Changes in Makefile

108e5e68 - selftests/powerpc: make sub-folders buildable on their own

Thu, 29 Feb 2024 09:37:11 +0000

selftests/powerpc: make sub-folders buildable on their ownBuild breaks when executing make with run_tests for sub-foldersunder powerpc. This is because, CFLAGS and GIT_VERSION macros aredefined in Makefile of toplevel powerpc folder. make: Entering directory '/home/maddy/linux/tools/testing/selftests/powerpc/mm' gcc hugetlb_vs_thp_test.c ../harness.c ../utils.c -o /home/maddy/selftest_output//hugetlb_vs_thp_test hugetlb_vs_thp_test.c:6:10: fatal error: utils.h: No such file or directory 6 | #include "utils.h" | ^~~~~~~~~ compilation terminated.Fix this by adding the flags.mk in each sub-folder Makefile. Also removethe CFLAGS and GIT_VERSION macros from powerpc/ folder Makefile sincethe same is definied in flags.mkSigned-off-by: Madhavan Srinivasan Signed-off-by: Michael Ellerman Link: https://msgid.link/20240229093711.581230-3-maddy@linux.ibm.com List of files: /linux-6.15/tools/testing/selftests/powerpc/security/Makefile

37496845 - selftests/powerpc: Re-order *FLAGS to follow lib.mk

Thu, 29 Feb 2024 09:37:09 +0000

selftests/powerpc: Re-order *FLAGS to follow lib.mkIn some powerpc/ sub-folder Makefiles, CFLAGS are defined before lib.mkinclude. Clean it up by re-ordering the flags to follow after the mkinclude. This is needed to support sub-folders in powerpc/ buildable onits own.Signed-off-by: Madhavan Srinivasan Signed-off-by: Michael Ellerman Link: https://msgid.link/20240229093711.581230-1-maddy@linux.ibm.com List of files: /linux-6.15/tools/testing/selftests/powerpc/security/Makefile

4f11410b - selftests/powerpc: Fix incorrect kernel headers search path

Fri, 27 Jan 2023 13:57:42 +0000

selftests/powerpc: Fix incorrect kernel headers search pathUse $(KHDR_INCLUDES) as lookup path for kernel headers. This preventsbuilding against kernel headers from the build environment in scenarioswhere kernel headers are installed into a specific output directory(O=...).Cc: stable@vger.kernel.org # v5.18+Signed-off-by: Mathieu Desnoyers Acked-by: Shuah Khan Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20230127135755.79929-22-mathieu.desnoyers@efficios.com List of files: /linux-6.15/tools/testing/selftests/powerpc/security/Makefile

34f7f798 - selftests/powerpc: Add test of mitigation patching

Fri, 07 May 2021 06:42:25 +0000

selftests/powerpc: Add test of mitigation patchingWe recently discovered some of our mitigation patching was not safeagainst other CPUs running concurrently.Add a test which enable/disables all mitigations in a tight loop whilealso running some stress load. On an unpatched system this almost alwaysleads to an oops and panic/reboot, but we also check if the kernelbecomes tainted in case we have a non-fatal oops.Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20210507064225.1556312-1-mpe@ellerman.id.au List of files: /linux-6.15/tools/testing/selftests/powerpc/security/Makefile

da650ada - selftests/powerpc: Add uaccess flush test

Thu, 25 Feb 2021 06:19:49 +0000

selftests/powerpc: Add uaccess flush testAlso based on the RFI and entry flush tests, it counts the L1D missesby doing a syscall that does user access: uname, in this case.Signed-off-by: Thadeu Lima de Souza Cascardo [dja: forward port, rename function]Signed-off-by: Daniel Axtens Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20210225061949.1213404-1-dja@axtens.net List of files: /linux-6.15/tools/testing/selftests/powerpc/security/Makefile

0d239f3b - selftests/powerpc: refactor entry and rfi_flush tests

Tue, 17 Nov 2020 05:59:15 +0000

selftests/powerpc: refactor entry and rfi_flush testsFor simplicity in backporting, the original entry_flush test containeda lot of duplicated code from the rfi_flush test. De-duplicate that code.Signed-off-by: Daniel Axtens Signed-off-by: Michael Ellerman List of files: /linux-6.15/tools/testing/selftests/powerpc/security/Makefile

89a83a0c - selftests/powerpc: entry flush test

Tue, 17 Nov 2020 05:59:14 +0000

selftests/powerpc: entry flush testAdd a test modelled on the RFI flush test which counts the numberof L1D misses doing a simple syscall with the entry flush on and off.For simplicity of backporting, this test duplicates a lot of code fromrfi_flush. We clean that up in the next patch.Signed-off-by: Daniel Axtens Signed-off-by: Michael Ellerman List of files: /linux-6.15/tools/testing/selftests/powerpc/security/Makefile

bf9c95e2 - selftests/powerpc: spectre_v2 test must be built 64-bit

Wed, 20 Nov 2019 02:37:23 +0000

selftests/powerpc: spectre_v2 test must be built 64-bitThe spectre_v2 test must be built 64-bit, it includes hand-written asmthat is 64-bit only, and segfaults if built 32-bit.Fixes: c790c3d2b0ec ("selftests/powerpc: Add a test of spectre_v2 mitigations")Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20191120023924.13130-1-mpe@ellerman.id.au List of files: /linux-6.15/tools/testing/selftests/powerpc/security/Makefile

c790c3d2 - selftests/powerpc: Add a test of spectre_v2 mitigations

Mon, 20 May 2019 10:55:20 +0000

selftests/powerpc: Add a test of spectre_v2 mitigationsThis test uses the PMU to count branch prediction hits/misses for aknown loop, and compare the result to the reported spectre v2mitigation.This gives us a way of sanity checking that the reported mitigation isactually in effect.Sample output for some cases, eg: Power9: sysfs reports: 'Vulnerable' PM_BR_PRED_CCACHE: result 368 running/enabled 5792777124 PM_BR_MPRED_CCACHE: result 319 running/enabled 5792775546 PM_BR_PRED_PCACHE: result 2147483281 running/enabled 5792773128 PM_BR_MPRED_PCACHE: result 213604201 running/enabled 5792771640 Miss percent 9 % OK - Measured branch prediction rates match reported spectre v2 mitigation. sysfs reports: 'Mitigation: Indirect branch serialisation (kernel only)' PM_BR_PRED_CCACHE: result 895 running/enabled 5780320920 PM_BR_MPRED_CCACHE: result 822 running/enabled 5780312414 PM_BR_PRED_PCACHE: result 2147482754 running/enabled 5780308836 PM_BR_MPRED_PCACHE: result 213639731 running/enabled 5780307912 Miss percent 9 % OK - Measured branch prediction rates match reported spectre v2 mitigation. sysfs reports: 'Mitigation: Indirect branch cache disabled' PM_BR_PRED_CCACHE: result 2147483649 running/enabled 20540186160 PM_BR_MPRED_CCACHE: result 2147483649 running/enabled 20540180056 PM_BR_PRED_PCACHE: result 0 running/enabled 20540176090 PM_BR_MPRED_PCACHE: result 0 running/enabled 20540174182 Miss percent 100 % OK - Measured branch prediction rates match reported spectre v2 mitigation. Power8: sysfs reports: 'Vulnerable' PM_BR_PRED_CCACHE: result 2147483649 running/enabled 3505888142 PM_BR_MPRED_CCACHE: result 9 running/enabled 3505882788 Miss percent 0 % OK - Measured branch prediction rates match reported spectre v2 mitigation. sysfs reports: 'Mitigation: Indirect branch cache disabled' PM_BR_PRED_CCACHE: result 2147483649 running/enabled 16931421988 PM_BR_MPRED_CCACHE: result 2147483649 running/enabled 16931416478 Miss percent 100 % OK - Measured branch prediction rates match reported spectre v2 mitigation. success: spectre_v2Signed-off-by: Michael Ellerman Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20190520105520.22274-1-mpe@ellerman.id.au List of files: /linux-6.15/tools/testing/selftests/powerpc/security/Makefile

a0aebae0 - selftests: powerpc: Fix warning for security subdir

Mon, 22 Oct 2018 12:09:26 +0000

selftests: powerpc: Fix warning for security subdirtyping 'make' inside tools/testing/selftests/powerpc gave a buildwarning:BUILD_TARGET=tools/testing/selftests/powerpc/security; mkdir -p $BUILD_TARGET; make OUTPUT=$BUILD_TARGET -k -C security allmake[1]: Entering directory 'tools/testing/selftests/powerpc/security'../../lib.mk:20: ../../../../scripts/subarch.include: No such file or directorymake[1]: *** No rule to make target '../../../../scripts/subarch.include'.make[1]: Failed to remake makefile '../../../../scripts/subarch.include'.The build is one level deeper than lib.mk thinks it is. Set top_srcdirto set things straight.Note that the test program is still built.Signed-off-by: Joel Stanley Signed-off-by: Michael Ellerman List of files: /linux-6.15/tools/testing/selftests/powerpc/security/Makefile

d2bf7932 - selftests/powerpc: Add test to verify rfi flush across a system call

Mon, 21 May 2018 15:13:57 +0000

selftests/powerpc: Add test to verify rfi flush across a system callThis adds a test to verify proper functioning of the rfi flushcapability implemented to mitigate meltdown. The test works bymeasuring the number of L1d cache misses encountered while loadingdata from memory. Across a system call, since the L1d cache is flushedwhen rfi_flush is enabled, the number of cache misses is expected tobe relative to the number of cachelines corresponding to the databeing loaded.The current system setting is reflected via powerpc/rfi_flush underdebugfs (assumed to be /sys/kernel/debug/). This test verifies theexpected result with rfi_flush enabled as well as when it is disabled.Signed-off-by: Anton Blanchard Signed-off-by: Michael Ellerman Signed-off-by: Naveen N. Rao [mpe: Add SPDX tags, clang format, skip if the debugfs is missing, use __u64 and SANE_USERSPACE_TYPES to avoid printf() build errors.]Signed-off-by: Michael Ellerman List of files: /linux-6.15/tools/testing/selftests/powerpc/security/Makefile