[PATCH 0/2] kselftest/arm64: vec-syscfg exit status and VL inheritance coverage

[Abdalla Eldoumani <aamsdoumani@gmail.com>]

From: Abdalla Eldoumani <abdalla.eldoumani@ucalgary.ca>

Two small changes to the vector length configuration test.

The first makes vec-syscfg report failures through its exit status. It
currently always exits 0, so a kernel that fails its checks still shows
as passing in the kselftest runner.

The second implements the "Test PR_SVE_VL_INHERIT after a double fork"
item from the fp TODO list by also checking the VL in a grandchild, two
fork() and exec() generations down.

Tested under QEMU (-cpu max, -cpu max,sme=off and -cpu cortex-a57) on
mainline (58161ead2, after v7.3-rc7). To check that the new test can
fail, it was also run on a kernel modified to clear the inherit flag on
exec(): the existing check passed, the new check failed for SVE and SME,
and vec-syscfg exited 1.

Assisted-by: LLM

Abdalla Eldoumani (2):
  kselftest/arm64: Report test failures in vec-syscfg's exit status
  kselftest/arm64: Check that PR_SVE_VL_INHERIT survives a second exec

 tools/testing/selftests/arm64/fp/TODO         |  1 -
 tools/testing/selftests/arm64/fp/vec-syscfg.c | 64 +++++++++++++++++--
 2 files changed, 60 insertions(+), 5 deletions(-)


base-commit: 58161ead29e50d70a317ea26b472e0c7508e69da
-- 
2.49.0.windows.1