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authorGleb Natapov <gleb@redhat.com>2009-05-11 13:35:51 +0300
committerAvi Kivity <avi@redhat.com>2009-06-10 11:48:58 +0300
commit6a8b1d13121f8226783987dc7ddd861ee2245410 (patch)
tree269d5858d3a6cb842c72e408260b68fb55828461 /arch/x86/kvm
parent66fd3f7f901f29a557a473af595bf11b270b9ac2 (diff)
downloadop-kernel-dev-6a8b1d13121f8226783987dc7ddd861ee2245410.zip
op-kernel-dev-6a8b1d13121f8226783987dc7ddd861ee2245410.tar.gz
KVM: Always request IRQ/NMI window if an interrupt is pending
Currently they are not requested if there is pending exception. Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/x86/kvm')
-rw-r--r--arch/x86/kvm/x86.c30
1 files changed, 12 insertions, 18 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 73cfe87..199426c 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -3152,8 +3152,11 @@ static void update_cr8_intercept(struct kvm_vcpu *vcpu)
kvm_x86_ops->update_cr8_intercept(vcpu, tpr, max_irr);
}
-static void inject_irq(struct kvm_vcpu *vcpu)
+static void inject_pending_irq(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
+ if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP)
+ kvm_x86_ops->set_interrupt_shadow(vcpu, 0);
+
/* try to reinject previous events if any */
if (vcpu->arch.nmi_injected) {
kvm_x86_ops->set_nmi(vcpu);
@@ -3181,26 +3184,11 @@ static void inject_irq(struct kvm_vcpu *vcpu)
}
}
-static void inject_pending_irq(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
-{
- bool req_int_win = !irqchip_in_kernel(vcpu->kvm) &&
- kvm_run->request_interrupt_window;
-
- if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP)
- kvm_x86_ops->set_interrupt_shadow(vcpu, 0);
-
- inject_irq(vcpu);
-
- /* enable NMI/IRQ window open exits if needed */
- if (vcpu->arch.nmi_pending)
- kvm_x86_ops->enable_nmi_window(vcpu);
- else if (kvm_cpu_has_interrupt(vcpu) || req_int_win)
- kvm_x86_ops->enable_irq_window(vcpu);
-}
-
static int vcpu_enter_guest(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
int r;
+ bool req_int_win = !irqchip_in_kernel(vcpu->kvm) &&
+ kvm_run->request_interrupt_window;
if (vcpu->requests)
if (test_and_clear_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests))
@@ -3254,6 +3242,12 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
else
inject_pending_irq(vcpu, kvm_run);
+ /* enable NMI/IRQ window open exits if needed */
+ if (vcpu->arch.nmi_pending)
+ kvm_x86_ops->enable_nmi_window(vcpu);
+ else if (kvm_cpu_has_interrupt(vcpu) || req_int_win)
+ kvm_x86_ops->enable_irq_window(vcpu);
+
if (kvm_lapic_enabled(vcpu)) {
if (!vcpu->arch.apic->vapic_addr)
update_cr8_intercept(vcpu);
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