diff mbox series

[RFC,v3,17/58] perf: core/x86: Plumb passthrough PMU capability from x86_pmu to x86_pmu_cap

Message ID 20240801045907.4010984-18-mizhang@google.com (mailing list archive)
State New, archived
Headers show
Series Mediated Passthrough vPMU 3.0 for x86 | expand

Commit Message

Mingwei Zhang Aug. 1, 2024, 4:58 a.m. UTC 
Plumb passthrough PMU capability to x86_pmu_cap in order to let any kernel
entity such as KVM know that host PMU support passthrough PMU mode and has
the implementation.

Signed-off-by: Mingwei Zhang <mizhang@google.com>
Signed-off-by: Dapeng Mi <dapeng1.mi@linux.intel.com>
Tested-by: Yongwei Ma <yongwei.ma@intel.com>
---
 arch/x86/events/core.c            | 1 +
 arch/x86/include/asm/perf_event.h | 1 +
 2 files changed, 2 insertions(+)
diff mbox series

Patch

diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c
index cb5d8f5fd9ce..c16ceebf2d70 100644
--- a/arch/x86/events/core.c
+++ b/arch/x86/events/core.c
@@ -3029,6 +3029,7 @@  void perf_get_x86_pmu_capability(struct x86_pmu_capability *cap)
 	cap->events_mask	= (unsigned int)x86_pmu.events_maskl;
 	cap->events_mask_len	= x86_pmu.events_mask_len;
 	cap->pebs_ept		= x86_pmu.pebs_ept;
+	cap->passthrough = !!(pmu.capabilities & PERF_PMU_CAP_PASSTHROUGH_VPMU);
 }
 EXPORT_SYMBOL_GPL(perf_get_x86_pmu_capability);
 
diff --git a/arch/x86/include/asm/perf_event.h b/arch/x86/include/asm/perf_event.h
index 7f1e17250546..5cf37fe1f30a 100644
--- a/arch/x86/include/asm/perf_event.h
+++ b/arch/x86/include/asm/perf_event.h
@@ -258,6 +258,7 @@  struct x86_pmu_capability {
 	unsigned int	events_mask;
 	int		events_mask_len;
 	unsigned int	pebs_ept	:1;
+	unsigned int	passthrough	:1;
 };
 
 /*