Introduction of the s390x cpu topology core functions and
basic tests.
We test the corelation between the command line and
the QMP results in query-cpus-fast for various CPU topology.
Signed-off-by: Pierre Morel <pmorel@xxxxxxxxxxxxx>
---
tests/avocado/s390_topology.py | 196 +++++++++++++++++++++++++++++++++
1 file changed, 196 insertions(+)
create mode 100644 tests/avocado/s390_topology.py
diff --git a/tests/avocado/s390_topology.py b/tests/avocado/s390_topology.py
new file mode 100644
index 0000000000..c908111e94
--- /dev/null
+++ b/tests/avocado/s390_topology.py
@@ -0,0 +1,196 @@
+# Functional test that boots a Linux kernel and checks the console
+#
+# Copyright (c) 2023 IBM Corp.
+#
+# Author:
+# Pierre Morel <pmorel@xxxxxxxxxxxxx>
+#
+# This work is licensed under the terms of the GNU GPL, version 2 or
+# later. See the COPYING file in the top-level directory.
+
+import os
+import shutil
+import time
+
+from avocado import skip
+from avocado import skipUnless
+from avocado import skipIf
+from avocado_qemu import QemuSystemTest
+from avocado_qemu import exec_command
+from avocado_qemu import exec_command_and_wait_for_pattern
+from avocado_qemu import interrupt_interactive_console_until_pattern
+from avocado_qemu import wait_for_console_pattern
+from avocado.utils import process
+from avocado.utils import archive
+
+
+class LinuxKernelTest(QemuSystemTest):
+ KERNEL_COMMON_COMMAND_LINE = 'printk.time=0 '
+
+ def wait_for_console_pattern(self, success_message, vm=None):
+ wait_for_console_pattern(self, success_message,
+ failure_message='Kernel panic - not syncing',
+ vm=vm)
+
+
+class S390CPUTopology(LinuxKernelTest):
+ """
+ S390x CPU topology consist of 4 topology layers, from bottom to top,
+ the cores, sockets, books and drawers and 2 modifiers attributes,
+ the entitlement and the dedication.
+ See: docs/system/s390x/cpu-topology.rst.
+
+ S390x CPU topology is setup in different ways:
+ - implicitely from the '-smp' argument by completing each topology
+ level one after the other begining with drawer 0, book 0 and socket 0.
+ - explicitely from the '-device' argument on the QEMU command line
+ - explicitely by hotplug of a new CPU using QMP or HMP
+ - it is modified by using QMP 'set-cpu-topology'
+
+ The S390x modifier attribute entitlement depends on the machine
+ polarization, which can be horizontal or vertical.
+ The polarization is changed on a request from the guest.
+ """
+ timeout = 90
+
+
+ def check_topology(self, c, s, b, d, e, t):
+ res = self.vm.qmp('query-cpus-fast')
+ line = res['return']
+ for x in line:
+ core = x['props']['core-id']
+ socket = x['props']['socket-id']
+ book = x['props']['book-id']
+ drawer = x['props']['drawer-id']
+ entitlement = x['entitlement']
+ dedicated = x['dedicated']
+ if core == c:
+ self.assertEqual(drawer, d)
+ self.assertEqual(book, b)
+ self.assertEqual(socket, s)
+ self.assertEqual(entitlement, e)
+ self.assertEqual(dedicated, t)
+
+ def kernel_init(self):
+ """
+ We need a kernel supporting the CPU topology.
+ We need a minimal root filesystem with a shell.
+ """
+ kernel_url = ('https://archives.fedoraproject.org/pub/archive'
+ '/fedora-secondary/releases/35/Server/s390x/os'
+ '/images/kernel.img')
+ kernel_hash = '0d1aaaf303f07cf0160c8c48e56fe638'
+ kernel_path = self.fetch_asset(kernel_url, algorithm='md5',
+ asset_hash=kernel_hash)
+
+ initrd_url = ('https://archives.fedoraproject.org/pub/archive'
+ '/fedora-secondary/releases/35/Server/s390x/os'
+ '/images/initrd.img')
+ initrd_hash = 'a122057d95725ac030e2ec51df46e172'
+ initrd_path_xz = self.fetch_asset(initrd_url, algorithm='md5',
+ asset_hash=initrd_hash)
+ initrd_path = os.path.join(self.workdir, 'initrd-raw.img')
+ archive.lzma_uncompress(initrd_path_xz, initrd_path)
+
+ self.vm.set_console()
+ kernel_command_line = (self.KERNEL_COMMON_COMMAND_LINE +
+ 'root=/dev/ram '
+ 'selinux=0 '
+ 'rdinit=/bin/sh')
+ self.vm.add_args('-nographic',
+ '-enable-kvm',
+ '-cpu', 'z14,ctop=on',
+ '-m', '512',
+ '-name', 'Some Guest Name',
+ '-uuid', '30de4fd9-b4d5-409e-86a5-09b387f70bfa',
+ '-kernel', kernel_path,
+ '-initrd', initrd_path,
+ '-append', kernel_command_line)
+
+ def test_single(self):
+ self.kernel_init()
+ self.vm.launch()
+ self.wait_for_console_pattern('no job control')
+ self.check_topology(0, 0, 0, 0, 'horizontal', False)
+
+ def test_default(self):
+ """
+ This test checks the implicite topology.
+
+ :avocado: tags=arch:s390x
+ :avocado: tags=machine:s390-ccw-virtio
+ """
+ self.kernel_init()
+ self.vm.add_args('-smp',
+ '13,drawers=2,books=2,sockets=3,cores=2,maxcpus=24')
+ self.vm.launch()
+ self.wait_for_console_pattern('no job control')
+ self.check_topology(0, 0, 0, 0, 'horizontal', False)
+ self.check_topology(1, 0, 0, 0, 'horizontal', False)
+ self.check_topology(2, 1, 0, 0, 'horizontal', False)
+ self.check_topology(3, 1, 0, 0, 'horizontal', False)
+ self.check_topology(4, 2, 0, 0, 'horizontal', False)
+ self.check_topology(5, 2, 0, 0, 'horizontal', False)
+ self.check_topology(6, 0, 1, 0, 'horizontal', False)
+ self.check_topology(7, 0, 1, 0, 'horizontal', False)
+ self.check_topology(8, 1, 1, 0, 'horizontal', False)
+ self.check_topology(9, 1, 1, 0, 'horizontal', False)
+ self.check_topology(10, 2, 1, 0, 'horizontal', False)
+ self.check_topology(11, 2, 1, 0, 'horizontal', False)
+ self.check_topology(12, 0, 0, 1, 'horizontal', False)
+
+ def test_move(self):
+ """
+ This test checks the topology modification by moving a CPU
+ to another socket: CPU 0 is moved from socket 0 to socket 2.
+
+ :avocado: tags=arch:s390x
+ :avocado: tags=machine:s390-ccw-virtio
+ """
+ self.kernel_init()
+ self.vm.add_args('-smp',
+ '1,drawers=2,books=2,sockets=3,cores=2,maxcpus=24')
+ self.vm.launch()
+ self.wait_for_console_pattern('no job control')
+
+ self.check_topology(0, 0, 0, 0, 'horizontal', False)
+ res = self.vm.qmp('set-cpu-topology',
+ {'core-id': 0, 'socket-id': 2, 'entitlement': 'low'})
+ self.assertEqual(res['return'], {})
+ self.check_topology(0, 2, 0, 0, 'horizontal', False)
+
+ def test_hotplug(self):
+ """
+ This test verifies that a CPU defined with '-device' command line
+ argument finds its right place inside the topology.
+
+ :avocado: tags=arch:s390x
+ :avocado: tags=machine:s390-ccw-virtio
+ """
+ self.kernel_init()
+ self.vm.add_args('-smp',
+ '1,drawers=2,books=2,sockets=3,cores=2,maxcpus=24')
+ self.vm.add_args('-device', 'z14-s390x-cpu,core-id=10')
+ self.vm.launch()
+ self.wait_for_console_pattern('no job control')
+
+ self.check_topology(10, 2, 1, 0, 'horizontal', False)
+
+ def test_hotplug_full(self):
+ """
+ This test verifies that a hotplugged fully defined with '-device'
+ command line argument finds its right place inside the topology.
+
+ :avocado: tags=arch:s390x
+ :avocado: tags=machine:s390-ccw-virtio
+ """
+ self.kernel_init()
+ self.vm.add_args('-smp',
+ '1,drawers=2,books=2,sockets=3,cores=2,maxcpus=24')
+ self.vm.add_args('-device',
+ 'z14-s390x-cpu,'
+ 'core-id=1,socket-id=1,book-id=1,drawer-id=1')
+ self.vm.launch()
+ self.wait_for_console_pattern('no job control')
+ self.check_topology(1, 1, 1, 1, 'horizontal', False)
+
--
2.31.1
