Re: [PATCH v1 06/11] arm_mpam: Use __ris_msmon_read() for saving MBWU state

[Gavin Shan]

On 7/10/26 9:55 PM, Ben Horgan wrote:
> mbwu_save_mbwu_state() reads the MBWU counters and adds that to a saved
> correction value. However, the type of counter to read is determined by the
> RIS rather than the class and overflow is not taken into account. Fix this
> and mitigate against further divergence by using the same helper as used
> for user reads, __ris_msmon_read().
>
> Fixes: 41e8a14950e1 ("arm_mpam: Track bandwidth counter state for power management")
> Signed-off-by: Ben Horgan <ben.horgan@xxxxxxx>
> ---
>   drivers/resctrl/mpam_devices.c | 33 +++++++++++++++++++++------------
>   1 file changed, 21 insertions(+), 12 deletions(-)

Reviewed-by: Gavin Shan <gshan@xxxxxxxxxx>