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KVM: Report IRQ injection status for MSI delivered interrupts

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Return number of CPUs interrupt was successfully injected into or -1 if
none.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Gleb Natapov 2009-02-23 12:57:11 +02:00 committed by Avi Kivity
parent c5bc224240
commit 71450f7885
1 changed files with 8 additions and 5 deletions
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13
virt/kvm/irq_comm.c
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@ -48,7 +48,7 @@ static int kvm_set_ioapic_irq(struct kvm_kernel_irq_routing_entry *e,
static int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e,
struct kvm *kvm, int level)
{
int vcpu_id;
int vcpu_id, r = -1;
struct kvm_vcpu *vcpu;
struct kvm_ioapic *ioapic = ioapic_irqchip(kvm);
int dest_id = (e->msi.address_lo & MSI_ADDR_DEST_ID_MASK)
@ -73,7 +73,7 @@ static int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e,
vcpu = kvm_get_lowest_prio_vcpu(ioapic->kvm, vector,
deliver_bitmask);
if (vcpu != NULL)
kvm_apic_set_irq(vcpu, vector, trig_mode);
r = kvm_apic_set_irq(vcpu, vector, trig_mode);
else
printk(KERN_INFO "kvm: null lowest priority vcpu!\n");
break;
@ -83,14 +83,17 @@ static int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e,
continue;
deliver_bitmask &= ~(1 << vcpu_id);
vcpu = ioapic->kvm->vcpus[vcpu_id];
if (vcpu)
kvm_apic_set_irq(vcpu, vector, trig_mode);
if (vcpu) {
if (r < 0)
r = 0;
r += kvm_apic_set_irq(vcpu, vector, trig_mode);
}
}
break;
default:
break;
}
return 1;
return r;
}
/* This should be called with the kvm->lock mutex held