diff --git a/drivers/perf/arm_spe_pmu.c b/drivers/perf/arm_spe_pmu.c index abd23430dc03..2fce871a1882 100644 --- a/drivers/perf/arm_spe_pmu.c +++ b/drivers/perf/arm_spe_pmu.c @@ -102,6 +102,8 @@ struct arm_spe_pmu { /* Keep track of our dynamic hotplug state */ static enum cpuhp_state arm_spe_pmu_online; +static void arm_spe_pmu_stop(struct perf_event *event, int flags); + enum arm_spe_pmu_buf_fault_action { SPE_PMU_BUF_FAULT_ACT_SPURIOUS, SPE_PMU_BUF_FAULT_ACT_FATAL, @@ -497,8 +499,8 @@ static u64 arm_spe_pmu_next_off(struct perf_output_handle *handle) return limit; } -static void arm_spe_perf_aux_output_begin(struct perf_output_handle *handle, - struct perf_event *event) +static int arm_spe_perf_aux_output_begin(struct perf_output_handle *handle, + struct perf_event *event) { u64 base, limit; struct arm_spe_pmu_buf *buf; @@ -506,7 +508,6 @@ static void arm_spe_perf_aux_output_begin(struct perf_output_handle *handle, /* Start a new aux session */ buf = perf_aux_output_begin(handle, event); if (!buf) { - event->hw.state |= PERF_HES_STOPPED; /* * We still need to clear the limit pointer, since the * profiler might only be disabled by virtue of a fault. @@ -526,6 +527,7 @@ static void arm_spe_perf_aux_output_begin(struct perf_output_handle *handle, out_write_limit: write_sysreg_s(limit, SYS_PMBLIMITR_EL1); + return (limit & PMBLIMITR_EL1_E) ? 0 : -EIO; } static void arm_spe_perf_aux_output_end(struct perf_output_handle *handle) @@ -665,7 +667,10 @@ static irqreturn_t arm_spe_pmu_irq_handler(int irq, void *dev) * when we get to it. */ if (!(handle->aux_flags & PERF_AUX_FLAG_TRUNCATED)) { - arm_spe_perf_aux_output_begin(handle, event); + if (arm_spe_perf_aux_output_begin(handle, event)) { + arm_spe_pmu_stop(event, PERF_EF_UPDATE); + break; + } isb(); } break; @@ -760,9 +765,10 @@ static void arm_spe_pmu_start(struct perf_event *event, int flags) struct perf_output_handle *handle = this_cpu_ptr(spe_pmu->handle); hwc->state = 0; - arm_spe_perf_aux_output_begin(handle, event); - if (hwc->state) + if (arm_spe_perf_aux_output_begin(handle, event)) { + arm_spe_pmu_stop(event, 0); return; + } reg = arm_spe_event_to_pmsfcr(event); write_sysreg_s(reg, SYS_PMSFCR_EL1);