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-rw-r--r--arch/x86/kvm/cpuid.h5
-rw-r--r--arch/x86/kvm/vmx/pmu_intel.c12
-rw-r--r--arch/x86/kvm/vmx/vmx.c2
-rw-r--r--arch/x86/kvm/vmx/vmx.h1
4 files changed, 7 insertions, 13 deletions
diff --git a/arch/x86/kvm/cpuid.h b/arch/x86/kvm/cpuid.h
index 8a770b481d9d..ac72aabba981 100644
--- a/arch/x86/kvm/cpuid.h
+++ b/arch/x86/kvm/cpuid.h
@@ -145,6 +145,11 @@ static inline int guest_cpuid_model(struct kvm_vcpu *vcpu)
return x86_model(best->eax);
}
+static inline bool cpuid_model_is_consistent(struct kvm_vcpu *vcpu)
+{
+ return boot_cpu_data.x86_model == guest_cpuid_model(vcpu);
+}
+
static inline int guest_cpuid_stepping(struct kvm_vcpu *vcpu)
{
struct kvm_cpuid_entry2 *best;
diff --git a/arch/x86/kvm/vmx/pmu_intel.c b/arch/x86/kvm/vmx/pmu_intel.c
index 83d1081cbd3c..ca219a54a53e 100644
--- a/arch/x86/kvm/vmx/pmu_intel.c
+++ b/arch/x86/kvm/vmx/pmu_intel.c
@@ -167,16 +167,6 @@ static inline struct kvm_pmc *get_fw_gp_pmc(struct kvm_pmu *pmu, u32 msr)
return get_gp_pmc(pmu, msr, MSR_IA32_PMC0);
}
-bool intel_pmu_lbr_is_compatible(struct kvm_vcpu *vcpu)
-{
- /*
- * As a first step, a guest could only enable LBR feature if its
- * cpu model is the same as the host because the LBR registers
- * would be pass-through to the guest and they're model specific.
- */
- return boot_cpu_data.x86_model == guest_cpuid_model(vcpu);
-}
-
bool intel_pmu_lbr_is_enabled(struct kvm_vcpu *vcpu)
{
struct x86_pmu_lbr *lbr = vcpu_to_lbr_records(vcpu);
@@ -595,7 +585,7 @@ static void intel_pmu_refresh(struct kvm_vcpu *vcpu)
nested_vmx_pmu_refresh(vcpu,
intel_is_valid_msr(vcpu, MSR_CORE_PERF_GLOBAL_CTRL));
- if (intel_pmu_lbr_is_compatible(vcpu))
+ if (cpuid_model_is_consistent(vcpu))
x86_perf_get_lbr(&lbr_desc->records);
else
lbr_desc->records.nr = 0;
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index d5ec0635ccd4..403a8834cc79 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -2242,7 +2242,7 @@ static int vmx_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
if ((data & PMU_CAP_LBR_FMT) !=
(vmx_get_perf_capabilities() & PMU_CAP_LBR_FMT))
return 1;
- if (!intel_pmu_lbr_is_compatible(vcpu))
+ if (!cpuid_model_is_consistent(vcpu))
return 1;
}
ret = kvm_set_msr_common(vcpu, msr_info);
diff --git a/arch/x86/kvm/vmx/vmx.h b/arch/x86/kvm/vmx/vmx.h
index 2d6d7870a974..71bcb486e73f 100644
--- a/arch/x86/kvm/vmx/vmx.h
+++ b/arch/x86/kvm/vmx/vmx.h
@@ -95,7 +95,6 @@ union vmx_exit_reason {
#define vcpu_to_lbr_records(vcpu) (&to_vmx(vcpu)->lbr_desc.records)
void intel_pmu_cross_mapped_check(struct kvm_pmu *pmu);
-bool intel_pmu_lbr_is_compatible(struct kvm_vcpu *vcpu);
bool intel_pmu_lbr_is_enabled(struct kvm_vcpu *vcpu);
int intel_pmu_create_guest_lbr_event(struct kvm_vcpu *vcpu);