On Wed, 29 Nov 2023 00:27:44 +1100, Michael Ellerman wrote:

The FPU & VMX preemption tests do not check for errors returned by the
low-level asm routines, preempt_fpu() / preempt_vsx() respectively.
That means any register corruption detected by the asm routines does not
result in a test failure.

Fix it by returning the return value of the asm routines from the
pthread child routines.

[...]

Applied to powerpc/next.

[1/5] selftests/powerpc: Fix error handling in FPU/VMX preemption tests
      https://git.kernel.org/powerpc/c/9dbd5927408c4a0707de73ae9dd9306b184e8fee
[2/5] selftests/powerpc: Check all FPRs in fpu_preempt
      https://git.kernel.org/powerpc/c/e5d00aaac651a69b8016d355123438387bfd37be
[3/5] selftests/powerpc: Generate better bit patterns for FPU tests
      https://git.kernel.org/powerpc/c/2ba107f6795d780bb54b85040a9b2c6a60fccb15
[4/5] selftests/powerpc: Run fpu_preempt test for 60 seconds
      https://git.kernel.org/powerpc/c/60d2c3af9a0c04dc2d34a62e9f5e7033b40dfed8
[5/5] selftests/powerpc: Check all FPRs in fpu_syscall test
      https://git.kernel.org/powerpc/c/1bdf22580b794a498b17617bcd7ae417d6b78444

cheers