diff options
| author | Sean Christopherson <seanjc@google.com> | 2023-03-22 04:14:38 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2023-04-06 20:37:36 +0300 |
| commit | 903358c7eddb9a8a83013f967909805e6af050d4 (patch) | |
| tree | 922d0a6222910c5c5eeff0f4bf48978c2b25d1b5 /arch/x86/kvm/x86.c | |
| parent | bff903e8cd743cddb42ef1690edd33130f12c40a (diff) | |
| download | linux-903358c7eddb9a8a83013f967909805e6af050d4.tar.xz | |
KVM: x86: Move MSR_IA32_PRED_CMD WRMSR emulation to common code
Dedup the handling of MSR_IA32_PRED_CMD across VMX and SVM by moving the
logic to kvm_set_msr_common(). Now that the MSR interception toggling is
handled as part of setting guest CPUID, the VMX and SVM paths are
identical.
Opportunistically massage the code to make it a wee bit denser.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Xiaoyao Li <xiaoyao.li@intel.com>
Message-Id: <20230322011440.2195485-5-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/x86.c')
| -rw-r--r-- | arch/x86/kvm/x86.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 237c483b1230..c83ec88da043 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -3617,6 +3617,17 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info) vcpu->arch.perf_capabilities = data; kvm_pmu_refresh(vcpu); return 0; + case MSR_IA32_PRED_CMD: + if (!msr_info->host_initiated && !guest_has_pred_cmd_msr(vcpu)) + return 1; + + if (!boot_cpu_has(X86_FEATURE_IBPB) || (data & ~PRED_CMD_IBPB)) + return 1; + if (!data) + break; + + wrmsrl(MSR_IA32_PRED_CMD, PRED_CMD_IBPB); + break; case MSR_EFER: return set_efer(vcpu, msr_info); case MSR_K7_HWCR: |