selftests/x86/xstate: Refactor ptrace ABI test

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Following the refactoring of the context switching test, the ptrace test is
another component reusable for other xstate features. As part of this
restructuring, add a missing check to validate the
user_xstateregs->xstate_fx_sw field in the ABI.

Also, replace err() and fatal_error() with ksft_exit_fail_msg() for
consistency in error handling.

  Expected output:
  $ amx_64
  ...
  [RUN]   AMX Tile data: inject xstate via ptrace().
  [OK]    'xfeatures' in SW reserved area was correctly written
  [OK]    xstate was correctly updated.

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/20250226010731.2456-6-chang.seok.bae@intel.com

...

This commit is contained in:

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

parent 40f6852ef2

commit 7cb2fbe419

3 changed files with 131 additions and 107 deletions

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108

tools/testing/selftests/x86/amx.c

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129

tools/testing/selftests/x86/xstate.c

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1

tools/testing/selftests/x86/xstate.h

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