[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 at arm.com>
> 
> 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 at arm.com>
> Reviewed-by: Ben Horgan <ben.horgan at arm.com>
> Reviewed-by: Jonathan Cameron <jonathan.cameron at huawei.com>
> Reviewed-by: Fenghua Yu <fenghuay at nvidia.com>
> Tested-by: Fenghua Yu <fenghuay at nvidia.com>
> Tested-by: Shaopeng Tan <tan.shaopeng at jp.fujitsu.com>
> Tested-by: Peter Newman <peternewman at google.com>
> Signed-off-by: Ben Horgan <ben.horgan at arm.com>
> ---
>   drivers/resctrl/mpam_devices.c | 37 +++++++++++++++++++++++++++++++---
>   1 file changed, 34 insertions(+), 3 deletions(-)
> 

Reviewed-by: Gavin Shan <gshan at redhat.com>