Merge branch 'x86-microcode-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

[karo-tx-linux.git] / drivers / bus / arm-ccn.c

diff --git a/drivers/bus/arm-ccn.c b/drivers/bus/arm-ccn.c
index 6f550d9e7a2dbd1258a2ba833bcda6fb97a003a2..aaa0f2a871185f139844b5fd682225a6160ba3d2 100644 (file)
--- 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);