Merge pull request #2242 from PaulYuuu/ppc_cpu_mmu

ppc_check_cpu_and_mmu: New case to check CPU and MMU of host and guest

qemu/tests/cfg/ppc_check_cpu_and_mmu.cfg

+- ppc_check_cpu_and_mmu:
+    type = ppc_check_cpu_and_mmu
+    only ppc64le
+    # Older kernel versions do not support get MMU mode from cpuinfo
+    no RHEL.6, RHEL.7
+    no Host_RHEL.7
+    auto_cpu_model = no
+    cpu_model = host
+    kill_vm_on_error = yes
+    kernel_extra_params_remove = disable_radix

qemu/tests/ppc_check_cpu_and_mmu.py

+import re
+import logging
+
+from avocado.utils import process
+from virttest import error_context
+
+
+@error_context.context_aware
+def run(test, params, env):
+    """
+    Check the CPU model and MMU mode of host and guest are matched.
+
+    1) Launch a guest.
+    2) Get CPU information both of host and guest.
+    3) Assert that CPU model and MMU node are matched.
+
+    :param test: the test object.
+    :param params: the test params.
+    :param env: test environment.
+    """
+    def get_cpu_mmu(session=None):
+        cmd_func = session.cmd if session else process.getoutput
+        cpu_info = cmd_func("tail -n 11 /proc/cpuinfo")
+        cpu_info = re.findall(r"(?:cpu\s+:\s+(\w+\d+)).*(?:MMU\s+:\s+(\w+))",
+                              cpu_info, re.S)
+        if cpu_info:
+            return cpu_info[0]
+        test.error("Unable to get the CPU information of this system.")
+
+    vm = env.get_vm(params["main_vm"])
+    vm.verify_alive()
+    guest_session = vm.wait_for_login()
+
+    error_context.base_context("Get CPU information of host and guest.",
+                               logging.info)
+    host_cpu_model, host_mmu_mode = get_cpu_mmu()
+    guest_cpu_model, guest_mmu_mode = get_cpu_mmu(guest_session)
+
+    error_context.context("Assert CPU model and MMU mode of host and guest.",
+                          logging.info)
+    assert (guest_cpu_model == host_cpu_model), ("The CPU model of the host "
+                                                 "and guest do not match")
+    assert (guest_mmu_mode == host_mmu_mode), ("The MMU mode of the host and "
+                                               "guest do not match")
+    logging.info("CPU model and MMU mode of host and guest are matched.")