Merge tag 'net-pull-request' of https://github.com/jasowang/qemu into staging
[qemu.git] / hw / core / qdev-hotplug.c
1 /*
2 * QDev Hotplug handlers
3 *
4 * Copyright (c) Red Hat
5 *
6 * SPDX-License-Identifier: GPL-2.0-or-later
7 *
8 * This work is licensed under the terms of the GNU GPL, version 2 or later.
9 * See the COPYING file in the top-level directory.
10 */
11
12 #include "qemu/osdep.h"
13 #include "hw/qdev-core.h"
14 #include "hw/boards.h"
15
16 HotplugHandler *qdev_get_machine_hotplug_handler(DeviceState *dev)
17 {
18 MachineState *machine;
19 MachineClass *mc;
20 Object *m_obj = qdev_get_machine();
21
22 if (object_dynamic_cast(m_obj, TYPE_MACHINE)) {
23 machine = MACHINE(m_obj);
24 mc = MACHINE_GET_CLASS(machine);
25 if (mc->get_hotplug_handler) {
26 return mc->get_hotplug_handler(machine, dev);
27 }
28 }
29
30 return NULL;
31 }
32
33 bool qdev_hotplug_allowed(DeviceState *dev, Error **errp)
34 {
35 MachineState *machine;
36 MachineClass *mc;
37 Object *m_obj = qdev_get_machine();
38
39 if (object_dynamic_cast(m_obj, TYPE_MACHINE)) {
40 machine = MACHINE(m_obj);
41 mc = MACHINE_GET_CLASS(machine);
42 if (mc->hotplug_allowed) {
43 return mc->hotplug_allowed(machine, dev, errp);
44 }
45 }
46
47 return true;
48 }
49
50 HotplugHandler *qdev_get_bus_hotplug_handler(DeviceState *dev)
51 {
52 if (dev->parent_bus) {
53 return dev->parent_bus->hotplug_handler;
54 }
55 return NULL;
56 }
57
58 HotplugHandler *qdev_get_hotplug_handler(DeviceState *dev)
59 {
60 HotplugHandler *hotplug_ctrl = qdev_get_machine_hotplug_handler(dev);
61
62 if (hotplug_ctrl == NULL && dev->parent_bus) {
63 hotplug_ctrl = qdev_get_bus_hotplug_handler(dev);
64 }
65 return hotplug_ctrl;
66 }
67
68 /* can be used as ->unplug() callback for the simple cases */
69 void qdev_simple_device_unplug_cb(HotplugHandler *hotplug_dev,
70 DeviceState *dev, Error **errp)
71 {
72 qdev_unrealize(dev);
73 }