Re: [PATCH v2 01/29] ACPI / PPTT: Add a helper to fill a cpumask from a processor container

James Morse
2025-10-10T16:55:29Z

Hi Gavin,

On 03/10/2025 01:15, Gavin Shan wrote:
> On 9/11/25 6:42 AM, James Morse wrote:
>> The ACPI MPAM table uses the UID of a processor container specified in
>> the PPTT to indicate the subset of CPUs and cache topology that can
>> access each MPAM System Component (MSC).
>>
>> This information is not directly useful to the kernel. The equivalent
>> cpumask is needed instead.
>>
>> Add a helper to find the processor container by its id, then walk
>> the possible CPUs to fill a cpumask with the CPUs that have this
>> processor container as a parent.

> With the description for the return value of acpi_pptt_get_cpus_from_container()
> is dropped since that function doesn't have a return value, as mentioned by
> Stanimir Varbanov.
>
> Reviewed-by: Gavin Shan <gshan@redhat.com>

Thanks!

James