loongarch/kernel/perf_event.c

253 static int loongarch_pmu_alloc_counter(struct cpu_hw_events *cpuc, struct hw_perf_event *hwc)
300 				    struct hw_perf_event *hwc,
304 	u64 left = local64_read(&hwc->period_left);
305 	u64 period = hwc->sample_period;
310 		local64_set(&hwc->period_left, left);
311 		hwc->last_period = period;
316 		local64_set(&hwc->period_left, left);
317 		hwc->last_period = period;
323 		local64_set(&hwc->period_left, left);
326 	local64_set(&hwc->prev_count, loongarch_pmu.overflow - left);
336 				 struct hw_perf_event *hwc,
343 	prev_raw_count = local64_read(&hwc->prev_count);
346 	if (local64_cmpxchg(&hwc->prev_count, prev_raw_count,
353 	local64_sub(delta, &hwc->period_left);
358 	struct hw_perf_event *hwc = &event->hw;
361 		WARN_ON_ONCE(!(hwc->state & PERF_HES_UPTODATE));
363 	hwc->state = 0;
366 	loongarch_pmu_event_set_period(event, hwc, hwc->idx);
369 	loongarch_pmu_enable_event(hwc, hwc->idx);
374 	struct hw_perf_event *hwc = &event->hw;
376 	if (!(hwc->state & PERF_HES_STOPPED)) {
378 		loongarch_pmu_disable_event(hwc->idx);
380 		loongarch_pmu_event_update(event, hwc, hwc->idx);
381 		hwc->state |= PERF_HES_STOPPED | PERF_HES_UPTODATE;
389 	struct hw_perf_event *hwc = &event->hw;
394 	idx = loongarch_pmu_alloc_counter(cpuc, hwc);
408 	hwc->state = PERF_HES_STOPPED | PERF_HES_UPTODATE;
423 	struct hw_perf_event *hwc = &event->hw;
424 	int idx = hwc->idx;
437 	struct hw_perf_event *hwc = &event->hw;
440 	if (hwc->idx < 0)
443 	loongarch_pmu_event_update(event, hwc, hwc->idx);
475 	struct hw_perf_event *hwc = &event->hw;
477 	loongarch_pmu_event_update(event, hwc, idx);
479 	if (!loongarch_pmu_event_set_period(event, hwc, idx))
740 	struct hw_perf_event *hwc = &event->hw;
770 	hwc->config_base = CSR_PERFCTRL_IE;
772 	hwc->event_base = loongarch_pmu_perf_event_encode(pev);
777 		hwc->config_base |= CSR_PERFCTRL_PLV3;
778 		hwc->config_base |= CSR_PERFCTRL_PLV2;
781 		hwc->config_base |= CSR_PERFCTRL_PLV0;
784 		hwc->config_base |= CSR_PERFCTRL_PLV1;
787 	hwc->config_base &= M_PERFCTL_CONFIG_MASK;
792 	hwc->idx = -1;
793 	hwc->config = 0;
795 	if (!hwc->sample_period) {
796 		hwc->sample_period  = loongarch_pmu.max_period;
797 		hwc->last_period    = hwc->sample_period;
798 		local64_set(&hwc->period_left, hwc->sample_period);