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| author | Oliver Upton <oliver.upton@linux.dev> | 2024-03-05 19:48:39 +0100 |
|---|---|---|
| committer | Oliver Upton <oliver.upton@linux.dev> | 2024-03-26 09:51:44 +0100 |
| commit | e89c928bedd77d181edc2df01cb6672184775140 (patch) | |
| tree | b109ac72bd70fe91c7cb2d42afa4b0d4f2d5a854 | |
| parent | Linux 6.9-rc1 (diff) | |
| download | linux-e89c928bedd77d181edc2df01cb6672184775140.tar.xz linux-e89c928bedd77d181edc2df01cb6672184775140.zip | |
KVM: arm64: Fix host-programmed guest events in nVHE
Programming PMU events in the host that count during guest execution is
a feature supported by perf, e.g.
perf stat -e cpu_cycles:G ./lkvm run
While this works for VHE, the guest/host event bitmaps are not carried
through to the hypervisor in the nVHE configuration. Make
kvm_pmu_update_vcpu_events() conditional on whether or not _hardware_
supports PMUv3 rather than if the vCPU as vPMU enabled.
Cc: stable@vger.kernel.org
Fixes: 84d751a019a9 ("KVM: arm64: Pass pmu events to hyp via vcpu")
Reviewed-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20240305184840.636212-3-oliver.upton@linux.dev
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
| -rw-r--r-- | include/kvm/arm_pmu.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/kvm/arm_pmu.h b/include/kvm/arm_pmu.h index eb4c369a79eb..35d4ca4f6122 100644 --- a/include/kvm/arm_pmu.h +++ b/include/kvm/arm_pmu.h @@ -86,7 +86,7 @@ void kvm_vcpu_pmu_resync_el0(void); */ #define kvm_pmu_update_vcpu_events(vcpu) \ do { \ - if (!has_vhe() && kvm_vcpu_has_pmu(vcpu)) \ + if (!has_vhe() && kvm_arm_support_pmu_v3()) \ vcpu->arch.pmu.events = *kvm_get_pmu_events(); \ } while (0) |