mirror of
https://github.com/Motorhead1991/qemu.git
synced 2025-08-03 07:43:54 -06:00
a6f2f9c42f
Define a list of vfio devices in CPR state, in a subsection so that older QEMU can be live updated to this version. However, new QEMU will not be live updateable to old QEMU. This is acceptable because CPR is not yet commonly used, and updates to older versions are unusual. The contents of each device object will be defined by the vfio subsystem in a subsequent patch. Signed-off-by: Steve Sistare <steven.sistare@oracle.com> Reviewed-by: Zhenzhong Duan <zhenzhong.duan@intel.com> Link: https://lore.kernel.org/qemu-devel/1751493538-202042-14-git-send-email-steven.sistare@oracle.com Signed-off-by: Cédric Le Goater <clg@redhat.com>
88 lines
2.3 KiB
C
88 lines
2.3 KiB
C
/*
|
|
* Copyright (c) 2024-2025 Oracle and/or its affiliates.
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0-or-later
|
|
*/
|
|
|
|
#include "qemu/osdep.h"
|
|
#include "qapi/error.h"
|
|
#include "hw/vfio/vfio-cpr.h"
|
|
#include "migration/blocker.h"
|
|
#include "migration/cpr.h"
|
|
#include "migration/migration.h"
|
|
#include "migration/vmstate.h"
|
|
#include "system/iommufd.h"
|
|
#include "vfio-iommufd.h"
|
|
|
|
const VMStateDescription vmstate_cpr_vfio_devices; /* TBD in a later patch */
|
|
|
|
static bool vfio_cpr_supported(IOMMUFDBackend *be, Error **errp)
|
|
{
|
|
if (!iommufd_change_process_capable(be)) {
|
|
if (errp) {
|
|
error_setg(errp, "vfio iommufd backend does not support "
|
|
"IOMMU_IOAS_CHANGE_PROCESS");
|
|
}
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static const VMStateDescription iommufd_cpr_vmstate = {
|
|
.name = "iommufd",
|
|
.version_id = 0,
|
|
.minimum_version_id = 0,
|
|
.needed = cpr_incoming_needed,
|
|
.fields = (VMStateField[]) {
|
|
VMSTATE_END_OF_LIST()
|
|
}
|
|
};
|
|
|
|
bool vfio_iommufd_cpr_register_iommufd(IOMMUFDBackend *be, Error **errp)
|
|
{
|
|
Error **cpr_blocker = &be->cpr_blocker;
|
|
|
|
if (!vfio_cpr_supported(be, cpr_blocker)) {
|
|
return migrate_add_blocker_modes(cpr_blocker, errp,
|
|
MIG_MODE_CPR_TRANSFER, -1) == 0;
|
|
}
|
|
|
|
vmstate_register(NULL, -1, &iommufd_cpr_vmstate, be);
|
|
|
|
return true;
|
|
}
|
|
|
|
void vfio_iommufd_cpr_unregister_iommufd(IOMMUFDBackend *be)
|
|
{
|
|
vmstate_unregister(NULL, &iommufd_cpr_vmstate, be);
|
|
migrate_del_blocker(&be->cpr_blocker);
|
|
}
|
|
|
|
bool vfio_iommufd_cpr_register_container(VFIOIOMMUFDContainer *container,
|
|
Error **errp)
|
|
{
|
|
VFIOContainerBase *bcontainer = &container->bcontainer;
|
|
|
|
migration_add_notifier_mode(&bcontainer->cpr_reboot_notifier,
|
|
vfio_cpr_reboot_notifier,
|
|
MIG_MODE_CPR_REBOOT);
|
|
|
|
vfio_cpr_add_kvm_notifier();
|
|
|
|
return true;
|
|
}
|
|
|
|
void vfio_iommufd_cpr_unregister_container(VFIOIOMMUFDContainer *container)
|
|
{
|
|
VFIOContainerBase *bcontainer = &container->bcontainer;
|
|
|
|
migration_remove_notifier(&bcontainer->cpr_reboot_notifier);
|
|
}
|
|
|
|
void vfio_iommufd_cpr_register_device(VFIODevice *vbasedev)
|
|
{
|
|
}
|
|
|
|
void vfio_iommufd_cpr_unregister_device(VFIODevice *vbasedev)
|
|
{
|
|
}
|