qemu

FORK: QEMU emulator
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qdev-hotplug.c (1810B)

      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 }