September 2022 - Linux-kselftest-mirror

[PATCH v3] ksefltests: pidfd: Fix wait_states: Test terminated by timeout

by Li Zhijian

0Day/LKP observed that the kselftest blocks forever since one of the pidfd_wait doesn't terminate in 1 of 30 runs. After digging into the source, we found that it blocks at: ASSERT_EQ(sys_waitid(P_PIDFD, pidfd, &info, WCONTINUED, NULL), 0); wait_states has below testing flow: CHILD PARENT ---------------+-------------- 1 STOP itself 2 WAIT for CHILD STOPPED 3 SIGNAL CHILD to CONT 4 CONT 5 STOP itself 5' WAIT for CHILD CONT 6 WAIT for CHILD STOPPED The problem is that the kernel cannot ensure the order of 5 and 5', once 5 goes first, the test will fail. we can reproduce it by: $ while true; do make run_tests -C pidfd; done Introduce a blocking read in child process to make sure the parent can check its WCONTINUED. CC: Philip Li <philip.li(a)intel.com> Reported-by: kernel test robot <lkp(a)intel.com> Signed-off-by: Li Zhijian <lizhijian(a)fujitsu.com> Reviewed-by: Christian Brauner (Microsoft) <brauner(a)kernel.org> --- I have almost forgotten this patch since the former version post over 6 months ago. This time I just do a rebase and update the comments. V3: fixes description and add review tag V2: rewrite with pipe to avoid usleep --- tools/testing/selftests/pidfd/pidfd_wait.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/tools/testing/selftests/pidfd/pidfd_wait.c b/tools/testing/selftests/pidfd/pidfd_wait.c index 070c1c876df1..c3e2a3041f55 100644 --- a/tools/testing/selftests/pidfd/pidfd_wait.c +++ b/tools/testing/selftests/pidfd/pidfd_wait.c @@ -95,20 +95,28 @@ static int sys_waitid(int which, pid_t pid, siginfo_t *info, int options, .flags = CLONE_PIDFD | CLONE_PARENT_SETTID, .exit_signal = SIGCHLD, }; + int pfd[2]; pid_t pid; siginfo_t info = { .si_signo = 0, }; + ASSERT_EQ(pipe(pfd), 0); pid = sys_clone3(&args); ASSERT_GE(pid, 0); if (pid == 0) { + char buf[2]; + + close(pfd[1]); kill(getpid(), SIGSTOP); + ASSERT_EQ(read(pfd[0], buf, 1), 1); + close(pfd[0]); kill(getpid(), SIGSTOP); exit(EXIT_SUCCESS); } + close(pfd[0]); ASSERT_EQ(sys_waitid(P_PIDFD, pidfd, &info, WSTOPPED, NULL), 0); ASSERT_EQ(info.si_signo, SIGCHLD); ASSERT_EQ(info.si_code, CLD_STOPPED); @@ -117,6 +125,8 @@ static int sys_waitid(int which, pid_t pid, siginfo_t *info, int options, ASSERT_EQ(sys_pidfd_send_signal(pidfd, SIGCONT, NULL, 0), 0); ASSERT_EQ(sys_waitid(P_PIDFD, pidfd, &info, WCONTINUED, NULL), 0); + ASSERT_EQ(write(pfd[1], "C", 1), 1); + close(pfd[1]); ASSERT_EQ(info.si_signo, SIGCHLD); ASSERT_EQ(info.si_code, CLD_CONTINUED); ASSERT_EQ(info.si_pid, parent_tid); -- 1.8.3.1

2 years, 2 months

2
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[PATCH v2] selftests: pidfd: Fix compling warnings

by Li Zhijian

Fix warnings and enable Wall. pidfd_wait.c: In function ‘wait_nonblock’: pidfd_wait.c:150:13: warning: unused variable ‘status’ [-Wunused-variable] 150 | int pidfd, status = 0; | ^~~~~~ ... pidfd_test.c: In function ‘child_poll_exec_test’: pidfd_test.c:438:1: warning: no return statement in function returning non-void [-Wreturn-type] 438 | } | ^ Signed-off-by: Li Zhijian <lizhijian(a)fujitsu.com> v2: fix mistake assignment to pidfd --- tools/testing/selftests/pidfd/Makefile | 2 +- tools/testing/selftests/pidfd/pidfd_test.c | 2 ++ tools/testing/selftests/pidfd/pidfd_wait.c | 2 +- 3 files changed, 4 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/pidfd/Makefile b/tools/testing/selftests/pidfd/Makefile index f4a2f28f926b..778b6cdc8aed 100644 --- a/tools/testing/selftests/pidfd/Makefile +++ b/tools/testing/selftests/pidfd/Makefile @@ -1,5 +1,5 @@ # SPDX-License-Identifier: GPL-2.0-only -CFLAGS += -g -I../../../../usr/include/ -pthread +CFLAGS += -g -I../../../../usr/include/ -pthread -Wall TEST_GEN_PROGS := pidfd_test pidfd_fdinfo_test pidfd_open_test \ pidfd_poll_test pidfd_wait pidfd_getfd_test pidfd_setns_test diff --git a/tools/testing/selftests/pidfd/pidfd_test.c b/tools/testing/selftests/pidfd/pidfd_test.c index 9a2d64901d59..d36654265b7a 100644 --- a/tools/testing/selftests/pidfd/pidfd_test.c +++ b/tools/testing/selftests/pidfd/pidfd_test.c @@ -435,6 +435,8 @@ static int child_poll_exec_test(void *args) */ while (1) sleep(1); + + return 0; } static void test_pidfd_poll_exec(int use_waitpid) diff --git a/tools/testing/selftests/pidfd/pidfd_wait.c b/tools/testing/selftests/pidfd/pidfd_wait.c index c3e2a3041f55..0dcb8365ddc3 100644 --- a/tools/testing/selftests/pidfd/pidfd_wait.c +++ b/tools/testing/selftests/pidfd/pidfd_wait.c @@ -148,7 +148,7 @@ static int sys_waitid(int which, pid_t pid, siginfo_t *info, int options, TEST(wait_nonblock) { - int pidfd, status = 0; + int pidfd; unsigned int flags = 0; pid_t parent_tid = -1; struct clone_args args = { -- 1.8.3.1

2 years, 2 months

2
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[PATCH v9 0/9] x86: Show in sysfs if a memory node is able to do encryption

by Martin Fernandez

Show for each node if every memory descriptor in that node has the EFI_MEMORY_CPU_CRYPTO attribute. fwupd project plans to use it as part of a check to see if the users have properly configured memory hardware encryption capabilities. fwupd's people have seen cases where it seems like there is memory encryption because all the hardware is capable of doing it, but on a closer look there is not, either because of system firmware or because some component requires updating to enable the feature. The MKTME/TME spec says that it will only encrypt those memory regions which are flagged with the EFI_MEMORY_CPU_CRYPTO attribute. If all nodes are capable of encryption and if the system have tme/sme on we can pretty confidently say that the device is actively encrypting all its memory. It's planned to make this check part of an specification that can be passed to people purchasing hardware These checks will run at every boot. The specification is called Host Security ID: https://fwupd.github.io/libfwupdplugin/hsi.html. We choosed to do it a per-node basis because although an ABI that shows that the whole system memory is capable of encryption would be useful for the fwupd use case, doing it in a per-node basis would make the path easier to give the capability to the user to target allocations from applications to NUMA nodes which have encryption capabilities in the future. Changes since v8: Add unit tests to e820_range_* functions Changes since v7: Less kerneldocs Less verbosity in the e820 code Changes since v6: Fixes in __e820__handle_range_update Const correctness in e820.c Correct alignment in memblock.h Rework memblock_overlaps_region Changes since v5: Refactor e820__range_{update, remove, set_crypto_capable} in order to avoid code duplication. Warn the user when a node has both encryptable and non-encryptable regions. Check that e820_table has enough size to store both current e820_table and EFI memmap. Changes since v4: Add enum to represent the cryptographic capabilities in e820: e820_crypto_capabilities. Revert __e820__range_update, only adding the new argument for __e820__range_add about crypto capabilities. Add a function __e820__range_update_crypto similar to __e820__range_update but to only update this new field. Changes since v3: Update date in Doc/ABI file. More information about the fwupd usecase and the rationale behind doing it in a per-NUMA-node. Changes since v2: e820__range_mark_crypto -> e820__range_mark_crypto_capable. In e820__range_remove: Create a region with crypto capabilities instead of creating one without it and then mark it. Changes since v1: Modify __e820__range_update to update the crypto capabilities of a range; now this function will change the crypto capability of a range if it's called with the same old_type and new_type. Rework efi_mark_e820_regions_as_crypto_capable based on this. Update do_add_efi_memmap to mark the regions as it creates them. Change the type of crypto_capable in e820_entry from bool to u8. Fix e820__update_table changes. Remove memblock_add_crypto_capable. Now you have to add the region and mark it then. Better place for crypto_capable in pglist_data. Martin Fernandez (9): mm/memblock: Tag memblocks with crypto capabilities mm/mmzone: Tag pg_data_t with crypto capabilities x86/e820: Add infrastructure to refactor e820__range_{update,remove} x86/e820: Refactor __e820__range_update x86/e820: Refactor e820__range_remove x86/e820: Tag e820_entry with crypto capabilities x86/e820: Add unit tests for e820_range_* functions x86/efi: Mark e820_entries as crypto capable from EFI memmap drivers/node: Show in sysfs node's crypto capabilities Documentation/ABI/testing/sysfs-devices-node | 10 + arch/x86/Kconfig.debug | 10 + arch/x86/include/asm/e820/api.h | 1 + arch/x86/include/asm/e820/types.h | 12 +- arch/x86/kernel/e820.c | 393 ++++++++++++++----- arch/x86/kernel/e820_test.c | 249 ++++++++++++ arch/x86/platform/efi/efi.c | 37 ++ drivers/base/node.c | 10 + include/linux/memblock.h | 5 + include/linux/mmzone.h | 3 + mm/memblock.c | 62 +++ mm/page_alloc.c | 1 + 12 files changed, 695 insertions(+), 98 deletions(-) create mode 100644 Documentation/ABI/testing/sysfs-devices-node create mode 100644 arch/x86/kernel/e820_test.c -- 2.30.2

2 years, 2 months

6
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[PATCH v1 0/7] selftests/vm: test COW handling of anonymous memory

by David Hildenbrand

On top of mm-stable. This is my current set of tests for testing COW handling of anonymous memory, especially when interacting with GUP. I developed these tests while working on PageAnonExclusive and managed to clean them up just now. On current upstream Linux, all tests pass except the hugetlb tests that rely on vmsplice -- these tests should pass as soon as vmsplice properly uses FOLL_PIN instead of FOLL_GET. I'm working on additional tests for COW handling in private mappings, focusing on long-term R/O pinning e.g., of the shared zeropage, pagecache pages and KSM pages. These tests, however, will go into a different file. So this is everything I have regarding tests for anonymous memory. Cc: Andrew Morton <akpm(a)linux-foundation.org> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Jason Gunthorpe <jgg(a)nvidia.com> Cc: John Hubbard <jhubbard(a)nvidia.com> Cc: Nadav Amit <namit(a)vmware.com> Cc: Peter Xu <peterx(a)redhat.com> Cc: Andrea Arcangeli <aarcange(a)redhat.com> Cc: Vlastimil Babka <vbabka(a)suse.cz> Cc: Mike Rapoport <rppt(a)kernel.org> Cc: Christoph von Recklinghausen <crecklin(a)redhat.com> Cc: Don Dutile <ddutile(a)redhat.com> David Hildenbrand (7): selftests/vm: anon_cow: test COW handling of anonymous memory selftests/vm: factor out pagemap_is_populated() into vm_util selftests/vm: anon_cow: THP tests selftests/vm: anon_cow: hugetlb tests selftests/vm: anon_cow: add liburing test cases mm/gup_test: start/stop/read functionality for PIN LONGTERM test selftests/vm: anon_cow: add R/O longterm tests via gup_test mm/gup_test.c | 140 +++ mm/gup_test.h | 12 + tools/testing/selftests/vm/.gitignore | 1 + tools/testing/selftests/vm/Makefile | 25 +- tools/testing/selftests/vm/anon_cow.c | 1126 ++++++++++++++++++++ tools/testing/selftests/vm/check_config.sh | 31 + tools/testing/selftests/vm/madv_populate.c | 8 - tools/testing/selftests/vm/run_vmtests.sh | 3 + tools/testing/selftests/vm/vm_util.c | 15 + tools/testing/selftests/vm/vm_util.h | 2 + 10 files changed, 1353 insertions(+), 10 deletions(-) create mode 100644 tools/testing/selftests/vm/anon_cow.c create mode 100644 tools/testing/selftests/vm/check_config.sh -- 2.37.3

2 years, 2 months

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[PATCH v1 0/7] mm/ksm: break_ksm() cleanups and fixes

by David Hildenbrand

This series cleans up and fixes break_ksm(). In summary, we no longer use fake write faults to break COW but instead FAULT_FLAG_UNSHARE. Further, we move away from using follow_page() [that we can hopefully remove completely at one point] and use new walk_page_range_vma() instead. Fortunately, we can get rid of VM_FAULT_WRITE and FOLL_MIGRATION in common code now. Add a selftest to measure MADV_UNMERGEABLE performance. In my setup (AMD Ryzen 9 3900X), running the KSM selftest to test unmerge performance on 2 GiB (taskset 0x8 ./ksm_tests -D -s 2048), this results in a performance degradation of ~8% -- 9% (old: ~5250 MiB/s, new: ~4800 MiB/s). I don't think we particularly care for now, but it's good to be aware of the implication. Cc: Andrew Morton <akpm(a)linux-foundation.org> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Hugh Dickins <hughd(a)google.com> Cc: Vlastimil Babka <vbabka(a)suse.cz> Cc: Peter Xu <peterx(a)redhat.com> Cc: Andrea Arcangeli <aarcange(a)redhat.com> Cc: "Matthew Wilcox (Oracle)" <willy(a)infradead.org> Cc: Jason Gunthorpe <jgg(a)nvidia.com> Cc: John Hubbard <jhubbard(a)nvidia.com> David Hildenbrand (7): selftests/vm: add test to measure MADV_UNMERGEABLE performance mm/ksm: simplify break_ksm() to not rely on VM_FAULT_WRITE mm: remove VM_FAULT_WRITE mm/ksm: fix KSM COW breaking with userfaultfd-wp via FAULT_FLAG_UNSHARE mm/pagewalk: add walk_page_range_vma() mm/ksm: convert break_ksm() to use walk_page_range_vma() mm/gup: remove FOLL_MIGRATION include/linux/mm.h | 1 - include/linux/mm_types.h | 3 - include/linux/pagewalk.h | 3 + mm/gup.c | 55 ++----------- mm/huge_memory.c | 2 +- mm/ksm.c | 103 +++++++++++++++++++------ mm/memory.c | 9 +-- mm/pagewalk.c | 27 +++++++ tools/testing/selftests/vm/ksm_tests.c | 76 +++++++++++++++++- 9 files changed, 192 insertions(+), 87 deletions(-) -- 2.37.3

2 years, 2 months

3
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[PATCH v1] selftests: Use optional USERCFLAGS and USERLDFLAGS

by Mickaël Salaün

This change enables to extend CFLAGS and LDFLAGS from command line, e.g. to extend compiler checks: make USERCFLAGS=-Werror USERLDFLAGS=-static USERCFLAGS and USERLDFLAGS are documented in Documentation/kbuild/makefiles.rst and Documentation/kbuild/kbuild.rst This should be backported (down to 5.10) to improve previous kernel versions testing as well. Cc: Shuah Khan <skhan(a)linuxfoundation.org> Cc: stable(a)vger.kernel.org Signed-off-by: Mickaël Salaün <mic(a)digikod.net> Link: https://lore.kernel.org/r/20220909103901.1503436-1-mic@digikod.net --- tools/testing/selftests/lib.mk | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk index d44c72b3abe3..da47a0257165 100644 --- a/tools/testing/selftests/lib.mk +++ b/tools/testing/selftests/lib.mk @@ -119,6 +119,11 @@ endef clean: $(CLEAN) +# Enables to extend CFLAGS and LDFLAGS from command line, e.g. +# make USERCFLAGS=-Werror USERLDFLAGS=-static +CFLAGS += $(USERCFLAGS) +LDFLAGS += $(USERLDFLAGS) + # When make O= with kselftest target from main level # the following aren't defined. # base-commit: 7e18e42e4b280c85b76967a9106a13ca61c16179 -- 2.37.2

2 years, 2 months

2
2
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[PATCH v3 0/4] Implement IOCTL to get and clear soft dirty PTE

by Muhammad Usama Anjum

Hello, This patch series implements a new ioctl on the pagemap proc fs file to get, clear and perform both get and clear at the same time atomically on the specified range of the memory. Soft-dirty PTE bit of the memory pages can be viewed by using pagemap procfs file. The soft-dirty PTE bit for the whole memory range of the process can be cleared by writing to the clear_refs file. This series adds features that weren't present earlier. - There is no atomic get soft-dirty PTE bit status and clear operation present. - The soft-dirty PTE bit of only a part of memory cannot be cleared. Historically, soft-dirty PTE bit tracking has been used in the CRIU project. The proc fs interface is enough for that as I think the process is frozen. We have the use case where we need to track the soft-dirty PTE bit for the running processes. We need this tracking and clear mechanism of a region of memory while the process is running to emulate the getWriteWatch() syscall of Windows. This syscall is used by games to keep track of dirty pages and keep processing only the dirty pages. This new ioctl can be used by the CRIU project and other applications which require soft-dirty PTE bit information. As in the current kernel there is no way to clear a part of memory (instead of clearing the Soft-Dirty bits for the entire process) and get+clear operation cannot be performed atomically, there are other methods to mimic this information entirely in userspace with poor performance: - The mprotect syscall and SIGSEGV handler for bookkeeping - The userfaultfd syscall with the handler for bookkeeping Some benchmarks can be seen [1]. This ioctl can be used by the CRIU project and other applications which require soft-dirty PTE bit information. The following operations are supported in this ioctl: - Get the pages that are soft-dirty. - Clear the pages which are soft-dirty. - The optional flag to ignore the VM_SOFTDIRTY and only track per page soft-dirty PTE bit There are two decisions which have been taken about how to get the output from the syscall. - Return offsets of the pages from the start in the vec - Stop execution when vec is filled with dirty pages These two arguments doesn't follow the mincore() philosophy where the output array corresponds to the address range in one to one fashion, hence the output buffer length isn't passed and only a flag is set if the page is present. This makes mincore() easy to use with less control. We are passing the size of the output array and putting return data consecutively which is offset of dirty pages from the start. The user can convert these offsets back into the dirty page addresses easily. Suppose, the user want to get first 10 dirty pages from a total memory of 100 pages. He'll allocate output buffer of size 10 and the ioctl will abort after finding the 10 pages. This behaviour is needed to support Windows' getWriteWatch(). The behaviour like mincore() can be achieved by passing output buffer of 100 size. This interface can be used for any desired behaviour. [1] https://lore.kernel.org/lkml/54d4c322-cd6e-eefd-b161-2af2b56aae24@collabora… Regards, Muhammad Usama Anjum Muhammad Usama Anjum (4): fs/proc/task_mmu: update functions to clear the soft-dirty PTE bit fs/proc/task_mmu: Implement IOCTL to get and clear soft dirty PTE bit selftests: vm: add pagemap ioctl tests mm: add documentation of the new ioctl on pagemap Documentation/admin-guide/mm/soft-dirty.rst | 42 +- fs/proc/task_mmu.c | 342 ++++++++++- include/uapi/linux/fs.h | 23 + tools/include/uapi/linux/fs.h | 23 + tools/testing/selftests/vm/.gitignore | 1 + tools/testing/selftests/vm/Makefile | 2 + tools/testing/selftests/vm/pagemap_ioctl.c | 649 ++++++++++++++++++++ 7 files changed, 1050 insertions(+), 32 deletions(-) create mode 100644 tools/testing/selftests/vm/pagemap_ioctl.c -- 2.30.2

2 years, 2 months

6
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[RFC V3 PATCH 0/6] selftests: KVM: selftests for fd-based private memory

by Vishal Annapurve

This v3 series implements selftests targeting the feature floated by Chao via: https://lore.kernel.org/linux-mm/20220706082016.2603916-12-chao.p.peng@linu… Below changes aim to test the fd based approach for guest private memory in context of normal (non-confidential) VMs executing on non-confidential platforms. private_mem_test.c file adds selftest to access private memory from the guest via private/shared accesses and checking if the contents can be leaked to/accessed by vmm via shared memory view before/after conversions. Updates in V3: 1) Series is based on v7 series from Chao 2) Changes are introduced in KVM to help execute private mem selftests 3) Selftests are executing from private memory 4) Test implementation is simplified to contain implicit/explicit memory conversion paths according to feedback from Sean. 5) Addressed comments from Sean and Shuah. This series has dependency on following patches: 1) V7 series patches from Chao mentioned above. 2) https://lore.kernel.org/lkml/20220810152033.946942-1-pgonda@google.com/T/#u - Series posted by Peter containing patches from Michael and Sean. Github link for the patches posted as part of this series: https://github.com/vishals4gh/linux/commits/priv_memfd_selftests_rfc_v3 Vishal Annapurve (6): kvm: x86: Add support for testing private memory selftests: kvm: Add support for private memory selftests: kvm: ucall: Allow querying ucall pool gpa selftests: kvm: x86: Execute hypercall as per the cpu selftests: kvm: x86: Execute VMs with private memory sefltests: kvm: x86: Add selftest for private memory arch/x86/include/uapi/asm/kvm_para.h | 2 + arch/x86/kvm/Kconfig | 1 + arch/x86/kvm/mmu/mmu.c | 19 ++ arch/x86/kvm/mmu/mmu_internal.h | 2 +- arch/x86/kvm/x86.c | 67 +++- include/linux/kvm_host.h | 12 + tools/testing/selftests/kvm/.gitignore | 1 + tools/testing/selftests/kvm/Makefile | 2 + .../selftests/kvm/include/kvm_util_base.h | 12 +- .../selftests/kvm/include/ucall_common.h | 2 + .../kvm/include/x86_64/private_mem.h | 51 +++ tools/testing/selftests/kvm/lib/kvm_util.c | 40 ++- .../testing/selftests/kvm/lib/ucall_common.c | 12 + .../selftests/kvm/lib/x86_64/private_mem.c | 297 ++++++++++++++++++ .../selftests/kvm/lib/x86_64/processor.c | 15 +- .../selftests/kvm/x86_64/private_mem_test.c | 262 +++++++++++++++ virt/kvm/Kconfig | 9 + virt/kvm/kvm_main.c | 90 +++++- 18 files changed, 887 insertions(+), 9 deletions(-) create mode 100644 tools/testing/selftests/kvm/include/x86_64/private_mem.h create mode 100644 tools/testing/selftests/kvm/lib/x86_64/private_mem.c create mode 100644 tools/testing/selftests/kvm/x86_64/private_mem_test.c -- 2.37.1.595.g718a3a8f04-goog

2 years, 2 months

2
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[PATCH 1/2] tools: Add LoongArch build infrastructure

by Huacai Chen

We will add tools support for LoongArch (bpf, perf, objtool, etc.), add build infrastructure and common headers for preparation. Signed-off-by: Huacai Chen <chenhuacai(a)loongson.cn> --- tools/arch/loongarch/include/uapi/asm/bitsperlong.h | 9 +++++++++ tools/scripts/Makefile.arch | 11 ++++++++++- 2 files changed, 19 insertions(+), 1 deletion(-) create mode 100644 tools/arch/loongarch/include/uapi/asm/bitsperlong.h diff --git a/tools/arch/loongarch/include/uapi/asm/bitsperlong.h b/tools/arch/loongarch/include/uapi/asm/bitsperlong.h new file mode 100644 index 000000000000..d4e32b3d4843 --- /dev/null +++ b/tools/arch/loongarch/include/uapi/asm/bitsperlong.h @@ -0,0 +1,9 @@ +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ +#ifndef __ASM_LOONGARCH_BITSPERLONG_H +#define __ASM_LOONGARCH_BITSPERLONG_H + +#define __BITS_PER_LONG (__SIZEOF_POINTER__ * 8) + +#include <asm-generic/bitsperlong.h> + +#endif /* __ASM_LOONGARCH_BITSPERLONG_H */ diff --git a/tools/scripts/Makefile.arch b/tools/scripts/Makefile.arch index 0c6c7f456887..1c72d07cb9fe 100644 --- a/tools/scripts/Makefile.arch +++ b/tools/scripts/Makefile.arch @@ -5,7 +5,7 @@ HOSTARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \ -e s/s390x/s390/ -e s/parisc64/parisc/ \ -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \ -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ \ - -e s/riscv.*/riscv/) + -e s/riscv.*/riscv/ -e s/loongarch.*/loongarch/) ifndef ARCH ARCH := $(HOSTARCH) @@ -34,6 +34,15 @@ ifeq ($(ARCH),sh64) SRCARCH := sh endif +# Additional ARCH settings for loongarch +ifeq ($(ARCH),loongarch32) + SRCARCH := loongarch +endif + +ifeq ($(ARCH),loongarch64) + SRCARCH := loongarch +endif + LP64 := $(shell echo __LP64__ | ${CC} ${CFLAGS} -E -x c - | tail -n 1) ifeq ($(LP64), 1) IS_64_BIT := 1 -- 2.31.1

2 years, 2 months

2
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[PATCH v14 0/3] Add TDX Guest Attestation support

by Kuppuswamy Sathyanarayanan

Hi All, Intel's Trust Domain Extensions (TDX) protect guest VMs from malicious hosts and some physical attacks. VM guest with TDX support is called as a TDX Guest. In TDX guest, attestation process is used to verify the TDX guest trustworthiness to other entities before provisioning secrets to the guest. For example, a key server may request for attestation before releasing the encryption keys to mount the encrypted rootfs or secondary drive. This patch set adds attestation support for the TDX guest. Details about the TDX attestation process and the steps involved are explained in Documentation/x86/tdx.rst (added by patch 2/3). Following are the details of the patch set: Patch 1/3 -> Preparatory patch for adding attestation support. Patch 2/3 -> Adds user interface driver to support attestation. Patch 3/3 -> Adds selftest support for TDREPORT feature. Commit log history is maintained in the individual patches. Kuppuswamy Sathyanarayanan (3): x86/tdx: Make __tdx_module_call() usable in driver module virt: Add TDX guest driver selftests: tdx: Test TDX attestation GetReport support Documentation/virt/coco/tdx-guest.rst | 42 +++++ Documentation/virt/index.rst | 1 + Documentation/x86/tdx.rst | 43 +++++ arch/x86/coco/tdx/tdcall.S | 2 + arch/x86/coco/tdx/tdx.c | 5 - arch/x86/include/asm/tdx.h | 6 + drivers/virt/Kconfig | 2 + drivers/virt/Makefile | 1 + drivers/virt/coco/tdx-guest/Kconfig | 10 ++ drivers/virt/coco/tdx-guest/Makefile | 2 + drivers/virt/coco/tdx-guest/tdx-guest.c | 131 ++++++++++++++ include/uapi/linux/tdx-guest.h | 53 ++++++ tools/testing/selftests/Makefile | 1 + tools/testing/selftests/tdx/Makefile | 7 + tools/testing/selftests/tdx/config | 1 + tools/testing/selftests/tdx/tdx_guest_test.c | 175 +++++++++++++++++++ 16 files changed, 477 insertions(+), 5 deletions(-) create mode 100644 Documentation/virt/coco/tdx-guest.rst create mode 100644 drivers/virt/coco/tdx-guest/Kconfig create mode 100644 drivers/virt/coco/tdx-guest/Makefile create mode 100644 drivers/virt/coco/tdx-guest/tdx-guest.c create mode 100644 include/uapi/linux/tdx-guest.h create mode 100644 tools/testing/selftests/tdx/Makefile create mode 100644 tools/testing/selftests/tdx/config create mode 100644 tools/testing/selftests/tdx/tdx_guest_test.c -- 2.34.1

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Linux-kselftest-mirror September 2022