Re: [PATCH v2 16/29] arm_mpam: Add a helper to touch an MSC from any CPU

Jonathan Cameron
2025-09-12T11:57:27Z

On Wed, 10 Sep 2025 20:42:56 +0000
James Morse <james.morse@arm.com> wrote:

> 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@arm.com>
> Reviewed-by: Ben Horgan <ben.horgan@arm.com>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>