Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394...

[linux-2.6] / arch / x86 / kvm / svm.c

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index ee2ee83f3c4834f07609ed1cfa59685d76c50946..89e0be2c10d0ee02153fd6f72df1ebd6e31f6e7b 100644 (file)
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -513,17 +513,6 @@ static void init_vmcb(struct vcpu_svm *svm)
        control->intercept =    (1ULL << INTERCEPT_INTR) |
                                (1ULL << INTERCEPT_NMI) |
                                (1ULL << INTERCEPT_SMI) |
-               /*
-                * selective cr0 intercept bug?
-                *      0:   0f 22 d8                mov    %eax,%cr3
-                *      3:   0f 20 c0                mov    %cr0,%eax
-                *      6:   0d 00 00 00 80          or     $0x80000000,%eax
-                *      b:   0f 22 c0                mov    %eax,%cr0
-                * set cr3 ->interception
-                * get cr0 ->interception
-                * set cr0 -> no interception
-                */
-               /*              (1ULL << INTERCEPT_SELECTIVE_CR0) | */
                                (1ULL << INTERCEPT_CPUID) |
                                (1ULL << INTERCEPT_INVD) |
                                (1ULL << INTERCEPT_HLT) |
@@ -916,13 +905,6 @@ static void svm_set_segment(struct kvm_vcpu *vcpu,
 
 }
 
-/* FIXME:
-
-       svm(vcpu)->vmcb->control.int_ctl &= ~V_TPR_MASK;
-       svm(vcpu)->vmcb->control.int_ctl |= (sregs->cr8 & V_TPR_MASK);
-
-*/
-
 static int svm_guest_debug(struct kvm_vcpu *vcpu, struct kvm_debug_guest *dbg)
 {
        return -EOPNOTSUPP;
@@ -1502,6 +1484,27 @@ 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 +1517,14 @@ 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 +1532,14 @@ 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)