Re: [PATCH v2] selftests: x86: skip the tests if prerequisites aren't fulfilled

On 3/26/2024 1:51 PM, Shuah Khan wrote:

show that there are bo backwards compatibility issues

In older kernels lacking AMX support [1], arch_prctl() returns EINVAL. With AMX support, the kernel will properly set 'features'.

It is also worth noting that this simplification was previously acknowledged [2], albeit some time ago.

Thanks, Chang

[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i... [2] https://lore.kernel.org/lkml/de61ffdb-638a-ca84-31b5-55f6a8616597@linuxfound...