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/*
* Copyright (c) 2021-2024 Oracle and/or its affiliates.
*
* 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/vfio/vfio-device.h"
#include "hw/vfio/vfio-cpr.h"
#include "hw/vfio/pci.h"
#include "migration/cpr.h"
#include "qapi/error.h"
#include "system/runstate.h"
int vfio_cpr_reboot_notifier(NotifierWithReturn *notifier,
MigrationEvent *e, Error **errp)
{
if (e->type == MIG_EVENT_PRECOPY_SETUP &&
!runstate_check(RUN_STATE_SUSPENDED) && !vm_get_suspended()) {
error_setg(errp,
"VFIO device only supports cpr-reboot for runstate suspended");
return -1;
}
return 0;
}
bool vfio_cpr_register_container(VFIOContainerBase *bcontainer, Error **errp)
{
migration_add_notifier_mode(&bcontainer->cpr_reboot_notifier,
vfio_cpr_reboot_notifier,
MIG_MODE_CPR_REBOOT);
return true;
}
void vfio_cpr_unregister_container(VFIOContainerBase *bcontainer)
{
migration_remove_notifier(&bcontainer->cpr_reboot_notifier);
}
/*
* The kernel may change non-emulated config bits. Exclude them from the
* changed-bits check in get_pci_config_device.
*/
static int vfio_cpr_pci_pre_load(void *opaque)
{
VFIOPCIDevice *vdev = opaque;
PCIDevice *pdev = &vdev->pdev;
int size = MIN(pci_config_size(pdev), vdev->config_size);
int i;
for (i = 0; i < size; i++) {
pdev->cmask[i] &= vdev->emulated_config_bits[i];
}
return 0;
}
const VMStateDescription vfio_cpr_pci_vmstate = {
.name = "vfio-cpr-pci",
.version_id = 0,
.minimum_version_id = 0,
.pre_load = vfio_cpr_pci_pre_load,
.needed = cpr_incoming_needed,
.fields = (VMStateField[]) {
VMSTATE_END_OF_LIST()
}
};
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