Creating a helper function to check the validity of the
{HOST,GUEST}_IA32_PERF_GLOBAL_CTRL wrt the PMU's global_ctrl_mask.
Suggested-by: Jim Mattson <jmattson@xxxxxxxxxx>
Signed-off-by: Oliver Upton <oupton@xxxxxxxxxx>
---
arch/x86/kvm/pmu.h | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/arch/x86/kvm/pmu.h b/arch/x86/kvm/pmu.h
index 58265f761c3b..b7d9efff208d 100644
--- a/arch/x86/kvm/pmu.h
+++ b/arch/x86/kvm/pmu.h
@@ -79,6 +79,17 @@ static inline bool pmc_is_enabled(struct kvm_pmc *pmc)
return kvm_x86_ops->pmu_ops->pmc_is_enabled(pmc);
}
+static inline bool kvm_is_valid_perf_global_ctrl(struct kvm_vcpu *vcpu,
+ u64 global_ctrl)
+{
+ struct kvm_pmu *pmu = vcpu_to_pmu(vcpu);
+
+ if (pmu->global_ctrl_mask & global_ctrl)
+ return false;
+
+ return true;
+}
+
/* returns general purpose PMC with the specified MSR. Note that it can be
* used for both PERFCTRn and EVNTSELn; that is why it accepts base as a
* paramenter to tell them apart.
--
2.23.0.187.g17f5b7556c-goog
