_depend/undepend()
* [iommufd] Rename vcmdq_free op to vcmdq_destroy
* [iommufd] Fix bug in iommu_copy_struct_to_user()
* [iommufd] Drop is_io from iommufd_ctx_alloc_mmap()
* [iommufd] Test the queue memory for its contiguity
* [iommufd] Return -ENXIO if address or length fails
* [iommufd] Do not change @min_last in mock_viommu_alloc()
* [iommufd] Generalize TEGRA241_VCMDQ data in core structure
* [iommufd] Add selftest coverage for IOMMUFD_CMD_VCMDQ_ALLOC
* [iommufd] Add iopt_pin_pages() to prevent queue memory from unmapping
v1
https://lore.kernel.org/all/cover.1744353300.git.nicolinc@nvidia.com/
Thanks
Nicolin
Nicolin Chen (22):
iommufd/viommu: Add driver-allocated vDEVICE support
iommu: Pass in a driver-level user data structure to viommu_alloc op
iommufd/viommu: Allow driver-specific user data for a vIOMMU object
iommu: Add iommu_copy_struct_to_user helper
iommufd: Add iommufd_struct_destroy to revert iommufd_viommu_alloc
iommufd/selftest: Support user_data in mock_viommu_alloc
iommufd/selftest: Add covearge for viommu data
iommufd: Abstract iopt_pin_pages and iopt_unpin_pages helpers
iommufd/viommu: Introduce IOMMUFD_OBJ_VCMDQ and its related struct
iommufd/viommmu: Add IOMMUFD_CMD_VCMDQ_ALLOC ioctl
iommufd: Add for-driver helpers iommufd_vcmdq_depend/undepend()
iommufd/selftest: Add coverage for IOMMUFD_CMD_VCMDQ_ALLOC
iommufd: Add mmap interface
iommufd/selftest: Add coverage for the new mmap interface
Documentation: userspace-api: iommufd: Update vCMDQ
iommu/arm-smmu-v3-iommufd: Add vsmmu_alloc impl op
iommu/arm-smmu-v3-iommufd: Support implementation-defined hw_info
iommu/tegra241-cmdqv: Use request_threaded_irq
iommu/tegra241-cmdqv: Simplify deinit flow in
tegra241_cmdqv_remove_vintf()
iommu/tegra241-cmdqv: Do not statically map LVCMDQs
iommu/tegra241-cmdqv: Add user-space use support
iommu/tegra241-cmdqv: Add IOMMU_VEVENTQ_TYPE_TEGRA241_CMDQV support
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 25 +-
drivers/iommu/iommufd/io_pagetable.h | 8 +
drivers/iommu/iommufd/iommufd_private.h | 25 +-
drivers/iommu/iommufd/iommufd_test.h | 20 +
include/linux/iommu.h | 43 +-
include/linux/iommufd.h | 146 ++++++
include/uapi/linux/iommufd.h | 113 ++++-
tools/testing/selftests/iommu/iommufd_utils.h | 51 +-
.../arm/arm-smmu-v3/arm-smmu-v3-iommufd.c | 42 +-
.../iommu/arm/arm-smmu-v3/tegra241-cmdqv.c | 451 +++++++++++++++++-
drivers/iommu/iommufd/device.c | 117 +----
drivers/iommu/iommufd/driver.c | 81 ++++
drivers/iommu/iommufd/io_pagetable.c | 95 ++++
drivers/iommu/iommufd/main.c | 58 ++-
drivers/iommu/iommufd/selftest.c | 123 ++++-
drivers/iommu/iommufd/viommu.c | 111 ++++-
tools/testing/selftests/iommu/iommufd.c | 93 +++-
.../selftests/iommu/iommufd_fail_nth.c | 11 +-
Documentation/userspace-api/iommufd.rst | 14 +
19 files changed, 1436 insertions(+), 191 deletions(-)
--
2.43.0
5 months, 2 weeks
- 8
- 145
[PATCH v3 0/3] introduce PIDFD_SELF* sentinels
by Lorenzo Stoakes
If you wish to utilise a pidfd interface to refer to the current process or
thread it is rather cumbersome, requiring something like:
int pidfd = pidfd_open(getpid(), 0 or PIDFD_THREAD);
...
close(pidfd);
Or the equivalent call opening /proc/self. It is more convenient to use a
sentinel value to indicate to an interface that accepts a pidfd that we
simply wish to refer to the current process thread.
This series introduces sentinels for this purposes which can be passed as
the pidfd in this instance rather than having to establish a dummy fd for
this purpose.
It is useful to refer to both the current thread from the userland's
perspective for which we use PIDFD_SELF, and the current process from the
userland's perspective, for which we use PIDFD_SELF_PROCESS.
There is unfortunately some confusion between the kernel and userland as to
what constitutes a process - a thread from the userland perspective is a
process in userland, and a userland process is a thread group (more
specifically the thread group leader from the kernel perspective). We
therefore alias things thusly:
* PIDFD_SELF_THREAD aliased by PIDFD_SELF - use PIDTYPE_PID.
* PIDFD_SELF_THREAD_GROUP alised by PIDFD_SELF_PROCESS - use PIDTYPE_TGID.
In all of the kernel code we refer to PIDFD_SELF_THREAD and
PIDFD_SELF_THREAD_GROUP. However we expect users to use PIDFD_SELF and
PIDFD_SELF_PROCESS.
This matters for cases where, for instance, a user unshare()'s FDs or does
thread-specific signal handling and where the user would be hugely confused
if the FDs referenced or signal processed referred to the thread group
leader rather than the individual thread.
We ensure that pidfd_send_signal() and pidfd_getfd() work correctly, and
assert as much in selftests. All other interfaces except setns() will work
implicitly with this new interface, however it doesn't make sense to test
waitid(P_PIDFD, ...) as waiting on ourselves is a blocking operation.
In the case of setns() we explicitly disallow use of PIDFD_SELF* as it
doesn't make sense to obtain the namespaces of our own process, and it
would require work to implement this functionality there that would be of
no use.
We also do not provide the ability to utilise PIDFD_SELF* in ordinary fd
operations such as open() or poll(), as this would require extensive work
and be of no real use.
v3:
* Do not fput() an invalid fd as reported by kernel test bot.
* Fix unintended churn from moving variable declaration.
v2:
* Fix tests as reported by Shuah.
* Correct RFC version lore link.
https://lore.kernel.org/linux-mm/cover.1728643714.git.lorenzo.stoakes@oracl…
Non-RFC v1:
* Removed RFC tag - there seems to be general consensus that this change is
a good idea, but perhaps some debate to be had on implementation. It
seems sensible then to move forward with the RFC flag removed.
* Introduced PIDFD_SELF_THREAD, PIDFD_SELF_THREAD_GROUP and their aliases
PIDFD_SELF and PIDFD_SELF_PROCESS respectively.
* Updated testing accordingly.
https://lore.kernel.org/linux-mm/cover.1728578231.git.lorenzo.stoakes@oracl…
RFC version:
https://lore.kernel.org/linux-mm/cover.1727644404.git.lorenzo.stoakes@oracl…
Lorenzo Stoakes (3):
pidfd: extend pidfd_get_pid() and de-duplicate pid lookup
pidfd: add PIDFD_SELF_* sentinels to refer to own thread/process
selftests: pidfd: add tests for PIDFD_SELF_*
include/linux/pid.h | 43 +++++-
include/uapi/linux/pidfd.h | 15 ++
kernel/exit.c | 3 +-
kernel/nsproxy.c | 1 +
kernel/pid.c | 73 ++++++---
kernel/signal.c | 26 +---
tools/testing/selftests/pidfd/pidfd.h | 8 +
.../selftests/pidfd/pidfd_getfd_test.c | 141 ++++++++++++++++++
.../selftests/pidfd/pidfd_setns_test.c | 11 ++
tools/testing/selftests/pidfd/pidfd_test.c | 76 ++++++++--
10 files changed, 342 insertions(+), 55 deletions(-)
--
2.46.2
5 months, 2 weeks
- 6
- 31
[PATCH 0/8] stackleak: Support Clang stack depth tracking
by Kees Cook
Hi,
As part of looking at what GCC plugins could be replaced with Clang
implementations, this series uses the recently landed stack depth tracking
callback in Clang[1] to implement the stackleak feature. Since the Clang
feature is now landed, I'm moving this out of RFC to a v1.
Since this touches a lot of arch-specific Makefiles, I tried to trim
the CC list down to just mailing lists in those cases, otherwise the CC
was giant.
Thanks!
-Kees
[1] https://clang.llvm.org/docs/SanitizerCoverage.html#tracing-stack-depth
v1:
- Finalize Clang URLs for landed feature
- Perform CFLAGS enabling more sanely, as done for randstruct
- Split __no_sanitize_coverage into separate patch
- Update hardening.config and MAINTAINERS
- Fix bug found with nvme tree
RFC: https://lore.kernel.org/lkml/20250502185834.work.560-kees@kernel.org/
Kees Cook (8):
nvme-pci: Make nvme_pci_npages_prp() __always_inline
init.h: Disable sanitizer coverage for __init and __head
stackleak: Rename CONFIG_GCC_PLUGIN_STACKLEAK to CONFIG_STACKLEAK
stackleak: Rename stackleak_track_stack to __sanitizer_cov_stack_depth
stackleak: Split STACKLEAK_CFLAGS from GCC_PLUGINS_CFLAGS
stackleak: Support Clang stack depth tracking
configs/hardening: Enable CONFIG_STACKLEAK
configs/hardening: Enable CONFIG_INIT_ON_FREE_DEFAULT_ON
security/Kconfig.hardening | 25 ++++++----
Makefile | 1 +
arch/arm/boot/compressed/Makefile | 2 +-
arch/arm/vdso/Makefile | 2 +-
arch/arm64/kernel/pi/Makefile | 2 +-
arch/arm64/kernel/vdso/Makefile | 3 +-
arch/arm64/kvm/hyp/nvhe/Makefile | 2 +-
arch/riscv/kernel/pi/Makefile | 2 +-
arch/riscv/purgatory/Makefile | 2 +-
arch/sparc/vdso/Makefile | 3 +-
arch/x86/entry/vdso/Makefile | 3 +-
arch/x86/purgatory/Makefile | 2 +-
drivers/firmware/efi/libstub/Makefile | 6 +--
kernel/Makefile | 4 +-
lib/Makefile | 2 +-
scripts/Makefile.gcc-plugins | 16 +------
scripts/Makefile.stackleak | 21 +++++++++
scripts/gcc-plugins/stackleak_plugin.c | 52 ++++++++++-----------
Documentation/admin-guide/sysctl/kernel.rst | 2 +-
Documentation/security/self-protection.rst | 2 +-
arch/x86/entry/calling.h | 4 +-
arch/x86/include/asm/init.h | 2 +-
include/linux/init.h | 4 +-
include/linux/sched.h | 4 +-
include/linux/stackleak.h | 6 +--
arch/arm/kernel/entry-common.S | 2 +-
arch/arm64/kernel/entry.S | 2 +-
arch/riscv/kernel/entry.S | 2 +-
arch/s390/kernel/entry.S | 2 +-
drivers/misc/lkdtm/stackleak.c | 8 ++--
drivers/nvme/host/pci.c | 2 +-
kernel/stackleak.c | 4 +-
tools/objtool/check.c | 2 +-
tools/testing/selftests/lkdtm/config | 2 +-
MAINTAINERS | 6 ++-
kernel/configs/hardening.config | 6 +++
36 files changed, 122 insertions(+), 90 deletions(-)
create mode 100644 scripts/Makefile.stackleak
--
2.34.1
5 months, 2 weeks
- 5
- 14
[PATCH net] net: Lock lower level devices when updating features
by Cosmin Ratiu
__netdev_update_features() expects the netdevice to be ops-locked, but
it gets called recursively on the lower level netdevices to sync their
features, and nothing locks those.
This commit fixes that, with the assumption that it shouldn't be possible
for both higher-level and lover-level netdevices to require the instance
lock, because that would lead to lock dependency warnings.
Without this, playing with higher level (e.g. vxlan) netdevices on top
of netdevices with instance locking enabled can run into issues:
WARNING: CPU: 59 PID: 206496 at ./include/net/netdev_lock.h:17 netif_napi_add_weight_locked+0x753/0xa60
[...]
Call Trace:
<TASK>
mlx5e_open_channel+0xc09/0x3740 [mlx5_core]
mlx5e_open_channels+0x1f0/0x770 [mlx5_core]
mlx5e_safe_switch_params+0x1b5/0x2e0 [mlx5_core]
set_feature_lro+0x1c2/0x330 [mlx5_core]
mlx5e_handle_feature+0xc8/0x140 [mlx5_core]
mlx5e_set_features+0x233/0x2e0 [mlx5_core]
__netdev_update_features+0x5be/0x1670
__netdev_update_features+0x71f/0x1670
dev_ethtool+0x21c5/0x4aa0
dev_ioctl+0x438/0xae0
sock_ioctl+0x2ba/0x690
__x64_sys_ioctl+0xa78/0x1700
do_syscall_64+0x6d/0x140
entry_SYSCALL_64_after_hwframe+0x4b/0x53
</TASK>
Fixes: 7e4d784f5810 ("net: hold netdev instance lock during rtnetlink operations")
Signed-off-by: Cosmin Ratiu <cratiu(a)nvidia.com>
---
net/core/dev.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/net/core/dev.c b/net/core/dev.c
index 1be7cb73a602..77472364225c 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -10620,8 +10620,11 @@ int __netdev_update_features(struct net_device *dev)
/* some features must be disabled on lower devices when disabled
* on an upper device (think: bonding master or bridge)
*/
- netdev_for_each_lower_dev(dev, lower, iter)
+ netdev_for_each_lower_dev(dev, lower, iter) {
+ netdev_lock_ops(lower);
netdev_sync_lower_features(dev, lower, features);
+ netdev_unlock_ops(lower);
+ }
if (!err) {
netdev_features_t diff = features ^ dev->features;
--
2.45.0
5 months, 2 weeks
- 2
- 9
[PATCH bpf-next v3 0/5] Replace CONFIG_DMABUF_SYSFS_STATS with BPF
by T.J. Mercier
Until CONFIG_DMABUF_SYSFS_STATS was added [1] it was only possible to
perform per-buffer accounting with debugfs which is not suitable for
production environments. Eventually we discovered the overhead with
per-buffer sysfs file creation/removal was significantly impacting
allocation and free times, and exacerbated kernfs lock contention. [2]
dma_buf_stats_setup() is responsible for 39% of single-page buffer
creation duration, or 74% of single-page dma_buf_export() duration when
stressing dmabuf allocations and frees.
I prototyped a change from per-buffer to per-exporter statistics with a
RCU protected list of exporter allocations that accommodates most (but
not all) of our use-cases and avoids almost all of the sysfs overhead.
While that adds less overhead than per-buffer sysfs, and less even than
the maintenance of the dmabuf debugfs_list, it's still *additional*
overhead on top of the debugfs_list and doesn't give us per-buffer info.
This series uses the existing dmabuf debugfs_list to implement a BPF
dmabuf iterator, which adds no overhead to buffer allocation/free and
provides per-buffer info. The list has been moved outside of
CONFIG_DEBUG_FS scope so that it is always populated. The BPF program
loaded by userspace that extracts per-buffer information gets to define
its own interface which avoids the lack of ABI stability with debugfs.
This will allow us to replace our use of CONFIG_DMABUF_SYSFS_STATS, and
the plan is to remove it from the kernel after the next longterm stable
release.
[1] https://lore.kernel.org/linux-media/20201210044400.1080308-1-hridya@google.…
[2] https://lore.kernel.org/all/20220516171315.2400578-1-tjmercier@google.com
v1: https://lore.kernel.org/all/20250414225227.3642618-1-tjmercier@google.com
v1 -> v2:
Make the DMA buffer list independent of CONFIG_DEBUG_FS per Christian König
Add CONFIG_DMA_SHARED_BUFFER check to kernel/bpf/Makefile per kernel test robot
Use BTF_ID_LIST_SINGLE instead of BTF_ID_LIST_GLOBAL_SINGLE per Song Liu
Fixup comment style, mixing code/declarations, and use ASSERT_OK_FD in selftest per Song Liu
Add BPF_ITER_RESCHED feature to bpf_dmabuf_reg_info per Alexei Starovoitov
Add open-coded iterator and selftest per Alexei Starovoitov
Add a second test buffer from the system dmabuf heap to selftests
Use the BPF program we'll use in production for selftest per Alexei Starovoitov
https://r.android.com/c/platform/system/bpfprogs/+/3616123/2/dmabufIter.c
https://r.android.com/c/platform/system/memory/libmeminfo/+/3614259/1/libdm…
v2: https://lore.kernel.org/all/20250504224149.1033867-1-tjmercier@google.com
v2 -> v3:
Rebase onto bpf-next/master
Move get_next_dmabuf() into drivers/dma-buf/dma-buf.c, along with the
new get_first_dmabuf(). This avoids having to expose the dmabuf list
and mutex to the rest of the kernel, and keeps the dmabuf mutex
operations near each other in the same file. (Christian König)
Add Christian's RB to dma-buf: Rename debugfs symbols
Drop RFC: dma-buf: Remove DMA-BUF statistics
T.J. Mercier (5):
dma-buf: Rename debugfs symbols
bpf: Add dmabuf iterator
bpf: Add open coded dmabuf iterator
selftests/bpf: Add test for dmabuf_iter
selftests/bpf: Add test for open coded dmabuf_iter
drivers/dma-buf/dma-buf.c | 94 +++++--
include/linux/dma-buf.h | 5 +-
kernel/bpf/Makefile | 3 +
kernel/bpf/dmabuf_iter.c | 149 ++++++++++
kernel/bpf/helpers.c | 5 +
.../testing/selftests/bpf/bpf_experimental.h | 5 +
tools/testing/selftests/bpf/config | 3 +
.../selftests/bpf/prog_tests/dmabuf_iter.c | 258 ++++++++++++++++++
.../testing/selftests/bpf/progs/dmabuf_iter.c | 91 ++++++
9 files changed, 591 insertions(+), 22 deletions(-)
create mode 100644 kernel/bpf/dmabuf_iter.c
create mode 100644 tools/testing/selftests/bpf/prog_tests/dmabuf_iter.c
create mode 100644 tools/testing/selftests/bpf/progs/dmabuf_iter.c
base-commit: 43745d11bfd9683abdf08ad7a5cc403d6a9ffd15
--
2.49.0.1045.g170613ef41-goog
5 months, 2 weeks
- 3
- 10
[PATCH RFC v7 0/8] Add NUMA mempolicy support for KVM guest-memfd
by Shivank Garg
KVM's guest-memfd memory backend currently lacks support for NUMA policy
enforcement, causing guest memory allocations to be distributed arbitrarily
across host NUMA nodes regardless of the policy specified by the VMM. This
occurs because conventional userspace NUMA control mechanisms like mbind()
are ineffective with guest-memfd, as the memory isn't directly mapped to
userspace when allocations occur.
This patch-series adds NUMA-aware memory placement for guest_memfd backed
KVM guests. Based on community feedback, the approach has evolved as
follows:
- v1,v2: Extended the KVM_CREATE_GUEST_MEMFD IOCTL to pass mempolicy.
- v3: Introduced fbind() syscall for VMM memory-placement configuration.
- v4-v6: Current approach using shared_policy support and vm_ops (based on
suggestions from David[1] and guest_memfd biweekly upstream
calls[2][4]).
- v7: Use inodes to store NUMA policy instead of file[5].
== Implementation ==
This series implements proper NUMA policy support for guest-memfd by:
1. Adding mempolicy-aware allocation APIs to the filemap layer.
2. Add custom inodes (via a dedicated slab-allocated inode cache,
kvm_gmem_inode_info) to store NUMA policy and metadata for guest memory.
3. Implementing get/set_policy vm_ops in guest_memfd to support shared policy.
With these changes, VMMs can now control guest memory placement by
specifying:
- Policy modes: default, bind, interleave, or preferred
- Host NUMA nodes: List of target nodes for memory allocation
Policies only affect future allocations and do not migrate existing memory.
This matches mbind(2)'s default behavior which affects only new allocations
unless overridden with MPOL_MF_MOVE/MPOL_MF_MOVE_ALL flags (Not supported
for guest_memfd as it is unmovable).
This series builds on the existing guest-memfd support in KVM and provides
a clean integration path for NUMA-aware memory management in confidential
computing environments. The work is primarily focused on supporting SEV-SNP
requirements, though the benefits extend to any VMM using the guest-memfd
backend that needs control over guest memory placement.
== Example usage with QEMU (requires patched QEMU from [3]) ==
Snippet of the QEMU changes[3] needed to support this feature:
/* Create and map guest-memfd region */
new_block->guest_memfd = kvm_create_guest_memfd(
new_block->max_length, 0, errp);
...
void *ptr_memfd = mmap(NULL, new_block->max_length,
PROT_READ | PROT_WRITE, MAP_SHARED,
new_block->guest_memfd, 0);
...
/* Apply NUMA policy */
int ret = mbind(ptr_memfd, new_block->max_length,
backend->policy, backend->host_nodes,
maxnode+1, 0);
...
QEMU Command to run SEV-SNP guest with interleaved memory across
nodes 0 and 1 of the host:
$ qemu-system-x86_64 \
-enable-kvm \
...
-machine memory-encryption=sev0,vmport=off \
-object sev-snp-guest,id=sev0,cbitpos=51,reduced-phys-bits=1 \
-numa node,nodeid=0,memdev=ram0,cpus=0-15 \
-object memory-backend-memfd,id=ram0,host-nodes=0-1,policy=interleave,size=1024M,share=true,prealloc=false
== Experiment and Analysis ==
SEV-SNP enabled host, AMD Zen 3, 2 socket 2 NUMA node system
NUMA for Policy Guest Node 0: policy=interleave, host-node=0-1
Test: Allocate and touch 50GB inside guest on node=0.
* Generic Kernel (without NUMA supported guest-memfd):
Node 0 Node 1 Total
Before running Test:
MemUsed 9981.60 3312.00 13293.60
After running Test:
MemUsed 61451.72 3201.62 64653.34
Arbitrary allocations: all ~50GB allocated on node 0.
* With NUMA supported guest-memfd:
Node 0 Node 1 Total
Before running Test:
MemUsed 5003.88 3963.07 8966.94
After running Test:
MemUsed 30607.55 29670.00 60277.55
Balanced memory distribution: Equal increase (~25GB) on both nodes.
== Conclusion ==
Adding the NUMA-aware memory management to guest_memfd will make a lot of
sense. Improving performance of memory-intensive and locality-sensitive
workloads with fine-grained control over guest memory allocations, as
pointed out in the analysis.
Please review and provide feedback!
Thanks,
Shivank
[1] https://lore.kernel.org/all/6fbef654-36e2-4be5-906e-2a648a845278@redhat.com
[2] https://lore.kernel.org/all/6f2bfac2-d9e7-4e4a-9298-7accded16b4f@redhat.com
[3] https://github.com/shivankgarg98/qemu/tree/guest_memfd_mbind_NUMA
[4] https://lore.kernel.org/all/2b77e055-98ac-43a1-a7ad-9f9065d7f38f@amd.com
[5] https://lore.kernel.org/all/diqzbjumm167.fsf@ackerleytng-ctop.c.googlers.com
== Earlier postings and changelogs ==
v7 (current):
- Add fixes suggested by Vlastimil and Ackerley.
- Store NUMA policy in custom inode struct instead of file.
v6:
- https://lore.kernel.org/all/20250226082549.6034-1-shivankg@amd.com
- Rebase to linux mainline
- Drop RFC tag
- Add selftests to ensure NUMA support for guest_memfd works correctly.
v5:
- https://lore.kernel.org/all/20250219101559.414878-1-shivankg@amd.com
- Fix documentation and style issues.
- Use EXPORT_SYMBOL_GPL
- Split preparatory change in separate patch
v4:
- https://lore.kernel.org/all/20250210063227.41125-1-shivankg@amd.com
- Dropped fbind() approach in favor of shared policy support.
v3:
- https://lore.kernel.org/all/20241105164549.154700-1-shivankg@amd.com
- Introduce fbind() syscall and drop the IOCTL-based approach.
v2:
- https://lore.kernel.org/all/20240919094438.10987-1-shivankg@amd.com
- Add fixes suggested by Matthew Wilcox.
v1:
- https://lore.kernel.org/all/20240916165743.201087-1-shivankg@amd.com
- Proposed IOCTL based approach to pass NUMA mempolicy.
Ackerley Tng (1):
KVM: guest_memfd: Make guest mem use guest mem inodes instead of
anonymous inodes
Shivank Garg (6):
mm/mempolicy: Export memory policy symbols
security: Export security_inode_init_security_anon for KVM guest_memfd
KVM: Add kvm_gmem_exit() cleanup function
KVM: guest_memfd: Add slab-allocated inode cache
KVM: guest_memfd: Enforce NUMA mempolicy using shared policy
KVM: guest_memfd: selftests: Add tests for mmap and NUMA policy
support
Shivansh Dhiman (1):
mm/filemap: Add mempolicy support to the filemap layer
include/linux/pagemap.h | 41 +++
include/uapi/linux/magic.h | 1 +
mm/filemap.c | 27 +-
mm/mempolicy.c | 6 +
security/security.c | 1 +
.../testing/selftests/kvm/guest_memfd_test.c | 86 +++++-
virt/kvm/guest_memfd.c | 261 ++++++++++++++++--
virt/kvm/kvm_main.c | 2 +
virt/kvm/kvm_mm.h | 6 +
9 files changed, 402 insertions(+), 29 deletions(-)
--
2.34.1
5 months, 2 weeks
- 5
- 20
[PATCH net-next 0/6] selftests: net: configure rp_filter in setup_ns
by Hangbin Liu
Some distributions enable rp_filter globally by default, which can interfere
with various test cases. To address this, many tests explicitly disable
rp_filter within their scripts.
To avoid duplication and ensure consistent behavior across tests, this patch
moves the rp_filter configuration into setup_ns, applied immediately after a
new namespace is created. This change ensures that all namespace-based tests
inherit the appropriate rp_filter settings, simplifying individual test
scripts and improving maintainability.
BTW, the patch 4/6 for srv6 is a bit large. Please tell me if you think
I need to break this one.
Hangbin Liu (6):
selftests: net: disable rp_filter after namespace initialization
selftests: net: remove redundant rp_filter configuration
selftests: net: use setup_ns for bareudp testing
selftests: net: use setup_ns for SRv6 tests and remove rp_filter
configuration
selftests: netfilter: remove rp_filter configuration
selftests: mptcp: remove rp_filter configuration
tools/testing/selftests/net/bareudp.sh | 49 ++---------
tools/testing/selftests/net/fib_rule_tests.sh | 3 -
tools/testing/selftests/net/fib_tests.sh | 3 -
tools/testing/selftests/net/icmp_redirect.sh | 2 -
tools/testing/selftests/net/lib.sh | 2 +
.../testing/selftests/net/mptcp/mptcp_lib.sh | 2 -
.../selftests/net/netfilter/br_netfilter.sh | 3 -
.../selftests/net/netfilter/bridge_brouter.sh | 2 -
.../selftests/net/netfilter/conntrack_vrf.sh | 3 -
tools/testing/selftests/net/netfilter/ipvs.sh | 6 --
.../selftests/net/netfilter/nft_fib.sh | 2 -
.../selftests/net/netfilter/nft_nat_zones.sh | 2 -
.../testing/selftests/net/netfilter/rpath.sh | 18 ++--
.../selftests/net/srv6_end_dt46_l3vpn_test.sh | 5 --
.../selftests/net/srv6_end_dt4_l3vpn_test.sh | 5 --
.../net/srv6_end_next_csid_l3vpn_test.sh | 77 ++++-------------
.../net/srv6_end_x_next_csid_l3vpn_test.sh | 83 +++++--------------
.../net/srv6_hencap_red_l3vpn_test.sh | 74 ++++-------------
.../net/srv6_hl2encap_red_l2vpn_test.sh | 77 ++++-------------
19 files changed, 87 insertions(+), 331 deletions(-)
--
2.46.0
5 months, 2 weeks
- 4
- 10
[PATCH] kbuild: use ARCH from compile.h in unclean source tree msg
by Shuah Khan
When make finds the source tree unclean, it prints a message to run
"make ARCH=x86_64 mrproper" message using the ARCH from the command
line. The ARCH specified in the command line could be different from
the ARCH of the existing build in the source tree.
This could cause problems in regular kernel build and kunit workflows.
Regular workflow:
- Build x86_64 kernel
$ make ARCH=x86_64
- Try building another arch kernel out of tree with O=
$ make ARCH=um O=/linux/build
- kbuild detects source tree is unclean
***
*** The source tree is not clean, please run 'make ARCH=um mrproper'
*** in /linux/linux_srcdir
***
- Clean source tree as suggested by kbuild
$ make ARCH=um mrproper
- Source clean appears to be clean, but it leaves behind generated header
files under arch/x86
arch/x86/realmode/rm/pasyms.h
A subsequent x86_64e build fails with
"undefined symbol sev_es_trampoline_start referenced ..."
kunit workflow runs into this issue:
- Build x86_64 kernel
- Run kunit tests: it tries to build for user specified ARCH or uml
as default:
$ ./tools/testing/kunit/kunit.py run
- kbuild detects unclean source tree
***
*** The source tree is not clean, please run 'make ARCH=um mrproper'
*** in /linux/linux_6.15
***
- Clean source tree as suggested by kbuild
$ make ARCH=um mrproper
- Source clean appears to be clean, but it leaves behind generated header
files under arch/x86
The problem shows when user tries to run tests on ARCH=x86_64:
$ ./tools/testing/kunit/kunit.py run ARCH=x86_64
"undefined symbol sev_es_trampoline_start referenced ..."
Build trips on arch/x86/realmode/rm/pasyms.h left behind by a prior
x86_64 build.
Problems related to partially cleaned source tree are hard to debug.
Change Makefile to unclean source logic to use ARCH from compile.h
UTS_MACHINE string. With this change kbuild prints:
$ ./tools/testing/kunit/kunit.py run
***
*** The source tree is not clean, please run 'make ARCH=x86_64 mrproper'
*** in /linux/linux_6.15
***
Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org>
---
Makefile | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/Makefile b/Makefile
index 5aa9ee52a765..7ee29136b4da 100644
--- a/Makefile
+++ b/Makefile
@@ -674,7 +674,7 @@ ifeq ($(KBUILD_EXTMOD),)
-d $(srctree)/include/config -o \
-d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \
echo >&2 "***"; \
- echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \
+ echo >&2 "*** The source tree is not clean, please run 'make ARCH=$(shell grep UTS_MACHINE $(srctree)/include/generated/compile.h | cut -d '"' -f 2) mrproper'"; \
echo >&2 "*** in $(abs_srctree)";\
echo >&2 "***"; \
false; \
--
2.47.2
5 months, 2 weeks
- 4
- 8
[PATCH net] net: Lock netdevices during dev_shutdown
by Cosmin Ratiu
__qdisc_destroy() calls into various qdiscs .destroy() op, which in turn
can call .ndo_setup_tc(), which requires the netdev instance lock.
This commit extends the critical section in
unregister_netdevice_many_notify() to cover dev_shutdown() (and
dev_tcx_uninstall() as a side-effect) and acquires the netdev instance
lock in __dev_change_net_namespace() for the other dev_shutdown() call.
This should now guarantee that for all qdisc ops, the netdev instance
lock is held during .ndo_setup_tc().
Fixes: a0527ee2df3f ("net: hold netdev instance lock during qdisc ndo_setup_tc")
Signed-off-by: Cosmin Ratiu <cratiu(a)nvidia.com>
---
net/core/dev.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/net/core/dev.c b/net/core/dev.c
index 1be7cb73a602..92e004c354ea 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -11966,9 +11966,9 @@ void unregister_netdevice_many_notify(struct list_head *head,
struct sk_buff *skb = NULL;
/* Shutdown queueing discipline. */
+ netdev_lock_ops(dev);
dev_shutdown(dev);
dev_tcx_uninstall(dev);
- netdev_lock_ops(dev);
dev_xdp_uninstall(dev);
dev_memory_provider_uninstall(dev);
netdev_unlock_ops(dev);
@@ -12161,7 +12161,9 @@ int __dev_change_net_namespace(struct net_device *dev, struct net *net,
synchronize_net();
/* Shutdown queueing discipline. */
+ netdev_lock_ops(dev);
dev_shutdown(dev);
+ netdev_unlock_ops(dev);
/* Notify protocols, that we are about to destroy
* this device. They should clean all the things.
--
2.45.0
5 months, 2 weeks
- 3
- 2
[PATCH] clk: test: Forward-declare struct of_phandle_args in kunit/clk.h
by Richard Fitzgerald
Add a forward-declare of struct of_phandle_args to prevent the compiler
warning:
../include/kunit/clk.h:29:63: warning: ‘struct of_phandle_args’ declared
inside parameter list will not be visible outside of this definition or
declaration
struct clk_hw *(*get)(struct of_phandle_args *clkspec, void *data),
Signed-off-by: Richard Fitzgerald <rf(a)opensource.cirrus.com>
---
include/kunit/clk.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/include/kunit/clk.h b/include/kunit/clk.h
index 0afae7688157..f226044cc78d 100644
--- a/include/kunit/clk.h
+++ b/include/kunit/clk.h
@@ -6,6 +6,7 @@ struct clk;
struct clk_hw;
struct device;
struct device_node;
+struct of_phandle_args;
struct kunit;
struct clk *
--
2.43.0
5 months, 3 weeks
- 2
- 1
[PATCH v2] selftests: pid_namespace: Fix missing mount headers in pid_max.c
by Moon Hee Lee
Fix compilation errors in pid_max.c by including <sys/mount.h>, which
provides definitions for mount(), umount2(), MS_PRIVATE, MS_REC, and
MNT_DETACH.
Without this header, the build fails with implicit declarations and
undefined constants during selftest compilation.
Changes since v1:
- Included example build errors below for clarity
Compile error:
pid_max.c: In function ‘pid_max_cb’:
pid_max.c:42:15: warning: implicit declaration of function ‘mount’ [-Wimplicit-function-declaration]
42 | ret = mount("", "/", NULL, MS_PRIVATE | MS_REC, 0);
| ^~~~~
pid_max.c:42:36: error: ‘MS_PRIVATE’ undeclared; did you mean ‘MAP_PRIVATE’?
pid_max.c:42:49: error: ‘MS_REC’ undeclared
pid_max.c:48:9: warning: implicit declaration of function ‘umount2’
pid_max.c:48:26: error: ‘MNT_DETACH’ undeclared
[...output trimmed for brevity...]
make: *** [../lib.mk:222: /linux_mainline/tools/testing/selftests/pid_namespace/pid_max] Error 1
Signed-off-by: Moon Hee Lee <moonhee.lee.ca(a)gmail.com>
---
tools/testing/selftests/pid_namespace/pid_max.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/tools/testing/selftests/pid_namespace/pid_max.c b/tools/testing/selftests/pid_namespace/pid_max.c
index 51c414faabb0..972bedc475f1 100644
--- a/tools/testing/selftests/pid_namespace/pid_max.c
+++ b/tools/testing/selftests/pid_namespace/pid_max.c
@@ -11,6 +11,7 @@
#include <string.h>
#include <syscall.h>
#include <sys/wait.h>
+#include <sys/mount.h>
#include "../kselftest_harness.h"
#include "../pidfd/pidfd.h"
--
2.43.0
5 months, 3 weeks
- 1
- 0
[PATCH v5 net-next 00/15] AccECN protocol patch series
by chia-yu.chang＠nokia-bell-labs.com
From: Chia-Yu Chang <chia-yu.chang(a)nokia-bell-labs.com>
Hello,
Plese find the v5:
v5 (22-Apr-2025)
- Further fix for 32-bit ARM alignment in tcp.c (Simon Horman <horms(a)kernel.org>)
v4 (18-Apr-2025)
- Fix 32-bit ARM assertion for alignment requirement (Simon Horman <horms(a)kernel.org>)
v3 (14-Apr-2025)
- Fix patch apply issue in v2 (Jakub Kicinski <kuba(a)kernel.org>)
v2 (18-Mar-2025)
- Add one missing patch from previous AccECN protocol preparation patch series to this patch series
The full patch series can be found in
https://github.com/L4STeam/linux-net-next/commits/upstream_l4steam/
The Accurate ECN draft can be found in
https://datatracker.ietf.org/doc/html/draft-ietf-tcpm-accurate-ecn-28
Best regards,
Chia-Yu
Chia-Yu Chang (1):
tcp: accecn: AccECN option failure handling
Ilpo Järvinen (14):
tcp: reorganize SYN ECN code
tcp: fast path functions later
tcp: AccECN core
tcp: accecn: AccECN negotiation
tcp: accecn: add AccECN rx byte counters
tcp: accecn: AccECN needs to know delivered bytes
tcp: allow embedding leftover into option padding
tcp: sack option handling improvements
tcp: accecn: AccECN option
tcp: accecn: AccECN option send control
tcp: accecn: AccECN option ceb/cep heuristic
tcp: accecn: AccECN ACE field multi-wrap heuristic
tcp: accecn: try to fit AccECN option with SACK
tcp: try to avoid safer when ACKs are thinned
include/linux/tcp.h | 27 +-
include/net/netns/ipv4.h | 2 +
include/net/tcp.h | 198 +++++++++++--
include/uapi/linux/tcp.h | 7 +
net/ipv4/syncookies.c | 3 +
net/ipv4/sysctl_net_ipv4.c | 19 ++
net/ipv4/tcp.c | 26 +-
net/ipv4/tcp_input.c | 591 +++++++++++++++++++++++++++++++++++--
net/ipv4/tcp_ipv4.c | 5 +-
net/ipv4/tcp_minisocks.c | 92 +++++-
net/ipv4/tcp_output.c | 302 +++++++++++++++++--
net/ipv6/syncookies.c | 1 +
net/ipv6/tcp_ipv6.c | 1 +
13 files changed, 1178 insertions(+), 96 deletions(-)
--
2.34.1
5 months, 3 weeks
- 7
- 39
[PATCH v8 00/10] Basic SEV-SNP Selftests
by Pratik R. Sampat
This patch series extends the sev_init2 and the sev_smoke test to
exercise the SEV-SNP VM launch workflow.
Primarily, it introduces the architectural defines, its support in the
SEV library and extends the tests to interact with the SEV-SNP ioctl()
wrappers.
Patch 1 - Do not advertise SNP on initialization failure
Patch 2 - SNP test for KVM_SEV_INIT2
Patch 3 - Add vmgexit helper
Patch 4 - Add SMT control interface helper
Patch 5 - Replace assert() with TEST_ASSERT_EQ()
Patch 6 - Introduce SEV+ VM type check
Patch 7 - SNP iotcl() plumbing for the SEV library
Patch 8 - Force set GUEST_MEMFD for SNP
Patch 9 - Cleanups of smoke test - Decouple policy from type
Patch 10 - SNP smoke test
The series is based on
git.kernel.org/pub/scm/virt/kvm/kvm.git next
v7..v8:
* Dropped exporting the SNP initialized API from ccp to KVM. Instead
call SNP_PLATFORM_STATUS within KVM to query the initialization. (Tom)
While it may be cheaper to query sev->snp_initialized from ccp, making
the SNP platform call within KVM does away with any dependencies.
v6..v7:
https://lore.kernel.org/kvm/20250221210200.244405-7-prsampat@amd.com/
Based on comments from Sean -
* Replaced FW check with sev->snp_initialized
* Dropped the patch which removes SEV+ KVM advertisement if INIT fails.
This should be now be resolved by the combination of the patches [1,2]
from Ashish.
* Change vmgexit to an inline function
* Export SMT control parsing interface to kvm_util
Note: hyperv_cpuid KST only compile tested
* Replace assert() with TEST_ASSERT_EQ() within SEV library
* Define KVM_SEV_PAGE_TYPE_INVALID for SEV call of encrypt_region()
* Parameterize encrypt_region() to include privatize_region()
* Deduplication of sev test calls between SEV,SEV-ES and SNP
* Removed FW version tests for SNP
* Included testing of SNP_POLICY_DBG
* Dropped most tags from patches that have been changed or indirectly
affected
[1] https://lore.kernel.org/all/d6d08c6b-9602-4f3d-92c2-8db6d50a1b92@amd.com
[2] https://lore.kernel.org/all/f78ddb64087df27e7bcb1ae0ab53f55aa0804fab.173922…
v5..v6:
https://lore.kernel.org/kvm/ab433246-e97c-495b-ab67-b0cb1721fb99@amd.com/
* Rename is_sev_platform_init to sev_fw_initialized (Nikunj)
* Rename KVM CPU feature X86_FEATURE_SNP to X86_FEATURE_SEV_SNP (Nikunj)
* Collected Tags from Nikunj, Pankaj, Srikanth.
v4..v5:
https://lore.kernel.org/kvm/8e7d8172-879e-4a28-8438-343b1c386ec9@amd.com/
* Introduced a check to disable advertising support for SEV, SEV-ES
and SNP when platform initialization fails (Nikunj)
* Remove the redundant SNP check within is_sev_vm() (Nikunj)
* Cleanup of the encrypt_region flow for better readability (Nikunj)
* Refactor paths to use the canonical $(ARCH) to rebase for kvm/next
v3..v4:
https://lore.kernel.org/kvm/20241114234104.128532-1-pratikrajesh.sampat@amd…
* Remove SNP FW API version check in the test and ensure the KVM
capability advertises the presence of the feature. Retain the minimum
version definitions to exercise these API versions in the smoke test
* Retained only the SNP smoke test and SNP_INIT2 test
* The SNP architectural defined merged with SNP_INIT2 test patch
* SNP shutdown merged with SNP smoke test patch
* Add SEV VM type check to abstract comparisons and reduce clutter
* Define a SNP default policy which sets bits based on the presence of
SMT
* Decouple privatization and encryption for it to be SNP agnostic
* Assert for only positive tests using vm_ioctl()
* Dropped tested-by tags
In summary - based on comments from Sean, I have primarily reduced the
scope of this patch series to focus on breaking down the SNP smoke test
patch (v3 - patch2) to first introduce SEV-SNP support and use this
interface to extend the sev_init2 and the sev_smoke test.
The rest of the v3 patchset that introduces ioctl, pre fault, fallocate
and negative tests, will be re-worked and re-introduced subsequently in
future patch series post addressing the issues discussed.
v2..v3:
https://lore.kernel.org/kvm/20240905124107.6954-1-pratikrajesh.sampat@amd.c…
* Remove the assignments for the prefault and fallocate test type
enums.
* Fix error message for sev launch measure and finish.
* Collect tested-by tags [Peter, Srikanth]
Pratik R. Sampat (10):
KVM: SEV: Disable SEV-SNP support on initialization failure
KVM: selftests: SEV-SNP test for KVM_SEV_INIT2
KVM: selftests: Add vmgexit helper
KVM: selftests: Add SMT control state helper
KVM: selftests: Replace assert() with TEST_ASSERT_EQ()
KVM: selftests: Introduce SEV VM type check
KVM: selftests: Add library support for interacting with SNP
KVM: selftests: Force GUEST_MEMFD flag for SNP VM type
KVM: selftests: Abstractions for SEV to decouple policy from type
KVM: selftests: Add a basic SEV-SNP smoke test
arch/x86/include/uapi/asm/kvm.h | 1 +
arch/x86/kvm/svm/sev.c | 30 +++++-
tools/arch/x86/include/uapi/asm/kvm.h | 1 +
.../testing/selftests/kvm/include/kvm_util.h | 35 +++++++
.../selftests/kvm/include/x86/processor.h | 1 +
tools/testing/selftests/kvm/include/x86/sev.h | 42 ++++++++-
tools/testing/selftests/kvm/lib/kvm_util.c | 7 +-
.../testing/selftests/kvm/lib/x86/processor.c | 4 +-
tools/testing/selftests/kvm/lib/x86/sev.c | 93 +++++++++++++++++--
.../testing/selftests/kvm/x86/hyperv_cpuid.c | 19 ----
.../selftests/kvm/x86/sev_init2_tests.c | 13 +++
.../selftests/kvm/x86/sev_smoke_test.c | 75 +++++++++------
12 files changed, 261 insertions(+), 60 deletions(-)
--
2.43.0
5 months, 3 weeks
- 4
- 20
[PATCH v14 net-next 0/5] DUALPI2 patch
by chia-yu.chang＠nokia-bell-labs.com
From: Chia-Yu Chang <chia-yu.chang(a)nokia-bell-labs.com>
Hello,
Please find the DualPI2 patch v14.
v14 (05-May-2025)
- Modify tc.yaml: (1) Replace flags with enum and remove enum-as-flags, (2) Remove credit-queue in xstats, and (3) Change attribute types (Donald Hunter <donald.hun
- Add enum and fix the ordering of variables in pkt_sched.h to align with the modified tc.yaml (Donald Hunter <donald.hunter(a)gmail.com>)
- Add validators for DROP_OVERLOAD, DROP_EARLY, ECN_MASK, and SPLIT_GSO in sch_dualpi2.c (Donald Hunter <donald.hunter(a)gmail.com>)
- Update dualpi2.json to align with the updated variable order in pkt_sched.h.
- Reorder patches (Donald Hunter <donald.hunter(a)gmail.com>)
v13 (26-Apr-2025)
- Use dashes in member names to follow YNL conventions in tc.yaml (Donald Hunter <donald.hunter(a)gmail.com>)
- Define enumerations separately for flags of drop-early, drop-overload, ecn-mask, credit-queue in tc.yaml (Donald Hunter <donald.hunter(a)gmail.com>)
- Change the types of split-gso and step-packets into flag in tc.yaml (Donald Hunter <donald.hunter(a)gmail.com>)
- Revert to u32/u8 types for tc-dualpi2-xstats members in tc.yaml (Donald Hunter <donald.hunter(a)gmail.com>)
- Add new test cases in tc-tests/qdiscs/dualpi2.json to cover all dualpi2 paramters (Donald Hunter <donald.hunter(a)gmail.com>)
- Change the type of TCA_DUALPI2_STEP_PACKETS into NLA_FLAG (Donald Hunter <donald.hunter(a)gmail.com>)
v12 (22-Apr-2025)
- Remove anonymous struct in sch_dualpi2.c (Paolo Abeni <pabeni(a)redhat.com>)
- Replace u32/u8 with uint and s32 with int in tc spec document (Paolo Abeni <pabeni(a)redhat.com>)
- Introduce get_memory_limit function to handle potential overflow when multipling limit with MTU (Paolo Abeni <pabeni(a)redhat.com>)
- Double the packet length to further include packet overhead in memory_limit (Paolo Abeni <pabeni(a)redhat.com>)
- Remove the check of qdisc_qlen(sch) when calling qdisc_tree_reduce_backlog (Paolo Abeni <pabeni(a)redhat.com>)
v11 (15-Apr-2025)
- Replace hstimer_init with hstimer_setup in sch_dualpi2.c
v10 (25-Mar-2025)
- Remove leftover include in include/linux/netdevice.h and anonymous struct in sch_dualpi2.c (Paolo Abeni <pabeni(a)redhat.com>)
- Use kfree_skb_reason() and add SKB_DROP_REASON_DUALPI2_STEP_DROP drop reason (Paolo Abeni <pabeni(a)redhat.com>)
- Split sch_dualpi2.c into 3 patches (and overall 5 patches): Struct definition & parsing, Dump stats & configuration, Enqueue/Dequeue (Paolo Abeni <pabeni(a)redhat.com>)
v9 (16-Mar-2025)
- Fix mem_usage error in previous version
- Add min_qlen_step to the dualpi2 attribute as the minimum queue length in number of packets in the L-queue to start step threshold marking.
In previous versions, this value was fixed to 2, so the step threshold was applied to mark packets in the L queue only when the queue length of the L queue was greater than or equal to 2 packets.
This will cause larger queuing delays for L4S traffic at low rates (<20Mbps). So we parameterize it and change the default value to 0.
Comparison of tcp_1down run 'HTB 20Mbit + DUALPI2 + 10ms base delay'
Old versions:
avg median # data pts
Ping (ms) ICMP : 11.55 11.70 ms 350
TCP upload avg : 18.96 N/A Mbits/s 350
TCP upload sum : 18.96 N/A Mbits/s 350
New version (v9):
avg median # data pts
Ping (ms) ICMP : 10.81 10.70 ms 350
TCP upload avg : 18.91 N/A Mbits/s 350
TCP upload sum : 18.91 N/A Mbits/s 350
Comparison of tcp_1down run 'HTB 10Mbit + DUALPI2 + 10ms base delay'
Old versions:
avg median # data pts
Ping (ms) ICMP : 12.61 12.80 ms 350
TCP upload avg : 9.48 N/A Mbits/s 350
TCP upload sum : 9.48 N/A Mbits/s 350
New version (v9):
avg median # data pts
Ping (ms) ICMP : 11.06 10.80 ms 350
TCP upload avg : 9.43 N/A Mbits/s 350
TCP upload sum : 9.43 N/A Mbits/s 350
Comparison of tcp_1down run 'HTB 10Mbit + DUALPI2 + 10ms base delay'
Old versions:
avg median # data pts
Ping (ms) ICMP : 40.86 37.45 ms 350
TCP upload avg : 0.88 N/A Mbits/s 350
TCP upload sum : 0.88 N/A Mbits/s 350
TCP upload::1 : 0.88 0.97 Mbits/s 350
New version (v9):
avg median # data pts
Ping (ms) ICMP : 11.07 10.40 ms 350
TCP upload avg : 0.55 N/A Mbits/s 350
TCP upload sum : 0.55 N/A Mbits/s 350
TCP upload::1 : 0.55 0.59 Mbits/s 350
v8 (11-Mar-2025)
- Fix warning messages in v7
v7 (07-Mar-2025)
- Separate into 3 patches to avoid mixing changes of documentation, selftest, and code. (Cong Wang <xiyou.wangcong(a)gmail.com>)
v6 (04-Mar-2025)
- Add modprobe for dulapi2 in tc-testing script tc-testing/tdc.sh (Jakub Kicinski <kuba(a)kernel.org>)
- Update test cases in dualpi2.json
- Update commit message
v5 (22-Feb-2025)
- A comparison was done between MQ + DUALPI2, MQ + FQ_PIE, MQ + FQ_CODEL:
Unshaped 1gigE with 4 download streams test:
- Summary of tcp_4down run 'MQ + FQ_CODEL':
avg median # data pts
Ping (ms) ICMP : 1.19 1.34 ms 349
TCP download avg : 235.42 N/A Mbits/s 349
TCP download sum : 941.68 N/A Mbits/s 349
TCP download::1 : 235.19 235.39 Mbits/s 349
TCP download::2 : 235.03 235.35 Mbits/s 349
TCP download::3 : 236.89 235.44 Mbits/s 349
TCP download::4 : 234.57 235.19 Mbits/s 349
- Summary of tcp_4down run 'MQ + FQ_PIE'
avg median # data pts
Ping (ms) ICMP : 1.21 1.37 ms 350
TCP download avg : 235.42 N/A Mbits/s 350
TCP download sum : 941.61 N/A Mbits/s 350
TCP download::1 : 232.54 233.13 Mbits/s 350
TCP download::2 : 232.52 232.80 Mbits/s 350
TCP download::3 : 233.14 233.78 Mbits/s 350
TCP download::4 : 243.41 241.48 Mbits/s 350
- Summary of tcp_4down run 'MQ + DUALPI2'
avg median # data pts
Ping (ms) ICMP : 1.19 1.34 ms 349
TCP download avg : 235.42 N/A Mbits/s 349
TCP download sum : 941.68 N/A Mbits/s 349
TCP download::1 : 235.19 235.39 Mbits/s 349
TCP download::2 : 235.03 235.35 Mbits/s 349
TCP download::3 : 236.89 235.44 Mbits/s 349
TCP download::4 : 234.57 235.19 Mbits/s 349
Unshaped 1gigE with 128 download streams test:
- Summary of tcp_128down run 'MQ + FQ_CODEL':
avg median # data pts
Ping (ms) ICMP : 1.88 1.86 ms 350
TCP download avg : 7.39 N/A Mbits/s 350
TCP download sum : 946.47 N/A Mbits/s 350
- Summary of tcp_128down run 'MQ + FQ_PIE':
avg median # data pts
Ping (ms) ICMP : 1.88 1.86 ms 350
TCP download avg : 7.39 N/A Mbits/s 350
TCP download sum : 946.47 N/A Mbits/s 350
- Summary of tcp_128down run 'MQ + DUALPI2':
avg median # data pts
Ping (ms) ICMP : 1.88 1.86 ms 350
TCP download avg : 7.39 N/A Mbits/s 350
TCP download sum : 946.47 N/A Mbits/s 350
Unshaped 10gigE with 4 download streams test:
- Summary of tcp_4down run 'MQ + FQ_CODEL':
avg median # data pts
Ping (ms) ICMP : 0.22 0.23 ms 350
TCP download avg : 2354.08 N/A Mbits/s 350
TCP download sum : 9416.31 N/A Mbits/s 350
TCP download::1 : 2353.65 2352.81 Mbits/s 350
TCP download::2 : 2354.54 2354.21 Mbits/s 350
TCP download::3 : 2353.56 2353.78 Mbits/s 350
TCP download::4 : 2354.56 2354.45 Mbits/s 350
- Summary of tcp_4down run 'MQ + FQ_PIE':
avg median # data pts
Ping (ms) ICMP : 0.20 0.19 ms 350
TCP download avg : 2354.76 N/A Mbits/s 350
TCP download sum : 9419.04 N/A Mbits/s 350
TCP download::1 : 2354.77 2353.89 Mbits/s 350
TCP download::2 : 2353.41 2354.29 Mbits/s 350
TCP download::3 : 2356.18 2354.19 Mbits/s 350
TCP download::4 : 2354.68 2353.15 Mbits/s 350
- Summary of tcp_4down run 'MQ + DUALPI2':
avg median # data pts
Ping (ms) ICMP : 0.24 0.24 ms 350
TCP download avg : 2354.11 N/A Mbits/s 350
TCP download sum : 9416.43 N/A Mbits/s 350
TCP download::1 : 2354.75 2353.93 Mbits/s 350
TCP download::2 : 2353.15 2353.75 Mbits/s 350
TCP download::3 : 2353.49 2353.72 Mbits/s 350
TCP download::4 : 2355.04 2353.73 Mbits/s 350
Unshaped 10gigE with 128 download streams test:
- Summary of tcp_128down run 'MQ + FQ_CODEL':
avg median # data pts
Ping (ms) ICMP : 7.57 8.69 ms 350
TCP download avg : 73.97 N/A Mbits/s 350
TCP download sum : 9467.82 N/A Mbits/s 350
- Summary of tcp_128down run 'MQ + FQ_PIE':
avg median # data pts
Ping (ms) ICMP : 7.82 8.91 ms 350
TCP download avg : 73.97 N/A Mbits/s 350
TCP download sum : 9468.42 N/A Mbits/s 350
- Summary of tcp_128down run 'MQ + DUALPI2':
avg median # data pts
Ping (ms) ICMP : 6.87 7.93 ms 350
TCP download avg : 73.95 N/A Mbits/s 350
TCP download sum : 9465.87 N/A Mbits/s 350
From the results shown above, we see small differences between combinations.
- Update commit message to include results of no_split_gso and split_gso (Dave Taht <dave.taht(a)gmail.com> and Paolo Abeni <pabeni(a)redhat.com>)
- Add memlimit in the dualpi2 attribute, and add memory_used, max_memory_used, memory_limit in dualpi2 stats (Dave Taht <dave.taht(a)gmail.com>)
- Update note in sch_dualpi2.c related to BBRv3 status (Dave Taht <dave.taht(a)gmail.com>)
- Update license identifier (Dave Taht <dave.taht(a)gmail.com>)
- Add selftest in tools/testing/selftests/tc-testing (Cong Wang <xiyou.wangcong(a)gmail.com>)
- Use netlink policies for parameter checks (Jamal Hadi Salim <jhs(a)mojatatu.com>)
- Modify texts & fix typos in Documentation/netlink/specs/tc.yaml (Dave Taht <dave.taht(a)gmail.com>)
- Add descriptions of packet counter statistics and the reset function of sch_dualpi2.c
- Fix step_thresh in packets
- Update code comments in sch_dualpi2.c
v4 (22-Oct-2024)
- Update statement in Kconfig for DualPI2 (Stephen Hemminger <stephen(a)networkplumber.org>)
- Put a blank line after #define in sch_dualpi2.c (Stephen Hemminger <stephen(a)networkplumber.org>)
- Fix line length warning.
v3 (19-Oct-2024)
- Fix compilaiton error
- Update Documentation/netlink/specs/tc.yaml (Jakub Kicinski <kuba(a)kernel.org>)
v2 (18-Oct-2024)
- Add Documentation/netlink/specs/tc.yaml (Jakub Kicinski <kuba(a)kernel.org>)
- Use dualpi2 instead of skb prefix (Jamal Hadi Salim <jhs(a)mojatatu.com>)
- Replace nla_parse_nested_deprecated with nla_parse_nested (Jamal Hadi Salim <jhs(a)mojatatu.com>)
- Fix line length warning
For more details of DualPI2, please refer IETF RFC9332 (https://datatracker.ietf.org/doc/html/rfc9332).
Best regards,
Chia-Yu
Chia-Yu Chang (4):
sched: Struct definition and parsing of dualpi2 qdisc
sched: Dump configuration and statistics of dualpi2 qdisc
selftests/tc-testing: Add selftests for qdisc DualPI2
Documentation: netlink: specs: tc: Add DualPI2 specification
Koen De Schepper (1):
sched: Add enqueue/dequeue of dualpi2 qdisc
Documentation/netlink/specs/tc.yaml | 153 +++
include/net/dropreason-core.h | 6 +
include/uapi/linux/pkt_sched.h | 67 +
net/sched/Kconfig | 12 +
net/sched/Makefile | 1 +
net/sched/sch_dualpi2.c | 1109 +++++++++++++++++
tools/testing/selftests/tc-testing/config | 1 +
.../tc-testing/tc-tests/qdiscs/dualpi2.json | 254 ++++
tools/testing/selftests/tc-testing/tdc.sh | 1 +
9 files changed, 1604 insertions(+)
create mode 100644 net/sched/sch_dualpi2.c
create mode 100644 tools/testing/selftests/tc-testing/tc-tests/qdiscs/dualpi2.json
--
2.34.1
5 months, 3 weeks
- 2
- 6
[PATCH net-next v3] selftests/vsock: add initial vmtest.sh for vsock
by Bobby Eshleman
This commit introduces a new vmtest.sh runner for vsock.
It uses virtme-ng/qemu to run tests in a VM. The tests validate G2H,
H2G, and loopback. The testing tools from tools/testing/vsock/ are
reused. Currently, only vsock_test is used.
VMCI and hyperv support is automatically built, though not used.
Only tested on x86.
To run:
$ tools/testing/selftests/vsock/vmtest.sh
or
$ make -C tools/testing/selftests TARGETS=vsock run_tests
Results:
# linux/tools/testing/selftests/vsock/vmtest.log
setup: Building kernel and tests
setup: Booting up VM
setup: VM booted up
test:vm_server_host_client:guest: Control socket listening on 0.0.0.0:51000
test:vm_server_host_client:guest: Control socket connection accepted...
[...]
test:vm_loopback:guest: 30 - SOCK_STREAM retry failed connect()...ok
test:vm_loopback:guest: 31 - SOCK_STREAM SO_LINGER null-ptr-deref...ok
test:vm_loopback:guest: 31 - SOCK_STREAM SO_LINGER null-ptr-deref...ok
Future work can include vsock_diag_test.
vmtest.sh is loosely based off of tools/testing/selftests/net/pmtu.sh,
which was picked out of the bag of tests I knew to work with NIPA.
Because vsock requires a VM to test anything other than loopback, this
patch adds vmtest.sh as a kselftest itself. This is different than other
systems that have a "vmtest.sh", where it is used as a utility script to
spin up a VM to run the selftests as a guest (but isn't hooked into
kselftest). This aspect is worth review, as I'm not aware of all of the
enviroments where this would run.
Signed-off-by: Bobby Eshleman <bobbyeshleman(a)gmail.com>
---
Changes in v3:
- use common conditional syntax for checking variables
- use return value instead of global rc
- fix typo TEST_HOST_LISTENER_PORT -> TEST_HOST_PORT_LISTENER
- use SIGTERM instead of SIGKILL on cleanup
- use peer-cid=1 for loopback
- change sleep delay times into globals
- fix test_vm_loopback logging
- add test selection in arguments
- make QEMU an argument
- check that vng binary is on path
- use QEMU variable
- change <tab><backslash> to <space><backslash>
- fix hardcoded file paths
- add comment in commit msg about script that vmtest.sh was based off of
- Add tools/testing/selftest/vsock/Makefile for kselftest
- Link to v2: https://lore.kernel.org/r/20250417-vsock-vmtest-v2-1-3901a27331e8@gmail.com
Changes in v2:
- add kernel oops and warnings checker
- change testname variable to use FUNCNAME
- fix spacing in test_vm_server_host_client
- add -s skip build option to vmtest.sh
- add test_vm_loopback
- pass port to vm_wait_for_listener
- fix indentation in vmtest.sh
- add vmci and hyperv to config
- changed whitespace from tabs to spaces in help string
- Link to v1: https://lore.kernel.org/r/20250410-vsock-vmtest-v1-1-f35a81dab98c@gmail.com
---
MAINTAINERS | 1 +
tools/testing/selftests/vsock/.gitignore | 1 +
tools/testing/selftests/vsock/Makefile | 9 +
tools/testing/selftests/vsock/config.vsock | 10 +
tools/testing/selftests/vsock/settings | 1 +
tools/testing/selftests/vsock/vmtest.sh | 354 +++++++++++++++++++++++++++++
6 files changed, 376 insertions(+)
diff --git a/MAINTAINERS b/MAINTAINERS
index 657a67f9031ef7798c19ac63e6383d4cb18a9e1f..3fbdd7bbfce7196a3cc7db70203317c6bd0e51fd 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -25751,6 +25751,7 @@ F: include/uapi/linux/vm_sockets.h
F: include/uapi/linux/vm_sockets_diag.h
F: include/uapi/linux/vsockmon.h
F: net/vmw_vsock/
+F: tools/testing/selftests/vsock/
F: tools/testing/vsock/
VMALLOC
diff --git a/tools/testing/selftests/vsock/.gitignore b/tools/testing/selftests/vsock/.gitignore
new file mode 100644
index 0000000000000000000000000000000000000000..1950aa8ac68c0831c12c1aaa429da45bbe41e60f
--- /dev/null
+++ b/tools/testing/selftests/vsock/.gitignore
@@ -0,0 +1 @@
+vsock_selftests.log
diff --git a/tools/testing/selftests/vsock/Makefile b/tools/testing/selftests/vsock/Makefile
new file mode 100644
index 0000000000000000000000000000000000000000..6fded8c4d593541a6f7462147bffcb719def378f
--- /dev/null
+++ b/tools/testing/selftests/vsock/Makefile
@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: GPL-2.0
+.PHONY: all
+all:
+
+TEST_PROGS := vmtest.sh
+EXTRA_CLEAN := vmtest.log
+
+include ../lib.mk
+
diff --git a/tools/testing/selftests/vsock/config.vsock b/tools/testing/selftests/vsock/config.vsock
new file mode 100644
index 0000000000000000000000000000000000000000..9e0fb2270e6a2fc0beb5f0d9f0bc37158d0a9d23
--- /dev/null
+++ b/tools/testing/selftests/vsock/config.vsock
@@ -0,0 +1,10 @@
+CONFIG_VSOCKETS=y
+CONFIG_VSOCKETS_DIAG=y
+CONFIG_VSOCKETS_LOOPBACK=y
+CONFIG_VMWARE_VMCI_VSOCKETS=y
+CONFIG_VIRTIO_VSOCKETS=y
+CONFIG_VIRTIO_VSOCKETS_COMMON=y
+CONFIG_HYPERV_VSOCKETS=y
+CONFIG_VMWARE_VMCI=y
+CONFIG_VHOST_VSOCK=y
+CONFIG_HYPERV=y
diff --git a/tools/testing/selftests/vsock/settings b/tools/testing/selftests/vsock/settings
new file mode 100644
index 0000000000000000000000000000000000000000..e7b9417537fbc4626153b72e8f295ab4594c844b
--- /dev/null
+++ b/tools/testing/selftests/vsock/settings
@@ -0,0 +1 @@
+timeout=0
diff --git a/tools/testing/selftests/vsock/vmtest.sh b/tools/testing/selftests/vsock/vmtest.sh
new file mode 100755
index 0000000000000000000000000000000000000000..d70b9446e531d6d20beb24ddeda2cf0a9f7e9a39
--- /dev/null
+++ b/tools/testing/selftests/vsock/vmtest.sh
@@ -0,0 +1,354 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+#
+# Copyright (c) 2025 Meta Platforms, Inc. and affiliates
+#
+# Dependencies:
+# * virtme-ng
+# * busybox-static (used by virtme-ng)
+# * qemu (used by virtme-ng)
+
+SCRIPT_DIR="$(cd -P -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd -P)"
+KERNEL_CHECKOUT=$(realpath ${SCRIPT_DIR}/../../../..)
+QEMU=$(command -v qemu-system-$(uname -m))
+VERBOSE=0
+SKIP_BUILD=0
+VSOCK_TEST=${KERNEL_CHECKOUT}/tools/testing/vsock/vsock_test
+
+TEST_GUEST_PORT=51000
+TEST_HOST_PORT=50000
+TEST_HOST_PORT_LISTENER=50001
+SSH_GUEST_PORT=22
+SSH_HOST_PORT=2222
+VSOCK_CID=1234
+WAIT_PERIOD=3
+WAIT_PERIOD_MAX=20
+
+QEMU_PIDFILE=/tmp/qemu.pid
+
+# virtme-ng offers a netdev for ssh when using "--ssh", but we also need a
+# control port forwarded for vsock_test. Because virtme-ng doesn't support
+# adding an additional port to forward to the device created from "--ssh" and
+# virtme-init mistakenly sets identical IPs to the ssh device and additional
+# devices, we instead opt out of using --ssh, add the device manually, and also
+# add the kernel cmdline options that virtme-init uses to setup the interface.
+QEMU_OPTS=""
+QEMU_OPTS="${QEMU_OPTS} -netdev user,id=n0,hostfwd=tcp::${TEST_HOST_PORT}-:${TEST_GUEST_PORT}"
+QEMU_OPTS="${QEMU_OPTS},hostfwd=tcp::${SSH_HOST_PORT}-:${SSH_GUEST_PORT}"
+QEMU_OPTS="${QEMU_OPTS} -device virtio-net-pci,netdev=n0"
+QEMU_OPTS="${QEMU_OPTS} -device vhost-vsock-pci,guest-cid=${VSOCK_CID}"
+QEMU_OPTS="${QEMU_OPTS} --pidfile ${QEMU_PIDFILE}"
+KERNEL_CMDLINE="virtme.dhcp net.ifnames=0 biosdevname=0 virtme.ssh virtme_ssh_user=$USER"
+
+LOG=${SCRIPT_DIR}/vmtest.log
+
+# Name Description
+avail_tests="
+ vm_server_host_client Run vsock_test in server mode on the VM and in client mode on the host.
+ vm_client_host_server Run vsock_test in client mode on the VM and in server mode on the host.
+ vm_loopback Run vsock_test using the loopback transport in the VM.
+"
+
+usage() {
+ echo
+ echo "$0 [OPTIONS] [TEST]..."
+ echo "If no TEST argument is given, all tests will be run."
+ echo
+ echo "Options"
+ echo " -v: verbose output"
+ echo " -s: skip build"
+ echo
+ echo "Available tests${avail_tests}"
+ exit 1
+}
+
+die() {
+ echo "$*" >&2
+ exit 1
+}
+
+vm_ssh() {
+ ssh -q -o UserKnownHostsFile=/dev/null -p 2222 localhost $*
+ return $?
+}
+
+cleanup() {
+ if [[ -f "${QEMU_PIDFILE}" ]]; then
+ pkill -SIGTERM -F ${QEMU_PIDFILE} 2>&1 >/dev/null
+ fi
+}
+
+build() {
+ log_setup "Building kernel and tests"
+
+ pushd ${KERNEL_CHECKOUT} >/dev/null
+ vng \
+ --kconfig \
+ --config ${KERNEL_CHECKOUT}/tools/testing/selftests/vsock/config.vsock
+ make -j$(nproc)
+ make -C ${KERNEL_CHECKOUT}/tools/testing/vsock
+ popd >/dev/null
+ echo
+}
+
+vm_setup() {
+ local VNG_OPTS=""
+ if [[ "${VERBOSE}" = 1 ]]; then
+ VNG_OPTS="--verbose"
+ fi
+ vng \
+ $VNG_OPTS \
+ --run ${KERNEL_CHECKOUT} \
+ --qemu-opts="${QEMU_OPTS}" \
+ --qemu="${QEMU}" \
+ --user root \
+ --append "${KERNEL_CMDLINE}" \
+ --rw 2>&1 >/dev/null &
+}
+
+vm_wait_for_ssh() {
+ i=0
+ while [[ true ]]; do
+ if [[ ${i} > ${WAIT_PERIOD_MAX} ]]; then
+ die "Timed out waiting for guest ssh"
+ fi
+ vm_ssh -- true
+ if [[ $? -eq 0 ]]; then
+ break
+ fi
+ i=$(( i + 1 ))
+ sleep ${WAIT_PERIOD}
+ done
+}
+
+wait_for_listener() {
+ local PORT=$1
+ local i=0
+ while ! ss -ltn | grep -q ":${PORT}"; do
+ if [[ ${i} > ${WAIT_PERIOD_MAX} ]]; then
+ die "Timed out waiting for listener on port ${PORT}"
+ fi
+ i=$(( i + 1 ))
+ sleep ${WAIT_PERIOD}
+ done
+}
+
+vm_wait_for_listener() {
+ local port=$1
+ vm_ssh -- "$(declare -f wait_for_listener); wait_for_listener ${port}"
+}
+
+host_wait_for_listener() {
+ wait_for_listener ${TEST_HOST_PORT_LISTENER}
+}
+
+log() {
+ local prefix="$1"
+ shift
+
+ if [[ "$#" -eq 0 ]]; then
+ cat | awk '{ printf "%s:\t%s\n","'"${prefix}"'", $0 }' | tee -a ${LOG}
+ else
+ echo "$*" | awk '{ printf "%s:\t%s\n","'"${prefix}"'", $0 }' | tee -a ${LOG}
+ fi
+}
+
+log_setup() {
+ log "setup" "$@"
+}
+
+log_host() {
+ testname=$1
+ shift
+ log "test:${testname}:host" "$@"
+}
+
+log_guest() {
+ testname=$1
+ shift
+ log "test:${testname}:guest" "$@"
+}
+
+test_vm_server_host_client() {
+ local testname="${FUNCNAME[0]#test_}"
+
+ vm_ssh -- "${VSOCK_TEST}" \
+ --mode=server \
+ --control-port="${TEST_GUEST_PORT}" \
+ --peer-cid=2 \
+ 2>&1 | log_guest "${testname}" &
+
+ vm_wait_for_listener ${TEST_GUEST_PORT}
+
+ ${VSOCK_TEST} \
+ --mode=client \
+ --control-host=127.0.0.1 \
+ --peer-cid="${VSOCK_CID}" \
+ --control-port="${TEST_HOST_PORT}" 2>&1 | log_host "${testname}"
+
+ return $?
+}
+
+test_vm_client_host_server() {
+ local testname="${FUNCNAME[0]#test_}"
+
+ ${VSOCK_TEST} \
+ --mode "server" \
+ --control-port "${TEST_HOST_PORT_LISTENER}" \
+ --peer-cid "${VSOCK_CID}" 2>&1 | log_host "${testname}" &
+
+ host_wait_for_listener
+
+ vm_ssh -- "${VSOCK_TEST}" \
+ --mode=client \
+ --control-host=10.0.2.2 \
+ --peer-cid=2 \
+ --control-port="${TEST_HOST_PORT_LISTENER}" 2>&1 | log_guest "${testname}"
+
+ return $?
+}
+
+test_vm_loopback() {
+ local testname="${FUNCNAME[0]#test_}"
+ local port=60000 # non-forwarded local port
+
+ vm_ssh -- ${VSOCK_TEST} \
+ --mode=server \
+ --control-port="${port}" \
+ --peer-cid=1 2>&1 | log_guest "${testname}" &
+
+ vm_wait_for_listener ${port}
+
+ vm_ssh -- ${VSOCK_TEST} \
+ --mode=client \
+ --control-host="127.0.0.1" \
+ --control-port="${port}" \
+ --peer-cid=1 2>&1 | log_guest "${testname}"
+
+ return $?
+}
+
+run_test() {
+ unset IFS
+ local host_oops_cnt_before
+ local host_warn_cnt_before
+ local vm_oops_cnt_before
+ local vm_warn_cnt_before
+ local host_oops_cnt_after
+ local host_warn_cnt_after
+ local vm_oops_cnt_after
+ local vm_warn_cnt_after
+ local name
+ local rc
+
+ host_oops_cnt_before=$(dmesg | grep -c -i 'Oops')
+ host_warn_cnt_before=$(dmesg --level=warn | wc -l)
+ vm_oops_cnt_before=$(vm_ssh -- dmesg | grep -c -i 'Oops')
+ vm_warn_cnt_before=$(vm_ssh -- dmesg --level=warn | wc -l)
+
+ name=$(echo "${1}" | awk '{ print $1 }')
+ eval test_"${name}"
+
+ host_oops_cnt_after=$(dmesg | grep -i 'Oops' | wc -l)
+ if [[ ${host_oops_cnt_after} > ${host_oops_cnt_before} ]]; then
+ echo "${name}: kernel oops detected on host" | log_host ${name}
+ rc=1
+ fi
+
+ host_warn_cnt_after=$(dmesg --level=warn | wc -l)
+ if [[ ${host_warn_cnt_after} > ${host_warn_cnt_before} ]]; then
+ echo "${name}: kernel warning detected on host" | log_host ${name}
+ rc=1
+ fi
+
+ vm_oops_cnt_after=$(vm_ssh -- dmesg | grep -i 'Oops' | wc -l)
+ if [[ ${vm_oops_cnt_after} > ${vm_oops_cnt_before} ]]; then
+ echo "${name}: kernel oops detected on vm" | log_host ${name}
+ rc=1
+ fi
+
+ vm_warn_cnt_after=$(vm_ssh -- dmesg --level=warn | wc -l)
+ if [[ ${vm_warn_cnt_after} > ${vm_warn_cnt_before} ]]; then
+ echo "${name}: kernel warning detected on vm" | log_host ${name}
+ rc=1
+ fi
+
+ return ${rc}
+}
+
+while getopts :hvsq: o
+do
+ case $o in
+ v) VERBOSE=1;;
+ s) SKIP_BUILD=1;;
+ q) QEMU=$OPTARG;;
+ h|*) usage;;
+ esac
+done
+shift $((OPTIND-1))
+
+trap cleanup EXIT
+
+if [[ ! -x "$(command -v vng)" ]]; then
+ die "vng not found."
+fi
+
+if [[ ! -x "${QEMU}" ]]; then
+ die "${QEMU} not found."
+fi
+
+rm -f "${LOG}"
+if [[ "${SKIP_BUILD}" != 1 ]]; then
+ build
+fi
+log_setup "Booting up VM"
+vm_setup
+vm_wait_for_ssh
+log_setup "VM booted up"
+
+for arg in "$@"; do
+ if ! command -v > /dev/null "test_${arg}"; then
+ echo "Test ${arg} not found"
+ die "${usage}"
+ fi
+done
+
+IFS="
+"
+cnt=0
+name=""
+desc=""
+for t in ${avail_tests}; do
+ [ "${name}" = "" ] && name="${t}" && continue
+ # desc is unused, but we need to eat it.
+ [ "${desc}" = "" ] && desc="${t}"
+
+ run_this=0
+ if [[ "${#}" -eq 0 ]]; then
+ run_this=1
+ else
+ for arg in "$@"; do
+ if [[ "${arg}" = "${name}" ]]; then
+ run_this=1
+ fi
+ done
+ fi
+
+ if [[ "${run_this}" = 1 ]]; then
+ run_test "${name}"
+ rc=$?
+ if [[ ${rc} != 0 ]]; then
+ cnt=$(( cnt + 1 ))
+ fi
+ fi
+ name=""
+ desc=""
+done
+
+if [[ ${cnt} = 0 ]]; then
+ echo OK
+else
+ echo FAILED: ${cnt}
+fi
+echo "Log: ${LOG}"
+exit ${cnt}
---
base-commit: 8066e388be48f1ad62b0449dc1d31a25489fa12a
change-id: 20250325-vsock-vmtest-b3a21d2102c2
Best regards,
--
Bobby Eshleman <bobbyeshleman(a)gmail.com>
5 months, 3 weeks
- 3
- 6
[RFC PATCH 00/11] New KVM ioctl to link a gmem inode to a new gmem file
by Ackerley Tng
Hello,
This patchset builds upon the code at
https://lore.kernel.org/lkml/20230718234512.1690985-1-seanjc@google.com/T/.
This code is available at
https://github.com/googleprodkernel/linux-cc/tree/kvm-gmem-link-migrate-rfc….
In guest_mem v11, a split file/inode model was proposed, where memslot
bindings belong to the file and pages belong to the inode. This model
lends itself well to having different VMs use separate files pointing
to the same inode.
This RFC proposes an ioctl, KVM_LINK_GUEST_MEMFD, that takes a VM and
a gmem fd, and returns another gmem fd referencing a different file
and associated with VM. This RFC also includes an update to
KVM_CAP_VM_MOVE_ENC_CONTEXT_FROM to migrate memory context
(slot->arch.lpage_info and kvm->mem_attr_array) from source to
destination vm, intra-host.
Intended usage of the two ioctls:
1. Source VM’s fd is passed to destination VM via unix sockets
2. Destination VM uses new ioctl KVM_LINK_GUEST_MEMFD to link source
VM’s fd to a new fd.
3. Destination VM will pass new fds to KVM_SET_USER_MEMORY_REGION,
which will bind the new file, pointing to the same inode that the
source VM’s file points to, to memslots
4. Use KVM_CAP_VM_MOVE_ENC_CONTEXT_FROM to move kvm->mem_attr_array
and slot->arch.lpage_info to the destination VM.
5. Run the destination VM as per normal
Some other approaches considered were:
+ Using the linkat() syscall, but that requires a mount/directory for
a source fd to be linked to
+ Using the dup() syscall, but that only duplicates the fd, and both
fds point to the same file
---
Ackerley Tng (11):
KVM: guest_mem: Refactor out kvm_gmem_alloc_file()
KVM: guest_mem: Add ioctl KVM_LINK_GUEST_MEMFD
KVM: selftests: Add tests for KVM_LINK_GUEST_MEMFD ioctl
KVM: selftests: Test transferring private memory to another VM
KVM: x86: Refactor sev's flag migration_in_progress to kvm struct
KVM: x86: Refactor common code out of sev.c
KVM: x86: Refactor common migration preparation code out of
sev_vm_move_enc_context_from
KVM: x86: Let moving encryption context be configurable
KVM: x86: Handle moving of memory context for intra-host migration
KVM: selftests: Generalize migration functions from
sev_migrate_tests.c
KVM: selftests: Add tests for migration of private mem
arch/x86/include/asm/kvm_host.h | 4 +-
arch/x86/kvm/svm/sev.c | 85 ++-----
arch/x86/kvm/svm/svm.h | 3 +-
arch/x86/kvm/x86.c | 221 +++++++++++++++++-
arch/x86/kvm/x86.h | 6 +
include/linux/kvm_host.h | 18 ++
include/uapi/linux/kvm.h | 8 +
tools/testing/selftests/kvm/Makefile | 1 +
.../testing/selftests/kvm/guest_memfd_test.c | 42 ++++
.../selftests/kvm/include/kvm_util_base.h | 31 +++
.../kvm/x86_64/private_mem_migrate_tests.c | 93 ++++++++
.../selftests/kvm/x86_64/sev_migrate_tests.c | 48 ++--
virt/kvm/guest_mem.c | 151 ++++++++++--
virt/kvm/kvm_main.c | 10 +
virt/kvm/kvm_mm.h | 7 +
15 files changed, 596 insertions(+), 132 deletions(-)
create mode 100644 tools/testing/selftests/kvm/x86_64/private_mem_migrate_tests.c
--
2.41.0.640.ga95def55d0-goog
5 months, 3 weeks
- 3
- 15
[PATCH] selftests: pid_namespace: Fix missing mount headers in pid_max.c
by Moon Hee Lee
Fix compilation error in pid_max.c by including <sys/mount.h> to define
mount(), umount2(), MS_PRIVATE, MS_REC, and MNT_DETACH.
The test now builds successfully.
Signed-off-by: Moon Hee Lee <moonhee.lee.ca(a)gmail.com>
---
tools/testing/selftests/pid_namespace/pid_max.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/tools/testing/selftests/pid_namespace/pid_max.c b/tools/testing/selftests/pid_namespace/pid_max.c
index 51c414faabb0..972bedc475f1 100644
--- a/tools/testing/selftests/pid_namespace/pid_max.c
+++ b/tools/testing/selftests/pid_namespace/pid_max.c
@@ -11,6 +11,7 @@
#include <string.h>
#include <syscall.h>
#include <sys/wait.h>
+#include <sys/mount.h>
#include "../kselftest_harness.h"
#include "../pidfd/pidfd.h"
--
2.43.0
5 months, 3 weeks
- 1
- 0
[PATCH] selftests/run_kselftest.sh: Use readlink if realpath is not available
by Yosry Ahmed
'realpath' is not always available, fallback to 'readlink -f' if is not
available. They seem to work equally well in this context.
Signed-off-by: Yosry Ahmed <yosry.ahmed(a)linux.dev>
---
tools/testing/selftests/run_kselftest.sh | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/run_kselftest.sh b/tools/testing/selftests/run_kselftest.sh
index 50e03eefe7ac7..0443beacf3621 100755
--- a/tools/testing/selftests/run_kselftest.sh
+++ b/tools/testing/selftests/run_kselftest.sh
@@ -3,7 +3,14 @@
#
# Run installed kselftest tests.
#
-BASE_DIR=$(realpath $(dirname $0))
+
+# Fallback to readlink if realpath is not available
+if which realpath > /dev/null; then
+ BASE_DIR=$(realpath $(dirname $0))
+else
+ BASE_DIR=$(readlink -f $(dirname $0))
+fi
+
cd $BASE_DIR
TESTS="$BASE_DIR"/kselftest-list.txt
if [ ! -r "$TESTS" ] ; then
--
2.49.0.rc1.451.g8f38331e32-goog
5 months, 3 weeks
- 2
- 3
[PATCH net-next v3] selftests: net: exit cleanly on SIGTERM / timeout
by Jakub Kicinski
ksft runner sends 2 SIGTERMs in a row if a test runs out of time.
Handle this in a similar way we handle SIGINT - cleanup and stop
running further tests.
Because we get 2 signals we need a bit of logic to ignore
the subsequent one, they come immediately one after the other
(due to commit 9616cb34b08e ("kselftest/runner.sh: Propagate SIGTERM
to runner child")).
This change makes sure we run cleanup (scheduled defer()s)
and also print a stack trace on SIGTERM, which doesn't happen
by default. Tests occasionally hang in NIPA and it's impossible
to tell what they are waiting from or doing.
Signed-off-by: Jakub Kicinski <kuba(a)kernel.org>
---
v3:
- remove unnecessary isinstance()
v2: https://lore.kernel.org/20250429170804.2649622-1-kuba@kernel.org
- remove declaration at the global scope
v1: https://lore.kernel.org/20250425151757.1652517-1-kuba@kernel.org
CC: ecree.xilinx(a)gmail.com
CC: petrm(a)nvidia.com
CC: willemb(a)google.com
CC: sdf(a)fomichev.me
CC: linux-kselftest(a)vger.kernel.org
---
tools/testing/selftests/net/lib/py/ksft.py | 24 +++++++++++++++++++++-
1 file changed, 23 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/net/lib/py/ksft.py b/tools/testing/selftests/net/lib/py/ksft.py
index 3cfad0fd4570..61287c203b6e 100644
--- a/tools/testing/selftests/net/lib/py/ksft.py
+++ b/tools/testing/selftests/net/lib/py/ksft.py
@@ -3,6 +3,7 @@
import builtins
import functools
import inspect
+import signal
import sys
import time
import traceback
@@ -26,6 +27,10 @@ KSFT_DISRUPTIVE = True
pass
+class KsftTerminate(KeyboardInterrupt):
+ pass
+
+
def ksft_pr(*objs, **kwargs):
print("#", *objs, **kwargs)
@@ -193,6 +198,17 @@ KSFT_DISRUPTIVE = True
return env
+def _ksft_intr(signum, frame):
+ # ksft runner.sh sends 2 SIGTERMs in a row on a timeout
+ # if we don't ignore the second one it will stop us from handling cleanup
+ global term_cnt
+ term_cnt += 1
+ if term_cnt == 1:
+ raise KsftTerminate()
+ else:
+ ksft_pr(f"Ignoring SIGTERM (cnt: {term_cnt}), already exiting...")
+
+
def ksft_run(cases=None, globs=None, case_pfx=None, args=()):
cases = cases or []
@@ -205,6 +221,10 @@ KSFT_DISRUPTIVE = True
cases.append(value)
break
+ global term_cnt
+ term_cnt = 0
+ prev_sigterm = signal.signal(signal.SIGTERM, _ksft_intr)
+
totals = {"pass": 0, "fail": 0, "skip": 0, "xfail": 0}
print("TAP version 13")
@@ -233,7 +253,7 @@ KSFT_DISRUPTIVE = True
for line in tb.strip().split('\n'):
ksft_pr("Exception|", line)
if stop:
- ksft_pr("Stopping tests due to KeyboardInterrupt.")
+ ksft_pr(f"Stopping tests due to {type(e).__name__}.")
KSFT_RESULT = False
cnt_key = 'fail'
@@ -248,6 +268,8 @@ KSFT_DISRUPTIVE = True
if stop:
break
+ signal.signal(signal.SIGTERM, prev_sigterm)
+
print(
f"# Totals: pass:{totals['pass']} fail:{totals['fail']} xfail:{totals['xfail']} xpass:0 skip:{totals['skip']} error:0"
)
--
2.49.0
5 months, 3 weeks
- 2
- 1
[PATCH] KVM: selftests: add test for SVE host corruption
by Mark Brown
This test program, originally written by Mark Rutland and lightly modified
by me for upstream, verifies that we do not have the issues with host SVE
state being discarded which were fixed in
fbc7e61195e2 ("KVM: arm64: Unconditionally save+flush host FPSIMD/SVE/SME state")
by running a simple VM while checking the SVE register state for
corruption.
Signed-off-by: Mark Brown <broonie(a)kernel.org>
---
tools/testing/selftests/kvm/Makefile.kvm | 1 +
tools/testing/selftests/kvm/arm64/host_sve.c | 127 +++++++++++++++++++++++++++
2 files changed, 128 insertions(+)
diff --git a/tools/testing/selftests/kvm/Makefile.kvm b/tools/testing/selftests/kvm/Makefile.kvm
index f62b0a5aba35..d37072054a3d 100644
--- a/tools/testing/selftests/kvm/Makefile.kvm
+++ b/tools/testing/selftests/kvm/Makefile.kvm
@@ -147,6 +147,7 @@ TEST_GEN_PROGS_arm64 = $(TEST_GEN_PROGS_COMMON)
TEST_GEN_PROGS_arm64 += arm64/aarch32_id_regs
TEST_GEN_PROGS_arm64 += arm64/arch_timer_edge_cases
TEST_GEN_PROGS_arm64 += arm64/debug-exceptions
+TEST_GEN_PROGS_arm64 += arm64/host_sve
TEST_GEN_PROGS_arm64 += arm64/hypercalls
TEST_GEN_PROGS_arm64 += arm64/mmio_abort
TEST_GEN_PROGS_arm64 += arm64/page_fault_test
diff --git a/tools/testing/selftests/kvm/arm64/host_sve.c b/tools/testing/selftests/kvm/arm64/host_sve.c
new file mode 100644
index 000000000000..3826772fd470
--- /dev/null
+++ b/tools/testing/selftests/kvm/arm64/host_sve.c
@@ -0,0 +1,127 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+/*
+ * Host SVE: Check FPSIMD/SVE/SME save/restore over KVM_RUN ioctls.
+ *
+ * Copyright 2025 Arm, Ltd
+ */
+
+#include <errno.h>
+#include <signal.h>
+#include <sys/auxv.h>
+#include <asm/kvm.h>
+#include <kvm_util.h>
+
+#include "ucall_common.h"
+
+static void guest_code(void)
+{
+ for (int i = 0; i < 10; i++) {
+ GUEST_UCALL_NONE();
+ }
+
+ GUEST_DONE();
+}
+
+void handle_sigill(int sig, siginfo_t *info, void *ctx)
+{
+ ucontext_t *uctx = ctx;
+
+ printf(" < host signal %d >\n", sig);
+
+ /*
+ * Skip the UDF
+ */
+ uctx->uc_mcontext.pc += 4;
+}
+
+void register_sigill_handler(void)
+{
+ struct sigaction sa = {
+ .sa_sigaction = handle_sigill,
+ .sa_flags = SA_SIGINFO,
+ };
+ sigaction(SIGILL, &sa, NULL);
+}
+
+static void do_sve_roundtrip(void)
+{
+ unsigned long before, after;
+
+ /*
+ * Set all bits in a predicate register, force a save/restore via a
+ * SIGILL (which handle_sigill() will recover from), then report
+ * whether the value has changed.
+ */
+ asm volatile(
+ " .arch_extension sve\n"
+ " ptrue p0.B\n"
+ " cntp %[before], p0, p0.B\n"
+ " udf #0\n"
+ " cntp %[after], p0, p0.B\n"
+ : [before] "=r" (before),
+ [after] "=r" (after)
+ :
+ : "p0"
+ );
+
+ if (before != after) {
+ TEST_FAIL("Signal roundtrip discarded predicate bits (%ld => %ld)\n",
+ before, after);
+ } else {
+ printf("Signal roundtrip preserved predicate bits (%ld => %ld)\n",
+ before, after);
+ }
+}
+
+static void test_run(void)
+{
+ struct kvm_vcpu *vcpu;
+ struct kvm_vm *vm;
+ struct ucall uc;
+ bool guest_done = false;
+
+ register_sigill_handler();
+
+ vm = vm_create_with_one_vcpu(&vcpu, guest_code);
+
+ do_sve_roundtrip();
+
+ while (!guest_done) {
+
+ printf("Running VCPU...\n");
+ vcpu_run(vcpu);
+
+ switch (get_ucall(vcpu, &uc)) {
+ case UCALL_NONE:
+ do_sve_roundtrip();
+ do_sve_roundtrip();
+ break;
+ case UCALL_DONE:
+ guest_done = true;
+ break;
+ case UCALL_ABORT:
+ REPORT_GUEST_ASSERT(uc);
+ break;
+ default:
+ TEST_FAIL("Unexpected guest exit");
+ }
+ }
+
+ kvm_vm_free(vm);
+}
+
+int main(void)
+{
+ /*
+ * This is testing the host environment, we don't care about
+ * guest SVE support.
+ */
+ if (!(getauxval(AT_HWCAP) & HWCAP_SVE)) {
+ printf("SVE not supported\n");
+ return KSFT_SKIP;
+ }
+
+ test_run();
+ return 0;
+}
---
base-commit: 8ffd015db85fea3e15a77027fda6c02ced4d2444
change-id: 20250226-kvm-selftest-sve-signal-1add0d9d716c
Best regards,
--
Mark Brown <broonie(a)kernel.org>
5 months, 3 weeks
- 3
- 3
[PATCH net-next v13 0/9] Device memory TCP TX
by Mina Almasry
v13: https://lore.kernel.org/netdev/20250425204743.617260-1-almasrymina@google.c…
===
Changelog:
- Fix unneeded error label pointed out by Christoph, and addressed
nitpick.
v12: https://lore.kernel.org/netdev/20250423031117.907681-1-almasrymina@google.c…
====
No changes in v12, just restored the selftests patch I accidentally dropped in
v11
v11: https://lore.kernel.org/netdev/20250423031117.907681-1-almasrymina@google.c…
====
Addressed a couple of nits and collected Acked-by from Harshitha
(thanks!)
v10: https://lore.kernel.org/netdev/20250417231540.2780723-1-almasrymina@google.…
====
Addressed comments following conversations with Pavel, Stan, and
Harshitha. Thank you guys for the reviews again. Overall minor changes:
Changelog:
- Check for !niov->pp in io_zcrx_recv_frag, just in case we end up with
a TX niov in that path (Pavel).
- Fix locking case in !netif_device_present (Jakub/Stan).
v9: https://lore.kernel.org/netdev/20250415224756.152002-1-almasrymina@google.c…
===
Changelog:
- Use priv->bindings list instead of sock_bindings_list. This was missed
during the rebase as the bindings have been updated to use
priv->bindings recently (thanks Stan!)
v8: https://lore.kernel.org/netdev/20250308214045.1160445-1-almasrymina@google.…
===
Only address minor comments on V7
Changelog:
- Use netdev locking instead of rtnl_locking to match rx path.
- Now that iouring zcrx is in net-next, use NET_IOV_IOURING instead of
NET_IOV_UNSPECIFIED.
- Post send binding to net_devmem_dmabuf_bindings after it's been fully
initialized (Stan).
v7: https://lore.kernel.org/netdev/20250227041209.2031104-1-almasrymina@google.…
===
Changelog:
- Check the dmabuf net_iov binding belongs to the device the TX is going
out on. (Jakub)
- Provide detailed inspection of callsites of
__skb_frag_ref/skb_page_unref in patch 2's changelog (Jakub)
v6: https://lore.kernel.org/netdev/20250222191517.743530-1-almasrymina@google.c…
===
v6 has no major changes. Addressed a few issues from Paolo and David,
and collected Acks from Stan. Thank you everyone for the review!
Changes:
- retain behavior to process MSG_FASTOPEN even if the provided cmsg is
invalid (Paolo).
- Rework the freeing of tx_vec slightly (it now has its own err label).
(Paolo).
- Squash the commit that makes dmabuf unbinding scheduled work into the
same one which implements the TX path so we don't run into future
errors on bisecting (Paolo).
- Fix/add comments to explain how dmabuf binding refcounting works
(David).
v5: https://lore.kernel.org/netdev/20250220020914.895431-1-almasrymina@google.c…
===
v5 has no major changes; it clears up the relatively minor issues
pointed out to in v4, and rebases the series on top of net-next to
resolve the conflict with a patch that raced to the tree. It also
collects the review tags from v4.
Changes:
- Rebase to net-next
- Fix issues in selftest (Stan).
- Address comments in the devmem and netmem driver docs (Stan and Bagas)
- Fix zerocopy_fill_skb_from_devmem return error code (Stan).
v4: https://lore.kernel.org/netdev/20250203223916.1064540-1-almasrymina@google.…
===
v4 mainly addresses the critical driver support issue surfaced in v3 by
Paolo and Stan. Drivers aiming to support netmem_tx should make sure not
to pass the netmem dma-addrs to the dma-mapping APIs, as these dma-addrs
may come from dma-bufs.
Additionally other feedback from v3 is addressed.
Major changes:
- Add helpers to handle netmem dma-addrs. Add GVE support for
netmem_tx.
- Fix binding->tx_vec not being freed on error paths during the
tx binding.
- Add a minimal devmem_tx test to devmem.py.
- Clean up everything obsolete from the cover letter (Paolo).
v3: https://patchwork.kernel.org/project/netdevbpf/list/?series=929401&state=*
===
Address minor comments from RFCv2 and fix a few build warnings and
ynl-regen issues. No major changes.
RFC v2: https://patchwork.kernel.org/project/netdevbpf/list/?series=920056&state=*
=======
RFC v2 addresses much of the feedback from RFC v1. I plan on sending
something close to this as net-next reopens, sending it slightly early
to get feedback if any.
Major changes:
--------------
- much improved UAPI as suggested by Stan. We now interpret the iov_base
of the passed in iov from userspace as the offset into the dmabuf to
send from. This removes the need to set iov.iov_base = NULL which may
be confusing to users, and enables us to send multiple iovs in the
same sendmsg() call. ncdevmem and the docs show a sample use of that.
- Removed the duplicate dmabuf iov_iter in binding->iov_iter. I think
this is good improvment as it was confusing to keep track of
2 iterators for the same sendmsg, and mistracking both iterators
caused a couple of bugs reported in the last iteration that are now
resolved with this streamlining.
- Improved test coverage in ncdevmem. Now multiple sendmsg() are tested,
and sending multiple iovs in the same sendmsg() is tested.
- Fixed issue where dmabuf unmapping was happening in invalid context
(Stan).
====================================================================
The TX path had been dropped from the Device Memory TCP patch series
post RFCv1 [1], to make that series slightly easier to review. This
series rebases the implementation of the TX path on top of the
net_iov/netmem framework agreed upon and merged. The motivation for
the feature is thoroughly described in the docs & cover letter of the
original proposal, so I don't repeat the lengthy descriptions here, but
they are available in [1].
Full outline on usage of the TX path is detailed in the documentation
included with this series.
Test example is available via the kselftest included in the series as well.
The series is relatively small, as the TX path for this feature largely
piggybacks on the existing MSG_ZEROCOPY implementation.
Patch Overview:
---------------
1. Documentation & tests to give high level overview of the feature
being added.
1. Add netmem refcounting needed for the TX path.
2. Devmem TX netlink API.
3. Devmem TX net stack implementation.
4. Make dma-buf unbinding scheduled work to handle TX cases where it gets
freed from contexts where we can't sleep.
5. Add devmem TX documentation.
6. Add scaffolding enabling driver support for netmem_tx. Add helpers, driver
feature flag, and docs to enable drivers to declare netmem_tx support.
7. Guard netmem_tx against being enabled against drivers that don't
support it.
8. Add devmem_tx selftests. Add TX path to ncdevmem and add a test to
devmem.py.
Testing:
--------
Testing is very similar to devmem TCP RX path. The ncdevmem test used
for the RX path is now augemented with client functionality to test TX
path.
* Test Setup:
Kernel: net-next with this RFC and memory provider API cherry-picked
locally.
Hardware: Google Cloud A3 VMs.
NIC: GVE with header split & RSS & flow steering support.
Performance results are not included with this version, unfortunately.
I'm having issues running the dma-buf exporter driver against the
upstream kernel on my test setup. The issues are specific to that
dma-buf exporter and do not affect this patch series. I plan to follow
up this series with perf fixes if the tests point to issues once they're
up and running.
Special thanks to Stan who took a stab at rebasing the TX implementation
on top of the netmem/net_iov framework merged. Parts of his proposal [2]
that are reused as-is are forked off into their own patches to give full
credit.
[1] https://lore.kernel.org/netdev/20240909054318.1809580-1-almasrymina@google.…
[2] https://lore.kernel.org/netdev/20240913150913.1280238-2-sdf@fomichev.me/T/#…
Cc: sdf(a)fomichev.me
Cc: asml.silence(a)gmail.com
Cc: dw(a)davidwei.uk
Cc: Jamal Hadi Salim <jhs(a)mojatatu.com>
Cc: Victor Nogueira <victor(a)mojatatu.com>
Cc: Pedro Tammela <pctammela(a)mojatatu.com>
Cc: Samiullah Khawaja <skhawaja(a)google.com>
Cc: Kuniyuki Iwashima <kuniyu(a)amazon.com>
Mina Almasry (8):
netmem: add niov->type attribute to distinguish different net_iov
types
net: add get_netmem/put_netmem support
net: devmem: Implement TX path
net: add devmem TCP TX documentation
net: enable driver support for netmem TX
gve: add netmem TX support to GVE DQO-RDA mode
net: check for driver support in netmem TX
selftests: ncdevmem: Implement devmem TCP TX
Stanislav Fomichev (1):
net: devmem: TCP tx netlink api
Documentation/netlink/specs/netdev.yaml | 12 +
Documentation/networking/devmem.rst | 150 ++++++++-
.../networking/net_cachelines/net_device.rst | 1 +
Documentation/networking/netdev-features.rst | 5 +
Documentation/networking/netmem.rst | 23 +-
drivers/net/ethernet/google/gve/gve_main.c | 3 +
drivers/net/ethernet/google/gve/gve_tx_dqo.c | 8 +-
include/linux/netdevice.h | 2 +
include/linux/skbuff.h | 17 +-
include/linux/skbuff_ref.h | 4 +-
include/net/netmem.h | 34 +-
include/net/sock.h | 1 +
include/uapi/linux/netdev.h | 1 +
io_uring/zcrx.c | 3 +-
net/core/datagram.c | 48 ++-
net/core/dev.c | 34 +-
net/core/devmem.c | 131 ++++++--
net/core/devmem.h | 83 ++++-
net/core/netdev-genl-gen.c | 13 +
net/core/netdev-genl-gen.h | 1 +
net/core/netdev-genl.c | 80 ++++-
net/core/skbuff.c | 48 ++-
net/core/sock.c | 6 +
net/ipv4/ip_output.c | 3 +-
net/ipv4/tcp.c | 50 ++-
net/ipv6/ip6_output.c | 3 +-
net/vmw_vsock/virtio_transport_common.c | 5 +-
tools/include/uapi/linux/netdev.h | 1 +
.../selftests/drivers/net/hw/devmem.py | 26 +-
.../selftests/drivers/net/hw/ncdevmem.c | 300 +++++++++++++++++-
30 files changed, 1008 insertions(+), 88 deletions(-)
base-commit: 0d15a26b247d25cd012134bf8825128fedb15cc9
--
2.49.0.901.g37484f566f-goog
5 months, 3 weeks
- 3
- 17
[PATCH net 0/3 v4] selftests: drv: net: fix `ping.py` test failure
by Mohsin Bashir
Fix `ping.py` test failure on an ipv6 system, and appropriately handle the
cases where either one of the two address families (ipv4, ipv6) is not
present.
Mohsin Bashir (3):
selftests: drv: net: fix test failure on ipv6 sys
selftests: drv: net: avoid skipping tests
selftests: drv: net: add version indicator
tools/testing/selftests/drivers/net/ping.py | 45 ++++++++++++---------
1 file changed, 27 insertions(+), 18 deletions(-)
--
2.47.1
5 months, 3 weeks
- 4
- 13
[PATCH net-next v2] selftests: iou-zcrx: Clean up build warnings for error format
by Haiyue Wang
Clean up two build warnings:
[1]
iou-zcrx.c: In function ‘process_recvzc’:
iou-zcrx.c:263:37: warning: too many arguments for format [-Wformat-extra-args]
263 | error(1, 0, "payload mismatch at ", i);
| ^~~~~~~~~~~~~~~~~~~~~~
[2] Use "%zd" for ssize_t type as better
iou-zcrx.c: In function ‘run_client’:
iou-zcrx.c:357:47: warning: format ‘%d’ expects argument of type ‘int’, but argument 4 has type ‘ssize_t’ {aka ‘long int’} [-Wformat=]
357 | error(1, 0, "send(): %d", sent);
| ~^ ~~~~
| | |
| int ssize_t {aka long int}
| %ld
Signed-off-by: Haiyue Wang <haiyuewa(a)163.com>
---
v2:
- Dont't wrap the build warning message to make scripts/checkpatch.pl happy,
keep it as for readability.
- Change the format for ssize_t from "%ld" to "%zd" as Simon suggested.
- Change the target to net-next tree.
v1: https://lore.kernel.org/netdev/20250502042240.17371-1-haiyuewa@163.com/
---
tools/testing/selftests/drivers/net/hw/iou-zcrx.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/drivers/net/hw/iou-zcrx.c b/tools/testing/selftests/drivers/net/hw/iou-zcrx.c
index 8aa426014c87..62456df947bc 100644
--- a/tools/testing/selftests/drivers/net/hw/iou-zcrx.c
+++ b/tools/testing/selftests/drivers/net/hw/iou-zcrx.c
@@ -260,7 +260,7 @@ static void process_recvzc(struct io_uring *ring, struct io_uring_cqe *cqe)
for (i = 0; i < n; i++) {
if (*(data + i) != payload[(received + i)])
- error(1, 0, "payload mismatch at ", i);
+ error(1, 0, "payload mismatch at %d", i);
}
received += n;
@@ -354,7 +354,7 @@ static void run_client(void)
chunk = min_t(ssize_t, cfg_payload_len, to_send);
res = send(fd, src, chunk, 0);
if (res < 0)
- error(1, 0, "send(): %d", sent);
+ error(1, 0, "send(): %zd", sent);
sent += res;
to_send -= res;
}
--
2.49.0
5 months, 3 weeks
- 3
- 3
[PATCH v2 0/6] Replace CONFIG_DMABUF_SYSFS_STATS with BPF
by T.J. Mercier
Until CONFIG_DMABUF_SYSFS_STATS was added [1] it was only possible to
perform per-buffer accounting with debugfs which is not suitable for
production environments. Eventually we discovered the overhead with
per-buffer sysfs file creation/removal was significantly impacting
allocation and free times, and exacerbated kernfs lock contention. [2]
dma_buf_stats_setup() is responsible for 39% of single-page buffer
creation duration, or 74% of single-page dma_buf_export() duration when
stressing dmabuf allocations and frees.
I prototyped a change from per-buffer to per-exporter statistics with a
RCU protected list of exporter allocations that accommodates most (but
not all) of our use-cases and avoids almost all of the sysfs overhead.
While that adds less overhead than per-buffer sysfs, and less even than
the maintenance of the dmabuf debugfs_list, it's still *additional*
overhead on top of the debugfs_list and doesn't give us per-buffer info.
This series uses the existing dmabuf debugfs_list to implement a BPF
dmabuf iterator, which adds no overhead to buffer allocation/free and
provides per-buffer info. The list has been moved outside of
CONFIG_DEBUG_FS scope so that it is always populated. The BPF program
loaded by userspace that extracts per-buffer information gets to define
its own interface which avoids the lack of ABI stability with debugfs.
As this is a replacement for our use of CONFIG_DMABUF_SYSFS_STATS, the
last patch is a RFC for removing it from the kernel. Please see my
suggestion there regarding the timeline for that.
[1] https://lore.kernel.org/linux-media/20201210044400.1080308-1-hridya@google.…
[2] https://lore.kernel.org/all/20220516171315.2400578-1-tjmercier@google.com
v1: https://lore.kernel.org/all/20250414225227.3642618-1-tjmercier@google.com
v1 -> v2:
Make the DMA buffer list independent of CONFIG_DEBUG_FS per Christian König
Add CONFIG_DMA_SHARED_BUFFER check to kernel/bpf/Makefile per kernel test robot
Use BTF_ID_LIST_SINGLE instead of BTF_ID_LIST_GLOBAL_SINGLE per Song Liu
Fixup comment style, mixing code/declarations, and use ASSERT_OK_FD in selftest per Song Liu
Add BPF_ITER_RESCHED feature to bpf_dmabuf_reg_info per Alexei Starovoitov
Add open-coded iterator and selftest per Alexei Starovoitov
Add a second test buffer from the system dmabuf heap to selftests
Use the BPF program we'll use in production for selftest per Alexei Starovoitov
https://r.android.com/c/platform/system/bpfprogs/+/3616123/2/dmabufIter.c
https://r.android.com/c/platform/system/memory/libmeminfo/+/3614259/1/libdm…
T.J. Mercier (6):
dma-buf: Rename and expose debugfs symbols
bpf: Add dmabuf iterator
bpf: Add open coded dmabuf iterator
selftests/bpf: Add test for dmabuf_iter
selftests/bpf: Add test for open coded dmabuf_iter
RFC: dma-buf: Remove DMA-BUF statistics
.../ABI/testing/sysfs-kernel-dmabuf-buffers | 24 --
Documentation/driver-api/dma-buf.rst | 5 -
drivers/dma-buf/Kconfig | 15 -
drivers/dma-buf/Makefile | 1 -
drivers/dma-buf/dma-buf-sysfs-stats.c | 202 --------------
drivers/dma-buf/dma-buf-sysfs-stats.h | 35 ---
drivers/dma-buf/dma-buf.c | 58 +---
include/linux/dma-buf.h | 6 +-
kernel/bpf/Makefile | 3 +
kernel/bpf/dmabuf_iter.c | 177 ++++++++++++
kernel/bpf/helpers.c | 5 +
.../testing/selftests/bpf/bpf_experimental.h | 5 +
tools/testing/selftests/bpf/config | 3 +
.../selftests/bpf/prog_tests/dmabuf_iter.c | 258 ++++++++++++++++++
.../testing/selftests/bpf/progs/dmabuf_iter.c | 91 ++++++
15 files changed, 561 insertions(+), 327 deletions(-)
delete mode 100644 Documentation/ABI/testing/sysfs-kernel-dmabuf-buffers
delete mode 100644 drivers/dma-buf/dma-buf-sysfs-stats.c
delete mode 100644 drivers/dma-buf/dma-buf-sysfs-stats.h
create mode 100644 kernel/bpf/dmabuf_iter.c
create mode 100644 tools/testing/selftests/bpf/prog_tests/dmabuf_iter.c
create mode 100644 tools/testing/selftests/bpf/progs/dmabuf_iter.c
base-commit: 0af2f6be1b4281385b618cb86ad946eded089ac8
--
2.49.0.906.g1f30a19c02-goog
5 months, 3 weeks
- 3
- 13
[PATCH net-next 0/7] selftests: mptcp: increase code coverage
by Matthieu Baerts (NGI0)
Here are various patches slightly improving MPTCP code coverage:
- Patch 1: avoid a harmless 'grep: write error' warning.
- Patch 2: use getaddrinfo() with IPPROTO_MPTCP in more places.
- Patch 3-6: prepare and add support to get info for a specific subflow
when giving the 5-tuple.
- Patch 7: validate the previous patch and cover "subflow_get_info_size"
in the kernel code (mptcp_diag.c).
Signed-off-by: Matthieu Baerts (NGI0) <matttbe(a)kernel.org>
---
Gang Yan (5):
selftests: mptcp: add struct params in mptcp_diag
selftests: mptcp: refactor send_query parameters for code clarity
selftests: mptcp: refactor NLMSG handling with 'proto'
selftests: mptcp: add helpers to get subflow_info
selftests: mptcp: add chk_sublfow in diag.sh
Geliang Tang (1):
selftests: mptcp: sockopt: use IPPROTO_MPTCP for getaddrinfo
Matthieu Baerts (NGI0) (1):
selftests: mptcp: info: hide 'grep: write error' warnings
tools/testing/selftests/net/mptcp/diag.sh | 32 +++
tools/testing/selftests/net/mptcp/mptcp_diag.c | 228 +++++++++++++++++++---
tools/testing/selftests/net/mptcp/mptcp_inq.c | 16 +-
tools/testing/selftests/net/mptcp/mptcp_lib.sh | 7 +-
tools/testing/selftests/net/mptcp/mptcp_sockopt.c | 16 +-
5 files changed, 257 insertions(+), 42 deletions(-)
---
base-commit: 630cb33ccfcd04563598d0f0edd96c94ddf3352d
change-id: 20250502-net-next-mptcp-sft-inc-cover-f5eda7035432
Best regards,
--
Matthieu Baerts (NGI0) <matttbe(a)kernel.org>
5 months, 3 weeks
- 2
- 8
[PATCH AUTOSEL 5.15 083/153] selftests/net: have `gro.sh -t` return a correct exit code
by Sasha Levin
From: Kevin Krakauer <krakauer(a)google.com>
[ Upstream commit 784e6abd99f24024a8998b5916795f0bec9d2fd9 ]
Modify gro.sh to return a useful exit code when the -t flag is used. It
formerly returned 0 no matter what.
Tested: Ran `gro.sh -t large` and verified that test failures return 1.
Signed-off-by: Kevin Krakauer <krakauer(a)google.com>
Reviewed-by: Willem de Bruijn <willemb(a)google.com>
Link: https://patch.msgid.link/20250226192725.621969-2-krakauer@google.com
Signed-off-by: Jakub Kicinski <kuba(a)kernel.org>
Signed-off-by: Sasha Levin <sashal(a)kernel.org>
---
tools/testing/selftests/net/gro.sh | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/net/gro.sh b/tools/testing/selftests/net/gro.sh
index 342ad27f631b1..e771f5f7faa26 100755
--- a/tools/testing/selftests/net/gro.sh
+++ b/tools/testing/selftests/net/gro.sh
@@ -95,5 +95,6 @@ trap cleanup EXIT
if [[ "${test}" == "all" ]]; then
run_all_tests
else
- run_test "${proto}" "${test}"
+ exit_code=$(run_test "${proto}" "${test}")
+ exit $exit_code
fi;
--
2.39.5
5 months, 3 weeks
- 1
- 0
[PATCH AUTOSEL 6.1 162/212] kunit: tool: Use qboot on QEMU x86_64
by Sasha Levin
From: Brendan Jackman <jackmanb(a)google.com>
[ Upstream commit 08fafac4c9f289a9d9a22d838921e4b3eb22c664 ]
As noted in [0], SeaBIOS (QEMU default) makes a mess of the terminal,
qboot does not.
It turns out this is actually useful with kunit.py, since the user is
exposed to this issue if they set --raw_output=all.
qboot is also faster than SeaBIOS, but it's is marginal for this
usecase.
[0] https://lore.kernel.org/all/CA+i-1C0wYb-gZ8Mwh3WSVpbk-LF-Uo+njVbASJPe1WXDUR…
Both SeaBIOS and qboot are x86-specific.
Link: https://lore.kernel.org/r/20250124-kunit-qboot-v1-1-815e4d4c6f7c@google.com
Signed-off-by: Brendan Jackman <jackmanb(a)google.com>
Reviewed-by: David Gow <davidgow(a)google.com>
Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal(a)kernel.org>
---
tools/testing/kunit/qemu_configs/x86_64.py | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/tools/testing/kunit/qemu_configs/x86_64.py b/tools/testing/kunit/qemu_configs/x86_64.py
index dc79490768630..4a6bf4e048f5b 100644
--- a/tools/testing/kunit/qemu_configs/x86_64.py
+++ b/tools/testing/kunit/qemu_configs/x86_64.py
@@ -7,4 +7,6 @@ CONFIG_SERIAL_8250_CONSOLE=y''',
qemu_arch='x86_64',
kernel_path='arch/x86/boot/bzImage',
kernel_command_line='console=ttyS0',
- extra_qemu_params=[])
+ # qboot is faster than SeaBIOS and doesn't mess up
+ # the terminal.
+ extra_qemu_params=['-bios', 'qboot.rom'])
--
2.39.5
5 months, 3 weeks
- 1
- 0
[PATCH AUTOSEL 6.1 115/212] selftests/net: have `gro.sh -t` return a correct exit code
by Sasha Levin
From: Kevin Krakauer <krakauer(a)google.com>
[ Upstream commit 784e6abd99f24024a8998b5916795f0bec9d2fd9 ]
Modify gro.sh to return a useful exit code when the -t flag is used. It
formerly returned 0 no matter what.
Tested: Ran `gro.sh -t large` and verified that test failures return 1.
Signed-off-by: Kevin Krakauer <krakauer(a)google.com>
Reviewed-by: Willem de Bruijn <willemb(a)google.com>
Link: https://patch.msgid.link/20250226192725.621969-2-krakauer@google.com
Signed-off-by: Jakub Kicinski <kuba(a)kernel.org>
Signed-off-by: Sasha Levin <sashal(a)kernel.org>
---
tools/testing/selftests/net/gro.sh | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/net/gro.sh b/tools/testing/selftests/net/gro.sh
index 342ad27f631b1..e771f5f7faa26 100755
--- a/tools/testing/selftests/net/gro.sh
+++ b/tools/testing/selftests/net/gro.sh
@@ -95,5 +95,6 @@ trap cleanup EXIT
if [[ "${test}" == "all" ]]; then
run_all_tests
else
- run_test "${proto}" "${test}"
+ exit_code=$(run_test "${proto}" "${test}")
+ exit $exit_code
fi;
--
2.39.5
5 months, 3 weeks
- 1
- 0
[PATCH AUTOSEL 6.6 259/294] bridge: mdb: Allow replace of a host-joined group
by Sasha Levin
From: Petr Machata <petrm(a)nvidia.com>
[ Upstream commit d9e9f6d7b7d0c520bb87f19d2cbc57aeeb2091d5 ]
Attempts to replace an MDB group membership of the host itself are
currently bounced:
# ip link add name br up type bridge vlan_filtering 1
# bridge mdb replace dev br port br grp 239.0.0.1 vid 2
# bridge mdb replace dev br port br grp 239.0.0.1 vid 2
Error: bridge: Group is already joined by host.
A similar operation done on a member port would succeed. Ignore the check
for replacement of host group memberships as well.
The bit of code that this enables is br_multicast_host_join(), which, for
already-joined groups only refreshes the MC group expiration timer, which
is desirable; and a userspace notification, also desirable.
Change a selftest that exercises this code path from expecting a rejection
to expecting a pass. The rest of MDB selftests pass without modification.
Signed-off-by: Petr Machata <petrm(a)nvidia.com>
Reviewed-by: Ido Schimmel <idosch(a)nvidia.com>
Acked-by: Nikolay Aleksandrov <razor(a)blackwall.org>
Link: https://patch.msgid.link/e5c5188b9787ae806609e7ca3aa2a0a501b9b5c4.173868564…
Signed-off-by: Jakub Kicinski <kuba(a)kernel.org>
Signed-off-by: Sasha Levin <sashal(a)kernel.org>
---
net/bridge/br_mdb.c | 2 +-
tools/testing/selftests/net/forwarding/bridge_mdb.sh | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/net/bridge/br_mdb.c b/net/bridge/br_mdb.c
index 7305f5f8215ca..96bea0c8408fe 100644
--- a/net/bridge/br_mdb.c
+++ b/net/bridge/br_mdb.c
@@ -1030,7 +1030,7 @@ static int br_mdb_add_group(const struct br_mdb_config *cfg,
/* host join */
if (!port) {
- if (mp->host_joined) {
+ if (mp->host_joined && !(cfg->nlflags & NLM_F_REPLACE)) {
NL_SET_ERR_MSG_MOD(extack, "Group is already joined by host");
return -EEXIST;
}
diff --git a/tools/testing/selftests/net/forwarding/bridge_mdb.sh b/tools/testing/selftests/net/forwarding/bridge_mdb.sh
index a3678dfe5848a..c151374ddf040 100755
--- a/tools/testing/selftests/net/forwarding/bridge_mdb.sh
+++ b/tools/testing/selftests/net/forwarding/bridge_mdb.sh
@@ -149,7 +149,7 @@ cfg_test_host_common()
check_err $? "Failed to add $name host entry"
bridge mdb replace dev br0 port br0 grp $grp $state vid 10 &> /dev/null
- check_fail $? "Managed to replace $name host entry"
+ check_err $? "Failed to replace $name host entry"
bridge mdb del dev br0 port br0 grp $grp $state vid 10
bridge mdb get dev br0 grp $grp vid 10 &> /dev/null
--
2.39.5
5 months, 3 weeks
- 1
- 0
[PATCH v2 0/3] selftests: ublk: more misc fixes
by Uday Shankar
Fix some more minor issues in ublk selftests.
The first patch is from
https://lore.kernel.org/linux-block/20250423-ublk_selftests-v1-0-7d060e260e…
with a modification requested by Jens. The others are new.
Signed-off-by: Uday Shankar <ushankar(a)purestorage.com>
---
Changes in v2:
- Use a test-specific WERROR flag instead of reusing CONFIG_WERROR from
the kernel build for deciding whether or not to use -Werror for the
kublk build. The default behavior is to use -Werror (Ming Lei)
- Link to v1: https://lore.kernel.org/r/20250428-ublk_selftests-v1-0-5795f7b00cda@puresto…
---
Uday Shankar (3):
selftests: ublk: kublk: build with -Werror iff WERROR!=0
selftests: ublk: make test_generic_06 silent on success
selftests: ublk: kublk: fix include path
tools/testing/selftests/ublk/Makefile | 6 +++++-
tools/testing/selftests/ublk/kublk.h | 1 -
tools/testing/selftests/ublk/test_generic_06.sh | 2 +-
3 files changed, 6 insertions(+), 3 deletions(-)
---
base-commit: 53ec1abce79c986dc59e59d0c60d00088bcdf32a
change-id: 20250428-ublk_selftests-983240d3a325
Best regards,
--
Uday Shankar <ushankar(a)purestorage.com>
5 months, 3 weeks
- 3
- 5
[PATCH AUTOSEL 6.6 207/294] kunit: tool: Use qboot on QEMU x86_64
by Sasha Levin
From: Brendan Jackman <jackmanb(a)google.com>
[ Upstream commit 08fafac4c9f289a9d9a22d838921e4b3eb22c664 ]
As noted in [0], SeaBIOS (QEMU default) makes a mess of the terminal,
qboot does not.
It turns out this is actually useful with kunit.py, since the user is
exposed to this issue if they set --raw_output=all.
qboot is also faster than SeaBIOS, but it's is marginal for this
usecase.
[0] https://lore.kernel.org/all/CA+i-1C0wYb-gZ8Mwh3WSVpbk-LF-Uo+njVbASJPe1WXDUR…
Both SeaBIOS and qboot are x86-specific.
Link: https://lore.kernel.org/r/20250124-kunit-qboot-v1-1-815e4d4c6f7c@google.com
Signed-off-by: Brendan Jackman <jackmanb(a)google.com>
Reviewed-by: David Gow <davidgow(a)google.com>
Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal(a)kernel.org>
---
tools/testing/kunit/qemu_configs/x86_64.py | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/tools/testing/kunit/qemu_configs/x86_64.py b/tools/testing/kunit/qemu_configs/x86_64.py
index dc79490768630..4a6bf4e048f5b 100644
--- a/tools/testing/kunit/qemu_configs/x86_64.py
+++ b/tools/testing/kunit/qemu_configs/x86_64.py
@@ -7,4 +7,6 @@ CONFIG_SERIAL_8250_CONSOLE=y''',
qemu_arch='x86_64',
kernel_path='arch/x86/boot/bzImage',
kernel_command_line='console=ttyS0',
- extra_qemu_params=[])
+ # qboot is faster than SeaBIOS and doesn't mess up
+ # the terminal.
+ extra_qemu_params=['-bios', 'qboot.rom'])
--
2.39.5
5 months, 3 weeks
- 1
- 0
[PATCH 0/3] selftests: ublk: more misc fixes
by Uday Shankar
Fix some more minor issues in ublk selftests.
The first patch is from
https://lore.kernel.org/linux-block/20250423-ublk_selftests-v1-0-7d060e260e…
with a modification requested by Jens. The others are new.
Signed-off-by: Uday Shankar <ushankar(a)purestorage.com>
---
Uday Shankar (3):
selftests: ublk: kublk: build with -Werror iff CONFIG_WERROR=y
selftests: ublk: make test_generic_06 silent on success
selftests: ublk: kublk: fix include path
tools/testing/selftests/ublk/Makefile | 4 +++-
tools/testing/selftests/ublk/kublk.h | 1 -
tools/testing/selftests/ublk/test_generic_06.sh | 2 +-
3 files changed, 4 insertions(+), 3 deletions(-)
---
base-commit: 53ec1abce79c986dc59e59d0c60d00088bcdf32a
change-id: 20250428-ublk_selftests-983240d3a325
Best regards,
--
Uday Shankar <ushankar(a)purestorage.com>
5 months, 3 weeks
- 4
- 14
[PATCH AUTOSEL 6.6 145/294] selftests/net: have `gro.sh -t` return a correct exit code
by Sasha Levin
From: Kevin Krakauer <krakauer(a)google.com>
[ Upstream commit 784e6abd99f24024a8998b5916795f0bec9d2fd9 ]
Modify gro.sh to return a useful exit code when the -t flag is used. It
formerly returned 0 no matter what.
Tested: Ran `gro.sh -t large` and verified that test failures return 1.
Signed-off-by: Kevin Krakauer <krakauer(a)google.com>
Reviewed-by: Willem de Bruijn <willemb(a)google.com>
Link: https://patch.msgid.link/20250226192725.621969-2-krakauer@google.com
Signed-off-by: Jakub Kicinski <kuba(a)kernel.org>
Signed-off-by: Sasha Levin <sashal(a)kernel.org>
---
tools/testing/selftests/net/gro.sh | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/net/gro.sh b/tools/testing/selftests/net/gro.sh
index 342ad27f631b1..e771f5f7faa26 100755
--- a/tools/testing/selftests/net/gro.sh
+++ b/tools/testing/selftests/net/gro.sh
@@ -95,5 +95,6 @@ trap cleanup EXIT
if [[ "${test}" == "all" ]]; then
run_all_tests
else
- run_test "${proto}" "${test}"
+ exit_code=$(run_test "${proto}" "${test}")
+ exit $exit_code
fi;
--
2.39.5
5 months, 3 weeks
- 1
- 0
[PATCH AUTOSEL 6.12 486/486] kernfs: Use RCU to access kernfs_node::parent.
by Sasha Levin
From: Sebastian Andrzej Siewior <bigeasy(a)linutronix.de>
[ Upstream commit 633488947ef66b194377411322dc9e12aab79b65 ]
kernfs_rename_lock is used to obtain stable kernfs_node::{name|parent}
pointer. This is a preparation to access kernfs_node::parent under RCU
and ensure that the pointer remains stable under the RCU lifetime
guarantees.
For a complete path, as it is done in kernfs_path_from_node(), the
kernfs_rename_lock is still required in order to obtain a stable parent
relationship while computing the relevant node depth. This must not
change while the nodes are inspected in order to build the path.
If the kernfs user never moves the nodes (changes the parent) then the
kernfs_rename_lock is not required and the RCU guarantees are
sufficient. This "restriction" can be set with
KERNFS_ROOT_INVARIANT_PARENT. Otherwise the lock is required.
Rename kernfs_node::parent to kernfs_node::__parent to denote the RCU
access and use RCU accessor while accessing the node.
Make cgroup use KERNFS_ROOT_INVARIANT_PARENT since the parent here can
not change.
Acked-by: Tejun Heo <tj(a)kernel.org>
Cc: Yonghong Song <yonghong.song(a)linux.dev>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy(a)linutronix.de>
Link: https://lore.kernel.org/r/20250213145023.2820193-6-bigeasy@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal(a)kernel.org>
---
arch/x86/kernel/cpu/resctrl/rdtgroup.c | 65 +++++++++----
fs/kernfs/dir.c | 96 ++++++++++++-------
fs/kernfs/kernfs-internal.h | 32 ++++++-
fs/kernfs/mount.c | 10 +-
fs/kernfs/symlink.c | 23 ++---
fs/sysfs/file.c | 24 +++--
include/linux/kernfs.h | 10 +-
kernel/cgroup/cgroup-v1.c | 2 +-
kernel/cgroup/cgroup.c | 24 ++++-
.../selftests/bpf/progs/profiler.inc.h | 2 +-
10 files changed, 195 insertions(+), 93 deletions(-)
diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
index 2d48db66fca85..d4d7ccf1253b8 100644
--- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c
+++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
@@ -948,10 +948,20 @@ static int rdt_last_cmd_status_show(struct kernfs_open_file *of,
return 0;
}
+static void *rdt_kn_parent_priv(struct kernfs_node *kn)
+{
+ /*
+ * The parent pointer is only valid within RCU section since it can be
+ * replaced.
+ */
+ guard(rcu)();
+ return rcu_dereference(kn->__parent)->priv;
+}
+
static int rdt_num_closids_show(struct kernfs_open_file *of,
struct seq_file *seq, void *v)
{
- struct resctrl_schema *s = of->kn->parent->priv;
+ struct resctrl_schema *s = rdt_kn_parent_priv(of->kn);
seq_printf(seq, "%u\n", s->num_closid);
return 0;
@@ -960,7 +970,7 @@ static int rdt_num_closids_show(struct kernfs_open_file *of,
static int rdt_default_ctrl_show(struct kernfs_open_file *of,
struct seq_file *seq, void *v)
{
- struct resctrl_schema *s = of->kn->parent->priv;
+ struct resctrl_schema *s = rdt_kn_parent_priv(of->kn);
struct rdt_resource *r = s->res;
seq_printf(seq, "%x\n", r->default_ctrl);
@@ -970,7 +980,7 @@ static int rdt_default_ctrl_show(struct kernfs_open_file *of,
static int rdt_min_cbm_bits_show(struct kernfs_open_file *of,
struct seq_file *seq, void *v)
{
- struct resctrl_schema *s = of->kn->parent->priv;
+ struct resctrl_schema *s = rdt_kn_parent_priv(of->kn);
struct rdt_resource *r = s->res;
seq_printf(seq, "%u\n", r->cache.min_cbm_bits);
@@ -980,7 +990,7 @@ static int rdt_min_cbm_bits_show(struct kernfs_open_file *of,
static int rdt_shareable_bits_show(struct kernfs_open_file *of,
struct seq_file *seq, void *v)
{
- struct resctrl_schema *s = of->kn->parent->priv;
+ struct resctrl_schema *s = rdt_kn_parent_priv(of->kn);
struct rdt_resource *r = s->res;
seq_printf(seq, "%x\n", r->cache.shareable_bits);
@@ -1004,7 +1014,7 @@ static int rdt_shareable_bits_show(struct kernfs_open_file *of,
static int rdt_bit_usage_show(struct kernfs_open_file *of,
struct seq_file *seq, void *v)
{
- struct resctrl_schema *s = of->kn->parent->priv;
+ struct resctrl_schema *s = rdt_kn_parent_priv(of->kn);
/*
* Use unsigned long even though only 32 bits are used to ensure
* test_bit() is used safely.
@@ -1086,7 +1096,7 @@ static int rdt_bit_usage_show(struct kernfs_open_file *of,
static int rdt_min_bw_show(struct kernfs_open_file *of,
struct seq_file *seq, void *v)
{
- struct resctrl_schema *s = of->kn->parent->priv;
+ struct resctrl_schema *s = rdt_kn_parent_priv(of->kn);
struct rdt_resource *r = s->res;
seq_printf(seq, "%u\n", r->membw.min_bw);
@@ -1096,7 +1106,7 @@ static int rdt_min_bw_show(struct kernfs_open_file *of,
static int rdt_num_rmids_show(struct kernfs_open_file *of,
struct seq_file *seq, void *v)
{
- struct rdt_resource *r = of->kn->parent->priv;
+ struct rdt_resource *r = rdt_kn_parent_priv(of->kn);
seq_printf(seq, "%d\n", r->num_rmid);
@@ -1106,7 +1116,7 @@ static int rdt_num_rmids_show(struct kernfs_open_file *of,
static int rdt_mon_features_show(struct kernfs_open_file *of,
struct seq_file *seq, void *v)
{
- struct rdt_resource *r = of->kn->parent->priv;
+ struct rdt_resource *r = rdt_kn_parent_priv(of->kn);
struct mon_evt *mevt;
list_for_each_entry(mevt, &r->evt_list, list) {
@@ -1121,7 +1131,7 @@ static int rdt_mon_features_show(struct kernfs_open_file *of,
static int rdt_bw_gran_show(struct kernfs_open_file *of,
struct seq_file *seq, void *v)
{
- struct resctrl_schema *s = of->kn->parent->priv;
+ struct resctrl_schema *s = rdt_kn_parent_priv(of->kn);
struct rdt_resource *r = s->res;
seq_printf(seq, "%u\n", r->membw.bw_gran);
@@ -1131,7 +1141,7 @@ static int rdt_bw_gran_show(struct kernfs_open_file *of,
static int rdt_delay_linear_show(struct kernfs_open_file *of,
struct seq_file *seq, void *v)
{
- struct resctrl_schema *s = of->kn->parent->priv;
+ struct resctrl_schema *s = rdt_kn_parent_priv(of->kn);
struct rdt_resource *r = s->res;
seq_printf(seq, "%u\n", r->membw.delay_linear);
@@ -1149,7 +1159,7 @@ static int max_threshold_occ_show(struct kernfs_open_file *of,
static int rdt_thread_throttle_mode_show(struct kernfs_open_file *of,
struct seq_file *seq, void *v)
{
- struct resctrl_schema *s = of->kn->parent->priv;
+ struct resctrl_schema *s = rdt_kn_parent_priv(of->kn);
struct rdt_resource *r = s->res;
if (r->membw.throttle_mode == THREAD_THROTTLE_PER_THREAD)
@@ -1214,7 +1224,7 @@ static enum resctrl_conf_type resctrl_peer_type(enum resctrl_conf_type my_type)
static int rdt_has_sparse_bitmasks_show(struct kernfs_open_file *of,
struct seq_file *seq, void *v)
{
- struct resctrl_schema *s = of->kn->parent->priv;
+ struct resctrl_schema *s = rdt_kn_parent_priv(of->kn);
struct rdt_resource *r = s->res;
seq_printf(seq, "%u\n", r->cache.arch_has_sparse_bitmasks);
@@ -1626,7 +1636,7 @@ static int mbm_config_show(struct seq_file *s, struct rdt_resource *r, u32 evtid
static int mbm_total_bytes_config_show(struct kernfs_open_file *of,
struct seq_file *seq, void *v)
{
- struct rdt_resource *r = of->kn->parent->priv;
+ struct rdt_resource *r = rdt_kn_parent_priv(of->kn);
mbm_config_show(seq, r, QOS_L3_MBM_TOTAL_EVENT_ID);
@@ -1636,7 +1646,7 @@ static int mbm_total_bytes_config_show(struct kernfs_open_file *of,
static int mbm_local_bytes_config_show(struct kernfs_open_file *of,
struct seq_file *seq, void *v)
{
- struct rdt_resource *r = of->kn->parent->priv;
+ struct rdt_resource *r = rdt_kn_parent_priv(of->kn);
mbm_config_show(seq, r, QOS_L3_MBM_LOCAL_EVENT_ID);
@@ -1742,7 +1752,7 @@ static ssize_t mbm_total_bytes_config_write(struct kernfs_open_file *of,
char *buf, size_t nbytes,
loff_t off)
{
- struct rdt_resource *r = of->kn->parent->priv;
+ struct rdt_resource *r = rdt_kn_parent_priv(of->kn);
int ret;
/* Valid input requires a trailing newline */
@@ -1768,7 +1778,7 @@ static ssize_t mbm_local_bytes_config_write(struct kernfs_open_file *of,
char *buf, size_t nbytes,
loff_t off)
{
- struct rdt_resource *r = of->kn->parent->priv;
+ struct rdt_resource *r = rdt_kn_parent_priv(of->kn);
int ret;
/* Valid input requires a trailing newline */
@@ -2430,12 +2440,13 @@ static struct rdtgroup *kernfs_to_rdtgroup(struct kernfs_node *kn)
* resource. "info" and its subdirectories don't
* have rdtgroup structures, so return NULL here.
*/
- if (kn == kn_info || kn->parent == kn_info)
+ if (kn == kn_info ||
+ rcu_access_pointer(kn->__parent) == kn_info)
return NULL;
else
return kn->priv;
} else {
- return kn->parent->priv;
+ return rdt_kn_parent_priv(kn);
}
}
@@ -3759,9 +3770,18 @@ static int rdtgroup_rmdir_ctrl(struct rdtgroup *rdtgrp, cpumask_var_t tmpmask)
return 0;
}
+static struct kernfs_node *rdt_kn_parent(struct kernfs_node *kn)
+{
+ /*
+ * Valid within the RCU section it was obtained or while rdtgroup_mutex
+ * is held.
+ */
+ return rcu_dereference_check(kn->__parent, lockdep_is_held(&rdtgroup_mutex));
+}
+
static int rdtgroup_rmdir(struct kernfs_node *kn)
{
- struct kernfs_node *parent_kn = kn->parent;
+ struct kernfs_node *parent_kn;
struct rdtgroup *rdtgrp;
cpumask_var_t tmpmask;
int ret = 0;
@@ -3774,6 +3794,7 @@ static int rdtgroup_rmdir(struct kernfs_node *kn)
ret = -EPERM;
goto out;
}
+ parent_kn = rdt_kn_parent(kn);
/*
* If the rdtgroup is a ctrl_mon group and parent directory
@@ -3842,6 +3863,7 @@ static void mongrp_reparent(struct rdtgroup *rdtgrp,
static int rdtgroup_rename(struct kernfs_node *kn,
struct kernfs_node *new_parent, const char *new_name)
{
+ struct kernfs_node *kn_parent;
struct rdtgroup *new_prdtgrp;
struct rdtgroup *rdtgrp;
cpumask_var_t tmpmask;
@@ -3876,8 +3898,9 @@ static int rdtgroup_rename(struct kernfs_node *kn,
goto out;
}
- if (rdtgrp->type != RDTMON_GROUP || !kn->parent ||
- !is_mon_groups(kn->parent, kn->name)) {
+ kn_parent = rdt_kn_parent(kn);
+ if (rdtgrp->type != RDTMON_GROUP || !kn_parent ||
+ !is_mon_groups(kn_parent, kn->name)) {
rdt_last_cmd_puts("Source must be a MON group\n");
ret = -EPERM;
goto out;
diff --git a/fs/kernfs/dir.c b/fs/kernfs/dir.c
index 5a1fea414996e..d2306641b569c 100644
--- a/fs/kernfs/dir.c
+++ b/fs/kernfs/dir.c
@@ -17,7 +17,7 @@
#include "kernfs-internal.h"
-static DEFINE_RWLOCK(kernfs_rename_lock); /* kn->parent and ->name */
+DEFINE_RWLOCK(kernfs_rename_lock); /* kn->parent and ->name */
/*
* Don't use rename_lock to piggy back on pr_cont_buf. We don't want to
* call pr_cont() while holding rename_lock. Because sometimes pr_cont()
@@ -56,7 +56,7 @@ static int kernfs_name_locked(struct kernfs_node *kn, char *buf, size_t buflen)
if (!kn)
return strscpy(buf, "(null)", buflen);
- return strscpy(buf, kn->parent ? kn->name : "/", buflen);
+ return strscpy(buf, rcu_access_pointer(kn->__parent) ? kn->name : "/", buflen);
}
/* kernfs_node_depth - compute depth from @from to @to */
@@ -64,9 +64,9 @@ static size_t kernfs_depth(struct kernfs_node *from, struct kernfs_node *to)
{
size_t depth = 0;
- while (to->parent && to != from) {
+ while (rcu_dereference(to->__parent) && to != from) {
depth++;
- to = to->parent;
+ to = rcu_dereference(to->__parent);
}
return depth;
}
@@ -84,18 +84,18 @@ static struct kernfs_node *kernfs_common_ancestor(struct kernfs_node *a,
db = kernfs_depth(rb->kn, b);
while (da > db) {
- a = a->parent;
+ a = rcu_dereference(a->__parent);
da--;
}
while (db > da) {
- b = b->parent;
+ b = rcu_dereference(b->__parent);
db--;
}
/* worst case b and a will be the same at root */
while (b != a) {
- b = b->parent;
- a = a->parent;
+ b = rcu_dereference(b->__parent);
+ a = rcu_dereference(a->__parent);
}
return a;
@@ -168,8 +168,9 @@ static int kernfs_path_from_node_locked(struct kernfs_node *kn_to,
/* Calculate how many bytes we need for the rest */
for (i = depth_to - 1; i >= 0; i--) {
+
for (kn = kn_to, j = 0; j < i; j++)
- kn = kn->parent;
+ kn = rcu_dereference(kn->__parent);
len += scnprintf(buf + len, buflen - len, "/%s", kn->name);
}
@@ -226,6 +227,7 @@ int kernfs_path_from_node(struct kernfs_node *to, struct kernfs_node *from,
unsigned long flags;
int ret;
+ guard(rcu)();
read_lock_irqsave(&kernfs_rename_lock, flags);
ret = kernfs_path_from_node_locked(to, from, buf, buflen);
read_unlock_irqrestore(&kernfs_rename_lock, flags);
@@ -295,7 +297,7 @@ struct kernfs_node *kernfs_get_parent(struct kernfs_node *kn)
unsigned long flags;
read_lock_irqsave(&kernfs_rename_lock, flags);
- parent = kn->parent;
+ parent = kernfs_parent(kn);
kernfs_get(parent);
read_unlock_irqrestore(&kernfs_rename_lock, flags);
@@ -360,8 +362,12 @@ static int kernfs_sd_compare(const struct kernfs_node *left,
*/
static int kernfs_link_sibling(struct kernfs_node *kn)
{
- struct rb_node **node = &kn->parent->dir.children.rb_node;
struct rb_node *parent = NULL;
+ struct kernfs_node *kn_parent;
+ struct rb_node **node;
+
+ kn_parent = kernfs_parent(kn);
+ node = &kn_parent->dir.children.rb_node;
while (*node) {
struct kernfs_node *pos;
@@ -380,13 +386,13 @@ static int kernfs_link_sibling(struct kernfs_node *kn)
/* add new node and rebalance the tree */
rb_link_node(&kn->rb, parent, node);
- rb_insert_color(&kn->rb, &kn->parent->dir.children);
+ rb_insert_color(&kn->rb, &kn_parent->dir.children);
/* successfully added, account subdir number */
down_write(&kernfs_root(kn)->kernfs_iattr_rwsem);
if (kernfs_type(kn) == KERNFS_DIR)
- kn->parent->dir.subdirs++;
- kernfs_inc_rev(kn->parent);
+ kn_parent->dir.subdirs++;
+ kernfs_inc_rev(kn_parent);
up_write(&kernfs_root(kn)->kernfs_iattr_rwsem);
return 0;
@@ -407,16 +413,19 @@ static int kernfs_link_sibling(struct kernfs_node *kn)
*/
static bool kernfs_unlink_sibling(struct kernfs_node *kn)
{
+ struct kernfs_node *kn_parent;
+
if (RB_EMPTY_NODE(&kn->rb))
return false;
+ kn_parent = kernfs_parent(kn);
down_write(&kernfs_root(kn)->kernfs_iattr_rwsem);
if (kernfs_type(kn) == KERNFS_DIR)
- kn->parent->dir.subdirs--;
- kernfs_inc_rev(kn->parent);
+ kn_parent->dir.subdirs--;
+ kernfs_inc_rev(kn_parent);
up_write(&kernfs_root(kn)->kernfs_iattr_rwsem);
- rb_erase(&kn->rb, &kn->parent->dir.children);
+ rb_erase(&kn->rb, &kn_parent->dir.children);
RB_CLEAR_NODE(&kn->rb);
return true;
}
@@ -562,7 +571,7 @@ void kernfs_put(struct kernfs_node *kn)
* Moving/renaming is always done while holding reference.
* kn->parent won't change beneath us.
*/
- parent = kn->parent;
+ parent = kernfs_parent(kn);
WARN_ONCE(atomic_read(&kn->active) != KN_DEACTIVATED_BIAS,
"kernfs_put: %s/%s: released with incorrect active_ref %d\n",
@@ -701,7 +710,7 @@ struct kernfs_node *kernfs_new_node(struct kernfs_node *parent,
name, mode, uid, gid, flags);
if (kn) {
kernfs_get(parent);
- kn->parent = parent;
+ rcu_assign_pointer(kn->__parent, parent);
}
return kn;
}
@@ -769,13 +778,14 @@ struct kernfs_node *kernfs_find_and_get_node_by_id(struct kernfs_root *root,
*/
int kernfs_add_one(struct kernfs_node *kn)
{
- struct kernfs_node *parent = kn->parent;
- struct kernfs_root *root = kernfs_root(parent);
+ struct kernfs_root *root = kernfs_root(kn);
struct kernfs_iattrs *ps_iattr;
+ struct kernfs_node *parent;
bool has_ns;
int ret;
down_write(&root->kernfs_rwsem);
+ parent = kernfs_parent(kn);
ret = -EINVAL;
has_ns = kernfs_ns_enabled(parent);
@@ -949,6 +959,11 @@ struct kernfs_node *kernfs_walk_and_get_ns(struct kernfs_node *parent,
return kn;
}
+unsigned int kernfs_root_flags(struct kernfs_node *kn)
+{
+ return kernfs_root(kn)->flags;
+}
+
/**
* kernfs_create_root - create a new kernfs hierarchy
* @scops: optional syscall operations for the hierarchy
@@ -1111,7 +1126,7 @@ struct kernfs_node *kernfs_create_empty_dir(struct kernfs_node *parent,
static int kernfs_dop_revalidate(struct dentry *dentry, unsigned int flags)
{
- struct kernfs_node *kn;
+ struct kernfs_node *kn, *parent;
struct kernfs_root *root;
if (flags & LOOKUP_RCU)
@@ -1162,8 +1177,9 @@ static int kernfs_dop_revalidate(struct dentry *dentry, unsigned int flags)
if (!kernfs_active(kn))
goto out_bad;
+ parent = kernfs_parent(kn);
/* The kernfs node has been moved? */
- if (kernfs_dentry_node(dentry->d_parent) != kn->parent)
+ if (kernfs_dentry_node(dentry->d_parent) != parent)
goto out_bad;
/* The kernfs node has been renamed */
@@ -1171,7 +1187,7 @@ static int kernfs_dop_revalidate(struct dentry *dentry, unsigned int flags)
goto out_bad;
/* The kernfs node has been moved to a different namespace */
- if (kn->parent && kernfs_ns_enabled(kn->parent) &&
+ if (parent && kernfs_ns_enabled(parent) &&
kernfs_info(dentry->d_sb)->ns != kn->ns)
goto out_bad;
@@ -1364,7 +1380,7 @@ static struct kernfs_node *kernfs_next_descendant_post(struct kernfs_node *pos,
return kernfs_leftmost_descendant(rb_to_kn(rbn));
/* no sibling left, visit parent */
- return pos->parent;
+ return kernfs_parent(pos);
}
static void kernfs_activate_one(struct kernfs_node *kn)
@@ -1376,7 +1392,7 @@ static void kernfs_activate_one(struct kernfs_node *kn)
if (kernfs_active(kn) || (kn->flags & (KERNFS_HIDDEN | KERNFS_REMOVING)))
return;
- WARN_ON_ONCE(kn->parent && RB_EMPTY_NODE(&kn->rb));
+ WARN_ON_ONCE(rcu_access_pointer(kn->__parent) && RB_EMPTY_NODE(&kn->rb));
WARN_ON_ONCE(atomic_read(&kn->active) != KN_DEACTIVATED_BIAS);
atomic_sub(KN_DEACTIVATED_BIAS, &kn->active);
@@ -1446,7 +1462,7 @@ void kernfs_show(struct kernfs_node *kn, bool show)
static void __kernfs_remove(struct kernfs_node *kn)
{
- struct kernfs_node *pos;
+ struct kernfs_node *pos, *parent;
/* Short-circuit if non-root @kn has already finished removal. */
if (!kn)
@@ -1458,7 +1474,7 @@ static void __kernfs_remove(struct kernfs_node *kn)
* This is for kernfs_remove_self() which plays with active ref
* after removal.
*/
- if (kn->parent && RB_EMPTY_NODE(&kn->rb))
+ if (kernfs_parent(kn) && RB_EMPTY_NODE(&kn->rb))
return;
pr_debug("kernfs %s: removing\n", kn->name);
@@ -1484,14 +1500,14 @@ static void __kernfs_remove(struct kernfs_node *kn)
kernfs_get(pos);
kernfs_drain(pos);
-
+ parent = kernfs_parent(pos);
/*
* kernfs_unlink_sibling() succeeds once per node. Use it
* to decide who's responsible for cleanups.
*/
- if (!pos->parent || kernfs_unlink_sibling(pos)) {
+ if (!parent || kernfs_unlink_sibling(pos)) {
struct kernfs_iattrs *ps_iattr =
- pos->parent ? pos->parent->iattr : NULL;
+ parent ? parent->iattr : NULL;
/* update timestamps on the parent */
down_write(&kernfs_root(kn)->kernfs_iattr_rwsem);
@@ -1721,7 +1737,7 @@ int kernfs_rename_ns(struct kernfs_node *kn, struct kernfs_node *new_parent,
int error;
/* can't move or rename root */
- if (!kn->parent)
+ if (!rcu_access_pointer(kn->__parent))
return -EINVAL;
root = kernfs_root(kn);
@@ -1732,8 +1748,15 @@ int kernfs_rename_ns(struct kernfs_node *kn, struct kernfs_node *new_parent,
(new_parent->flags & KERNFS_EMPTY_DIR))
goto out;
+ old_parent = kernfs_parent(kn);
+ if (root->flags & KERNFS_ROOT_INVARIANT_PARENT) {
+ error = -EINVAL;
+ if (WARN_ON_ONCE(old_parent != new_parent))
+ goto out;
+ }
+
error = 0;
- if ((kn->parent == new_parent) && (kn->ns == new_ns) &&
+ if ((old_parent == new_parent) && (kn->ns == new_ns) &&
(strcmp(kn->name, new_name) == 0))
goto out; /* nothing to rename */
@@ -1760,8 +1783,8 @@ int kernfs_rename_ns(struct kernfs_node *kn, struct kernfs_node *new_parent,
/* rename_lock protects ->parent and ->name accessors */
write_lock_irq(&kernfs_rename_lock);
- old_parent = kn->parent;
- kn->parent = new_parent;
+ old_parent = kernfs_parent(kn);
+ rcu_assign_pointer(kn->__parent, new_parent);
kn->ns = new_ns;
if (new_name) {
@@ -1794,7 +1817,8 @@ static struct kernfs_node *kernfs_dir_pos(const void *ns,
{
if (pos) {
int valid = kernfs_active(pos) &&
- pos->parent == parent && hash == pos->hash;
+ rcu_access_pointer(pos->__parent) == parent &&
+ hash == pos->hash;
kernfs_put(pos);
if (!valid)
pos = NULL;
diff --git a/fs/kernfs/kernfs-internal.h b/fs/kernfs/kernfs-internal.h
index b42ee6547cdc1..c43bee18b79f7 100644
--- a/fs/kernfs/kernfs-internal.h
+++ b/fs/kernfs/kernfs-internal.h
@@ -19,6 +19,8 @@
#include <linux/kernfs.h>
#include <linux/fs_context.h>
+extern rwlock_t kernfs_rename_lock;
+
struct kernfs_iattrs {
kuid_t ia_uid;
kgid_t ia_gid;
@@ -64,11 +66,14 @@ struct kernfs_root {
*
* Return: the kernfs_root @kn belongs to.
*/
-static inline struct kernfs_root *kernfs_root(struct kernfs_node *kn)
+static inline struct kernfs_root *kernfs_root(const struct kernfs_node *kn)
{
+ const struct kernfs_node *knp;
/* if parent exists, it's always a dir; otherwise, @sd is a dir */
- if (kn->parent)
- kn = kn->parent;
+ guard(rcu)();
+ knp = rcu_dereference(kn->__parent);
+ if (knp)
+ kn = knp;
return kn->dir.root;
}
@@ -97,6 +102,27 @@ struct kernfs_super_info {
};
#define kernfs_info(SB) ((struct kernfs_super_info *)(SB->s_fs_info))
+static inline bool kernfs_root_is_locked(const struct kernfs_node *kn)
+{
+ return lockdep_is_held(&kernfs_root(kn)->kernfs_rwsem);
+}
+
+static inline struct kernfs_node *kernfs_parent(const struct kernfs_node *kn)
+{
+ /*
+ * The kernfs_node::__parent remains valid within a RCU section. The kn
+ * can be reparented (and renamed) which changes the entry. This can be
+ * avoided by locking kernfs_root::kernfs_rwsem or kernfs_rename_lock.
+ * Both locks can be used to obtain a reference on __parent. Once the
+ * reference count reaches 0 then the node is about to be freed
+ * and can not be renamed (or become a different parent) anymore.
+ */
+ return rcu_dereference_check(kn->__parent,
+ kernfs_root_is_locked(kn) ||
+ lockdep_is_held(&kernfs_rename_lock) ||
+ !atomic_read(&kn->count));
+}
+
static inline struct kernfs_node *kernfs_dentry_node(struct dentry *dentry)
{
if (d_really_is_negative(dentry))
diff --git a/fs/kernfs/mount.c b/fs/kernfs/mount.c
index 4a0ff08d589ca..2252b16e6ef0b 100644
--- a/fs/kernfs/mount.c
+++ b/fs/kernfs/mount.c
@@ -148,7 +148,7 @@ static struct dentry *kernfs_get_parent_dentry(struct dentry *child)
struct kernfs_root *root = kernfs_root(kn);
guard(rwsem_read)(&root->kernfs_rwsem);
- return d_obtain_alias(kernfs_get_inode(child->d_sb, kn->parent));
+ return d_obtain_alias(kernfs_get_inode(child->d_sb, kernfs_parent(kn)));
}
static const struct export_operations kernfs_export_ops = {
@@ -188,10 +188,10 @@ static struct kernfs_node *find_next_ancestor(struct kernfs_node *child,
return NULL;
}
- while (child->parent != parent) {
- if (!child->parent)
+ while (kernfs_parent(child) != parent) {
+ child = kernfs_parent(child);
+ if (!child)
return NULL;
- child = child->parent;
}
return child;
@@ -216,7 +216,7 @@ struct dentry *kernfs_node_dentry(struct kernfs_node *kn,
dentry = dget(sb->s_root);
/* Check if this is the root kernfs_node */
- if (!kn->parent)
+ if (!rcu_access_pointer(kn->__parent))
return dentry;
root = kernfs_root(kn);
diff --git a/fs/kernfs/symlink.c b/fs/kernfs/symlink.c
index 45371a70caa71..05c62ca93c53d 100644
--- a/fs/kernfs/symlink.c
+++ b/fs/kernfs/symlink.c
@@ -62,10 +62,10 @@ static int kernfs_get_target_path(struct kernfs_node *parent,
/* go up to the root, stop at the base */
base = parent;
- while (base->parent) {
- kn = target->parent;
- while (kn->parent && base != kn)
- kn = kn->parent;
+ while (kernfs_parent(base)) {
+ kn = kernfs_parent(target);
+ while (kernfs_parent(kn) && base != kn)
+ kn = kernfs_parent(kn);
if (base == kn)
break;
@@ -75,14 +75,14 @@ static int kernfs_get_target_path(struct kernfs_node *parent,
strcpy(s, "../");
s += 3;
- base = base->parent;
+ base = kernfs_parent(base);
}
/* determine end of target string for reverse fillup */
kn = target;
- while (kn->parent && kn != base) {
+ while (kernfs_parent(kn) && kn != base) {
len += strlen(kn->name) + 1;
- kn = kn->parent;
+ kn = kernfs_parent(kn);
}
/* check limits */
@@ -94,7 +94,7 @@ static int kernfs_get_target_path(struct kernfs_node *parent,
/* reverse fillup of target string from target to base */
kn = target;
- while (kn->parent && kn != base) {
+ while (kernfs_parent(kn) && kn != base) {
int slen = strlen(kn->name);
len -= slen;
@@ -102,7 +102,7 @@ static int kernfs_get_target_path(struct kernfs_node *parent,
if (len)
s[--len] = '/';
- kn = kn->parent;
+ kn = kernfs_parent(kn);
}
return 0;
@@ -111,12 +111,13 @@ static int kernfs_get_target_path(struct kernfs_node *parent,
static int kernfs_getlink(struct inode *inode, char *path)
{
struct kernfs_node *kn = inode->i_private;
- struct kernfs_node *parent = kn->parent;
+ struct kernfs_node *parent;
struct kernfs_node *target = kn->symlink.target_kn;
- struct kernfs_root *root = kernfs_root(parent);
+ struct kernfs_root *root = kernfs_root(kn);
int error;
down_read(&root->kernfs_rwsem);
+ parent = kernfs_parent(kn);
error = kernfs_get_target_path(parent, target, path);
up_read(&root->kernfs_rwsem);
diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index d1995e2d6c943..3671a3fd60198 100644
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -19,13 +19,19 @@
#include "sysfs.h"
+static struct kobject *sysfs_file_kobj(struct kernfs_node *kn)
+{
+ guard(rcu)();
+ return rcu_dereference(kn->__parent)->priv;
+}
+
/*
* Determine ktype->sysfs_ops for the given kernfs_node. This function
* must be called while holding an active reference.
*/
static const struct sysfs_ops *sysfs_file_ops(struct kernfs_node *kn)
{
- struct kobject *kobj = kn->parent->priv;
+ struct kobject *kobj = sysfs_file_kobj(kn);
if (kn->flags & KERNFS_LOCKDEP)
lockdep_assert_held(kn);
@@ -40,7 +46,7 @@ static const struct sysfs_ops *sysfs_file_ops(struct kernfs_node *kn)
static int sysfs_kf_seq_show(struct seq_file *sf, void *v)
{
struct kernfs_open_file *of = sf->private;
- struct kobject *kobj = of->kn->parent->priv;
+ struct kobject *kobj = sysfs_file_kobj(of->kn);
const struct sysfs_ops *ops = sysfs_file_ops(of->kn);
ssize_t count;
char *buf;
@@ -78,7 +84,7 @@ static ssize_t sysfs_kf_bin_read(struct kernfs_open_file *of, char *buf,
size_t count, loff_t pos)
{
struct bin_attribute *battr = of->kn->priv;
- struct kobject *kobj = of->kn->parent->priv;
+ struct kobject *kobj = sysfs_file_kobj(of->kn);
loff_t size = file_inode(of->file)->i_size;
if (!count)
@@ -102,7 +108,7 @@ static ssize_t sysfs_kf_read(struct kernfs_open_file *of, char *buf,
size_t count, loff_t pos)
{
const struct sysfs_ops *ops = sysfs_file_ops(of->kn);
- struct kobject *kobj = of->kn->parent->priv;
+ struct kobject *kobj = sysfs_file_kobj(of->kn);
ssize_t len;
/*
@@ -128,7 +134,7 @@ static ssize_t sysfs_kf_write(struct kernfs_open_file *of, char *buf,
size_t count, loff_t pos)
{
const struct sysfs_ops *ops = sysfs_file_ops(of->kn);
- struct kobject *kobj = of->kn->parent->priv;
+ struct kobject *kobj = sysfs_file_kobj(of->kn);
if (!count)
return 0;
@@ -141,7 +147,7 @@ static ssize_t sysfs_kf_bin_write(struct kernfs_open_file *of, char *buf,
size_t count, loff_t pos)
{
struct bin_attribute *battr = of->kn->priv;
- struct kobject *kobj = of->kn->parent->priv;
+ struct kobject *kobj = sysfs_file_kobj(of->kn);
loff_t size = file_inode(of->file)->i_size;
if (size) {
@@ -162,7 +168,7 @@ static int sysfs_kf_bin_mmap(struct kernfs_open_file *of,
struct vm_area_struct *vma)
{
struct bin_attribute *battr = of->kn->priv;
- struct kobject *kobj = of->kn->parent->priv;
+ struct kobject *kobj = sysfs_file_kobj(of->kn);
return battr->mmap(of->file, kobj, battr, vma);
}
@@ -171,7 +177,7 @@ static loff_t sysfs_kf_bin_llseek(struct kernfs_open_file *of, loff_t offset,
int whence)
{
struct bin_attribute *battr = of->kn->priv;
- struct kobject *kobj = of->kn->parent->priv;
+ struct kobject *kobj = sysfs_file_kobj(of->kn);
if (battr->llseek)
return battr->llseek(of->file, kobj, battr, offset, whence);
@@ -482,7 +488,7 @@ EXPORT_SYMBOL_GPL(sysfs_break_active_protection);
*/
void sysfs_unbreak_active_protection(struct kernfs_node *kn)
{
- struct kobject *kobj = kn->parent->priv;
+ struct kobject *kobj = sysfs_file_kobj(kn);
kernfs_unbreak_active_protection(kn);
kernfs_put(kn);
diff --git a/include/linux/kernfs.h b/include/linux/kernfs.h
index 87c79d076d6d7..5dda9a268e44c 100644
--- a/include/linux/kernfs.h
+++ b/include/linux/kernfs.h
@@ -147,6 +147,11 @@ enum kernfs_root_flag {
* Support user xattrs to be written to nodes rooted at this root.
*/
KERNFS_ROOT_SUPPORT_USER_XATTR = 0x0008,
+
+ /*
+ * Renames must not change the parent node.
+ */
+ KERNFS_ROOT_INVARIANT_PARENT = 0x0010,
};
/* type-specific structures for kernfs_node union members */
@@ -199,8 +204,8 @@ struct kernfs_node {
* never moved to a different parent, it is safe to access the
* parent directly.
*/
- struct kernfs_node *parent;
const char *name;
+ struct kernfs_node __rcu *__parent;
struct rb_node rb;
@@ -416,6 +421,7 @@ struct dentry *kernfs_node_dentry(struct kernfs_node *kn,
struct kernfs_root *kernfs_create_root(struct kernfs_syscall_ops *scops,
unsigned int flags, void *priv);
void kernfs_destroy_root(struct kernfs_root *root);
+unsigned int kernfs_root_flags(struct kernfs_node *kn);
struct kernfs_node *kernfs_create_dir_ns(struct kernfs_node *parent,
const char *name, umode_t mode,
@@ -514,6 +520,8 @@ kernfs_create_root(struct kernfs_syscall_ops *scops, unsigned int flags,
{ return ERR_PTR(-ENOSYS); }
static inline void kernfs_destroy_root(struct kernfs_root *root) { }
+static inline unsigned int kernfs_root_flags(struct kernfs_node *kn)
+{ return 0; }
static inline struct kernfs_node *
kernfs_create_dir_ns(struct kernfs_node *parent, const char *name,
diff --git a/kernel/cgroup/cgroup-v1.c b/kernel/cgroup/cgroup-v1.c
index e28d5f0d20ed0..c9752eb607ec9 100644
--- a/kernel/cgroup/cgroup-v1.c
+++ b/kernel/cgroup/cgroup-v1.c
@@ -844,7 +844,7 @@ static int cgroup1_rename(struct kernfs_node *kn, struct kernfs_node *new_parent
if (kernfs_type(kn) != KERNFS_DIR)
return -ENOTDIR;
- if (kn->parent != new_parent)
+ if (rcu_access_pointer(kn->__parent) != new_parent)
return -EIO;
/*
diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c
index e63d6f3b00470..fc152691a6b42 100644
--- a/kernel/cgroup/cgroup.c
+++ b/kernel/cgroup/cgroup.c
@@ -633,9 +633,22 @@ int cgroup_task_count(const struct cgroup *cgrp)
return count;
}
+static struct cgroup *kn_priv(struct kernfs_node *kn)
+{
+ struct kernfs_node *parent;
+ /*
+ * The parent can not be replaced due to KERNFS_ROOT_INVARIANT_PARENT.
+ * Therefore it is always safe to dereference this pointer outside of a
+ * RCU section.
+ */
+ parent = rcu_dereference_check(kn->__parent,
+ kernfs_root_flags(kn) & KERNFS_ROOT_INVARIANT_PARENT);
+ return parent->priv;
+}
+
struct cgroup_subsys_state *of_css(struct kernfs_open_file *of)
{
- struct cgroup *cgrp = of->kn->parent->priv;
+ struct cgroup *cgrp = kn_priv(of->kn);
struct cftype *cft = of_cft(of);
/*
@@ -1612,7 +1625,7 @@ void cgroup_kn_unlock(struct kernfs_node *kn)
if (kernfs_type(kn) == KERNFS_DIR)
cgrp = kn->priv;
else
- cgrp = kn->parent->priv;
+ cgrp = kn_priv(kn);
cgroup_unlock();
@@ -1644,7 +1657,7 @@ struct cgroup *cgroup_kn_lock_live(struct kernfs_node *kn, bool drain_offline)
if (kernfs_type(kn) == KERNFS_DIR)
cgrp = kn->priv;
else
- cgrp = kn->parent->priv;
+ cgrp = kn_priv(kn);
/*
* We're gonna grab cgroup_mutex which nests outside kernfs
@@ -2118,7 +2131,8 @@ int cgroup_setup_root(struct cgroup_root *root, u16 ss_mask)
root->kf_root = kernfs_create_root(kf_sops,
KERNFS_ROOT_CREATE_DEACTIVATED |
KERNFS_ROOT_SUPPORT_EXPORTOP |
- KERNFS_ROOT_SUPPORT_USER_XATTR,
+ KERNFS_ROOT_SUPPORT_USER_XATTR |
+ KERNFS_ROOT_INVARIANT_PARENT,
root_cgrp);
if (IS_ERR(root->kf_root)) {
ret = PTR_ERR(root->kf_root);
@@ -4144,7 +4158,7 @@ static ssize_t cgroup_file_write(struct kernfs_open_file *of, char *buf,
size_t nbytes, loff_t off)
{
struct cgroup_file_ctx *ctx = of->priv;
- struct cgroup *cgrp = of->kn->parent->priv;
+ struct cgroup *cgrp = kn_priv(of->kn);
struct cftype *cft = of_cft(of);
struct cgroup_subsys_state *css;
int ret;
diff --git a/tools/testing/selftests/bpf/progs/profiler.inc.h b/tools/testing/selftests/bpf/progs/profiler.inc.h
index 8bd1ebd7d6afd..813143b4985dc 100644
--- a/tools/testing/selftests/bpf/progs/profiler.inc.h
+++ b/tools/testing/selftests/bpf/progs/profiler.inc.h
@@ -223,7 +223,7 @@ static INLINE void* read_full_cgroup_path(struct kernfs_node* cgroup_node,
if (bpf_cmp_likely(filepart_length, <=, MAX_PATH)) {
payload += filepart_length;
}
- cgroup_node = BPF_CORE_READ(cgroup_node, parent);
+ cgroup_node = BPF_CORE_READ(cgroup_node, __parent);
}
return payload;
}
--
2.39.5
5 months, 3 weeks
- 1
- 0
[PATCH AUTOSEL 6.12 428/486] bridge: mdb: Allow replace of a host-joined group
by Sasha Levin
From: Petr Machata <petrm(a)nvidia.com>
[ Upstream commit d9e9f6d7b7d0c520bb87f19d2cbc57aeeb2091d5 ]
Attempts to replace an MDB group membership of the host itself are
currently bounced:
# ip link add name br up type bridge vlan_filtering 1
# bridge mdb replace dev br port br grp 239.0.0.1 vid 2
# bridge mdb replace dev br port br grp 239.0.0.1 vid 2
Error: bridge: Group is already joined by host.
A similar operation done on a member port would succeed. Ignore the check
for replacement of host group memberships as well.
The bit of code that this enables is br_multicast_host_join(), which, for
already-joined groups only refreshes the MC group expiration timer, which
is desirable; and a userspace notification, also desirable.
Change a selftest that exercises this code path from expecting a rejection
to expecting a pass. The rest of MDB selftests pass without modification.
Signed-off-by: Petr Machata <petrm(a)nvidia.com>
Reviewed-by: Ido Schimmel <idosch(a)nvidia.com>
Acked-by: Nikolay Aleksandrov <razor(a)blackwall.org>
Link: https://patch.msgid.link/e5c5188b9787ae806609e7ca3aa2a0a501b9b5c4.173868564…
Signed-off-by: Jakub Kicinski <kuba(a)kernel.org>
Signed-off-by: Sasha Levin <sashal(a)kernel.org>
---
net/bridge/br_mdb.c | 2 +-
tools/testing/selftests/net/forwarding/bridge_mdb.sh | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/net/bridge/br_mdb.c b/net/bridge/br_mdb.c
index 1a52a0bca086d..7e1ad229e1330 100644
--- a/net/bridge/br_mdb.c
+++ b/net/bridge/br_mdb.c
@@ -1040,7 +1040,7 @@ static int br_mdb_add_group(const struct br_mdb_config *cfg,
/* host join */
if (!port) {
- if (mp->host_joined) {
+ if (mp->host_joined && !(cfg->nlflags & NLM_F_REPLACE)) {
NL_SET_ERR_MSG_MOD(extack, "Group is already joined by host");
return -EEXIST;
}
diff --git a/tools/testing/selftests/net/forwarding/bridge_mdb.sh b/tools/testing/selftests/net/forwarding/bridge_mdb.sh
index d9d587454d207..8c1597ebc2d38 100755
--- a/tools/testing/selftests/net/forwarding/bridge_mdb.sh
+++ b/tools/testing/selftests/net/forwarding/bridge_mdb.sh
@@ -149,7 +149,7 @@ cfg_test_host_common()
check_err $? "Failed to add $name host entry"
bridge mdb replace dev br0 port br0 grp $grp $state vid 10 &> /dev/null
- check_fail $? "Managed to replace $name host entry"
+ check_err $? "Failed to replace $name host entry"
bridge mdb del dev br0 port br0 grp $grp $state vid 10
bridge mdb get dev br0 grp $grp vid 10 &> /dev/null
--
2.39.5
5 months, 3 weeks
- 1
- 0
[PATCH AUTOSEL 6.12 334/486] kunit: tool: Use qboot on QEMU x86_64
by Sasha Levin
From: Brendan Jackman <jackmanb(a)google.com>
[ Upstream commit 08fafac4c9f289a9d9a22d838921e4b3eb22c664 ]
As noted in [0], SeaBIOS (QEMU default) makes a mess of the terminal,
qboot does not.
It turns out this is actually useful with kunit.py, since the user is
exposed to this issue if they set --raw_output=all.
qboot is also faster than SeaBIOS, but it's is marginal for this
usecase.
[0] https://lore.kernel.org/all/CA+i-1C0wYb-gZ8Mwh3WSVpbk-LF-Uo+njVbASJPe1WXDUR…
Both SeaBIOS and qboot are x86-specific.
Link: https://lore.kernel.org/r/20250124-kunit-qboot-v1-1-815e4d4c6f7c@google.com
Signed-off-by: Brendan Jackman <jackmanb(a)google.com>
Reviewed-by: David Gow <davidgow(a)google.com>
Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal(a)kernel.org>
---
tools/testing/kunit/qemu_configs/x86_64.py | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/tools/testing/kunit/qemu_configs/x86_64.py b/tools/testing/kunit/qemu_configs/x86_64.py
index dc79490768630..4a6bf4e048f5b 100644
--- a/tools/testing/kunit/qemu_configs/x86_64.py
+++ b/tools/testing/kunit/qemu_configs/x86_64.py
@@ -7,4 +7,6 @@ CONFIG_SERIAL_8250_CONSOLE=y''',
qemu_arch='x86_64',
kernel_path='arch/x86/boot/bzImage',
kernel_command_line='console=ttyS0',
- extra_qemu_params=[])
+ # qboot is faster than SeaBIOS and doesn't mess up
+ # the terminal.
+ extra_qemu_params=['-bios', 'qboot.rom'])
--
2.39.5
5 months, 3 weeks
- 1
- 0
[PATCH AUTOSEL 6.12 239/486] selftests/net: have `gro.sh -t` return a correct exit code
by Sasha Levin
From: Kevin Krakauer <krakauer(a)google.com>
[ Upstream commit 784e6abd99f24024a8998b5916795f0bec9d2fd9 ]
Modify gro.sh to return a useful exit code when the -t flag is used. It
formerly returned 0 no matter what.
Tested: Ran `gro.sh -t large` and verified that test failures return 1.
Signed-off-by: Kevin Krakauer <krakauer(a)google.com>
Reviewed-by: Willem de Bruijn <willemb(a)google.com>
Link: https://patch.msgid.link/20250226192725.621969-2-krakauer@google.com
Signed-off-by: Jakub Kicinski <kuba(a)kernel.org>
Signed-off-by: Sasha Levin <sashal(a)kernel.org>
---
tools/testing/selftests/net/gro.sh | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/net/gro.sh b/tools/testing/selftests/net/gro.sh
index 02c21ff4ca81f..aabd6e5480b8e 100755
--- a/tools/testing/selftests/net/gro.sh
+++ b/tools/testing/selftests/net/gro.sh
@@ -100,5 +100,6 @@ trap cleanup EXIT
if [[ "${test}" == "all" ]]; then
run_all_tests
else
- run_test "${proto}" "${test}"
+ exit_code=$(run_test "${proto}" "${test}")
+ exit $exit_code
fi;
--
2.39.5
5 months, 3 weeks
- 1
- 0
[PATCH AUTOSEL 6.12 210/486] iommufd: Disallow allocating nested parent domain with fault ID
by Sasha Levin
From: Yi Liu <yi.l.liu(a)intel.com>
[ Upstream commit 1062d81086156e42878d701b816d2f368b53a77c ]
Allocating a domain with a fault ID indicates that the domain is faultable.
However, there is a gap for the nested parent domain to support PRI. Some
hardware lacks the capability to distinguish whether PRI occurs at stage 1
or stage 2. This limitation may require software-based page table walking
to resolve. Since no in-tree IOMMU driver currently supports this
functionality, it is disallowed. For more details, refer to the related
discussion at [1].
[1] https://lore.kernel.org/linux-iommu/bd1655c6-8b2f-4cfa-adb1-badc00d01811@in…
Link: https://patch.msgid.link/r/20250226104012.82079-1-yi.l.liu@intel.com
Suggested-by: Lu Baolu <baolu.lu(a)linux.intel.com>
Signed-off-by: Yi Liu <yi.l.liu(a)intel.com>
Reviewed-by: Kevin Tian <kevin.tian(a)intel.com>
Reviewed-by: Lu Baolu <baolu.lu(a)linux.intel.com>
Signed-off-by: Jason Gunthorpe <jgg(a)nvidia.com>
Signed-off-by: Sasha Levin <sashal(a)kernel.org>
---
drivers/iommu/iommufd/hw_pagetable.c | 3 +++
tools/testing/selftests/iommu/iommufd.c | 4 ++++
2 files changed, 7 insertions(+)
diff --git a/drivers/iommu/iommufd/hw_pagetable.c b/drivers/iommu/iommufd/hw_pagetable.c
index d06bf6e6c19fd..2454627a8b61b 100644
--- a/drivers/iommu/iommufd/hw_pagetable.c
+++ b/drivers/iommu/iommufd/hw_pagetable.c
@@ -122,6 +122,9 @@ iommufd_hwpt_paging_alloc(struct iommufd_ctx *ictx, struct iommufd_ioas *ioas,
if ((flags & IOMMU_HWPT_ALLOC_DIRTY_TRACKING) &&
!device_iommu_capable(idev->dev, IOMMU_CAP_DIRTY_TRACKING))
return ERR_PTR(-EOPNOTSUPP);
+ if ((flags & IOMMU_HWPT_FAULT_ID_VALID) &&
+ (flags & IOMMU_HWPT_ALLOC_NEST_PARENT))
+ return ERR_PTR(-EOPNOTSUPP);
hwpt_paging = __iommufd_object_alloc(
ictx, hwpt_paging, IOMMUFD_OBJ_HWPT_PAGING, common.obj);
diff --git a/tools/testing/selftests/iommu/iommufd.c b/tools/testing/selftests/iommu/iommufd.c
index 4927b9add5add..06f252733660a 100644
--- a/tools/testing/selftests/iommu/iommufd.c
+++ b/tools/testing/selftests/iommu/iommufd.c
@@ -289,6 +289,10 @@ TEST_F(iommufd_ioas, alloc_hwpt_nested)
&test_hwpt_id);
test_err_hwpt_alloc(EINVAL, self->device_id, self->device_id, 0,
&test_hwpt_id);
+ test_err_hwpt_alloc(EOPNOTSUPP, self->device_id, self->ioas_id,
+ IOMMU_HWPT_ALLOC_NEST_PARENT |
+ IOMMU_HWPT_FAULT_ID_VALID,
+ &test_hwpt_id);
test_cmd_hwpt_alloc(self->device_id, self->ioas_id,
IOMMU_HWPT_ALLOC_NEST_PARENT,
--
2.39.5
5 months, 3 weeks
- 1
- 0
[PATCH AUTOSEL 6.14 633/642] kernfs: Use RCU to access kernfs_node::parent.
by Sasha Levin
From: Sebastian Andrzej Siewior <bigeasy(a)linutronix.de>
[ Upstream commit 633488947ef66b194377411322dc9e12aab79b65 ]
kernfs_rename_lock is used to obtain stable kernfs_node::{name|parent}
pointer. This is a preparation to access kernfs_node::parent under RCU
and ensure that the pointer remains stable under the RCU lifetime
guarantees.
For a complete path, as it is done in kernfs_path_from_node(), the
kernfs_rename_lock is still required in order to obtain a stable parent
relationship while computing the relevant node depth. This must not
change while the nodes are inspected in order to build the path.
If the kernfs user never moves the nodes (changes the parent) then the
kernfs_rename_lock is not required and the RCU guarantees are
sufficient. This "restriction" can be set with
KERNFS_ROOT_INVARIANT_PARENT. Otherwise the lock is required.
Rename kernfs_node::parent to kernfs_node::__parent to denote the RCU
access and use RCU accessor while accessing the node.
Make cgroup use KERNFS_ROOT_INVARIANT_PARENT since the parent here can
not change.
Acked-by: Tejun Heo <tj(a)kernel.org>
Cc: Yonghong Song <yonghong.song(a)linux.dev>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy(a)linutronix.de>
Link: https://lore.kernel.org/r/20250213145023.2820193-6-bigeasy@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org>
Stable-dep-of: 6ef5b6fae304 ("kernfs: Drop kernfs_rwsem while invoking lookup_positive_unlocked().")
Signed-off-by: Sasha Levin <sashal(a)kernel.org>
---
arch/x86/kernel/cpu/resctrl/rdtgroup.c | 65 +++++++++----
fs/kernfs/dir.c | 96 ++++++++++++-------
fs/kernfs/kernfs-internal.h | 32 ++++++-
fs/kernfs/mount.c | 10 +-
fs/kernfs/symlink.c | 23 ++---
fs/sysfs/file.c | 24 +++--
include/linux/kernfs.h | 10 +-
kernel/cgroup/cgroup-v1.c | 2 +-
kernel/cgroup/cgroup.c | 24 ++++-
.../selftests/bpf/progs/profiler.inc.h | 2 +-
10 files changed, 195 insertions(+), 93 deletions(-)
diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
index 04b653d613e88..3d2a850ea737d 100644
--- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c
+++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
@@ -957,10 +957,20 @@ static int rdt_last_cmd_status_show(struct kernfs_open_file *of,
return 0;
}
+static void *rdt_kn_parent_priv(struct kernfs_node *kn)
+{
+ /*
+ * The parent pointer is only valid within RCU section since it can be
+ * replaced.
+ */
+ guard(rcu)();
+ return rcu_dereference(kn->__parent)->priv;
+}
+
static int rdt_num_closids_show(struct kernfs_open_file *of,
struct seq_file *seq, void *v)
{
- struct resctrl_schema *s = of->kn->parent->priv;
+ struct resctrl_schema *s = rdt_kn_parent_priv(of->kn);
seq_printf(seq, "%u\n", s->num_closid);
return 0;
@@ -969,7 +979,7 @@ static int rdt_num_closids_show(struct kernfs_open_file *of,
static int rdt_default_ctrl_show(struct kernfs_open_file *of,
struct seq_file *seq, void *v)
{
- struct resctrl_schema *s = of->kn->parent->priv;
+ struct resctrl_schema *s = rdt_kn_parent_priv(of->kn);
struct rdt_resource *r = s->res;
seq_printf(seq, "%x\n", r->default_ctrl);
@@ -979,7 +989,7 @@ static int rdt_default_ctrl_show(struct kernfs_open_file *of,
static int rdt_min_cbm_bits_show(struct kernfs_open_file *of,
struct seq_file *seq, void *v)
{
- struct resctrl_schema *s = of->kn->parent->priv;
+ struct resctrl_schema *s = rdt_kn_parent_priv(of->kn);
struct rdt_resource *r = s->res;
seq_printf(seq, "%u\n", r->cache.min_cbm_bits);
@@ -989,7 +999,7 @@ static int rdt_min_cbm_bits_show(struct kernfs_open_file *of,
static int rdt_shareable_bits_show(struct kernfs_open_file *of,
struct seq_file *seq, void *v)
{
- struct resctrl_schema *s = of->kn->parent->priv;
+ struct resctrl_schema *s = rdt_kn_parent_priv(of->kn);
struct rdt_resource *r = s->res;
seq_printf(seq, "%x\n", r->cache.shareable_bits);
@@ -1013,7 +1023,7 @@ static int rdt_shareable_bits_show(struct kernfs_open_file *of,
static int rdt_bit_usage_show(struct kernfs_open_file *of,
struct seq_file *seq, void *v)
{
- struct resctrl_schema *s = of->kn->parent->priv;
+ struct resctrl_schema *s = rdt_kn_parent_priv(of->kn);
/*
* Use unsigned long even though only 32 bits are used to ensure
* test_bit() is used safely.
@@ -1095,7 +1105,7 @@ static int rdt_bit_usage_show(struct kernfs_open_file *of,
static int rdt_min_bw_show(struct kernfs_open_file *of,
struct seq_file *seq, void *v)
{
- struct resctrl_schema *s = of->kn->parent->priv;
+ struct resctrl_schema *s = rdt_kn_parent_priv(of->kn);
struct rdt_resource *r = s->res;
seq_printf(seq, "%u\n", r->membw.min_bw);
@@ -1105,7 +1115,7 @@ static int rdt_min_bw_show(struct kernfs_open_file *of,
static int rdt_num_rmids_show(struct kernfs_open_file *of,
struct seq_file *seq, void *v)
{
- struct rdt_resource *r = of->kn->parent->priv;
+ struct rdt_resource *r = rdt_kn_parent_priv(of->kn);
seq_printf(seq, "%d\n", r->num_rmid);
@@ -1115,7 +1125,7 @@ static int rdt_num_rmids_show(struct kernfs_open_file *of,
static int rdt_mon_features_show(struct kernfs_open_file *of,
struct seq_file *seq, void *v)
{
- struct rdt_resource *r = of->kn->parent->priv;
+ struct rdt_resource *r = rdt_kn_parent_priv(of->kn);
struct mon_evt *mevt;
list_for_each_entry(mevt, &r->evt_list, list) {
@@ -1130,7 +1140,7 @@ static int rdt_mon_features_show(struct kernfs_open_file *of,
static int rdt_bw_gran_show(struct kernfs_open_file *of,
struct seq_file *seq, void *v)
{
- struct resctrl_schema *s = of->kn->parent->priv;
+ struct resctrl_schema *s = rdt_kn_parent_priv(of->kn);
struct rdt_resource *r = s->res;
seq_printf(seq, "%u\n", r->membw.bw_gran);
@@ -1140,7 +1150,7 @@ static int rdt_bw_gran_show(struct kernfs_open_file *of,
static int rdt_delay_linear_show(struct kernfs_open_file *of,
struct seq_file *seq, void *v)
{
- struct resctrl_schema *s = of->kn->parent->priv;
+ struct resctrl_schema *s = rdt_kn_parent_priv(of->kn);
struct rdt_resource *r = s->res;
seq_printf(seq, "%u\n", r->membw.delay_linear);
@@ -1158,7 +1168,7 @@ static int max_threshold_occ_show(struct kernfs_open_file *of,
static int rdt_thread_throttle_mode_show(struct kernfs_open_file *of,
struct seq_file *seq, void *v)
{
- struct resctrl_schema *s = of->kn->parent->priv;
+ struct resctrl_schema *s = rdt_kn_parent_priv(of->kn);
struct rdt_resource *r = s->res;
if (r->membw.throttle_mode == THREAD_THROTTLE_PER_THREAD)
@@ -1223,7 +1233,7 @@ static enum resctrl_conf_type resctrl_peer_type(enum resctrl_conf_type my_type)
static int rdt_has_sparse_bitmasks_show(struct kernfs_open_file *of,
struct seq_file *seq, void *v)
{
- struct resctrl_schema *s = of->kn->parent->priv;
+ struct resctrl_schema *s = rdt_kn_parent_priv(of->kn);
struct rdt_resource *r = s->res;
seq_printf(seq, "%u\n", r->cache.arch_has_sparse_bitmasks);
@@ -1635,7 +1645,7 @@ static int mbm_config_show(struct seq_file *s, struct rdt_resource *r, u32 evtid
static int mbm_total_bytes_config_show(struct kernfs_open_file *of,
struct seq_file *seq, void *v)
{
- struct rdt_resource *r = of->kn->parent->priv;
+ struct rdt_resource *r = rdt_kn_parent_priv(of->kn);
mbm_config_show(seq, r, QOS_L3_MBM_TOTAL_EVENT_ID);
@@ -1645,7 +1655,7 @@ static int mbm_total_bytes_config_show(struct kernfs_open_file *of,
static int mbm_local_bytes_config_show(struct kernfs_open_file *of,
struct seq_file *seq, void *v)
{
- struct rdt_resource *r = of->kn->parent->priv;
+ struct rdt_resource *r = rdt_kn_parent_priv(of->kn);
mbm_config_show(seq, r, QOS_L3_MBM_LOCAL_EVENT_ID);
@@ -1751,7 +1761,7 @@ static ssize_t mbm_total_bytes_config_write(struct kernfs_open_file *of,
char *buf, size_t nbytes,
loff_t off)
{
- struct rdt_resource *r = of->kn->parent->priv;
+ struct rdt_resource *r = rdt_kn_parent_priv(of->kn);
int ret;
/* Valid input requires a trailing newline */
@@ -1777,7 +1787,7 @@ static ssize_t mbm_local_bytes_config_write(struct kernfs_open_file *of,
char *buf, size_t nbytes,
loff_t off)
{
- struct rdt_resource *r = of->kn->parent->priv;
+ struct rdt_resource *r = rdt_kn_parent_priv(of->kn);
int ret;
/* Valid input requires a trailing newline */
@@ -2441,12 +2451,13 @@ static struct rdtgroup *kernfs_to_rdtgroup(struct kernfs_node *kn)
* resource. "info" and its subdirectories don't
* have rdtgroup structures, so return NULL here.
*/
- if (kn == kn_info || kn->parent == kn_info)
+ if (kn == kn_info ||
+ rcu_access_pointer(kn->__parent) == kn_info)
return NULL;
else
return kn->priv;
} else {
- return kn->parent->priv;
+ return rdt_kn_parent_priv(kn);
}
}
@@ -3772,9 +3783,18 @@ static int rdtgroup_rmdir_ctrl(struct rdtgroup *rdtgrp, cpumask_var_t tmpmask)
return 0;
}
+static struct kernfs_node *rdt_kn_parent(struct kernfs_node *kn)
+{
+ /*
+ * Valid within the RCU section it was obtained or while rdtgroup_mutex
+ * is held.
+ */
+ return rcu_dereference_check(kn->__parent, lockdep_is_held(&rdtgroup_mutex));
+}
+
static int rdtgroup_rmdir(struct kernfs_node *kn)
{
- struct kernfs_node *parent_kn = kn->parent;
+ struct kernfs_node *parent_kn;
struct rdtgroup *rdtgrp;
cpumask_var_t tmpmask;
int ret = 0;
@@ -3787,6 +3807,7 @@ static int rdtgroup_rmdir(struct kernfs_node *kn)
ret = -EPERM;
goto out;
}
+ parent_kn = rdt_kn_parent(kn);
/*
* If the rdtgroup is a ctrl_mon group and parent directory
@@ -3855,6 +3876,7 @@ static void mongrp_reparent(struct rdtgroup *rdtgrp,
static int rdtgroup_rename(struct kernfs_node *kn,
struct kernfs_node *new_parent, const char *new_name)
{
+ struct kernfs_node *kn_parent;
struct rdtgroup *new_prdtgrp;
struct rdtgroup *rdtgrp;
cpumask_var_t tmpmask;
@@ -3889,8 +3911,9 @@ static int rdtgroup_rename(struct kernfs_node *kn,
goto out;
}
- if (rdtgrp->type != RDTMON_GROUP || !kn->parent ||
- !is_mon_groups(kn->parent, kn->name)) {
+ kn_parent = rdt_kn_parent(kn);
+ if (rdtgrp->type != RDTMON_GROUP || !kn_parent ||
+ !is_mon_groups(kn_parent, kn->name)) {
rdt_last_cmd_puts("Source must be a MON group\n");
ret = -EPERM;
goto out;
diff --git a/fs/kernfs/dir.c b/fs/kernfs/dir.c
index 43fbada678381..1d370c497e8a3 100644
--- a/fs/kernfs/dir.c
+++ b/fs/kernfs/dir.c
@@ -17,7 +17,7 @@
#include "kernfs-internal.h"
-static DEFINE_RWLOCK(kernfs_rename_lock); /* kn->parent and ->name */
+DEFINE_RWLOCK(kernfs_rename_lock); /* kn->parent and ->name */
/*
* Don't use rename_lock to piggy back on pr_cont_buf. We don't want to
* call pr_cont() while holding rename_lock. Because sometimes pr_cont()
@@ -56,7 +56,7 @@ static int kernfs_name_locked(struct kernfs_node *kn, char *buf, size_t buflen)
if (!kn)
return strscpy(buf, "(null)", buflen);
- return strscpy(buf, kn->parent ? kn->name : "/", buflen);
+ return strscpy(buf, rcu_access_pointer(kn->__parent) ? kn->name : "/", buflen);
}
/* kernfs_node_depth - compute depth from @from to @to */
@@ -64,9 +64,9 @@ static size_t kernfs_depth(struct kernfs_node *from, struct kernfs_node *to)
{
size_t depth = 0;
- while (to->parent && to != from) {
+ while (rcu_dereference(to->__parent) && to != from) {
depth++;
- to = to->parent;
+ to = rcu_dereference(to->__parent);
}
return depth;
}
@@ -84,18 +84,18 @@ static struct kernfs_node *kernfs_common_ancestor(struct kernfs_node *a,
db = kernfs_depth(rb->kn, b);
while (da > db) {
- a = a->parent;
+ a = rcu_dereference(a->__parent);
da--;
}
while (db > da) {
- b = b->parent;
+ b = rcu_dereference(b->__parent);
db--;
}
/* worst case b and a will be the same at root */
while (b != a) {
- b = b->parent;
- a = a->parent;
+ b = rcu_dereference(b->__parent);
+ a = rcu_dereference(a->__parent);
}
return a;
@@ -168,8 +168,9 @@ static int kernfs_path_from_node_locked(struct kernfs_node *kn_to,
/* Calculate how many bytes we need for the rest */
for (i = depth_to - 1; i >= 0; i--) {
+
for (kn = kn_to, j = 0; j < i; j++)
- kn = kn->parent;
+ kn = rcu_dereference(kn->__parent);
len += scnprintf(buf + len, buflen - len, "/%s", kn->name);
}
@@ -226,6 +227,7 @@ int kernfs_path_from_node(struct kernfs_node *to, struct kernfs_node *from,
unsigned long flags;
int ret;
+ guard(rcu)();
read_lock_irqsave(&kernfs_rename_lock, flags);
ret = kernfs_path_from_node_locked(to, from, buf, buflen);
read_unlock_irqrestore(&kernfs_rename_lock, flags);
@@ -295,7 +297,7 @@ struct kernfs_node *kernfs_get_parent(struct kernfs_node *kn)
unsigned long flags;
read_lock_irqsave(&kernfs_rename_lock, flags);
- parent = kn->parent;
+ parent = kernfs_parent(kn);
kernfs_get(parent);
read_unlock_irqrestore(&kernfs_rename_lock, flags);
@@ -360,8 +362,12 @@ static int kernfs_sd_compare(const struct kernfs_node *left,
*/
static int kernfs_link_sibling(struct kernfs_node *kn)
{
- struct rb_node **node = &kn->parent->dir.children.rb_node;
struct rb_node *parent = NULL;
+ struct kernfs_node *kn_parent;
+ struct rb_node **node;
+
+ kn_parent = kernfs_parent(kn);
+ node = &kn_parent->dir.children.rb_node;
while (*node) {
struct kernfs_node *pos;
@@ -380,13 +386,13 @@ static int kernfs_link_sibling(struct kernfs_node *kn)
/* add new node and rebalance the tree */
rb_link_node(&kn->rb, parent, node);
- rb_insert_color(&kn->rb, &kn->parent->dir.children);
+ rb_insert_color(&kn->rb, &kn_parent->dir.children);
/* successfully added, account subdir number */
down_write(&kernfs_root(kn)->kernfs_iattr_rwsem);
if (kernfs_type(kn) == KERNFS_DIR)
- kn->parent->dir.subdirs++;
- kernfs_inc_rev(kn->parent);
+ kn_parent->dir.subdirs++;
+ kernfs_inc_rev(kn_parent);
up_write(&kernfs_root(kn)->kernfs_iattr_rwsem);
return 0;
@@ -407,16 +413,19 @@ static int kernfs_link_sibling(struct kernfs_node *kn)
*/
static bool kernfs_unlink_sibling(struct kernfs_node *kn)
{
+ struct kernfs_node *kn_parent;
+
if (RB_EMPTY_NODE(&kn->rb))
return false;
+ kn_parent = kernfs_parent(kn);
down_write(&kernfs_root(kn)->kernfs_iattr_rwsem);
if (kernfs_type(kn) == KERNFS_DIR)
- kn->parent->dir.subdirs--;
- kernfs_inc_rev(kn->parent);
+ kn_parent->dir.subdirs--;
+ kernfs_inc_rev(kn_parent);
up_write(&kernfs_root(kn)->kernfs_iattr_rwsem);
- rb_erase(&kn->rb, &kn->parent->dir.children);
+ rb_erase(&kn->rb, &kn_parent->dir.children);
RB_CLEAR_NODE(&kn->rb);
return true;
}
@@ -562,7 +571,7 @@ void kernfs_put(struct kernfs_node *kn)
* Moving/renaming is always done while holding reference.
* kn->parent won't change beneath us.
*/
- parent = kn->parent;
+ parent = kernfs_parent(kn);
WARN_ONCE(atomic_read(&kn->active) != KN_DEACTIVATED_BIAS,
"kernfs_put: %s/%s: released with incorrect active_ref %d\n",
@@ -701,7 +710,7 @@ struct kernfs_node *kernfs_new_node(struct kernfs_node *parent,
name, mode, uid, gid, flags);
if (kn) {
kernfs_get(parent);
- kn->parent = parent;
+ rcu_assign_pointer(kn->__parent, parent);
}
return kn;
}
@@ -769,13 +778,14 @@ struct kernfs_node *kernfs_find_and_get_node_by_id(struct kernfs_root *root,
*/
int kernfs_add_one(struct kernfs_node *kn)
{
- struct kernfs_node *parent = kn->parent;
- struct kernfs_root *root = kernfs_root(parent);
+ struct kernfs_root *root = kernfs_root(kn);
struct kernfs_iattrs *ps_iattr;
+ struct kernfs_node *parent;
bool has_ns;
int ret;
down_write(&root->kernfs_rwsem);
+ parent = kernfs_parent(kn);
ret = -EINVAL;
has_ns = kernfs_ns_enabled(parent);
@@ -949,6 +959,11 @@ struct kernfs_node *kernfs_walk_and_get_ns(struct kernfs_node *parent,
return kn;
}
+unsigned int kernfs_root_flags(struct kernfs_node *kn)
+{
+ return kernfs_root(kn)->flags;
+}
+
/**
* kernfs_create_root - create a new kernfs hierarchy
* @scops: optional syscall operations for the hierarchy
@@ -1112,7 +1127,7 @@ struct kernfs_node *kernfs_create_empty_dir(struct kernfs_node *parent,
static int kernfs_dop_revalidate(struct inode *dir, const struct qstr *name,
struct dentry *dentry, unsigned int flags)
{
- struct kernfs_node *kn;
+ struct kernfs_node *kn, *parent;
struct kernfs_root *root;
if (flags & LOOKUP_RCU)
@@ -1163,8 +1178,9 @@ static int kernfs_dop_revalidate(struct inode *dir, const struct qstr *name,
if (!kernfs_active(kn))
goto out_bad;
+ parent = kernfs_parent(kn);
/* The kernfs node has been moved? */
- if (kernfs_dentry_node(dentry->d_parent) != kn->parent)
+ if (kernfs_dentry_node(dentry->d_parent) != parent)
goto out_bad;
/* The kernfs node has been renamed */
@@ -1172,7 +1188,7 @@ static int kernfs_dop_revalidate(struct inode *dir, const struct qstr *name,
goto out_bad;
/* The kernfs node has been moved to a different namespace */
- if (kn->parent && kernfs_ns_enabled(kn->parent) &&
+ if (parent && kernfs_ns_enabled(parent) &&
kernfs_info(dentry->d_sb)->ns != kn->ns)
goto out_bad;
@@ -1365,7 +1381,7 @@ static struct kernfs_node *kernfs_next_descendant_post(struct kernfs_node *pos,
return kernfs_leftmost_descendant(rb_to_kn(rbn));
/* no sibling left, visit parent */
- return pos->parent;
+ return kernfs_parent(pos);
}
static void kernfs_activate_one(struct kernfs_node *kn)
@@ -1377,7 +1393,7 @@ static void kernfs_activate_one(struct kernfs_node *kn)
if (kernfs_active(kn) || (kn->flags & (KERNFS_HIDDEN | KERNFS_REMOVING)))
return;
- WARN_ON_ONCE(kn->parent && RB_EMPTY_NODE(&kn->rb));
+ WARN_ON_ONCE(rcu_access_pointer(kn->__parent) && RB_EMPTY_NODE(&kn->rb));
WARN_ON_ONCE(atomic_read(&kn->active) != KN_DEACTIVATED_BIAS);
atomic_sub(KN_DEACTIVATED_BIAS, &kn->active);
@@ -1447,7 +1463,7 @@ void kernfs_show(struct kernfs_node *kn, bool show)
static void __kernfs_remove(struct kernfs_node *kn)
{
- struct kernfs_node *pos;
+ struct kernfs_node *pos, *parent;
/* Short-circuit if non-root @kn has already finished removal. */
if (!kn)
@@ -1459,7 +1475,7 @@ static void __kernfs_remove(struct kernfs_node *kn)
* This is for kernfs_remove_self() which plays with active ref
* after removal.
*/
- if (kn->parent && RB_EMPTY_NODE(&kn->rb))
+ if (kernfs_parent(kn) && RB_EMPTY_NODE(&kn->rb))
return;
pr_debug("kernfs %s: removing\n", kn->name);
@@ -1485,14 +1501,14 @@ static void __kernfs_remove(struct kernfs_node *kn)
kernfs_get(pos);
kernfs_drain(pos);
-
+ parent = kernfs_parent(pos);
/*
* kernfs_unlink_sibling() succeeds once per node. Use it
* to decide who's responsible for cleanups.
*/
- if (!pos->parent || kernfs_unlink_sibling(pos)) {
+ if (!parent || kernfs_unlink_sibling(pos)) {
struct kernfs_iattrs *ps_iattr =
- pos->parent ? pos->parent->iattr : NULL;
+ parent ? parent->iattr : NULL;
/* update timestamps on the parent */
down_write(&kernfs_root(kn)->kernfs_iattr_rwsem);
@@ -1722,7 +1738,7 @@ int kernfs_rename_ns(struct kernfs_node *kn, struct kernfs_node *new_parent,
int error;
/* can't move or rename root */
- if (!kn->parent)
+ if (!rcu_access_pointer(kn->__parent))
return -EINVAL;
root = kernfs_root(kn);
@@ -1733,8 +1749,15 @@ int kernfs_rename_ns(struct kernfs_node *kn, struct kernfs_node *new_parent,
(new_parent->flags & KERNFS_EMPTY_DIR))
goto out;
+ old_parent = kernfs_parent(kn);
+ if (root->flags & KERNFS_ROOT_INVARIANT_PARENT) {
+ error = -EINVAL;
+ if (WARN_ON_ONCE(old_parent != new_parent))
+ goto out;
+ }
+
error = 0;
- if ((kn->parent == new_parent) && (kn->ns == new_ns) &&
+ if ((old_parent == new_parent) && (kn->ns == new_ns) &&
(strcmp(kn->name, new_name) == 0))
goto out; /* nothing to rename */
@@ -1761,8 +1784,8 @@ int kernfs_rename_ns(struct kernfs_node *kn, struct kernfs_node *new_parent,
/* rename_lock protects ->parent and ->name accessors */
write_lock_irq(&kernfs_rename_lock);
- old_parent = kn->parent;
- kn->parent = new_parent;
+ old_parent = kernfs_parent(kn);
+ rcu_assign_pointer(kn->__parent, new_parent);
kn->ns = new_ns;
if (new_name) {
@@ -1795,7 +1818,8 @@ static struct kernfs_node *kernfs_dir_pos(const void *ns,
{
if (pos) {
int valid = kernfs_active(pos) &&
- pos->parent == parent && hash == pos->hash;
+ rcu_access_pointer(pos->__parent) == parent &&
+ hash == pos->hash;
kernfs_put(pos);
if (!valid)
pos = NULL;
diff --git a/fs/kernfs/kernfs-internal.h b/fs/kernfs/kernfs-internal.h
index b42ee6547cdc1..c43bee18b79f7 100644
--- a/fs/kernfs/kernfs-internal.h
+++ b/fs/kernfs/kernfs-internal.h
@@ -19,6 +19,8 @@
#include <linux/kernfs.h>
#include <linux/fs_context.h>
+extern rwlock_t kernfs_rename_lock;
+
struct kernfs_iattrs {
kuid_t ia_uid;
kgid_t ia_gid;
@@ -64,11 +66,14 @@ struct kernfs_root {
*
* Return: the kernfs_root @kn belongs to.
*/
-static inline struct kernfs_root *kernfs_root(struct kernfs_node *kn)
+static inline struct kernfs_root *kernfs_root(const struct kernfs_node *kn)
{
+ const struct kernfs_node *knp;
/* if parent exists, it's always a dir; otherwise, @sd is a dir */
- if (kn->parent)
- kn = kn->parent;
+ guard(rcu)();
+ knp = rcu_dereference(kn->__parent);
+ if (knp)
+ kn = knp;
return kn->dir.root;
}
@@ -97,6 +102,27 @@ struct kernfs_super_info {
};
#define kernfs_info(SB) ((struct kernfs_super_info *)(SB->s_fs_info))
+static inline bool kernfs_root_is_locked(const struct kernfs_node *kn)
+{
+ return lockdep_is_held(&kernfs_root(kn)->kernfs_rwsem);
+}
+
+static inline struct kernfs_node *kernfs_parent(const struct kernfs_node *kn)
+{
+ /*
+ * The kernfs_node::__parent remains valid within a RCU section. The kn
+ * can be reparented (and renamed) which changes the entry. This can be
+ * avoided by locking kernfs_root::kernfs_rwsem or kernfs_rename_lock.
+ * Both locks can be used to obtain a reference on __parent. Once the
+ * reference count reaches 0 then the node is about to be freed
+ * and can not be renamed (or become a different parent) anymore.
+ */
+ return rcu_dereference_check(kn->__parent,
+ kernfs_root_is_locked(kn) ||
+ lockdep_is_held(&kernfs_rename_lock) ||
+ !atomic_read(&kn->count));
+}
+
static inline struct kernfs_node *kernfs_dentry_node(struct dentry *dentry)
{
if (d_really_is_negative(dentry))
diff --git a/fs/kernfs/mount.c b/fs/kernfs/mount.c
index 4a0ff08d589ca..2252b16e6ef0b 100644
--- a/fs/kernfs/mount.c
+++ b/fs/kernfs/mount.c
@@ -148,7 +148,7 @@ static struct dentry *kernfs_get_parent_dentry(struct dentry *child)
struct kernfs_root *root = kernfs_root(kn);
guard(rwsem_read)(&root->kernfs_rwsem);
- return d_obtain_alias(kernfs_get_inode(child->d_sb, kn->parent));
+ return d_obtain_alias(kernfs_get_inode(child->d_sb, kernfs_parent(kn)));
}
static const struct export_operations kernfs_export_ops = {
@@ -188,10 +188,10 @@ static struct kernfs_node *find_next_ancestor(struct kernfs_node *child,
return NULL;
}
- while (child->parent != parent) {
- if (!child->parent)
+ while (kernfs_parent(child) != parent) {
+ child = kernfs_parent(child);
+ if (!child)
return NULL;
- child = child->parent;
}
return child;
@@ -216,7 +216,7 @@ struct dentry *kernfs_node_dentry(struct kernfs_node *kn,
dentry = dget(sb->s_root);
/* Check if this is the root kernfs_node */
- if (!kn->parent)
+ if (!rcu_access_pointer(kn->__parent))
return dentry;
root = kernfs_root(kn);
diff --git a/fs/kernfs/symlink.c b/fs/kernfs/symlink.c
index 45371a70caa71..05c62ca93c53d 100644
--- a/fs/kernfs/symlink.c
+++ b/fs/kernfs/symlink.c
@@ -62,10 +62,10 @@ static int kernfs_get_target_path(struct kernfs_node *parent,
/* go up to the root, stop at the base */
base = parent;
- while (base->parent) {
- kn = target->parent;
- while (kn->parent && base != kn)
- kn = kn->parent;
+ while (kernfs_parent(base)) {
+ kn = kernfs_parent(target);
+ while (kernfs_parent(kn) && base != kn)
+ kn = kernfs_parent(kn);
if (base == kn)
break;
@@ -75,14 +75,14 @@ static int kernfs_get_target_path(struct kernfs_node *parent,
strcpy(s, "../");
s += 3;
- base = base->parent;
+ base = kernfs_parent(base);
}
/* determine end of target string for reverse fillup */
kn = target;
- while (kn->parent && kn != base) {
+ while (kernfs_parent(kn) && kn != base) {
len += strlen(kn->name) + 1;
- kn = kn->parent;
+ kn = kernfs_parent(kn);
}
/* check limits */
@@ -94,7 +94,7 @@ static int kernfs_get_target_path(struct kernfs_node *parent,
/* reverse fillup of target string from target to base */
kn = target;
- while (kn->parent && kn != base) {
+ while (kernfs_parent(kn) && kn != base) {
int slen = strlen(kn->name);
len -= slen;
@@ -102,7 +102,7 @@ static int kernfs_get_target_path(struct kernfs_node *parent,
if (len)
s[--len] = '/';
- kn = kn->parent;
+ kn = kernfs_parent(kn);
}
return 0;
@@ -111,12 +111,13 @@ static int kernfs_get_target_path(struct kernfs_node *parent,
static int kernfs_getlink(struct inode *inode, char *path)
{
struct kernfs_node *kn = inode->i_private;
- struct kernfs_node *parent = kn->parent;
+ struct kernfs_node *parent;
struct kernfs_node *target = kn->symlink.target_kn;
- struct kernfs_root *root = kernfs_root(parent);
+ struct kernfs_root *root = kernfs_root(kn);
int error;
down_read(&root->kernfs_rwsem);
+ parent = kernfs_parent(kn);
error = kernfs_get_target_path(parent, target, path);
up_read(&root->kernfs_rwsem);
diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index 6931308876c4a..c3d3b079aedde 100644
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -19,13 +19,19 @@
#include "sysfs.h"
+static struct kobject *sysfs_file_kobj(struct kernfs_node *kn)
+{
+ guard(rcu)();
+ return rcu_dereference(kn->__parent)->priv;
+}
+
/*
* Determine ktype->sysfs_ops for the given kernfs_node. This function
* must be called while holding an active reference.
*/
static const struct sysfs_ops *sysfs_file_ops(struct kernfs_node *kn)
{
- struct kobject *kobj = kn->parent->priv;
+ struct kobject *kobj = sysfs_file_kobj(kn);
if (kn->flags & KERNFS_LOCKDEP)
lockdep_assert_held(kn);
@@ -40,7 +46,7 @@ static const struct sysfs_ops *sysfs_file_ops(struct kernfs_node *kn)
static int sysfs_kf_seq_show(struct seq_file *sf, void *v)
{
struct kernfs_open_file *of = sf->private;
- struct kobject *kobj = of->kn->parent->priv;
+ struct kobject *kobj = sysfs_file_kobj(of->kn);
const struct sysfs_ops *ops = sysfs_file_ops(of->kn);
ssize_t count;
char *buf;
@@ -78,7 +84,7 @@ static ssize_t sysfs_kf_bin_read(struct kernfs_open_file *of, char *buf,
size_t count, loff_t pos)
{
struct bin_attribute *battr = of->kn->priv;
- struct kobject *kobj = of->kn->parent->priv;
+ struct kobject *kobj = sysfs_file_kobj(of->kn);
loff_t size = file_inode(of->file)->i_size;
if (!count)
@@ -105,7 +111,7 @@ static ssize_t sysfs_kf_read(struct kernfs_open_file *of, char *buf,
size_t count, loff_t pos)
{
const struct sysfs_ops *ops = sysfs_file_ops(of->kn);
- struct kobject *kobj = of->kn->parent->priv;
+ struct kobject *kobj = sysfs_file_kobj(of->kn);
ssize_t len;
/*
@@ -131,7 +137,7 @@ static ssize_t sysfs_kf_write(struct kernfs_open_file *of, char *buf,
size_t count, loff_t pos)
{
const struct sysfs_ops *ops = sysfs_file_ops(of->kn);
- struct kobject *kobj = of->kn->parent->priv;
+ struct kobject *kobj = sysfs_file_kobj(of->kn);
if (!count)
return 0;
@@ -144,7 +150,7 @@ static ssize_t sysfs_kf_bin_write(struct kernfs_open_file *of, char *buf,
size_t count, loff_t pos)
{
struct bin_attribute *battr = of->kn->priv;
- struct kobject *kobj = of->kn->parent->priv;
+ struct kobject *kobj = sysfs_file_kobj(of->kn);
loff_t size = file_inode(of->file)->i_size;
if (size) {
@@ -168,7 +174,7 @@ static int sysfs_kf_bin_mmap(struct kernfs_open_file *of,
struct vm_area_struct *vma)
{
struct bin_attribute *battr = of->kn->priv;
- struct kobject *kobj = of->kn->parent->priv;
+ struct kobject *kobj = sysfs_file_kobj(of->kn);
return battr->mmap(of->file, kobj, battr, vma);
}
@@ -177,7 +183,7 @@ static loff_t sysfs_kf_bin_llseek(struct kernfs_open_file *of, loff_t offset,
int whence)
{
struct bin_attribute *battr = of->kn->priv;
- struct kobject *kobj = of->kn->parent->priv;
+ struct kobject *kobj = sysfs_file_kobj(of->kn);
if (battr->llseek)
return battr->llseek(of->file, kobj, battr, offset, whence);
@@ -494,7 +500,7 @@ EXPORT_SYMBOL_GPL(sysfs_break_active_protection);
*/
void sysfs_unbreak_active_protection(struct kernfs_node *kn)
{
- struct kobject *kobj = kn->parent->priv;
+ struct kobject *kobj = sysfs_file_kobj(kn);
kernfs_unbreak_active_protection(kn);
kernfs_put(kn);
diff --git a/include/linux/kernfs.h b/include/linux/kernfs.h
index 87c79d076d6d7..5dda9a268e44c 100644
--- a/include/linux/kernfs.h
+++ b/include/linux/kernfs.h
@@ -147,6 +147,11 @@ enum kernfs_root_flag {
* Support user xattrs to be written to nodes rooted at this root.
*/
KERNFS_ROOT_SUPPORT_USER_XATTR = 0x0008,
+
+ /*
+ * Renames must not change the parent node.
+ */
+ KERNFS_ROOT_INVARIANT_PARENT = 0x0010,
};
/* type-specific structures for kernfs_node union members */
@@ -199,8 +204,8 @@ struct kernfs_node {
* never moved to a different parent, it is safe to access the
* parent directly.
*/
- struct kernfs_node *parent;
const char *name;
+ struct kernfs_node __rcu *__parent;
struct rb_node rb;
@@ -416,6 +421,7 @@ struct dentry *kernfs_node_dentry(struct kernfs_node *kn,
struct kernfs_root *kernfs_create_root(struct kernfs_syscall_ops *scops,
unsigned int flags, void *priv);
void kernfs_destroy_root(struct kernfs_root *root);
+unsigned int kernfs_root_flags(struct kernfs_node *kn);
struct kernfs_node *kernfs_create_dir_ns(struct kernfs_node *parent,
const char *name, umode_t mode,
@@ -514,6 +520,8 @@ kernfs_create_root(struct kernfs_syscall_ops *scops, unsigned int flags,
{ return ERR_PTR(-ENOSYS); }
static inline void kernfs_destroy_root(struct kernfs_root *root) { }
+static inline unsigned int kernfs_root_flags(struct kernfs_node *kn)
+{ return 0; }
static inline struct kernfs_node *
kernfs_create_dir_ns(struct kernfs_node *parent, const char *name,
diff --git a/kernel/cgroup/cgroup-v1.c b/kernel/cgroup/cgroup-v1.c
index e28d5f0d20ed0..c9752eb607ec9 100644
--- a/kernel/cgroup/cgroup-v1.c
+++ b/kernel/cgroup/cgroup-v1.c
@@ -844,7 +844,7 @@ static int cgroup1_rename(struct kernfs_node *kn, struct kernfs_node *new_parent
if (kernfs_type(kn) != KERNFS_DIR)
return -ENOTDIR;
- if (kn->parent != new_parent)
+ if (rcu_access_pointer(kn->__parent) != new_parent)
return -EIO;
/*
diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c
index 68d58753c75c3..ddaaeddf1afa8 100644
--- a/kernel/cgroup/cgroup.c
+++ b/kernel/cgroup/cgroup.c
@@ -633,9 +633,22 @@ int cgroup_task_count(const struct cgroup *cgrp)
return count;
}
+static struct cgroup *kn_priv(struct kernfs_node *kn)
+{
+ struct kernfs_node *parent;
+ /*
+ * The parent can not be replaced due to KERNFS_ROOT_INVARIANT_PARENT.
+ * Therefore it is always safe to dereference this pointer outside of a
+ * RCU section.
+ */
+ parent = rcu_dereference_check(kn->__parent,
+ kernfs_root_flags(kn) & KERNFS_ROOT_INVARIANT_PARENT);
+ return parent->priv;
+}
+
struct cgroup_subsys_state *of_css(struct kernfs_open_file *of)
{
- struct cgroup *cgrp = of->kn->parent->priv;
+ struct cgroup *cgrp = kn_priv(of->kn);
struct cftype *cft = of_cft(of);
/*
@@ -1612,7 +1625,7 @@ void cgroup_kn_unlock(struct kernfs_node *kn)
if (kernfs_type(kn) == KERNFS_DIR)
cgrp = kn->priv;
else
- cgrp = kn->parent->priv;
+ cgrp = kn_priv(kn);
cgroup_unlock();
@@ -1644,7 +1657,7 @@ struct cgroup *cgroup_kn_lock_live(struct kernfs_node *kn, bool drain_offline)
if (kernfs_type(kn) == KERNFS_DIR)
cgrp = kn->priv;
else
- cgrp = kn->parent->priv;
+ cgrp = kn_priv(kn);
/*
* We're gonna grab cgroup_mutex which nests outside kernfs
@@ -2118,7 +2131,8 @@ int cgroup_setup_root(struct cgroup_root *root, u16 ss_mask)
root->kf_root = kernfs_create_root(kf_sops,
KERNFS_ROOT_CREATE_DEACTIVATED |
KERNFS_ROOT_SUPPORT_EXPORTOP |
- KERNFS_ROOT_SUPPORT_USER_XATTR,
+ KERNFS_ROOT_SUPPORT_USER_XATTR |
+ KERNFS_ROOT_INVARIANT_PARENT,
root_cgrp);
if (IS_ERR(root->kf_root)) {
ret = PTR_ERR(root->kf_root);
@@ -4144,7 +4158,7 @@ static ssize_t cgroup_file_write(struct kernfs_open_file *of, char *buf,
size_t nbytes, loff_t off)
{
struct cgroup_file_ctx *ctx = of->priv;
- struct cgroup *cgrp = of->kn->parent->priv;
+ struct cgroup *cgrp = kn_priv(of->kn);
struct cftype *cft = of_cft(of);
struct cgroup_subsys_state *css;
int ret;
diff --git a/tools/testing/selftests/bpf/progs/profiler.inc.h b/tools/testing/selftests/bpf/progs/profiler.inc.h
index 8bd1ebd7d6afd..813143b4985dc 100644
--- a/tools/testing/selftests/bpf/progs/profiler.inc.h
+++ b/tools/testing/selftests/bpf/progs/profiler.inc.h
@@ -223,7 +223,7 @@ static INLINE void* read_full_cgroup_path(struct kernfs_node* cgroup_node,
if (bpf_cmp_likely(filepart_length, <=, MAX_PATH)) {
payload += filepart_length;
}
- cgroup_node = BPF_CORE_READ(cgroup_node, parent);
+ cgroup_node = BPF_CORE_READ(cgroup_node, __parent);
}
return payload;
}
--
2.39.5
5 months, 3 weeks
- 1
- 0
[PATCH AUTOSEL 6.14 551/642] bridge: mdb: Allow replace of a host-joined group
by Sasha Levin
From: Petr Machata <petrm(a)nvidia.com>
[ Upstream commit d9e9f6d7b7d0c520bb87f19d2cbc57aeeb2091d5 ]
Attempts to replace an MDB group membership of the host itself are
currently bounced:
# ip link add name br up type bridge vlan_filtering 1
# bridge mdb replace dev br port br grp 239.0.0.1 vid 2
# bridge mdb replace dev br port br grp 239.0.0.1 vid 2
Error: bridge: Group is already joined by host.
A similar operation done on a member port would succeed. Ignore the check
for replacement of host group memberships as well.
The bit of code that this enables is br_multicast_host_join(), which, for
already-joined groups only refreshes the MC group expiration timer, which
is desirable; and a userspace notification, also desirable.
Change a selftest that exercises this code path from expecting a rejection
to expecting a pass. The rest of MDB selftests pass without modification.
Signed-off-by: Petr Machata <petrm(a)nvidia.com>
Reviewed-by: Ido Schimmel <idosch(a)nvidia.com>
Acked-by: Nikolay Aleksandrov <razor(a)blackwall.org>
Link: https://patch.msgid.link/e5c5188b9787ae806609e7ca3aa2a0a501b9b5c4.173868564…
Signed-off-by: Jakub Kicinski <kuba(a)kernel.org>
Signed-off-by: Sasha Levin <sashal(a)kernel.org>
---
net/bridge/br_mdb.c | 2 +-
tools/testing/selftests/net/forwarding/bridge_mdb.sh | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/net/bridge/br_mdb.c b/net/bridge/br_mdb.c
index 1a52a0bca086d..7e1ad229e1330 100644
--- a/net/bridge/br_mdb.c
+++ b/net/bridge/br_mdb.c
@@ -1040,7 +1040,7 @@ static int br_mdb_add_group(const struct br_mdb_config *cfg,
/* host join */
if (!port) {
- if (mp->host_joined) {
+ if (mp->host_joined && !(cfg->nlflags & NLM_F_REPLACE)) {
NL_SET_ERR_MSG_MOD(extack, "Group is already joined by host");
return -EEXIST;
}
diff --git a/tools/testing/selftests/net/forwarding/bridge_mdb.sh b/tools/testing/selftests/net/forwarding/bridge_mdb.sh
index d9d587454d207..8c1597ebc2d38 100755
--- a/tools/testing/selftests/net/forwarding/bridge_mdb.sh
+++ b/tools/testing/selftests/net/forwarding/bridge_mdb.sh
@@ -149,7 +149,7 @@ cfg_test_host_common()
check_err $? "Failed to add $name host entry"
bridge mdb replace dev br0 port br0 grp $grp $state vid 10 &> /dev/null
- check_fail $? "Managed to replace $name host entry"
+ check_err $? "Failed to replace $name host entry"
bridge mdb del dev br0 port br0 grp $grp $state vid 10
bridge mdb get dev br0 grp $grp vid 10 &> /dev/null
--
2.39.5
5 months, 3 weeks
- 1
- 0
[PATCH AUTOSEL 6.14 533/642] netdevsim: allow normal queue reset while down
by Sasha Levin
From: Jakub Kicinski <kuba(a)kernel.org>
[ Upstream commit 285b3f78eabd951e59e98f01f86abaaa6c76cd44 ]
Resetting queues while the device is down should be legal.
Allow it, test it. Ideally we'd test this with a real device
supporting devmem but I don't have access to such devices.
Reviewed-by: Mina Almasry <almasrymina(a)google.com>
Link: https://patch.msgid.link/20250206225638.1387810-5-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba(a)kernel.org>
Signed-off-by: Sasha Levin <sashal(a)kernel.org>
---
drivers/net/netdevsim/netdev.c | 10 ++++------
tools/testing/selftests/net/nl_netdev.py | 18 +++++++++++++++++-
2 files changed, 21 insertions(+), 7 deletions(-)
diff --git a/drivers/net/netdevsim/netdev.c b/drivers/net/netdevsim/netdev.c
index e4c0d77849b82..a41dc79e9c2e0 100644
--- a/drivers/net/netdevsim/netdev.c
+++ b/drivers/net/netdevsim/netdev.c
@@ -664,8 +664,11 @@ nsim_queue_mem_alloc(struct net_device *dev, void *per_queue_mem, int idx)
if (ns->rq_reset_mode > 3)
return -EINVAL;
- if (ns->rq_reset_mode == 1)
+ if (ns->rq_reset_mode == 1) {
+ if (!netif_running(ns->netdev))
+ return -ENETDOWN;
return nsim_create_page_pool(&qmem->pp, &ns->rq[idx]->napi);
+ }
qmem->rq = nsim_queue_alloc();
if (!qmem->rq)
@@ -773,11 +776,6 @@ nsim_qreset_write(struct file *file, const char __user *data,
return -EINVAL;
rtnl_lock();
- if (!netif_running(ns->netdev)) {
- ret = -ENETDOWN;
- goto exit_unlock;
- }
-
if (queue >= ns->netdev->real_num_rx_queues) {
ret = -EINVAL;
goto exit_unlock;
diff --git a/tools/testing/selftests/net/nl_netdev.py b/tools/testing/selftests/net/nl_netdev.py
index 93e8cb671c3d9..beaee5e4e2aab 100755
--- a/tools/testing/selftests/net/nl_netdev.py
+++ b/tools/testing/selftests/net/nl_netdev.py
@@ -35,6 +35,21 @@ def napi_list_check(nf) -> None:
comment=f"queue count after reset queue {q} mode {i}")
+def nsim_rxq_reset_down(nf) -> None:
+ """
+ Test that the queue API supports resetting a queue
+ while the interface is down. We should convert this
+ test to testing real HW once more devices support
+ queue API.
+ """
+ with NetdevSimDev(queue_count=4) as nsimdev:
+ nsim = nsimdev.nsims[0]
+
+ ip(f"link set dev {nsim.ifname} down")
+ for i in [0, 2, 3]:
+ nsim.dfs_write("queue_reset", f"1 {i}")
+
+
def page_pool_check(nf) -> None:
with NetdevSimDev() as nsimdev:
nsim = nsimdev.nsims[0]
@@ -106,7 +121,8 @@ def page_pool_check(nf) -> None:
def main() -> None:
nf = NetdevFamily()
- ksft_run([empty_check, lo_check, page_pool_check, napi_list_check],
+ ksft_run([empty_check, lo_check, page_pool_check, napi_list_check,
+ nsim_rxq_reset_down],
args=(nf, ))
ksft_exit()
--
2.39.5
5 months, 3 weeks
- 1
- 0
[PATCH AUTOSEL 6.14 423/642] kunit: tool: Use qboot on QEMU x86_64
by Sasha Levin
From: Brendan Jackman <jackmanb(a)google.com>
[ Upstream commit 08fafac4c9f289a9d9a22d838921e4b3eb22c664 ]
As noted in [0], SeaBIOS (QEMU default) makes a mess of the terminal,
qboot does not.
It turns out this is actually useful with kunit.py, since the user is
exposed to this issue if they set --raw_output=all.
qboot is also faster than SeaBIOS, but it's is marginal for this
usecase.
[0] https://lore.kernel.org/all/CA+i-1C0wYb-gZ8Mwh3WSVpbk-LF-Uo+njVbASJPe1WXDUR…
Both SeaBIOS and qboot are x86-specific.
Link: https://lore.kernel.org/r/20250124-kunit-qboot-v1-1-815e4d4c6f7c@google.com
Signed-off-by: Brendan Jackman <jackmanb(a)google.com>
Reviewed-by: David Gow <davidgow(a)google.com>
Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal(a)kernel.org>
---
tools/testing/kunit/qemu_configs/x86_64.py | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/tools/testing/kunit/qemu_configs/x86_64.py b/tools/testing/kunit/qemu_configs/x86_64.py
index dc79490768630..4a6bf4e048f5b 100644
--- a/tools/testing/kunit/qemu_configs/x86_64.py
+++ b/tools/testing/kunit/qemu_configs/x86_64.py
@@ -7,4 +7,6 @@ CONFIG_SERIAL_8250_CONSOLE=y''',
qemu_arch='x86_64',
kernel_path='arch/x86/boot/bzImage',
kernel_command_line='console=ttyS0',
- extra_qemu_params=[])
+ # qboot is faster than SeaBIOS and doesn't mess up
+ # the terminal.
+ extra_qemu_params=['-bios', 'qboot.rom'])
--
2.39.5
5 months, 3 weeks
- 1
- 0
[PATCH AUTOSEL 6.14 300/642] selftests/net: have `gro.sh -t` return a correct exit code
by Sasha Levin
From: Kevin Krakauer <krakauer(a)google.com>
[ Upstream commit 784e6abd99f24024a8998b5916795f0bec9d2fd9 ]
Modify gro.sh to return a useful exit code when the -t flag is used. It
formerly returned 0 no matter what.
Tested: Ran `gro.sh -t large` and verified that test failures return 1.
Signed-off-by: Kevin Krakauer <krakauer(a)google.com>
Reviewed-by: Willem de Bruijn <willemb(a)google.com>
Link: https://patch.msgid.link/20250226192725.621969-2-krakauer@google.com
Signed-off-by: Jakub Kicinski <kuba(a)kernel.org>
Signed-off-by: Sasha Levin <sashal(a)kernel.org>
---
tools/testing/selftests/net/gro.sh | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/net/gro.sh b/tools/testing/selftests/net/gro.sh
index 02c21ff4ca81f..aabd6e5480b8e 100755
--- a/tools/testing/selftests/net/gro.sh
+++ b/tools/testing/selftests/net/gro.sh
@@ -100,5 +100,6 @@ trap cleanup EXIT
if [[ "${test}" == "all" ]]; then
run_all_tests
else
- run_test "${proto}" "${test}"
+ exit_code=$(run_test "${proto}" "${test}")
+ exit $exit_code
fi;
--
2.39.5
5 months, 3 weeks
- 1
- 0
[PATCH AUTOSEL 6.14 266/642] iommufd: Disallow allocating nested parent domain with fault ID
by Sasha Levin
From: Yi Liu <yi.l.liu(a)intel.com>
[ Upstream commit 1062d81086156e42878d701b816d2f368b53a77c ]
Allocating a domain with a fault ID indicates that the domain is faultable.
However, there is a gap for the nested parent domain to support PRI. Some
hardware lacks the capability to distinguish whether PRI occurs at stage 1
or stage 2. This limitation may require software-based page table walking
to resolve. Since no in-tree IOMMU driver currently supports this
functionality, it is disallowed. For more details, refer to the related
discussion at [1].
[1] https://lore.kernel.org/linux-iommu/bd1655c6-8b2f-4cfa-adb1-badc00d01811@in…
Link: https://patch.msgid.link/r/20250226104012.82079-1-yi.l.liu@intel.com
Suggested-by: Lu Baolu <baolu.lu(a)linux.intel.com>
Signed-off-by: Yi Liu <yi.l.liu(a)intel.com>
Reviewed-by: Kevin Tian <kevin.tian(a)intel.com>
Reviewed-by: Lu Baolu <baolu.lu(a)linux.intel.com>
Signed-off-by: Jason Gunthorpe <jgg(a)nvidia.com>
Signed-off-by: Sasha Levin <sashal(a)kernel.org>
---
drivers/iommu/iommufd/hw_pagetable.c | 3 +++
tools/testing/selftests/iommu/iommufd.c | 4 ++++
2 files changed, 7 insertions(+)
diff --git a/drivers/iommu/iommufd/hw_pagetable.c b/drivers/iommu/iommufd/hw_pagetable.c
index 598be26a14e28..9b5b0b8522299 100644
--- a/drivers/iommu/iommufd/hw_pagetable.c
+++ b/drivers/iommu/iommufd/hw_pagetable.c
@@ -126,6 +126,9 @@ iommufd_hwpt_paging_alloc(struct iommufd_ctx *ictx, struct iommufd_ioas *ioas,
if ((flags & IOMMU_HWPT_ALLOC_DIRTY_TRACKING) &&
!device_iommu_capable(idev->dev, IOMMU_CAP_DIRTY_TRACKING))
return ERR_PTR(-EOPNOTSUPP);
+ if ((flags & IOMMU_HWPT_FAULT_ID_VALID) &&
+ (flags & IOMMU_HWPT_ALLOC_NEST_PARENT))
+ return ERR_PTR(-EOPNOTSUPP);
hwpt_paging = __iommufd_object_alloc(
ictx, hwpt_paging, IOMMUFD_OBJ_HWPT_PAGING, common.obj);
diff --git a/tools/testing/selftests/iommu/iommufd.c b/tools/testing/selftests/iommu/iommufd.c
index a1b2b657999dc..618c03bb6509b 100644
--- a/tools/testing/selftests/iommu/iommufd.c
+++ b/tools/testing/selftests/iommu/iommufd.c
@@ -439,6 +439,10 @@ TEST_F(iommufd_ioas, alloc_hwpt_nested)
&test_hwpt_id);
test_err_hwpt_alloc(EINVAL, self->device_id, self->device_id, 0,
&test_hwpt_id);
+ test_err_hwpt_alloc(EOPNOTSUPP, self->device_id, self->ioas_id,
+ IOMMU_HWPT_ALLOC_NEST_PARENT |
+ IOMMU_HWPT_FAULT_ID_VALID,
+ &test_hwpt_id);
test_cmd_hwpt_alloc(self->device_id, self->ioas_id,
IOMMU_HWPT_ALLOC_NEST_PARENT,
--
2.39.5
5 months, 3 weeks
- 1
- 0
[PATCH AUTOSEL 6.14 215/642] selftests: pci_endpoint: Skip disabled BARs
by Sasha Levin
From: Niklas Cassel <cassel(a)kernel.org>
[ Upstream commit af1451b6738ec7cf91f2914f53845424959ec4ee ]
Currently BARs that have been disabled by the endpoint controller driver
will result in a test FAIL.
Returning FAIL for a BAR that is disabled seems overly pessimistic.
There are EPC that disables one or more BARs intentionally.
One reason for this is that there are certain EPCs that are hardwired to
expose internal PCIe controller registers over a certain BAR, so the EPC
driver disables such a BAR, such that the host will not overwrite random
registers during testing.
Such a BAR will be disabled by the EPC driver's init function, and the
BAR will be marked as BAR_RESERVED, such that it will be unavailable to
endpoint function drivers.
Let's return FAIL only for BARs that are actually enabled and failed the
test, and let's return skip for BARs that are not even enabled.
Signed-off-by: Niklas Cassel <cassel(a)kernel.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam(a)linaro.org>
Link: https://lore.kernel.org/r/20250123120147.3603409-4-cassel@kernel.org
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam(a)linaro.org>
Signed-off-by: Krzysztof Wilczyński <kwilczynski(a)kernel.org>
Signed-off-by: Sasha Levin <sashal(a)kernel.org>
---
tools/testing/selftests/pci_endpoint/pci_endpoint_test.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/tools/testing/selftests/pci_endpoint/pci_endpoint_test.c b/tools/testing/selftests/pci_endpoint/pci_endpoint_test.c
index c267b822c1081..576c590b277b1 100644
--- a/tools/testing/selftests/pci_endpoint/pci_endpoint_test.c
+++ b/tools/testing/selftests/pci_endpoint/pci_endpoint_test.c
@@ -65,6 +65,8 @@ TEST_F(pci_ep_bar, BAR_TEST)
int ret;
pci_ep_ioctl(PCITEST_BAR, variant->barno);
+ if (ret == -ENODATA)
+ SKIP(return, "BAR is disabled");
EXPECT_FALSE(ret) TH_LOG("Test failed for BAR%d", variant->barno);
}
--
2.39.5
5 months, 3 weeks
- 1
- 0
[PATCH AUTOSEL 6.14 139/642] kunit: tool: Fix bug in parsing test plan
by Sasha Levin
From: Rae Moar <rmoar(a)google.com>
[ Upstream commit 1d4c06d51963f89f67c7b75d5c0c34e9d1bb2ae6 ]
A bug was identified where the KTAP below caused an infinite loop:
TAP version 13
ok 4 test_case
1..4
The infinite loop was caused by the parser not parsing a test plan
if following a test result line.
Fix this bug by parsing test plan line to avoid the infinite loop.
Link: https://lore.kernel.org/r/20250313192714.1380005-1-rmoar@google.com
Signed-off-by: Rae Moar <rmoar(a)google.com>
Reviewed-by: David Gow <davidgow(a)google.com>
Signed-off-by: Shuah Khan <shuah(a)kernel.org>
Signed-off-by: Sasha Levin <sashal(a)kernel.org>
---
tools/testing/kunit/kunit_parser.py | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
diff --git a/tools/testing/kunit/kunit_parser.py b/tools/testing/kunit/kunit_parser.py
index 29fc27e8949bd..da53a709773a2 100644
--- a/tools/testing/kunit/kunit_parser.py
+++ b/tools/testing/kunit/kunit_parser.py
@@ -759,7 +759,7 @@ def parse_test(lines: LineStream, expected_num: int, log: List[str], is_subtest:
# If parsing the main/top-level test, parse KTAP version line and
# test plan
test.name = "main"
- ktap_line = parse_ktap_header(lines, test, printer)
+ parse_ktap_header(lines, test, printer)
test.log.extend(parse_diagnostic(lines))
parse_test_plan(lines, test)
parent_test = True
@@ -768,13 +768,12 @@ def parse_test(lines: LineStream, expected_num: int, log: List[str], is_subtest:
# the KTAP version line and/or subtest header line
ktap_line = parse_ktap_header(lines, test, printer)
subtest_line = parse_test_header(lines, test)
+ test.log.extend(parse_diagnostic(lines))
+ parse_test_plan(lines, test)
parent_test = (ktap_line or subtest_line)
if parent_test:
- # If KTAP version line and/or subtest header is found, attempt
- # to parse test plan and print test header
- test.log.extend(parse_diagnostic(lines))
- parse_test_plan(lines, test)
print_test_header(test, printer)
+
expected_count = test.expected_count
subtests = []
test_num = 1
--
2.39.5
5 months, 3 weeks
- 1
- 0
[PATCH v3 0/8] perform /proc/pid/maps read and PROCMAP_QUERY under RCU
by Suren Baghdasaryan
After a long delay I'm posting next iteration of lockless /proc/pid/maps
reading patchset. Differences from v2 [1]:
- Add a set of tests concurrently modifying address space and checking for
correct reading results;
- Use new mmap_lock_speculate_xxx APIs for concurrent change detection and
retries;
- Add lockless PROCMAP_QUERY execution support;
The new tests are designed to check for any unexpected data tearing while
performing some common address space modifications (vma split, resize and
remap). Even before these changes, reading /proc/pid/maps might have
inconsistent data because the file is read page-by-page with mmap_lock
being dropped between the pages. Such tearing is expected and userspace
is supposed to deal with that possibility. An example of user-visible
inconsistency can be that the same vma is printed twice: once before
it was modified and then after the modifications. For example if vma was
extended, it might be found and reported twice. Whan is not expected is
to see a gap where there should have been a vma both before and after
modification. This patchset increases the chances of such tearing,
therefore it's event more important now to test for unexpected
inconsistencies.
Thanks to Paul McKenney who developed a benchmark to test performance
of concurrent reads and updates, we also have data on performance
benefits:
The test has a pair of processes scanning /proc/PID/maps, and another
process unmapping and remapping 4K pages from a 128MB range of anonymous
memory. At the end of each 10-second run, the latency of each mmap()
or munmap() operation is measured, and for each run the maximum and mean
latency is printed. (Yes, the map/unmap process is started first, its
PID is passed to the scanners, and then the map/unmap process waits until
both scanners are running before starting its timed test. The scanners
keep scanning until the specified /proc/PID/maps file disappears.)
In summary, with stock mm, 78% of the runs had maximum latencies in
excess of 0.5 milliseconds, and with more then half of the runs' latencies
exceeding a full millisecond. In contrast, 98% of the runs with Suren's
patch series applied had maximum latencies of less than 0.5 milliseconds.
From a median-performance viewpoint, Suren's series also looks good,
with stock mm weighing in at 13 microseconds and Suren's series at 10
microseconds, better than a 20% improvement.
[1] https://lore.kernel.org/all/20240123231014.3801041-1-surenb@google.com/
Suren Baghdasaryan (8):
selftests/proc: add /proc/pid/maps tearing from vma split test
selftests/proc: extend /proc/pid/maps tearing test to include vma
resizing
selftests/proc: extend /proc/pid/maps tearing test to include vma
remapping
selftests/proc: test PROCMAP_QUERY ioctl while vma is concurrently
modified
selftests/proc: add verbose more for tests to facilitate debugging
mm: make vm_area_struct anon_name field RCU-safe
mm/maps: read proc/pid/maps under RCU
mm/maps: execute PROCMAP_QUERY ioctl under RCU
fs/proc/internal.h | 6 +
fs/proc/task_mmu.c | 233 +++++-
include/linux/mm_inline.h | 28 +-
include/linux/mm_types.h | 3 +-
mm/madvise.c | 30 +-
tools/testing/selftests/proc/proc-pid-vm.c | 793 ++++++++++++++++++++-
6 files changed, 1061 insertions(+), 32 deletions(-)
base-commit: 79f35c4125a9a3fd98efeed4cce1cd7ce5311a44
--
2.49.0.805.g082f7c87e0-goog
5 months, 3 weeks
- 6
- 38
[PATCH bpf-next v2 0/3] Allow mmap of /sys/kernel/btf/vmlinux
by Lorenz Bauer
I'd like to cut down the memory usage of parsing vmlinux BTF in ebpf-go.
With some upcoming changes the library is sitting at 5MiB for a parse.
Most of that memory is simply copying the BTF blob into user space.
By allowing vmlinux BTF to be mmapped read-only into user space I can
cut memory usage by about 75%.
Signed-off-by: Lorenz Bauer <lmb(a)isovalent.com>
---
Changes in v2:
- Use btf__new in selftest
- Avoid vm_iomap_memory in btf_vmlinux_mmap
- Add VM_DONTDUMP
- Add support to libbpf
- Link to v1: https://lore.kernel.org/r/20250501-vmlinux-mmap-v1-0-aa2724572598@isovalent…
---
Lorenz Bauer (3):
btf: allow mmap of vmlinux btf
selftests: bpf: add a test for mmapable vmlinux BTF
libbpf: Use mmap to parse vmlinux BTF from sysfs
include/asm-generic/vmlinux.lds.h | 3 +-
kernel/bpf/sysfs_btf.c | 36 +++++++++-
tools/lib/bpf/btf.c | 82 +++++++++++++++++++---
tools/testing/selftests/bpf/prog_tests/btf_sysfs.c | 82 ++++++++++++++++++++++
4 files changed, 189 insertions(+), 14 deletions(-)
---
base-commit: 38d976c32d85ef12dcd2b8a231196f7049548477
change-id: 20250501-vmlinux-mmap-2ec5563c3ef1
Best regards,
--
Lorenz Bauer <lmb(a)isovalent.com>
5 months, 3 weeks
- 2
- 7
[PATCH v5 00/25] context_tracking,x86: Defer some IPIs until a user->kernel transition
by Valentin Schneider
Context
=======
We've observed within Red Hat that isolated, NOHZ_FULL CPUs running a
pure-userspace application get regularly interrupted by IPIs sent from
housekeeping CPUs. Those IPIs are caused by activity on the housekeeping CPUs
leading to various on_each_cpu() calls, e.g.:
64359.052209596 NetworkManager 0 1405 smp_call_function_many_cond (cpu=0, func=do_kernel_range_flush)
smp_call_function_many_cond+0x1
smp_call_function+0x39
on_each_cpu+0x2a
flush_tlb_kernel_range+0x7b
__purge_vmap_area_lazy+0x70
_vm_unmap_aliases.part.42+0xdf
change_page_attr_set_clr+0x16a
set_memory_ro+0x26
bpf_int_jit_compile+0x2f9
bpf_prog_select_runtime+0xc6
bpf_prepare_filter+0x523
sk_attach_filter+0x13
sock_setsockopt+0x92c
__sys_setsockopt+0x16a
__x64_sys_setsockopt+0x20
do_syscall_64+0x87
entry_SYSCALL_64_after_hwframe+0x65
The heart of this series is the thought that while we cannot remove NOHZ_FULL
CPUs from the list of CPUs targeted by these IPIs, they may not have to execute
the callbacks immediately. Anything that only affects kernelspace can wait
until the next user->kernel transition, providing it can be executed "early
enough" in the entry code.
The original implementation is from Peter [1]. Nicolas then added kernel TLB
invalidation deferral to that [2], and I picked it up from there.
Deferral approach
=================
Storing each and every callback, like a secondary call_single_queue turned out
to be a no-go: the whole point of deferral is to keep NOHZ_FULL CPUs in
userspace for as long as possible - no signal of any form would be sent when
deferring an IPI. This means that any form of queuing for deferred callbacks
would end up as a convoluted memory leak.
Deferred IPIs must thus be coalesced, which this series achieves by assigning
IPIs a "type" and having a mapping of IPI type to callback, leveraged upon
kernel entry.
What about IPIs whose callback take a parameter, you may ask?
Peter suggested during OSPM23 [3] that since on_each_cpu() targets
housekeeping CPUs *and* isolated CPUs, isolated CPUs can access either global or
housekeeping-CPU-local state to "reconstruct" the data that would have been sent
via the IPI.
This series does not affect any IPI callback that requires an argument, but the
approach would remain the same (one coalescable callback executed on kernel
entry).
Kernel entry vs execution of the deferred operation
===================================================
This is what I've referred to as the "Danger Zone" during my LPC24 talk [4].
There is a non-zero length of code that is executed upon kernel entry before the
deferred operation can be itself executed (before we start getting into
context_tracking.c proper), i.e.:
idtentry_func_foo() <--- we're in the kernel
irqentry_enter()
enter_from_user_mode()
__ct_user_exit()
ct_kernel_enter_state()
ct_work_flush() <--- deferred operation is executed here
This means one must take extra care to what can happen in the early entry code,
and that <bad things> cannot happen. For instance, we really don't want to hit
instructions that have been modified by a remote text_poke() while we're on our
way to execute a deferred sync_core(). Patches doing the actual deferral have
more detail on this.
Where are we at with this whole thing?
======================================
Dave has been incredibly helpful wrt figuring out what would and wouldn't
(mostly that) be safe to do for deferring kernel range TLB flush IPIs, see [5].
Long story short, there are ugly things I can still do to (safely) defer the TLB
flush IPIs, but it's going to be a long session of pulling my own hair out, and
I got plenty so I won't be done for a while.
In the meantime, I think everything leading up to deferring text poke IPIs is
sane-ish and could get in. I'm not the biggest fan of adding an API with a
single user, but hey, I've been working on this for "a little while" now and
I'll still need to get the other IPIs sorted out.
TL;DR: Text patching IPI deferral LGTM so here it is for now, I'm still working
on the TLB flush thing.
Patches
=======
o Patches 1-2 are standalone objtool cleanups.
o Patches 3-4 add an RCU testing feature.
o Patches 5-6 add infrastructure for annotating static keys and static calls
that may be used in noinstr code (courtesy of Josh).
o Patches 7-20 use said annotations on relevant keys / calls.
o Patch 21 enforces proper usage of said annotations (courtesy of Josh).
o Patches 22-23 deal with detecting NOINSTR text in modules
o Patches 24-25 add the actual IPI deferral faff
Patches are also available at:
https://gitlab.com/vschneid/linux.git -b redhat/isolirq/defer/v5
Testing
=======
Xeon E5-2699 system with SMToff, NOHZ_FULL, isolated CPUs.
RHEL10 userspace.
Workload is using rteval (kernel compilation + hackbench) on housekeeping CPUs
and a dummy stay-in-userspace loop on the isolated CPUs. The main invocation is:
$ trace-cmd record -e "csd_queue_cpu" -f "cpu & CPUS{$ISOL_CPUS}" \
-e "ipi_send_cpumask" -f "cpumask & CPUS{$ISOL_CPUS}" \
-e "ipi_send_cpu" -f "cpu & CPUS{$ISOL_CPUS}" \
rteval --onlyload --loads-cpulist=$HK_CPUS \
--hackbench-runlowmem=True --duration=$DURATION
This only records IPIs sent to isolated CPUs, so any event there is interference
(with a bit of fuzz at the start/end of the workload when spawning the
processes). All tests were done with a duration of 3 hours.
v6.14
# This is the actual IPI count
$ trace-cmd report | grep callback | awk '{ print $(NF) }' | sort | uniq -c | sort -nr
93 callback=generic_smp_call_function_single_interrupt+0x0
22 callback=nohz_full_kick_func+0x0
# These are the different CSD's that caused IPIs
$ trace-cmd report | grep csd_queue | awk '{ print $(NF-1) }' | sort | uniq -c | sort -nr
1456 func=do_flush_tlb_all
78 func=do_sync_core
33 func=nohz_full_kick_func
26 func=do_kernel_range_flush
v6.14 + patches
# This is the actual IPI count
$ trace-cmd report | grep callback | awk '{ print $(NF) }' | sort | uniq -c | sort -nr
86 callback=generic_smp_call_function_single_interrupt+0x0
41 callback=nohz_full_kick_func+0x0
# These are the different CSD's that caused IPIs
$ trace-cmd report | grep csd_queue | awk '{ print $(NF-1) }' | sort | uniq -c | sort -nr
1378 func=do_flush_tlb_all
33 func=nohz_full_kick_func
So the TLB flush is still there driving most of the IPIs, but at least the
instruction patching IPIs are gone. With kernel TLB flushes deferred, there are
no IPIs sent to isolated CPUs in that 3hr window, but as stated above that still
needs some more work.
Also note that tlb_remove_table_smp_sync() showed up during testing of v3, and
has gone as mysteriously as it showed up. Yair had a series adressing this [6]
which per these results would be worth revisiting.
Acknowledgements
================
Special thanks to:
o Clark Williams for listening to my ramblings about this and throwing ideas my way
o Josh Poimboeuf for all his help with everything objtool-related
o All of the folks who attended various (too many?) talks about this and
provided precious feedback.
o The mm folks for pointing out what I can and can't do with TLB flushes
Links
=====
[1]: https://lore.kernel.org/all/20210929151723.162004989@infradead.org/
[2]: https://github.com/vianpl/linux.git -b ct-work-defer-wip
[3]: https://youtu.be/0vjE6fjoVVE
[4]: https://lpc.events/event/18/contributions/1889/
[5]: http://lore.kernel.org/r/eef09bdc-7546-462b-9ac0-661a44d2ceae@intel.com
[6]: https://lore.kernel.org/lkml/20230620144618.125703-1-ypodemsk@redhat.com/
Revisions
=========
v4 -> v5
++++++++
o Rebased onto v6.15-rc3
o Collected Reviewed-by
o Annotated a few more static keys
o Added proper checking of noinstr sections that are in loadable code such as
KVM early entry (Sean Christopherson)
o Switched to checking for CT_RCU_WATCHING instead of CT_STATE_KERNEL or
CT_STATE_IDLE, which means deferral is now behaving sanely for IRQ/NMI
entry from idle (thanks to Frederic!)
o Ditched the vmap TLB flush deferral (for now)
RFCv3 -> v4
+++++++++++
o Rebased onto v6.13-rc6
o New objtool patches from Josh
o More .noinstr static key/call patches
o Static calls now handled as well (again thanks to Josh)
o Fixed clearing the work bits on kernel exit
o Messed with IRQ hitting an idle CPU vs context tracking
o Various comment and naming cleanups
o Made RCU_DYNTICKS_TORTURE depend on !COMPILE_TEST (PeterZ)
o Fixed the CT_STATE_KERNEL check when setting a deferred work (Frederic)
o Cleaned up the __flush_tlb_all() mess thanks to PeterZ
RFCv2 -> RFCv3
++++++++++++++
o Rebased onto v6.12-rc6
o Added objtool documentation for the new warning (Josh)
o Added low-size RCU watching counter to TREE04 torture scenario (Paul)
o Added FORCEFUL jump label and static key types
o Added noinstr-compliant helpers for tlb flush deferral
RFCv1 -> RFCv2
++++++++++++++
o Rebased onto v6.5-rc1
o Updated the trace filter patches (Steven)
o Fixed __ro_after_init keys used in modules (Peter)
o Dropped the extra context_tracking atomic, squashed the new bits in the
existing .state field (Peter, Frederic)
o Added an RCU_EXPERT config for the RCU dynticks counter size, and added an
rcutorture case for a low-size counter (Paul)
o Fixed flush_tlb_kernel_range_deferrable() definition
Josh Poimboeuf (3):
jump_label: Add annotations for validating noinstr usage
static_call: Add read-only-after-init static calls
objtool: Add noinstr validation for static branches/calls
Valentin Schneider (22):
objtool: Make validate_call() recognize indirect calls to pv_ops[]
objtool: Flesh out warning related to pv_ops[] calls
rcu: Add a small-width RCU watching counter debug option
rcutorture: Make TREE04 use CONFIG_RCU_DYNTICKS_TORTURE
x86/paravirt: Mark pv_sched_clock static call as __ro_after_init
x86/idle: Mark x86_idle static call as __ro_after_init
x86/paravirt: Mark pv_steal_clock static call as __ro_after_init
riscv/paravirt: Mark pv_steal_clock static call as __ro_after_init
loongarch/paravirt: Mark pv_steal_clock static call as __ro_after_init
arm64/paravirt: Mark pv_steal_clock static call as __ro_after_init
arm/paravirt: Mark pv_steal_clock static call as __ro_after_init
perf/x86/amd: Mark perf_lopwr_cb static call as __ro_after_init
sched/clock: Mark sched_clock_running key as __ro_after_init
KVM: VMX: Mark __kvm_is_using_evmcs static key as __ro_after_init
x86/speculation/mds: Mark mds_idle_clear key as allowed in .noinstr
sched/clock, x86: Mark __sched_clock_stable key as allowed in .noinstr
KVM: VMX: Mark vmx_l1d_should flush and vmx_l1d_flush_cond keys as
allowed in .noinstr
stackleack: Mark stack_erasing_bypass key as allowed in .noinstr
module: Remove outdated comment about text_size
module: Add MOD_NOINSTR_TEXT mem_type
context-tracking: Introduce work deferral infrastructure
context_tracking,x86: Defer kernel text patching IPIs
arch/Kconfig | 9 ++
arch/arm/kernel/paravirt.c | 2 +-
arch/arm64/kernel/paravirt.c | 2 +-
arch/loongarch/kernel/paravirt.c | 2 +-
arch/riscv/kernel/paravirt.c | 2 +-
arch/x86/Kconfig | 1 +
arch/x86/events/amd/brs.c | 2 +-
arch/x86/include/asm/context_tracking_work.h | 18 +++
arch/x86/include/asm/text-patching.h | 1 +
arch/x86/kernel/alternative.c | 39 ++++++-
arch/x86/kernel/cpu/bugs.c | 2 +-
arch/x86/kernel/kprobes/core.c | 4 +-
arch/x86/kernel/kprobes/opt.c | 4 +-
arch/x86/kernel/module.c | 2 +-
arch/x86/kernel/paravirt.c | 4 +-
arch/x86/kernel/process.c | 2 +-
arch/x86/kvm/vmx/vmx.c | 11 +-
arch/x86/kvm/vmx/vmx_onhyperv.c | 2 +-
include/asm-generic/sections.h | 15 +++
include/linux/context_tracking.h | 21 ++++
include/linux/context_tracking_state.h | 54 +++++++--
include/linux/context_tracking_work.h | 26 +++++
include/linux/jump_label.h | 30 ++++-
include/linux/module.h | 6 +-
include/linux/objtool.h | 7 ++
include/linux/static_call.h | 19 ++++
kernel/context_tracking.c | 69 +++++++++++-
kernel/kprobes.c | 8 +-
kernel/module/main.c | 85 ++++++++++----
kernel/rcu/Kconfig.debug | 15 +++
kernel/sched/clock.c | 7 +-
kernel/stackleak.c | 6 +-
kernel/time/Kconfig | 5 +
tools/objtool/Documentation/objtool.txt | 34 ++++++
tools/objtool/check.c | 106 +++++++++++++++---
tools/objtool/include/objtool/check.h | 1 +
tools/objtool/include/objtool/elf.h | 1 +
tools/objtool/include/objtool/special.h | 1 +
tools/objtool/special.c | 15 ++-
.../selftests/rcutorture/configs/rcu/TREE04 | 1 +
40 files changed, 557 insertions(+), 84 deletions(-)
create mode 100644 arch/x86/include/asm/context_tracking_work.h
create mode 100644 include/linux/context_tracking_work.h
--
2.49.0
5 months, 3 weeks
- 5
- 39
[PATCH v7 iproute2-next 0/1] DUALPI2 iproute2 patch
by chia-yu.chang＠nokia-bell-labs.com
From: Chia-Yu Chang <chia-yu.chang(a)nokia-bell-labs.com>
Hello,
Please find DUALPI2 iproute2 patch v7.
v7 (05-May-25)
- Align pkt_sched.h with the v14 version of net-next due to spec modificiaotn in tc.yaml
- Reorganize dualpi2_print_opt() to match the order in tc.yaml
- Remove credit-queue in PRINT_JSON
v6 (26-Apr-25)
- Update JSON file output due to spec modifiocation in tc.yaml of net-next
v5 (25-Mar-25)
- Use matches() to replace current strcmp() (Stephen Hemminger <stephen(a)networkplumber.org>)
- Use general parse_percent() for handling scaled percentage values (Stephen Hemminger <stephen(a)networkplumber.org>)
- Add print function for JSON of dualpi2 stats (Stephen Hemminger <stephen(a)networkplumber.org>)
v4 (16-Mar-25)
- Add min_qlen_step to dualpi2 attribute as the minimum queue length in number of packets in the L-queue to start step amrking.
v3 (21-Feb-25)
- Add memlimit to dualpi2 attribute, and add memory_used, max_memory_used, memory_limit in dualpi2 stats (Dave Taht <dave.taht(a)gmail.com>)
- Update manual to align latest implementation and clarify the queue naming and default unit
- Use common "get_scaled_alpha_beta" and clean print_opt for Dualpi2
v2 (23-Oct-24)
- Rename get_float in dualpi2 to get_float_min_max in utils.c
- Move get_float from iplink_can.c in utils.c (Stephen Hemminger <stephen(a)networkplumber.org>)
- Add print function for JSON of dualpi2 (Stephen Hemminger <stephen(a)networkplumber.org>)
For more details of DualPI2, plesae refer IETF RFC9332
(https://datatracker.ietf.org/doc/html/rfc9332).
Best Regards,
Chia-Yu
Chia-Yu Chang (1):
tc: add dualpi2 scheduler module
bash-completion/tc | 11 +-
include/uapi/linux/pkt_sched.h | 67 +++++
include/utils.h | 2 +
ip/iplink_can.c | 14 -
lib/utils.c | 30 ++
man/man8/tc-dualpi2.8 | 249 ++++++++++++++++
tc/Makefile | 1 +
tc/q_dualpi2.c | 528 +++++++++++++++++++++++++++++++++
8 files changed, 887 insertions(+), 15 deletions(-)
create mode 100644 man/man8/tc-dualpi2.8
create mode 100644 tc/q_dualpi2.c
--
2.34.1
5 months, 3 weeks
- 2
- 2
[PATCH v2 0/8] selftests: vDSO: Some cleanups and (warning) fixes
by Thomas Weißschuh
Fixes and cleanups for various issues in the vDSO selftests.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh(a)linutronix.de>
---
Changes in v2:
- Refer to -Wstrict-prototypes over -Wold-style-prototypes
- Pick up Acks
- Enable fixed warnings in Makefile
- Link to v1: https://lore.kernel.org/r/20250502-selftests-vdso-fixes-v1-0-fb5d640a4f78@l…
---
Thomas Weißschuh (8):
selftests: vDSO: chacha: Correctly skip test if necessary
selftests: vDSO: clock_getres: Drop unused include of err.h
selftests: vDSO: vdso_test_getrandom: Drop unused include of linux/compiler.h
selftests: vDSO: vdso_test_getrandom: Drop some dead code
selftests: vDSO: vdso_config: Avoid -Wunused-variables
selftests: vDSO: enable -Wall
selftests: vDSO: vdso_test_correctness: Fix -Wstrict-prototypes
selftests: vDSO: vdso_test_getrandom: Always print TAP header
tools/testing/selftests/vDSO/Makefile | 2 +-
tools/testing/selftests/vDSO/vdso_config.h | 2 ++
tools/testing/selftests/vDSO/vdso_test_chacha.c | 3 ++-
tools/testing/selftests/vDSO/vdso_test_clock_getres.c | 1 -
tools/testing/selftests/vDSO/vdso_test_correctness.c | 2 +-
tools/testing/selftests/vDSO/vdso_test_getrandom.c | 18 +++++-------------
6 files changed, 11 insertions(+), 17 deletions(-)
---
base-commit: 0af2f6be1b4281385b618cb86ad946eded089ac8
change-id: 20250423-selftests-vdso-fixes-d2ce74142359
Best regards,
--
Thomas Weißschuh <thomas.weissschuh(a)linutronix.de>
5 months, 3 weeks
- 2
- 10
[PATCH v3 00/32] kselftest harness and nolibc compatibility
by Thomas Weißschuh
Nolibc is useful for selftests as the test programs can be very small,
and compiled with just a kernel crosscompiler, without userspace support.
Currently nolibc is only usable with kselftest.h, not the more
convenient to use kselftest_harness.h
This series provides this compatibility by adding new features to nolibc
and removing the usage of problematic features from the harness.
The first half of the series are changes to the harness, the second one
are for nolibc. Both parts are very independent and should go through
different trees.
The last patch is not meant to be applied and serves as test that
everything works together correctly.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh(a)linutronix.de>
---
Changes in v3:
- Send patches to correct kselftest harness maintainers
- Move harness selftest to dedicated directory
- Add harness selftest to MAINTAINERS
- Integrate harness selftest cleanup with the selftest framework
- Consistently use "kselftest harness" in commit messages
- Properly propagate kselftest harness failure
- Link to v2: https://lore.kernel.org/r/20250407-nolibc-kselftest-harness-v2-0-f8812f76e9…
Changes in v2:
- Rebase unto v6.15-rc1
- Rename internal nolibc symbols
- Handle edge case of waitpid(INT_MIN) == ESRCH
- Fix arm configurations for final testing patch
- Clean up global getopt.h variable declarations
- Add Acks from Willy
- Link to v1: https://lore.kernel.org/r/20250304-nolibc-kselftest-harness-v1-0-adca7cd231…
---
Thomas Weißschuh (32):
selftests: harness: Add kselftest harness selftest
selftests: harness: Use C89 comment style
selftests: harness: Ignore unused variant argument warning
selftests: harness: Mark functions without prototypes static
selftests: harness: Remove inline qualifier for wrappers
selftests: harness: Remove dependency on libatomic
selftests: harness: Implement test timeouts through pidfd
selftests: harness: Don't set setup_completed for fixtureless tests
selftests: harness: Always provide "self" and "variant"
selftests: harness: Move teardown conditional into test metadata
selftests: harness: Add teardown callback to test metadata
selftests: harness: Stop using setjmp()/longjmp()
selftests: harness: Guard includes on nolibc
tools/nolibc: handle intmax_t/uintmax_t in printf
tools/nolibc: use intmax definitions from compiler
tools/nolibc: use pselect6_time64 if available
tools/nolibc: use ppoll_time64 if available
tools/nolibc: add tolower() and toupper()
tools/nolibc: add _exit()
tools/nolibc: add setpgrp()
tools/nolibc: implement waitpid() in terms of waitid()
Revert "selftests/nolibc: use waitid() over waitpid()"
tools/nolibc: add dprintf() and vdprintf()
tools/nolibc: add getopt()
tools/nolibc: allow different write callbacks in printf
tools/nolibc: allow limiting of printf destination size
tools/nolibc: add snprintf() and friends
selftests/nolibc: use snprintf() for printf tests
selftests/nolibc: rename vfprintf test suite
selftests/nolibc: add test for snprintf() truncation
tools/nolibc: implement width padding in printf()
HACK: selftests/nolibc: demonstrate usage of the kselftest harness
MAINTAINERS | 1 +
tools/include/nolibc/Makefile | 1 +
tools/include/nolibc/getopt.h | 101 ++
tools/include/nolibc/nolibc.h | 1 +
tools/include/nolibc/stdint.h | 4 +-
tools/include/nolibc/stdio.h | 127 +-
tools/include/nolibc/string.h | 17 +
tools/include/nolibc/sys.h | 105 +-
tools/testing/selftests/Makefile | 1 +
tools/testing/selftests/kselftest_harness.h | 181 +-
.../testing/selftests/kselftest_harness/.gitignore | 2 +
tools/testing/selftests/kselftest_harness/Makefile | 7 +
.../selftests/kselftest_harness/harness-selftest.c | 129 ++
.../kselftest_harness/harness-selftest.expected | 62 +
.../kselftest_harness/harness-selftest.sh | 13 +
tools/testing/selftests/nolibc/Makefile | 13 +-
tools/testing/selftests/nolibc/harness-selftest.c | 1 +
tools/testing/selftests/nolibc/nolibc-test.c | 1729 +-------------------
tools/testing/selftests/nolibc/run-tests.sh | 2 +-
19 files changed, 637 insertions(+), 1860 deletions(-)
---
base-commit: 0af2f6be1b4281385b618cb86ad946eded089ac8
change-id: 20250130-nolibc-kselftest-harness-8b2c8cac43bf
Best regards,
--
Thomas Weißschuh <thomas.weissschuh(a)linutronix.de>
5 months, 3 weeks
- 7
- 45
Re: [PATCH] char: misc: make miscdevice unit test built-in only
by Geert Uytterhoeven
Hi Thadeu,
CC kunit
On Mon, 5 May 2025 at 14:13, Thadeu Lima de Souza Cascardo
<cascardo(a)igalia.com> wrote:
> On Mon, May 05, 2025 at 09:21:15AM +0200, Geert Uytterhoeven wrote:
> > On Wed, 30 Apr 2025 at 18:53, Thadeu Lima de Souza Cascardo
> > <cascardo(a)igalia.com> wrote:
> > > Since it uses __init symbols, it cannot be a module. Builds with
> > > CONFIG_TEST_MISC_MINOR=m will fail with:
> > >
> > > ERROR: modpost: "init_mknod" [drivers/misc/misc_minor_kunit.ko] undefined!
> > > ERROR: modpost: "init_unlink" [drivers/misc/misc_minor_kunit.ko] undefined!
> > >
> > > Reported-by: Stephen Rothwell <sfr(a)canb.auug.org.au>
> > > Closes: https://lore.kernel.org/linux-next/20250429155404.2b6fe5b1@canb.auug.org.au/
> > > Reported-by: kernel test robot <lkp(a)intel.com>
> > > Closes: https://lore.kernel.org/oe-kbuild-all/202504160338.BjUL3Owb-lkp@intel.com/
> > > Fixes: 45f0de4f8dc3 ("char: misc: add test cases")
> > > Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo(a)igalia.com>
> >
> > Thanks for your patch, which is now commit 20acf4dd46e4c090 ("char:
> > misc: make miscdevice unit test built-in only") in char-misc-next.
> >
> > > --- a/lib/Kconfig.debug
> > > +++ b/lib/Kconfig.debug
> > > @@ -2512,7 +2512,7 @@ config TEST_IDA
> > > tristate "Perform selftest on IDA functions"
> > >
> > > config TEST_MISC_MINOR
> > > - tristate "miscdevice KUnit test" if !KUNIT_ALL_TESTS
> > > + bool "miscdevice KUnit test" if !KUNIT_ALL_TESTS
> > > depends on KUNIT
> > > default KUNIT_ALL_TESTS
> >
> > This means "default y" if KUNIT_ALL_TESTS=m, which is IMHO not
> > what we want.
>
> The precedent for other kunit config options that are bool is that they use
> "default KUNIT_ALL_TESTS".
Seems like you are right. Looks like none of the boolean ones can
be enabled on m68k, which is where I run most of the tests, so I never
noticed before :-(
> It makes sense that if you choose to build all tests, you would not skip
> the ones that cannot be built as a module.
You can still enable the test manually if you want.
But I think it should not be enabled by default when all other tests
that can be modular are built as modules. Unlike for modular tests,
enabling builtin tests by default does impact the base kernel.
> > Perhaps
> >
> > default KUNIT_ALL_TESTS=y
> >
> > ?
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert(a)linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
5 months, 3 weeks
- 1
- 0
[PATCH v13 net-next 0/5] DUALPI2 patch
by chia-yu.chang＠nokia-bell-labs.com
From: Chia-Yu Chang <chia-yu.chang(a)nokia-bell-labs.com>
Hello,
Please find the DualPI2 patch v13.
v13 (26-Apr-2025)
- Use dashes in member names to follow YNL conventions in tc.yaml (Donald Hunter <donald.hunter(a)gmail.com>)
- Define enumerations separately for flags of drop-early, drop-overload, ecn-mask, credit-queue in tc.yaml (Donald Hunter <donald.hunter(a)gmail.com>)
- Change the types of split-gso and step-packets into flag in tc.yaml (Donald Hunter <donald.hunter(a)gmail.com>)
- Revert to u32/u8 types for tc-dualpi2-xstats members in tc.yaml (Donald Hunter <donald.hunter(a)gmail.com>)
- Add new test cases in tc-tests/qdiscs/dualpi2.json to cover all dualpi2 paramters (Donald Hunter <donald.hunter(a)gmail.com>)
- Change the type of TCA_DUALPI2_STEP_PACKETS into NLA_FLAG (Donald Hunter <donald.hunter(a)gmail.com>)
v12 (22-Apr-2025)
- Remove anonymous struct in sch_dualpi2.c (Paolo Abeni <pabeni(a)redhat.com>)
- Replace u32/u8 with uint and s32 with int in tc spec document (Paolo Abeni <pabeni(a)redhat.com>)
- Introduce get_memory_limit function to handle potential overflow when multipling limit with MTU (Paolo Abeni <pabeni(a)redhat.com>)
- Double the packet length to further include packet overhead in memory_limit (Paolo Abeni <pabeni(a)redhat.com>)
- Remove the check of qdisc_qlen(sch) when calling qdisc_tree_reduce_backlog (Paolo Abeni <pabeni(a)redhat.com>)
v11 (15-Apr-2025)
- Replace hstimer_init with hstimer_setup in sch_dualpi2.c
v10 (25-Mar-2025)
- Remove leftover include in include/linux/netdevice.h and anonymous struct in sch_dualpi2.c (Paolo Abeni <pabeni(a)redhat.com>)
- Use kfree_skb_reason() and add SKB_DROP_REASON_DUALPI2_STEP_DROP drop reason (Paolo Abeni <pabeni(a)redhat.com>)
- Split sch_dualpi2.c into 3 patches (and overall 5 patches): Struct definition & parsing, Dump stats & configuration, Enqueue/Dequeue (Paolo Abeni <pabeni(a)redhat.com>)
v9 (16-Mar-2025)
- Fix mem_usage error in previous version
- Add min_qlen_step to the dualpi2 attribute as the minimum queue length in number of packets in the L-queue to start step threshold marking.
In previous versions, this value was fixed to 2, so the step threshold was applied to mark packets in the L queue only when the queue length of the L queue was greater than or equal to 2 packets.
This will cause larger queuing delays for L4S traffic at low rates (<20Mbps). So we parameterize it and change the default value to 0.
Comparison of tcp_1down run 'HTB 20Mbit + DUALPI2 + 10ms base delay'
Old versions:
avg median # data pts
Ping (ms) ICMP : 11.55 11.70 ms 350
TCP upload avg : 18.96 N/A Mbits/s 350
TCP upload sum : 18.96 N/A Mbits/s 350
New version (v9):
avg median # data pts
Ping (ms) ICMP : 10.81 10.70 ms 350
TCP upload avg : 18.91 N/A Mbits/s 350
TCP upload sum : 18.91 N/A Mbits/s 350
Comparison of tcp_1down run 'HTB 10Mbit + DUALPI2 + 10ms base delay'
Old versions:
avg median # data pts
Ping (ms) ICMP : 12.61 12.80 ms 350
TCP upload avg : 9.48 N/A Mbits/s 350
TCP upload sum : 9.48 N/A Mbits/s 350
New version (v9):
avg median # data pts
Ping (ms) ICMP : 11.06 10.80 ms 350
TCP upload avg : 9.43 N/A Mbits/s 350
TCP upload sum : 9.43 N/A Mbits/s 350
Comparison of tcp_1down run 'HTB 10Mbit + DUALPI2 + 10ms base delay'
Old versions:
avg median # data pts
Ping (ms) ICMP : 40.86 37.45 ms 350
TCP upload avg : 0.88 N/A Mbits/s 350
TCP upload sum : 0.88 N/A Mbits/s 350
TCP upload::1 : 0.88 0.97 Mbits/s 350
New version (v9):
avg median # data pts
Ping (ms) ICMP : 11.07 10.40 ms 350
TCP upload avg : 0.55 N/A Mbits/s 350
TCP upload sum : 0.55 N/A Mbits/s 350
TCP upload::1 : 0.55 0.59 Mbits/s 350
v8 (11-Mar-2025)
- Fix warning messages in v7
v7 (07-Mar-2025)
- Separate into 3 patches to avoid mixing changes of documentation, selftest, and code. (Cong Wang <xiyou.wangcong(a)gmail.com>)
v6 (04-Mar-2025)
- Add modprobe for dulapi2 in tc-testing script tc-testing/tdc.sh (Jakub Kicinski <kuba(a)kernel.org>)
- Update test cases in dualpi2.json
- Update commit message
v5 (22-Feb-2025)
- A comparison was done between MQ + DUALPI2, MQ + FQ_PIE, MQ + FQ_CODEL:
Unshaped 1gigE with 4 download streams test:
- Summary of tcp_4down run 'MQ + FQ_CODEL':
avg median # data pts
Ping (ms) ICMP : 1.19 1.34 ms 349
TCP download avg : 235.42 N/A Mbits/s 349
TCP download sum : 941.68 N/A Mbits/s 349
TCP download::1 : 235.19 235.39 Mbits/s 349
TCP download::2 : 235.03 235.35 Mbits/s 349
TCP download::3 : 236.89 235.44 Mbits/s 349
TCP download::4 : 234.57 235.19 Mbits/s 349
- Summary of tcp_4down run 'MQ + FQ_PIE'
avg median # data pts
Ping (ms) ICMP : 1.21 1.37 ms 350
TCP download avg : 235.42 N/A Mbits/s 350
TCP download sum : 941.61 N/A Mbits/s 350
TCP download::1 : 232.54 233.13 Mbits/s 350
TCP download::2 : 232.52 232.80 Mbits/s 350
TCP download::3 : 233.14 233.78 Mbits/s 350
TCP download::4 : 243.41 241.48 Mbits/s 350
- Summary of tcp_4down run 'MQ + DUALPI2'
avg median # data pts
Ping (ms) ICMP : 1.19 1.34 ms 349
TCP download avg : 235.42 N/A Mbits/s 349
TCP download sum : 941.68 N/A Mbits/s 349
TCP download::1 : 235.19 235.39 Mbits/s 349
TCP download::2 : 235.03 235.35 Mbits/s 349
TCP download::3 : 236.89 235.44 Mbits/s 349
TCP download::4 : 234.57 235.19 Mbits/s 349
Unshaped 1gigE with 128 download streams test:
- Summary of tcp_128down run 'MQ + FQ_CODEL':
avg median # data pts
Ping (ms) ICMP : 1.88 1.86 ms 350
TCP download avg : 7.39 N/A Mbits/s 350
TCP download sum : 946.47 N/A Mbits/s 350
- Summary of tcp_128down run 'MQ + FQ_PIE':
avg median # data pts
Ping (ms) ICMP : 1.88 1.86 ms 350
TCP download avg : 7.39 N/A Mbits/s 350
TCP download sum : 946.47 N/A Mbits/s 350
- Summary of tcp_128down run 'MQ + DUALPI2':
avg median # data pts
Ping (ms) ICMP : 1.88 1.86 ms 350
TCP download avg : 7.39 N/A Mbits/s 350
TCP download sum : 946.47 N/A Mbits/s 350
Unshaped 10gigE with 4 download streams test:
- Summary of tcp_4down run 'MQ + FQ_CODEL':
avg median # data pts
Ping (ms) ICMP : 0.22 0.23 ms 350
TCP download avg : 2354.08 N/A Mbits/s 350
TCP download sum : 9416.31 N/A Mbits/s 350
TCP download::1 : 2353.65 2352.81 Mbits/s 350
TCP download::2 : 2354.54 2354.21 Mbits/s 350
TCP download::3 : 2353.56 2353.78 Mbits/s 350
TCP download::4 : 2354.56 2354.45 Mbits/s 350
- Summary of tcp_4down run 'MQ + FQ_PIE':
avg median # data pts
Ping (ms) ICMP : 0.20 0.19 ms 350
TCP download avg : 2354.76 N/A Mbits/s 350
TCP download sum : 9419.04 N/A Mbits/s 350
TCP download::1 : 2354.77 2353.89 Mbits/s 350
TCP download::2 : 2353.41 2354.29 Mbits/s 350
TCP download::3 : 2356.18 2354.19 Mbits/s 350
TCP download::4 : 2354.68 2353.15 Mbits/s 350
- Summary of tcp_4down run 'MQ + DUALPI2':
avg median # data pts
Ping (ms) ICMP : 0.24 0.24 ms 350
TCP download avg : 2354.11 N/A Mbits/s 350
TCP download sum : 9416.43 N/A Mbits/s 350
TCP download::1 : 2354.75 2353.93 Mbits/s 350
TCP download::2 : 2353.15 2353.75 Mbits/s 350
TCP download::3 : 2353.49 2353.72 Mbits/s 350
TCP download::4 : 2355.04 2353.73 Mbits/s 350
Unshaped 10gigE with 128 download streams test:
- Summary of tcp_128down run 'MQ + FQ_CODEL':
avg median # data pts
Ping (ms) ICMP : 7.57 8.69 ms 350
TCP download avg : 73.97 N/A Mbits/s 350
TCP download sum : 9467.82 N/A Mbits/s 350
- Summary of tcp_128down run 'MQ + FQ_PIE':
avg median # data pts
Ping (ms) ICMP : 7.82 8.91 ms 350
TCP download avg : 73.97 N/A Mbits/s 350
TCP download sum : 9468.42 N/A Mbits/s 350
- Summary of tcp_128down run 'MQ + DUALPI2':
avg median # data pts
Ping (ms) ICMP : 6.87 7.93 ms 350
TCP download avg : 73.95 N/A Mbits/s 350
TCP download sum : 9465.87 N/A Mbits/s 350
From the results shown above, we see small differences between combinations.
- Update commit message to include results of no_split_gso and split_gso (Dave Taht <dave.taht(a)gmail.com> and Paolo Abeni <pabeni(a)redhat.com>)
- Add memlimit in the dualpi2 attribute, and add memory_used, max_memory_used, memory_limit in dualpi2 stats (Dave Taht <dave.taht(a)gmail.com>)
- Update note in sch_dualpi2.c related to BBRv3 status (Dave Taht <dave.taht(a)gmail.com>)
- Update license identifier (Dave Taht <dave.taht(a)gmail.com>)
- Add selftest in tools/testing/selftests/tc-testing (Cong Wang <xiyou.wangcong(a)gmail.com>)
- Use netlink policies for parameter checks (Jamal Hadi Salim <jhs(a)mojatatu.com>)
- Modify texts & fix typos in Documentation/netlink/specs/tc.yaml (Dave Taht <dave.taht(a)gmail.com>)
- Add descriptions of packet counter statistics and the reset function of sch_dualpi2.c
- Fix step_thresh in packets
- Update code comments in sch_dualpi2.c
v4 (22-Oct-2024)
- Update statement in Kconfig for DualPI2 (Stephen Hemminger <stephen(a)networkplumber.org>)
- Put a blank line after #define in sch_dualpi2.c (Stephen Hemminger <stephen(a)networkplumber.org>)
- Fix line length warning.
v3 (19-Oct-2024)
- Fix compilaiton error
- Update Documentation/netlink/specs/tc.yaml (Jakub Kicinski <kuba(a)kernel.org>)
v2 (18-Oct-2024)
- Add Documentation/netlink/specs/tc.yaml (Jakub Kicinski <kuba(a)kernel.org>)
- Use dualpi2 instead of skb prefix (Jamal Hadi Salim <jhs(a)mojatatu.com>)
- Replace nla_parse_nested_deprecated with nla_parse_nested (Jamal Hadi Salim <jhs(a)mojatatu.com>)
- Fix line length warning
For more details of DualPI2, please refer IETF RFC9332 (https://datatracker.ietf.org/doc/html/rfc9332).
Best regards,
Chia-Yu
Chia-Yu Chang (4):
Documentation: netlink: specs: tc: Add DualPI2 specification
selftests/tc-testing: Add selftests for qdisc DualPI2
sched: Struct definition and parsing of dualpi2 qdisc
sched: Dump configuration and statistics of dualpi2 qdisc
Koen De Schepper (1):
sched: Add enqueue/dequeue of dualpi2 qdisc
Documentation/netlink/specs/tc.yaml | 166 +++
include/net/dropreason-core.h | 6 +
include/uapi/linux/pkt_sched.h | 39 +
net/sched/Kconfig | 12 +
net/sched/Makefile | 1 +
net/sched/sch_dualpi2.c | 1089 +++++++++++++++++
tools/testing/selftests/tc-testing/config | 1 +
.../tc-testing/tc-tests/qdiscs/dualpi2.json | 254 ++++
tools/testing/selftests/tc-testing/tdc.sh | 1 +
9 files changed, 1569 insertions(+)
create mode 100644 net/sched/sch_dualpi2.c
create mode 100644 tools/testing/selftests/tc-testing/tc-tests/qdiscs/dualpi2.json
--
2.34.1
5 months, 3 weeks
- 3
- 9
[PATCH bpf-next v1 0/2] ktls, sockmap: Fix missing uncharge operation and add selfttest
by Jiayuan Chen
Cong reported a warning when running ./test_sockmp:
https://lore.kernel.org/bpf/aAmIi0vlycHtbXeb@pop-os.localdomain/T/#t
------------[ cut here ]------------
WARNING: CPU: 1 PID: 40 at net/ipv4/af_inet.c inet_sock_destruct+0x173/0x1d5
Tainted: [W]=WARN
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.15.0-1 04/01/2014
Workqueue: events sk_psock_destroy
RIP: 0010:inet_sock_destruct+0x173/0x1d5
RSP: 0018:ffff8880085cfc18 EFLAGS: 00010202
RAX: 1ffff11003dbfc00 RBX: ffff88801edfe3e8 RCX: ffffffff822f5af4
RDX: 0000000000000007 RSI: dffffc0000000000 RDI: ffff88801edfe16c
RBP: ffff88801edfe184 R08: ffffed1003dbfc31 R09: 0000000000000000
R10: ffffffff822f5ab7 R11: ffff88801edfe187 R12: ffff88801edfdec0
R13: ffff888020376ac0 R14: ffff888020376ac0 R15: ffff888020376a60
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000556365155830 CR3: 000000001d6aa000 CR4: 0000000000350ef0
Call Trace:
<TASK>
__sk_destruct+0x46/0x222
sk_psock_destroy+0x22f/0x242
process_one_work+0x504/0x8a8
? process_one_work+0x39d/0x8a8
? __pfx_process_one_work+0x10/0x10
? worker_thread+0x44/0x2ae
? __list_add_valid_or_report+0x83/0xea
? srso_return_thunk+0x5/0x5f
? __list_add+0x45/0x52
process_scheduled_works+0x73/0x82
worker_thread+0x1ce/0x2ae
When we specify apply_bytes, we divide the msg into multiple segments,
each with a length of 'send', and every time we send this part of the data
using tcp_bpf_sendmsg_redir(), we use sk_msg_return_zero() to uncharge the
memory of the specified 'send' size.
However, if the first segment of data fails to send, for example, the
peer's buffer is full, we need to release all of the msg. When releasing
the msg, we haven't uncharged the memory of the subsequent segments.
This modification does not make significant logical changes, but only
fills in the missing uncharge places.
This issue has existed all along, until it was exposed after we added the
apply test in test_sockmap:
commit 3448ad23b34e ("selftests/bpf: Add apply_bytes test to test_txmsg_redir_wait_sndmem in test_sockmap")
Jiayuan Chen (2):
ktls, sockmap: Fix missing uncharge operation
selftests/bpf: Add test to cover sockmap with ktls
net/tls/tls_sw.c | 7 ++
.../selftests/bpf/prog_tests/sockmap_ktls.c | 76 +++++++++++++++++++
.../selftests/bpf/progs/test_sockmap_ktls.c | 10 +++
3 files changed, 93 insertions(+)
--
2.47.1
5 months, 3 weeks
- 3
- 6
[PATCH] selftests/filesystems: Fix typo in file_stressor.c
by Chelsy Ratnawat
Change spelling from rougly to roughly.
Signed-off-by: Chelsy Ratnawat <chelsyratnawat2001(a)gmail.com>
---
tools/testing/selftests/filesystems/file_stressor.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/testing/selftests/filesystems/file_stressor.c b/tools/testing/selftests/filesystems/file_stressor.c
index 1136f93a9977..01dd89f8e52f 100644
--- a/tools/testing/selftests/filesystems/file_stressor.c
+++ b/tools/testing/selftests/filesystems/file_stressor.c
@@ -156,7 +156,7 @@ TEST_F_TIMEOUT(file_stressor, slab_typesafe_by_rcu, 900 * 2)
ssize_t nr_read;
/*
- * Concurrently read /proc/<pid>/fd/ which rougly does:
+ * Concurrently read /proc/<pid>/fd/ which roughly does:
*
* f = fget_task_next(p, &fd);
* if (!f)
--
2.43.5
5 months, 3 weeks
- 1
- 1
[PATCH net-next v2] selftests: net: exit cleanly on SIGTERM / timeout
by Jakub Kicinski
ksft runner sends 2 SIGTERMs in a row if a test runs out of time.
Handle this in a similar way we handle SIGINT - cleanup and stop
running further tests.
Because we get 2 signals we need a bit of logic to ignore
the subsequent one, they come immediately one after the other
(due to commit 9616cb34b08e ("kselftest/runner.sh: Propagate SIGTERM
to runner child")).
This change makes sure we run cleanup (scheduled defer()s)
and also print a stack trace on SIGTERM, which doesn't happen
by default. Tests occasionally hang in NIPA and it's impossible
to tell what they are waiting from or doing.
Signed-off-by: Jakub Kicinski <kuba(a)kernel.org>
---
v2:
- remove declaration at the global scope
v1: https://lore.kernel.org/20250425151757.1652517-1-kuba@kernel.org
CC: petrm(a)nvidia.com
CC: willemb(a)google.com
CC: sdf(a)fomichev.me
CC: linux-kselftest(a)vger.kernel.org
---
tools/testing/selftests/net/lib/py/ksft.py | 25 +++++++++++++++++++++-
1 file changed, 24 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/net/lib/py/ksft.py b/tools/testing/selftests/net/lib/py/ksft.py
index 3cfad0fd4570..1b815768bf8a 100644
--- a/tools/testing/selftests/net/lib/py/ksft.py
+++ b/tools/testing/selftests/net/lib/py/ksft.py
@@ -3,6 +3,7 @@
import builtins
import functools
import inspect
+import signal
import sys
import time
import traceback
@@ -26,6 +27,10 @@ KSFT_DISRUPTIVE = True
pass
+class KsftTerminate(KeyboardInterrupt):
+ pass
+
+
def ksft_pr(*objs, **kwargs):
print("#", *objs, **kwargs)
@@ -193,6 +198,17 @@ KSFT_DISRUPTIVE = True
return env
+def _ksft_intr(signum, frame):
+ # ksft runner.sh sends 2 SIGTERMs in a row on a timeout
+ # if we don't ignore the second one it will stop us from handling cleanup
+ global term_cnt
+ term_cnt += 1
+ if term_cnt == 1:
+ raise KsftTerminate()
+ else:
+ ksft_pr(f"Ignoring SIGTERM (cnt: {term_cnt}), already exiting...")
+
+
def ksft_run(cases=None, globs=None, case_pfx=None, args=()):
cases = cases or []
@@ -205,6 +221,10 @@ KSFT_DISRUPTIVE = True
cases.append(value)
break
+ global term_cnt
+ term_cnt = 0
+ prev_sigterm = signal.signal(signal.SIGTERM, _ksft_intr)
+
totals = {"pass": 0, "fail": 0, "skip": 0, "xfail": 0}
print("TAP version 13")
@@ -229,11 +249,12 @@ KSFT_DISRUPTIVE = True
cnt_key = 'xfail'
except BaseException as e:
stop |= isinstance(e, KeyboardInterrupt)
+ stop |= isinstance(e, KsftTerminate)
tb = traceback.format_exc()
for line in tb.strip().split('\n'):
ksft_pr("Exception|", line)
if stop:
- ksft_pr("Stopping tests due to KeyboardInterrupt.")
+ ksft_pr(f"Stopping tests due to {type(e).__name__}.")
KSFT_RESULT = False
cnt_key = 'fail'
@@ -248,6 +269,8 @@ KSFT_DISRUPTIVE = True
if stop:
break
+ signal.signal(signal.SIGTERM, prev_sigterm)
+
print(
f"# Totals: pass:{totals['pass']} fail:{totals['fail']} xfail:{totals['xfail']} xpass:0 skip:{totals['skip']} error:0"
)
--
2.49.0
5 months, 3 weeks
- 4
- 4
[PATCH RFC 0/4] stackleak: Support Clang stack depth tracking
by Kees Cook
Hi,
As part of looking at what GCC plugins could be replaced with Clang
implementations, this series uses the recently proposed stack depth
tracking callback in Clang[1] to implement the stackleak feature.
-Kees
[1] https://github.com/llvm/llvm-project/pull/138323
Kees Cook (4):
stackleak: Rename CONFIG_GCC_PLUGIN_STACKLEAK to CONFIG_STACKLEAK
stackleak: Rename stackleak_track_stack to __sanitizer_cov_stack_depth
stackleak: Split STACKLEAK_CFLAGS from GCC_PLUGINS_CFLAGS
stackleak: Support Clang stack depth tracking
Documentation/admin-guide/sysctl/kernel.rst | 2 +-
Documentation/security/self-protection.rst | 2 +-
arch/arm/boot/compressed/Makefile | 2 +-
arch/arm/kernel/entry-common.S | 2 +-
arch/arm/vdso/Makefile | 2 +-
arch/arm64/kernel/entry.S | 2 +-
arch/arm64/kernel/pi/Makefile | 2 +-
arch/arm64/kernel/vdso/Makefile | 1 +
arch/arm64/kvm/hyp/nvhe/Makefile | 2 +-
arch/riscv/kernel/entry.S | 2 +-
arch/riscv/kernel/pi/Makefile | 2 +-
arch/riscv/purgatory/Makefile | 2 +-
arch/s390/kernel/entry.S | 2 +-
arch/sparc/vdso/Makefile | 3 +-
arch/x86/entry/calling.h | 4 +-
arch/x86/entry/vdso/Makefile | 3 +-
arch/x86/include/asm/init.h | 2 +-
arch/x86/purgatory/Makefile | 2 +-
drivers/firmware/efi/libstub/Makefile | 6 +--
drivers/misc/lkdtm/stackleak.c | 8 ++--
include/linux/init.h | 4 +-
include/linux/sched.h | 4 +-
include/linux/stackleak.h | 6 +--
kernel/Makefile | 4 +-
kernel/stackleak.c | 4 +-
lib/Makefile | 2 +-
scripts/Makefile.gcc-plugins | 13 +++---
scripts/Makefile.ubsan | 12 +++++
scripts/gcc-plugins/stackleak_plugin.c | 52 ++++++++++-----------
security/Kconfig.hardening | 25 ++++++----
tools/objtool/check.c | 2 +-
tools/testing/selftests/lkdtm/config | 2 +-
32 files changed, 105 insertions(+), 78 deletions(-)
--
2.34.1
5 months, 3 weeks
- 1
- 4
[PATCH v8 0/2] memcg: Fix test_memcg_min/low test failures
by Waiman Long
v8:
- Ignore the low event count of child 2 with memory_recursiveprot on
in patch 1 as originally suggested by Michal.
v7:
- Skip the vmscan change as the mem_cgroup_usage() check for now as
it is currently redundant.
v6:
- The memcg_test_low failure is indeed due to the memory_recursiveprot
mount option which is enabled by default in systemd cgroup v2 setting.
So adopt Michal's suggestion to adjust the low event checking
according to whether memory_recursiveprot is enabled or not.
The test_memcontrol selftest consistently fails its test_memcg_low
sub-test (with memory_recursiveprot enabled) and sporadically fails
its test_memcg_min sub-test. This patchset fixes the test_memcg_min
and test_memcg_low failures by adjusting the test_memcontrol selftest
to fix these test failures.
Waiman Long (2):
selftests: memcg: Allow low event with no memory.low and
memory_recursiveprot on
selftests: memcg: Increase error tolerance of child memory.current
check in test_memcg_protection()
.../selftests/cgroup/test_memcontrol.c | 22 ++++++++++++++-----
1 file changed, 16 insertions(+), 6 deletions(-)
--
2.49.0
5 months, 3 weeks
- 3
- 4
[PATCH net v1] selftests: iou-zcrx: Clean up build warnings for error format
by Haiyue Wang
Clean up two build warnings:
[1]:
iou-zcrx.c: In function ‘process_recvzc’:
iou-zcrx.c:263:37: warning: too many arguments for
format [-Wformat-extra-args]
263 | error(1, 0, "payload mismatch at ", i);
| ^~~~~~~~~~~~~~~~~~~~~~
[2]:
iou-zcrx.c: In function ‘run_client’:
iou-zcrx.c:357:47: warning: format ‘%d’ expects argument of
type ‘int’, but argument 4 has
type ‘ssize_t’ {aka ‘long int’} [-Wformat=]
357 | error(1, 0, "send(): %d", sent);
| ~^ ~~~~
| | |
| int ssize_t {aka long int}
| %ld
Signed-off-by: Haiyue Wang <haiyuewa(a)163.com>
---
tools/testing/selftests/drivers/net/hw/iou-zcrx.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/drivers/net/hw/iou-zcrx.c b/tools/testing/selftests/drivers/net/hw/iou-zcrx.c
index c26b4180eddd..19e1ff45deb4 100644
--- a/tools/testing/selftests/drivers/net/hw/iou-zcrx.c
+++ b/tools/testing/selftests/drivers/net/hw/iou-zcrx.c
@@ -260,7 +260,7 @@ static void process_recvzc(struct io_uring *ring, struct io_uring_cqe *cqe)
for (i = 0; i < n; i++) {
if (*(data + i) != payload[(received + i)])
- error(1, 0, "payload mismatch at ", i);
+ error(1, 0, "payload mismatch at %d", i);
}
received += n;
@@ -354,7 +354,7 @@ static void run_client(void)
chunk = min_t(ssize_t, cfg_payload_len, to_send);
res = send(fd, src, chunk, 0);
if (res < 0)
- error(1, 0, "send(): %d", sent);
+ error(1, 0, "send(): %ld", sent);
sent += res;
to_send -= res;
}
--
2.49.0
5 months, 3 weeks
- 2
- 1
[PATCH 0/7] selftests: vDSO: Some cleanups and fixes
by Thomas Weißschuh
Fixes and cleanups for various issues in the vDSO selftests.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh(a)linutronix.de>
---
Thomas Weißschuh (7):
selftests: vDSO: chacha: Correctly skip test if necessary
selftests: vDSO: clock_getres: Drop unused include of err.h
selftests: vDSO: vdso_test_correctness: Fix -Wold-style-definitions
selftests: vDSO: vdso_test_getrandom: Drop unused include of linux/compiler.h
selftests: vDSO: vdso_test_getrandom: Drop some dead code
selftests: vDSO: vdso_test_getrandom: Always print TAP header
selftests: vDSO: vdso_config: Avoid -Wunused-variables
tools/testing/selftests/vDSO/vdso_config.h | 2 ++
tools/testing/selftests/vDSO/vdso_test_chacha.c | 3 ++-
tools/testing/selftests/vDSO/vdso_test_clock_getres.c | 1 -
tools/testing/selftests/vDSO/vdso_test_correctness.c | 2 +-
tools/testing/selftests/vDSO/vdso_test_getrandom.c | 18 +++++-------------
5 files changed, 10 insertions(+), 16 deletions(-)
---
base-commit: 0af2f6be1b4281385b618cb86ad946eded089ac8
change-id: 20250423-selftests-vdso-fixes-d2ce74142359
Best regards,
--
Thomas Weißschuh <thomas.weissschuh(a)linutronix.de>
5 months, 3 weeks
- 2
- 13
[PATCH bpf-next 0/2] Allow mmap of /sys/kernel/btf/vmlinux
by Lorenz Bauer
I'd like to cut down the memory usage of parsing vmlinux BTF in ebpf-go.
With some upcoming changes the library is sitting at 5MiB for a parse.
Most of that memory is simply copying the BTF blob into user space.
By allowing vmlinux BTF to be mmapped read-only into user space I can
cut memory usage by about 75%.
Signed-off-by: Lorenz Bauer <lmb(a)isovalent.com>
---
Lorenz Bauer (2):
btf: allow mmap of vmlinux btf
selftests: bpf: add a test for mmapable vmlinux BTF
include/asm-generic/vmlinux.lds.h | 3 +-
kernel/bpf/sysfs_btf.c | 25 ++++++-
tools/testing/selftests/bpf/prog_tests/btf_sysfs.c | 79 ++++++++++++++++++++++
3 files changed, 104 insertions(+), 3 deletions(-)
---
base-commit: 38d976c32d85ef12dcd2b8a231196f7049548477
change-id: 20250501-vmlinux-mmap-2ec5563c3ef1
Best regards,
--
Lorenz Bauer <lmb(a)isovalent.com>
5 months, 3 weeks
- 3
- 5
[PATCH net-next v2] selftests: drv-net: rss_input_xfrm: Check test prerequisites before running
by Gal Pressman
Ensure the following prerequisites before executing the test:
1. 'socat' is installed on the remote host.
2. Python version supports socket.SO_INCOMING_CPU (available since v3.11).
Skip the test if either prerequisite is not met.
Reviewed-by: Nimrod Oren <noren(a)nvidia.com>
Signed-off-by: Gal Pressman <gal(a)nvidia.com>
---
Changelog -
v1->v2: https://lore.kernel.org/netdev/20250317123149.364565-1-gal@nvidia.com/
* Use require_cmd() helper (Jakub).
---
tools/testing/selftests/drivers/net/hw/rss_input_xfrm.py | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/tools/testing/selftests/drivers/net/hw/rss_input_xfrm.py b/tools/testing/selftests/drivers/net/hw/rss_input_xfrm.py
index 53bb08cc29ec..f439c434ba36 100755
--- a/tools/testing/selftests/drivers/net/hw/rss_input_xfrm.py
+++ b/tools/testing/selftests/drivers/net/hw/rss_input_xfrm.py
@@ -32,6 +32,11 @@ def test_rss_input_xfrm(cfg, ipver):
if multiprocessing.cpu_count() < 2:
raise KsftSkipEx("Need at least two CPUs to test symmetric RSS hash")
+ cfg.require_cmd("socat", remote=True)
+
+ if not hasattr(socket, "SO_INCOMING_CPU"):
+ raise KsftSkipEx("socket.SO_INCOMING_CPU was added in Python 3.11")
+
input_xfrm = cfg.ethnl.rss_get(
{'header': {'dev-name': cfg.ifname}}).get('input_xfrm')
--
2.40.1
5 months, 3 weeks
- 2
- 1
[PATCH v5 0/4] mm: introduce THP deferred setting
by Nico Pache
This series is a follow-up to [1], which adds mTHP support to khugepaged.
mTHP khugepaged support is a "loose" dependency for the sysfs/sysctl
configs to make sense. Without it global="defer" and mTHP="inherit" case
is "undefined" behavior.
We've seen cases were customers switching from RHEL7 to RHEL8 see a
significant increase in the memory footprint for the same workloads.
Through our investigations we found that a large contributing factor to
the increase in RSS was an increase in THP usage.
For workloads like MySQL, or when using allocators like jemalloc, it is
often recommended to set /transparent_hugepages/enabled=never. This is
in part due to performance degradations and increased memory waste.
This series introduces enabled=defer, this setting acts as a middle
ground between always and madvise. If the mapping is MADV_HUGEPAGE, the
page fault handler will act normally, making a hugepage if possible. If
the allocation is not MADV_HUGEPAGE, then the page fault handler will
default to the base size allocation. The caveat is that khugepaged can
still operate on pages that are not MADV_HUGEPAGE.
This allows for three things... one, applications specifically designed to
use hugepages will get them, and two, applications that don't use
hugepages can still benefit from them without aggressively inserting
THPs at every possible chance. This curbs the memory waste, and defers
the use of hugepages to khugepaged. Khugepaged can then scan the memory
for eligible collapsing. Lastly there is the added benefit for those who
want THPs but experience higher latency PFs. Now you can get base page
performance at the PF handler and Hugepage performance for those mappings
after they collapse.
Admins may want to lower max_ptes_none, if not, khugepaged may
aggressively collapse single allocations into hugepages.
TESTING:
- Built for x86_64, aarch64, ppc64le, and s390x
- selftests mm
- In [1] I provided a script [2] that has multiple access patterns
- lots of general use.
- redis testing. This test was my original case for the defer mode. What I
was able to prove was that THP=always leads to increased max_latency
cases; hence why it is recommended to disable THPs for redis servers.
However with 'defer' we dont have the max_latency spikes and can still
get the system to utilize THPs. I further tested this with the mTHP
defer setting and found that redis (and probably other jmalloc users)
can utilize THPs via defer (+mTHP defer) without a large latency
penalty and some potential gains. I uploaded some mmtest results
here[3] which compares:
stock+thp=never
stock+(m)thp=always
khugepaged-mthp + defer (max_ptes_none=64)
The results show that (m)THPs can cause some throughput regression in
some cases, but also has gains in other cases. The mTHP+defer results
have more gains and less losses over the (m)THP=always case.
V5 Changes:
- rebased dependent series
- added reviewed-by tag on 2/4
V4 Changes:
- Minor Documentation fixes
- rebased the dependent series [1] onto mm-unstable
commit 0e68b850b1d3 ("vmalloc: use atomic_long_add_return_relaxed()")
V3 Changes:
- Combined the documentation commits into one, and moved a section to the
khugepaged mthp patchset
V2 Changes:
- base changes on mTHP khugepaged support
- Fix selftests parsing issue
- add mTHP defer option
- add mTHP defer Documentation
[1] - https://lore.kernel.org/lkml/20250428181218.85925-1-npache@redhat.com/
[2] - https://gitlab.com/npache/khugepaged_mthp_test
[3] - https://people.redhat.com/npache/mthp_khugepaged_defer/testoutput2/output.h…
Nico Pache (4):
mm: defer THP insertion to khugepaged
mm: document (m)THP defer usage
khugepaged: add defer option to mTHP options
selftests: mm: add defer to thp setting parser
Documentation/admin-guide/mm/transhuge.rst | 31 +++++++---
include/linux/huge_mm.h | 18 +++++-
mm/huge_memory.c | 69 +++++++++++++++++++---
mm/khugepaged.c | 8 +--
tools/testing/selftests/mm/thp_settings.c | 1 +
tools/testing/selftests/mm/thp_settings.h | 1 +
6 files changed, 106 insertions(+), 22 deletions(-)
--
2.48.1
5 months, 3 weeks
- 2
- 11
[PATCH bpf-next v3 0/2] bpf: Allow XDP_REDIRECT for XDP dev-bound programs
by Lorenzo Bianconi
In the current implementation if the program is dev-bound to a specific
device, it will not be possible to perform XDP_REDIRECT into a DEVMAP or
CPUMAP even if the program is running in the driver NAPI context.
Fix the issue introducing __bpf_prog_map_compatible utility routine in
order to avoid bpf_prog_is_dev_bound() during the XDP program load.
Continue forbidding to attach a dev-bound program to XDP maps.
---
Changes in v3:
- move seltest changes in a dedicated patch
- Link to v2: https://lore.kernel.org/r/20250423-xdp-prog-bound-fix-v2-1-51742a5dfbce@ker…
Changes in v2:
- Introduce __bpf_prog_map_compatible() utility routine in order to skip
bpf_prog_is_dev_bound check in bpf_check_tail_call()
- Extend xdp_metadata selftest
- Link to v1: https://lore.kernel.org/r/20250422-xdp-prog-bound-fix-v1-1-0b581fa186fe@ker…
---
Lorenzo Bianconi (2):
bpf: Allow XDP dev-bound programs to perform XDP_REDIRECT into maps
selftests/bpf: xdp_metadata: check XDP_REDIRCT support for dev-bound progs
kernel/bpf/core.c | 27 +++++++++++++---------
.../selftests/bpf/prog_tests/xdp_metadata.c | 22 +++++++++++++++++-
tools/testing/selftests/bpf/progs/xdp_metadata.c | 13 +++++++++++
3 files changed, 50 insertions(+), 12 deletions(-)
---
base-commit: 91dbac4076537b464639953c055c460d2bdfc7ea
change-id: 20250422-xdp-prog-bound-fix-9f30f3e134aa
Best regards,
--
Lorenzo Bianconi <lorenzo(a)kernel.org>
5 months, 3 weeks
- 2
- 3
[PATCH 0/5] riscv: misaligned: fix interruptible context and add tests
by Clément Léger
This series fixes misaligned access handling when in non interruptible
context by reenabling interrupts when possible. A previous commit
changed raw_copy_from_user() with copy_from_user() which enables page
faulting and thus can sleep. While correct, a warning is now triggered
due to being called in an invalid context (sleeping in
non-interruptible). This series fixes that problem by factorizing
misaligned load/store entry in a single function than reenables
interrupt if the interrupted context had interrupts enabled.
In order for misaligned handling problems to be caught sooner, add a
kselftest for all the currently supported instructions .
Note: these commits were actually part of another larger series for
misaligned request delegation but was split since it isn't directly
required.
Clément Léger (5):
riscv: misaligned: factorize trap handling
riscv: misaligned: enable IRQs while handling misaligned accesses
riscv: misaligned: use get_user() instead of __get_user()
Documentation/sysctl: add riscv to unaligned-trap supported archs
selftests: riscv: add misaligned access testing
Documentation/admin-guide/sysctl/kernel.rst | 4 +-
arch/riscv/kernel/traps.c | 57 ++--
arch/riscv/kernel/traps_misaligned.c | 2 +-
.../selftests/riscv/misaligned/.gitignore | 1 +
.../selftests/riscv/misaligned/Makefile | 12 +
.../selftests/riscv/misaligned/common.S | 33 +++
.../testing/selftests/riscv/misaligned/fpu.S | 180 +++++++++++++
tools/testing/selftests/riscv/misaligned/gp.S | 103 +++++++
.../selftests/riscv/misaligned/misaligned.c | 254 ++++++++++++++++++
9 files changed, 614 insertions(+), 32 deletions(-)
create mode 100644 tools/testing/selftests/riscv/misaligned/.gitignore
create mode 100644 tools/testing/selftests/riscv/misaligned/Makefile
create mode 100644 tools/testing/selftests/riscv/misaligned/common.S
create mode 100644 tools/testing/selftests/riscv/misaligned/fpu.S
create mode 100644 tools/testing/selftests/riscv/misaligned/gp.S
create mode 100644 tools/testing/selftests/riscv/misaligned/misaligned.c
--
2.49.0
5 months, 3 weeks
- 4
- 14
[RFC net-next v1 1/2] udp: Introduce UDP_STOP_RCV option for UDP
by Jiayuan Chen
For some services we are using "established-over-unconnected" model.
'''
// create unconnected socket and 'listen()'
srv_fd = socket(AF_INET, SOCK_DGRAM)
setsockopt(srv_fd, SO_REUSEPORT)
bind(srv_fd, SERVER_ADDR, SERVER_PORT)
// 'accept()'
data, client_addr = recvmsg(srv_fd)
// create a connected socket for this request
cli_fd = socket(AF_INET, SOCK_DGRAM)
setsockopt(cli_fd, SO_REUSEPORT)
bind(cli_fd, SERVER_ADDR, SERVER_PORT)
connect(cli, client_addr)
...
// do handshake with cli_fd
'''
This programming pattern simulates accept() using UDP, creating a new
socket for each client request. The server can then use separate sockets
to handle client requests, avoiding the need to use a single UDP socket
for I/O transmission.
But there is a race condition between the bind() and connect() of the
connected socket:
We might receive unexpected packets belonging to the unconnected socket
before connect() is executed, which is not what we need.
(Of course, before connect(), the unconnected socket will also receive
packets from the connected socket, which is easily resolved because
upper-layer protocols typically require explicit boundaries, and we
receive a complete packet before creating a connected socket.)
Before this patch, the connected socket had to filter requests at recvmsg
time, acting as a dispatcher to some extent. With this patch, we can
consider the bind and connect operations to be atomic.
Signed-off-by: Jiayuan Chen <jiayuan.chen(a)linux.dev>
---
include/linux/udp.h | 1 +
include/uapi/linux/udp.h | 1 +
net/ipv4/udp.c | 13 ++++++++++---
net/ipv6/udp.c | 5 +++--
4 files changed, 15 insertions(+), 5 deletions(-)
diff --git a/include/linux/udp.h b/include/linux/udp.h
index 895240177f4f..8d281a0c0d9d 100644
--- a/include/linux/udp.h
+++ b/include/linux/udp.h
@@ -42,6 +42,7 @@ enum {
UDP_FLAGS_ENCAP_ENABLED, /* This socket enabled encap */
UDP_FLAGS_UDPLITE_SEND_CC, /* set via udplite setsockopt */
UDP_FLAGS_UDPLITE_RECV_CC, /* set via udplite setsockopt */
+ UDP_FLAGS_STOP_RCV, /* Stop receiving packets */
};
struct udp_sock {
diff --git a/include/uapi/linux/udp.h b/include/uapi/linux/udp.h
index edca3e430305..bb8e0a749a55 100644
--- a/include/uapi/linux/udp.h
+++ b/include/uapi/linux/udp.h
@@ -34,6 +34,7 @@ struct udphdr {
#define UDP_NO_CHECK6_RX 102 /* Disable accepting checksum for UDP6 */
#define UDP_SEGMENT 103 /* Set GSO segmentation size */
#define UDP_GRO 104 /* This socket can receive UDP GRO packets */
+#define UDP_STOP_RCV 105 /* This socket will not receive any packets */
/* UDP encapsulation types */
#define UDP_ENCAP_ESPINUDP_NON_IKE 1 /* unused draft-ietf-ipsec-nat-t-ike-00/01 */
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index f9f5b92cf4b6..764d337ab1b3 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -376,7 +376,8 @@ static int compute_score(struct sock *sk, const struct net *net,
if (!net_eq(sock_net(sk), net) ||
udp_sk(sk)->udp_port_hash != hnum ||
- ipv6_only_sock(sk))
+ ipv6_only_sock(sk) ||
+ udp_test_bit(STOP_RCV, sk))
return -1;
if (sk->sk_rcv_saddr != daddr)
@@ -494,7 +495,7 @@ static struct sock *udp4_lib_lookup2(const struct net *net,
result = inet_lookup_reuseport(net, sk, skb, sizeof(struct udphdr),
saddr, sport, daddr, hnum, udp_ehashfn);
- if (!result) {
+ if (!result || udp_test_bit(STOP_RCV, result)) {
result = sk;
continue;
}
@@ -3031,7 +3032,9 @@ int udp_lib_setsockopt(struct sock *sk, int level, int optname,
set_xfrm_gro_udp_encap_rcv(up->encap_type, sk->sk_family, sk);
sockopt_release_sock(sk);
break;
-
+ case UDP_STOP_RCV:
+ udp_assign_bit(STOP_RCV, sk, valbool);
+ break;
/*
* UDP-Lite's partial checksum coverage (RFC 3828).
*/
@@ -3120,6 +3123,10 @@ int udp_lib_getsockopt(struct sock *sk, int level, int optname,
val = udp_test_bit(GRO_ENABLED, sk);
break;
+ case UDP_STOP_RCV:
+ val = udp_test_bit(STOP_RCV, sk);
+ break;
+
/* The following two cannot be changed on UDP sockets, the return is
* always 0 (which corresponds to the full checksum coverage of UDP). */
case UDPLITE_SEND_CSCOV:
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 7317f8e053f1..55896a78e94b 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -137,7 +137,8 @@ static int compute_score(struct sock *sk, const struct net *net,
if (!net_eq(sock_net(sk), net) ||
udp_sk(sk)->udp_port_hash != hnum ||
- sk->sk_family != PF_INET6)
+ sk->sk_family != PF_INET6 ||
+ udp_test_bit(STOP_RCV, sk))
return -1;
if (!ipv6_addr_equal(&sk->sk_v6_rcv_saddr, daddr))
@@ -245,7 +246,7 @@ static struct sock *udp6_lib_lookup2(const struct net *net,
result = inet6_lookup_reuseport(net, sk, skb, sizeof(struct udphdr),
saddr, sport, daddr, hnum, udp6_ehashfn);
- if (!result) {
+ if (!result || udp_test_bit(STOP_RCV, result)) {
result = sk;
continue;
}
--
2.47.1
5 months, 3 weeks
- 3
- 5
[PATCH v3 0/3] RISC-V KVM selftests improvements
by Atish Patra
This series improves the following tests.
1. Get-reg-list : Adds vector support
2. SBI PMU test : Distinguish between different types of illegal exception
The first patch is just helper patch that adds stval support during
exception handling.
Signed-off-by: Atish Patra <atishp(a)rivosinc.com>
---
Changes in v3:
- Dropped the redundant macros and rv32 specific csr details.
- Changed to vcpu_get_reg from __vcpu_get_reg based on suggestion from Drew.
- Added RB tags from Drew.
- Link to v2: https://lore.kernel.org/r/20250429-kvm_selftest_improve-v2-0-51713f91e04a@r…
Changes in v2:
- Rebased on top of Linux 6.15-rc4
- Changed from ex_regs to pt_regs based on Drew's suggestion.
- Dropped Anup's review on PATCH1 as it is significantly changed from last review.
- Moved the instruction decoding macros to a common header file.
- Improved the vector reg list test as per the feedback.
- Link to v1: https://lore.kernel.org/r/20250324-kvm_selftest_improve-v1-0-583620219d4f@r…
---
Atish Patra (3):
KVM: riscv: selftests: Align the trap information wiht pt_regs
KVM: riscv: selftests: Decode stval to identify exact exception type
KVM: riscv: selftests: Add vector extension tests
.../selftests/kvm/include/riscv/processor.h | 23 +++-
tools/testing/selftests/kvm/lib/riscv/handlers.S | 139 +++++++++++----------
tools/testing/selftests/kvm/lib/riscv/processor.c | 2 +-
tools/testing/selftests/kvm/riscv/arch_timer.c | 2 +-
tools/testing/selftests/kvm/riscv/ebreak_test.c | 2 +-
tools/testing/selftests/kvm/riscv/get-reg-list.c | 132 +++++++++++++++++++
tools/testing/selftests/kvm/riscv/sbi_pmu_test.c | 24 +++-
7 files changed, 247 insertions(+), 77 deletions(-)
---
base-commit: f15d97df5afae16f40ecef942031235d1c6ba14f
change-id: 20250324-kvm_selftest_improve-9bedb9f0a6d3
--
Regards,
Atish patra
5 months, 3 weeks
- 2
- 4
[PATCH 0/2] Update kunit doc and tool with tips to build errors
by Shuah Khan
kunit kernel build could fail if there are ny build artifacts from a
prior kernel build. These can be hard to debug if the build artifact
happens to be generated header file. It took me a while to debug kunit
build fail on ARCH=x86_64 in a tree which had a generated header file
arch/x86/realmode/rm/pasyms.h
make ARCH=um mrproper will not clean the tree. It is necessary to run
make ARCH=x86_64 mrproper
Example work-flow that could lead to this:
make allmodconfig (x86_64)
make
./tools/testing/kunit/kunit.py run
Add this to the documentation and kunit.py build help message.
Shuah Khan (2):
doc: kunit: add information about cleaning source trees
kunit: add tips to clean source tree to build help message
Documentation/dev-tools/kunit/start.rst | 12 ++++++++++++
tools/testing/kunit/kunit.py | 2 +-
2 files changed, 13 insertions(+), 1 deletion(-)
--
2.47.2
5 months, 3 weeks
- 5
- 11
[PATCH RESEND] selftests/seccomp: fix syscall_restart test for arm compat
by Neill Kapron
The inconsistencies in the systcall ABI between arm and arm-compat can
can cause a failure in the syscall_restart test due to the logic
attempting to work around the differences. The 'machine' field for an
ARM64 device running in compat mode can report 'armv8l' or 'armv8b'
which matches with the string 'arm' when only examining the first three
characters of the string.
This change adds additional validation to the workaround logic to make
sure we only take the arm path when running natively, not in arm-compat.
Fixes: 256d0afb11d6 ("selftests/seccomp: build and pass on arm64")
Signed-off-by: Neill Kapron <nkapron(a)google.com>
---
tools/testing/selftests/seccomp/seccomp_bpf.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/seccomp/seccomp_bpf.c b/tools/testing/selftests/seccomp/seccomp_bpf.c
index b2f76a52215a..53bf6a9c801f 100644
--- a/tools/testing/selftests/seccomp/seccomp_bpf.c
+++ b/tools/testing/selftests/seccomp/seccomp_bpf.c
@@ -3166,12 +3166,15 @@ TEST(syscall_restart)
ret = get_syscall(_metadata, child_pid);
#if defined(__arm__)
/*
- * FIXME:
* - native ARM registers do NOT expose true syscall.
* - compat ARM registers on ARM64 DO expose true syscall.
+ * - values of utsbuf.machine include 'armv8l' or 'armb8b'
+ * for ARM64 running in compat mode.
*/
ASSERT_EQ(0, uname(&utsbuf));
- if (strncmp(utsbuf.machine, "arm", 3) == 0) {
+ if ((strncmp(utsbuf.machine, "arm", 3) == 0) &&
+ (strncmp(utsbuf.machine, "armv8l", 6) != 0) &&
+ (strncmp(utsbuf.machine, "armv8b", 6) != 0)) {
EXPECT_EQ(__NR_nanosleep, ret);
} else
#endif
--
2.49.0.850.g28803427d3-goog
5 months, 3 weeks
- 2
- 1
[PATCH v1 1/3] selftests: pidfd: add missing sys/mount.h include in pidfd_fdinfo_test.c
by Peter Seiderer
Fix compile on openSUSE Tumbleweed (gcc-14.2.1, glibc-2.40):
- add missing sys/mount.h include
Fixes:
pidfd_fdinfo_test.c: In function ‘child_fdinfo_nspid_test’:
pidfd_fdinfo_test.c:230:13: error: implicit declaration of function ‘mount’ [-Wimplicit-function-declaration]
230 | r = mount(NULL, "/", NULL, MS_REC | MS_PRIVATE, 0);
| ^~~~~
Signed-off-by: Peter Seiderer <ps.report(a)gmx.net>
---
tools/testing/selftests/pidfd/pidfd_fdinfo_test.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c b/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
index f062a986e382..f718aac75068 100644
--- a/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
+++ b/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
@@ -13,6 +13,7 @@
#include <syscall.h>
#include <sys/wait.h>
#include <sys/mman.h>
+#include <sys/mount.h>
#include "pidfd.h"
#include "../kselftest.h"
--
2.47.1
5 months, 3 weeks
- 2
- 5
[PATCH] kselftest: cpufreq: Get rid of double suspend in rtcwake case
by Nícolas F. R. A. Prado
Commit 0b631ed3ce92 ("kselftest: cpufreq: Add RTC wakeup alarm") added
support for automatic wakeup in the suspend routine of the cpufreq
kselftest by using rtcwake, however it left the manual power state
change in the common path. The end result is that when running the
cpufreq kselftest with '-t suspend_rtc' or '-t hibernate_rtc', the
system will go to sleep and be woken up by the RTC, but then immediately
go to sleep again with no wakeup programmed, so it will sleep forever in
an automated testing setup.
Fix this by moving the manual power state change so that it only happens
when not using rtcwake.
Fixes: 0b631ed3ce92 ("kselftest: cpufreq: Add RTC wakeup alarm")
Signed-off-by: Nícolas F. R. A. Prado <nfraprado(a)collabora.com>
---
tools/testing/selftests/cpufreq/cpufreq.sh | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/cpufreq/cpufreq.sh b/tools/testing/selftests/cpufreq/cpufreq.sh
index e350c521b4675080943d2c74dc31533979410316..3aad9db921b5339585da5711a08775ebd965aaf3 100755
--- a/tools/testing/selftests/cpufreq/cpufreq.sh
+++ b/tools/testing/selftests/cpufreq/cpufreq.sh
@@ -244,9 +244,10 @@ do_suspend()
printf "Failed to suspend using RTC wake alarm\n"
return 1
fi
+ else
+ echo $filename > $SYSFS/power/state
fi
- echo $filename > $SYSFS/power/state
printf "Came out of $1\n"
printf "Do basic tests after finishing $1 to verify cpufreq state\n\n"
---
base-commit: 8a2d53ce3c5f82683ad3df9a9a55822816fe64e7
change-id: 20250429-ksft-cpufreq-suspend-rtc-double-fix-75c560e1a30f
Best regards,
--
Nícolas F. R. A. Prado <nfraprado(a)collabora.com>
5 months, 3 weeks
- 1
- 0
[PATCH v4 0/5] Add support for the Bus Lock Threshold
by Manali Shukla
Misbehaving guests can cause bus locks to degrade the performance of
a system. Non-WB (write-back) and misaligned locked RMW (read-modify-write)
instructions are referred to as "bus locks" and require system wide
synchronization among all processors to guarantee the atomicity. The bus
locks can impose notable performance penalties for all processors within
the system.
Support for the Bus Lock Threshold is indicated by CPUID
Fn8000_000A_EDX[29] BusLockThreshold=1, the VMCB provides a Bus Lock
Threshold enable bit and an unsigned 16-bit Bus Lock Threshold count.
VMCB intercept bit
VMCB Offset Bits Function
14h 5 Intercept bus lock operations
Bus lock threshold count
VMCB Offset Bits Function
120h 15:0 Bus lock counter
During VMRUN, the bus lock threshold count is fetched and stored in an
internal count register. Prior to executing a bus lock within the guest,
the processor verifies the count in the bus lock register. If the count is
greater than zero, the processor executes the bus lock, reducing the count.
However, if the count is zero, the bus lock operation is not performed, and
instead, a Bus Lock Threshold #VMEXIT is triggered to transfer control to
the Virtual Machine Monitor (VMM).
A Bus Lock Threshold #VMEXIT is reported to the VMM with VMEXIT code 0xA5h,
VMEXIT_BUSLOCK. EXITINFO1 and EXITINFO2 are set to 0 on a VMEXIT_BUSLOCK.
On a #VMEXIT, the processor writes the current value of the Bus Lock
Threshold Counter to the VMCB.
Note: Currently, virtualizing the Bus Lock Threshold feature for L1 guest is
not supported.
More details about the Bus Lock Threshold feature can be found in AMD APM
[1].
v3 -> v4
- Incorporated Sean's review comments
- Added a preparatory patch to move linear_rip out of kvm_pio_request, so
that it can be used by the bus lock threshold patches.
- Added complete_userspace_buslock() function to reload bus_lock_counter
to '1' only if the usespace has not changed the RIP.
- Added changes to continue running bus_lock_counter accross the nested
transitions.
v2 -> v3
- Drop parch to add virt tag in /proc/cpuinfo.
- Incorporated Tom's review comments.
v1 -> v2
- Incorporated misc review comments from Sean.
- Removed bus_lock_counter module parameter.
- Set the value of bus_lock_counter to zero by default and reload the value by 1
in bus lock exit handler.
- Add documentation for the behavioral difference for KVM_EXIT_BUS_LOCK.
- Improved selftest for buslock to work on SVM and VMX.
- Rewrite the commit messages.
Patches are prepared on kvm-next/next (c9ea48bb6ee6).
Testing done:
- Tested the Bus Lock Threshold functionality on normal, SEV, SEV-ES and SEV-SNP guests.
- Tested the Bus Lock Threshold functionality on nested guests.
v1: https://lore.kernel.org/kvm/20240709175145.9986-4-manali.shukla@amd.com/T/
v2: https://lore.kernel.org/kvm/20241001063413.687787-4-manali.shukla@amd.com/T/
v3: https://lore.kernel.org/kvm/20241004053341.5726-1-manali.shukla@amd.com/T/
[1]: AMD64 Architecture Programmer's Manual Pub. 24593, April 2024,
Vol 2, 15.14.5 Bus Lock Threshold.
https://bugzilla.kernel.org/attachment.cgi?id=306250
Manali Shukla (3):
KVM: x86: Preparatory patch to move linear_rip out of kvm_pio_request
x86/cpufeatures: Add CPUID feature bit for the Bus Lock Threshold
KVM: SVM: Add support for KVM_CAP_X86_BUS_LOCK_EXIT on SVM CPUs
Nikunj A Dadhania (2):
KVM: SVM: Enable Bus lock threshold exit
KVM: selftests: Add bus lock exit test
Documentation/virt/kvm/api.rst | 19 +++
arch/x86/include/asm/cpufeatures.h | 1 +
arch/x86/include/asm/kvm_host.h | 2 +-
arch/x86/include/asm/svm.h | 5 +-
arch/x86/include/uapi/asm/svm.h | 2 +
arch/x86/kvm/svm/nested.c | 42 ++++++
arch/x86/kvm/svm/svm.c | 38 +++++
arch/x86/kvm/svm/svm.h | 2 +
arch/x86/kvm/x86.c | 8 +-
tools/testing/selftests/kvm/Makefile.kvm | 1 +
.../selftests/kvm/x86/kvm_buslock_test.c | 135 ++++++++++++++++++
11 files changed, 249 insertions(+), 6 deletions(-)
create mode 100644 tools/testing/selftests/kvm/x86/kvm_buslock_test.c
base-commit: c9ea48bb6ee6b28bbc956c1e8af98044618fed5e
--
2.34.1
5 months, 3 weeks
- 4
- 21
[PATCH 0/4] selftest: can: Start importing selftests from can-tests
by Felix Maurer
This is the initial import of a CAN selftest from can-tests[1] into the
tree. For now, it is just a single test but when agreed on the
structure, we intend to import more tests from can-tests and add
additional test cases.
The goal of moving the CAN selftests into the tree is to align the tests
more closely with the kernel, improve testing of CAN in general, and to
simplify running the tests automatically in the various kernel CI
systems.
I have cc'ed netdev and its reviewers and maintainers to make sure they
are okay with the location of the tests and the changes to the paths in
MAINTAINERS. The changes should be merged through linux-can-next and
subsequent changes will not go to netdev anymore.
[1]: https://github.com/linux-can/can-tests
Felix Maurer (4):
selftests: can: Import tst-filter from can-tests
selftests: can: use kselftest harness in test_raw_filter
selftests: can: Use fixtures in test_raw_filter
selftests: can: Document test_raw_filter test cases
MAINTAINERS | 2 +
tools/testing/selftests/Makefile | 1 +
tools/testing/selftests/net/can/.gitignore | 2 +
tools/testing/selftests/net/can/Makefile | 11 +
.../selftests/net/can/test_raw_filter.c | 338 ++++++++++++++++++
.../selftests/net/can/test_raw_filter.sh | 37 ++
6 files changed, 391 insertions(+)
create mode 100644 tools/testing/selftests/net/can/.gitignore
create mode 100644 tools/testing/selftests/net/can/Makefile
create mode 100644 tools/testing/selftests/net/can/test_raw_filter.c
create mode 100755 tools/testing/selftests/net/can/test_raw_filter.sh
--
2.49.0
5 months, 3 weeks
- 3
- 18
[PATCH v2 0/3] RISC-V KVM selftests improvements
by Atish Patra
This series improves the following tests.
1. Get-reg-list : Adds vector support
2. SBI PMU test : Distinguish between different types of illegal exception
The first patch is just helper patch that adds stval support during
exception handling.
Signed-off-by: Atish Patra <atishp(a)rivosinc.com>
---
Changes in v2:
- Rebased on top of Linux 6.15-rc4
- Changed from ex_regs to pt_regs based on Drew's suggestion.
- Dropped Anup's review on PATCH1 as it is significantly changed from last review.
- Moved the instruction decoding macros to a common header file.
- Improved the vector reg list test as per the feedback.
- Link to v1: https://lore.kernel.org/r/20250324-kvm_selftest_improve-v1-0-583620219d4f@r…
---
Atish Patra (3):
KVM: riscv: selftests: Align the trap information wiht pt_regs
KVM: riscv: selftests: Decode stval to identify exact exception type
KVM: riscv: selftests: Add vector extension tests
.../selftests/kvm/include/riscv/processor.h | 23 ++-
tools/testing/selftests/kvm/lib/riscv/handlers.S | 164 ++++++++++++---------
tools/testing/selftests/kvm/lib/riscv/processor.c | 2 +-
tools/testing/selftests/kvm/riscv/arch_timer.c | 2 +-
tools/testing/selftests/kvm/riscv/ebreak_test.c | 2 +-
tools/testing/selftests/kvm/riscv/get-reg-list.c | 133 +++++++++++++++++
tools/testing/selftests/kvm/riscv/sbi_pmu_test.c | 24 ++-
7 files changed, 270 insertions(+), 80 deletions(-)
---
base-commit: f15d97df5afae16f40ecef942031235d1c6ba14f
change-id: 20250324-kvm_selftest_improve-9bedb9f0a6d3
--
Regards,
Atish patra
5 months, 3 weeks
- 3
- 9
[PATCH v14 00/27] riscv control-flow integrity for usermode
by Deepak Gupta
Basics and overview
===================
Software with larger attack surfaces (e.g. network facing apps like databases,
browsers or apps relying on browser runtimes) suffer from memory corruption
issues which can be utilized by attackers to bend control flow of the program
to eventually gain control (by making their payload executable). Attackers are
able to perform such attacks by leveraging call-sites which rely on indirect
calls or return sites which rely on obtaining return address from stack memory.
To mitigate such attacks, risc-v extension zicfilp enforces that all indirect
calls must land on a landing pad instruction `lpad` else cpu will raise software
check exception (a new cpu exception cause code on riscv).
Similarly for return flow, risc-v extension zicfiss extends architecture with
- `sspush` instruction to push return address on a shadow stack
- `sspopchk` instruction to pop return address from shadow stack
and compare with input operand (i.e. return address on stack)
- `sspopchk` to raise software check exception if comparision above
was a mismatch
- Protection mechanism using which shadow stack is not writeable via
regular store instructions
More information an details can be found at extensions github repo [1].
Equivalent to landing pad (zicfilp) on x86 is `ENDBRANCH` instruction in Intel
CET [3] and branch target identification (BTI) [4] on arm.
Similarly x86's Intel CET has shadow stack [5] and arm64 has guarded control
stack (GCS) [6] which are very similar to risc-v's zicfiss shadow stack.
x86 and arm64 support for user mode shadow stack is already in mainline.
Kernel awareness for user control flow integrity
================================================
This series picks up Samuel Holland's envcfg changes [2] as well. So if those are
being applied independently, they should be removed from this series.
Enabling:
In order to maintain compatibility and not break anything in user mode, kernel
doesn't enable control flow integrity cpu extensions on binary by default.
Instead exposes a prctl interface to enable, disable and lock the shadow stack
or landing pad feature for a task. This allows userspace (loader) to enumerate
if all objects in its address space are compiled with shadow stack and landing
pad support and accordingly enable the feature. Additionally if a subsequent
`dlopen` happens on a library, user mode can take a decision again to disable
the feature (if incoming library is not compiled with support) OR terminate the
task (if user mode policy is strict to have all objects in address space to be
compiled with control flow integirty cpu feature). prctl to enable shadow stack
results in allocating shadow stack from virtual memory and activating for user
address space. x86 and arm64 are also following same direction due to similar
reason(s).
clone/fork:
On clone and fork, cfi state for task is inherited by child. Shadow stack is
part of virtual memory and is a writeable memory from kernel perspective
(writeable via a restricted set of instructions aka shadow stack instructions)
Thus kernel changes ensure that this memory is converted into read-only when
fork/clone happens and COWed when fault is taken due to sspush, sspopchk or
ssamoswap. In case `CLONE_VM` is specified and shadow stack is to be enabled,
kernel will automatically allocate a shadow stack for that clone call.
map_shadow_stack:
x86 introduced `map_shadow_stack` system call to allow user space to explicitly
map shadow stack memory in its address space. It is useful to allocate shadow
for different contexts managed by a single thread (green threads or contexts)
risc-v implements this system call as well.
signal management:
If shadow stack is enabled for a task, kernel performs an asynchronous control
flow diversion to deliver the signal and eventually expects userspace to issue
sigreturn so that original execution can be resumed. Even though resume context
is prepared by kernel, it is in user space memory and is subject to memory
corruption and corruption bugs can be utilized by attacker in this race window
to perform arbitrary sigreturn and eventually bypass cfi mechanism.
Another issue is how to ensure that cfi related state on sigcontext area is not
trampled by legacy apps or apps compiled with old kernel headers.
In order to mitigate control-flow hijacting, kernel prepares a token and place
it on shadow stack before signal delivery and places address of token in
sigcontext structure. During sigreturn, kernel obtains address of token from
sigcontext struture, reads token from shadow stack and validates it and only
then allow sigreturn to succeed. Compatiblity issue is solved by adopting
dynamic sigcontext management introduced for vector extension. This series
re-factor the code little bit to allow future sigcontext management easy (as
proposed by Andy Chiu from SiFive)
config and compilation:
Introduce a new risc-v config option `CONFIG_RISCV_USER_CFI`. Selecting this
config option picks the kernel support for user control flow integrity. This
optin is presented only if toolchain has shadow stack and landing pad support.
And is on purpose guarded by toolchain support. Reason being that eventually
vDSO also needs to be compiled in with shadow stack and landing pad support.
vDSO compile patches are not included as of now because landing pad labeling
scheme is yet to settle for usermode runtime.
To get more information on kernel interactions with respect to
zicfilp and zicfiss, patch series adds documentation for
`zicfilp` and `zicfiss` in following:
Documentation/arch/riscv/zicfiss.rst
Documentation/arch/riscv/zicfilp.rst
How to test this series
=======================
Toolchain
---------
$ git clone git@github.com:sifive/riscv-gnu-toolchain.git -b cfi-dev
$ riscv-gnu-toolchain/configure --prefix=<path-to-where-to-build> --with-arch=rv64gc_zicfilp_zicfiss --enable-linux --disable-gdb --with-extra-multilib-test="rv64gc_zicfilp_zicfiss-lp64d:-static"
$ make -j$(nproc)
Qemu
----
Get the lastest qemu
$ cd qemu
$ mkdir build
$ cd build
$ ../configure --target-list=riscv64-softmmu
$ make -j$(nproc)
Opensbi
-------
$ git clone git@github.com:deepak0414/opensbi.git -b v6_cfi_spec_split_opensbi
$ make CROSS_COMPILE=<your riscv toolchain> -j$(nproc) PLATFORM=generic
Linux
-----
Running defconfig is fine. CFI is enabled by default if the toolchain
supports it.
$ make ARCH=riscv CROSS_COMPILE=<path-to-cfi-riscv-gnu-toolchain>/build/bin/riscv64-unknown-linux-gnu- -j$(nproc) defconfig
$ make ARCH=riscv CROSS_COMPILE=<path-to-cfi-riscv-gnu-toolchain>/build/bin/riscv64-unknown-linux-gnu- -j$(nproc)
In case you're building your own rootfs using toolchain, please make sure you
pick following patch to ensure that vDSO compiled with lpad and shadow stack.
"arch/riscv: compile vdso with landing pad"
Branch where above patch can be picked
https://github.com/deepak0414/linux-riscv-cfi/tree/vdso_user_cfi_v6.12-rc1
Running
-------
Modify your qemu command to have:
-bios <path-to-cfi-opensbi>/build/platform/generic/firmware/fw_dynamic.bin
-cpu rv64,zicfilp=true,zicfiss=true,zimop=true,zcmop=true
vDSO related Opens (in the flux)
=================================
I am listing these opens for laying out plan and what to expect in future
patch sets. And of course for the sake of discussion.
Shadow stack and landing pad enabling in vDSO
----------------------------------------------
vDSO must have shadow stack and landing pad support compiled in for task
to have shadow stack and landing pad support. This patch series doesn't
enable that (yet). Enabling shadow stack support in vDSO should be
straight forward (intend to do that in next versions of patch set). Enabling
landing pad support in vDSO requires some collaboration with toolchain folks
to follow a single label scheme for all object binaries. This is necessary to
ensure that all indirect call-sites are setting correct label and target landing
pads are decorated with same label scheme.
How many vDSOs
---------------
Shadow stack instructions are carved out of zimop (may be operations) and if CPU
doesn't implement zimop, they're illegal instructions. Kernel could be running on
a CPU which may or may not implement zimop. And thus kernel will have to carry 2
different vDSOs and expose the appropriate one depending on whether CPU implements
zimop or not.
References
==========
[1] - https://github.com/riscv/riscv-cfi
[2] - https://lore.kernel.org/all/20240814081126.956287-1-samuel.holland@sifive.c…
[3] - https://lwn.net/Articles/889475/
[4] - https://developer.arm.com/documentation/109576/0100/Branch-Target-Identific…
[5] - https://www.intel.com/content/dam/develop/external/us/en/documents/catc17-i…
[6] - https://lwn.net/Articles/940403/
To: Thomas Gleixner <tglx(a)linutronix.de>
To: Ingo Molnar <mingo(a)redhat.com>
To: Borislav Petkov <bp(a)alien8.de>
To: Dave Hansen <dave.hansen(a)linux.intel.com>
To: x86(a)kernel.org
To: H. Peter Anvin <hpa(a)zytor.com>
To: Andrew Morton <akpm(a)linux-foundation.org>
To: Liam R. Howlett <Liam.Howlett(a)oracle.com>
To: Vlastimil Babka <vbabka(a)suse.cz>
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To: Albert Ou <aou(a)eecs.berkeley.edu>
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To: Arnd Bergmann <arnd(a)arndb.de>
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To: Conor Dooley <conor+dt(a)kernel.org>
To: Miguel Ojeda <ojeda(a)kernel.org>
To: Alex Gaynor <alex.gaynor(a)gmail.com>
To: Boqun Feng <boqun.feng(a)gmail.com>
To: Gary Guo <gary(a)garyguo.net>
To: Björn Roy Baron <bjorn3_gh(a)protonmail.com>
To: Benno Lossin <benno.lossin(a)proton.me>
To: Andreas Hindborg <a.hindborg(a)kernel.org>
To: Alice Ryhl <aliceryhl(a)google.com>
To: Trevor Gross <tmgross(a)umich.edu>
Cc: linux-kernel(a)vger.kernel.org
Cc: linux-fsdevel(a)vger.kernel.org
Cc: linux-mm(a)kvack.org
Cc: linux-riscv(a)lists.infradead.org
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Cc: alistair.francis(a)wdc.com
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Cc: jim.shu(a)sifive.com
Cc: andybnac(a)gmail.com
Cc: kito.cheng(a)sifive.com
Cc: charlie(a)rivosinc.com
Cc: atishp(a)rivosinc.com
Cc: evan(a)rivosinc.com
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Cc: alexghiti(a)rivosinc.com
Cc: samitolvanen(a)google.com
Cc: broonie(a)kernel.org
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Cc: rust-for-linux(a)vger.kernel.org
changelog
---------
v14:
- rebased on top of palmer/sbi-v3. Thus dropped clement's FWFT patches
Updated RISCV_ISA_EXT_XXXX in hwcap and hwprobe constants.
- Took Radim's suggestions on bitfields.
- Placed cfi_state at the end of thread_info block so that current situation
is not disturbed with respect to member fields of thread_info in single
cacheline.
v13:
- cpu_supports_shadow_stack/cpu_supports_indirect_br_lp_instr uses
riscv_has_extension_unlikely()
- uses nops(count) to create nop slide
- RISCV_ACQUIRE_BARRIER is not needed in `amo_user_shstk`. Removed it
- changed ternaries to simply use implicit casting to convert to bool.
- kernel command line allows to disable zicfilp and zicfiss independently.
updated kernel-parameters.txt.
- ptrace user abi for cfi uses bitmasks instead of bitfields. Added ptrace
kselftest.
- cosmetic and grammatical changes to documentation.
v12:
- It seems like I had accidently squashed arch agnostic indirect branch
tracking prctl and riscv implementation of those prctls. Split them again.
- set_shstk_status/set_indir_lp_status perform CSR writes only when CPU
support is available. As suggested by Zong Li.
- Some minor clean up in kselftests as suggested by Zong Li.
v11:
- patch "arch/riscv: compile vdso with landing pad" was unconditionally
selecting `_zicfilp` for vDSO compile. fixed that. Changed `lpad 1` to
to `lpad 0`.
v10:
- dropped "mm: helper `is_shadow_stack_vma` to check shadow stack vma". This patch
is not that interesting to this patch series for risc-v. There are instances in
arch directories where VM_SHADOW_STACK flag is anyways used. Dropping this patch
to expedite merging in riscv tree.
- Took suggestions from `Clement` on "riscv: zicfiss / zicfilp enumeration" to
validate presence of cfi based on config.
- Added a patch for vDSO to have `lpad 0`. I had omitted this earlier to make sure
we add single vdso object with cfi enabled. But a vdso object with scheme of
zero labeled landing pad is least common denominator and should work with all
objects of zero labeled as well as function-signature labeled objects.
v9:
- rebased on master (39a803b754d5 fix braino in "9p: fix ->rename_sem exclusion")
- dropped "mm: Introduce ARCH_HAS_USER_SHADOW_STACK" (master has it from arm64/gcs)
- dropped "prctl: arch-agnostic prctl for shadow stack" (master has it from arm64/gcs)
v8:
- rebased on palmer/for-next
- dropped samuel holland's `envcfg` context switch patches.
they are in parlmer/for-next
v7:
- Removed "riscv/Kconfig: enable HAVE_EXIT_THREAD for riscv"
Instead using `deactivate_mm` flow to clean up.
see here for more context
https://lore.kernel.org/all/20230908203655.543765-1-rick.p.edgecombe@intel.…
- Changed the header include in `kselftest`. Hopefully this fixes compile
issue faced by Zong Li at SiFive.
- Cleaned up an orphaned change to `mm/mmap.c` in below patch
"riscv/mm : ensure PROT_WRITE leads to VM_READ | VM_WRITE"
- Lock interfaces for shadow stack and indirect branch tracking expect arg == 0
Any future evolution of this interface should accordingly define how arg should
be setup.
- `mm/map.c` has an instance of using `VM_SHADOW_STACK`. Fixed it to use helper
`is_shadow_stack_vma`.
- Link to v6: https://lore.kernel.org/r/20241008-v5_user_cfi_series-v6-0-60d9fe073f37@riv…
v6:
- Picked up Samuel Holland's changes as is with `envcfg` placed in
`thread` instead of `thread_info`
- fixed unaligned newline escapes in kselftest
- cleaned up messages in kselftest and included test output in commit message
- fixed a bug in clone path reported by Zong Li
- fixed a build issue if CONFIG_RISCV_ISA_V is not selected
(this was introduced due to re-factoring signal context
management code)
v5:
- rebased on v6.12-rc1
- Fixed schema related issues in device tree file
- Fixed some of the documentation related issues in zicfilp/ss.rst
(style issues and added index)
- added `SHADOW_STACK_SET_MARKER` so that implementation can define base
of shadow stack.
- Fixed warnings on definitions added in usercfi.h when
CONFIG_RISCV_USER_CFI is not selected.
- Adopted context header based signal handling as proposed by Andy Chiu
- Added support for enabling kernel mode access to shadow stack using
FWFT
(https://github.com/riscv-non-isa/riscv-sbi-doc/blob/master/src/ext-firmware…)
- Link to v5: https://lore.kernel.org/r/20241001-v5_user_cfi_series-v1-0-3ba65b6e550f@riv…
(Note: I had an issue in my workflow due to which version number wasn't
picked up correctly while sending out patches)
v4:
- rebased on 6.11-rc6
- envcfg: Converged with Samuel Holland's patches for envcfg management on per-
thread basis.
- vma_is_shadow_stack is renamed to is_vma_shadow_stack
- picked up Mark Brown's `ARCH_HAS_USER_SHADOW_STACK` patch
- signal context: using extended context management to maintain compatibility.
- fixed `-Wmissing-prototypes` compiler warnings for prctl functions
- Documentation fixes and amending typos.
- Link to v4: https://lore.kernel.org/all/20240912231650.3740732-1-debug@rivosinc.com/
v3:
- envcfg
logic to pick up base envcfg had a bug where `ENVCFG_CBZE` could have been
picked on per task basis, even though CPU didn't implement it. Fixed in
this series.
- dt-bindings
As suggested, split into separate commit. fixed the messaging that spec is
in public review
- arch_is_shadow_stack change
arch_is_shadow_stack changed to vma_is_shadow_stack
- hwprobe
zicfiss / zicfilp if present will get enumerated in hwprobe
- selftests
As suggested, added object and binary filenames to .gitignore
Selftest binary anyways need to be compiled with cfi enabled compiler which
will make sure that landing pad and shadow stack are enabled. Thus removed
separate enable/disable tests. Cleaned up tests a bit.
- Link to v3: https://lore.kernel.org/lkml/20240403234054.2020347-1-debug@rivosinc.com/
v2:
- Using config `CONFIG_RISCV_USER_CFI`, kernel support for riscv control flow
integrity for user mode programs can be compiled in the kernel.
- Enabling of control flow integrity for user programs is left to user runtime
- This patch series introduces arch agnostic `prctls` to enable shadow stack
and indirect branch tracking. And implements them on riscv.
---
Changes in v14:
- changelog posted just below cover letter
- Link to v13: https://lore.kernel.org/r/20250424-v5_user_cfi_series-v13-0-971437de586a@ri…
Changes in v13:
- changelog posted just below cover letter
- Link to v12: https://lore.kernel.org/r/20250314-v5_user_cfi_series-v12-0-e51202b53138@ri…
Changes in v12:
- changelog posted just below cover letter
- Link to v11: https://lore.kernel.org/r/20250310-v5_user_cfi_series-v11-0-86b36cbfb910@ri…
Changes in v11:
- changelog posted just below cover letter
- Link to v10: https://lore.kernel.org/r/20250210-v5_user_cfi_series-v10-0-163dcfa31c60@ri…
---
Andy Chiu (1):
riscv: signal: abstract header saving for setup_sigcontext
Deepak Gupta (25):
mm: VM_SHADOW_STACK definition for riscv
dt-bindings: riscv: zicfilp and zicfiss in dt-bindings (extensions.yaml)
riscv: zicfiss / zicfilp enumeration
riscv: zicfiss / zicfilp extension csr and bit definitions
riscv: usercfi state for task and save/restore of CSR_SSP on trap entry/exit
riscv/mm : ensure PROT_WRITE leads to VM_READ | VM_WRITE
riscv mm: manufacture shadow stack pte
riscv mmu: teach pte_mkwrite to manufacture shadow stack PTEs
riscv mmu: write protect and shadow stack
riscv/mm: Implement map_shadow_stack() syscall
riscv/shstk: If needed allocate a new shadow stack on clone
riscv: Implements arch agnostic shadow stack prctls
prctl: arch-agnostic prctl for indirect branch tracking
riscv: Implements arch agnostic indirect branch tracking prctls
riscv/traps: Introduce software check exception
riscv/signal: save and restore of shadow stack for signal
riscv/kernel: update __show_regs to print shadow stack register
riscv/ptrace: riscv cfi status and state via ptrace and in core files
riscv/hwprobe: zicfilp / zicfiss enumeration in hwprobe
riscv: kernel command line option to opt out of user cfi
riscv: enable kernel access to shadow stack memory via FWFT sbi call
riscv: create a config for shadow stack and landing pad instr support
riscv: Documentation for landing pad / indirect branch tracking
riscv: Documentation for shadow stack on riscv
kselftest/riscv: kselftest for user mode cfi
Jim Shu (1):
arch/riscv: compile vdso with landing pad
Documentation/admin-guide/kernel-parameters.txt | 8 +
Documentation/arch/riscv/index.rst | 2 +
Documentation/arch/riscv/zicfilp.rst | 115 +++++
Documentation/arch/riscv/zicfiss.rst | 179 +++++++
.../devicetree/bindings/riscv/extensions.yaml | 14 +
arch/riscv/Kconfig | 20 +
arch/riscv/Makefile | 5 +-
arch/riscv/include/asm/asm-prototypes.h | 1 +
arch/riscv/include/asm/assembler.h | 44 ++
arch/riscv/include/asm/cpufeature.h | 12 +
arch/riscv/include/asm/csr.h | 16 +
arch/riscv/include/asm/entry-common.h | 2 +
arch/riscv/include/asm/hwcap.h | 2 +
arch/riscv/include/asm/mman.h | 25 +
arch/riscv/include/asm/mmu_context.h | 7 +
arch/riscv/include/asm/pgtable.h | 30 +-
arch/riscv/include/asm/processor.h | 2 +
arch/riscv/include/asm/thread_info.h | 3 +
arch/riscv/include/asm/usercfi.h | 95 ++++
arch/riscv/include/asm/vector.h | 3 +
arch/riscv/include/uapi/asm/hwprobe.h | 2 +
arch/riscv/include/uapi/asm/ptrace.h | 34 ++
arch/riscv/include/uapi/asm/sigcontext.h | 1 +
arch/riscv/kernel/Makefile | 1 +
arch/riscv/kernel/asm-offsets.c | 8 +
arch/riscv/kernel/cpufeature.c | 13 +
arch/riscv/kernel/entry.S | 33 +-
arch/riscv/kernel/head.S | 23 +
arch/riscv/kernel/process.c | 26 +-
arch/riscv/kernel/ptrace.c | 95 ++++
arch/riscv/kernel/signal.c | 148 +++++-
arch/riscv/kernel/sys_hwprobe.c | 2 +
arch/riscv/kernel/sys_riscv.c | 10 +
arch/riscv/kernel/traps.c | 43 ++
arch/riscv/kernel/usercfi.c | 545 +++++++++++++++++++++
arch/riscv/kernel/vdso/Makefile | 6 +
arch/riscv/kernel/vdso/flush_icache.S | 4 +
arch/riscv/kernel/vdso/getcpu.S | 4 +
arch/riscv/kernel/vdso/rt_sigreturn.S | 4 +
arch/riscv/kernel/vdso/sys_hwprobe.S | 4 +
arch/riscv/mm/init.c | 2 +-
arch/riscv/mm/pgtable.c | 17 +
include/linux/cpu.h | 4 +
include/linux/mm.h | 7 +
include/uapi/linux/elf.h | 2 +
include/uapi/linux/prctl.h | 27 +
kernel/sys.c | 30 ++
tools/testing/selftests/riscv/Makefile | 2 +-
tools/testing/selftests/riscv/cfi/.gitignore | 3 +
tools/testing/selftests/riscv/cfi/Makefile | 10 +
tools/testing/selftests/riscv/cfi/cfi_rv_test.h | 82 ++++
tools/testing/selftests/riscv/cfi/riscv_cfi_test.c | 171 +++++++
tools/testing/selftests/riscv/cfi/shadowstack.c | 385 +++++++++++++++
tools/testing/selftests/riscv/cfi/shadowstack.h | 27 +
54 files changed, 2331 insertions(+), 29 deletions(-)
---
base-commit: 4181f8ad7a1061efed0219951d608d4988302af7
change-id: 20240930-v5_user_cfi_series-3dc332f8f5b2
--
- debug
5 months, 4 weeks
- 1
- 27
[PATCH AUTOSEL 6.1 08/10] selftests/bpf: Mitigate sockmap_ktls disconnect_after_delete failure
by Sasha Levin
From: Ihor Solodrai <ihor.solodrai(a)linux.dev>
[ Upstream commit f2858f308131a09e33afb766cd70119b5b900569 ]
"sockmap_ktls disconnect_after_delete" test has been failing on BPF CI
after recent merges from netdev:
* https://github.com/kernel-patches/bpf/actions/runs/14458537639
* https://github.com/kernel-patches/bpf/actions/runs/14457178732
It happens because disconnect has been disabled for TLS [1], and it
renders the test case invalid.
Removing all the test code creates a conflict between bpf and
bpf-next, so for now only remove the offending assert [2].
The test will be removed later on bpf-next.
[1] https://lore.kernel.org/netdev/20250404180334.3224206-1-kuba@kernel.org/
[2] https://lore.kernel.org/bpf/cfc371285323e1a3f3b006bfcf74e6cf7ad65258@linux.…
Signed-off-by: Ihor Solodrai <ihor.solodrai(a)linux.dev>
Signed-off-by: Andrii Nakryiko <andrii(a)kernel.org>
Reviewed-by: Jiayuan Chen <jiayuan.chen(a)linux.dev>
Link: https://lore.kernel.org/bpf/20250416170246.2438524-1-ihor.solodrai@linux.dev
Signed-off-by: Alexei Starovoitov <ast(a)kernel.org>
Signed-off-by: Sasha Levin <sashal(a)kernel.org>
---
tools/testing/selftests/bpf/prog_tests/sockmap_ktls.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/tools/testing/selftests/bpf/prog_tests/sockmap_ktls.c b/tools/testing/selftests/bpf/prog_tests/sockmap_ktls.c
index 2d0796314862a..0a99fd404f6dc 100644
--- a/tools/testing/selftests/bpf/prog_tests/sockmap_ktls.c
+++ b/tools/testing/selftests/bpf/prog_tests/sockmap_ktls.c
@@ -68,7 +68,6 @@ static void test_sockmap_ktls_disconnect_after_delete(int family, int map)
goto close_cli;
err = disconnect(cli);
- ASSERT_OK(err, "disconnect");
close_cli:
close(cli);
--
2.39.5
5 months, 4 weeks
- 1
- 0
[PATCH bpf-next v1 0/3] bpf, sockmap: Improve performance with CPU affinity
by Jiayuan Chen
Abstract
===
This patchset improves the performance of sockmap by providing CPU affinity,
resulting in a 1-10x increase in throughput.
Motivation
===
Traditional user-space reverse proxy:
Reserve Proxy
_________________
client -> | fd1 <-> fd2 | -> server
|_________________|
Using sockmap for reverse proxy:
Reserve Proxy
_________________
client -> | fd1 <-> fd2 | -> server
| |_________________| |
| | | |
| _________ |
| | sockmap | |
--> |_________| -->
By adding fds to sockmap and using a BPF program, we can quickly forward
data and avoid data copying between user space and kernel space.
Mainstream multi-process reverse proxy applications, such as Nginx and
HAProxy, support CPU affinity settings, which allow each process to be
pinned to a specific CPU, avoiding conflicts between data plane processes
and other processes, especially in multi-tenant environments.
Current Issues
===
The current design of sockmap uses a workqueue to forward ingress_skb and
wakes up the workqueue without specifying a CPU
(by calling schedule_delayed_work()). In the current implementation of
schedule_delayed_work, it tends to run the workqueue on the current CPU.
This approach has a high probability of running on the current CPU, which
is the same CPU that handles the net rx soft interrupt, especially for
programs that access each other using local interfaces.
The loopback driver's transmit interface, loopback_xmit(), directly calls
__netif_rx() on the current CPU, which means that the CPU handling
sockmap's workqueue and the client's sending CPU are the same, resulting
in contention.
For a TCP flow, if the request or response is very large, the
psock->ingress_skb queue can become very long. When the workqueue
traverses this queue to forward the data, it can consume a significant
amount of CPU time.
Solution
===
Configuring RPS on a loopback interface can be useful, but it will trigger
additional softirq, and furthermore, it fails to achieve our expected
effect of CPU isolation from other processes.
Instead, we provide a kfunc that allow users to specify the CPU on which
the workqueue runs through a BPF program.
We can use the existing benchmark to test the performance, which allows
us to evaluate the effectiveness of this optimization.
Because we use local interfaces for communication and the client consumes
a significant amount of CPU when sending data, this prevents the workqueue
from processing ingress_skb in a timely manner, ultimately causing the
server to fail to read data quickly.
Without cpu-affinity:
./bench sockmap -c 2 -p 1 -a --rx-verdict-ingress --no-verify
Setting up benchmark 'sockmap'...
create socket fd c1:14 p1:15 c2:16 p2:17
Benchmark 'sockmap' started.
Iter 0 ( 36.031us): Send Speed 1143.693 MB/s ... Rcv Speed 109.572 MB/s
Iter 1 ( 0.608us): Send Speed 1320.550 MB/s ... Rcv Speed 48.103 MB/s
Iter 2 ( -5.448us): Send Speed 1314.790 MB/s ... Rcv Speed 47.842 MB/s
Iter 3 ( -0.613us): Send Speed 1320.158 MB/s ... Rcv Speed 46.531 MB/s
Iter 4 ( -3.441us): Send Speed 1319.375 MB/s ... Rcv Speed 46.662 MB/s
Iter 5 ( 3.764us): Send Speed 1166.667 MB/s ... Rcv Speed 42.467 MB/s
Iter 6 ( -4.404us): Send Speed 1319.508 MB/s ... Rcv Speed 47.973 MB/s
Summary: total trans 7758 MB ± 1293.506 MB/s
Without cpu-affinity(RPS enabled):
./bench sockmap -c 2 -p 1 -a --rx-verdict-ingress --no-verify
Setting up benchmark 'sockmap'...
create socket fd c1:14 p1:15 c2:16 p2:17
Benchmark 'sockmap' started.
Iter 0 ( 28.925us): Send Speed 1630.357 MB/s ... Rcv Speed 850.960 MB/s
Iter 1 ( -2.042us): Send Speed 1644.564 MB/s ... Rcv Speed 822.478 MB/s
Iter 2 ( 0.754us): Send Speed 1644.297 MB/s ... Rcv Speed 850.787 MB/s
Iter 3 ( 0.159us): Send Speed 1644.429 MB/s ... Rcv Speed 850.198 MB/s
Iter 4 ( -2.898us): Send Speed 1646.924 MB/s ... Rcv Speed 830.867 MB/s
Iter 5 ( -0.210us): Send Speed 1649.410 MB/s ... Rcv Speed 824.246 MB/s
Iter 6 ( -1.448us): Send Speed 1650.723 MB/s ... Rcv Speed 808.256 MB/s
With cpu-affinity(RPS disabled):
./bench sockmap -c 2 -p 1 -a --rx-verdict-ingress --no-verify --cpu-affinity
Setting up benchmark 'sockmap'...
create socket fd c1:14 p1:15 c2:16 p2:17
Benchmark 'sockmap' started.
Iter 0 ( 36.051us): Send Speed 1883.437 MB/s ... Rcv Speed 1865.087 MB/s
Iter 1 ( 1.246us): Send Speed 1900.542 MB/s ... Rcv Speed 1761.737 MB/s
Iter 2 ( -8.595us): Send Speed 1883.128 MB/s ... Rcv Speed 1860.714 MB/s
Iter 3 ( 7.033us): Send Speed 1890.831 MB/s ... Rcv Speed 1806.684 MB/s
Iter 4 ( -8.397us): Send Speed 1884.700 MB/s ... Rcv Speed 1973.568 MB/s
Iter 5 ( -1.822us): Send Speed 1894.125 MB/s ... Rcv Speed 1775.046 MB/s
Iter 6 ( 4.936us): Send Speed 1877.597 MB/s ... Rcv Speed 1959.320 MB/s
Summary: total trans 11328 MB ± 1888.507 MB/s
Appendix
===
Through this optimization, we discovered that sk_mem_charge()
and sk_mem_uncharge() have concurrency issues. The performance improvement
brought by this optimization has made these concurrency issues more
evident.
This concurrency issue can cause the WARN_ON_ONCE(sk->sk_forward_alloc)
check to be triggered when the socket is released. Since this patch is a
feature-type patch and does not intend to fix this bug, I will provide
additional patches to fix this issue later.
Jiayuan Chen (3):
bpf, sockmap: Introduce a new kfunc for sockmap
bpf, sockmap: Affinitize workqueue to a specific CPU
selftest/bpf/benchs: Add cpu-affinity for sockmap bench
Documentation/bpf/map_sockmap.rst | 14 +++++++
include/linux/skmsg.h | 15 +++++++
kernel/bpf/btf.c | 3 ++
net/core/skmsg.c | 10 +++--
net/core/sock_map.c | 39 +++++++++++++++++++
.../selftests/bpf/benchs/bench_sockmap.c | 35 +++++++++++++++--
tools/testing/selftests/bpf/bpf_kfuncs.h | 6 +++
.../selftests/bpf/progs/bench_sockmap_prog.c | 7 ++++
8 files changed, 122 insertions(+), 7 deletions(-)
--
2.47.1
5 months, 4 weeks
- 3
- 8
[PATCH AUTOSEL 6.6 19/21] selftests/bpf: Mitigate sockmap_ktls disconnect_after_delete failure
by Sasha Levin
From: Ihor Solodrai <ihor.solodrai(a)linux.dev>
[ Upstream commit f2858f308131a09e33afb766cd70119b5b900569 ]
"sockmap_ktls disconnect_after_delete" test has been failing on BPF CI
after recent merges from netdev:
* https://github.com/kernel-patches/bpf/actions/runs/14458537639
* https://github.com/kernel-patches/bpf/actions/runs/14457178732
It happens because disconnect has been disabled for TLS [1], and it
renders the test case invalid.
Removing all the test code creates a conflict between bpf and
bpf-next, so for now only remove the offending assert [2].
The test will be removed later on bpf-next.
[1] https://lore.kernel.org/netdev/20250404180334.3224206-1-kuba@kernel.org/
[2] https://lore.kernel.org/bpf/cfc371285323e1a3f3b006bfcf74e6cf7ad65258@linux.…
Signed-off-by: Ihor Solodrai <ihor.solodrai(a)linux.dev>
Signed-off-by: Andrii Nakryiko <andrii(a)kernel.org>
Reviewed-by: Jiayuan Chen <jiayuan.chen(a)linux.dev>
Link: https://lore.kernel.org/bpf/20250416170246.2438524-1-ihor.solodrai@linux.dev
Signed-off-by: Alexei Starovoitov <ast(a)kernel.org>
Signed-off-by: Sasha Levin <sashal(a)kernel.org>
---
tools/testing/selftests/bpf/prog_tests/sockmap_ktls.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/tools/testing/selftests/bpf/prog_tests/sockmap_ktls.c b/tools/testing/selftests/bpf/prog_tests/sockmap_ktls.c
index 2d0796314862a..0a99fd404f6dc 100644
--- a/tools/testing/selftests/bpf/prog_tests/sockmap_ktls.c
+++ b/tools/testing/selftests/bpf/prog_tests/sockmap_ktls.c
@@ -68,7 +68,6 @@ static void test_sockmap_ktls_disconnect_after_delete(int family, int map)
goto close_cli;
err = disconnect(cli);
- ASSERT_OK(err, "disconnect");
close_cli:
close(cli);
--
2.39.5
5 months, 4 weeks
- 1
- 0
[PATCH AUTOSEL 6.12 33/37] selftests/bpf: Mitigate sockmap_ktls disconnect_after_delete failure
by Sasha Levin
From: Ihor Solodrai <ihor.solodrai(a)linux.dev>
[ Upstream commit f2858f308131a09e33afb766cd70119b5b900569 ]
"sockmap_ktls disconnect_after_delete" test has been failing on BPF CI
after recent merges from netdev:
* https://github.com/kernel-patches/bpf/actions/runs/14458537639
* https://github.com/kernel-patches/bpf/actions/runs/14457178732
It happens because disconnect has been disabled for TLS [1], and it
renders the test case invalid.
Removing all the test code creates a conflict between bpf and
bpf-next, so for now only remove the offending assert [2].
The test will be removed later on bpf-next.
[1] https://lore.kernel.org/netdev/20250404180334.3224206-1-kuba@kernel.org/
[2] https://lore.kernel.org/bpf/cfc371285323e1a3f3b006bfcf74e6cf7ad65258@linux.…
Signed-off-by: Ihor Solodrai <ihor.solodrai(a)linux.dev>
Signed-off-by: Andrii Nakryiko <andrii(a)kernel.org>
Reviewed-by: Jiayuan Chen <jiayuan.chen(a)linux.dev>
Link: https://lore.kernel.org/bpf/20250416170246.2438524-1-ihor.solodrai@linux.dev
Signed-off-by: Alexei Starovoitov <ast(a)kernel.org>
Signed-off-by: Sasha Levin <sashal(a)kernel.org>
---
tools/testing/selftests/bpf/prog_tests/sockmap_ktls.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/tools/testing/selftests/bpf/prog_tests/sockmap_ktls.c b/tools/testing/selftests/bpf/prog_tests/sockmap_ktls.c
index 2d0796314862a..0a99fd404f6dc 100644
--- a/tools/testing/selftests/bpf/prog_tests/sockmap_ktls.c
+++ b/tools/testing/selftests/bpf/prog_tests/sockmap_ktls.c
@@ -68,7 +68,6 @@ static void test_sockmap_ktls_disconnect_after_delete(int family, int map)
goto close_cli;
err = disconnect(cli);
- ASSERT_OK(err, "disconnect");
close_cli:
close(cli);
--
2.39.5
5 months, 4 weeks
- 1
- 0
[PATCH AUTOSEL 6.14 34/39] selftests/bpf: Mitigate sockmap_ktls disconnect_after_delete failure
by Sasha Levin
From: Ihor Solodrai <ihor.solodrai(a)linux.dev>
[ Upstream commit f2858f308131a09e33afb766cd70119b5b900569 ]
"sockmap_ktls disconnect_after_delete" test has been failing on BPF CI
after recent merges from netdev:
* https://github.com/kernel-patches/bpf/actions/runs/14458537639
* https://github.com/kernel-patches/bpf/actions/runs/14457178732
It happens because disconnect has been disabled for TLS [1], and it
renders the test case invalid.
Removing all the test code creates a conflict between bpf and
bpf-next, so for now only remove the offending assert [2].
The test will be removed later on bpf-next.
[1] https://lore.kernel.org/netdev/20250404180334.3224206-1-kuba@kernel.org/
[2] https://lore.kernel.org/bpf/cfc371285323e1a3f3b006bfcf74e6cf7ad65258@linux.…
Signed-off-by: Ihor Solodrai <ihor.solodrai(a)linux.dev>
Signed-off-by: Andrii Nakryiko <andrii(a)kernel.org>
Reviewed-by: Jiayuan Chen <jiayuan.chen(a)linux.dev>
Link: https://lore.kernel.org/bpf/20250416170246.2438524-1-ihor.solodrai@linux.dev
Signed-off-by: Alexei Starovoitov <ast(a)kernel.org>
Signed-off-by: Sasha Levin <sashal(a)kernel.org>
---
tools/testing/selftests/bpf/prog_tests/sockmap_ktls.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/tools/testing/selftests/bpf/prog_tests/sockmap_ktls.c b/tools/testing/selftests/bpf/prog_tests/sockmap_ktls.c
index 2d0796314862a..0a99fd404f6dc 100644
--- a/tools/testing/selftests/bpf/prog_tests/sockmap_ktls.c
+++ b/tools/testing/selftests/bpf/prog_tests/sockmap_ktls.c
@@ -68,7 +68,6 @@ static void test_sockmap_ktls_disconnect_after_delete(int family, int map)
goto close_cli;
err = disconnect(cli);
- ASSERT_OK(err, "disconnect");
close_cli:
close(cli);
--
2.39.5
5 months, 4 weeks
- 1
- 0
[PATCH net 0/4] Fix Felix DSA taprio gates after clock jump
by Vladimir Oltean
Richie Pearn presented a reproducible situation where traffic would get
blocked on the NXP LS1028A switch if a certain taprio schedule was
applied, and stepping the PTP clock would take place. The latter event
is an expected initial occurrence, but also at runtime, for example when
transitioning from one grandmaster to another.
The issue is completely described in patch 1/4, which also contains
the fix, but it has left me with some doubts regarding the need for
vsc9959_tas_clock_adjust() in general.
In order to prove to myself that vsc9959_tas_clock_adjust() is needed in
general, I have written a selftest for the tc-taprio data path in patch
4/4. On the LS1028A, we can clearly see the following failures without
that function:
INFO: Forcing a backward clock jump
TEST: ping [FAIL]
INFO: Setting up taprio after PTP
TEST: In band with gate [FAIL]
Reception of 100 packets failed
TEST: Out of band with gate [FAIL]
Reception of 100 packets failed
As for testing my fix from patch 1/4, that was quite a bit more complex
to do automatically. In fact, I couldn't find any other schedule that
would fail to be updated by vsc9959_tas_clock_adjust() as cleanly as
the schedule from Richie, so I've added that specific schedule as the
test_clock_jump_backward() test.
The test ordering is also (unfortunately) very strategic. Running the
selftest to the end dirties the GCL RAM, and when running
test_clock_jump_backward() once again, the GCL entries won't be all
zeroes as they were the first time around. They will contain bits and
pieces of old schedules, making it very challenging to make it fail.
Thus, test_clock_jump_backward() is the first in the test suite, and
without patch 1/4, it is only supposed to fail the _first_ time when
running after a clean boot.
Vladimir Oltean (4):
net: dsa: felix: fix broken taprio gate states after clock jump
selftests: net: tsn_lib: create common helper for counting received
packets
selftests: net: tsn_lib: add window_size argument to isochron_do()
selftests: net: tc_taprio: new test
drivers/net/dsa/ocelot/felix_vsc9959.c | 5 +-
.../selftests/drivers/net/dsa/tc_taprio.sh | 1 +
.../selftests/drivers/net/ocelot/psfp.sh | 8 +-
.../selftests/net/forwarding/tc_taprio.sh | 421 ++++++++++++++++++
.../selftests/net/forwarding/tsn_lib.sh | 26 ++
5 files changed, 454 insertions(+), 7 deletions(-)
create mode 120000 tools/testing/selftests/drivers/net/dsa/tc_taprio.sh
create mode 100755 tools/testing/selftests/net/forwarding/tc_taprio.sh
--
2.43.0
5 months, 4 weeks
- 2
- 5
[PATCH bpf-next] selftests/bpf: Fix compilation errors
by Feng Yang
From: Feng Yang <yangfeng(a)kylinos.cn>
If the CONFIG_NET_SCH_BPF configuration is not enabled,
the BPF test compilation will report the following error:
In file included from progs/bpf_qdisc_fq.c:39:
progs/bpf_qdisc_common.h:17:51: error: declaration of 'struct bpf_sk_buff_ptr' will not be visible outside of this function [-Werror,-Wvisibility]
17 | void bpf_qdisc_skb_drop(struct sk_buff *p, struct bpf_sk_buff_ptr *to_free) __ksym;
| ^
progs/bpf_qdisc_fq.c:309:14: error: declaration of 'struct bpf_sk_buff_ptr' will not be visible outside of this function [-Werror,-Wvisibility]
309 | struct bpf_sk_buff_ptr *to_free)
| ^
progs/bpf_qdisc_fq.c:309:14: error: declaration of 'struct bpf_sk_buff_ptr' will not be visible outside of this function [-Werror,-Wvisibility]
progs/bpf_qdisc_fq.c:308:5: error: conflicting types for '____bpf_fq_enqueue'
Fixes: 11c701639ba9 ("selftests/bpf: Add a basic fifo qdisc test")
Signed-off-by: Feng Yang <yangfeng(a)kylinos.cn>
---
tools/testing/selftests/bpf/progs/bpf_qdisc_common.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/tools/testing/selftests/bpf/progs/bpf_qdisc_common.h b/tools/testing/selftests/bpf/progs/bpf_qdisc_common.h
index 65a2c561c0bb..7e7f2fe04f22 100644
--- a/tools/testing/selftests/bpf/progs/bpf_qdisc_common.h
+++ b/tools/testing/selftests/bpf/progs/bpf_qdisc_common.h
@@ -12,6 +12,8 @@
#define private(name) SEC(".data." #name) __hidden __attribute__((aligned(8)))
+struct bpf_sk_buff_ptr;
+
u32 bpf_skb_get_hash(struct sk_buff *p) __ksym;
void bpf_kfree_skb(struct sk_buff *p) __ksym;
void bpf_qdisc_skb_drop(struct sk_buff *p, struct bpf_sk_buff_ptr *to_free) __ksym;
--
2.43.0
5 months, 4 weeks
- 2
- 1
[PATCH] selftests/bpf: Fix kmem_cache iterator draining
by T.J. Mercier
The closing parentheses around the read syscall is misplaced, causing
single byte reads from the iterator instead of buf sized reads. While
the end result is the same, many more read calls than necessary are
performed.
$ tools/testing/selftests/bpf/vmtest.sh "./test_progs -t kmem_cache_iter"
145/1 kmem_cache_iter/check_task_struct:OK
145/2 kmem_cache_iter/check_slabinfo:OK
145/3 kmem_cache_iter/open_coded_iter:OK
145 kmem_cache_iter:OK
Summary: 1/3 PASSED, 0 SKIPPED, 0 FAILED
Fixes: a496d0cdc84d ("selftests/bpf: Add a test for kmem_cache_iter")
Signed-off-by: T.J. Mercier <tjmercier(a)google.com>
---
tools/testing/selftests/bpf/prog_tests/kmem_cache_iter.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/testing/selftests/bpf/prog_tests/kmem_cache_iter.c b/tools/testing/selftests/bpf/prog_tests/kmem_cache_iter.c
index 8e13a3416a21..1de14b111931 100644
--- a/tools/testing/selftests/bpf/prog_tests/kmem_cache_iter.c
+++ b/tools/testing/selftests/bpf/prog_tests/kmem_cache_iter.c
@@ -104,7 +104,7 @@ void test_kmem_cache_iter(void)
goto destroy;
memset(buf, 0, sizeof(buf));
- while (read(iter_fd, buf, sizeof(buf) > 0)) {
+ while (read(iter_fd, buf, sizeof(buf)) > 0) {
/* Read out all contents */
printf("%s", buf);
}
base-commit: b4432656b36e5cc1d50a1f2dc15357543add530e
--
2.49.0.906.g1f30a19c02-goog
5 months, 4 weeks
- 4
- 4
[PATCH net-next] selftests: net: exit cleanly on SIGTERM / timeout
by Jakub Kicinski
ksft runner sends 2 SIGTERMs in a row if a test runs out of time.
Handle this in a similar way we handle SIGINT - cleanup and stop
running further tests.
Because we get 2 signals we need a bit of logic to ignore
the subsequent one, they come immediately one after the other
(due to commit 9616cb34b08e ("kselftest/runner.sh: Propagate SIGTERM
to runner child")).
This change makes sure we run cleanup (scheduled defer()s)
and also print a stack trace on SIGTERM, which doesn't happen
by default. Tests occasionally hang in NIPA and it's impossible
to tell what they are waiting from or doing.
Signed-off-by: Jakub Kicinski <kuba(a)kernel.org>
---
CC: petrm(a)nvidia.com
CC: willemb(a)google.com
CC: sdf(a)fomichev.me
CC: linux-kselftest(a)vger.kernel.org
---
tools/testing/selftests/net/lib/py/ksft.py | 27 +++++++++++++++++++++-
1 file changed, 26 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/net/lib/py/ksft.py b/tools/testing/selftests/net/lib/py/ksft.py
index 3cfad0fd4570..73710634d457 100644
--- a/tools/testing/selftests/net/lib/py/ksft.py
+++ b/tools/testing/selftests/net/lib/py/ksft.py
@@ -3,6 +3,7 @@
import builtins
import functools
import inspect
+import signal
import sys
import time
import traceback
@@ -26,6 +27,10 @@ KSFT_DISRUPTIVE = True
pass
+class KsftTerminate(KeyboardInterrupt):
+ pass
+
+
def ksft_pr(*objs, **kwargs):
print("#", *objs, **kwargs)
@@ -193,6 +198,19 @@ KSFT_DISRUPTIVE = True
return env
+term_cnt = 0
+
+def _ksft_intr(signum, frame):
+ # ksft runner.sh sends 2 SIGTERMs in a row on a timeout
+ # if we don't ignore the second one it will stop us from handling cleanup
+ global term_cnt
+ term_cnt += 1
+ if term_cnt == 1:
+ raise KsftTerminate()
+ else:
+ ksft_pr(f"Ignoring SIGTERM (cnt: {term_cnt}), already exiting...")
+
+
def ksft_run(cases=None, globs=None, case_pfx=None, args=()):
cases = cases or []
@@ -205,6 +223,10 @@ KSFT_DISRUPTIVE = True
cases.append(value)
break
+ global term_cnt
+ term_cnt = 0
+ prev_sigterm = signal.signal(signal.SIGTERM, _ksft_intr)
+
totals = {"pass": 0, "fail": 0, "skip": 0, "xfail": 0}
print("TAP version 13")
@@ -229,11 +251,12 @@ KSFT_DISRUPTIVE = True
cnt_key = 'xfail'
except BaseException as e:
stop |= isinstance(e, KeyboardInterrupt)
+ stop |= isinstance(e, KsftTerminate)
tb = traceback.format_exc()
for line in tb.strip().split('\n'):
ksft_pr("Exception|", line)
if stop:
- ksft_pr("Stopping tests due to KeyboardInterrupt.")
+ ksft_pr(f"Stopping tests due to {type(e).__name__}.")
KSFT_RESULT = False
cnt_key = 'fail'
@@ -248,6 +271,8 @@ KSFT_DISRUPTIVE = True
if stop:
break
+ signal.signal(signal.SIGTERM, prev_sigterm)
+
print(
f"# Totals: pass:{totals['pass']} fail:{totals['fail']} xfail:{totals['xfail']} xpass:0 skip:{totals['skip']} error:0"
)
--
2.49.0
5 months, 4 weeks
- 3
- 5
[PATCH v2 0/6] Add support for FEAT_{LS64, LS64_V} and related tests
by Yicong Yang
From: Yicong Yang <yangyicong(a)hisilicon.com>
Armv8.7 introduces single-copy atomic 64-byte loads and stores
instructions and its variants named under FEAT_{LS64, LS64_V}.
Add support for Armv8.7 FEAT_{LS64, LS64_V}:
- Add identifying and enabling in the cpufeature list
- Expose the support of these features to userspace through HWCAP3
and cpuinfo
- Add related hwcap test
- Handle the trap of unsupported memory (normal/uncacheable) access in a VM
A real scenario for this feature is that the userspace driver can make use of
this to implement direct WQE (workqueue entry) - a mechanism to fill WQE
directly into the hardware.
This patchset also complement with Marc's patchset v2[1] for handling LS64*
trapped if not advertised for a VM.
[1] https://lore.kernel.org/linux-arm-kernel/20250310122505.2857610-1-maz@kerne…
Tested with updated hwcap test:
On host:
root@localhost:/tmp# dmesg | grep "All CPU(s) started"
[ 0.504846] CPU: All CPU(s) started at EL2
root@localhost:/tmp# ./hwcap
[...]
# LS64 present
ok 217 cpuinfo_match_LS64
ok 218 sigill_LS64
ok 219 # SKIP sigbus_LS64
# LS64_V present
ok 220 cpuinfo_match_LS64_V
ok 221 sigill_LS64_V
ok 222 # SKIP sigbus_LS64_V
# 115 skipped test(s) detected. Consider enabling relevant config options to improve coverage.
# Totals: pass:107 fail:0 xfail:0 xpass:0 skip:115 error:0
On guest:
root@localhost:/# dmesg | grep "All CPU(s) started"
[ 0.205580] CPU: All CPU(s) started at EL1
root@localhost:/mnt# ./hwcap
[...]
# LS64 present
ok 217 cpuinfo_match_LS64
ok 218 sigill_LS64
ok 219 # SKIP sigbus_LS64
# LS64_V present
ok 220 cpuinfo_match_LS64_V
ok 221 sigill_LS64_V
ok 222 # SKIP sigbus_LS64_V
# 115 skipped test(s) detected. Consider enabling relevant config options to improve coverage.
# Totals: pass:107 fail:0 xfail:0 xpass:0 skip:115 error:0
Change since v1:
- Drop the suppport for LS64_ACCDATA
- handle the DABT of unsupported memory type after checking the memory attributes
Link: https://lore.kernel.org/linux-arm-kernel/20241202135504.14252-1-yangyicong@…
Yicong Yang (6):
arm64: Provide basic EL2 setup for FEAT_{LS64, LS64_V} usage at EL0/1
arm64: Add support for FEAT_{LS64, LS64_V}
KVM: arm64: Enable FEAT_{LS64, LS64_V} in the supported guest
kselftest/arm64: Add HWCAP test for FEAT_{LS64, LS64_V}
arm64: Add ESR.DFSC definition of unsupported exclusive or atomic
access
KVM: arm64: Handle DABT caused by LS64* instructions on unsupported
memory
Documentation/arch/arm64/booting.rst | 12 +++
Documentation/arch/arm64/elf_hwcaps.rst | 6 ++
arch/arm64/include/asm/el2_setup.h | 12 ++-
arch/arm64/include/asm/esr.h | 8 ++
arch/arm64/include/asm/hwcap.h | 2 +
arch/arm64/include/asm/kvm_emulate.h | 7 ++
arch/arm64/include/uapi/asm/hwcap.h | 2 +
arch/arm64/kernel/cpufeature.c | 51 +++++++++++++
arch/arm64/kernel/cpuinfo.c | 2 +
arch/arm64/kvm/inject_fault.c | 35 +++++++++
arch/arm64/kvm/mmu.c | 37 +++++++++-
arch/arm64/tools/cpucaps | 2 +
tools/testing/selftests/arm64/abi/hwcap.c | 90 +++++++++++++++++++++++
13 files changed, 264 insertions(+), 2 deletions(-)
--
2.24.0
5 months, 4 weeks
- 4
- 16
[PATCH 0/3] RISC-V KVM selftests improvements
by Atish Patra
This series improves the following tests.
1. Get-reg-list : Adds vector support
2. SBI PMU test : Distinguish between different types of illegal exception
The first patch is just helper patch that adds stval support during
exception handling.
Signed-off-by: Atish Patra <atishp(a)rivosinc.com>
---
Atish Patra (3):
KVM: riscv: selftests: Add stval to exception handling
KVM: riscv: selftests: Decode stval to identify exact exception type
KVM: riscv: selftests: Add vector extension tests
.../selftests/kvm/include/riscv/processor.h | 1 +
tools/testing/selftests/kvm/lib/riscv/handlers.S | 2 +
tools/testing/selftests/kvm/riscv/get-reg-list.c | 111 ++++++++++++++++++++-
tools/testing/selftests/kvm/riscv/sbi_pmu_test.c | 32 ++++++
4 files changed, 145 insertions(+), 1 deletion(-)
---
base-commit: b3f263a98d30fe2e33eefea297598c590ee3560e
change-id: 20250324-kvm_selftest_improve-9bedb9f0a6d3
--
Regards,
Atish patra
5 months, 4 weeks
- 4
- 14
[PATCH] kunit: executor: Remove const from kunit_filter_suites() allocation type
by Kees Cook
In preparation for making the kmalloc family of allocators type aware,
we need to make sure that the returned type from the allocation matches
the type of the variable being assigned. (Before, the allocator would
always return "void *", which can be implicitly cast to any pointer type.)
The assigned type is "struct kunit_suite **" but the returned type will
be "struct kunit_suite * const *". Since it isn't generally possible
to remove the const qualifier, adjust the allocation type to match
the assignment.
Signed-off-by: Kees Cook <kees(a)kernel.org>
---
Cc: Brendan Higgins <brendan.higgins(a)linux.dev>
Cc: David Gow <davidgow(a)google.com>
Cc: Rae Moar <rmoar(a)google.com>
Cc: <linux-kselftest(a)vger.kernel.org>
Cc: <kunit-dev(a)googlegroups.com>
---
lib/kunit/executor.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/lib/kunit/executor.c b/lib/kunit/executor.c
index 3f39955cb0f1..0061d4c7e351 100644
--- a/lib/kunit/executor.c
+++ b/lib/kunit/executor.c
@@ -177,7 +177,7 @@ kunit_filter_suites(const struct kunit_suite_set *suite_set,
const size_t max = suite_set->end - suite_set->start;
- copy = kcalloc(max, sizeof(*filtered.start), GFP_KERNEL);
+ copy = kcalloc(max, sizeof(*copy), GFP_KERNEL);
if (!copy) { /* won't be able to run anything, return an empty set */
return filtered;
}
--
2.34.1
5 months, 4 weeks
- 2
- 1
[PATCH] fix(script): improve safety and formatting for WRITES_STRICT restore
by Alexander Shatalin
From: Alexander Shatalin <sashatalin03(a)gmail.com>
This patch improves the safety when restoring WRITES_STRICT by ensuring:
- The variable is not empty (`-n`)
- The target file is writable (`-w`)
Also improves formatting by quoting variables and following shell best
practices.
Signed-off-by: Alexander Shatalin <sashatalin03(a)gmail.com>
5 months, 4 weeks
- 2
- 1
[PATCH 1/2] selftests/mm: Fix build break when compiling pkey_util.c
by Nysal Jan K.A.
From: Madhavan Srinivasan <maddy(a)linux.ibm.com>
Commit 50910acd6f615 ("selftests/mm: use sys_pkey helpers consistently")
added a pkey_util.c to refactor some of the protection_keys functions accessible
by other tests. But this broken the build in powerpc in two ways,
pkey-powerpc.h: In function ‘arch_is_powervm’:
pkey-powerpc.h:73:21: error: storage size of ‘buf’ isn’t known
73 | struct stat buf;
| ^~~
pkey-powerpc.h:75:14: error: implicit declaration of function ‘stat’; did you mean ‘strcat’? [-Wimplicit-function-declaration]
75 | if ((stat("/sys/firmware/devicetree/base/ibm,partition-name", &buf) == 0) &&
| ^~~~
| strcat
Since pkey_util.c includes pkeys-helper.h, which in turn includes pkeys-powerpc.h,
stat.h including is missing for "struct stat". This is fixed by adding "sys/stat.h"
in pkeys-powerpc.h
Secondly,
pkey-powerpc.h:55:18: warning: format ‘%llx’ expects argument of type ‘long long unsigned int’, but argument 3 has type ‘u64’ {aka ‘long unsigned int’} [-Wformat=]
55 | dprintf4("%s() changing %016llx to %016llx\n",
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
56 | __func__, __read_pkey_reg(), pkey_reg);
| ~~~~~~~~~~~~~~~~~
| |
| u64 {aka long unsigned int}
pkey-helpers.h:63:32: note: in definition of macro ‘dprintf_level’
63 | sigsafe_printf(args); \
| ^~~~
These format specifier related warning are removed by adding
"__SANE_USERSPACE_TYPES__" to pkeys_utils.c.
Fixes: 50910acd6f615 ("selftests/mm: use sys_pkey helpers consistently")
Signed-off-by: Madhavan Srinivasan <maddy(a)linux.ibm.com>
Signed-off-by: Nysal Jan K.A. <nysal(a)linux.ibm.com>
---
tools/testing/selftests/mm/pkey-powerpc.h | 2 ++
tools/testing/selftests/mm/pkey_util.c | 1 +
2 files changed, 3 insertions(+)
diff --git a/tools/testing/selftests/mm/pkey-powerpc.h b/tools/testing/selftests/mm/pkey-powerpc.h
index 1bad310d282a..d8ec906b8120 100644
--- a/tools/testing/selftests/mm/pkey-powerpc.h
+++ b/tools/testing/selftests/mm/pkey-powerpc.h
@@ -3,6 +3,8 @@
#ifndef _PKEYS_POWERPC_H
#define _PKEYS_POWERPC_H
+#include <sys/stat.h>
+
#ifndef SYS_pkey_alloc
# define SYS_pkey_alloc 384
# define SYS_pkey_free 385
diff --git a/tools/testing/selftests/mm/pkey_util.c b/tools/testing/selftests/mm/pkey_util.c
index ca4ad0d44ab2..255b332f7a08 100644
--- a/tools/testing/selftests/mm/pkey_util.c
+++ b/tools/testing/selftests/mm/pkey_util.c
@@ -1,4 +1,5 @@
// SPDX-License-Identifier: GPL-2.0-only
+#define __SANE_USERSPACE_TYPES__
#include <sys/syscall.h>
#include <unistd.h>
--
2.47.0
5 months, 4 weeks
- 3
- 4
[PATCH v2 00/15] tools/nolibc: various new functions
by Thomas Weißschuh
A few functions used by different selftests.
Adding them now avoids later conflicts between different selftest serieses.
Also add full support for nolibc-test.c on riscv32.
All unsupported syscalls have been replaced.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh(a)linutronix.de>
---
Changes in v2:
- Rebase onto latest nolibc next branch
- Move #include "nolibc.h" to the top of the headers
- Include linux/random.h from sys/random.h
- Don't block on missing entropy in getrandom() selftest
- Also test negative result of difftime()
- Simplify fopen()
- Link to v1: https://lore.kernel.org/r/20250423-nolibc-misc-v1-0-a925bf40297b@linutronix…
---
Thomas Weißschuh (15):
tools/nolibc: add strstr()
tools/nolibc: add %m printf format
tools/nolibc: add more stat() variants
tools/nolibc: add mremap()
tools/nolibc: add getrandom()
tools/nolibc: add abs() and friends
tools/nolibc: add support for access() and faccessat()
tools/nolibc: add clock_getres(), clock_gettime() and clock_settime()
tools/nolibc: add timer functions
tools/nolibc: add timerfd functionality
tools/nolibc: add difftime()
tools/nolibc: add namespace functionality
tools/nolibc: add fopen()
tools/nolibc: fall back to sys_clock_gettime() in gettimeofday()
tools/nolibc: implement wait() in terms of waitpid()
tools/include/nolibc/Makefile | 4 +
tools/include/nolibc/math.h | 31 ++++
tools/include/nolibc/nolibc.h | 4 +
tools/include/nolibc/sched.h | 50 +++++
tools/include/nolibc/stdio.h | 27 +++
tools/include/nolibc/stdlib.h | 18 ++
tools/include/nolibc/string.h | 20 ++
tools/include/nolibc/sys/mman.h | 19 ++
tools/include/nolibc/sys/random.h | 34 ++++
tools/include/nolibc/sys/stat.h | 25 ++-
tools/include/nolibc/sys/time.h | 15 +-
tools/include/nolibc/sys/timerfd.h | 87 +++++++++
tools/include/nolibc/sys/wait.h | 12 +-
tools/include/nolibc/time.h | 185 ++++++++++++++++++
tools/include/nolibc/types.h | 3 +
tools/include/nolibc/unistd.h | 28 +++
tools/testing/selftests/nolibc/Makefile | 2 +
tools/testing/selftests/nolibc/nolibc-test.c | 268 ++++++++++++++++++++++++++-
18 files changed, 820 insertions(+), 12 deletions(-)
---
base-commit: 2051d3b830c0889ae55e37e9e8ff0d43a4acd482
change-id: 20250415-nolibc-misc-f2548ccc5ce1
Best regards,
--
Thomas Weißschuh <thomas.weissschuh(a)linutronix.de>
5 months, 4 weeks
- 1
- 15
[RFC PATCH 0/3] KVM: arm64: Don't claim MTE_ASYNC if not supported
by Ben Horgan
The ID_AA64PFR1_EL1.MTE_frac field is currently hidden from KVM.
However, when ID_AA64PFR1_EL1.MTE==2, ID_AA64PFR1_EL1.MTE_frac==0
indicates that MTE_ASYNC is supported. On a host with
ID_AA64PFR1_EL1.MTE==2 but without MTE_ASYNC support a guest with the
MTE capability enabled will incorrectly see MTE_ASYNC advertised as
supported. This series fixes that.
This was found by inspection and the current behaviour is not known to
break anything. Linux doesn't check MTE_frac, and wrongly, assumes
MTE async faults can be generated whenever MTE is supported. This is
a separate problem and not addressed here.
I am looking for feedback on whether this change is valuable or
otherwise.
Ben Horgan (3):
arm64/sysreg: Expose MTE_frac so that it is visible to KVM
KVM: arm64: Make MTE_frac masking conditional on MTE capability
KVM: selftests: Confirm exposing MTE_frac does not break migration
arch/arm64/kernel/cpufeature.c | 1 +
arch/arm64/kvm/sys_regs.c | 26 ++++++-
.../testing/selftests/kvm/arm64/set_id_regs.c | 77 ++++++++++++++++++-
3 files changed, 101 insertions(+), 3 deletions(-)
base-commit: 8ffd015db85fea3e15a77027fda6c02ced4d2444
--
2.43.0
5 months, 4 weeks
- 2
- 5
[PATCH 00/15] tools/nolibc: various new functions
by Thomas Weißschuh
A few functions used by different selftests.
Adding them now avoids later conflicts between different selftest serieses.
Also add full support for nolibc-test.c on riscv32.
All unsupported syscalls have been replaced.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh(a)linutronix.de>
---
Thomas Weißschuh (15):
tools/nolibc: add strstr()
tools/nolibc: add %m printf format
tools/nolibc: add more stat() variants
tools/nolibc: add mremap()
tools/nolibc: add getrandom()
tools/nolibc: add abs() and friends
tools/nolibc: add support for access() and faccessat()
tools/nolibc: add clock_getres(), clock_gettime() and clock_settime()
tools/nolibc: add timer functions
tools/nolibc: add timerfd functionality
tools/nolibc: add difftime()
tools/nolibc: add namespace functionality
tools/nolibc: add fopen()
tools/nolibc: implement fall back to sys_clock_gettime() in gettimeofday()
tools/nolibc: implement wait() in terms of waitpid()
tools/include/nolibc/Makefile | 4 +
tools/include/nolibc/math.h | 31 ++++
tools/include/nolibc/nolibc.h | 4 +
tools/include/nolibc/sched.h | 50 ++++++
tools/include/nolibc/stdio.h | 34 ++++
tools/include/nolibc/stdlib.h | 18 ++
tools/include/nolibc/string.h | 20 +++
tools/include/nolibc/sys/mman.h | 19 ++
tools/include/nolibc/sys/random.h | 32 ++++
tools/include/nolibc/sys/stat.h | 25 ++-
tools/include/nolibc/sys/time.h | 15 +-
tools/include/nolibc/sys/timerfd.h | 87 +++++++++
tools/include/nolibc/sys/wait.h | 12 +-
tools/include/nolibc/time.h | 185 +++++++++++++++++++
tools/include/nolibc/types.h | 3 +
tools/include/nolibc/unistd.h | 28 +++
tools/testing/selftests/nolibc/Makefile | 2 +
tools/testing/selftests/nolibc/nolibc-test.c | 254 ++++++++++++++++++++++++++-
18 files changed, 811 insertions(+), 12 deletions(-)
---
base-commit: e90ce42e81381665dbcedc5fa12e74759ee89639
change-id: 20250415-nolibc-misc-f2548ccc5ce1
Best regards,
--
Thomas Weißschuh <thomas.weissschuh(a)linutronix.de>
5 months, 4 weeks
- 2
- 23
Support for .kernelci.yaml file for in-tree configuration
by Krzysztof Wilczyński
Hello everyone,
A heads up!
Work on moving some aspects of the KernelCI configuration into an in-tree
(or per-project, if you wish) file called ".kernelci.yaml" has started and
is currently in the early design and implementation stage.
This is why we need your feedback to ensure that the feature implementation
moves in the right direction and will meet the user's needs.
Please have a look at the following GitHub issue:
https://github.com/kernelci/kernelci-pipeline/issues/1126
The linked issue is where anyone interested in this feature can get
involved to discuss implementation details, ask questions, etc. You can,
of course, ask questions here, too.
This new feature will eventually pave the way for the introduction of
a push model to KernelCI, along with the pull model we currently have,
allowing for the integration of different Git hosting platforms, such as
GitHub, GitLab, etc., where events sent to us from these platforms will
trigger an appropriate behaviour on the KernelCI's side.
However, this new functionality will be added as a mid-term deliverable,
where the ability to configure KernelCI via the ".kernelci.yaml" file is
one of the crucial dependencies.
Please don't hesitate to get involved and provide feedback.
Thank you!
On behalf of the KernelCI maintainers,
Krzysztof
5 months, 4 weeks
- 1
- 0
[PATCH 0/2] Fix compile-time and run-time issues for pid_namespace
by Tiezhu Yang
Tiezhu Yang (2):
selftests: pid_namespace: Include sys/mount.h
selftests: pid_namespace: Skip tests if not root
tools/testing/selftests/pid_namespace/pid_max.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
--
2.42.0
5 months, 4 weeks
- 1
- 2
[PATCH] selftests/mm: use long for dwRegionSize
by Siddarth G
Change the type of 'dwRegionSize' in wp_init() and wp_free()
from int to long to match callers that pass long or
unsigned long long values.
wp_addr_range function is left unchanged because it passes
'dwRegionSize' parameter directly to pagemap_ioctl, which expects
an int.
Signed-off-by: Siddarth G <siddarthsgml(a)gmail.com>
---
tools/testing/selftests/mm/pagemap_ioctl.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/mm/pagemap_ioctl.c b/tools/testing/selftests/mm/pagemap_ioctl.c
index 57b4bba2b45f..5773666f07ea 100644
--- a/tools/testing/selftests/mm/pagemap_ioctl.c
+++ b/tools/testing/selftests/mm/pagemap_ioctl.c
@@ -112,7 +112,7 @@ int init_uffd(void)
return 0;
}
-int wp_init(void *lpBaseAddress, int dwRegionSize)
+int wp_init(void *lpBaseAddress, long dwRegionSize)
{
struct uffdio_register uffdio_register;
struct uffdio_writeprotect wp;
@@ -136,7 +136,7 @@ int wp_init(void *lpBaseAddress, int dwRegionSize)
return 0;
}
-int wp_free(void *lpBaseAddress, int dwRegionSize)
+int wp_free(void *lpBaseAddress, long dwRegionSize)
{
struct uffdio_register uffdio_register;
--
2.43.0
6 months
- 2
- 1
[PATCH] kunit: fix longest symbol length test
by Sergio González Collado
The kunit test that checks the longests symbol length [1], has triggered
warnings in some CI pilelines when symbol prefixes are used [2]. The test
is adjusted to depend on !CONFIG_PREFIX_SYMBOLS as sujested in [3].
[1] https://lore.kernel.org/rust-for-linux/CABVgOSm=5Q0fM6neBhxSbOUHBgNzmwf2V22…
[2] https://lore.kernel.org/all/20250328112156.2614513-1-arnd@kernel.org/T/#u
[3] https://lore.kernel.org/all/ycgbf7jcq7nc62ndqiynogt6hkabgl3hld4uyelgo7rksyl…
Fixes: c104c16073b7 ("Kunit to check the longest symbol length")
Signed-off-by: Sergio González Collado <sergio.collado(a)gmail.com>
---
lib/Kconfig.debug | 2 +-
lib/tests/longest_symbol_kunit.c | 3 +--
2 files changed, 2 insertions(+), 3 deletions(-)
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index f9051ab610d5..6937dedce04d 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -2885,7 +2885,7 @@ config FORTIFY_KUNIT_TEST
config LONGEST_SYM_KUNIT_TEST
tristate "Test the longest symbol possible" if !KUNIT_ALL_TESTS
- depends on KUNIT && KPROBES
+ depends on KUNIT && KPROBES && !CONFIG_PREFIX_SYMBOLS
default KUNIT_ALL_TESTS
help
Tests the longest symbol possible
diff --git a/lib/tests/longest_symbol_kunit.c b/lib/tests/longest_symbol_kunit.c
index e3c28ff1807f..b183fb92d1b2 100644
--- a/lib/tests/longest_symbol_kunit.c
+++ b/lib/tests/longest_symbol_kunit.c
@@ -3,8 +3,7 @@
* Test the longest symbol length. Execute with:
* ./tools/testing/kunit/kunit.py run longest-symbol
* --arch=x86_64 --kconfig_add CONFIG_KPROBES=y --kconfig_add CONFIG_MODULES=y
- * --kconfig_add CONFIG_RETPOLINE=n --kconfig_add CONFIG_CFI_CLANG=n
- * --kconfig_add CONFIG_MITIGATION_RETPOLINE=n
+ * --kconfig_add CONFIG_CPU_MITIGATIONS=n
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
base-commit: f1a3944c860b0615d0513110d8cf62bb94adbb41
--
2.39.2
6 months
- 2
- 1
[PATCH] selftests/seccomp: fix syscall_restart test for arm compat
by FirstName LastName
From: Neill Kapron <nkapron(a)google.com>
The inconsistencies in the systcall ABI between arm and arm-compat can
can cause a failure in the syscall_restart test due to the logic
attempting to work around the differences. The 'machine' field for an
ARM64 device running in compat mode can report 'armv8l' or 'armv8b'
which matches with the string 'arm' when only examining the first three
characters of the string.
This change adds additional validation to the workaround logic to make
sure we only take the arm path when running natively, not in arm-compat.
Fixes: 256d0afb11d6 ("selftests/seccomp: build and pass on arm64")
Signed-off-by: Neill Kapron <nkapron(a)google.com>
---
tools/testing/selftests/seccomp/seccomp_bpf.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/seccomp/seccomp_bpf.c b/tools/testing/selftests/seccomp/seccomp_bpf.c
index b2f76a52215a..53bf6a9c801f 100644
--- a/tools/testing/selftests/seccomp/seccomp_bpf.c
+++ b/tools/testing/selftests/seccomp/seccomp_bpf.c
@@ -3166,12 +3166,15 @@ TEST(syscall_restart)
ret = get_syscall(_metadata, child_pid);
#if defined(__arm__)
/*
- * FIXME:
* - native ARM registers do NOT expose true syscall.
* - compat ARM registers on ARM64 DO expose true syscall.
+ * - values of utsbuf.machine include 'armv8l' or 'armb8b'
+ * for ARM64 running in compat mode.
*/
ASSERT_EQ(0, uname(&utsbuf));
- if (strncmp(utsbuf.machine, "arm", 3) == 0) {
+ if ((strncmp(utsbuf.machine, "arm", 3) == 0) &&
+ (strncmp(utsbuf.machine, "armv8l", 6) != 0) &&
+ (strncmp(utsbuf.machine, "armv8b", 6) != 0)) {
EXPECT_EQ(__NR_nanosleep, ret);
} else
#endif
--
2.49.0.850.g28803427d3-goog
6 months
- 1
- 0
[PATCH v10 0/5] KVM: selftests: Add LoongArch support
by Bibo Mao
This patchset adds KVM selftests for LoongArch system, currently only
some common test cases are supported and pass to run. These test cases
are listed as following:
coalesced_io_test
demand_paging_test
dirty_log_perf_test
dirty_log_test
guest_print_test
hardware_disable_test
kvm_binary_stats_test
kvm_create_max_vcpus
kvm_page_table_test
memslot_modification_stress_test
memslot_perf_test
set_memory_region_test
---
Changes in v10:
1. Add PS_64K and remove PS_8K in file include/loongarch/processor.h
2. Fix a typo issue in file lib/loongarch/processor.c
3. Update file MAINTAINERS about LoongArch KVM selftests
Changes in v9:
1. Add vm mode VM_MODE_P47V47_16K, LoongArch VM uses this mode by
default, rather than VM_MODE_P36V47_16K.
2. Refresh some spelling issues in changelog.
Changes in v8:
1. Porting patch based on the latest version.
2. For macro PC_OFFSET_EXREGS, offsetof() method is used for C header file,
still hardcoded definition for assemble language.
Changes in v7:
1. Refine code to add LoongArch support in test case
set_memory_region_test.
Changes in v6:
1. Refresh the patch based on latest kernel 6.8-rc1, add LoongArch
support about testcase set_memory_region_test.
2. Add hardware_disable_test test case.
3. Drop modification about macro DEFAULT_GUEST_TEST_MEM, it is problem
of LoongArch binutils, this issue is raised to LoongArch binutils owners.
Changes in v5:
1. In LoongArch kvm self tests, the DEFAULT_GUEST_TEST_MEM could be
0x130000000, it is different from the default value in memstress.h.
So we Move the definition of DEFAULT_GUEST_TEST_MEM into LoongArch
ucall.h, and add 'ifndef' condition for DEFAULT_GUEST_TEST_MEM
in memstress.h.
Changes in v4:
1. Remove the based-on flag, as the LoongArch KVM patch series
have been accepted by Linux kernel, so this can be applied directly
in kernel.
Changes in v3:
1. Improve implementation of LoongArch VM page walk.
2. Add exception handler for LoongArch.
3. Add dirty_log_test, dirty_log_perf_test, guest_print_test
test cases for LoongArch.
4. Add __ASSEMBLER__ macro to distinguish asm file and c file.
5. Move ucall_arch_do_ucall to the header file and make it as
static inline to avoid function calls.
6. Change the DEFAULT_GUEST_TEST_MEM base addr for LoongArch.
Changes in v2:
1. We should use ".balign 4096" to align the assemble code with 4K in
exception.S instead of "align 12".
2. LoongArch only supports 3 or 4 levels page tables, so we remove the
hanlders for 2-levels page table.
3. Remove the DEFAULT_LOONGARCH_GUEST_STACK_VADDR_MIN and use the common
DEFAULT_GUEST_STACK_VADDR_MIN to allocate stack memory in guest.
4. Reorganize the test cases supported by LoongArch.
5. Fix some code comments.
6. Add kvm_binary_stats_test test case into LoongArch KVM selftests.
---
Bibo Mao (5):
KVM: selftests: Add VM_MODE_P47V47_16K vm mode
KVM: selftests: Add KVM selftests header files for LoongArch
KVM: selftests: Add core KVM selftests support for LoongArch
KVM: selftests: Add ucall test support for LoongArch
KVM: selftests: Add test cases for LoongArch
MAINTAINERS | 2 +
tools/testing/selftests/kvm/Makefile | 2 +-
tools/testing/selftests/kvm/Makefile.kvm | 18 +
.../testing/selftests/kvm/include/kvm_util.h | 6 +
.../kvm/include/loongarch/kvm_util_arch.h | 7 +
.../kvm/include/loongarch/processor.h | 141 ++++++++
.../selftests/kvm/include/loongarch/ucall.h | 20 +
tools/testing/selftests/kvm/lib/kvm_util.c | 3 +
.../selftests/kvm/lib/loongarch/exception.S | 59 +++
.../selftests/kvm/lib/loongarch/processor.c | 342 ++++++++++++++++++
.../selftests/kvm/lib/loongarch/ucall.c | 38 ++
.../selftests/kvm/set_memory_region_test.c | 2 +-
12 files changed, 638 insertions(+), 2 deletions(-)
create mode 100644 tools/testing/selftests/kvm/include/loongarch/kvm_util_arch.h
create mode 100644 tools/testing/selftests/kvm/include/loongarch/processor.h
create mode 100644 tools/testing/selftests/kvm/include/loongarch/ucall.h
create mode 100644 tools/testing/selftests/kvm/lib/loongarch/exception.S
create mode 100644 tools/testing/selftests/kvm/lib/loongarch/processor.c
create mode 100644 tools/testing/selftests/kvm/lib/loongarch/ucall.c
base-commit: 9d7a0577c9db35c4cc52db90bc415ea248446472
--
2.39.3
6 months
- 3
- 7
[PATCH v6 iproute2-next 0/1] DUALPI2 iproute2 patch
by chia-yu.chang＠nokia-bell-labs.com
From: Chia-Yu Chang <chia-yu.chang(a)nokia-bell-labs.com>
Hello,
Please find DUALPI2 iproute2 patch v6.
v6 (26-Apr-25)
- Update JSON file output due to spec modifiocation in tc.yaml of net-next
v5 (25-Mar-25)
- Use matches() to replace current strcmp() (Stephen Hemminger <stephen(a)networkplumber.org>)
- Use general parse_percent() for handling scaled percentage values (Stephen Hemminger <stephen(a)networkplumber.org>)
- Add print function for JSON of dualpi2 stats (Stephen Hemminger <stephen(a)networkplumber.org>)
v4 (16-Mar-25)
- Add min_qlen_step to dualpi2 attribute as the minimum queue length in number of packets in the L-queue to start step amrking.
v3 (21-Feb-25)
- Add memlimit to dualpi2 attribute, and add memory_used, max_memory_used, memory_limit in dualpi2 stats (Dave Taht <dave.taht(a)gmail.com>)
- Update manual to align latest implementation and clarify the queue naming and default unit
- Use common "get_scaled_alpha_beta" and clean print_opt for Dualpi2
v2 (23-Oct-24)
- Rename get_float in dualpi2 to get_float_min_max in utils.c
- Move get_float from iplink_can.c in utils.c (Stephen Hemminger <stephen(a)networkplumber.org>)
- Add print function for JSON of dualpi2 (Stephen Hemminger <stephen(a)networkplumber.org>)
For more details of DualPI2, plesae refer IETF RFC9332
(https://datatracker.ietf.org/doc/html/rfc9332).
Best Regards,
Chia-Yu
Chia-Yu Chang (1):
tc: add dualpi2 scheduler module
bash-completion/tc | 11 +-
include/uapi/linux/pkt_sched.h | 39 +++
include/utils.h | 2 +
ip/iplink_can.c | 14 -
lib/utils.c | 30 ++
man/man8/tc-dualpi2.8 | 249 +++++++++++++++
tc/Makefile | 1 +
tc/q_dualpi2.c | 538 +++++++++++++++++++++++++++++++++
8 files changed, 869 insertions(+), 15 deletions(-)
create mode 100644 man/man8/tc-dualpi2.8
create mode 100644 tc/q_dualpi2.c
--
2.34.1
6 months
- 1
- 1
[PATCH net-next v12 0/9] Device memory TCP TX
by Mina Almasry
v12: https://lore.kernel.org/netdev/20250423031117.907681-1-almasrymina@google.c…
====
No changes in v12, just restored the selftests patch I accidentally dropped in
v11
v11: https://lore.kernel.org/netdev/20250423031117.907681-1-almasrymina@google.c…
====
Addressed a couple of nits and collected Acked-by from Harshitha
(thanks!)
v10: https://lore.kernel.org/netdev/20250417231540.2780723-1-almasrymina@google.…
====
Addressed comments following conversations with Pavel, Stan, and
Harshitha. Thank you guys for the reviews again. Overall minor changes:
Changelog:
- Check for !niov->pp in io_zcrx_recv_frag, just in case we end up with
a TX niov in that path (Pavel).
- Fix locking case in !netif_device_present (Jakub/Stan).
v9: https://lore.kernel.org/netdev/20250415224756.152002-1-almasrymina@google.c…
===
Changelog:
- Use priv->bindings list instead of sock_bindings_list. This was missed
during the rebase as the bindings have been updated to use
priv->bindings recently (thanks Stan!)
v8: https://lore.kernel.org/netdev/20250308214045.1160445-1-almasrymina@google.…
===
Only address minor comments on V7
Changelog:
- Use netdev locking instead of rtnl_locking to match rx path.
- Now that iouring zcrx is in net-next, use NET_IOV_IOURING instead of
NET_IOV_UNSPECIFIED.
- Post send binding to net_devmem_dmabuf_bindings after it's been fully
initialized (Stan).
v7: https://lore.kernel.org/netdev/20250227041209.2031104-1-almasrymina@google.…
===
Changelog:
- Check the dmabuf net_iov binding belongs to the device the TX is going
out on. (Jakub)
- Provide detailed inspection of callsites of
__skb_frag_ref/skb_page_unref in patch 2's changelog (Jakub)
v6: https://lore.kernel.org/netdev/20250222191517.743530-1-almasrymina@google.c…
===
v6 has no major changes. Addressed a few issues from Paolo and David,
and collected Acks from Stan. Thank you everyone for the review!
Changes:
- retain behavior to process MSG_FASTOPEN even if the provided cmsg is
invalid (Paolo).
- Rework the freeing of tx_vec slightly (it now has its own err label).
(Paolo).
- Squash the commit that makes dmabuf unbinding scheduled work into the
same one which implements the TX path so we don't run into future
errors on bisecting (Paolo).
- Fix/add comments to explain how dmabuf binding refcounting works
(David).
v5: https://lore.kernel.org/netdev/20250220020914.895431-1-almasrymina@google.c…
===
v5 has no major changes; it clears up the relatively minor issues
pointed out to in v4, and rebases the series on top of net-next to
resolve the conflict with a patch that raced to the tree. It also
collects the review tags from v4.
Changes:
- Rebase to net-next
- Fix issues in selftest (Stan).
- Address comments in the devmem and netmem driver docs (Stan and Bagas)
- Fix zerocopy_fill_skb_from_devmem return error code (Stan).
v4: https://lore.kernel.org/netdev/20250203223916.1064540-1-almasrymina@google.…
===
v4 mainly addresses the critical driver support issue surfaced in v3 by
Paolo and Stan. Drivers aiming to support netmem_tx should make sure not
to pass the netmem dma-addrs to the dma-mapping APIs, as these dma-addrs
may come from dma-bufs.
Additionally other feedback from v3 is addressed.
Major changes:
- Add helpers to handle netmem dma-addrs. Add GVE support for
netmem_tx.
- Fix binding->tx_vec not being freed on error paths during the
tx binding.
- Add a minimal devmem_tx test to devmem.py.
- Clean up everything obsolete from the cover letter (Paolo).
v3: https://patchwork.kernel.org/project/netdevbpf/list/?series=929401&state=*
===
Address minor comments from RFCv2 and fix a few build warnings and
ynl-regen issues. No major changes.
RFC v2: https://patchwork.kernel.org/project/netdevbpf/list/?series=920056&state=*
=======
RFC v2 addresses much of the feedback from RFC v1. I plan on sending
something close to this as net-next reopens, sending it slightly early
to get feedback if any.
Major changes:
--------------
- much improved UAPI as suggested by Stan. We now interpret the iov_base
of the passed in iov from userspace as the offset into the dmabuf to
send from. This removes the need to set iov.iov_base = NULL which may
be confusing to users, and enables us to send multiple iovs in the
same sendmsg() call. ncdevmem and the docs show a sample use of that.
- Removed the duplicate dmabuf iov_iter in binding->iov_iter. I think
this is good improvment as it was confusing to keep track of
2 iterators for the same sendmsg, and mistracking both iterators
caused a couple of bugs reported in the last iteration that are now
resolved with this streamlining.
- Improved test coverage in ncdevmem. Now multiple sendmsg() are tested,
and sending multiple iovs in the same sendmsg() is tested.
- Fixed issue where dmabuf unmapping was happening in invalid context
(Stan).
====================================================================
The TX path had been dropped from the Device Memory TCP patch series
post RFCv1 [1], to make that series slightly easier to review. This
series rebases the implementation of the TX path on top of the
net_iov/netmem framework agreed upon and merged. The motivation for
the feature is thoroughly described in the docs & cover letter of the
original proposal, so I don't repeat the lengthy descriptions here, but
they are available in [1].
Full outline on usage of the TX path is detailed in the documentation
included with this series.
Test example is available via the kselftest included in the series as well.
The series is relatively small, as the TX path for this feature largely
piggybacks on the existing MSG_ZEROCOPY implementation.
Patch Overview:
---------------
1. Documentation & tests to give high level overview of the feature
being added.
1. Add netmem refcounting needed for the TX path.
2. Devmem TX netlink API.
3. Devmem TX net stack implementation.
4. Make dma-buf unbinding scheduled work to handle TX cases where it gets
freed from contexts where we can't sleep.
5. Add devmem TX documentation.
6. Add scaffolding enabling driver support for netmem_tx. Add helpers, driver
feature flag, and docs to enable drivers to declare netmem_tx support.
7. Guard netmem_tx against being enabled against drivers that don't
support it.
8. Add devmem_tx selftests. Add TX path to ncdevmem and add a test to
devmem.py.
Testing:
--------
Testing is very similar to devmem TCP RX path. The ncdevmem test used
for the RX path is now augemented with client functionality to test TX
path.
* Test Setup:
Kernel: net-next with this RFC and memory provider API cherry-picked
locally.
Hardware: Google Cloud A3 VMs.
NIC: GVE with header split & RSS & flow steering support.
Performance results are not included with this version, unfortunately.
I'm having issues running the dma-buf exporter driver against the
upstream kernel on my test setup. The issues are specific to that
dma-buf exporter and do not affect this patch series. I plan to follow
up this series with perf fixes if the tests point to issues once they're
up and running.
Special thanks to Stan who took a stab at rebasing the TX implementation
on top of the netmem/net_iov framework merged. Parts of his proposal [2]
that are reused as-is are forked off into their own patches to give full
credit.
[1] https://lore.kernel.org/netdev/20240909054318.1809580-1-almasrymina@google.…
[2] https://lore.kernel.org/netdev/20240913150913.1280238-2-sdf@fomichev.me/T/#…
Cc: sdf(a)fomichev.me
Cc: asml.silence(a)gmail.com
Cc: dw(a)davidwei.uk
Cc: Jamal Hadi Salim <jhs(a)mojatatu.com>
Cc: Victor Nogueira <victor(a)mojatatu.com>
Cc: Pedro Tammela <pctammela(a)mojatatu.com>
Cc: Samiullah Khawaja <skhawaja(a)google.com>
Cc: Kuniyuki Iwashima <kuniyu(a)amazon.com>
Mina Almasry (8):
netmem: add niov->type attribute to distinguish different net_iov
types
net: add get_netmem/put_netmem support
net: devmem: Implement TX path
net: add devmem TCP TX documentation
net: enable driver support for netmem TX
gve: add netmem TX support to GVE DQO-RDA mode
net: check for driver support in netmem TX
selftests: ncdevmem: Implement devmem TCP TX
Stanislav Fomichev (1):
net: devmem: TCP tx netlink api
Documentation/netlink/specs/netdev.yaml | 12 +
Documentation/networking/devmem.rst | 150 ++++++++-
.../networking/net_cachelines/net_device.rst | 1 +
Documentation/networking/netdev-features.rst | 5 +
Documentation/networking/netmem.rst | 23 +-
drivers/net/ethernet/google/gve/gve_main.c | 3 +
drivers/net/ethernet/google/gve/gve_tx_dqo.c | 8 +-
include/linux/netdevice.h | 2 +
include/linux/skbuff.h | 17 +-
include/linux/skbuff_ref.h | 4 +-
include/net/netmem.h | 34 +-
include/net/sock.h | 1 +
include/uapi/linux/netdev.h | 1 +
io_uring/zcrx.c | 3 +-
net/core/datagram.c | 48 ++-
net/core/dev.c | 34 +-
net/core/devmem.c | 133 ++++++--
net/core/devmem.h | 83 ++++-
net/core/netdev-genl-gen.c | 13 +
net/core/netdev-genl-gen.h | 1 +
net/core/netdev-genl.c | 80 ++++-
net/core/skbuff.c | 48 ++-
net/core/sock.c | 6 +
net/ipv4/ip_output.c | 3 +-
net/ipv4/tcp.c | 50 ++-
net/ipv6/ip6_output.c | 3 +-
net/vmw_vsock/virtio_transport_common.c | 5 +-
tools/include/uapi/linux/netdev.h | 1 +
.../selftests/drivers/net/hw/devmem.py | 26 +-
.../selftests/drivers/net/hw/ncdevmem.c | 300 +++++++++++++++++-
30 files changed, 1010 insertions(+), 88 deletions(-)
base-commit: 4acf6d4f6afc3478753e49c495132619667549d9
--
2.49.0.850.g28803427d3-goog
6 months
- 2
- 11
Re: [PATCH bpf-next v2 06/11] bpf, arm64, powerpc: Change nospec to include v1 barrier
by Luis Gerhorst
kernel test robot <lkp(a)intel.com> writes:
> All errors (new ones prefixed by >>):
>
> arch/powerpc/net/bpf_jit_comp64.c: In function 'bpf_jit_build_body':
>>> arch/powerpc/net/bpf_jit_comp64.c:814:4: error: a label can only be part of a statement and a declaration is not a statement
> 814 | bool sync_emitted = false;
> | ^~~~
>>> arch/powerpc/net/bpf_jit_comp64.c:815:4: error: expected expression before 'bool'
> 815 | bool ori31_emitted = false;
> | ^~~~
>>> arch/powerpc/net/bpf_jit_comp64.c:833:6: error: 'ori31_emitted' undeclared (first use in this function)
> 833 | ori31_emitted = true;
> | ^~~~~~~~~~~~~
> arch/powerpc/net/bpf_jit_comp64.c:833:6: note: each undeclared identifier is reported only once for each function it appears in
Fixed this for v3. For the other archs, the patches also don't add
declarations in a switch/case.
I also checked that there are no new W=2 warnings for the touched C
files on x86 with the vmtest bpf config.
I have not checked that all files that include a touched header don't
have new warnings. When doing -j $(nproc) the diff does not work and
with -j 1 it takes forever (e.g., because bpf.h is touched). If you
think this is required just let me know (and if you have a tip on how to
do it more quickly that would be great too).
6 months
- 1
- 0
[PATCH v4 00/14] Add support for suppressing warning backtraces
by Alessandro Carminati
Some unit tests intentionally trigger warning backtraces by passing bad
parameters to kernel API functions. Such unit tests typically check the
return value from such calls, not the existence of the warning backtrace.
Such intentionally generated warning backtraces are neither desirable
nor useful for a number of reasons.
- They can result in overlooked real problems.
- A warning that suddenly starts to show up in unit tests needs to be
investigated and has to be marked to be ignored, for example by
adjusting filter scripts. Such filters are ad-hoc because there is
no real standard format for warnings. On top of that, such filter
scripts would require constant maintenance.
One option to address problem would be to add messages such as "expected
warning backtraces start / end here" to the kernel log. However, that
would again require filter scripts, it might result in missing real
problematic warning backtraces triggered while the test is running, and
the irrelevant backtrace(s) would still clog the kernel log.
Solve the problem by providing a means to identify and suppress specific
warning backtraces while executing test code. Support suppressing multiple
backtraces while at the same time limiting changes to generic code to the
absolute minimum. Architecture specific changes are kept at minimum by
retaining function names only if both CONFIG_DEBUG_BUGVERBOSE and
CONFIG_KUNIT are enabled.
The first patch of the series introduces the necessary infrastructure.
The second patch introduces support for counting suppressed backtraces.
This capability is used in patch three to implement unit tests.
Patch four documents the new API.
The next two patches add support for suppressing backtraces in drm_rect
and dev_addr_lists unit tests. These patches are intended to serve as
examples for the use of the functionality introduced with this series.
The remaining patches implement the necessary changes for all
architectures with GENERIC_BUG support.
With CONFIG_KUNIT enabled, image size increase with this series applied is
approximately 1%. The image size increase (and with it the functionality
introduced by this series) can be avoided by disabling
CONFIG_KUNIT_SUPPRESS_BACKTRACE.
This series is based on the RFC patch and subsequent discussion at
https://patchwork.kernel.org/project/linux-kselftest/patch/02546e59-1afe-4b…
and offers a more comprehensive solution of the problem discussed there.
Design note:
Function pointers are only added to the __bug_table section if both
CONFIG_KUNIT_SUPPRESS_BACKTRACE and CONFIG_DEBUG_BUGVERBOSE are enabled
to avoid image size increases if CONFIG_KUNIT is disabled. There would be
some benefits to adding those pointers all the time (reduced complexity,
ability to display function names in BUG/WARNING messages). That change,
if desired, can be made later.
Checkpatch note:
Remaining checkpatch errors and warnings were deliberately ignored.
Some are triggered by matching coding style or by comments interpreted
as code, others by assembler macros which are disliked by checkpatch.
Suggestions for improvements are welcome.
Changes since RFC:
- Introduced CONFIG_KUNIT_SUPPRESS_BACKTRACE
- Minor cleanups and bug fixes
- Added support for all affected architectures
- Added support for counting suppressed warnings
- Added unit tests using those counters
- Added patch to suppress warning backtraces in dev_addr_lists tests
Changes since v1:
- Rebased to v6.9-rc1
- Added Tested-by:, Acked-by:, and Reviewed-by: tags
[I retained those tags since there have been no functional changes]
- Introduced KUNIT_SUPPRESS_BACKTRACE configuration option, enabled by
default.
Changes since v2:
- Rebased to v6.9-rc2
- Added comments to drm warning suppression explaining why it is needed.
- Added patch to move conditional code in arch/sh/include/asm/bug.h
to avoid kerneldoc warning
- Added architecture maintainers to Cc: for architecture specific patches
- No functional changes
Changes since v3:
- Rebased to v6.14-rc6
- Dropped net: "kunit: Suppress lock warning noise at end of dev_addr_lists tests"
since 3db3b62955cd6d73afde05a17d7e8e106695c3b9
- Added __kunit_ and KUNIT_ prefixes.
- Tested on interessed architectures.
----
Guenter Roeck (14):
bug/kunit: Core support for suppressing warning backtraces
kunit: bug: Count suppressed warning backtraces
kunit: Add test cases for backtrace warning suppression
kunit: Add documentation for warning backtrace suppression API
drm: Suppress intentional warning backtraces in scaling unit tests
x86: Add support for suppressing warning backtraces
arm64: Add support for suppressing warning backtraces
loongarch: Add support for suppressing warning backtraces
parisc: Add support for suppressing warning backtraces
s390: Add support for suppressing warning backtraces
sh: Add support for suppressing warning backtraces
sh: Move defines needed for suppressing warning backtraces
riscv: Add support for suppressing warning backtraces
powerpc: Add support for suppressing warning backtraces
Documentation/dev-tools/kunit/usage.rst | 30 ++++++-
arch/arm64/include/asm/asm-bug.h | 27 ++++--
arch/arm64/include/asm/bug.h | 8 +-
arch/loongarch/include/asm/bug.h | 42 +++++++---
arch/parisc/include/asm/bug.h | 29 +++++--
arch/powerpc/include/asm/bug.h | 37 +++++++--
arch/riscv/include/asm/bug.h | 38 ++++++---
arch/s390/include/asm/bug.h | 17 +++-
arch/sh/include/asm/bug.h | 28 ++++++-
arch/x86/include/asm/bug.h | 21 +++--
drivers/gpu/drm/tests/drm_rect_test.c | 16 ++++
include/asm-generic/bug.h | 16 +++-
include/kunit/bug.h | 56 +++++++++++++
include/kunit/test.h | 1 +
include/linux/bug.h | 13 +++
lib/bug.c | 51 +++++++++++-
lib/kunit/Kconfig | 9 ++
lib/kunit/Makefile | 7 +-
lib/kunit/backtrace-suppression-test.c | 104 ++++++++++++++++++++++++
lib/kunit/bug.c | 42 ++++++++++
20 files changed, 519 insertions(+), 73 deletions(-)
create mode 100644 include/kunit/bug.h
create mode 100644 lib/kunit/backtrace-suppression-test.c
create mode 100644 lib/kunit/bug.c
--
2.34.1
6 months
- 15
- 44
[PATCH net 1/2] net: mscc: ocelot: delete PVID VLAN when readding it as non-PVID
by Vladimir Oltean
The following set of commands:
ip link add br0 type bridge vlan_filtering 1 # vlan_default_pvid 1 is implicit
ip link set swp0 master br0
bridge vlan add dev swp0 vid 1
should result in the dropping of untagged and 802.1p-tagged traffic, but
we see that it continues to be accepted. Whereas, had we deleted VID 1
instead, the aforementioned dropping would have worked
This is because the ANA_PORT_DROP_CFG update logic doesn't run, because
ocelot_vlan_add() only calls ocelot_port_set_pvid() if the new VLAN has
the BRIDGE_VLAN_INFO_PVID flag.
Similar to other drivers like mt7530_port_vlan_add() which handle this
case correctly, we need to test whether the VLAN we're changing used to
have the BRIDGE_VLAN_INFO_PVID flag, but lost it now. That amounts to a
PVID deletion and should be treated as such.
Regarding blame attribution: this never worked properly since the
introduction of bridge VLAN filtering in commit 7142529f1688 ("net:
mscc: ocelot: add VLAN filtering"). However, there was a significant
paradigm shift which aligned the ANA_PORT_DROP_CFG register with the
PVID concept rather than with the native VLAN concept, and that change
wasn't targeted for 'stable'. Realistically, that is as far as this fix
needs to be propagated to.
Fixes: be0576fed6d3 ("net: mscc: ocelot: move the logic to drop 802.1p traffic to the pvid deletion")
Signed-off-by: Vladimir Oltean <vladimir.oltean(a)nxp.com>
---
drivers/net/ethernet/mscc/ocelot.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/net/ethernet/mscc/ocelot.c b/drivers/net/ethernet/mscc/ocelot.c
index ef93df520887..08bee56aea35 100644
--- a/drivers/net/ethernet/mscc/ocelot.c
+++ b/drivers/net/ethernet/mscc/ocelot.c
@@ -830,6 +830,7 @@ EXPORT_SYMBOL(ocelot_vlan_prepare);
int ocelot_vlan_add(struct ocelot *ocelot, int port, u16 vid, bool pvid,
bool untagged)
{
+ struct ocelot_port *ocelot_port = ocelot->ports[port];
int err;
/* Ignore VID 0 added to our RX filter by the 8021q module, since
@@ -849,6 +850,11 @@ int ocelot_vlan_add(struct ocelot *ocelot, int port, u16 vid, bool pvid,
ocelot_bridge_vlan_find(ocelot, vid));
if (err)
return err;
+ } else if (ocelot_port->pvid_vlan &&
+ ocelot_bridge_vlan_find(ocelot, vid) == ocelot_port->pvid_vlan) {
+ err = ocelot_port_set_pvid(ocelot, port, NULL);
+ if (err)
+ return err;
}
/* Untagged egress vlan clasification */
--
2.43.0
6 months
- 3
- 3
[PATCH v2 security-next 0/4] Introducing Hornet LSM
by Blaise Boscaccy
This patch series introduces the Hornet LSM. The goal of Hornet is to
provide a signature verification mechanism for eBPF programs.
eBPF has similar requirements to that of modules when it comes to
loading: find symbol addresses, fix up ELF relocations, some struct
field offset handling stuff called CO-RE (compile-once run-anywhere),
and some other miscellaneous bookkeeping. During eBPF program
compilation, pseudo-values get written to the immediate operands of
instructions. During loading, those pseudo-values get rewritten with
concrete addresses or data applicable to the currently running system,
e.g., a kallsyms address or an fd for a map. This needs to happen
before the instructions for a bpf program are loaded into the kernel
via the bpf() syscall. Unlike modules, an in-kernel loader
unfortunately doesn't exist. Typically, the instruction rewriting is
done dynamically in userspace via libbpf. Since the relocations and
instruction modifications are happening in userspace, and their values
may change depending upon the running system, this breaks known
signature verification mechanisms.
Light skeleton programs were introduced in order to support early
loading of eBPF programs along with user-mode drivers. They utilize a
separate eBPF program that can load a target eBPF program and perform
all necessary relocations in-kernel without needing a working
userspace. Light skeletons were mentioned as a possible path forward
for signature verification.
Hornet takes a simple approach to light-skeleton-based eBPF signature
verification. A PKCS#7 signature of a data buffer containing the raw
instructions of an eBPF program, followed by the initial values of any
maps used by the program is used. A utility script is provided to
parse and extract the contents of autogenerated header files created
via bpftool. That payload can then be signed and appended to the light
skeleton executable.
Maps are frozen to prevent TOCTOU bugs where a sufficiently privileged
user could rewrite map data between the calls to BPF_PROG_LOAD and
BPF_PROG_RUN. Additionally, both sparse-array-based and
fd_array_cnt-based map fd arrays are supported for signature
verification.
References:
[1] https://lore.kernel.org/bpf/20220209054315.73833-1-alexei.starovoitov@gmail…
[2] https://lore.kernel.org/bpf/CAADnVQ+wPK1KKZhCgb-Nnf0Xfjk8M1UpX5fnXC=cBzdEYb…
Change list:
- v1 -> v2
- Jargon clarification, maintainer entry and a few cosmetic fixes
Revisions:
- v1
https://lore.kernel.org/bpf/20250321164537.16719-1-bboscaccy@linux.microsof…
Blaise Boscaccy (4):
security: Hornet LSM
hornet: Introduce sign-ebpf
hornet: Add a light-skeleton data extactor script
selftests/hornet: Add a selftest for the Hornet LSM
Documentation/admin-guide/LSM/Hornet.rst | 53 +++
Documentation/admin-guide/LSM/index.rst | 1 +
MAINTAINERS | 9 +
crypto/asymmetric_keys/pkcs7_verify.c | 10 +
include/linux/kernel_read_file.h | 1 +
include/linux/verification.h | 1 +
include/uapi/linux/lsm.h | 1 +
scripts/Makefile | 1 +
scripts/hornet/Makefile | 5 +
scripts/hornet/extract-skel.sh | 29 ++
scripts/hornet/sign-ebpf.c | 411 +++++++++++++++++++
security/Kconfig | 3 +-
security/Makefile | 1 +
security/hornet/Kconfig | 11 +
security/hornet/Makefile | 4 +
security/hornet/hornet_lsm.c | 239 +++++++++++
tools/testing/selftests/Makefile | 1 +
tools/testing/selftests/hornet/Makefile | 51 +++
tools/testing/selftests/hornet/loader.c | 21 +
tools/testing/selftests/hornet/trivial.bpf.c | 33 ++
20 files changed, 885 insertions(+), 1 deletion(-)
create mode 100644 Documentation/admin-guide/LSM/Hornet.rst
create mode 100644 scripts/hornet/Makefile
create mode 100755 scripts/hornet/extract-skel.sh
create mode 100644 scripts/hornet/sign-ebpf.c
create mode 100644 security/hornet/Kconfig
create mode 100644 security/hornet/Makefile
create mode 100644 security/hornet/hornet_lsm.c
create mode 100644 tools/testing/selftests/hornet/Makefile
create mode 100644 tools/testing/selftests/hornet/loader.c
create mode 100644 tools/testing/selftests/hornet/trivial.bpf.c
--
2.48.1
6 months
- 7
- 37
[PATCH v12 net-next 0/5] DUALPI2 patch
by chia-yu.chang＠nokia-bell-labs.com
From: Chia-Yu Chang <chia-yu.chang(a)nokia-bell-labs.com>
Hello,
Please find the DualPI2 patch v12.
v12 (22-Apr-2025)
- Remove anonymous struct in sch_dualpi2.c (Paolo Abeni <pabeni(a)redhat.com>)
- Replace u32/u8 with uint and s32 with int in tc spec document (Paolo Abeni <pabeni(a)redhat.com>)
- Introduce get_memory_limit function to handle potential overflow when multipling limit with MTU (Paolo Abeni <pabeni(a)redhat.com>)
- Double the packet length to further include packet overhead in memory_limit (Paolo Abeni <pabeni(a)redhat.com>)
- Remove the check of qdisc_qlen(sch) when calling qdisc_tree_reduce_backlog (Paolo Abeni <pabeni(a)redhat.com>)
v11 (15-Apr-2025)
- Replace hstimer_init with hstimer_setup in sch_dualpi2.c
v10 (25-Mar-2025)
- Remove leftover include in include/linux/netdevice.h and anonymous struct in sch_dualpi2.c (Paolo Abeni <pabeni(a)redhat.com>)
- Use kfree_skb_reason() and add SKB_DROP_REASON_DUALPI2_STEP_DROP drop reason (Paolo Abeni <pabeni(a)redhat.com>)
- Split sch_dualpi2.c into 3 patches (and overall 5 patches): Struct definition & parsing, Dump stats & configuration, Enqueue/Dequeue (Paolo Abeni <pabeni(a)redhat.com>)
v9 (16-Mar-2025)
- Fix mem_usage error in previous version
- Add min_qlen_step to the dualpi2 attribute as the minimum queue length in number of packets in the L-queue to start step threshold marking.
In previous versions, this value was fixed to 2, so the step threshold was applied to mark packets in the L queue only when the queue length of the L queue was greater than or equal to 2 packets.
This will cause larger queuing delays for L4S traffic at low rates (<20Mbps). So we parameterize it and change the default value to 0.
Comparison of tcp_1down run 'HTB 20Mbit + DUALPI2 + 10ms base delay'
Old versions:
avg median # data pts
Ping (ms) ICMP : 11.55 11.70 ms 350
TCP upload avg : 18.96 N/A Mbits/s 350
TCP upload sum : 18.96 N/A Mbits/s 350
New version (v9):
avg median # data pts
Ping (ms) ICMP : 10.81 10.70 ms 350
TCP upload avg : 18.91 N/A Mbits/s 350
TCP upload sum : 18.91 N/A Mbits/s 350
Comparison of tcp_1down run 'HTB 10Mbit + DUALPI2 + 10ms base delay'
Old versions:
avg median # data pts
Ping (ms) ICMP : 12.61 12.80 ms 350
TCP upload avg : 9.48 N/A Mbits/s 350
TCP upload sum : 9.48 N/A Mbits/s 350
New version (v9):
avg median # data pts
Ping (ms) ICMP : 11.06 10.80 ms 350
TCP upload avg : 9.43 N/A Mbits/s 350
TCP upload sum : 9.43 N/A Mbits/s 350
Comparison of tcp_1down run 'HTB 10Mbit + DUALPI2 + 10ms base delay'
Old versions:
avg median # data pts
Ping (ms) ICMP : 40.86 37.45 ms 350
TCP upload avg : 0.88 N/A Mbits/s 350
TCP upload sum : 0.88 N/A Mbits/s 350
TCP upload::1 : 0.88 0.97 Mbits/s 350
New version (v9):
avg median # data pts
Ping (ms) ICMP : 11.07 10.40 ms 350
TCP upload avg : 0.55 N/A Mbits/s 350
TCP upload sum : 0.55 N/A Mbits/s 350
TCP upload::1 : 0.55 0.59 Mbits/s 350
v8 (11-Mar-2025)
- Fix warning messages in v7
v7 (07-Mar-2025)
- Separate into 3 patches to avoid mixing changes of documentation, selftest, and code. (Cong Wang <xiyou.wangcong(a)gmail.com>)
v6 (04-Mar-2025)
- Add modprobe for dulapi2 in tc-testing script tc-testing/tdc.sh (Jakub Kicinski <kuba(a)kernel.org>)
- Update test cases in dualpi2.json
- Update commit message
v5 (22-Feb-2025)
- A comparison was done between MQ + DUALPI2, MQ + FQ_PIE, MQ + FQ_CODEL:
Unshaped 1gigE with 4 download streams test:
- Summary of tcp_4down run 'MQ + FQ_CODEL':
avg median # data pts
Ping (ms) ICMP : 1.19 1.34 ms 349
TCP download avg : 235.42 N/A Mbits/s 349
TCP download sum : 941.68 N/A Mbits/s 349
TCP download::1 : 235.19 235.39 Mbits/s 349
TCP download::2 : 235.03 235.35 Mbits/s 349
TCP download::3 : 236.89 235.44 Mbits/s 349
TCP download::4 : 234.57 235.19 Mbits/s 349
- Summary of tcp_4down run 'MQ + FQ_PIE'
avg median # data pts
Ping (ms) ICMP : 1.21 1.37 ms 350
TCP download avg : 235.42 N/A Mbits/s 350
TCP download sum : 941.61 N/A Mbits/s 350
TCP download::1 : 232.54 233.13 Mbits/s 350
TCP download::2 : 232.52 232.80 Mbits/s 350
TCP download::3 : 233.14 233.78 Mbits/s 350
TCP download::4 : 243.41 241.48 Mbits/s 350
- Summary of tcp_4down run 'MQ + DUALPI2'
avg median # data pts
Ping (ms) ICMP : 1.19 1.34 ms 349
TCP download avg : 235.42 N/A Mbits/s 349
TCP download sum : 941.68 N/A Mbits/s 349
TCP download::1 : 235.19 235.39 Mbits/s 349
TCP download::2 : 235.03 235.35 Mbits/s 349
TCP download::3 : 236.89 235.44 Mbits/s 349
TCP download::4 : 234.57 235.19 Mbits/s 349
Unshaped 1gigE with 128 download streams test:
- Summary of tcp_128down run 'MQ + FQ_CODEL':
avg median # data pts
Ping (ms) ICMP : 1.88 1.86 ms 350
TCP download avg : 7.39 N/A Mbits/s 350
TCP download sum : 946.47 N/A Mbits/s 350
- Summary of tcp_128down run 'MQ + FQ_PIE':
avg median # data pts
Ping (ms) ICMP : 1.88 1.86 ms 350
TCP download avg : 7.39 N/A Mbits/s 350
TCP download sum : 946.47 N/A Mbits/s 350
- Summary of tcp_128down run 'MQ + DUALPI2':
avg median # data pts
Ping (ms) ICMP : 1.88 1.86 ms 350
TCP download avg : 7.39 N/A Mbits/s 350
TCP download sum : 946.47 N/A Mbits/s 350
Unshaped 10gigE with 4 download streams test:
- Summary of tcp_4down run 'MQ + FQ_CODEL':
avg median # data pts
Ping (ms) ICMP : 0.22 0.23 ms 350
TCP download avg : 2354.08 N/A Mbits/s 350
TCP download sum : 9416.31 N/A Mbits/s 350
TCP download::1 : 2353.65 2352.81 Mbits/s 350
TCP download::2 : 2354.54 2354.21 Mbits/s 350
TCP download::3 : 2353.56 2353.78 Mbits/s 350
TCP download::4 : 2354.56 2354.45 Mbits/s 350
- Summary of tcp_4down run 'MQ + FQ_PIE':
avg median # data pts
Ping (ms) ICMP : 0.20 0.19 ms 350
TCP download avg : 2354.76 N/A Mbits/s 350
TCP download sum : 9419.04 N/A Mbits/s 350
TCP download::1 : 2354.77 2353.89 Mbits/s 350
TCP download::2 : 2353.41 2354.29 Mbits/s 350
TCP download::3 : 2356.18 2354.19 Mbits/s 350
TCP download::4 : 2354.68 2353.15 Mbits/s 350
- Summary of tcp_4down run 'MQ + DUALPI2':
avg median # data pts
Ping (ms) ICMP : 0.24 0.24 ms 350
TCP download avg : 2354.11 N/A Mbits/s 350
TCP download sum : 9416.43 N/A Mbits/s 350
TCP download::1 : 2354.75 2353.93 Mbits/s 350
TCP download::2 : 2353.15 2353.75 Mbits/s 350
TCP download::3 : 2353.49 2353.72 Mbits/s 350
TCP download::4 : 2355.04 2353.73 Mbits/s 350
Unshaped 10gigE with 128 download streams test:
- Summary of tcp_128down run 'MQ + FQ_CODEL':
avg median # data pts
Ping (ms) ICMP : 7.57 8.69 ms 350
TCP download avg : 73.97 N/A Mbits/s 350
TCP download sum : 9467.82 N/A Mbits/s 350
- Summary of tcp_128down run 'MQ + FQ_PIE':
avg median # data pts
Ping (ms) ICMP : 7.82 8.91 ms 350
TCP download avg : 73.97 N/A Mbits/s 350
TCP download sum : 9468.42 N/A Mbits/s 350
- Summary of tcp_128down run 'MQ + DUALPI2':
avg median # data pts
Ping (ms) ICMP : 6.87 7.93 ms 350
TCP download avg : 73.95 N/A Mbits/s 350
TCP download sum : 9465.87 N/A Mbits/s 350
From the results shown above, we see small differences between combinations.
- Update commit message to include results of no_split_gso and split_gso (Dave Taht <dave.taht(a)gmail.com> and Paolo Abeni <pabeni(a)redhat.com>)
- Add memlimit in the dualpi2 attribute, and add memory_used, max_memory_used, memory_limit in dualpi2 stats (Dave Taht <dave.taht(a)gmail.com>)
- Update note in sch_dualpi2.c related to BBRv3 status (Dave Taht <dave.taht(a)gmail.com>)
- Update license identifier (Dave Taht <dave.taht(a)gmail.com>)
- Add selftest in tools/testing/selftests/tc-testing (Cong Wang <xiyou.wangcong(a)gmail.com>)
- Use netlink policies for parameter checks (Jamal Hadi Salim <jhs(a)mojatatu.com>)
- Modify texts & fix typos in Documentation/netlink/specs/tc.yaml (Dave Taht <dave.taht(a)gmail.com>)
- Add descriptions of packet counter statistics and the reset function of sch_dualpi2.c
- Fix step_thresh in packets
- Update code comments in sch_dualpi2.c
v4 (22-Oct-2024)
- Update statement in Kconfig for DualPI2 (Stephen Hemminger <stephen(a)networkplumber.org>)
- Put a blank line after #define in sch_dualpi2.c (Stephen Hemminger <stephen(a)networkplumber.org>)
- Fix line length warning.
v3 (19-Oct-2024)
- Fix compilaiton error
- Update Documentation/netlink/specs/tc.yaml (Jakub Kicinski <kuba(a)kernel.org>)
v2 (18-Oct-2024)
- Add Documentation/netlink/specs/tc.yaml (Jakub Kicinski <kuba(a)kernel.org>)
- Use dualpi2 instead of skb prefix (Jamal Hadi Salim <jhs(a)mojatatu.com>)
- Replace nla_parse_nested_deprecated with nla_parse_nested (Jamal Hadi Salim <jhs(a)mojatatu.com>)
- Fix line length warning
For more details of DualPI2, please refer IETF RFC9332 (https://datatracker.ietf.org/doc/html/rfc9332).
Best regards,
Chia-Yu
Chia-Yu Chang (4):
Documentation: netlink: specs: tc: Add DualPI2 specification
selftests/tc-testing: Add selftests for qdisc DualPI2
sched: Struct definition and parsing of dualpi2 qdisc
sched: Dump configuration and statistics of dualpi2 qdisc
Koen De Schepper (1):
sched: Add enqueue/dequeue of dualpi2 qdisc
Documentation/netlink/specs/tc.yaml | 144 +++
include/net/dropreason-core.h | 6 +
include/uapi/linux/pkt_sched.h | 39 +
net/sched/Kconfig | 12 +
net/sched/Makefile | 1 +
net/sched/sch_dualpi2.c | 1096 +++++++++++++++++
tools/testing/selftests/tc-testing/config | 1 +
.../tc-testing/tc-tests/qdiscs/dualpi2.json | 149 +++
tools/testing/selftests/tc-testing/tdc.sh | 1 +
9 files changed, 1449 insertions(+)
create mode 100644 net/sched/sch_dualpi2.c
create mode 100644 tools/testing/selftests/tc-testing/tc-tests/qdiscs/dualpi2.json
--
2.34.1
6 months
- 3
- 10
[PATCH net-next v4 0/3] Fix netdevim to correctly mark NAPI IDs
by Joe Damato
Greetings:
Welcome to v4.
This series fixes netdevsim to correctly set the NAPI ID on the skb.
This is helpful for writing tests around features that use
SO_INCOMING_NAPI_ID.
In addition to the netdevsim fix in patch 1, patches 2 & 3 do some self
test refactoring and add a test for NAPI IDs. The test itself (patch 3)
introduces a C helper because apparently python doesn't have
socket.SO_INCOMING_NAPI_ID.
Thanks,
Joe
v4:
- Updated the macro guard in patch 2
- Removed the remote deploy from patch 3
v3: https://lore.kernel.org/netdev/20250418013719.12094-1-jdamato@fastly.com/
- Dropped patch 3 from v2 as it is no longer necessary.
- Patch 3 from this series (which was patch 4 in the v2)
- Sorted .gitignore alphabetically
- added cfg.remote_deploy so the test supports real remote machines
- Dropped the NetNSEnter as it is unnecessary
- Fixed a string interpolation issue that Paolo hit with his Python
version
v2: https://lore.kernel.org/netdev/20250417013301.39228-1-jdamato@fastly.com/
- No longer an RFC
- Minor whitespace change in patch 1 (no functional change).
- Patches 2-4 new in v2
rfcv1: https://lore.kernel.org/netdev/20250329000030.39543-1-jdamato@fastly.com/
Joe Damato (3):
netdevsim: Mark NAPI ID on skb in nsim_rcv
selftests: drv-net: Factor out ksft C helpers
selftests: drv-net: Test that NAPI ID is non-zero
drivers/net/netdevsim/netdev.c | 2 +
.../testing/selftests/drivers/net/.gitignore | 1 +
tools/testing/selftests/drivers/net/Makefile | 6 +-
tools/testing/selftests/drivers/net/ksft.h | 56 +++++++++++++
.../testing/selftests/drivers/net/napi_id.py | 23 +++++
.../selftests/drivers/net/napi_id_helper.c | 83 +++++++++++++++++++
.../selftests/drivers/net/xdp_helper.c | 49 +----------
7 files changed, 172 insertions(+), 48 deletions(-)
create mode 100644 tools/testing/selftests/drivers/net/ksft.h
create mode 100755 tools/testing/selftests/drivers/net/napi_id.py
create mode 100644 tools/testing/selftests/drivers/net/napi_id_helper.c
base-commit: cd7276ecac9c64c80433fbcff2e35aceaea6f477
--
2.43.0
6 months
- 3
- 5
[PATCH v12 00/28] riscv control-flow integrity for usermode
by Deepak Gupta
Basics and overview
===================
Software with larger attack surfaces (e.g. network facing apps like databases,
browsers or apps relying on browser runtimes) suffer from memory corruption
issues which can be utilized by attackers to bend control flow of the program
to eventually gain control (by making their payload executable). Attackers are
able to perform such attacks by leveraging call-sites which rely on indirect
calls or return sites which rely on obtaining return address from stack memory.
To mitigate such attacks, risc-v extension zicfilp enforces that all indirect
calls must land on a landing pad instruction `lpad` else cpu will raise software
check exception (a new cpu exception cause code on riscv).
Similarly for return flow, risc-v extension zicfiss extends architecture with
- `sspush` instruction to push return address on a shadow stack
- `sspopchk` instruction to pop return address from shadow stack
and compare with input operand (i.e. return address on stack)
- `sspopchk` to raise software check exception if comparision above
was a mismatch
- Protection mechanism using which shadow stack is not writeable via
regular store instructions
More information an details can be found at extensions github repo [1].
Equivalent to landing pad (zicfilp) on x86 is `ENDBRANCH` instruction in Intel
CET [3] and branch target identification (BTI) [4] on arm.
Similarly x86's Intel CET has shadow stack [5] and arm64 has guarded control
stack (GCS) [6] which are very similar to risc-v's zicfiss shadow stack.
x86 and arm64 support for user mode shadow stack is already in mainline.
Kernel awareness for user control flow integrity
================================================
This series picks up Samuel Holland's envcfg changes [2] as well. So if those are
being applied independently, they should be removed from this series.
Enabling:
In order to maintain compatibility and not break anything in user mode, kernel
doesn't enable control flow integrity cpu extensions on binary by default.
Instead exposes a prctl interface to enable, disable and lock the shadow stack
or landing pad feature for a task. This allows userspace (loader) to enumerate
if all objects in its address space are compiled with shadow stack and landing
pad support and accordingly enable the feature. Additionally if a subsequent
`dlopen` happens on a library, user mode can take a decision again to disable
the feature (if incoming library is not compiled with support) OR terminate the
task (if user mode policy is strict to have all objects in address space to be
compiled with control flow integirty cpu feature). prctl to enable shadow stack
results in allocating shadow stack from virtual memory and activating for user
address space. x86 and arm64 are also following same direction due to similar
reason(s).
clone/fork:
On clone and fork, cfi state for task is inherited by child. Shadow stack is
part of virtual memory and is a writeable memory from kernel perspective
(writeable via a restricted set of instructions aka shadow stack instructions)
Thus kernel changes ensure that this memory is converted into read-only when
fork/clone happens and COWed when fault is taken due to sspush, sspopchk or
ssamoswap. In case `CLONE_VM` is specified and shadow stack is to be enabled,
kernel will automatically allocate a shadow stack for that clone call.
map_shadow_stack:
x86 introduced `map_shadow_stack` system call to allow user space to explicitly
map shadow stack memory in its address space. It is useful to allocate shadow
for different contexts managed by a single thread (green threads or contexts)
risc-v implements this system call as well.
signal management:
If shadow stack is enabled for a task, kernel performs an asynchronous control
flow diversion to deliver the signal and eventually expects userspace to issue
sigreturn so that original execution can be resumed. Even though resume context
is prepared by kernel, it is in user space memory and is subject to memory
corruption and corruption bugs can be utilized by attacker in this race window
to perform arbitrary sigreturn and eventually bypass cfi mechanism.
Another issue is how to ensure that cfi related state on sigcontext area is not
trampled by legacy apps or apps compiled with old kernel headers.
In order to mitigate control-flow hijacting, kernel prepares a token and place
it on shadow stack before signal delivery and places address of token in
sigcontext structure. During sigreturn, kernel obtains address of token from
sigcontext struture, reads token from shadow stack and validates it and only
then allow sigreturn to succeed. Compatiblity issue is solved by adopting
dynamic sigcontext management introduced for vector extension. This series
re-factor the code little bit to allow future sigcontext management easy (as
proposed by Andy Chiu from SiFive)
config and compilation:
Introduce a new risc-v config option `CONFIG_RISCV_USER_CFI`. Selecting this
config option picks the kernel support for user control flow integrity. This
optin is presented only if toolchain has shadow stack and landing pad support.
And is on purpose guarded by toolchain support. Reason being that eventually
vDSO also needs to be compiled in with shadow stack and landing pad support.
vDSO compile patches are not included as of now because landing pad labeling
scheme is yet to settle for usermode runtime.
To get more information on kernel interactions with respect to
zicfilp and zicfiss, patch series adds documentation for
`zicfilp` and `zicfiss` in following:
Documentation/arch/riscv/zicfiss.rst
Documentation/arch/riscv/zicfilp.rst
How to test this series
=======================
Toolchain
---------
$ git clone git@github.com:sifive/riscv-gnu-toolchain.git -b cfi-dev
$ riscv-gnu-toolchain/configure --prefix=<path-to-where-to-build> --with-arch=rv64gc_zicfilp_zicfiss --enable-linux --disable-gdb --with-extra-multilib-test="rv64gc_zicfilp_zicfiss-lp64d:-static"
$ make -j$(nproc)
Qemu
----
Get the lastest qemu
$ cd qemu
$ mkdir build
$ cd build
$ ../configure --target-list=riscv64-softmmu
$ make -j$(nproc)
Opensbi
-------
$ git clone git@github.com:deepak0414/opensbi.git -b v6_cfi_spec_split_opensbi
$ make CROSS_COMPILE=<your riscv toolchain> -j$(nproc) PLATFORM=generic
Linux
-----
Running defconfig is fine. CFI is enabled by default if the toolchain
supports it.
$ make ARCH=riscv CROSS_COMPILE=<path-to-cfi-riscv-gnu-toolchain>/build/bin/riscv64-unknown-linux-gnu- -j$(nproc) defconfig
$ make ARCH=riscv CROSS_COMPILE=<path-to-cfi-riscv-gnu-toolchain>/build/bin/riscv64-unknown-linux-gnu- -j$(nproc)
In case you're building your own rootfs using toolchain, please make sure you
pick following patch to ensure that vDSO compiled with lpad and shadow stack.
"arch/riscv: compile vdso with landing pad"
Branch where above patch can be picked
https://github.com/deepak0414/linux-riscv-cfi/tree/vdso_user_cfi_v6.12-rc1
Running
-------
Modify your qemu command to have:
-bios <path-to-cfi-opensbi>/build/platform/generic/firmware/fw_dynamic.bin
-cpu rv64,zicfilp=true,zicfiss=true,zimop=true,zcmop=true
vDSO related Opens (in the flux)
=================================
I am listing these opens for laying out plan and what to expect in future
patch sets. And of course for the sake of discussion.
Shadow stack and landing pad enabling in vDSO
----------------------------------------------
vDSO must have shadow stack and landing pad support compiled in for task
to have shadow stack and landing pad support. This patch series doesn't
enable that (yet). Enabling shadow stack support in vDSO should be
straight forward (intend to do that in next versions of patch set). Enabling
landing pad support in vDSO requires some collaboration with toolchain folks
to follow a single label scheme for all object binaries. This is necessary to
ensure that all indirect call-sites are setting correct label and target landing
pads are decorated with same label scheme.
How many vDSOs
---------------
Shadow stack instructions are carved out of zimop (may be operations) and if CPU
doesn't implement zimop, they're illegal instructions. Kernel could be running on
a CPU which may or may not implement zimop. And thus kernel will have to carry 2
different vDSOs and expose the appropriate one depending on whether CPU implements
zimop or not.
References
==========
[1] - https://github.com/riscv/riscv-cfi
[2] - https://lore.kernel.org/all/20240814081126.956287-1-samuel.holland@sifive.c…
[3] - https://lwn.net/Articles/889475/
[4] - https://developer.arm.com/documentation/109576/0100/Branch-Target-Identific…
[5] - https://www.intel.com/content/dam/develop/external/us/en/documents/catc17-i…
[6] - https://lwn.net/Articles/940403/
---
changelog
---------
v12:
- It seems like I had accidently squashed arch agnostic indirect branch
tracking prctl and riscv implementation of those prctls. Split them again.
- set_shstk_status/set_indir_lp_status perform CSR writes only when CPU
support is available. As suggested by Zong Li.
- Some minor clean up in kselftests as suggested by Zong Li.
v11:
- patch "arch/riscv: compile vdso with landing pad" was unconditionally
selecting `_zicfilp` for vDSO compile. fixed that. Changed `lpad 1` to
to `lpad 0`.
v10:
- dropped "mm: helper `is_shadow_stack_vma` to check shadow stack vma". This patch
is not that interesting to this patch series for risc-v. There are instances in
arch directories where VM_SHADOW_STACK flag is anyways used. Dropping this patch
to expedite merging in riscv tree.
- Took suggestions from `Clement` on "riscv: zicfiss / zicfilp enumeration" to
validate presence of cfi based on config.
- Added a patch for vDSO to have `lpad 0`. I had omitted this earlier to make sure
we add single vdso object with cfi enabled. But a vdso object with scheme of
zero labeled landing pad is least common denominator and should work with all
objects of zero labeled as well as function-signature labeled objects.
v9:
- rebased on master (39a803b754d5 fix braino in "9p: fix ->rename_sem exclusion")
- dropped "mm: Introduce ARCH_HAS_USER_SHADOW_STACK" (master has it from arm64/gcs)
- dropped "prctl: arch-agnostic prctl for shadow stack" (master has it from arm64/gcs)
v8:
- rebased on palmer/for-next
- dropped samuel holland's `envcfg` context switch patches.
they are in parlmer/for-next
v7:
- Removed "riscv/Kconfig: enable HAVE_EXIT_THREAD for riscv"
Instead using `deactivate_mm` flow to clean up.
see here for more context
https://lore.kernel.org/all/20230908203655.543765-1-rick.p.edgecombe@intel.…
- Changed the header include in `kselftest`. Hopefully this fixes compile
issue faced by Zong Li at SiFive.
- Cleaned up an orphaned change to `mm/mmap.c` in below patch
"riscv/mm : ensure PROT_WRITE leads to VM_READ | VM_WRITE"
- Lock interfaces for shadow stack and indirect branch tracking expect arg == 0
Any future evolution of this interface should accordingly define how arg should
be setup.
- `mm/map.c` has an instance of using `VM_SHADOW_STACK`. Fixed it to use helper
`is_shadow_stack_vma`.
- Link to v6: https://lore.kernel.org/r/20241008-v5_user_cfi_series-v6-0-60d9fe073f37@riv…
v6:
- Picked up Samuel Holland's changes as is with `envcfg` placed in
`thread` instead of `thread_info`
- fixed unaligned newline escapes in kselftest
- cleaned up messages in kselftest and included test output in commit message
- fixed a bug in clone path reported by Zong Li
- fixed a build issue if CONFIG_RISCV_ISA_V is not selected
(this was introduced due to re-factoring signal context
management code)
v5:
- rebased on v6.12-rc1
- Fixed schema related issues in device tree file
- Fixed some of the documentation related issues in zicfilp/ss.rst
(style issues and added index)
- added `SHADOW_STACK_SET_MARKER` so that implementation can define base
of shadow stack.
- Fixed warnings on definitions added in usercfi.h when
CONFIG_RISCV_USER_CFI is not selected.
- Adopted context header based signal handling as proposed by Andy Chiu
- Added support for enabling kernel mode access to shadow stack using
FWFT
(https://github.com/riscv-non-isa/riscv-sbi-doc/blob/master/src/ext-firmware…)
- Link to v5: https://lore.kernel.org/r/20241001-v5_user_cfi_series-v1-0-3ba65b6e550f@riv…
(Note: I had an issue in my workflow due to which version number wasn't
picked up correctly while sending out patches)
v4:
- rebased on 6.11-rc6
- envcfg: Converged with Samuel Holland's patches for envcfg management on per-
thread basis.
- vma_is_shadow_stack is renamed to is_vma_shadow_stack
- picked up Mark Brown's `ARCH_HAS_USER_SHADOW_STACK` patch
- signal context: using extended context management to maintain compatibility.
- fixed `-Wmissing-prototypes` compiler warnings for prctl functions
- Documentation fixes and amending typos.
- Link to v4: https://lore.kernel.org/all/20240912231650.3740732-1-debug@rivosinc.com/
v3:
- envcfg
logic to pick up base envcfg had a bug where `ENVCFG_CBZE` could have been
picked on per task basis, even though CPU didn't implement it. Fixed in
this series.
- dt-bindings
As suggested, split into separate commit. fixed the messaging that spec is
in public review
- arch_is_shadow_stack change
arch_is_shadow_stack changed to vma_is_shadow_stack
- hwprobe
zicfiss / zicfilp if present will get enumerated in hwprobe
- selftests
As suggested, added object and binary filenames to .gitignore
Selftest binary anyways need to be compiled with cfi enabled compiler which
will make sure that landing pad and shadow stack are enabled. Thus removed
separate enable/disable tests. Cleaned up tests a bit.
- Link to v3: https://lore.kernel.org/lkml/20240403234054.2020347-1-debug@rivosinc.com/
v2:
- Using config `CONFIG_RISCV_USER_CFI`, kernel support for riscv control flow
integrity for user mode programs can be compiled in the kernel.
- Enabling of control flow integrity for user programs is left to user runtime
- This patch series introduces arch agnostic `prctls` to enable shadow stack
and indirect branch tracking. And implements them on riscv.
---
---
Changes in v12:
- EDITME: describe what is new in this series revision.
- EDITME: use bulletpoints and terse descriptions.
- Link to v11: https://lore.kernel.org/r/20250310-v5_user_cfi_series-v11-0-86b36cbfb910@ri…
Changes in v11:
- EDITME: describe what is new in this series revision.
- EDITME: use bulletpoints and terse descriptions.
- Link to v10: https://lore.kernel.org/r/20250210-v5_user_cfi_series-v10-0-163dcfa31c60@ri…
---
Andy Chiu (1):
riscv: signal: abstract header saving for setup_sigcontext
Clément Léger (1):
riscv: Add Firmware Feature SBI extensions definitions
Deepak Gupta (25):
mm: VM_SHADOW_STACK definition for riscv
dt-bindings: riscv: zicfilp and zicfiss in dt-bindings (extensions.yaml)
riscv: zicfiss / zicfilp enumeration
riscv: zicfiss / zicfilp extension csr and bit definitions
riscv: usercfi state for task and save/restore of CSR_SSP on trap entry/exit
riscv/mm : ensure PROT_WRITE leads to VM_READ | VM_WRITE
riscv mm: manufacture shadow stack pte
riscv mmu: teach pte_mkwrite to manufacture shadow stack PTEs
riscv mmu: write protect and shadow stack
riscv/mm: Implement map_shadow_stack() syscall
riscv/shstk: If needed allocate a new shadow stack on clone
riscv: Implements arch agnostic shadow stack prctls
prctl: arch-agnostic prctl for indirect branch tracking
riscv: Implements arch agnostic indirect branch tracking prctls
riscv/traps: Introduce software check exception
riscv/signal: save and restore of shadow stack for signal
riscv/kernel: update __show_regs to print shadow stack register
riscv/ptrace: riscv cfi status and state via ptrace and in core files
riscv/hwprobe: zicfilp / zicfiss enumeration in hwprobe
riscv: enable kernel access to shadow stack memory via FWFT sbi call
riscv: kernel command line option to opt out of user cfi
riscv: create a config for shadow stack and landing pad instr support
riscv: Documentation for landing pad / indirect branch tracking
riscv: Documentation for shadow stack on riscv
kselftest/riscv: kselftest for user mode cfi
Jim Shu (1):
arch/riscv: compile vdso with landing pad
Documentation/arch/riscv/index.rst | 2 +
Documentation/arch/riscv/zicfilp.rst | 115 +++++
Documentation/arch/riscv/zicfiss.rst | 176 +++++++
.../devicetree/bindings/riscv/extensions.yaml | 14 +
arch/riscv/Kconfig | 20 +
arch/riscv/Makefile | 5 +-
arch/riscv/include/asm/asm-prototypes.h | 1 +
arch/riscv/include/asm/assembler.h | 44 ++
arch/riscv/include/asm/cpufeature.h | 13 +
arch/riscv/include/asm/csr.h | 16 +
arch/riscv/include/asm/entry-common.h | 2 +
arch/riscv/include/asm/hwcap.h | 2 +
arch/riscv/include/asm/mman.h | 25 +
arch/riscv/include/asm/mmu_context.h | 7 +
arch/riscv/include/asm/pgtable.h | 30 +-
arch/riscv/include/asm/processor.h | 2 +
arch/riscv/include/asm/sbi.h | 26 +
arch/riscv/include/asm/thread_info.h | 3 +
arch/riscv/include/asm/usercfi.h | 89 ++++
arch/riscv/include/asm/vector.h | 3 +
arch/riscv/include/uapi/asm/hwprobe.h | 2 +
arch/riscv/include/uapi/asm/ptrace.h | 22 +
arch/riscv/include/uapi/asm/sigcontext.h | 1 +
arch/riscv/kernel/Makefile | 1 +
arch/riscv/kernel/asm-offsets.c | 8 +
arch/riscv/kernel/cpufeature.c | 13 +
arch/riscv/kernel/entry.S | 31 +-
arch/riscv/kernel/head.S | 12 +
arch/riscv/kernel/process.c | 26 +-
arch/riscv/kernel/ptrace.c | 83 ++++
arch/riscv/kernel/signal.c | 142 +++++-
arch/riscv/kernel/sys_hwprobe.c | 2 +
arch/riscv/kernel/sys_riscv.c | 10 +
arch/riscv/kernel/traps.c | 43 ++
arch/riscv/kernel/usercfi.c | 530 +++++++++++++++++++++
arch/riscv/kernel/vdso/Makefile | 12 +
arch/riscv/kernel/vdso/flush_icache.S | 4 +
arch/riscv/kernel/vdso/getcpu.S | 4 +
arch/riscv/kernel/vdso/rt_sigreturn.S | 4 +
arch/riscv/kernel/vdso/sys_hwprobe.S | 4 +
arch/riscv/mm/init.c | 2 +-
arch/riscv/mm/pgtable.c | 17 +
include/linux/cpu.h | 4 +
include/linux/mm.h | 7 +
include/uapi/linux/elf.h | 1 +
include/uapi/linux/prctl.h | 27 ++
kernel/sys.c | 30 ++
tools/testing/selftests/riscv/Makefile | 2 +-
tools/testing/selftests/riscv/cfi/.gitignore | 3 +
tools/testing/selftests/riscv/cfi/Makefile | 10 +
tools/testing/selftests/riscv/cfi/cfi_rv_test.h | 82 ++++
tools/testing/selftests/riscv/cfi/riscv_cfi_test.c | 78 +++
tools/testing/selftests/riscv/cfi/shadowstack.c | 385 +++++++++++++++
tools/testing/selftests/riscv/cfi/shadowstack.h | 27 ++
54 files changed, 2195 insertions(+), 29 deletions(-)
---
base-commit: 39a803b754d5224a3522016b564113ee1e4091b2
change-id: 20240930-v5_user_cfi_series-3dc332f8f5b2
--
- debug
6 months
- 5
- 82
[PATCH bpf-next v2] bpf: Allow XDP dev-bound programs to perform XDP_REDIRECT into maps
by Lorenzo Bianconi
In the current implementation if the program is dev-bound to a specific
device, it will not be possible to perform XDP_REDIRECT into a DEVMAP
or CPUMAP even if the program is running in the driver NAPI context and
it is not attached to any map entry. This seems in contrast with the
explanation available in bpf_prog_map_compatible routine.
Fix the issue introducing __bpf_prog_map_compatible utility routine in
order to avoid bpf_prog_is_dev_bound() check running bpf_check_tail_call()
at program load time (bpf_prog_select_runtime()).
Continue forbidding to attach a dev-bound program to XDP maps
(BPF_MAP_TYPE_PROG_ARRAY, BPF_MAP_TYPE_DEVMAP and BPF_MAP_TYPE_CPUMAP).
Fixes: 3d76a4d3d4e59 ("bpf: XDP metadata RX kfuncs")
Signed-off-by: Lorenzo Bianconi <lorenzo(a)kernel.org>
---
Changes in v2:
- Introduce __bpf_prog_map_compatible() utility routine in order to skip
bpf_prog_is_dev_bound check in bpf_check_tail_call()
- Extend xdp_metadata selftest
- Link to v1: https://lore.kernel.org/r/20250422-xdp-prog-bound-fix-v1-1-0b581fa186fe@ker…
---
kernel/bpf/core.c | 27 +++++++++++++---------
.../selftests/bpf/prog_tests/xdp_metadata.c | 22 +++++++++++++++++-
tools/testing/selftests/bpf/progs/xdp_metadata.c | 13 +++++++++++
3 files changed, 50 insertions(+), 12 deletions(-)
diff --git a/kernel/bpf/core.c b/kernel/bpf/core.c
index ba6b6118cf504041278d05417c4212d57be6fca0..a3e571688421196c3ceaed62b3b59b62a0258a8c 100644
--- a/kernel/bpf/core.c
+++ b/kernel/bpf/core.c
@@ -2358,8 +2358,8 @@ static unsigned int __bpf_prog_ret0_warn(const void *ctx,
return 0;
}
-bool bpf_prog_map_compatible(struct bpf_map *map,
- const struct bpf_prog *fp)
+static bool __bpf_prog_map_compatible(struct bpf_map *map,
+ const struct bpf_prog *fp)
{
enum bpf_prog_type prog_type = resolve_prog_type(fp);
bool ret;
@@ -2368,14 +2368,6 @@ bool bpf_prog_map_compatible(struct bpf_map *map,
if (fp->kprobe_override)
return false;
- /* XDP programs inserted into maps are not guaranteed to run on
- * a particular netdev (and can run outside driver context entirely
- * in the case of devmap and cpumap). Until device checks
- * are implemented, prohibit adding dev-bound programs to program maps.
- */
- if (bpf_prog_is_dev_bound(aux))
- return false;
-
spin_lock(&map->owner.lock);
if (!map->owner.type) {
/* There's no owner yet where we could check for
@@ -2409,6 +2401,19 @@ bool bpf_prog_map_compatible(struct bpf_map *map,
return ret;
}
+bool bpf_prog_map_compatible(struct bpf_map *map, const struct bpf_prog *fp)
+{
+ /* XDP programs inserted into maps are not guaranteed to run on
+ * a particular netdev (and can run outside driver context entirely
+ * in the case of devmap and cpumap). Until device checks
+ * are implemented, prohibit adding dev-bound programs to program maps.
+ */
+ if (bpf_prog_is_dev_bound(fp->aux))
+ return false;
+
+ return __bpf_prog_map_compatible(map, fp);
+}
+
static int bpf_check_tail_call(const struct bpf_prog *fp)
{
struct bpf_prog_aux *aux = fp->aux;
@@ -2421,7 +2426,7 @@ static int bpf_check_tail_call(const struct bpf_prog *fp)
if (!map_type_contains_progs(map))
continue;
- if (!bpf_prog_map_compatible(map, fp)) {
+ if (!__bpf_prog_map_compatible(map, fp)) {
ret = -EINVAL;
goto out;
}
diff --git a/tools/testing/selftests/bpf/prog_tests/xdp_metadata.c b/tools/testing/selftests/bpf/prog_tests/xdp_metadata.c
index 3d47878ef6bfb55c236dc9df2c100fcc449f8de3..19f92affc2daa23fdd869554e7a0475b86350a4f 100644
--- a/tools/testing/selftests/bpf/prog_tests/xdp_metadata.c
+++ b/tools/testing/selftests/bpf/prog_tests/xdp_metadata.c
@@ -351,9 +351,10 @@ void test_xdp_metadata(void)
struct xdp_metadata2 *bpf_obj2 = NULL;
struct xdp_metadata *bpf_obj = NULL;
struct bpf_program *new_prog, *prog;
+ struct bpf_devmap_val devmap_e = {};
+ struct bpf_map *prog_arr, *devmap;
struct nstoken *tok = NULL;
__u32 queue_id = QUEUE_ID;
- struct bpf_map *prog_arr;
struct xsk tx_xsk = {};
struct xsk rx_xsk = {};
__u32 val, key = 0;
@@ -409,6 +410,13 @@ void test_xdp_metadata(void)
bpf_program__set_ifindex(prog, rx_ifindex);
bpf_program__set_flags(prog, BPF_F_XDP_DEV_BOUND_ONLY);
+ /* Make sure we can load a dev-bound program that performs
+ * XDP_REDIRECT into a devmap.
+ */
+ new_prog = bpf_object__find_program_by_name(bpf_obj->obj, "redirect");
+ bpf_program__set_ifindex(new_prog, rx_ifindex);
+ bpf_program__set_flags(new_prog, BPF_F_XDP_DEV_BOUND_ONLY);
+
if (!ASSERT_OK(xdp_metadata__load(bpf_obj), "load skeleton"))
goto out;
@@ -423,6 +431,18 @@ void test_xdp_metadata(void)
"update prog_arr"))
goto out;
+ /* Make sure we can't add dev-bound programs to devmaps. */
+ devmap = bpf_object__find_map_by_name(bpf_obj->obj, "dev_map");
+ if (!ASSERT_OK_PTR(devmap, "no dev_map found"))
+ goto out;
+
+ devmap_e.bpf_prog.fd = val;
+ if (!ASSERT_ERR(bpf_map__update_elem(devmap, &key, sizeof(key),
+ &devmap_e, sizeof(devmap_e),
+ BPF_ANY),
+ "update dev_map"))
+ goto out;
+
/* Attach BPF program to RX interface. */
ret = bpf_xdp_attach(rx_ifindex,
diff --git a/tools/testing/selftests/bpf/progs/xdp_metadata.c b/tools/testing/selftests/bpf/progs/xdp_metadata.c
index 31ca229bb3c0f182483334a4ab0bd204acae20f3..09bb8a038d528cf26c5b314cc927915ac2796bf0 100644
--- a/tools/testing/selftests/bpf/progs/xdp_metadata.c
+++ b/tools/testing/selftests/bpf/progs/xdp_metadata.c
@@ -19,6 +19,13 @@ struct {
__type(value, __u32);
} prog_arr SEC(".maps");
+struct {
+ __uint(type, BPF_MAP_TYPE_DEVMAP);
+ __uint(key_size, sizeof(__u32));
+ __uint(value_size, sizeof(struct bpf_devmap_val));
+ __uint(max_entries, 1);
+} dev_map SEC(".maps");
+
extern int bpf_xdp_metadata_rx_timestamp(const struct xdp_md *ctx,
__u64 *timestamp) __ksym;
extern int bpf_xdp_metadata_rx_hash(const struct xdp_md *ctx, __u32 *hash,
@@ -95,4 +102,10 @@ int rx(struct xdp_md *ctx)
return bpf_redirect_map(&xsk, ctx->rx_queue_index, XDP_PASS);
}
+SEC("xdp")
+int redirect(struct xdp_md *ctx)
+{
+ return bpf_redirect_map(&dev_map, ctx->rx_queue_index, XDP_PASS);
+}
+
char _license[] SEC("license") = "GPL";
---
base-commit: 5cffad0a5c8f0cc53ce9fe7cff7bc67c3a97c406
change-id: 20250422-xdp-prog-bound-fix-9f30f3e134aa
Best regards,
--
Lorenzo Bianconi <lorenzo(a)kernel.org>
6 months
- 5
- 10
[PATCH net 1/2] net/devmem: Reject insufficiently large dmabuf pools
by Cosmin Ratiu
Drivers that are told to allocate RX buffers from pools of DMA memory
should have enough memory in the pool to satisfy projected allocation
requests (a function of ring size, MTU & other parameters). If there's
not enough memory, RX ring refill might fail later at inconvenient times
(e.g. during NAPI poll).
This commit adds a check at dmabuf pool init time that compares the
amount of memory in the underlying chunk pool (configured by the user
space application providing dmabuf memory) with the desired pool size
(previously set by the driver) and fails with an error message if chunk
memory isn't enough.
Fixes: 0f9214046893 ("memory-provider: dmabuf devmem memory provider")
Signed-off-by: Cosmin Ratiu <cratiu(a)nvidia.com>
---
net/core/devmem.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/net/core/devmem.c b/net/core/devmem.c
index 6e27a47d0493..651cd55ebb28 100644
--- a/net/core/devmem.c
+++ b/net/core/devmem.c
@@ -299,6 +299,7 @@ net_devmem_bind_dmabuf(struct net_device *dev, unsigned int dmabuf_fd,
int mp_dmabuf_devmem_init(struct page_pool *pool)
{
struct net_devmem_dmabuf_binding *binding = pool->mp_priv;
+ size_t size;
if (!binding)
return -EINVAL;
@@ -312,6 +313,16 @@ int mp_dmabuf_devmem_init(struct page_pool *pool)
if (pool->p.order != 0)
return -E2BIG;
+ /* Validate that the underlying dmabuf has enough memory to satisfy
+ * requested pool size.
+ */
+ size = gen_pool_size(binding->chunk_pool) >> PAGE_SHIFT;
+ if (size < pool->p.pool_size) {
+ pr_warn("%s: Insufficient dmabuf memory (%zu pages) to satisfy pool_size (%u pages)\n",
+ __func__, size, pool->p.pool_size);
+ return -ENOMEM;
+ }
+
net_devmem_dmabuf_binding_get(binding);
return 0;
}
--
2.45.0
6 months
- 3
- 14
[PATCH v1] selftests: iou-zcrx: Get the page size at runtime
by Haiyue Wang
Use the API `sysconf()` to query page size at runtime, instead of using
hard code number 4096.
And use `posix_memalign` to allocate the page size aligned momory.
Signed-off-by: Haiyue Wang <haiyuewa(a)163.com>
---
.../selftests/drivers/net/hw/iou-zcrx.c | 23 ++++++++++++-------
1 file changed, 15 insertions(+), 8 deletions(-)
diff --git a/tools/testing/selftests/drivers/net/hw/iou-zcrx.c b/tools/testing/selftests/drivers/net/hw/iou-zcrx.c
index c26b4180eddd..8aa426014c87 100644
--- a/tools/testing/selftests/drivers/net/hw/iou-zcrx.c
+++ b/tools/testing/selftests/drivers/net/hw/iou-zcrx.c
@@ -37,8 +37,8 @@
#include <liburing.h>
-#define PAGE_SIZE (4096)
-#define AREA_SIZE (8192 * PAGE_SIZE)
+static long page_size;
+#define AREA_SIZE (8192 * page_size)
#define SEND_SIZE (512 * 4096)
#define min(a, b) \
({ \
@@ -66,7 +66,7 @@ static int cfg_oneshot_recvs;
static int cfg_send_size = SEND_SIZE;
static struct sockaddr_in6 cfg_addr;
-static char payload[SEND_SIZE] __attribute__((aligned(PAGE_SIZE)));
+static char *payload;
static void *area_ptr;
static void *ring_ptr;
static size_t ring_size;
@@ -114,8 +114,8 @@ static inline size_t get_refill_ring_size(unsigned int rq_entries)
ring_size = rq_entries * sizeof(struct io_uring_zcrx_rqe);
/* add space for the header (head/tail/etc.) */
- ring_size += PAGE_SIZE;
- return ALIGN_UP(ring_size, 4096);
+ ring_size += page_size;
+ return ALIGN_UP(ring_size, page_size);
}
static void setup_zcrx(struct io_uring *ring)
@@ -219,7 +219,7 @@ static void process_accept(struct io_uring *ring, struct io_uring_cqe *cqe)
connfd = cqe->res;
if (cfg_oneshot)
- add_recvzc_oneshot(ring, connfd, PAGE_SIZE);
+ add_recvzc_oneshot(ring, connfd, page_size);
else
add_recvzc(ring, connfd);
}
@@ -245,7 +245,7 @@ static void process_recvzc(struct io_uring *ring, struct io_uring_cqe *cqe)
if (cfg_oneshot) {
if (cqe->res == 0 && cqe->flags == 0 && cfg_oneshot_recvs) {
- add_recvzc_oneshot(ring, connfd, PAGE_SIZE);
+ add_recvzc_oneshot(ring, connfd, page_size);
cfg_oneshot_recvs--;
}
} else if (!(cqe->flags & IORING_CQE_F_MORE)) {
@@ -370,7 +370,7 @@ static void usage(const char *filepath)
static void parse_opts(int argc, char **argv)
{
- const int max_payload_len = sizeof(payload) -
+ const int max_payload_len = SEND_SIZE -
sizeof(struct ipv6hdr) -
sizeof(struct tcphdr) -
40 /* max tcp options */;
@@ -443,6 +443,13 @@ int main(int argc, char **argv)
const char *cfg_test = argv[argc - 1];
int i;
+ page_size = sysconf(_SC_PAGESIZE);
+ if (page_size < 0)
+ return 1;
+
+ if (posix_memalign((void **)&payload, page_size, SEND_SIZE))
+ return 1;
+
parse_opts(argc, argv);
for (i = 0; i < SEND_SIZE; i++)
--
2.49.0
6 months
- 6
- 8
Call for Participation: Automated Testing Summit 2025 @ OSS NA
by Gustavo Padovan
The Automated Testing Summit (ATS) 2025 will be held as a co-located event at the Open Source Summit North America, and we’re now accepting talk proposals!
https://events.linuxfoundation.org/open-source-summit-north-america/feature…
📅 Date: June 26, 2025
📍 Location: Denver, CO, USA
Hosted by KernelCI, ATS is a technical summit focused on the challenges of testing and quality assurance in the Linux ecosystem — especially in upstream kernel development, embedded systems, cloud environments, and CI integration.
This is a great opportunity to share your work on:
* Kernel and userspace test frameworks
* Lab infrastructure and automation
* CI/CD pipelines for Linux
* Fuzzing, performance testing, and debugging tools
* Sharing and standardizing test results across systems
Whether you’re working on kernel testing, running tests on hardware labs, developing QA tools, or building infrastructure that scales across projects, ATS is the place to collaborate and move the ecosystem forward.
Submit your talk by May 18, 2025:
👉 Call for Proposals (CFP): https://sessionize.com/atsna2025
We hope to see you in Denver!
— The KernelCI Team
6 months
- 1
- 0
[PATCH v13 00/28] riscv control-flow integrity for usermode
by Deepak Gupta
Basics and overview
===================
Software with larger attack surfaces (e.g. network facing apps like databases,
browsers or apps relying on browser runtimes) suffer from memory corruption
issues which can be utilized by attackers to bend control flow of the program
to eventually gain control (by making their payload executable). Attackers are
able to perform such attacks by leveraging call-sites which rely on indirect
calls or return sites which rely on obtaining return address from stack memory.
To mitigate such attacks, risc-v extension zicfilp enforces that all indirect
calls must land on a landing pad instruction `lpad` else cpu will raise software
check exception (a new cpu exception cause code on riscv).
Similarly for return flow, risc-v extension zicfiss extends architecture with
- `sspush` instruction to push return address on a shadow stack
- `sspopchk` instruction to pop return address from shadow stack
and compare with input operand (i.e. return address on stack)
- `sspopchk` to raise software check exception if comparision above
was a mismatch
- Protection mechanism using which shadow stack is not writeable via
regular store instructions
More information an details can be found at extensions github repo [1].
Equivalent to landing pad (zicfilp) on x86 is `ENDBRANCH` instruction in Intel
CET [3] and branch target identification (BTI) [4] on arm.
Similarly x86's Intel CET has shadow stack [5] and arm64 has guarded control
stack (GCS) [6] which are very similar to risc-v's zicfiss shadow stack.
x86 and arm64 support for user mode shadow stack is already in mainline.
Kernel awareness for user control flow integrity
================================================
This series picks up Samuel Holland's envcfg changes [2] as well. So if those are
being applied independently, they should be removed from this series.
Enabling:
In order to maintain compatibility and not break anything in user mode, kernel
doesn't enable control flow integrity cpu extensions on binary by default.
Instead exposes a prctl interface to enable, disable and lock the shadow stack
or landing pad feature for a task. This allows userspace (loader) to enumerate
if all objects in its address space are compiled with shadow stack and landing
pad support and accordingly enable the feature. Additionally if a subsequent
`dlopen` happens on a library, user mode can take a decision again to disable
the feature (if incoming library is not compiled with support) OR terminate the
task (if user mode policy is strict to have all objects in address space to be
compiled with control flow integirty cpu feature). prctl to enable shadow stack
results in allocating shadow stack from virtual memory and activating for user
address space. x86 and arm64 are also following same direction due to similar
reason(s).
clone/fork:
On clone and fork, cfi state for task is inherited by child. Shadow stack is
part of virtual memory and is a writeable memory from kernel perspective
(writeable via a restricted set of instructions aka shadow stack instructions)
Thus kernel changes ensure that this memory is converted into read-only when
fork/clone happens and COWed when fault is taken due to sspush, sspopchk or
ssamoswap. In case `CLONE_VM` is specified and shadow stack is to be enabled,
kernel will automatically allocate a shadow stack for that clone call.
map_shadow_stack:
x86 introduced `map_shadow_stack` system call to allow user space to explicitly
map shadow stack memory in its address space. It is useful to allocate shadow
for different contexts managed by a single thread (green threads or contexts)
risc-v implements this system call as well.
signal management:
If shadow stack is enabled for a task, kernel performs an asynchronous control
flow diversion to deliver the signal and eventually expects userspace to issue
sigreturn so that original execution can be resumed. Even though resume context
is prepared by kernel, it is in user space memory and is subject to memory
corruption and corruption bugs can be utilized by attacker in this race window
to perform arbitrary sigreturn and eventually bypass cfi mechanism.
Another issue is how to ensure that cfi related state on sigcontext area is not
trampled by legacy apps or apps compiled with old kernel headers.
In order to mitigate control-flow hijacting, kernel prepares a token and place
it on shadow stack before signal delivery and places address of token in
sigcontext structure. During sigreturn, kernel obtains address of token from
sigcontext struture, reads token from shadow stack and validates it and only
then allow sigreturn to succeed. Compatiblity issue is solved by adopting
dynamic sigcontext management introduced for vector extension. This series
re-factor the code little bit to allow future sigcontext management easy (as
proposed by Andy Chiu from SiFive)
config and compilation:
Introduce a new risc-v config option `CONFIG_RISCV_USER_CFI`. Selecting this
config option picks the kernel support for user control flow integrity. This
optin is presented only if toolchain has shadow stack and landing pad support.
And is on purpose guarded by toolchain support. Reason being that eventually
vDSO also needs to be compiled in with shadow stack and landing pad support.
vDSO compile patches are not included as of now because landing pad labeling
scheme is yet to settle for usermode runtime.
To get more information on kernel interactions with respect to
zicfilp and zicfiss, patch series adds documentation for
`zicfilp` and `zicfiss` in following:
Documentation/arch/riscv/zicfiss.rst
Documentation/arch/riscv/zicfilp.rst
How to test this series
=======================
Toolchain
---------
$ git clone git@github.com:sifive/riscv-gnu-toolchain.git -b cfi-dev
$ riscv-gnu-toolchain/configure --prefix=<path-to-where-to-build> --with-arch=rv64gc_zicfilp_zicfiss --enable-linux --disable-gdb --with-extra-multilib-test="rv64gc_zicfilp_zicfiss-lp64d:-static"
$ make -j$(nproc)
Qemu
----
Get the lastest qemu
$ cd qemu
$ mkdir build
$ cd build
$ ../configure --target-list=riscv64-softmmu
$ make -j$(nproc)
Opensbi
-------
$ git clone git@github.com:deepak0414/opensbi.git -b v6_cfi_spec_split_opensbi
$ make CROSS_COMPILE=<your riscv toolchain> -j$(nproc) PLATFORM=generic
Linux
-----
Running defconfig is fine. CFI is enabled by default if the toolchain
supports it.
$ make ARCH=riscv CROSS_COMPILE=<path-to-cfi-riscv-gnu-toolchain>/build/bin/riscv64-unknown-linux-gnu- -j$(nproc) defconfig
$ make ARCH=riscv CROSS_COMPILE=<path-to-cfi-riscv-gnu-toolchain>/build/bin/riscv64-unknown-linux-gnu- -j$(nproc)
In case you're building your own rootfs using toolchain, please make sure you
pick following patch to ensure that vDSO compiled with lpad and shadow stack.
"arch/riscv: compile vdso with landing pad"
Branch where above patch can be picked
https://github.com/deepak0414/linux-riscv-cfi/tree/vdso_user_cfi_v6.12-rc1
Running
-------
Modify your qemu command to have:
-bios <path-to-cfi-opensbi>/build/platform/generic/firmware/fw_dynamic.bin
-cpu rv64,zicfilp=true,zicfiss=true,zimop=true,zcmop=true
vDSO related Opens (in the flux)
=================================
I am listing these opens for laying out plan and what to expect in future
patch sets. And of course for the sake of discussion.
Shadow stack and landing pad enabling in vDSO
----------------------------------------------
vDSO must have shadow stack and landing pad support compiled in for task
to have shadow stack and landing pad support. This patch series doesn't
enable that (yet). Enabling shadow stack support in vDSO should be
straight forward (intend to do that in next versions of patch set). Enabling
landing pad support in vDSO requires some collaboration with toolchain folks
to follow a single label scheme for all object binaries. This is necessary to
ensure that all indirect call-sites are setting correct label and target landing
pads are decorated with same label scheme.
How many vDSOs
---------------
Shadow stack instructions are carved out of zimop (may be operations) and if CPU
doesn't implement zimop, they're illegal instructions. Kernel could be running on
a CPU which may or may not implement zimop. And thus kernel will have to carry 2
different vDSOs and expose the appropriate one depending on whether CPU implements
zimop or not.
References
==========
[1] - https://github.com/riscv/riscv-cfi
[2] - https://lore.kernel.org/all/20240814081126.956287-1-samuel.holland@sifive.c…
[3] - https://lwn.net/Articles/889475/
[4] - https://developer.arm.com/documentation/109576/0100/Branch-Target-Identific…
[5] - https://www.intel.com/content/dam/develop/external/us/en/documents/catc17-i…
[6] - https://lwn.net/Articles/940403/
To: Thomas Gleixner <tglx(a)linutronix.de>
To: Ingo Molnar <mingo(a)redhat.com>
To: Borislav Petkov <bp(a)alien8.de>
To: Dave Hansen <dave.hansen(a)linux.intel.com>
To: x86(a)kernel.org
To: H. Peter Anvin <hpa(a)zytor.com>
To: Andrew Morton <akpm(a)linux-foundation.org>
To: Liam R. Howlett <Liam.Howlett(a)oracle.com>
To: Vlastimil Babka <vbabka(a)suse.cz>
To: Lorenzo Stoakes <lorenzo.stoakes(a)oracle.com>
To: Paul Walmsley <paul.walmsley(a)sifive.com>
To: Palmer Dabbelt <palmer(a)dabbelt.com>
To: Albert Ou <aou(a)eecs.berkeley.edu>
To: Conor Dooley <conor(a)kernel.org>
To: Rob Herring <robh(a)kernel.org>
To: Krzysztof Kozlowski <krzk+dt(a)kernel.org>
To: Arnd Bergmann <arnd(a)arndb.de>
To: Christian Brauner <brauner(a)kernel.org>
To: Peter Zijlstra <peterz(a)infradead.org>
To: Oleg Nesterov <oleg(a)redhat.com>
To: Eric Biederman <ebiederm(a)xmission.com>
To: Kees Cook <kees(a)kernel.org>
To: Jonathan Corbet <corbet(a)lwn.net>
To: Shuah Khan <shuah(a)kernel.org>
To: Jann Horn <jannh(a)google.com>
To: Conor Dooley <conor+dt(a)kernel.org>
To: Miguel Ojeda <ojeda(a)kernel.org>
To: Alex Gaynor <alex.gaynor(a)gmail.com>
To: Boqun Feng <boqun.feng(a)gmail.com>
To: Gary Guo <gary(a)garyguo.net>
To: Björn Roy Baron <bjorn3_gh(a)protonmail.com>
To: Benno Lossin <benno.lossin(a)proton.me>
To: Andreas Hindborg <a.hindborg(a)kernel.org>
To: Alice Ryhl <aliceryhl(a)google.com>
To: Trevor Gross <tmgross(a)umich.edu>
Cc: linux-kernel(a)vger.kernel.org
Cc: linux-fsdevel(a)vger.kernel.org
Cc: linux-mm(a)kvack.org
Cc: linux-riscv(a)lists.infradead.org
Cc: devicetree(a)vger.kernel.org
Cc: linux-arch(a)vger.kernel.org
Cc: linux-doc(a)vger.kernel.org
Cc: linux-kselftest(a)vger.kernel.org
Cc: alistair.francis(a)wdc.com
Cc: richard.henderson(a)linaro.org
Cc: jim.shu(a)sifive.com
Cc: andybnac(a)gmail.com
Cc: kito.cheng(a)sifive.com
Cc: charlie(a)rivosinc.com
Cc: atishp(a)rivosinc.com
Cc: evan(a)rivosinc.com
Cc: cleger(a)rivosinc.com
Cc: alexghiti(a)rivosinc.com
Cc: samitolvanen(a)google.com
Cc: broonie(a)kernel.org
Cc: rick.p.edgecombe(a)intel.com
Cc: rust-for-linux(a)vger.kernel.org
changelog
---------
v13:
- cpu_supports_shadow_stack/cpu_supports_indirect_br_lp_instr uses
riscv_has_extension_unlikely()
- uses nops(count) to create nop slide
- RISCV_ACQUIRE_BARRIER is not needed in `amo_user_shstk`. Removed it
- changed ternaries to simply use implicit casting to convert to bool.
- kernel command line allows to disable zicfilp and zicfiss independently.
updated kernel-parameters.txt.
- ptrace user abi for cfi uses bitmasks instead of bitfields. Added ptrace
kselftest.
- cosmetic and grammatical changes to documentation.
v12:
- It seems like I had accidently squashed arch agnostic indirect branch
tracking prctl and riscv implementation of those prctls. Split them again.
- set_shstk_status/set_indir_lp_status perform CSR writes only when CPU
support is available. As suggested by Zong Li.
- Some minor clean up in kselftests as suggested by Zong Li.
v11:
- patch "arch/riscv: compile vdso with landing pad" was unconditionally
selecting `_zicfilp` for vDSO compile. fixed that. Changed `lpad 1` to
to `lpad 0`.
v10:
- dropped "mm: helper `is_shadow_stack_vma` to check shadow stack vma". This patch
is not that interesting to this patch series for risc-v. There are instances in
arch directories where VM_SHADOW_STACK flag is anyways used. Dropping this patch
to expedite merging in riscv tree.
- Took suggestions from `Clement` on "riscv: zicfiss / zicfilp enumeration" to
validate presence of cfi based on config.
- Added a patch for vDSO to have `lpad 0`. I had omitted this earlier to make sure
we add single vdso object with cfi enabled. But a vdso object with scheme of
zero labeled landing pad is least common denominator and should work with all
objects of zero labeled as well as function-signature labeled objects.
v9:
- rebased on master (39a803b754d5 fix braino in "9p: fix ->rename_sem exclusion")
- dropped "mm: Introduce ARCH_HAS_USER_SHADOW_STACK" (master has it from arm64/gcs)
- dropped "prctl: arch-agnostic prctl for shadow stack" (master has it from arm64/gcs)
v8:
- rebased on palmer/for-next
- dropped samuel holland's `envcfg` context switch patches.
they are in parlmer/for-next
v7:
- Removed "riscv/Kconfig: enable HAVE_EXIT_THREAD for riscv"
Instead using `deactivate_mm` flow to clean up.
see here for more context
https://lore.kernel.org/all/20230908203655.543765-1-rick.p.edgecombe@intel.…
- Changed the header include in `kselftest`. Hopefully this fixes compile
issue faced by Zong Li at SiFive.
- Cleaned up an orphaned change to `mm/mmap.c` in below patch
"riscv/mm : ensure PROT_WRITE leads to VM_READ | VM_WRITE"
- Lock interfaces for shadow stack and indirect branch tracking expect arg == 0
Any future evolution of this interface should accordingly define how arg should
be setup.
- `mm/map.c` has an instance of using `VM_SHADOW_STACK`. Fixed it to use helper
`is_shadow_stack_vma`.
- Link to v6: https://lore.kernel.org/r/20241008-v5_user_cfi_series-v6-0-60d9fe073f37@riv…
v6:
- Picked up Samuel Holland's changes as is with `envcfg` placed in
`thread` instead of `thread_info`
- fixed unaligned newline escapes in kselftest
- cleaned up messages in kselftest and included test output in commit message
- fixed a bug in clone path reported by Zong Li
- fixed a build issue if CONFIG_RISCV_ISA_V is not selected
(this was introduced due to re-factoring signal context
management code)
v5:
- rebased on v6.12-rc1
- Fixed schema related issues in device tree file
- Fixed some of the documentation related issues in zicfilp/ss.rst
(style issues and added index)
- added `SHADOW_STACK_SET_MARKER` so that implementation can define base
of shadow stack.
- Fixed warnings on definitions added in usercfi.h when
CONFIG_RISCV_USER_CFI is not selected.
- Adopted context header based signal handling as proposed by Andy Chiu
- Added support for enabling kernel mode access to shadow stack using
FWFT
(https://github.com/riscv-non-isa/riscv-sbi-doc/blob/master/src/ext-firmware…)
- Link to v5: https://lore.kernel.org/r/20241001-v5_user_cfi_series-v1-0-3ba65b6e550f@riv…
(Note: I had an issue in my workflow due to which version number wasn't
picked up correctly while sending out patches)
v4:
- rebased on 6.11-rc6
- envcfg: Converged with Samuel Holland's patches for envcfg management on per-
thread basis.
- vma_is_shadow_stack is renamed to is_vma_shadow_stack
- picked up Mark Brown's `ARCH_HAS_USER_SHADOW_STACK` patch
- signal context: using extended context management to maintain compatibility.
- fixed `-Wmissing-prototypes` compiler warnings for prctl functions
- Documentation fixes and amending typos.
- Link to v4: https://lore.kernel.org/all/20240912231650.3740732-1-debug@rivosinc.com/
v3:
- envcfg
logic to pick up base envcfg had a bug where `ENVCFG_CBZE` could have been
picked on per task basis, even though CPU didn't implement it. Fixed in
this series.
- dt-bindings
As suggested, split into separate commit. fixed the messaging that spec is
in public review
- arch_is_shadow_stack change
arch_is_shadow_stack changed to vma_is_shadow_stack
- hwprobe
zicfiss / zicfilp if present will get enumerated in hwprobe
- selftests
As suggested, added object and binary filenames to .gitignore
Selftest binary anyways need to be compiled with cfi enabled compiler which
will make sure that landing pad and shadow stack are enabled. Thus removed
separate enable/disable tests. Cleaned up tests a bit.
- Link to v3: https://lore.kernel.org/lkml/20240403234054.2020347-1-debug@rivosinc.com/
v2:
- Using config `CONFIG_RISCV_USER_CFI`, kernel support for riscv control flow
integrity for user mode programs can be compiled in the kernel.
- Enabling of control flow integrity for user programs is left to user runtime
- This patch series introduces arch agnostic `prctls` to enable shadow stack
and indirect branch tracking. And implements them on riscv.
---
Changes in v13:
- changelog posted just below cover letter
- Link to v12: https://lore.kernel.org/r/20250314-v5_user_cfi_series-v12-0-e51202b53138@ri…
Changes in v12:
- changelog posted just below cover letter
- Link to v11: https://lore.kernel.org/r/20250310-v5_user_cfi_series-v11-0-86b36cbfb910@ri…
Changes in v11:
- changelog posted just below cover letter
- Link to v10: https://lore.kernel.org/r/20250210-v5_user_cfi_series-v10-0-163dcfa31c60@ri…
---
Andy Chiu (1):
riscv: signal: abstract header saving for setup_sigcontext
Clément Léger (1):
riscv: Add Firmware Feature SBI extensions definitions
Deepak Gupta (25):
mm: VM_SHADOW_STACK definition for riscv
dt-bindings: riscv: zicfilp and zicfiss in dt-bindings (extensions.yaml)
riscv: zicfiss / zicfilp enumeration
riscv: zicfiss / zicfilp extension csr and bit definitions
riscv: usercfi state for task and save/restore of CSR_SSP on trap entry/exit
riscv/mm : ensure PROT_WRITE leads to VM_READ | VM_WRITE
riscv mm: manufacture shadow stack pte
riscv mmu: teach pte_mkwrite to manufacture shadow stack PTEs
riscv mmu: write protect and shadow stack
riscv/mm: Implement map_shadow_stack() syscall
riscv/shstk: If needed allocate a new shadow stack on clone
riscv: Implements arch agnostic shadow stack prctls
prctl: arch-agnostic prctl for indirect branch tracking
riscv: Implements arch agnostic indirect branch tracking prctls
riscv/traps: Introduce software check exception
riscv/signal: save and restore of shadow stack for signal
riscv/kernel: update __show_regs to print shadow stack register
riscv/ptrace: riscv cfi status and state via ptrace and in core files
riscv/hwprobe: zicfilp / zicfiss enumeration in hwprobe
riscv: kernel command line option to opt out of user cfi
riscv: enable kernel access to shadow stack memory via FWFT sbi call
riscv: create a config for shadow stack and landing pad instr support
riscv: Documentation for landing pad / indirect branch tracking
riscv: Documentation for shadow stack on riscv
kselftest/riscv: kselftest for user mode cfi
Jim Shu (1):
arch/riscv: compile vdso with landing pad
Documentation/admin-guide/kernel-parameters.txt | 8 +
Documentation/arch/riscv/index.rst | 2 +
Documentation/arch/riscv/zicfilp.rst | 115 +++++
Documentation/arch/riscv/zicfiss.rst | 179 +++++++
.../devicetree/bindings/riscv/extensions.yaml | 14 +
arch/riscv/Kconfig | 20 +
arch/riscv/Makefile | 5 +-
arch/riscv/include/asm/asm-prototypes.h | 1 +
arch/riscv/include/asm/assembler.h | 44 ++
arch/riscv/include/asm/cpufeature.h | 12 +
arch/riscv/include/asm/csr.h | 16 +
arch/riscv/include/asm/entry-common.h | 2 +
arch/riscv/include/asm/hwcap.h | 2 +
arch/riscv/include/asm/mman.h | 25 +
arch/riscv/include/asm/mmu_context.h | 7 +
arch/riscv/include/asm/pgtable.h | 30 +-
arch/riscv/include/asm/processor.h | 2 +
arch/riscv/include/asm/sbi.h | 26 +
arch/riscv/include/asm/thread_info.h | 3 +
arch/riscv/include/asm/usercfi.h | 96 ++++
arch/riscv/include/asm/vector.h | 3 +
arch/riscv/include/uapi/asm/hwprobe.h | 2 +
arch/riscv/include/uapi/asm/ptrace.h | 34 ++
arch/riscv/include/uapi/asm/sigcontext.h | 1 +
arch/riscv/kernel/Makefile | 1 +
arch/riscv/kernel/asm-offsets.c | 8 +
arch/riscv/kernel/cpufeature.c | 13 +
arch/riscv/kernel/entry.S | 28 +-
arch/riscv/kernel/head.S | 23 +
arch/riscv/kernel/process.c | 26 +-
arch/riscv/kernel/ptrace.c | 95 ++++
arch/riscv/kernel/signal.c | 142 +++++-
arch/riscv/kernel/sys_hwprobe.c | 2 +
arch/riscv/kernel/sys_riscv.c | 10 +
arch/riscv/kernel/traps.c | 43 ++
arch/riscv/kernel/usercfi.c | 545 +++++++++++++++++++++
arch/riscv/kernel/vdso/Makefile | 6 +
arch/riscv/kernel/vdso/flush_icache.S | 4 +
arch/riscv/kernel/vdso/getcpu.S | 4 +
arch/riscv/kernel/vdso/rt_sigreturn.S | 4 +
arch/riscv/kernel/vdso/sys_hwprobe.S | 4 +
arch/riscv/mm/init.c | 2 +-
arch/riscv/mm/pgtable.c | 17 +
include/linux/cpu.h | 4 +
include/linux/mm.h | 7 +
include/uapi/linux/elf.h | 1 +
include/uapi/linux/prctl.h | 27 +
kernel/sys.c | 30 ++
tools/testing/selftests/riscv/Makefile | 2 +-
tools/testing/selftests/riscv/cfi/.gitignore | 3 +
tools/testing/selftests/riscv/cfi/Makefile | 10 +
tools/testing/selftests/riscv/cfi/cfi_rv_test.h | 82 ++++
tools/testing/selftests/riscv/cfi/riscv_cfi_test.c | 171 +++++++
tools/testing/selftests/riscv/cfi/shadowstack.c | 385 +++++++++++++++
tools/testing/selftests/riscv/cfi/shadowstack.h | 27 +
55 files changed, 2346 insertions(+), 29 deletions(-)
---
base-commit: 39a803b754d5224a3522016b564113ee1e4091b2
change-id: 20240930-v5_user_cfi_series-3dc332f8f5b2
--
- debug
6 months
- 2
- 31
[PATCH v1 00/16] iommufd: Add vIOMMU infrastructure (Part-4 vCMDQ)
by Nicolin Chen
The vIOMMU object is designed to represent a slice of an IOMMU HW for its
virtualization features shared with or passed to user space (a VM mostly)
in a way of HW acceleration. This extended the HWPT-based design for more
advanced virtualization feature.
A vCMDQ introduced by this series as a part of the vIOMMU infrastructure
represents a HW supported queue/buffer for VM to use exclusively, e.g.
- NVIDIA's virtual command queue
- AMD vIOMMU's command buffer
either of which is an IOMMU HW feature to directly load and execute cache
invalidation commands issued by a guest kernel, to shoot down TLB entries
that HW cached for guest-owned stage-1 page table entries. This is a big
improvement since there is no VM Exit during an invalidation, compared to
the traditional invalidation pathway by trapping a guest-own invalidation
queue and forwarding those commands/requests to the host kernel that will
eventually fill a HW-owned queue to execute those commands.
Thus, a vCMDQ object, as an initial use case, is all about a guest-owned
HW command queue that VMM can allocate/configure depending on the request
from a guest kernel. Introduce a new IOMMUFD_OBJ_VCMDQ and its allocator
IOMMUFD_CMD_VCMDQ_ALLOC allowing VMM to forward the IOMMU-specific queue
info, such as queue base address, size, and etc.
Meanwhile, a guest-owned command queue needs the kernel (a command queue
driver) to control the queue by reading/writing its consumer and producer
indexes, which means the command queue HW allows the guest kernel to get
a direct R/W access to those registers. Introduce an mmap infrastructure
to the iommufd core so as to support pass through a piece of MMIO region
from the host physical address space to the guest physical address space.
The VMA info (vm_pgoff/size) used by an mmap must be pre-allocated during
the IOMMUFD_CMD_VCMDQ_ALLOC and given those info to the user space as an
output driver-data by the IOMMUFD_CMD_VCMDQ_ALLOC. So, this requires a
driver-specific user data support by a vIOMMU object.
As a real-world use case, this series implements a vCMDQ support to the
tegra241-cmdqv driver for the vCMDQ on NVIDIA Grace CPU. In another word,
this is also the Tegra CMDQV series Part-2 (user-space support), reworked
from Previous RFCv1:
https://lore.kernel.org/all/cover.1712978212.git.nicolinc@nvidia.com/
This is on Github:
https://github.com/nicolinc/iommufd/commits/iommufd_vcmdq-v1
Paring QEMU branch for testing:
https://github.com/nicolinc/qemu/commits/wip/for_iommufd_vcmdq-v1
Thanks
Nicolin
Nicolin Chen (16):
iommu: Pass in a driver-level user data structure to viommu_alloc op
iommufd/viommu: Allow driver-specific user data for a vIOMMU object
iommu: Add iommu_copy_struct_to_user helper
iommufd: Add iommufd_struct_destroy to revert iommufd_viommu_alloc
iommufd/selftest: Support user_data in mock_viommu_alloc
iommufd/selftest: Add covearge for viommu data
iommufd/viommu: Add driver-allocated vDEVICE support
iommufd/viommu: Introduce IOMMUFD_OBJ_VCMDQ and its related struct
iommufd/viommmu: Add IOMMUFD_CMD_VCMDQ_ALLOC ioctl
iommufd: Add mmap interface
iommufd/selftest: Add coverage for the new mmap interface
Documentation: userspace-api: iommufd: Update vCMDQ
iommu/tegra241-cmdqv: Use request_threaded_irq
iommu/arm-smmu-v3: Add vsmmu_alloc impl op
iommu/tegra241-cmdqv: Add user-space use support
iommu/tegra241-cmdqv: Add IOMMU_VEVENTQ_TYPE_TEGRA241_CMDQV support
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 24 +-
drivers/iommu/iommufd/iommufd_private.h | 20 +-
drivers/iommu/iommufd/iommufd_test.h | 17 +
include/linux/iommu.h | 43 ++-
include/linux/iommufd.h | 93 +++++
include/uapi/linux/iommufd.h | 87 +++++
tools/testing/selftests/iommu/iommufd_utils.h | 21 +-
.../arm/arm-smmu-v3/arm-smmu-v3-iommufd.c | 26 +-
.../iommu/arm/arm-smmu-v3/tegra241-cmdqv.c | 349 +++++++++++++++++-
drivers/iommu/iommufd/driver.c | 54 +++
drivers/iommu/iommufd/main.c | 54 ++-
drivers/iommu/iommufd/selftest.c | 58 ++-
drivers/iommu/iommufd/viommu.c | 78 +++-
tools/testing/selftests/iommu/iommufd.c | 34 +-
.../selftests/iommu/iommufd_fail_nth.c | 5 +-
Documentation/userspace-api/iommufd.rst | 11 +
16 files changed, 912 insertions(+), 62 deletions(-)
--
2.43.0
6 months
- 6
- 51