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KVM: Add an arch specific hooks in 'struct kvm_kernel_irqfd'

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This patch adds an arch specific hooks 'arch_update' in
'struct kvm_kernel_irqfd'. On Intel side, it is used to
update the IRTE when VT-d posted-interrupts is used.

Signed-off-by: Feng Wu <feng.wu@intel.com>
Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Feng Wu 2015-09-18 22:29:53 +08:00 committed by Paolo Bonzini
parent 9016cfb577
commit f70c20aaf1
2 changed files with 20 additions and 1 deletions
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2
include/linux/kvm_host.h
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@ -1172,5 +1172,7 @@ void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *,
struct irq_bypass_producer *);
void kvm_arch_irq_bypass_stop(struct irq_bypass_consumer *);
void kvm_arch_irq_bypass_start(struct irq_bypass_consumer *);
int kvm_arch_update_irqfd_routing(struct kvm *kvm, unsigned int host_irq,
uint32_t guest_irq, bool set);
#endif /* CONFIG_HAVE_KVM_IRQ_BYPASS */
#endif

19
virt/kvm/eventfd.c
View File

@ -266,6 +266,13 @@ void __attribute__((weak)) kvm_arch_irq_bypass_start(
struct irq_bypass_consumer *cons)
{
}
int __attribute__((weak)) kvm_arch_update_irqfd_routing(
struct kvm *kvm, unsigned int host_irq,
uint32_t guest_irq, bool set)
{
return 0;
}
#endif
static int
@ -586,9 +593,19 @@ void kvm_irq_routing_update(struct kvm *kvm)
spin_lock_irq(&kvm->irqfds.lock);
list_for_each_entry(irqfd, &kvm->irqfds.items, list)
list_for_each_entry(irqfd, &kvm->irqfds.items, list) {
irqfd_update(kvm, irqfd);
#ifdef CONFIG_HAVE_KVM_IRQ_BYPASS
if (irqfd->producer) {
int ret = kvm_arch_update_irqfd_routing(
irqfd->kvm, irqfd->producer->irq,
irqfd->gsi, 1);
WARN_ON(ret);
}
#endif
}
spin_unlock_irq(&kvm->irqfds.lock);
}