KVM: Remove ability to assign a device without iommu support
[linux-2.6.git] / virt / kvm / assigned-dev.c
index 4e9eaeb..2269d71 100644 (file)
@@ -481,6 +481,9 @@ static int kvm_vm_ioctl_assign_device(struct kvm *kvm,
        struct kvm_assigned_dev_kernel *match;
        struct pci_dev *dev;
 
+       if (!(assigned_dev->flags & KVM_DEV_ASSIGN_ENABLE_IOMMU))
+               return -EINVAL;
+
        mutex_lock(&kvm->lock);
        idx = srcu_read_lock(&kvm->srcu);
 
@@ -538,16 +541,14 @@ static int kvm_vm_ioctl_assign_device(struct kvm *kvm,
 
        list_add(&match->list, &kvm->arch.assigned_dev_head);
 
-       if (assigned_dev->flags & KVM_DEV_ASSIGN_ENABLE_IOMMU) {
-               if (!kvm->arch.iommu_domain) {
-                       r = kvm_iommu_map_guest(kvm);
-                       if (r)
-                               goto out_list_del;
-               }
-               r = kvm_assign_device(kvm, match);
+       if (!kvm->arch.iommu_domain) {
+               r = kvm_iommu_map_guest(kvm);
                if (r)
                        goto out_list_del;
        }
+       r = kvm_assign_device(kvm, match);
+       if (r)
+               goto out_list_del;
 
 out:
        srcu_read_unlock(&kvm->srcu, idx);
@@ -587,8 +588,7 @@ static int kvm_vm_ioctl_deassign_device(struct kvm *kvm,
                goto out;
        }
 
-       if (match->flags & KVM_DEV_ASSIGN_ENABLE_IOMMU)
-               kvm_deassign_device(kvm, match);
+       kvm_deassign_device(kvm, match);
 
        kvm_free_assigned_device(kvm, match);