vmm: Add a vDPA device parameter

Introduce a new --vdpa parameter associated with a VdpaConfig for the
future creation of a Vdpa device.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>

vmm/src/api/openapi/cloud-hypervisor.yaml

@@ -505,6 +505,10 @@ components:
           type: array
           items:
             $ref: '#/components/schemas/DeviceConfig'
+        vdpa:
+          type: array
+          items:
+            $ref: '#/components/schemas/VdpaConfig'
         vsock:
             $ref: '#/components/schemas/VsockConfig'
         sgx_epc:
@@ -921,6 +925,23 @@ components:
         id:
           type: string
 
+    VdpaConfig:
+      required:
+      - path
+      - num_queues
+      type: object
+      properties:
+        path:
+          type: string
+        num_queues:
+          type: integer
+          default: 1
+        pci_segment:
+          type: integer
+          format: int16
+        id:
+          type: string
+
     VsockConfig:
       required:
       - cid