diff options
Diffstat (limited to 'virt/kvm/eventfd.c')
| -rw-r--r-- | virt/kvm/eventfd.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c index e996989cd580..2ad013b8bde9 100644 --- a/virt/kvm/eventfd.c +++ b/virt/kvm/eventfd.c @@ -281,6 +281,13 @@ int __attribute__((weak)) kvm_arch_update_irqfd_routing( { return 0; } + +bool __attribute__((weak)) kvm_arch_irqfd_route_changed( + struct kvm_kernel_irq_routing_entry *old, + struct kvm_kernel_irq_routing_entry *new) +{ + return true; +} #endif static int @@ -615,10 +622,16 @@ void kvm_irq_routing_update(struct kvm *kvm) spin_lock_irq(&kvm->irqfds.lock); list_for_each_entry(irqfd, &kvm->irqfds.items, list) { +#ifdef CONFIG_HAVE_KVM_IRQ_BYPASS + /* Under irqfds.lock, so can read irq_entry safely */ + struct kvm_kernel_irq_routing_entry old = irqfd->irq_entry; +#endif + irqfd_update(kvm, irqfd); #ifdef CONFIG_HAVE_KVM_IRQ_BYPASS - if (irqfd->producer) { + if (irqfd->producer && + kvm_arch_irqfd_route_changed(&old, &irqfd->irq_entry)) { int ret = kvm_arch_update_irqfd_routing( irqfd->kvm, irqfd->producer->irq, irqfd->gsi, 1); |