test: Add Linux on PVH test

Add a test that verifies that firecracker can boot a PVH-enabled linux,
and assert that it actually used the PVH boot protocol.

Signed-off-by: Patrick Roy <[email protected]>

tests/integration_tests/functional/test_pvh.py

@@ -0,0 +1,45 @@
+# Copyright 2023 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+# SPDX-License-Identifier: Apache-2.0
+
+"""Tests for PVH boot mode"""
+
+# pylint:disable=redefined-outer-name
+
+import pytest
+
+from conftest import guest_kernel_fxt
+from framework import defs
+from framework.properties import global_props
+
+pytestmark = pytest.mark.skipif(
+    global_props.cpu_architecture != "x86_64", reason="x86_64 specific tests"
+)
+
+pvh_kernel_params = [
+    pytest.param(path, id=path.name)
+    for path in defs.ARTIFACT_DIR.rglob("vmlinux-*-pvh")
+]
+pvh_guest_kernel = pytest.fixture(guest_kernel_fxt, params=pvh_kernel_params)
+
+
+@pytest.fixture
+def uvm_pvh(microvm_factory, pvh_guest_kernel, rootfs):
+    """Create a Linux/PVH microvm"""
+    return microvm_factory.build(pvh_guest_kernel, rootfs)
+
+
+def test_linux_pvh_boot(uvm_pvh):
+    """
+    Tests booting a PVH-enabled linux kernel for supported guest kernel version 5.10 and newer (as non-XEN PVH
+    support was added to linux in 5.0).
+
+    Asserts that the 'Kernel loaded using PVH boot protocol' log message is present
+    """
+    uvm_pvh.spawn()
+    uvm_pvh.basic_config()
+    uvm_pvh.add_net_iface()
+    uvm_pvh.start()
+
+    uvm_pvh.ssh.run("true")
+
+    uvm_pvh.check_log_message("Kernel loaded using PVH boot protocol")