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@xxxxxxxxxx>
Signed-off-by: Dapeng Mi <dapeng1.mi@xxxxxxxxxxxxxxx>
Tested-by: Yongwei Ma <yongwei.ma@xxxxxxxxx>
---
arch/x86/events/core.c | 1 +
arch/x86/include/asm/perf_event.h | 1 +
2 files changed, 2 insertions(+)
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;
};
/*
--
2.46.0.rc1.232.g9752f9e123-goog
