[PATCH v20 17/21] tests/avocado: s390x cpu topology test dedicated CPU

[Pierre Morel]

A dedicated CPU in vertical polarization can only have
a high entitlement.
Let's check this.

Signed-off-by: Pierre Morel <pmorel@linux.ibm.com>
---
 tests/avocado/s390_topology.py | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/tests/avocado/s390_topology.py b/tests/avocado/s390_topology.py
index 64e1cc9209..59ec253f34 100644
--- a/tests/avocado/s390_topology.py
+++ b/tests/avocado/s390_topology.py
@@ -300,3 +300,37 @@ def test_entitlement(self):
         self.check_topology(1, 0, 0, 0, 'medium', False)
         self.check_topology(2, 1, 0, 0, 'high', False)
         self.check_topology(3, 1, 0, 0, 'high', False)
+
+    def test_dedicated(self):
+        """
+        This test verifies that QEMU modifies the entitlement change correctly
+        for a dedicated CPU after several guest polarization change requests.
+
+        :avocado: tags=arch:s390x
+        :avocado: tags=machine:s390-ccw-virtio
+        """
+        self.kernel_init()
+        self.vm.launch()
+        self.wait_for_console_pattern('no job control')
+
+        self.system_init()
+
+        res = self.vm.qmp('set-cpu-topology',
+                          {'core-id': 0, 'dedicated': True})
+        self.assertEqual(res['return'], {})
+
+        self.check_topology(0, 0, 0, 0, 'high', True)
+
+        exec_command(self, 'echo 1 > /sys/devices/system/cpu/dispatching')
+        time.sleep(0.2)
+        exec_command_and_wait_for_pattern(self,
+                '/bin/cat /sys/devices/system/cpu/dispatching', '1')
+
+        self.check_topology(0, 0, 0, 0, 'high', True)
+
+        exec_command(self, 'echo 0 > /sys/devices/system/cpu/dispatching')
+        time.sleep(0.2)
+        exec_command_and_wait_for_pattern(self,
+                '/bin/cat /sys/devices/system/cpu/dispatching', '0')
+
+        self.check_topology(0, 0, 0, 0, 'high', True)
-- 
2.31.1