Re: [PATCH 19/33] arm_mpam: Add a helper to touch an MSC from any CPU

[Gavin Shan]

On 11/7/25 10:34 PM, Ben Horgan wrote:
> From: James Morse <james.morse@xxxxxxx>
>
> Resetting RIS entries from the cpuhp callback is easy as the
> callback occurs on the correct CPU. This won't be true for any other
> caller that wants to reset or configure an MSC.
>
> Add a helper that schedules the provided function if necessary.
>
> Callers should take the cpuhp lock to prevent the cpuhp callbacks from
> changing the MSC state.
>
> Signed-off-by: James Morse <james.morse@xxxxxxx>
> Reviewed-by: Ben Horgan <ben.horgan@xxxxxxx>
> Reviewed-by: Jonathan Cameron <jonathan.cameron@xxxxxxxxxx>
> 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 | 37 +++++++++++++++++++++++++++++++---
>   1 file changed, 34 insertions(+), 3 deletions(-)

Reviewed-by: Gavin Shan <gshan@xxxxxxxxxx>