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KVM: Maintain back mapping from irqchip/pin to gsi

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Maintain back mapping from irqchip/pin to gsi to speedup
interrupt acknowledgment notifications.

[avi: build fix on non-x86/ia64]

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Gleb Natapov 2009-08-24 11:54:21 +03:00 • committed by Avi Kivity
commit 3e71f88bc9
4 changed files with 25 additions and 17 deletions
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9
include/linux/kvm_host.h
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@ -131,7 +131,10 @@ struct kvm_kernel_irq_routing_entry {
struct hlist_node link;
};
#ifdef __KVM_HAVE_IOAPIC
struct kvm_irq_routing_table {
int chip[KVM_NR_IRQCHIPS][KVM_IOAPIC_NUM_PINS];
struct kvm_kernel_irq_routing_entry *rt_entries;
u32 nr_rt_entries;
/*
@ -141,6 +144,12 @@ struct kvm_irq_routing_table {
struct hlist_head map[0];
};
#else
struct kvm_irq_routing_table {};
#endif
struct kvm {
spinlock_t mmu_lock;
spinlock_t requests_lock;