diff --git a/os_traits/compute/viommu.py b/os_traits/compute/viommu.py
new file mode 100644
index 0000000..60ee5e3
--- /dev/null
+++ b/os_traits/compute/viommu.py
@@ -0,0 +1,25 @@
+# -*- coding: utf-8 -*-
+
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+TRAITS = [
+
+    # traits corresponding to the allowed values of "hw_iommu_model"
+    # image metadata property
+    # Please check VIOMMUModel under /nova/objects/fields.py
+    # we do not include None as by default no iommu will be provided
+    'MODEL_INTEL',
+    'MODEL_SMMUV3',
+    'MODEL_VIRTIO',
+    'MODEL_AUTO',
+]