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

Fenghua Yu fenghuay at nvidia.com
Wed Oct 1 20:35:00 PDT 2025


On 9/10/25 13:42, 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.
>
> CC: Dave Martin <dave.martin at arm.com>
> Reviewed-by: Sudeep Holla <sudeep.holla at arm.com>
> Signed-off-by: James Morse <james.morse at arm.com>

Reviewed-by: Fenghua Yu <fenghuay at nvidia.com>

Thanks.

-Fenghua




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