xref: /qemu/tests/functional/test_x86_64_hotplug_cpu.py (revision 3f8bcbba3b320c610689576fc47595f1076198dd) 
1#!/usr/bin/env python3
2#
3# Functional test that hotplugs a CPU and checks it on a Linux guest
4#
5# Copyright (c) 2021 Red Hat, Inc.
6#
7# Author:
8#  Cleber Rosa <crosa@redhat.com>
9#
10# This work is licensed under the terms of the GNU GPL, version 2 or
11# later.  See the COPYING file in the top-level directory.
12
13from qemu_test import LinuxKernelTest, Asset, exec_command_and_wait_for_pattern
14
15
16class HotPlugCPU(LinuxKernelTest):
17
18    ASSET_KERNEL = Asset(
19        ('https://archives.fedoraproject.org/pub/archive/fedora/linux/releases'
20         '/31/Server/x86_64/os/images/pxeboot/vmlinuz'),
21        'd4738d03dbbe083ca610d0821d0a8f1488bebbdccef54ce33e3adb35fda00129')
22
23    ASSET_INITRD = Asset(
24        ('https://archives.fedoraproject.org/pub/archive/fedora/linux/releases'
25         '/31/Server/x86_64/os/images/pxeboot/initrd.img'),
26        '277cd6c7adf77c7e63d73bbb2cded8ef9e2d3a2f100000e92ff1f8396513cd8b')
27
28    def test_hotplug(self):
29
30        self.require_accelerator('kvm')
31        self.vm.add_args('-accel', 'kvm')
32        self.vm.add_args('-cpu', 'Haswell')
33        self.vm.add_args('-smp', '1,sockets=1,cores=2,threads=1,maxcpus=2')
34        self.vm.add_args('-m', '1G')
35        self.vm.add_args('-append', 'console=ttyS0 rd.rescue')
36
37        self.launch_kernel(self.ASSET_KERNEL.fetch(),
38                           self.ASSET_INITRD.fetch(),
39                           wait_for='Entering emergency mode.')
40        prompt = '# '
41        self.wait_for_console_pattern(prompt)
42
43        exec_command_and_wait_for_pattern(self,
44                                          'cd /sys/devices/system/cpu/cpu0',
45                                          'cpu0#')
46        exec_command_and_wait_for_pattern(self,
47                                          'cd /sys/devices/system/cpu/cpu1',
48                                          'No such file or directory')
49
50        self.vm.cmd('device_add',
51                    driver='Haswell-x86_64-cpu',
52                    id='c1',
53                    socket_id=0,
54                    core_id=1,
55                    thread_id=0)
56        self.wait_for_console_pattern('CPU1 has been hot-added')
57
58        exec_command_and_wait_for_pattern(self,
59                                          'cd /sys/devices/system/cpu/cpu1',
60                                          'cpu1#')
61
62        exec_command_and_wait_for_pattern(self, 'cd ..', prompt)
63        self.vm.cmd('device_del', id='c1')
64
65        exec_command_and_wait_for_pattern(self,
66                                    'while cd /sys/devices/system/cpu/cpu1 ;'
67                                    ' do sleep 0.2 ; done',
68                                    'No such file or directory')
69
70if __name__ == '__main__':
71    LinuxKernelTest.main()
72