diff options
Diffstat (limited to 'arch/arm/kernel/perf_event.c')
| -rw-r--r-- | arch/arm/kernel/perf_event.c | 47 |
1 files changed, 34 insertions, 13 deletions
diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c index 8c3094d0f7b..4238bcba9d6 100644 --- a/arch/arm/kernel/perf_event.c +++ b/arch/arm/kernel/perf_event.c @@ -16,6 +16,8 @@ #include <linux/platform_device.h> #include <linux/pm_runtime.h> #include <linux/uaccess.h> +#include <linux/irq.h> +#include <linux/irqdesc.h> #include <asm/irq_regs.h> #include <asm/pmu.h> @@ -53,7 +55,12 @@ armpmu_map_cache_event(const unsigned (*cache_map) static int armpmu_map_hw_event(const unsigned (*event_map)[PERF_COUNT_HW_MAX], u64 config) { - int mapping = (*event_map)[config]; + int mapping; + + if (config >= PERF_COUNT_HW_MAX) + return -EINVAL; + + mapping = (*event_map)[config]; return mapping == HW_OP_UNSUPPORTED ? -ENOENT : mapping; } @@ -94,10 +101,6 @@ int armpmu_event_set_period(struct perf_event *event) s64 period = hwc->sample_period; int ret = 0; - /* The period may have been changed by PERF_EVENT_IOC_PERIOD */ - if (unlikely(period != hwc->last_period)) - left = period - (hwc->last_period - left); - if (unlikely(left <= -period)) { left = period; local64_set(&hwc->period_left, left); @@ -204,6 +207,8 @@ armpmu_del(struct perf_event *event, int flags) armpmu_stop(event, PERF_EF_UPDATE); hw_events->events[idx] = NULL; clear_bit(idx, hw_events->used_mask); + if (armpmu->clear_event_idx) + armpmu->clear_event_idx(hw_events, event); perf_event_update_userpage(event); } @@ -251,9 +256,11 @@ validate_event(struct pmu_hw_events *hw_events, struct perf_event *event) { struct arm_pmu *armpmu = to_arm_pmu(event->pmu); - struct pmu *leader_pmu = event->group_leader->pmu; - if (event->pmu != leader_pmu || event->state < PERF_EVENT_STATE_OFF) + if (is_software_event(event)) + return 1; + + if (event->state < PERF_EVENT_STATE_OFF) return 1; if (event->state == PERF_EVENT_STATE_OFF && !event->attr.enable_on_exec) @@ -292,14 +299,27 @@ validate_group(struct perf_event *event) static irqreturn_t armpmu_dispatch_irq(int irq, void *dev) { - struct arm_pmu *armpmu = (struct arm_pmu *) dev; - struct platform_device *plat_device = armpmu->plat_device; - struct arm_pmu_platdata *plat = dev_get_platdata(&plat_device->dev); + struct arm_pmu *armpmu; + struct platform_device *plat_device; + struct arm_pmu_platdata *plat; + int ret; + u64 start_clock, finish_clock; + + if (irq_is_percpu(irq)) + dev = *(void **)dev; + armpmu = dev; + plat_device = armpmu->plat_device; + plat = dev_get_platdata(&plat_device->dev); + start_clock = sched_clock(); if (plat && plat->handle_irq) - return plat->handle_irq(irq, dev, armpmu->handle_irq); + ret = plat->handle_irq(irq, dev, armpmu->handle_irq); else - return armpmu->handle_irq(irq, dev); + ret = armpmu->handle_irq(irq, dev); + finish_clock = sched_clock(); + + perf_sample_event_took(finish_clock - start_clock); + return ret; } static void @@ -390,7 +410,7 @@ __hw_perf_event_init(struct perf_event *event) */ hwc->config_base |= (unsigned long)mapping; - if (!hwc->sample_period) { + if (!is_sampling_event(event)) { /* * For non-sampling runs, limit the sample_period to half * of the counter width. That way, the new counter value @@ -569,6 +589,7 @@ perf_callchain_user(struct perf_callchain_entry *entry, struct pt_regs *regs) return; } + perf_callchain_store(entry, regs->ARM_pc); tail = (struct frame_tail __user *)regs->ARM_fp - 1; while ((entry->nr < PERF_MAX_STACK_DEPTH) && |