diff mbox series

[v2,08/54] perf/x86/intel: Support PERF_PMU_CAP_PASSTHROUGH_VPMU

Message ID 20240506053020.3911940-9-mizhang@google.com (mailing list archive)
State New, archived
Headers show
Series Mediated Passthrough vPMU 2.0 for x86 | expand

Commit Message

Mingwei Zhang May 6, 2024, 5:29 a.m. UTC 
From: Kan Liang <kan.liang@linux.intel.com>

Apply the PERF_PMU_CAP_PASSTHROUGH_VPMU for Intel core PMU. It only
indicates that the perf side of core PMU is ready to support the
passthrough vPMU.  Besides the capability, the hypervisor should still need
to check the PMU version and other capabilities to decide whether to enable
the passthrough vPMU.

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
---
 arch/x86/events/intel/core.c | 5 +++++
 1 file changed, 5 insertions(+)
diff mbox series

Patch

diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c
index 768d1414897f..4d8f907a9416 100644
--- a/arch/x86/events/intel/core.c
+++ b/arch/x86/events/intel/core.c
@@ -4743,6 +4743,8 @@  static void intel_pmu_check_hybrid_pmus(struct x86_hybrid_pmu *pmu)
 	else
 		pmu->pmu.capabilities &= ~PERF_PMU_CAP_AUX_OUTPUT;
 
+	pmu->pmu.capabilities |= PERF_PMU_CAP_PASSTHROUGH_VPMU;
+
 	intel_pmu_check_event_constraints(pmu->event_constraints,
 					  pmu->num_counters,
 					  pmu->num_counters_fixed,
@@ -6242,6 +6244,9 @@  __init int intel_pmu_init(void)
 			pr_cont(" AnyThread deprecated, ");
 	}
 
+	/* The perf side of core PMU is ready to support the passthrough vPMU. */
+	x86_get_pmu(smp_processor_id())->capabilities |= PERF_PMU_CAP_PASSTHROUGH_VPMU;
+
 	/*
 	 * Install the hw-cache-events table:
 	 */