diff options
Diffstat (limited to 'drivers/bus/arm-ccn.c')
| -rw-r--r-- | drivers/bus/arm-ccn.c | 56 |
1 files changed, 29 insertions, 27 deletions
diff --git a/drivers/bus/arm-ccn.c b/drivers/bus/arm-ccn.c index 6f550d9e7a2d..aaa0f2a87118 100644 --- a/drivers/bus/arm-ccn.c +++ b/drivers/bus/arm-ccn.c @@ -57,6 +57,7 @@ #define CCN_DT_PMCCNTRSR 0x0190 #define CCN_DT_PMOVSR 0x0198 #define CCN_DT_PMOVSR_CLR 0x01a0 +#define CCN_DT_PMOVSR_CLR__MASK 0x1f #define CCN_DT_PMCR 0x01a8 #define CCN_DT_PMCR__OVFL_INTR_EN (1 << 6) #define CCN_DT_PMCR__PMU_EN (1 << 0) @@ -586,6 +587,30 @@ static int arm_ccn_pmu_type_eq(u32 a, u32 b) return 0; } +static void arm_ccn_pmu_event_destroy(struct perf_event *event) +{ + struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu); + struct hw_perf_event *hw = &event->hw; + + if (hw->idx == CCN_IDX_PMU_CYCLE_COUNTER) { + clear_bit(CCN_IDX_PMU_CYCLE_COUNTER, ccn->dt.pmu_counters_mask); + } else { + struct arm_ccn_component *source = + ccn->dt.pmu_counters[hw->idx].source; + + if (CCN_CONFIG_TYPE(event->attr.config) == CCN_TYPE_XP && + CCN_CONFIG_EVENT(event->attr.config) == + CCN_EVENT_WATCHPOINT) + clear_bit(hw->config_base, source->xp.dt_cmp_mask); + else + clear_bit(hw->config_base, source->pmu_events_mask); + clear_bit(hw->idx, ccn->dt.pmu_counters_mask); + } + + ccn->dt.pmu_counters[hw->idx].source = NULL; + ccn->dt.pmu_counters[hw->idx].event = NULL; +} + static int arm_ccn_pmu_event_init(struct perf_event *event) { struct arm_ccn *ccn; @@ -599,6 +624,7 @@ static int arm_ccn_pmu_event_init(struct perf_event *event) return -ENOENT; ccn = pmu_to_arm_ccn(event->pmu); + event->destroy = arm_ccn_pmu_event_destroy; if (hw->sample_period) { dev_warn(ccn->dev, "Sampling not supported!\n"); @@ -731,30 +757,6 @@ static int arm_ccn_pmu_event_init(struct perf_event *event) return 0; } -static void arm_ccn_pmu_event_free(struct perf_event *event) -{ - struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu); - struct hw_perf_event *hw = &event->hw; - - if (hw->idx == CCN_IDX_PMU_CYCLE_COUNTER) { - clear_bit(CCN_IDX_PMU_CYCLE_COUNTER, ccn->dt.pmu_counters_mask); - } else { - struct arm_ccn_component *source = - ccn->dt.pmu_counters[hw->idx].source; - - if (CCN_CONFIG_TYPE(event->attr.config) == CCN_TYPE_XP && - CCN_CONFIG_EVENT(event->attr.config) == - CCN_EVENT_WATCHPOINT) - clear_bit(hw->config_base, source->xp.dt_cmp_mask); - else - clear_bit(hw->config_base, source->pmu_events_mask); - clear_bit(hw->idx, ccn->dt.pmu_counters_mask); - } - - ccn->dt.pmu_counters[hw->idx].source = NULL; - ccn->dt.pmu_counters[hw->idx].event = NULL; -} - static u64 arm_ccn_pmu_read_counter(struct arm_ccn *ccn, int idx) { u64 res; @@ -1027,8 +1029,6 @@ static int arm_ccn_pmu_event_add(struct perf_event *event, int flags) static void arm_ccn_pmu_event_del(struct perf_event *event, int flags) { arm_ccn_pmu_event_stop(event, PERF_EF_UPDATE); - - arm_ccn_pmu_event_free(event); } static void arm_ccn_pmu_event_read(struct perf_event *event) @@ -1052,7 +1052,8 @@ static irqreturn_t arm_ccn_pmu_overflow_handler(struct arm_ccn_dt *dt) struct perf_event *event = dt->pmu_counters[idx].event; int overflowed = pmovsr & BIT(idx); - WARN_ON_ONCE(overflowed && !event); + WARN_ON_ONCE(overflowed && !event && + idx != CCN_IDX_PMU_CYCLE_COUNTER); if (!event || !overflowed) continue; @@ -1088,6 +1089,7 @@ static int arm_ccn_pmu_init(struct arm_ccn *ccn) /* Initialize DT subsystem */ ccn->dt.base = ccn->base + CCN_REGION_SIZE; spin_lock_init(&ccn->dt.config_lock); + writel(CCN_DT_PMOVSR_CLR__MASK, ccn->dt.base + CCN_DT_PMOVSR_CLR); writel(CCN_DT_CTL__DT_EN, ccn->dt.base + CCN_DT_CTL); writel(CCN_DT_PMCR__OVFL_INTR_EN | CCN_DT_PMCR__PMU_EN, ccn->dt.base + CCN_DT_PMCR); |