From: Kan Liang <kan.liang@xxxxxxxxxxxxxxx>
Define and apply the PERF_PMU_CAP_VPMU_PASSTHROUGH flag for the version 4
and later PMUs, which includes the improvements for virtualization.
Signed-off-by: Kan Liang <kan.liang@xxxxxxxxxxxxxxx>
Signed-off-by: Mingwei Zhang <mizhang@xxxxxxxxxx>
---
arch/x86/events/intel/core.c | 6 ++++++
include/linux/perf_event.h | 1 +
2 files changed, 7 insertions(+)
diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c
index a08f794a0e79..cf790c37757a 100644
--- a/arch/x86/events/intel/core.c
+++ b/arch/x86/events/intel/core.c
@@ -4662,6 +4662,9 @@ static void intel_pmu_check_hybrid_pmus(struct x86_hybrid_pmu *pmu)
else
pmu->pmu.capabilities |= ~PERF_PMU_CAP_AUX_OUTPUT;
+ if (x86_pmu.version >= 4)
+ pmu->pmu.capabilities |= PERF_PMU_CAP_VPMU_PASSTHROUGH;
+
intel_pmu_check_event_constraints(pmu->event_constraints,
pmu->num_counters,
pmu->num_counters_fixed,
@@ -6137,6 +6140,9 @@ __init int intel_pmu_init(void)
pr_cont(" AnyThread deprecated, ");
}
+ if (version >= 4)
+ x86_get_pmu(smp_processor_id())->capabilities |= PERF_PMU_CAP_VPMU_PASSTHROUGH;
+
/*
* Install the hw-cache-events table:
*/
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index afb028c54f33..60eff413dbba 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -291,6 +291,7 @@ struct perf_event_pmu_context;
#define PERF_PMU_CAP_NO_EXCLUDE 0x0040
#define PERF_PMU_CAP_AUX_OUTPUT 0x0080
#define PERF_PMU_CAP_EXTENDED_HW_TYPE 0x0100
+#define PERF_PMU_CAP_VPMU_PASSTHROUGH 0x0200
struct perf_output_handle;
--
2.34.1
