api: Add support for new cyborg extra specs

There's currently only one, as noted at [1].

[1] https://specs.openstack.org/openstack/nova-specs/specs/train/approved/nova-cyborg-interaction.html

Change-Id: Ie70a0aef4f6647510750b7e0bdd2f040331b79e8
Signed-off-by: Stephen Finucane <stephenfin@redhat.com>

nova/api/validation/extra_specs/accel.py

@@ -0,0 +1,36 @@
+# Copyright 2020 Red Hat, Inc. All rights reserved.
+#
+# 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.
+
+"""Validators for ``accel`` namespaced extra specs."""
+
+from nova.api.validation.extra_specs import base
+
+
+EXTRA_SPEC_VALIDATORS = [
+    base.ExtraSpecValidator(
+        name='accel:device_profile',
+        description=(
+            'The name of a device profile to configure for the instance. '
+            'A device profile may be viewed as a "flavor for devices".'
+        ),
+        value={
+            'type': str,
+            'description': 'A name of a device profile.',
+        },
+    ),
+]
+
+
+def register():
+    return EXTRA_SPEC_VALIDATORS

setup.cfg

@@ -47,6 +47,7 @@ oslo.policy.policies =
     # aggregate method.
     nova = nova.policies:list_rules
 nova.api.extra_spec_validators =
+    accel = nova.api.validation.extra_specs.accel
     aggregate_instance_extra_specs = nova.api.validation.extra_specs.aggregate_instance_extra_specs
     capabilities = nova.api.validation.extra_specs.capabilities
     hw = nova.api.validation.extra_specs.hw