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KVM: SVM: reorganize svm_interrupt_allowed

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This patch reorganizes the logic in svm_interrupt_allowed to
make it better to read. This is important because the logic
is a lot more complicated with Nested SVM.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Joerg Roedel 2009-09-16 15:24:15 +02:00 committed by Avi Kivity
parent bfc33beaed
commit 7fcdb5103d
1 changed files with 12 additions and 4 deletions
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16
arch/x86/kvm/svm.c
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@ -2472,10 +2472,18 @@ static int svm_interrupt_allowed(struct kvm_vcpu *vcpu)
{
struct vcpu_svm *svm = to_svm(vcpu);
struct vmcb *vmcb = svm->vmcb;
return (vmcb->save.rflags & X86_EFLAGS_IF) &&
!(vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK) &&
gif_set(svm) &&
!(is_nested(svm) && (svm->vcpu.arch.hflags & HF_VINTR_MASK));
int ret;
if (!gif_set(svm) ||
(vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK))
return 0;
ret = !!(vmcb->save.rflags & X86_EFLAGS_IF);
if (is_nested(svm))
return ret && !(svm->vcpu.arch.hflags & HF_VINTR_MASK);
return ret;
}
static void enable_irq_window(struct kvm_vcpu *vcpu)