diff options
| author | Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> | 2016-05-04 14:09:50 -0500 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2016-05-18 18:04:30 +0200 |
| commit | 46781eae2e3210153476958ea023ce7b44825963 (patch) | |
| tree | 658321576a1666ba2b3be7893c2fad3cabdf4eb4 /arch/x86/kvm/svm.c | |
| parent | be8ca170edf342cc45ae4a6431ef192e5cbe211e (diff) | |
| download | op-kernel-dev-46781eae2e3210153476958ea023ce7b44825963.zip op-kernel-dev-46781eae2e3210153476958ea023ce7b44825963.tar.gz | |
svm: Do not expose x2APIC when enable AVIC
Since AVIC only virtualizes xAPIC hardware for the guest, this patch
disable x2APIC support in guest CPUID.
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/svm.c')
| -rw-r--r-- | arch/x86/kvm/svm.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 8c85b8e..7f9c4af 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -4572,14 +4572,26 @@ static u64 svm_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio) static void svm_cpuid_update(struct kvm_vcpu *vcpu) { struct vcpu_svm *svm = to_svm(vcpu); + struct kvm_cpuid_entry2 *entry; /* Update nrips enabled cache */ svm->nrips_enabled = !!guest_cpuid_has_nrips(&svm->vcpu); + + if (!kvm_vcpu_apicv_active(vcpu)) + return; + + entry = kvm_find_cpuid_entry(vcpu, 1, 0); + if (entry) + entry->ecx &= ~bit(X86_FEATURE_X2APIC); } static void svm_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry) { switch (func) { + case 0x1: + if (avic) + entry->ecx &= ~bit(X86_FEATURE_X2APIC); + break; case 0x80000001: if (nested) entry->ecx |= (1 << 2); /* Set SVM bit */ |
