Add CPU Mode Metadata Def

Creates Metadata def for CPU Mode. The allowed
modes are "none", "host-passthrough", "custom"
and "host-model".

Change-Id: Id7a01546334ddea952708143c5dfc7861353f2fc
Closes-Bug: 1636243

etc/metadefs/compute-cpu-mode.json

@@ -0,0 +1,29 @@
+{
+    "namespace": "OS::Compute::CPUMode",
+    "display_name": "CPU Mode",
+    "description": "This provides the preferred CPU Model to be used when booting up a guest VM.",
+    "visibility": "public",
+    "resource_type_associations": [
+        {
+            "name": "OS::Glance::Image",
+            "prefix": "hw_"
+        },
+        {
+            "name": "OS::Nova::Flavor",
+            "prefix": "hw:"
+        }
+    ],
+    "properties": {
+        "cpu_mode": {
+            "title": "CPU Mode",
+            "description": "Type of CPU Mode.",
+            "type": "string",
+            "enum": [
+              "none",
+              "host-model",
+              "host-passthrough",
+              "custom"
+            ]
+        }
+    }
+}

etc/metadefs/glance-common-image-props.json

@@ -33,6 +33,11 @@
             "description": "The common name of the operating system distribution in lowercase (uses the same data vocabulary as the libosinfo project). Specify only a recognized value for this field. Deprecated values are listed to assist you in searching for the recognized value.",
             "type": "string"
         },
+        "hw_cpu_mode": {
+            "title": "CPU Mode",
+            "description": "This specifies the CPU Mode for the guest vm",
+            "type": "string"
+        },
         "os_version": {
             "title": "OS Version",
             "description": "Operating system version as specified by the distributor. (for example, '11.10')",