selftests/x86/xstate: Refactor context switching test

Browse source

The existing context switching and ptrace tests in amx.c are not specific
to dynamic states, making them reusable for general xstate testing.

As a first step, move the context switching test to xstate.c. Refactor
the test code to allow specifying which xstate component being tested.

To decouple the test from dynamic states, remove the permission request
code. In fact, The permission request inside the test wrapper was
redundant.

Additionally, replace fatal_error() with ksft_exit_fail_msg() for
consistency in error handling.

  Expected output:
  $ amx_64
  ...
  [RUN]   AMX Tile data: check context switches, 10 iterations, 5 threads.
  [OK]    No incorrect case was found.

Signed-off-by: Chang S. Bae <chang.seok.bae@intel.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20250226010731.2456-5-chang.seok.bae@intel.com

...

This commit is contained in:

Chang S. Bae 2025-02-25 17:07:24 -08:00 • committed by Ingo Molnar

parent 3fcb4d6146

commit 40f6852ef2

4 changed files with 204 additions and 164 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

2

tools/testing/selftests/x86/Makefile

View file

166

tools/testing/selftests/x86/amx.c

View file

198

tools/testing/selftests/x86/xstate.c

View file

2

tools/testing/selftests/x86/xstate.h

View file