diff options
| -rw-r--r-- | arch/x86/kvm/svm.c | 31 |
1 files changed, 27 insertions, 4 deletions
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index ee2ee83f3c48..61bb2cb51215 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -1502,6 +1502,27 @@ static void svm_set_irq(struct kvm_vcpu *vcpu, int irq) svm_inject_irq(svm, irq); } +static void update_cr8_intercept(struct kvm_vcpu *vcpu) +{ + struct vcpu_svm *svm = to_svm(vcpu); + struct vmcb *vmcb = svm->vmcb; + int max_irr, tpr; + + if (!irqchip_in_kernel(vcpu->kvm) || vcpu->arch.apic->vapic_addr) + return; + + vmcb->control.intercept_cr_write &= ~INTERCEPT_CR8_MASK; + + max_irr = kvm_lapic_find_highest_irr(vcpu); + if (max_irr == -1) + return; + + tpr = kvm_lapic_get_cr8(vcpu) << 4; + + if (tpr >= (max_irr & 0xf0)) + vmcb->control.intercept_cr_write |= INTERCEPT_CR8_MASK; +} + static void svm_intr_assist(struct kvm_vcpu *vcpu) { struct vcpu_svm *svm = to_svm(vcpu); @@ -1514,14 +1535,14 @@ static void svm_intr_assist(struct kvm_vcpu *vcpu) SVM_EVTINJ_VEC_MASK; vmcb->control.exit_int_info = 0; svm_inject_irq(svm, intr_vector); - return; + goto out; } if (vmcb->control.int_ctl & V_IRQ_MASK) - return; + goto out; if (!kvm_cpu_has_interrupt(vcpu)) - return; + goto out; if (!(vmcb->save.rflags & X86_EFLAGS_IF) || (vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK) || @@ -1529,12 +1550,14 @@ static void svm_intr_assist(struct kvm_vcpu *vcpu) /* unable to deliver irq, set pending irq */ vmcb->control.intercept |= (1ULL << INTERCEPT_VINTR); svm_inject_irq(svm, 0x0); - return; + goto out; } /* Okay, we can deliver the interrupt: grab it and update PIC state. */ intr_vector = kvm_cpu_get_interrupt(vcpu); svm_inject_irq(svm, intr_vector); kvm_timer_intr_post(vcpu, intr_vector); +out: + update_cr8_intercept(vcpu); } static void kvm_reput_irq(struct vcpu_svm *svm) |