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/*
* QDev Hotplug handlers
*
* Copyright (c) Red Hat
*
* SPDX-License-Identifier: GPL-2.0-or-later
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "hw/qdev-core.h"
#include "hw/boards.h"
#include "qapi/error.h"
HotplugHandler *qdev_get_machine_hotplug_handler(DeviceState *dev)
{
MachineState *machine;
MachineClass *mc;
Object *m_obj = qdev_get_machine();
if (object_dynamic_cast(m_obj, TYPE_MACHINE)) {
machine = MACHINE(m_obj);
mc = MACHINE_GET_CLASS(machine);
if (mc->get_hotplug_handler) {
return mc->get_hotplug_handler(machine, dev);
}
}
return NULL;
}
static bool qdev_hotplug_unplug_allowed_common(DeviceState *dev, BusState *bus,
Error **errp)
{
DeviceClass *dc = DEVICE_GET_CLASS(dev);
if (!dc->hotpluggable) {
error_setg(errp, "Device '%s' does not support hotplugging",
object_get_typename(OBJECT(dev)));
return false;
}
if (bus) {
if (!qbus_is_hotpluggable(bus)) {
error_setg(errp, "Bus '%s' does not support hotplugging",
bus->name);
return false;
}
} else {
if (!qdev_get_machine_hotplug_handler(dev)) {
/*
* No bus, no machine hotplug handler --> device is not hotpluggable
*/
error_setg(errp,
"Device '%s' can not be hotplugged on this machine",
object_get_typename(OBJECT(dev)));
return false;
}
}
return true;
}
bool qdev_hotplug_allowed(DeviceState *dev, BusState *bus, Error **errp)
{
MachineState *machine;
MachineClass *mc;
Object *m_obj = qdev_get_machine();
if (!qdev_hotplug_unplug_allowed_common(dev, bus, errp)) {
return false;
}
if (object_dynamic_cast(m_obj, TYPE_MACHINE)) {
machine = MACHINE(m_obj);
mc = MACHINE_GET_CLASS(machine);
if (mc->hotplug_allowed) {
return mc->hotplug_allowed(machine, dev, errp);
}
}
return true;
}
bool qdev_hotunplug_allowed(DeviceState *dev, Error **errp)
{
return !qdev_unplug_blocked(dev, errp) &&
qdev_hotplug_unplug_allowed_common(dev, dev->parent_bus, errp);
}
HotplugHandler *qdev_get_bus_hotplug_handler(DeviceState *dev)
{
if (dev->parent_bus) {
return dev->parent_bus->hotplug_handler;
}
return NULL;
}
HotplugHandler *qdev_get_hotplug_handler(DeviceState *dev)
{
HotplugHandler *hotplug_ctrl = qdev_get_machine_hotplug_handler(dev);
if (hotplug_ctrl == NULL && dev->parent_bus) {
hotplug_ctrl = qdev_get_bus_hotplug_handler(dev);
}
return hotplug_ctrl;
}
/* can be used as ->unplug() callback for the simple cases */
void qdev_simple_device_unplug_cb(HotplugHandler *hotplug_dev,
DeviceState *dev, Error **errp)
{
qdev_unrealize(dev);
}
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