@@ -655,24 +655,33 @@ static int arm_spe_pmu_event_init(struct perf_event *event)
u64 reg;
struct perf_event_attr *attr = &event->attr;
struct arm_spe_pmu *spe_pmu = to_spe_pmu(event->pmu);
+ struct device *dev = &spe_pmu->pdev->dev;
/* This is, of course, deeply driver-specific */
if (attr->type != event->pmu->type)
return -ENOENT;
if (event->cpu >= 0 &&
- !cpumask_test_cpu(event->cpu, &spe_pmu->supported_cpus))
+ !cpumask_test_cpu(event->cpu, &spe_pmu->supported_cpus)) {
+ dev_err_ratelimited(dev, "CPU not supported by SPE\n");
return -ENOENT;
+ }
- if (arm_spe_event_to_pmsevfr(event) & PMSEVFR_EL1_RES0)
+ if (arm_spe_event_to_pmsevfr(event) & PMSEVFR_EL1_RES0) {
+ dev_err_ratelimited(dev, "Unsupported event filter\n");
return -EOPNOTSUPP;
+ }
if (event->hw.sample_period < spe_pmu->min_period ||
- event->hw.sample_period & PMSIRR_EL1_IVAL_MASK)
+ event->hw.sample_period & PMSIRR_EL1_IVAL_MASK) {
+ dev_err_ratelimited(dev, "Cannot set sample period below the minimum interval\n");
return -EOPNOTSUPP;
+ }
- if (attr->exclude_idle)
+ if (attr->exclude_idle) {
+ dev_err_ratelimited(dev, "Cannot exclude profiling when idle\n");
return -EOPNOTSUPP;
+ }
/*
* Feedback-directed frequency throttling doesn't work when we
@@ -681,28 +690,39 @@ static int arm_spe_pmu_event_init(struct perf_event *event)
* count to reflect that. Instead, force the user to specify a
* sample period instead.
*/
- if (attr->freq)
+ if (attr->freq) {
+ dev_err_ratelimited(dev, "a sample period must be specified\n");
return -EINVAL;
+ }
if (is_kernel_in_hyp_mode()) {
- if (attr->exclude_kernel != attr->exclude_hv)
+ if (attr->exclude_kernel != attr->exclude_hv) {
+ dev_err_ratelimited(dev, "VHE is enabled but exclude_kernel and exclude_hv do not match\n");
return -EOPNOTSUPP;
+ }
} else if (!attr->exclude_hv) {
+ dev_err_ratelimited(dev, "VHE is disabled but exclude_hv is not set\n");
return -EOPNOTSUPP;
}
reg = arm_spe_event_to_pmsfcr(event);
if ((reg & BIT(PMSFCR_EL1_FE_SHIFT)) &&
- !(spe_pmu->features & SPE_PMU_FEAT_FILT_EVT))
+ !(spe_pmu->features & SPE_PMU_FEAT_FILT_EVT)) {
+ dev_err_ratelimited(dev, "event filter feature not supported\n");
return -EOPNOTSUPP;
+ }
if ((reg & BIT(PMSFCR_EL1_FT_SHIFT)) &&
- !(spe_pmu->features & SPE_PMU_FEAT_FILT_TYP))
+ !(spe_pmu->features & SPE_PMU_FEAT_FILT_TYP)) {
+ dev_err_ratelimited(dev, "event type filter feature not supported\n");
return -EOPNOTSUPP;
+ }
if ((reg & BIT(PMSFCR_EL1_FL_SHIFT)) &&
- !(spe_pmu->features & SPE_PMU_FEAT_FILT_LAT))
+ !(spe_pmu->features & SPE_PMU_FEAT_FILT_LAT)) {
+ dev_err_ratelimited(dev, "latency filter feature not supported\n");
return -EOPNOTSUPP;
+ }
return 0;
}