deferred interrupts should be the highest priority in the system
Signed-off-by: Gregory Haskins <[EMAIL PROTECTED]>
---
drivers/kvm/kvm.h | 24 +++++-------------------
drivers/kvm/svm.c | 19 +++++++++++++++----
drivers/kvm/vmx.c | 19 +++++++++++++++----
3 files changed, 35 insertions(+), 27 deletions(-)
diff --git a/drivers/kvm/kvm.h b/drivers/kvm/kvm.h
index 62c4c4d..59e6c74 100644
--- a/drivers/kvm/kvm.h
+++ b/drivers/kvm/kvm.h
@@ -168,6 +168,7 @@ typedef enum {
kvm_cpuirq_extint,
kvm_cpuirq_smi,
kvm_cpuirq_nmi,
+ kvm_cpuirq_deferred,
kvm_cpuirq_invalid, /* must always be last */
} kvm_cpuirq_t;
@@ -473,12 +474,7 @@ struct kvm_vcpu {
*/
static inline int __kvm_vcpu_irq_pending(struct kvm_vcpu *vcpu)
{
- int pending = vcpu->irq.pending;
-
- if (vcpu->irq.deferred != -1)
- __set_bit(kvm_cpuirq_localint, &pending);
-
- return pending;
+ return vcpu->irq.pending;
}
static inline int kvm_vcpu_irq_pending(struct kvm_vcpu *vcpu)
@@ -499,24 +495,13 @@ static inline int kvm_vcpu_irq_pending(struct kvm_vcpu
*vcpu)
static inline int kvm_vcpu_irq_pop(struct kvm_vcpu *vcpu,
struct kvm_irqack_data *data)
{
- int ret = 0;
-
if (vcpu->irq.deferred != -1) {
- ret = kvm_irqdevice_ack(&vcpu->irq.dev, KVM_IRQACK_FLAG_PEEK,
- data);
data->flags |= KVM_IRQACKDATA_VECTOR_VALID;
data->vector = vcpu->irq.deferred;
vcpu->irq.deferred = -1;
- } else
- ret = kvm_irqdevice_ack(&vcpu->irq.dev, 0, data);
+ }
- /*
- * If there are no more interrupts we must clear the status flag
- */
- if (!(data->flags & KVM_IRQACKDATA_VECTOR_PENDING))
- __clear_bit(kvm_cpuirq_localint, &vcpu->irq.pending);
-
- return ret;
+ return 0;
}
static inline void __kvm_vcpu_irq_push(struct kvm_vcpu *vcpu, int irq)
@@ -524,6 +509,7 @@ static inline void __kvm_vcpu_irq_push(struct kvm_vcpu
*vcpu, int irq)
BUG_ON(vcpu->irq.deferred != -1); /* We can only hold one deferred */
vcpu->irq.deferred = irq;
+ __set_bit(kvm_cpuirq_deferred, &vcpu->irq.pending);
}
static inline void kvm_vcpu_irq_push(struct kvm_vcpu *vcpu, int irq)
diff --git a/drivers/kvm/svm.c b/drivers/kvm/svm.c
index 02854f4..2128f38 100644
--- a/drivers/kvm/svm.c
+++ b/drivers/kvm/svm.c
@@ -1399,12 +1399,10 @@ static void do_intr_requests(struct kvm_vcpu *vcpu,
switch (pin) {
case kvm_cpuirq_localint:
- r = kvm_vcpu_irq_pop(vcpu, &ack);
+ r = kvm_irqdevice_ack(&vcpu->irq.dev, 0, &ack);
break;
case kvm_cpuirq_extint:
r = kvm_irqdevice_ack(&vcpu->kvm->isa_irq, 0, &ack);
- if (!(ack.flags & KVM_IRQACKDATA_VECTOR_PENDING))
- __clear_bit(pin, &vcpu->irq.pending);
break;
case kvm_cpuirq_nmi:
/*
@@ -1414,7 +1412,9 @@ static void do_intr_requests(struct kvm_vcpu *vcpu,
*/
ack.flags |= KVM_IRQACKDATA_VECTOR_VALID;
ack.vector = 2;
- __clear_bit(pin, &vcpu->irq.pending);
+ break;
+ case kvm_cpuirq_deferred:
+ r = kvm_vcpu_irq_pop(vcpu, &ack);
break;
default:
panic("KVM: unknown interrupt pin raised: %d\n", pin);
@@ -1423,6 +1423,9 @@ static void do_intr_requests(struct kvm_vcpu *vcpu,
BUG_ON(r < 0);
+ if (!(ack.flags & KVM_IRQACKDATA_VECTOR_PENDING))
+ __clear_bit(pin, &vcpu->irq.pending);
+
if (ack.flags & KVM_IRQACKDATA_VECTOR_VALID) {
control = &vcpu->svm->vmcb->control;
#if 0
@@ -1485,6 +1488,14 @@ static void do_interrupt_requests(struct kvm_vcpu *vcpu,
printk(KERN_WARNING "KVM: dropping unhandled SMI\n");
__clear_bit(pin, &vcpu->irq.pending);
break;
+ case kvm_cpuirq_deferred:
+ do_intr_requests(vcpu, kvm_run, pin);
+ /*
+ * We dont allow any more injections to occur if we
+ * have a deferred interrupt
+ */
+ pending = 0;
+ break;
case kvm_cpuirq_invalid:
/* drop */
break;
diff --git a/drivers/kvm/vmx.c b/drivers/kvm/vmx.c
index 62db2e0..144acf5 100644
--- a/drivers/kvm/vmx.c
+++ b/drivers/kvm/vmx.c
@@ -1511,12 +1511,10 @@ static void do_intr_requests(struct kvm_vcpu *vcpu,
switch (pin) {
case kvm_cpuirq_localint:
- r = kvm_vcpu_irq_pop(vcpu, &ack);
+ r = kvm_irqdevice_ack(&vcpu->irq.dev, 0, &ack);
break;
case kvm_cpuirq_extint:
r = kvm_irqdevice_ack(&vcpu->kvm->isa_irq, 0, &ack);
- if (!(ack.flags & KVM_IRQACKDATA_VECTOR_PENDING))
- __clear_bit(pin, &vcpu->irq.pending);
break;
case kvm_cpuirq_nmi:
/*
@@ -1528,7 +1526,9 @@ static void do_intr_requests(struct kvm_vcpu *vcpu,
*/
ack.flags |= KVM_IRQACKDATA_VECTOR_VALID;
ack.vector = 2;
- __clear_bit(pin, &vcpu->irq.pending);
+ break;
+ case kvm_cpuirq_deferred:
+ r = kvm_vcpu_irq_pop(vcpu, &ack);
break;
default:
panic("KVM: unknown interrupt pin raised: %d\n", pin);
@@ -1537,6 +1537,9 @@ static void do_intr_requests(struct kvm_vcpu *vcpu,
BUG_ON(r < 0);
+ if (!(ack.flags & KVM_IRQACKDATA_VECTOR_PENDING))
+ __clear_bit(pin, &vcpu->irq.pending);
+
if (ack.flags & KVM_IRQACKDATA_VECTOR_VALID) {
if (vcpu->rmode.active)
inject_rmode_irq(vcpu, ack.vector);
@@ -1608,6 +1611,14 @@ static void do_interrupt_requests(struct kvm_vcpu *vcpu,
else
do_intr_requests(vcpu, kvm_run, pin);
break;
+ case kvm_cpuirq_deferred:
+ do_intr_requests(vcpu, kvm_run, pin);
+ /*
+ * We dont allow any more injections to occur if we
+ * have a deferred interrupt
+ */
+ pending = 0;
+ break;
case kvm_cpuirq_invalid:
/* drop */
break;
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