/*
* check if there is pending interrupt without
* intack.
*/
int kvm_cpu_has_interrupt(struct kvm_vcpu *v)
{
if (!lapic_in_kernel(v))
return v->arch.interrupt.pending;
if (kvm_cpu_has_extint(v))
return 1;
return kvm_apic_has_interrupt(v) != -1; /* LAPIC */
}
/*
* check if there is injectable interrupt:
* when virtual interrupt delivery enabled,
* interrupt from apic will handled by hardware,
* we don't need to check it here.
*/
int kvm_cpu_has_injectable_intr(struct kvm_vcpu *v)
{
if (!lapic_in_kernel(v))
return v->arch.interrupt.pending;
if (kvm_cpu_has_extint(v))
return 1;
if (kvm_vcpu_apicv_active(v))
return 0;
return kvm_apic_has_interrupt(v) != -1; /* LAPIC */
}
/*
* Read pending interrupt(from non-APIC source)
* vector and intack.
*/
static int kvm_cpu_get_extint(struct kvm_vcpu *v)
{
if (kvm_cpu_has_extint(v)) {
if (irqchip_split(v->kvm)) {
int vector = v->arch.pending_external_vector;
v->arch.pending_external_vector = -1;
return vector;
} else
return kvm_pic_read_irq(v->kvm); /* PIC */
} else
return -1;
}
/*
* check if there is injectable interrupt:
* when virtual interrupt delivery enabled,
* interrupt from apic will handled by hardware,
* we don't need to check it here.
*/
int kvm_cpu_has_injectable_intr(struct kvm_vcpu *v)
{
if (!irqchip_in_kernel(v->kvm))
return v->arch.interrupt.pending;
if (kvm_cpu_has_extint(v))
return 1;
if (kvm_apic_vid_enabled(v->kvm))
return 0;
return kvm_apic_has_interrupt(v) != -1; /* LAPIC */
}
/*
* Read pending interrupt(from non-APIC source)
* vector and intack.
*/
static int kvm_cpu_get_extint(struct kvm_vcpu *v)
{
if (kvm_cpu_has_extint(v))
return kvm_pic_read_irq(v->kvm); /* PIC */
return -1;
}
