KVM: x86/vPMU: introduce kvm_pmu_msr_idx_to_pmc
This function will be part of the kvm_pmu_ops interface. Introduce it already. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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@ -348,22 +348,34 @@ int kvm_pmu_is_valid_msr_idx(struct kvm_vcpu *vcpu, unsigned idx)
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(fixed && idx >= pmu->nr_arch_fixed_counters);
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}
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int kvm_pmu_rdpmc(struct kvm_vcpu *vcpu, unsigned idx, u64 *data)
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static struct kvm_pmc *kvm_pmu_msr_idx_to_pmc(struct kvm_vcpu *vcpu,
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unsigned idx)
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{
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struct kvm_pmu *pmu = vcpu_to_pmu(vcpu);
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bool fast_mode = idx & (1u << 31);
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bool fixed = idx & (1u << 30);
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struct kvm_pmc *counters;
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u64 ctr_val;
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idx &= ~(3u << 30);
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if (!fixed && idx >= pmu->nr_arch_gp_counters)
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return 1;
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return NULL;
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if (fixed && idx >= pmu->nr_arch_fixed_counters)
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return 1;
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return NULL;
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counters = fixed ? pmu->fixed_counters : pmu->gp_counters;
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ctr_val = pmc_read_counter(&counters[idx]);
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return &counters[idx];
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}
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int kvm_pmu_rdpmc(struct kvm_vcpu *vcpu, unsigned idx, u64 *data)
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{
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bool fast_mode = idx & (1u << 31);
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struct kvm_pmc *pmc;
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u64 ctr_val;
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pmc = kvm_pmu_msr_idx_to_pmc(vcpu, idx);
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if (!pmc)
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return 1;
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ctr_val = pmc_read_counter(pmc);
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if (fast_mode)
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ctr_val = (u32)ctr_val;
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