hulk inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I8T2RT -------------------------------- To support the MB monitoring feature, provide mbm_total_bytes interface under the resctrl fs to monitor the MATA memory bandwidth. To accommodate platforms where the number of MATA monitor resources is less than the number of closids, which prevents support for MB(Memory Bandwidth) monitoring features, we have removed this constraint. This allows bandwidth monitoring to operate in non-free running mode. Fixes: dc2005d467b3 ("untested: arm_mpam: resctrl: Add support for mbm counters") Signed-off-by: Zeng Heng <zengheng4@huawei.com> --- drivers/platform/mpam/mpam_resctrl.c | 8 -------- 1 file changed, 8 deletions(-) diff --git a/drivers/platform/mpam/mpam_resctrl.c b/drivers/platform/mpam/mpam_resctrl.c index b42cabffb277..ad36036c0765 100644 --- a/drivers/platform/mpam/mpam_resctrl.c +++ b/drivers/platform/mpam/mpam_resctrl.c @@ -473,14 +473,6 @@ static bool class_has_usable_mbwu(struct mpam_class *class) if (!mpam_has_feature(mpam_feat_msmon_mbwu, cprops)) return false; - /* - * resctrl expects the bandwidth counters to be free running, - * which means we need as many monitors as resctrl has - * control/monitor groups. - */ - if (cprops->num_mbwu_mon < resctrl_arch_system_num_rmid_idx()) - return false; - return (mpam_partid_max > 1) || (mpam_pmg_max != 0); } -- 2.25.1