KVM: Interrupt mask notifiers for ioapic

[linux-2.6-omap-h63xx.git] / virt / kvm / irq_comm.c

diff --git a/virt/kvm/irq_comm.c b/virt/kvm/irq_comm.c
index 55ad76ee2d0913dbb52fcfa220687c33a3c535ef..5162a411e4d2f4193916f9e022a018b1f0ce8a42 100644 (file)
--- a/virt/kvm/irq_comm.c
+++ b/virt/kvm/irq_comm.c
@@ -61,10 +61,9 @@ void kvm_register_irq_ack_notifier(struct kvm *kvm,
        hlist_add_head(&kian->link, &kvm->arch.irq_ack_notifier_list);
 }
 
-void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
-                                    struct kvm_irq_ack_notifier *kian)
+void kvm_unregister_irq_ack_notifier(struct kvm_irq_ack_notifier *kian)
 {
-       hlist_del(&kian->link);
+       hlist_del_init(&kian->link);
 }
 
 /* The caller must hold kvm->lock mutex */
@@ -73,11 +72,15 @@ int kvm_request_irq_source_id(struct kvm *kvm)
        unsigned long *bitmap = &kvm->arch.irq_sources_bitmap;
        int irq_source_id = find_first_zero_bit(bitmap,
                                sizeof(kvm->arch.irq_sources_bitmap));
+
        if (irq_source_id >= sizeof(kvm->arch.irq_sources_bitmap)) {
                printk(KERN_WARNING "kvm: exhaust allocatable IRQ sources!\n");
-               irq_source_id = -EFAULT;
-       } else
-               set_bit(irq_source_id, bitmap);
+               return -EFAULT;
+       }
+
+       ASSERT(irq_source_id != KVM_USERSPACE_IRQ_SOURCE_ID);
+       set_bit(irq_source_id, bitmap);
+
        return irq_source_id;
 }
 
@@ -85,7 +88,9 @@ void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id)
 {
        int i;
 
-       if (irq_source_id <= 0 ||
+       ASSERT(irq_source_id != KVM_USERSPACE_IRQ_SOURCE_ID);
+
+       if (irq_source_id < 0 ||
            irq_source_id >= sizeof(kvm->arch.irq_sources_bitmap)) {
                printk(KERN_ERR "kvm: IRQ source ID out of range!\n");
                return;
@@ -94,3 +99,27 @@ void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id)
                clear_bit(irq_source_id, &kvm->arch.irq_states[i]);
        clear_bit(irq_source_id, &kvm->arch.irq_sources_bitmap);
 }
+
+void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
+                                   struct kvm_irq_mask_notifier *kimn)
+{
+       kimn->irq = irq;
+       hlist_add_head(&kimn->link, &kvm->mask_notifier_list);
+}
+
+void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
+                                     struct kvm_irq_mask_notifier *kimn)
+{
+       hlist_del(&kimn->link);
+}
+
+void kvm_fire_mask_notifiers(struct kvm *kvm, int irq, bool mask)
+{
+       struct kvm_irq_mask_notifier *kimn;
+       struct hlist_node *n;
+
+       hlist_for_each_entry(kimn, n, &kvm->mask_notifier_list, link)
+               if (kimn->irq == irq)
+                       kimn->func(kimn, mask);
+}
+