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[RFC PATCH v2 00/35] AMD: Add Secure AVIC KVM selftests

by Neeraj Upadhyay

This series adds KVM selftests for Secure AVIC. The Secure AVIC KVM support patch series is at: https://lore.kernel.org/kvm/20250923050317.205482-1-Neeraj.Upadhyay@amd.com/ Git tree is available at: https://github.com/AMDESE/linux-kvm/tree/savic-host-latest Changes since v1: v1: https://lore.kernel.org/lkml/20250228093024.114983-1-Neeraj.Upadhyay@amd.co… - Drop Secure AVIC APIC regs test as it relied on KVM_GET_LAPIC, KVM_SET_LAPIC IOCTLS. Since commit f65916a ("KVM: TDX: Force APICv active for TDX guest"), these IOCTLs do not work for protected APIC guests. - Rebase on top of latest kvm next tree. - Add detailed commit logs. - Clean up the instruction decoder. Neeraj Upadhyay (29): KVM: selftests: Return an unused GHCB from the pool KVM: selftests: Align GHCB entry struct to page size KVM: selftests: Add #VC exception handler with error code support KVM: selftests: Add MSR access support for SEV-ES guests KVM: selftests: Skip guest memory checks for APIC MMIO mapping KVM: selftests: Add x86 instruction decoding library KVM: selftests: Adapt instruction decoder library for userspace KVM: selftests: Restrict instruction decoder to x86_64 only KVM: selftests: Remove unneeded functions from instruction decoder KVM: selftests: Fix missing definitions in x86 instruction decoder KVM: selftests: Change pt_regs to ex_regs for selftest use KVM: selftests: Add compilation for instruction decoder library KVM: selftests: Add MMIO #VC exception handling for SEV-ES guests KVM: selftests: Add instruction decoding for movabs instructions KVM: selftests: Add SEV guest support in xapic_state_test KVM: selftests: Add x2apic mode testing in xapic_ipi_test KVM: selftests: Add SEV VM support in xapic_ipi_test KVM: selftests: Add Secure AVIC library KVM: selftests: Add #VC handler for unaccelerated Secure AVIC MSRs KVM: selftests: Add IPI handling support for Secure AVIC KVM: selftests: Add args parameter to kvm_arch_vm_post_create() KVM: selftests: Add GHCB call for SAVIC backing page notification KVM: selftests: Add Secure AVIC mode to xapic_ipi_test KVM: selftests: Add test to verify APIC MSR accesses for SAVIC guest KVM: selftests: Extend savic_test with idle halt testing KVM: selftests: Add IOAPIC tests for Secure AVIC KVM: selftests: Add cross-vCPU IPI testing for SAVIC guests KVM: selftests: Add NMI test for SAVIC guests KVM: selftests: Add MSI injection test for SAVIC Peter Gonda (6): Add GHCB with setters and getters Add arch specific additional guest pages Add vm_vaddr_alloc_pages_shared() Add GHCB allocations and helpers Add is_sev_enabled() helpers Add ability for SEV-ES guests to use ucalls via GHCB tools/arch/x86/include/asm/msr-index.h | 4 +- tools/testing/selftests/kvm/.gitignore | 3 +- tools/testing/selftests/kvm/Makefile.kvm | 14 +- .../testing/selftests/kvm/arm64/set_id_regs.c | 2 +- .../testing/selftests/kvm/include/kvm_util.h | 14 +- .../testing/selftests/kvm/include/x86/apic.h | 57 + .../selftests/kvm/include/x86/insn-eval.h | 48 + .../selftests/kvm/include/x86/processor.h | 8 + .../testing/selftests/kvm/include/x86/savic.h | 25 + tools/testing/selftests/kvm/include/x86/sev.h | 29 + tools/testing/selftests/kvm/include/x86/svm.h | 109 ++ tools/testing/selftests/kvm/lib/kvm_util.c | 109 +- .../testing/selftests/kvm/lib/x86/handlers.S | 4 +- .../testing/selftests/kvm/lib/x86/insn-eval.c | 1238 +++++++++++++++++ .../testing/selftests/kvm/lib/x86/processor.c | 24 +- tools/testing/selftests/kvm/lib/x86/savic.c | 488 +++++++ tools/testing/selftests/kvm/lib/x86/sev.c | 581 +++++++- tools/testing/selftests/kvm/lib/x86/ucall.c | 18 + tools/testing/selftests/kvm/s390/cmma_test.c | 2 +- tools/testing/selftests/kvm/x86/savic_test.c | 1171 ++++++++++++++++ .../selftests/kvm/x86/sev_smoke_test.c | 40 +- .../selftests/kvm/x86/xapic_ipi_test.c | 183 ++- .../selftests/kvm/x86/xapic_state_test.c | 117 +- 23 files changed, 4192 insertions(+), 96 deletions(-) create mode 100644 tools/testing/selftests/kvm/include/x86/insn-eval.h create mode 100644 tools/testing/selftests/kvm/include/x86/savic.h create mode 100644 tools/testing/selftests/kvm/lib/x86/insn-eval.c create mode 100644 tools/testing/selftests/kvm/lib/x86/savic.c create mode 100644 tools/testing/selftests/kvm/x86/savic_test.c base-commit: a6ad54137af92535cfe32e19e5f3bc1bb7dbd383 -- 2.34.1

1 month, 2 weeks

1
35
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[PATCH] selftests: Fix Makefile to run targets even the ones in SKIP_TARGETS

by I Viswanath

With the current Makefile, if the user tries something like make TARGETS="bpf mm" only mm is run and bpf is skipped, which is not intentional. `bpf` and `sched_ext` are always filtered out even when TARGETS is set explicitly due to how SKIP_TARGETS is implemented. This default skip exists because these tests require newer LLVM/Clang versions that may not be available on all systems. Fix the SKIP_TARGETS logic so that bpf and sched_ext remain skipped when TARGETS is taken from the Makefile but are included when the user specifies them explicitly. Signed-off-by: I Viswanath <viswanathiyyappan(a)gmail.com> --- make --silent summary=1 TARGETS="bpf size" kselftest make[3]: Entering directory '/home/user/kernel-dev/linux-next/tools/testing/selftests/bpf' Auto-detecting system features: ... llvm: [ OFF ] Makefile:127: tools/build/Makefile.feature: No such file or directory make[4]: *** No rule to make target 'tools/build/Makefile.feature'. Stop. make[3]: *** [Makefile:344: /home/user/kernel-dev/linux-next/tools/testing/selftests/bpf/tools/sbin/bpftool] Error 2 make[3]: Leaving directory '/home/user/kernel-dev/linux-next/tools/testing/selftests/bpf' make[3]: Nothing to be done for 'all'. make[3]: Entering directory '/home/user/kernel-dev/linux-next/tools/testing/selftests/bpf' Auto-detecting system features: ... llvm: [ OFF ] Makefile:127: tools/build/Makefile.feature: No such file or directory make[4]: *** No rule to make target 'tools/build/Makefile.feature'. Stop. make[3]: *** [Makefile:344: /home/user/kernel-dev/linux-next/tools/testing/selftests/bpf/tools/sbin/bpftool] Error 2 make[3]: Leaving directory '/home/user/kernel-dev/linux-next/tools/testing/selftests/bpf' TAP version 13 1..1 # selftests: size: get_size ok 1 selftests: size: get_size make --silent summary=1 kselftest (bpf is between arm64 and breakpoints in TARGETS) make[3]: Nothing to be done for 'all'. make[3]: Entering directory '/home/user/kernel-dev/linux-next/tools/testing/selftests/alsa' make[3]: Nothing to be done for 'all'. make[3]: Leaving directory '/home/user/kernel-dev/linux-next/tools/testing/selftests/alsa' make[3]: Entering directory '/home/user/kernel-dev/linux-next/tools/testing/selftests/amd-pstate' make[3]: Nothing to be done for 'all'. make[3]: Leaving directory '/home/user/kernel-dev/linux-next/tools/testing/selftests/amd-pstate' make[3]: Entering directory '/home/user/kernel-dev/linux-next/tools/testing/selftests/arm64' make[3]: Leaving directory '/home/user/kernel-dev/linux-next/tools/testing/selftests/arm64' make[3]: Entering directory '/home/user/kernel-dev/linux-next/tools/testing/selftests/breakpoints' make[3]: Nothing to be done for 'all'. make[3]: Leaving directory '/home/user/kernel-dev/linux-next/tools/testing/selftests/breakpoints' make[3]: Nothing to be done for 'all'. tools/testing/selftests/Makefile | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile index babed7b1c2d1..c6cedb09c372 100644 --- a/tools/testing/selftests/Makefile +++ b/tools/testing/selftests/Makefile @@ -145,7 +145,10 @@ endif # User can optionally provide a TARGETS skiplist. By default we skip # targets using BPF since it has cutting edge build time dependencies # which require more effort to install. -SKIP_TARGETS ?= bpf sched_ext +ifeq ($(origin TARGETS), file) + SKIP_TARGETS ?= bpf sched_ext +endif + ifneq ($(SKIP_TARGETS),) TMP := $(filter-out $(SKIP_TARGETS), $(TARGETS)) override TARGETS := $(TMP) -- 2.47.3

1 month, 2 weeks

2
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[PATCH net-next 0/6] mptcp: pm: netlink: announce server-side flag

by Matthieu Baerts (NGI0)

Now that the 'flags' attribute is used, it seems interesting to add one flag for 'server-side', a boolean value. Here are a few patches related to the 'server-side' attribute: - Patch 1: only announce this attribute on the server side. - Patch 2: announce the 'server-side' flag when this is the case. - Patch 3: deprecate the 'server-side' attribute. - Patch 4: use the 'server-side' flag in the selftests. - Patches 5, 6: small cleanups when working on code around. Signed-off-by: Matthieu Baerts (NGI0) <matttbe(a)kernel.org> --- Matthieu Baerts (NGI0) (6): mptcp: pm: netlink: only add server-side attr when true mptcp: pm: netlink: announce server-side flag mptcp: pm: netlink: deprecate server-side attribute selftests: mptcp: pm: get server-side flag mptcp: use _BITUL() instead of (1 << x) mptcp: remove unused returned value of check_data_fin Documentation/netlink/specs/mptcp_pm.yaml | 5 +++-- include/uapi/linux/mptcp.h | 11 ++++++----- include/uapi/linux/mptcp_pm.h | 4 ++-- net/mptcp/pm_netlink.c | 9 +++++++-- net/mptcp/protocol.c | 5 +---- tools/testing/selftests/net/mptcp/pm_nl_ctl.c | 9 ++++++++- tools/testing/selftests/net/mptcp/userspace_pm.sh | 2 +- 7 files changed, 28 insertions(+), 17 deletions(-) --- base-commit: 315f423be0d1ebe720d8fd4fa6bed68586b13d34 change-id: 20250916-net-next-mptcp-server-side-flag-0f002418946d Best regards, -- Matthieu Baerts (NGI0) <matttbe(a)kernel.org>

1 month, 2 weeks

3
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[PATCH net-next v3] selftests: forwarding: Reorder (ar)ping arguments to obey POSIX getopt

by David Yang

Quoted from musl wiki: GNU getopt permutes argv to pull options to the front, ahead of non-option arguments. musl and the POSIX standard getopt stop processing options at the first non-option argument with no permutation. Thus these scripts stop working on musl since non-option arguments for tools using getopt() (in this case, (ar)ping) do not always come last. Fix it by reordering arguments. Signed-off-by: David Yang <mmyangfl(a)gmail.com> --- v2: https://lore.kernel.org/r/20250906170440.3513399-1-mmyangfl@gmail.com - fix (ar)ping only v1: https://lore.kernel.org/r/20250905173947.3164807-1-mmyangfl@gmail.com - fix CI errors .../selftests/net/forwarding/custom_multipath_hash.sh | 2 +- .../selftests/net/forwarding/gre_custom_multipath_hash.sh | 2 +- .../selftests/net/forwarding/ip6_forward_instats_vrf.sh | 6 +++--- .../net/forwarding/ip6gre_custom_multipath_hash.sh | 2 +- tools/testing/selftests/net/forwarding/lib.sh | 8 ++++---- .../selftests/net/forwarding/mirror_gre_bridge_1q_lag.sh | 2 +- .../selftests/net/forwarding/mirror_gre_vlan_bridge_1q.sh | 4 ++-- 7 files changed, 13 insertions(+), 13 deletions(-) diff --git a/tools/testing/selftests/net/forwarding/custom_multipath_hash.sh b/tools/testing/selftests/net/forwarding/custom_multipath_hash.sh index 7d531f7091e6..5dbfab0e23e3 100755 --- a/tools/testing/selftests/net/forwarding/custom_multipath_hash.sh +++ b/tools/testing/selftests/net/forwarding/custom_multipath_hash.sh @@ -226,7 +226,7 @@ send_flowlabel() # Generate 16384 echo requests, each with a random flow label. ip vrf exec v$h1 sh -c \ "for _ in {1..16384}; do \ - $PING6 2001:db8:4::2 -F 0 -c 1 -q >/dev/null 2>&1; \ + $PING6 -F 0 -c 1 -q 2001:db8:4::2 >/dev/null 2>&1; \ done" } diff --git a/tools/testing/selftests/net/forwarding/gre_custom_multipath_hash.sh b/tools/testing/selftests/net/forwarding/gre_custom_multipath_hash.sh index dda11a4a9450..b4f17a5bbc61 100755 --- a/tools/testing/selftests/net/forwarding/gre_custom_multipath_hash.sh +++ b/tools/testing/selftests/net/forwarding/gre_custom_multipath_hash.sh @@ -321,7 +321,7 @@ send_flowlabel() # Generate 16384 echo requests, each with a random flow label. ip vrf exec v$h1 sh -c \ "for _ in {1..16384}; do \ - $PING6 2001:db8:2::2 -F 0 -c 1 -q >/dev/null 2>&1; \ + $PING6 -F 0 -c 1 -q 2001:db8:2::2 >/dev/null 2>&1; \ done" } diff --git a/tools/testing/selftests/net/forwarding/ip6_forward_instats_vrf.sh b/tools/testing/selftests/net/forwarding/ip6_forward_instats_vrf.sh index 49fa94b53a1c..25036e38043c 100755 --- a/tools/testing/selftests/net/forwarding/ip6_forward_instats_vrf.sh +++ b/tools/testing/selftests/net/forwarding/ip6_forward_instats_vrf.sh @@ -95,7 +95,7 @@ ipv6_in_too_big_err() # Send too big packets ip vrf exec $vrf_name \ - $PING6 -s 1300 2001:1:2::2 -c 1 -w $PING_TIMEOUT &> /dev/null + $PING6 -s 1300 -c 1 -w $PING_TIMEOUT 2001:1:2::2 &> /dev/null local t1=$(ipv6_stats_get $rtr1 Ip6InTooBigErrors) test "$((t1 - t0))" -ne 0 @@ -131,7 +131,7 @@ ipv6_in_addr_err() # Disable forwarding temporary while sending the packet sysctl -qw net.ipv6.conf.all.forwarding=0 ip vrf exec $vrf_name \ - $PING6 2001:1:2::2 -c 1 -w $PING_TIMEOUT &> /dev/null + $PING6 -c 1 -w $PING_TIMEOUT 2001:1:2::2 &> /dev/null sysctl -qw net.ipv6.conf.all.forwarding=1 local t1=$(ipv6_stats_get $rtr1 Ip6InAddrErrors) @@ -150,7 +150,7 @@ ipv6_in_discard() # Add a policy to discard ip xfrm policy add dst 2001:1:2::2/128 dir fwd action block ip vrf exec $vrf_name \ - $PING6 2001:1:2::2 -c 1 -w $PING_TIMEOUT &> /dev/null + $PING6 -c 1 -w $PING_TIMEOUT 2001:1:2::2 &> /dev/null ip xfrm policy del dst 2001:1:2::2/128 dir fwd local t1=$(ipv6_stats_get $rtr1 Ip6InDiscards) diff --git a/tools/testing/selftests/net/forwarding/ip6gre_custom_multipath_hash.sh b/tools/testing/selftests/net/forwarding/ip6gre_custom_multipath_hash.sh index e28b4a079e52..b24acfa52a3a 100755 --- a/tools/testing/selftests/net/forwarding/ip6gre_custom_multipath_hash.sh +++ b/tools/testing/selftests/net/forwarding/ip6gre_custom_multipath_hash.sh @@ -323,7 +323,7 @@ send_flowlabel() # Generate 16384 echo requests, each with a random flow label. ip vrf exec v$h1 sh -c \ "for _ in {1..16384}; do \ - $PING6 2001:db8:2::2 -F 0 -c 1 -q >/dev/null 2>&1; \ + $PING6 -F 0 -c 1 -q 2001:db8:2::2 >/dev/null 2>&1; \ done" } diff --git a/tools/testing/selftests/net/forwarding/lib.sh b/tools/testing/selftests/net/forwarding/lib.sh index 08121cb9dc26..2c252423b326 100644 --- a/tools/testing/selftests/net/forwarding/lib.sh +++ b/tools/testing/selftests/net/forwarding/lib.sh @@ -1267,8 +1267,8 @@ ping_do() vrf_name=$(master_name_get $if_name) ip vrf exec $vrf_name \ - $PING $args $dip -c $PING_COUNT -i 0.1 \ - -w $PING_TIMEOUT &> /dev/null + $PING $args -c $PING_COUNT -i 0.1 \ + -w $PING_TIMEOUT $dip &> /dev/null } ping_test() @@ -1298,8 +1298,8 @@ ping6_do() vrf_name=$(master_name_get $if_name) ip vrf exec $vrf_name \ - $PING6 $args $dip -c $PING_COUNT -i 0.1 \ - -w $PING_TIMEOUT &> /dev/null + $PING6 $args -c $PING_COUNT -i 0.1 \ + -w $PING_TIMEOUT $dip &> /dev/null } ping6_test() diff --git a/tools/testing/selftests/net/forwarding/mirror_gre_bridge_1q_lag.sh b/tools/testing/selftests/net/forwarding/mirror_gre_bridge_1q_lag.sh index a20d22d1df36..8d4ae6c952a1 100755 --- a/tools/testing/selftests/net/forwarding/mirror_gre_bridge_1q_lag.sh +++ b/tools/testing/selftests/net/forwarding/mirror_gre_bridge_1q_lag.sh @@ -238,7 +238,7 @@ test_lag_slave() ip neigh flush dev br1 setup_wait_dev $up_dev setup_wait_dev $host_dev - $ARPING -I br1 192.0.2.130 -qfc 1 + $ARPING -I br1 -qfc 1 192.0.2.130 sleep 2 mirror_test vrf-h1 192.0.2.1 192.0.2.18 $host_dev 1 ">= 10" diff --git a/tools/testing/selftests/net/forwarding/mirror_gre_vlan_bridge_1q.sh b/tools/testing/selftests/net/forwarding/mirror_gre_vlan_bridge_1q.sh index 1b902cc579f6..a21c771908b3 100755 --- a/tools/testing/selftests/net/forwarding/mirror_gre_vlan_bridge_1q.sh +++ b/tools/testing/selftests/net/forwarding/mirror_gre_vlan_bridge_1q.sh @@ -196,7 +196,7 @@ test_span_gre_forbidden_egress() bridge vlan add dev $swp3 vid 555 # Re-prime FDB - $ARPING -I br1.555 192.0.2.130 -fqc 1 + $ARPING -I br1.555 -fqc 1 192.0.2.130 sleep 1 quick_test_span_gre_dir $tundev @@ -290,7 +290,7 @@ test_span_gre_fdb_roaming() bridge fdb del dev $swp2 $h3mac vlan 555 master 2>/dev/null # Re-prime FDB - $ARPING -I br1.555 192.0.2.130 -fqc 1 + $ARPING -I br1.555 -fqc 1 192.0.2.130 sleep 1 quick_test_span_gre_dir $tundev -- 2.51.0

1 month, 2 weeks

4
3
0 0

[PATCH RFC bpf-next 0/6] Add the the capability to load HW RX checsum in eBPF programs

by Lorenzo Bianconi

Introduce bpf_xdp_metadata_rx_checksum() kfunc in order to load the HW RX cheksum results in the eBPF program binded to the NIC. Implement xmo_rx_checksum callback for veth and ice drivers. --- Lorenzo Bianconi (6): netlink: specs: Add XDP RX checksum capability to XDP metadata specs net: xdp: Add xmo_rx_checksum callback veth: Add xmo_rx_checksum callback to veth driver net: ice: Add xmo_rx_checksum callback selftests/bpf: Add selftest support for bpf_xdp_metadata_rx_checksum selftests/bpf: Add bpf_xdp_metadata_rx_checksum support to xdp_hw_metadat prog Documentation/netlink/specs/netdev.yaml | 5 ++ drivers/net/ethernet/intel/ice/ice_base.c | 1 + drivers/net/ethernet/intel/ice/ice_txrx.h | 1 + drivers/net/ethernet/intel/ice/ice_txrx_lib.c | 82 ++++++++++++++++++++++ drivers/net/veth.c | 19 +++++ include/net/xdp.h | 6 ++ net/core/xdp.c | 29 ++++++++ .../selftests/bpf/prog_tests/xdp_metadata.c | 7 ++ .../testing/selftests/bpf/progs/xdp_hw_metadata.c | 7 ++ tools/testing/selftests/bpf/progs/xdp_metadata.c | 1 + tools/testing/selftests/bpf/xdp_hw_metadata.c | 27 +++++++ tools/testing/selftests/bpf/xdp_metadata.h | 13 ++++ 12 files changed, 198 insertions(+) --- base-commit: 315f423be0d1ebe720d8fd4fa6bed68586b13d34 change-id: 20250915-xdp-meta-rxcksum-963cb3a793e7 Best regards, -- Lorenzo Bianconi <lorenzo(a)kernel.org>

1 month, 2 weeks

3
12
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[PATCH][next] selftests/clone3: Fix spelling mistake "supportd" -> "supported"

by Colin Ian King

There is a spelling mistake in a ksft_print_msg message. Fix it. Signed-off-by: Colin Ian King <colin.i.king(a)gmail.com> --- tools/testing/selftests/clone3/clone3.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/clone3/clone3.c b/tools/testing/selftests/clone3/clone3.c index 05c3d2dcbf2a..385cf08f8cf8 100644 --- a/tools/testing/selftests/clone3/clone3.c +++ b/tools/testing/selftests/clone3/clone3.c @@ -71,7 +71,7 @@ static void test_shadow_stack_supported(void) } else if ((void *)ret == MAP_FAILED) { ksft_print_msg("Failed to map shadow stack\n"); } else { - ksft_print_msg("Shadow stack supportd\n"); + ksft_print_msg("Shadow stack supported\n"); shadow_stack_supported = true; if (!shadow_stack_enabled) -- 2.51.0

1 month, 2 weeks

1
0
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[PATCH 00/15 v6.6.y] Backport minmax.h updates from v6.17-rc7

by Eliav Farber

This series backports 15 patches to update minmax.h in the 6.6.y branch, aligning it with v6.17-rc7. The ultimate goal is to synchronize all longterm branches so that they include the full set of minmax.h changes. The key motivation is to bring in commit d03eba99f5bf ("minmax: allow min()/max()/clamp() if the arguments have the same signedness"), which is missing in older kernels. In mainline, this change enables min()/max()/clamp() to accept mixed argument types, provided both have the same signedness. Without it, backported patches that use these forms may trigger compiler warnings, which escalate to build failures when -Werror is enabled. David Laight (7): minmax.h: add whitespace around operators and after commas minmax.h: update some comments minmax.h: reduce the #define expansion of min(), max() and clamp() minmax.h: use BUILD_BUG_ON_MSG() for the lo < hi test in clamp() minmax.h: move all the clamp() definitions after the min/max() ones minmax.h: simplify the variants of clamp() minmax.h: remove some #defines that are only expanded once Linus Torvalds (8): minmax: avoid overly complicated constant expressions in VM code minmax: simplify and clarify min_t()/max_t() implementation minmax: add a few more MIN_T/MAX_T users minmax: make generic MIN() and MAX() macros available everywhere minmax: simplify min()/max()/clamp() implementation minmax: don't use max() in situations that want a C constant expression minmax: improve macro expansion and type checking minmax: fix up min3() and max3() too arch/um/drivers/mconsole_user.c | 2 + arch/x86/mm/pgtable.c | 2 +- drivers/edac/sb_edac.c | 4 +- drivers/edac/skx_common.h | 1 - .../drm/amd/display/modules/hdcp/hdcp_ddc.c | 2 + .../drm/amd/pm/powerplay/hwmgr/ppevvmath.h | 14 +- drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c | 2 +- drivers/gpu/drm/drm_color_mgmt.c | 2 +- drivers/gpu/drm/radeon/evergreen_cs.c | 2 + drivers/hwmon/adt7475.c | 24 +- drivers/input/touchscreen/cyttsp4_core.c | 2 +- drivers/irqchip/irq-sun6i-r.c | 2 +- drivers/md/dm-integrity.c | 6 +- drivers/media/dvb-frontends/stv0367_priv.h | 3 + .../net/can/usb/etas_es58x/es58x_devlink.c | 2 +- .../net/ethernet/stmicro/stmmac/stmmac_main.c | 2 +- drivers/net/fjes/fjes_main.c | 4 +- drivers/nfc/pn544/i2c.c | 2 - drivers/platform/x86/sony-laptop.c | 1 - drivers/scsi/isci/init.c | 6 +- .../pci/hive_isp_css_include/math_support.h | 5 - fs/btrfs/tree-checker.c | 2 +- include/linux/compiler.h | 9 + include/linux/minmax.h | 228 +++++++++++------- include/linux/pageblock-flags.h | 2 +- kernel/trace/preemptirq_delay_test.c | 2 - lib/btree.c | 1 - lib/decompress_unlzma.c | 2 + lib/vsprintf.c | 2 +- mm/zsmalloc.c | 2 - net/ipv4/proc.c | 2 +- net/ipv6/proc.c | 2 +- tools/testing/selftests/mm/mremap_test.c | 2 + tools/testing/selftests/seccomp/seccomp_bpf.c | 2 + 34 files changed, 202 insertions(+), 146 deletions(-) -- 2.47.3

1 month, 2 weeks

1
15
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[PATCH 0/2] eventpoll: Fix epoll_wait() report false negative

by Nam Cao

Hi, While staring at epoll, I noticed ep_events_available() looks wrong. I wrote a small program to confirm, and yes it is definitely wrong. This series adds a reproducer to kselftest, and fix the bug. Nam Cao (2): selftests/eventpoll: Add test for multiple waiters eventpoll: Fix epoll_wait() report false negative fs/eventpoll.c | 16 +------ .../filesystems/epoll/epoll_wakeup_test.c | 45 +++++++++++++++++++ 2 files changed, 47 insertions(+), 14 deletions(-) -- 2.39.5

1 month, 2 weeks

5
15
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[PATCH RESEND] selftests/powerpc/pmu/: Add check_extended_reg_test to .gitignore

by Gopi Krishna Menon

Add the check_extended_reg_test binary to .gitignore to avoid accidentally staging the build artifact. Signed-off-by: Gopi Krishna Menon <krishnagopi487(a)gmail.com> --- tools/testing/selftests/powerpc/pmu/sampling_tests/.gitignore | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/testing/selftests/powerpc/pmu/sampling_tests/.gitignore b/tools/testing/selftests/powerpc/pmu/sampling_tests/.gitignore index f93b4c7c3a8a..ea29228334e8 100644 --- a/tools/testing/selftests/powerpc/pmu/sampling_tests/.gitignore +++ b/tools/testing/selftests/powerpc/pmu/sampling_tests/.gitignore @@ -1,5 +1,6 @@ bhrb_filter_map_test bhrb_no_crash_wo_pmu_test +check_extended_reg_test intr_regs_no_crash_wo_pmu_test mmcr0_cc56run_test mmcr0_exceptionbits_test -- 2.43.0

1 month, 2 weeks

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[RFC PATCH bpf-next v1 0/3] bpf: Add BPF program type for overriding tracepoint probes

by Fuyu Zhao

Hi everyone, This patchset introduces a new BPF program type that allows overriding a tracepoint probe function registered via register_trace_*. Motivation ---------- Tracepoint probe functions registered via register_trace_* in the kernel cannot be dynamically modified, changing a probe function requires recompiling the kernel and rebooting. Nor can BPF programs change an existing probe function. Overiding tracepoint supports a way to apply patches into kernel quickly (such as applying security ones), through predefined static tracepoints, without waiting for upstream integration. This patchset demonstrates the way to override probe functions by BPF program. Overview -------- This patchset adds BPF_PROG_TYPE_RAW_TRACEPOINT_OVERRIDE program type. When this type of BPF program attaches, it overrides the target tracepoint probe function. And it also extends a new struct type "tracepoint_func_snapshot", which extends the tracepoint structure. It is used to record the original probe function registered by kernel after BPF program being attached and restore from it after detachment. Critical steps -------------- 1. Attach: Attach programs via the raw_tracepoint_open syscall. 2. Override: (a) Locate the target probe by `probe_name`. (b) Override target probe with the BPF program. (c) Save the BPF program and target probe function into "tracepoint_func_snapshot". 3. Restore: When the BPF program is detached, automatically restore the original probe function from earlier saved snapshot. Future work ----------- This patchset is intended as a first step toward supporting BPF programs that can override tracepoint probes. The current implementation may not yet cover all use cases or handle every corner case. I welcome feedback and suggestions from the community, and will continue to refine and improve the design based on comments and real-world requirements. Thanks! Fuyu Fuyu Zhao (3): bpf: Introduce BPF_PROG_TYPE_RAW_TRACEPOINT_OVERRIDE libbpf: Add support for BPF_PROG_TYPE_RAW_TRACEPOINT_OVERRIDE selftests/bpf: Add selftest for "raw_tp.o" include/linux/bpf_types.h | 2 + include/linux/trace_events.h | 9 + include/linux/tracepoint-defs.h | 6 + include/linux/tracepoint.h | 3 + include/uapi/linux/bpf.h | 2 + kernel/bpf/syscall.c | 35 +++- kernel/trace/bpf_trace.c | 31 +++ kernel/tracepoint.c | 190 +++++++++++++++++- tools/include/uapi/linux/bpf.h | 2 + tools/lib/bpf/bpf.c | 1 + tools/lib/bpf/bpf.h | 3 +- tools/lib/bpf/libbpf.c | 27 ++- tools/lib/bpf/libbpf.h | 3 +- .../bpf/prog_tests/raw_tp_override_test_run.c | 23 +++ .../bpf/progs/test_raw_tp_override_test_run.c | 20 ++ .../selftests/bpf/test_kmods/bpf_testmod.c | 7 + 16 files changed, 352 insertions(+), 12 deletions(-) create mode 100644 tools/testing/selftests/bpf/prog_tests/raw_tp_override_test_run.c create mode 100644 tools/testing/selftests/bpf/progs/test_raw_tp_override_test_run.c -- 2.43.0

1 month, 2 weeks

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