Subject: Re: [PATCH v4 2/2] powerpc/selftests/copyloops: extend selftest to exercise __copy_tofrom_user_power7_vmx

From: Ritesh Harjani (IBM) <[email-masked]>
Date: Mon, 09 Mar 2026 10:31:44 +0530

Sayali Patil <[email-masked]> writes:

> The new PowerPC VMX fast path (__copy_tofrom_user_power7_vmx) is not
> exercised by existing copyloops selftests. This patch updates
> the selftest to exercise the VMX variant, ensuring the VMX copy path
> is validated.
>
> Changes include:
>   - COPY_LOOP=test___copy_tofrom_user_power7_vmx with -D VMX_TEST is used
>     in existing selftest build targets.
>   - Inclusion of ../utils.c to provide get_auxv_entry() for hardware
>     feature detection.
>   - At runtime, the test skips execution if Altivec is not available.
>   - Copy sizes above VMX_COPY_THRESHOLD are used to ensure the VMX
>     path is taken.
>
> This enables validation of the VMX fast path without affecting systems
> that do not support Altivec.
>
> Signed-off-by: Sayali Patil <[email-masked]>
> ---
>

The changes looks good to me. Please feel free to add:
Reviewed-by: Ritesh Harjani (IBM) <[email-masked]>