[feature/virtio-mem] Add dummy implementation for virtio-mem

tests/framework/http_api.py

@@ -133,3 +133,4 @@ def __init__(self, api_usocket_full_name, *, on_error=None):
         self.cpu_config = Resource(self, "/cpu-config")
         self.entropy = Resource(self, "/entropy")
         self.serial = Resource(self, "/serial")
+        self.memory_hotplug = Resource(self, "/hotplug/memory")

tests/integration_tests/functional/test_api.py

@@ -981,6 +981,31 @@ def test_api_entropy(uvm_plain):
         test_microvm.api.entropy.put()
 
 
+def test_api_memory_hotplug(uvm_plain):
+    """
+    Test hotplug related API commands.
+    """
+    test_microvm = uvm_plain
+    test_microvm.spawn()
+    test_microvm.basic_config()
+
+    # Adding hotplug memory region should be OK.
+    test_microvm.api.memory_hotplug.put(
+        total_size_mib=1024, block_size_mib=128, slot_size_mib=1024
+    )
+
+    # Overwriting an existing should be OK.
+    # Omitting optional values should be ok
+    test_microvm.api.memory_hotplug.put(total_size_mib=1024)
+
+    # Start the microvm
+    test_microvm.start()
+
+    # API should be rejected after boot
+    with pytest.raises(RuntimeError):
+        test_microvm.api.memory_hotplug.put(total_size_mib=1024)
+
+
 def test_api_balloon(uvm_nano):
     """
     Test balloon related API commands.
@@ -1211,8 +1236,13 @@ def test_get_full_config(uvm_plain):
     response = test_microvm.api.vsock.put(guest_cid=15, uds_path="vsock.sock")
     expected_cfg["vsock"] = {"guest_cid": 15, "uds_path": "vsock.sock"}
 
-    # TODO Add hot-pluggable memory.
-    expected_cfg["memory-hotplug"] = None
+    # Add hot-pluggable memory.
+    expected_cfg["memory-hotplug"] = {
+        "total_size_mib": 1024,
+        "block_size_mib": 128,
+        "slot_size_mib": 1024,
+    }
+    test_microvm.api.memory_hotplug.put(**expected_cfg["memory-hotplug"])
 
     # Add a net device.
     iface_id = "1"