Re: [PATCH v2 03/12] arm_mpam: Set mpam_feat_msmon_mbwu_31counter when there are bandwidth counters

[Gavin Shan]

On 9/18/26 12:56 AM, Ben Horgan wrote:
> When MPAMF_MSMON_IDR.MSMON_MBWU is 1, MSMON_MBWU is present and has a VALUE
> field of 31 bits. If additionally, MPAMF_MBWUMON_IDR.HAS_LONG is 1, then
> MSMON_MBWU_L is also present and has a VALUE field of 44 or 63 bits as
> indicated by MPAMF_MBWUMON_IDR.LWD. Hence, if there are memory bandwidth
> counters then there are always 31 bit counters irrespective of whether
> there also long counters.
>
> Set the 31 bit bandwidth counter feature bit whenever there are bandwidth
> counters.
>
> Fixes: fdc29a141d63 ("arm_mpam: Probe for long/lwd mbwu counters")
> Signed-off-by: Ben Horgan <ben.horgan@xxxxxxx>
> Tested-by: Gavin Shan <gshan@xxxxxxxxxx>
> ---
>   drivers/resctrl/mpam_devices.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
Reviewed-by: Gavin Shan <gshan@xxxxxxxxxx>