54d31236b9
sysemu/sysemu.h is a rather unfocused dumping ground for stuff related to the system-emulator. Evidence: * It's included widely: in my "build everything" tree, changing sysemu/sysemu.h still triggers a recompile of some 1100 out of 6600 objects (not counting tests and objects that don't depend on qemu/osdep.h, down from 5400 due to the previous two commits). * It pulls in more than a dozen additional headers. Split stuff related to run state management into its own header sysemu/runstate.h. Touching sysemu/sysemu.h now recompiles some 850 objects. qemu/uuid.h also drops from 1100 to 850, and qapi/qapi-types-run-state.h from 4400 to 4200. Touching new sysemu/runstate.h recompiles some 500 objects. Since I'm touching MAINTAINERS to add sysemu/runstate.h anyway, also add qemu/main-loop.h. Suggested-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20190812052359.30071-30-armbru@redhat.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> [Unbreak OS-X build]
63 lines
2 KiB
C
63 lines
2 KiB
C
/*
|
|
* qdev vm change state handlers
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License,
|
|
* or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "qemu/osdep.h"
|
|
#include "hw/qdev-core.h"
|
|
#include "sysemu/runstate.h"
|
|
|
|
static int qdev_get_dev_tree_depth(DeviceState *dev)
|
|
{
|
|
int depth;
|
|
|
|
for (depth = 0; dev; depth++) {
|
|
BusState *bus = dev->parent_bus;
|
|
|
|
if (!bus) {
|
|
break;
|
|
}
|
|
|
|
dev = bus->parent;
|
|
}
|
|
|
|
return depth;
|
|
}
|
|
|
|
/**
|
|
* qdev_add_vm_change_state_handler:
|
|
* @dev: the device that owns this handler
|
|
* @cb: the callback function to be invoked
|
|
* @opaque: user data passed to the callback function
|
|
*
|
|
* This function works like qemu_add_vm_change_state_handler() except callbacks
|
|
* are invoked in qdev tree depth order. Ordering is desirable when callbacks
|
|
* of children depend on their parent's callback having completed first.
|
|
*
|
|
* For example, when qdev_add_vm_change_state_handler() is used, a host
|
|
* controller's callback is invoked before the children on its bus when the VM
|
|
* starts running. The order is reversed when the VM stops running.
|
|
*
|
|
* Returns: an entry to be freed with qemu_del_vm_change_state_handler()
|
|
*/
|
|
VMChangeStateEntry *qdev_add_vm_change_state_handler(DeviceState *dev,
|
|
VMChangeStateHandler *cb,
|
|
void *opaque)
|
|
{
|
|
int depth = qdev_get_dev_tree_depth(dev);
|
|
|
|
return qemu_add_vm_change_state_handler_prio(cb, opaque, depth);
|
|
}
|