drivers: perf: added capabilities for legacy PMU

Added the PERF_PMU_CAP_NO_INTERRUPT flag because the legacy pmu driver does not provide sampling capabilities Added the PERF_PMU_CAP_NO_EXCLUDE flag because the legacy pmu driver does not provide the ability to disable counter incrementation in different privilege modes Suggested-by: Atish Patra <[email protected]> Signed-off-by: Vadim Shakirov <[email protected]> Reviewed-by: Atish Patra <[email protected]> Fixes: 9b3e150 ("RISC-V: Add a simple platform driver for RISC-V legacy perf") Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Palmer Dabbelt <[email protected]>
NeroReflex · Feb 27, 2024 · 65730fe · 65730fe
1 parent 6613476
commit 65730fe
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/drivers/perf/riscv_pmu_legacy.c b/drivers/perf/riscv_pmu_legacy.c
@@ -117,6 +117,8 @@ static void pmu_legacy_init(struct riscv_pmu *pmu)
 	pmu->event_mapped = pmu_legacy_event_mapped;
 	pmu->event_unmapped = pmu_legacy_event_unmapped;
 	pmu->csr_index = pmu_legacy_csr_index;
+	pmu->pmu.capabilities |= PERF_PMU_CAP_NO_INTERRUPT;
+	pmu->pmu.capabilities |= PERF_PMU_CAP_NO_EXCLUDE;
 
 	perf_pmu_register(&pmu->pmu, "cpu", PERF_TYPE_RAW);
 }