kernel/tools/testing/selftests/arm64/fp/vec-syscfg.c, branch linux-rolling-stable

selftests: complete kselftest include centralization

2025-11-27T22:24:31Z

This follow-up patch completes centralization of kselftest.h and ksefltest_harness.h includes in remaining seltests files, replacing all relative paths with a non-relative paths using shared -I include path in lib.mk Tested with gcc-13.3 and clang-18.1, and cross-compiled successfully on riscv, arm64, x86_64 and powerpc arch. [reddybalavignesh9979@gmail.com: add selftests include path for kselftest.h] Link: https://lkml.kernel.org/r/20251017090201.317521-1-reddybalavignesh9979@gmail.com Link: https://lkml.kernel.org/r/20251016104409.68985-1-reddybalavignesh9979@gmail.com Signed-off-by: Bala-Vignesh-Reddy Suggested-by: Andrew Morton Link: https://lore.kernel.org/lkml/20250820143954.33d95635e504e94df01930d0@linux-foundation.org/ Reviewed-by: Wei Yang Cc: David Hildenbrand Cc: David S. Miller Cc: Eric Dumazet Cc: Günther Noack Cc: Jakub Kacinski Cc: Liam Howlett Cc: Lorenzo Stoakes Cc: Michal Hocko Cc: Mickael Salaun Cc: Ming Lei Cc: Paolo Abeni Cc: Shuah Khan Cc: Simon Horman Cc: Suren Baghdasaryan Cc: Vlastimil Babka Signed-off-by: Andrew Morton

kselftest/arm64: Remove extra blank line

2025-09-08T15:01:21Z

Remove an unnecessary blank line to improve code style consistency. ``` [command] ./scripts/checkpatch.pl --strict -f [output] CHECK: Please don't use multiple blank lines CHECK: Blank lines aren't necessary before a close brace '}' ``` Signed-off-by: Vivek Yadav Signed-off-by: Will Deacon

kselftest/arm64: Don't probe the current VL for unsupported vector types

2023-12-19T10:03:17Z

The vec-syscfg selftest verifies that setting the VL of the currently tested vector type does not disrupt the VL of the other vector type. To do this it records the current vector length for each type but neglects to guard this with a check for that vector type actually being supported. Add one, using a helper function which we also update all the other instances of this pattern. Signed-off-by: Mark Brown Link: https://lore.kernel.org/r/20231218-kselftest-arm64-vec-syscfg-rdvl-v1-1-0ac22d47e81f@kernel.org Signed-off-by: Will Deacon

kselftest/arm64: Validate that changing one VL type does not affect another

2023-07-27T15:52:06Z

On a system with both SVE and SME when we change one of the VLs this should not result in a change in the other VL. Add a check that this is in fact the case to vec-syscfg. Signed-off-by: Mark Brown Link: https://lore.kernel.org/r/20230720-arm64-fix-sve-sme-vl-change-v2-3-8eea06b82d57@kernel.org Signed-off-by: Will Deacon

kselftest/arm64: Add a test case for SVE VL changes with SME active

2023-07-27T15:52:05Z

We just fixed an issue where changing the SVE VL while SME was active could result in us attempting to save the streaming mode SVE vectors without any backing storage. Add a test case which provokes that issue, ideally we should also verify that the contents of ZA are unaffected by any of what we did. Note that since we need to keep streaming mode enabled we can't use any syscalls to trigger the issue, we have to sit in a loop in usersapce and hope to be preempted. The chosen numbers trigger with defconfig on all the virtual platforms for me, this won't be 100% on all systems but avoid an overcomplicated test implementation. Signed-off-by: Mark Brown Link: https://lore.kernel.org/r/20230720-arm64-fix-sve-sme-vl-change-v2-2-8eea06b82d57@kernel.org Signed-off-by: Will Deacon

kselftest/arm64: Extend vector configuration API tests to cover SME

2022-04-28T16:57:11Z

Provide RDVL helpers for SME and extend the main vector configuration tests to cover SME. Signed-off-by: Mark Brown Reviewed-by: Shuah Khan Acked-by: Catalin Marinas Link: https://lore.kernel.org/r/20220419112247.711548-32-broonie@kernel.org Signed-off-by: Catalin Marinas

selftests/arm64: remove ARRAY_SIZE define from vec-syscfg.c

2021-12-11T00:50:25Z

ARRAY_SIZE is defined in several selftests. Remove definitions from individual test files and include header file for the define instead. ARRAY_SIZE define is added in a separate patch to prepare for this change. Remove ARRAY_SIZE from vec-syscfg.c and pickup the one defined in kselftest.h. Signed-off-by: Shuah Khan

selftests: arm64: Verify that all possible vector lengths are handled

2021-09-29T15:33:04Z

As part of the enumeration interface for setting vector lengths it is valid to set vector lengths not supported in the system, these will be rounded to a supported vector length and returned from the prctl(). Add a test which exercises this for every valid vector length and makes sure that the return value is as expected and that this is reflected in the actual system state. Signed-off-by: Mark Brown Reviewed-by: Tomohiro Misono Link: https://lore.kernel.org/r/20210929151925.9601-5-broonie@kernel.org Signed-off-by: Will Deacon

selftests: arm64: Fix and enable test for setting current VL in vec-syscfg

2021-09-29T15:33:04Z

We had some test code for verifying that we can write the current VL via the prctl() interface but the condition for the test was inverted which wasn't noticed as it was never actually hooked up to the array of tests we execute. Fix this. Signed-off-by: Mark Brown Link: https://lore.kernel.org/r/20210929151925.9601-4-broonie@kernel.org Signed-off-by: Will Deacon

selftests: arm64: Remove bogus error check on writing to files

2021-09-29T15:33:04Z

Due to some refactoring with the error handling we ended up mangling things so we never actually set ret and therefore shouldn't be checking it. Signed-off-by: Mark Brown Link: https://lore.kernel.org/r/20210929151925.9601-3-broonie@kernel.org Signed-off-by: Will Deacon