Re: [PATCH v2 02/12] arm_mpam: Restore the error interrupt enable from mpam_cpu_online()

[Gavin Shan]

On 9/18/26 12:56 AM, Ben Horgan wrote:
> When all the associated CPUs to an MSC are offline, possibly caused by
> PSCI_CPU_OFF, the power supply to the MSC can be cut off and all the
> registers that are unknown out of reset, including MPAMF_ECR.INTEN, are
> lost. Afterwards, we need to explicitly set MPAMF_ECR.INTEN when the first
> associated CPU becomes online and the power supply to the MSC is recovered.
>
> Restore MPAMF_ECR.INTEN in mpam_cpu_online() when the first associated CPU
> of the MSC becomes online.
>
> Fixes: 49aa621c4dca ("arm_mpam: Register and enable IRQs")
> Signed-off-by: Ben Horgan <ben.horgan@xxxxxxx>
> Tested-by: Gavin Shan <gshan@xxxxxxxxxx>
> ---
> Changes since v1:
> Update the commit message (Gavin)
> ---
>   drivers/resctrl/mpam_devices.c | 8 +++++++-
>   1 file changed, 7 insertions(+), 1 deletion(-)
Reviewed-by: Gavin Shan <gshan@xxxxxxxxxx>