cpu_topology_test: Add test case to test cpu topology

Signed-off-by: Qianqian Zhu <qizhu@redhat.com>

qemu/tests/cfg/cpu_topology_test.cfg

@@ -0,0 +1,9 @@
+- cpu_topology_test:
+    no smp2
+    no WinXP WinVista Win7 Win8 Win8.1 Win2000 Win2003
+    no Win2008 Win2008..r2 Win2012 Win2012..r2
+    type = cpu_topology_test
+    start_vm = no
+    Linux:
+        x86_64:
+            check_siblings_cmd = 'cat /proc/cpuinfo |grep siblings |uniq |cut -d ":" -f 2'

qemu/tests/cpu_topology_test.py

@@ -0,0 +1,59 @@
+import random
+
+from avocado.utils import cpu
+
+from virttest import error_context
+from virttest import env_process
+
+from provider.cpu_utils import check_guest_cpu_topology
+
+
+@error_context.context_aware
+def run(test, params, env):
+    """
+    Check guest gets correct vcpu num, cpu cores, processors, sockets, siblings
+
+    1) Boot guest with options: -smp n,cores=x,threads=y,sockets=z...
+    2) Check cpu topology
+
+    :param test: QEMU test object.
+    :param params: Dictionary with test parameters.
+    :param env: Dictionary with the test environment.
+    """
+
+    def check(p_name, exp, check_cmd):
+        """
+        Check the cpu property inside guest
+        :param p_name: Property name
+        :param exp: The expect value
+        :param check_cmd: The param to get check command
+        """
+        res = session.cmd_output(params[check_cmd]).strip()
+        if int(res) != int(exp):
+            test.fail('The vcpu %s number inside guest is %s,'
+                      ' while it is set to %s' % (p_name, res, exp))
+
+    vm_name = params['main_vm']
+    os_type = params['os_type']
+    vcpu_threads_list = [1, 2]
+    if params['machine_type'] == 'pseries':
+        vcpu_threads_list = [1, 2, 4, 8]
+    params['vcpu_cores'] = vcpu_cores = random.randint(1, 10)
+    host_cpu = cpu.online_count()
+    for vcpu_threads in vcpu_threads_list:
+        vcpu_sockets = min(max(int(host_cpu) * 5 // (vcpu_cores * vcpu_threads), 1),
+                           random.randint(1, 10))
+        vcpu_sockets = 2 if (os_type == 'Windows' and
+                             vcpu_sockets > 2) else vcpu_sockets
+        params['vcpu_sockets'] = vcpu_sockets
+        params['vcpu_threads'] = vcpu_threads
+        params['smp'] = params['vcpu_maxcpus'] = (vcpu_cores *
+                                                  vcpu_threads * vcpu_sockets)
+        params['start_vm'] = 'yes'
+        env_process.preprocess_vm(test, params, env, vm_name)
+        vm = env.get_vm(vm_name)
+        session = vm.wait_for_login()
+        check_guest_cpu_topology(session, os_type, vm.cpuinfo)
+        if params.get('check_siblings_cmd'):
+            check('sibling', vcpu_threads * vcpu_cores, 'check_siblings_cmd')
+        vm.destroy()