From: James Morse <james.morse@arm.com> resctrl uses resctrl_arch_rmid_read() to read counters. CDP emulation means the counter may need reading twice to get both the I and D side allocations. The same goes for reset. Add the rounding helper for checking monitor values while we're here. Signed-off-by: James Morse <james.morse@arm.com> --- drivers/platform/mpam/mpam_resctrl.c | 79 ++++++++++++++++++++++++++++ include/linux/arm_mpam.h | 4 ++ 2 files changed, 83 insertions(+) diff --git a/drivers/platform/mpam/mpam_resctrl.c b/drivers/platform/mpam/mpam_resctrl.c index 70b1879de10a..d0140943bd9c 100644 --- a/drivers/platform/mpam/mpam_resctrl.c +++ b/drivers/platform/mpam/mpam_resctrl.c @@ -304,6 +304,85 @@ void resctrl_arch_mon_ctx_free(struct rdt_resource *r, int evtid, } } +int resctrl_arch_rmid_read(struct rdt_resource *r, struct rdt_domain *d, + u32 closid, u32 rmid, enum resctrl_event_id eventid, + u64 *val, void *arch_mon_ctx) +{ + int err; + u64 cdp_val; + struct mon_cfg cfg; + struct mpam_resctrl_dom *dom; + u32 mon = *(u32 *)arch_mon_ctx; + enum mpam_device_features type; + + resctrl_arch_rmid_read_context_check(); + + dom = container_of(d, struct mpam_resctrl_dom, resctrl_dom); + + switch (eventid) { + case QOS_L3_OCCUP_EVENT_ID: + type = mpam_feat_msmon_csu; + break; + case QOS_L3_MBM_LOCAL_EVENT_ID: + case QOS_L3_MBM_TOTAL_EVENT_ID: + type = mpam_feat_msmon_mbwu; + break; + default: + return -EINVAL; + } + + cfg.mon = mon; + if (cfg.mon == USE_RMID_IDX) + cfg.mon = resctrl_arch_rmid_idx_encode(closid, rmid); + + cfg.match_pmg = true; + cfg.pmg = rmid; + + if (cdp_enabled) { + cfg.partid = closid << 1; + err = mpam_msmon_read(dom->comp, &cfg, type, val); + if (err) + return err; + + cfg.partid += 1; + err = mpam_msmon_read(dom->comp, &cfg, type, &cdp_val); + if (!err) + *val += cdp_val; + } else { + cfg.partid = closid; + err = mpam_msmon_read(dom->comp, &cfg, type, val); + } + + return err; +} + +void resctrl_arch_reset_rmid(struct rdt_resource *r, struct rdt_domain *d, + u32 closid, u32 rmid, enum resctrl_event_id eventid) +{ + struct mon_cfg cfg; + struct mpam_resctrl_dom *dom; + + if (eventid != QOS_L3_MBM_LOCAL_EVENT_ID) + return; + + cfg.mon = resctrl_arch_rmid_idx_encode(closid, rmid); + cfg.match_pmg = true; + cfg.pmg = rmid; + + dom = container_of(d, struct mpam_resctrl_dom, resctrl_dom); + + if (cdp_enabled) { + cfg.partid = closid << 1; + mpam_msmon_reset_mbwu(dom->comp, &cfg); + + cfg.partid += 1; + mpam_msmon_reset_mbwu(dom->comp, &cfg); + } else { + cfg.partid = closid; + mpam_msmon_reset_mbwu(dom->comp, &cfg); + } +} + static bool cache_has_usable_cpor(struct mpam_class *class) { struct mpam_props *cprops = &class->props; diff --git a/include/linux/arm_mpam.h b/include/linux/arm_mpam.h index 7206a35bb205..0f2522c2b11c 100644 --- a/include/linux/arm_mpam.h +++ b/include/linux/arm_mpam.h @@ -50,6 +50,10 @@ int mpam_register_requestor(u16 partid_max, u8 pmg_max); int mpam_ris_create(struct mpam_msc *msc, u8 ris_idx, enum mpam_class_types type, u8 class_id, int component_id); +static inline unsigned int resctrl_arch_round_mon_val(unsigned int val) +{ + return val; +} bool resctrl_arch_alloc_capable(void); bool resctrl_arch_mon_capable(void); -- 2.25.1