[PATCH 18/33] arm_mpam: Merge supported features during mpam_enable() into mpam_class

[Ben Horgan]

Hi James,

On 8/22/25 16:29, 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 at arm.com>
> ---
>  drivers/resctrl/mpam_devices.c  | 215 ++++++++++++++++++++++++++++++++
>  drivers/resctrl/mpam_internal.h |   8 ++
>  2 files changed, 223 insertions(+)

Intricate but, as far as I can tell, all correct.

Reviewed-by: Ben Horgan <ben.horgan at arm.com>

Thanks,

Ben