diff options
| author | Ben Horgan <ben.horgan@arm.com> | 2026-09-17 15:56:08 +0100 |
|---|---|---|
| committer | James Morse <james.morse@arm.com> | 2026-10-02 17:39:30 +0100 |
| commit | b010d258f30a512a9eafaba6c50a0943f8420ab2 (patch) | |
| tree | 718d8816a4b57a68e1f315200a92d67c27f328c6 /drivers/resctrl | |
| parent | 9ced048825c7920ca235ec382658b1d87709c5b1 (diff) | |
arm_mpam: Set mpam_feat_msmon_mbwu_31counter when there are bandwidth counters
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@arm.com>
Tested-by: Gavin Shan <gshan@redhat.com>
Reviewed-by: Gavin Shan <gshan@redhat.com>
Reviewed-by: James Morse <james.morse@arm.com>
Signed-off-by: James Morse <james.morse@arm.com>
Diffstat (limited to 'drivers/resctrl')
| -rw-r--r-- | drivers/resctrl/mpam_devices.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/resctrl/mpam_devices.c b/drivers/resctrl/mpam_devices.c index 32bde94dfbc3..e349db525882 100644 --- a/drivers/resctrl/mpam_devices.c +++ b/drivers/resctrl/mpam_devices.c @@ -930,9 +930,9 @@ static void mpam_ris_hw_probe(struct mpam_msc_ris *ris) mpam_set_feature(mpam_feat_msmon_mbwu_63counter, props); else mpam_set_feature(mpam_feat_msmon_mbwu_44counter, props); - } else { - mpam_set_feature(mpam_feat_msmon_mbwu_31counter, props); } + + mpam_set_feature(mpam_feat_msmon_mbwu_31counter, props); } } } |