Import QEMU upstream snapshot d2e570c

Upstream: https://gitlab.com/qemu-project/qemu.git

Upstream-Commit: d2e570cc0f97b936902a5b1b86b73c0f5998b475

tests/functional/x86_64/test_hotplug_cpu.py

@@ -0,0 +1,71 @@
+#!/usr/bin/env python3
+#
+# Functional test that hotplugs a CPU and checks it on a Linux guest
+#
+# Copyright (c) 2021 Red Hat, Inc.
+#
+# Author:
+#  Cleber Rosa <[email protected]>
+#
+# This work is licensed under the terms of the GNU GPL, version 2 or
+# later.  See the COPYING file in the top-level directory.
+
+from qemu_test import LinuxKernelTest, Asset, exec_command_and_wait_for_pattern
+
+
+class HotPlugCPU(LinuxKernelTest):
+
+    ASSET_KERNEL = Asset(
+        ('https://archives.fedoraproject.org/pub/archive/fedora/linux/releases'
+         '/31/Server/x86_64/os/images/pxeboot/vmlinuz'),
+        'd4738d03dbbe083ca610d0821d0a8f1488bebbdccef54ce33e3adb35fda00129')
+
+    ASSET_INITRD = Asset(
+        ('https://archives.fedoraproject.org/pub/archive/fedora/linux/releases'
+         '/31/Server/x86_64/os/images/pxeboot/initrd.img'),
+        '277cd6c7adf77c7e63d73bbb2cded8ef9e2d3a2f100000e92ff1f8396513cd8b')
+
+    def test_hotplug(self):
+
+        self.require_accelerator('kvm')
+        self.vm.add_args('-accel', 'kvm')
+        self.vm.add_args('-cpu', 'Haswell')
+        self.vm.add_args('-smp', '1,sockets=1,cores=2,threads=1,maxcpus=2')
+        self.vm.add_args('-m', '1G')
+        self.vm.add_args('-append', 'console=ttyS0 rd.rescue')
+
+        self.launch_kernel(self.ASSET_KERNEL.fetch(),
+                           self.ASSET_INITRD.fetch(),
+                           wait_for='Entering emergency mode.')
+        prompt = '# '
+        self.wait_for_console_pattern(prompt)
+
+        exec_command_and_wait_for_pattern(self,
+                                          'cd /sys/devices/system/cpu/cpu0',
+                                          'cpu0#')
+        exec_command_and_wait_for_pattern(self,
+                                          'cd /sys/devices/system/cpu/cpu1',
+                                          'No such file or directory')
+
+        self.vm.cmd('device_add',
+                    driver='Haswell-x86_64-cpu',
+                    id='c1',
+                    socket_id=0,
+                    core_id=1,
+                    thread_id=0)
+        self.wait_for_console_pattern('CPU1 has been hot-added')
+
+        exec_command_and_wait_for_pattern(self,
+                                          'cd /sys/devices/system/cpu/cpu1',
+                                          'cpu1#')
+
+        exec_command_and_wait_for_pattern(self, 'cd ..', prompt)
+        self.vm.cmd('device_del', id='c1')
+
+        exec_command_and_wait_for_pattern(self,
+                                    'while cd /sys/devices/system/cpu/cpu1 ;'
+                                    ' do sleep 0.2 ; done',
+                                    'No such file or directory')
+
+if __name__ == '__main__':
+    LinuxKernelTest.main()