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KVM: In-kernel I/O APIC model

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This allows in-kernel host-side device drivers to raise guest interrupts
without going to userspace.

[avi: fix level-triggered interrupt redelivery on eoi]
[avi: add missing #include]
[avi: avoid redelivery of edge-triggered interrupt]
[avi: implement polarity]
[avi: don't deliver edge-triggered interrupts when unmasking]
[avi: fix host oops on invalid guest access]

Signed-off-by: Yaozu (Eddie) Dong <eddie.dong@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Eddie Dong
2007-07-18 12:03:39 +03:00
committed by Avi Kivity
parent 97222cc831
commit 1fd4f2a5ed
6 changed files with 458 additions and 8 deletions
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15
drivers/kvm/kvm_main.c
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@@ -381,6 +381,7 @@ static void kvm_destroy_vm(struct kvm *kvm)
kvm_io_bus_destroy(&kvm->pio_bus);
kvm_io_bus_destroy(&kvm->mmio_bus);
kfree(kvm->vpic);
kfree(kvm->vioapic);
kvm_free_vcpus(kvm);
kvm_free_physmem(kvm);
kfree(kvm);
@@ -2771,8 +2772,14 @@ static long kvm_vm_ioctl(struct file *filp,
case KVM_CREATE_IRQCHIP:
r = -ENOMEM;
kvm->vpic = kvm_create_pic(kvm);
if (kvm->vpic)
r = 0;
if (kvm->vpic) {
r = kvm_ioapic_init(kvm);
if (r) {
kfree(kvm->vpic);
kvm->vpic = NULL;
goto out;
}
}
else
goto out;
break;
@@ -2787,7 +2794,9 @@ static long kvm_vm_ioctl(struct file *filp,
kvm_pic_set_irq(pic_irqchip(kvm),
irq_event.irq,
irq_event.level);
/* TODO: IOAPIC */
kvm_ioapic_set_irq(kvm->vioapic,
irq_event.irq,
irq_event.level);
r = 0;
}
break;