diff options
Diffstat (limited to 'arch/x86/kvm')
| -rw-r--r-- | arch/x86/kvm/pmu.c | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/arch/x86/kvm/pmu.c b/arch/x86/kvm/pmu.c index f38ad84..bd5dbd9 100644 --- a/arch/x86/kvm/pmu.c +++ b/arch/x86/kvm/pmu.c @@ -348,22 +348,34 @@ int kvm_pmu_is_valid_msr_idx(struct kvm_vcpu *vcpu, unsigned idx) (fixed && idx >= pmu->nr_arch_fixed_counters); } -int kvm_pmu_rdpmc(struct kvm_vcpu *vcpu, unsigned idx, u64 *data) +static struct kvm_pmc *kvm_pmu_msr_idx_to_pmc(struct kvm_vcpu *vcpu, + unsigned idx) { struct kvm_pmu *pmu = vcpu_to_pmu(vcpu); - bool fast_mode = idx & (1u << 31); bool fixed = idx & (1u << 30); struct kvm_pmc *counters; - u64 ctr_val; idx &= ~(3u << 30); if (!fixed && idx >= pmu->nr_arch_gp_counters) - return 1; + return NULL; if (fixed && idx >= pmu->nr_arch_fixed_counters) - return 1; + return NULL; counters = fixed ? pmu->fixed_counters : pmu->gp_counters; - ctr_val = pmc_read_counter(&counters[idx]); + return &counters[idx]; +} + +int kvm_pmu_rdpmc(struct kvm_vcpu *vcpu, unsigned idx, u64 *data) +{ + bool fast_mode = idx & (1u << 31); + struct kvm_pmc *pmc; + u64 ctr_val; + + pmc = kvm_pmu_msr_idx_to_pmc(vcpu, idx); + if (!pmc) + return 1; + + ctr_val = pmc_read_counter(pmc); if (fast_mode) ctr_val = (u32)ctr_val; |
