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| author |   Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> | 2016-05-04 14:09:51 -0500 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2016-05-18 18:04:31 +0200 |
| commit | 3bbf3565f48ce3999b5a12cde946f81bd4475312 (patch) | |
| tree | 818e4dbe18fd8ffef375a748c57ba5ec0de2ecc1 /arch/x86/kvm/svm.c | |
| parent | svm: Do not expose x2APIC when enable AVIC (diff) | |
| download | linux-dev-3bbf3565f48ce3999b5a12cde946f81bd4475312.tar.xz linux-dev-3bbf3565f48ce3999b5a12cde946f81bd4475312.zip | |
svm: Do not intercept CR8 when enable AVIC
When enable AVIC:
* Do not intercept CR8 since this should be handled by AVIC HW.
* Also, we don't need to sync cr8/V_TPR and APIC backing page.
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
[Rename svm_in_nested_interrupt_shadow to svm_nested_virtualize_tpr. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to '')
| -rw-r--r-- | arch/x86/kvm/svm.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 7f9c4af7b012..f15a01413080 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -1092,7 +1092,8 @@ static void init_vmcb(struct vcpu_svm *svm) set_cr_intercept(svm, INTERCEPT_CR0_WRITE); set_cr_intercept(svm, INTERCEPT_CR3_WRITE); set_cr_intercept(svm, INTERCEPT_CR4_WRITE); - set_cr_intercept(svm, INTERCEPT_CR8_WRITE); + if (!kvm_vcpu_apicv_active(&svm->vcpu)) + set_cr_intercept(svm, INTERCEPT_CR8_WRITE); set_dr_intercepts(svm); @@ -4078,11 +4079,17 @@ static void svm_set_irq(struct kvm_vcpu *vcpu) SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_INTR; } +static inline bool svm_nested_virtualize_tpr(struct kvm_vcpu *vcpu) +{ + return is_guest_mode(vcpu) && (vcpu->arch.hflags & HF_VINTR_MASK); +} + static void update_cr8_intercept(struct kvm_vcpu *vcpu, int tpr, int irr) { struct vcpu_svm *svm = to_svm(vcpu); - if (is_guest_mode(vcpu) && (vcpu->arch.hflags & HF_VINTR_MASK)) + if (svm_nested_virtualize_tpr(vcpu) || + kvm_vcpu_apicv_active(vcpu)) return; clr_cr_intercept(svm, INTERCEPT_CR8_WRITE); @@ -4255,7 +4262,7 @@ static inline void sync_cr8_to_lapic(struct kvm_vcpu *vcpu) { struct vcpu_svm *svm = to_svm(vcpu); - if (is_guest_mode(vcpu) && (vcpu->arch.hflags & HF_VINTR_MASK)) + if (svm_nested_virtualize_tpr(vcpu)) return; if (!is_cr_intercept(svm, INTERCEPT_CR8_WRITE)) { @@ -4269,7 +4276,8 @@ static inline void sync_lapic_to_cr8(struct kvm_vcpu *vcpu) struct vcpu_svm *svm = to_svm(vcpu); u64 cr8; - if (is_guest_mode(vcpu) && (vcpu->arch.hflags & HF_VINTR_MASK)) + if (svm_nested_virtualize_tpr(vcpu) || + kvm_vcpu_apicv_active(vcpu)) return; cr8 = kvm_get_cr8(vcpu); |