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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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6
drivers/kvm/kvm.h
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@ -410,6 +410,7 @@ struct kvm {
struct kvm_io_bus mmio_bus;
struct kvm_io_bus pio_bus;
struct kvm_pic *vpic;
struct kvm_ioapic *vioapic;
};
static inline struct kvm_pic *pic_irqchip(struct kvm *kvm)
@ -417,6 +418,11 @@ static inline struct kvm_pic *pic_irqchip(struct kvm *kvm)
return kvm->vpic;
}
static inline struct kvm_ioapic *ioapic_irqchip(struct kvm *kvm)
{
return kvm->vioapic;
}
static inline int irqchip_in_kernel(struct kvm *kvm)
{
return pic_irqchip(kvm) != 0;