Re: [PATCH v3 3/3] selftests/resctrl: Recognise aarch64 as a vendor for L3_NONCONT_CAT

[Reinette Chatre]

Hi Richard,

On 5/28/26 7:23 PM, Richard Cheng wrote:
> aarch64 has no vendor_id in /proc/cpuinfo, so detect_vendor() returns 0
> and arch_supports_noncont_cat() falls through to "return false".
> L3_NONCONT_CAT therefore spuriously fails on every ARM MPAM platform.
> 
> Define ARCH_ARM, short-circuit detect_vendor() to it on aarch64, and
> add it to the AMD/Hygon always-supports early-out in
> arch_supports_noncont_cat().
> 
> aarch64 has many implementers (ARM 0x41, NVIDIA 0x43, etc.), but MPAM
> mandates non-contiguous CPBM uniformly, so per-implementer handling is
> not needed here.
> 
> Signed-off-by: Richard Cheng <icheng@xxxxxxxxxx>
> ---

Reviewed-by: Reinette Chatre <reinette.chatre@xxxxxxxxx>

Reinette