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, BusState *bus, 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 bool qdev_hotunplug_allowed(DeviceState *dev, Error **errp) 51 { 52 return !qdev_unplug_blocked(dev, errp); 53 } 54 55 HotplugHandler *qdev_get_bus_hotplug_handler(DeviceState *dev) 56 { 57 if (dev->parent_bus) { 58 return dev->parent_bus->hotplug_handler; 59 } 60 return NULL; 61 } 62 63 HotplugHandler *qdev_get_hotplug_handler(DeviceState *dev) 64 { 65 HotplugHandler *hotplug_ctrl = qdev_get_machine_hotplug_handler(dev); 66 67 if (hotplug_ctrl == NULL && dev->parent_bus) { 68 hotplug_ctrl = qdev_get_bus_hotplug_handler(dev); 69 } 70 return hotplug_ctrl; 71 } 72 73 /* can be used as ->unplug() callback for the simple cases */ 74 void qdev_simple_device_unplug_cb(HotplugHandler *hotplug_dev, 75 DeviceState *dev, Error **errp) 76 { 77 qdev_unrealize(dev); 78 } 79