LXR qemu/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
  16HotplugHandler *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
  33bool 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
  50HotplugHandler *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
  58HotplugHandler *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 */
  69void qdev_simple_device_unplug_cb(HotplugHandler *hotplug_dev,
  70                                  DeviceState *dev, Error **errp)
  71{
  72    qdev_unrealize(dev);
  73}
  74