[PULL 10/10] tests/functional: Add a OS level migration test for pseries

[Harsh Prateek Bora <harshpb@linux.ibm.com>]

From: Fabiano Rosas <farosas@suse.de>

There's currently no OS level test for ppc64le. Add one such test by
reusing the boot level tests that are already present.

The test boots the source machine, waits for it to reach a mid-boot
message, migrates and checks that the destination has reached the
final boot message (VFS error due to no disk).

Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
Link: https://lore.kernel.org/qemu-devel/20260109123519.28703-3-farosas@suse.de
Signed-off-by: Harsh Prateek Bora <harshpb@linux.ibm.com>
---
 tests/functional/ppc64/test_migration.py | 12 ++++++++
 tests/functional/ppc64/test_pseries.py   | 35 ++++++++++++++++++++++++
 2 files changed, 47 insertions(+)

diff --git a/tests/functional/ppc64/test_migration.py b/tests/functional/ppc64/test_migration.py
index 5dfdaaf709..a3b819680b 100755
--- a/tests/functional/ppc64/test_migration.py
+++ b/tests/functional/ppc64/test_migration.py
@@ -4,6 +4,7 @@
 #
 # ppc migration test
 
+from qemu_test.ports import Ports
 from migration import MigrationTest
 
 
@@ -21,6 +22,17 @@ def test_migration_with_exec(self):
         self.set_machine('mac99')
         self.migration_with_exec()
 
+    def do_migrate_ppc64_linux(self, source_vm, dest_vm):
+        with Ports() as ports:
+            port = ports.find_free_port()
+            if port is None:
+                self.skipTest('Failed to find a free port')
+            uri = 'tcp:localhost:%u' % port
+
+            dest_vm.qmp('migrate-incoming', uri=uri)
+            source_vm.qmp('migrate', uri=uri)
+            self.assert_migration(source_vm, dest_vm)
+
 
 if __name__ == '__main__':
     MigrationTest.main()
diff --git a/tests/functional/ppc64/test_pseries.py b/tests/functional/ppc64/test_pseries.py
index 7840c4e3ff..b45763c305 100755
--- a/tests/functional/ppc64/test_pseries.py
+++ b/tests/functional/ppc64/test_pseries.py
@@ -9,6 +9,7 @@
 
 from qemu_test import QemuSystemTest, Asset
 from qemu_test import wait_for_console_pattern
+from test_migration import PpcMigrationTest
 
 class PseriesMachine(QemuSystemTest):
 
@@ -87,5 +88,39 @@ def test_ppc64_linux_big_boot(self):
         wait_for_console_pattern(self, console_pattern, self.panic_message)
         wait_for_console_pattern(self, self.good_message, self.panic_message)
 
+    def test_ppc64_linux_migration(self):
+        self.set_machine('pseries')
+
+        kernel_path = self.ASSET_KERNEL.fetch()
+        kernel_command_line = self.KERNEL_COMMON_COMMAND_LINE
+
+        dest_vm = self.get_vm(name="dest-qemu")
+        dest_vm.add_args('-incoming', 'defer')
+        dest_vm.add_args('-smp', '4')
+        dest_vm.add_args('-nodefaults')
+        dest_vm.add_args('-kernel', kernel_path,
+                         '-append', kernel_command_line)
+        dest_vm.set_console()
+        dest_vm.launch()
+
+        source_vm = self.get_vm(name="source-qemu")
+        source_vm.add_args('-smp', '4')
+        source_vm.add_args('-nodefaults')
+        source_vm.add_args('-kernel', kernel_path,
+                           '-append', kernel_command_line)
+        source_vm.set_console()
+        source_vm.launch()
+
+        # ensure the boot has reached Linux
+        console_pattern = 'smp: Brought up 1 node, 4 CPUs'
+        wait_for_console_pattern(self, console_pattern, self.panic_message,
+                                 vm=source_vm)
+
+        PpcMigrationTest().do_migrate_ppc64_linux(source_vm, dest_vm);
+
+        # ensure the boot proceeds after migration
+        wait_for_console_pattern(self, self.good_message, self.panic_message,
+                                 vm=dest_vm)
+
 if __name__ == '__main__':
     QemuSystemTest.main()
-- 
2.52.0