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qdev: Add qdev_add_vm_change_state_handler_full()

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Add qdev_add_vm_change_state_handler_full() variant that allows setting
a prepare callback in addition to the main callback.

This will facilitate adding P2P support for VFIO migration in the
following patches.

Signed-off-by: Avihai Horon <avihaih@nvidia.com>
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Tested-by: YangHang Liu <yanghliu@redhat.com>
Signed-off-by: Cédric Le Goater <clg@redhat.com>
This commit is contained in:
Avihai Horon 2023-08-02 11:14:46 +03:00 committed by Cédric Le Goater
parent 9d3103c81b
commit 02b2e25360
2 changed files with 16 additions and 1 deletions
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14
hw/core/vm-change-state-handler.c
View File

@ -55,8 +55,20 @@ static int qdev_get_dev_tree_depth(DeviceState *dev)
VMChangeStateEntry *qdev_add_vm_change_state_handler(DeviceState *dev,
VMChangeStateHandler *cb,
void *opaque)
{
return qdev_add_vm_change_state_handler_full(dev, cb, NULL, opaque);
}
/*
* Exactly like qdev_add_vm_change_state_handler() but passes a prepare_cb
* argument too.
*/
VMChangeStateEntry *qdev_add_vm_change_state_handler_full(
DeviceState *dev, VMChangeStateHandler *cb,
VMChangeStateHandler *prepare_cb, void *opaque)
{
int depth = qdev_get_dev_tree_depth(dev);
return qemu_add_vm_change_state_handler_prio(cb, opaque, depth);
return qemu_add_vm_change_state_handler_prio_full(cb, prepare_cb, opaque,
depth);
}

3
include/sysemu/runstate.h
View File

@ -23,6 +23,9 @@ qemu_add_vm_change_state_handler_prio_full(VMChangeStateHandler *cb,
VMChangeStateEntry *qdev_add_vm_change_state_handler(DeviceState *dev,
VMChangeStateHandler *cb,
void *opaque);
VMChangeStateEntry *qdev_add_vm_change_state_handler_full(
DeviceState *dev, VMChangeStateHandler *cb,
VMChangeStateHandler *prepare_cb, void *opaque);
void qemu_del_vm_change_state_handler(VMChangeStateEntry *e);
/**
* vm_state_notify: Notify the state of the VM