[PATCH v24 17/21] tests/avocado: s390x cpu topology entitlement tests

[Nina Schoetterl-Glausch <nsg@linux.ibm.com>]

From: Pierre Morel <pmorel@linux.ibm.com>

Test changes in the entitlement from both a guest and a host point of
view, depending on the polarization.

Signed-off-by: Pierre Morel <pmorel@linux.ibm.com>
Reviewed-by: Nina Schoetterl-Glausch <nsg@linux.ibm.com>
Co-developed-by: Nina Schoetterl-Glausch <nsg@linux.ibm.com>
Signed-off-by: Nina Schoetterl-Glausch <nsg@linux.ibm.com>
---
 tests/avocado/s390_topology.py | 62 ++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)

diff --git a/tests/avocado/s390_topology.py b/tests/avocado/s390_topology.py
index 8166cee134..24fac9a54d 100644
--- a/tests/avocado/s390_topology.py
+++ b/tests/avocado/s390_topology.py
@@ -243,3 +243,65 @@ def test_polarization(self):
         res = self.vm.qmp('query-s390x-cpu-polarization')
         self.assertEqual(res['return']['polarization'], 'horizontal')
         self.check_topology(0, 0, 0, 0, 'medium', False)
+
+
+    def check_polarization(self, polarization):
+        #We need to wait for the change to have been propagated to the kernel
+        exec_command_and_wait_for_pattern(self,
+            "\n".join([
+                "timeout 1 sh -c 'while true",
+                'do',
+                '    syspath="/sys/devices/system/cpu/cpu0/polarization"',
+                '    polarization="$(cat "$syspath")" || exit',
+               f'    if [ "$polarization" = "{polarization}" ]; then',
+                '        exit 0',
+                '    fi',
+                '    sleep 0.01',
+                #searched for strings mustn't show up in command, '' to obfuscate
+                "done' && echo succ''ess || echo fail''ure",
+            ]),
+            "success", "failure")
+
+
+    def test_entitlement(self):
+        """
+        This test verifies that QEMU modifies the entitlement
+        after a guest request and that the guest sees the change.
+
+        :avocado: tags=arch:s390x
+        :avocado: tags=machine:s390-ccw-virtio
+        """
+        self.kernel_init()
+        self.vm.launch()
+        self.wait_until_booted()
+
+        self.system_init()
+
+        self.check_polarization('horizontal')
+        self.check_topology(0, 0, 0, 0, 'medium', False)
+
+        self.guest_set_dispatching('1')
+        self.check_polarization('vertical:medium')
+        self.check_topology(0, 0, 0, 0, 'medium', False)
+
+        res = self.vm.qmp('set-cpu-topology',
+                          {'core-id': 0, 'entitlement': 'low'})
+        self.assertEqual(res['return'], {})
+        self.check_polarization('vertical:low')
+        self.check_topology(0, 0, 0, 0, 'low', False)
+
+        res = self.vm.qmp('set-cpu-topology',
+                          {'core-id': 0, 'entitlement': 'medium'})
+        self.assertEqual(res['return'], {})
+        self.check_polarization('vertical:medium')
+        self.check_topology(0, 0, 0, 0, 'medium', False)
+
+        res = self.vm.qmp('set-cpu-topology',
+                          {'core-id': 0, 'entitlement': 'high'})
+        self.assertEqual(res['return'], {})
+        self.check_polarization('vertical:high')
+        self.check_topology(0, 0, 0, 0, 'high', False)
+
+        self.guest_set_dispatching('0');
+        self.check_polarization("horizontal")
+        self.check_topology(0, 0, 0, 0, 'high', False)
-- 
2.39.2