lkml.org 
[lkml]   [2009]   [May]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 41/45] KVM: Always request IRQ/NMI window if an interrupt is pending
Date
From: Gleb Natapov <gleb@redhat.com>

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>
---
arch/x86/kvm/x86.c | 30 ++++++++++++------------------
1 files changed, 12 insertions(+), 18 deletions(-)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index e395ca4..efba9bc 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -3148,8 +3148,11 @@ 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);
@@ -3177,26 +3180,11 @@ 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))
@@ -3250,6 +3238,12 @@ 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);
--
1.6.0.6


\
 
 \ /
  Last update: 2009-05-24 17:55    [W:0.182 / U:0.160 seconds]
©2003-2014 Jasper Spaans. Advertise on this site