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authorJoerg Roedel <joerg.roedel@amd.com>2009-09-16 15:24:15 +0200
committerAvi Kivity <avi@redhat.com>2009-12-03 09:32:11 +0200
commit7fcdb5103d10d2eb75876637a2efa9679cce14d3 (patch)
treef8879cd7baeab1e2d40a2dbadac8df638200ba8b /arch
parentbfc33beaed3ecf0f92612dc7fb7095029ae7722e (diff)
KVM: SVM: reorganize svm_interrupt_allowed
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>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kvm/svm.c16
1 files changed, 12 insertions, 4 deletions
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 59fe4d54da1..3f3fe815c21 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -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)