linux-kernel - [PATCH v3 0/3] selftests/x86: AMX-related test improvements

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Date:   Thu, 30 Mar 2023 16:35:17 -0700
From:   "Chang S. Bae" <chang.seok.bae@...el.com>
To:     linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     shuah@...nel.org, tglx@...utronix.de, dave.hansen@...ux.intel.com,
        bp@...en8.de, chang.seok.bae@...el.com
Subject: [PATCH v3 0/3] selftests/x86: AMX-related test improvements

Dear maintainers,

Let me follow up on the last posting [5] with these two small changes:
* Clean up unused code in the AMX test.
* Fix the subsystem name in the patch1 subject.

Here is a summary of the included test code changes:

* With the STRICT_SIGALTSTACK_SIZE option [1,2], the kernel's altstack
  check becomes stringent. The x86 sigaltstack test is ignorant about
  this. Adjust the test. This check was established [3] to ensure
  every AMX task's altstack is sufficient (regardless of that option)
  [4].

* The AMX test wrongly fails on non-AMX machines. Fix the code to skip
  the test instead.

* It also has some unused code. Remove them where at this.

The series is available in this repository:
  git://github.com/intel/amx-linux.git selftest

Thanks,
Chang

[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/x86/Kconfig#n2467
[2] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/admin-guide/kernel-parameters.txt#n6038
[3] 3aac3ebea08f ("x86/signal: Implement sigaltstack size validation")
[4] 4b7ca609a33d ("x86/signal: Use fpu::__state_user_size for sigalt stack validation")
[5] https://lore.kernel.org/lkml/20220711170330.27138-1-chang.seok.bae@intel.com/

Chang S. Bae (3):
  selftests/x86/sigaltstack: Adjust the test to the kernel's altstack
    check
  selftests/x86/amx: Fix the test to avoid failure when AMX is
    unavailable
  selftests/x86/amx: Remove unneeded code

 tools/testing/selftests/x86/amx.c         | 51 +++++------------------
 tools/testing/selftests/x86/sigaltstack.c | 12 +++++-
 2 files changed, 21 insertions(+), 42 deletions(-)

base-commit: 197b6b60ae7bc51dd0814953c562833143b292aa
-- 
2.17.1