Re: [PATCH 22/33] arm_mpam: Use a static key to indicate when mpam is enabled

[Gavin Shan]

On 11/7/25 10:34 PM, Ben Horgan wrote:
> From: James Morse <james.morse@xxxxxxx>
>
> Once all the MSC have been probed, the system wide usable number of
> PARTID is known and the configuration arrays can be allocated.
>
> After this point, checking all the MSC have been probed is pointless,
> and the cpuhp callbacks should restore the configuration, instead of
> just resetting the MSC.
>
> Add a static key to enable this behaviour. This will also allow MPAM
> to be disabled in response to an error, and the architecture code to
> enable/disable the context switch of the MPAM system registers.
>
> Signed-off-by: James Morse <james.morse@xxxxxxx>
> Reviewed-by: Jonathan Cameron <jonathan.cameron@xxxxxxxxxx>
> Reviewed-by: Ben Horgan <ben.horgan@xxxxxxx>
> Reviewed-by: Fenghua Yu <fenghuay@xxxxxxxxxx>
> Tested-by: Fenghua Yu <fenghuay@xxxxxxxxxx>
> Tested-by: Shaopeng Tan <tan.shaopeng@xxxxxxxxxxxxxx>
> Tested-by: Peter Newman <peternewman@xxxxxxxxxx>
> Signed-off-by: Ben Horgan <ben.horgan@xxxxxxx>
> ---
>   drivers/resctrl/mpam_devices.c  | 12 ++++++++++++
>   drivers/resctrl/mpam_internal.h |  8 ++++++++
>   2 files changed, 20 insertions(+)

Reviewed-by: Gavin Shan <gshan@xxxxxxxxxx>