KVM: Userspace controlled irq routing

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

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 786a3ae373b052ec8ea60cf3626ffd5ffc36857b..c65484b471c6de9eae387d2f5341c0950d57ae64 100644 (file)
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -843,6 +843,7 @@ static struct kvm *kvm_create_vm(void)
        if (IS_ERR(kvm))
                goto out;
 #ifdef CONFIG_HAVE_KVM_IRQCHIP
+       INIT_LIST_HEAD(&kvm->irq_routing);
        INIT_HLIST_HEAD(&kvm->mask_notifier_list);
 #endif
 
@@ -926,6 +927,7 @@ static void kvm_destroy_vm(struct kvm *kvm)
        spin_lock(&kvm_lock);
        list_del(&kvm->vm_list);
        spin_unlock(&kvm_lock);
+       kvm_free_irq_routing(kvm);
        kvm_io_bus_destroy(&kvm->pio_bus);
        kvm_io_bus_destroy(&kvm->mmio_bus);
 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
@@ -1945,6 +1947,36 @@ static long kvm_vm_ioctl(struct file *filp,
                        goto out;
                break;
        }
+#endif
+#ifdef KVM_CAP_IRQ_ROUTING
+       case KVM_SET_GSI_ROUTING: {
+               struct kvm_irq_routing routing;
+               struct kvm_irq_routing __user *urouting;
+               struct kvm_irq_routing_entry *entries;
+
+               r = -EFAULT;
+               if (copy_from_user(&routing, argp, sizeof(routing)))
+                       goto out;
+               r = -EINVAL;
+               if (routing.nr >= KVM_MAX_IRQ_ROUTES)
+                       goto out;
+               if (routing.flags)
+                       goto out;
+               r = -ENOMEM;
+               entries = vmalloc(routing.nr * sizeof(*entries));
+               if (!entries)
+                       goto out;
+               r = -EFAULT;
+               urouting = argp;
+               if (copy_from_user(entries, urouting->entries,
+                                  routing.nr * sizeof(*entries)))
+                       goto out_free_irq_routing;
+               r = kvm_set_irq_routing(kvm, entries, routing.nr,
+                                       routing.flags);
+       out_free_irq_routing:
+               vfree(entries);
+               break;
+       }
 #endif
        default:
                r = kvm_arch_vm_ioctl(filp, ioctl, arg);
@@ -2012,6 +2044,10 @@ static long kvm_dev_ioctl_check_extension_generic(long arg)
        case KVM_CAP_USER_MEMORY:
        case KVM_CAP_DESTROY_MEMORY_REGION_WORKS:
                return 1;
+#ifdef CONFIG_HAVE_KVM_IRQCHIP
+       case KVM_CAP_IRQ_ROUTING:
+               return 1;
+#endif
        default:
                break;
        }