KVM: Add TDX module check test case

Signed-off-by: Xudong Hao <[email protected]>

KVM/qemu/tdx_seam_module.cfg

@@ -0,0 +1,20 @@
+- tdx_seam_module:
+    type = tdx_seam_module
+    virt_test_type = qemu
+    vm_accelerator = kvm
+    machine_type_extra_params = "kernel-irqchip=split"
+    vm_secure_guest_type = tdx
+    # Don't create/remove guest images
+    force_create_image = no
+    remove_image = no
+    start_vm = no
+    # Stop VM after testing
+    kill_vm = yes
+    shell_prompt = "^\[.*\][\#\$]\s*$"
+    vga = std
+    auto_cpu_model = "no"
+    cpu_model = host
+    read_cmd = "cat /sys/module/kvm_intel/parameters/%s"
+    rdmsr_cmd = "rdmsr 0xfe --bitfield 15:15"
+    tdx_module_pattern = "tdx: module initialized"
+    tdx_negative_pattern = "No TDX module loaded by BIOS"

KVM/qemu/tests/tdx_seam_module.py

@@ -0,0 +1,43 @@
+#!/usr/bin/python3
+
+# SPDX-License-Identifier: GPL-2.0-only
+# Copyright (c) 2024 Intel Corporation
+
+# Author: Xudong Hao <[email protected]>
+#
+# History:  Dec. 2024 - Xudong Hao - creation
+
+import re
+
+from avocado.utils import process, cpu
+
+
+def run(test, params, env):
+    """
+    TDX module test:
+    1. Check host TDX capability
+    2. Check TDX module load status
+
+    :param test: QEMU test object
+    :param params: Dictionary with the test parameters
+    :param env: Dictionary with test environment.
+    """
+    if cpu.get_cpu_vendor_name() != 'intel':
+        test.cancel("This test is supposed to run on Intel host")
+
+    rdmsr_cmd = params["rdmsr_cmd"]
+    if process.getoutput(rdmsr_cmd) != "1":
+        test.fail("Platform does not support TDX-SEAM")
+
+    read_cmd = params["read_cmd"]
+    tdx_value = process.getoutput(read_cmd % "tdx")
+    if tdx_value != "Y":
+        test.fail("TDX is not supported in KVM")
+
+    module_pattern = params["tdx_module_pattern"]
+    negative_pattern = params["tdx_negative_pattern"]
+    dmesg = process.system_output("dmesg")
+    module_str = re.findall(r'%s' % module_pattern, dmesg.decode('utf-8'))
+    negative_str = re.findall(r'%s' % negative_pattern, dmesg.decode('utf-8'))
+    if negative_str or not module_str:
+        test.fail("TDX module isn't initialized")