Re: [PATCH v2 19/29] arm_mpam: Use a static key to indicate when mpam is enabled

Ben Horgan
2025-09-12T14:43:05Z

Hi James,

On 9/10/25 21:42, James Morse wrote:
> 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 repsonse 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@arm.com>
> ---
> drivers/resctrl/mpam_devices.c | 12 ++++++++++++
> drivers/resctrl/mpam_internal.h | 8 ++++++++
> 2 files changed, 20 insertions(+)
>

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

Thanks,

Ben