Re: [PATCH v2 14/29] arm_mpam: Merge supported features during mpam_enable() into mpam_class

Fenghua Yu
2025-10-05T01:28:47Z

On 9/10/25 13:42, James Morse wrote:
> To make a decision about whether to expose an mpam class as
> a resctrl resource we need to know its overall supported
> features and properties.
>
> Once we've probed all the resources, we can walk the tree
> and produce overall values by merging the bitmaps. This
> eliminates features that are only supported by some MSC
> that make up a component or class.
>
> If bitmap properties are mismatched within a component we
> cannot support the mismatched feature.
>
> Care has to be taken as vMSC may hold mismatched RIS.
>
> Signed-off-by: James Morse <james.morse@arm.com>
> Reviewed-by: Ben Horgan <ben.horgan@arm.com>

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

Thanks.

-Fenghua