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vfio/migration: Setup and cleanup multifd transfer in these general methods

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Wire VFIO multifd transfer specific setup and cleanup functions into
general VFIO load/save setup and cleanup methods.

Signed-off-by: Maciej S. Szmigiero <maciej.szmigiero@oracle.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Link: https://lore.kernel.org/qemu-devel/b1f864a65fafd4fdab1f89230df52e46ae41f2ac.1741124640.git.maciej.szmigiero@oracle.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>
This commit is contained in:
Maciej S. Szmigiero 2025-03-04 23:03:52 +01:00 • committed by Cédric Le Goater
parent ff2fd1f7e2
commit 6bcffb1cad
1 changed files with 22 additions and 2 deletions
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24
hw/vfio/migration.c
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@ -453,6 +453,10 @@ static int vfio_save_setup(QEMUFile *f, void *opaque, Error **errp)
uint64_t stop_copy_size = VFIO_MIG_DEFAULT_DATA_BUFFER_SIZE;
int ret;
if (!vfio_multifd_setup(vbasedev, false, errp)) {
return -EINVAL;
}
qemu_put_be64(f, VFIO_MIG_FLAG_DEV_SETUP_STATE);
vfio_query_stop_copy_size(vbasedev, &stop_copy_size);
@ -509,6 +513,9 @@ static void vfio_save_cleanup(void *opaque)
Error *local_err = NULL;
int ret;
/* Currently a NOP, done for symmetry with load_cleanup() */
vfio_multifd_cleanup(vbasedev);
/*
* Changing device state from STOP_COPY to STOP can take time. Do it here,
* after migration has completed, so it won't increase downtime.
@ -674,15 +681,28 @@ static void vfio_save_state(QEMUFile *f, void *opaque)
static int vfio_load_setup(QEMUFile *f, void *opaque, Error **errp)
{
VFIODevice *vbasedev = opaque;
VFIOMigration *migration = vbasedev->migration;
int ret;
return vfio_migration_set_state(vbasedev, VFIO_DEVICE_STATE_RESUMING,
vbasedev->migration->device_state, errp);
if (!vfio_multifd_setup(vbasedev, true, errp)) {
return -EINVAL;
}
ret = vfio_migration_set_state(vbasedev, VFIO_DEVICE_STATE_RESUMING,
migration->device_state, errp);
if (ret) {
return ret;
}
return 0;
}
static int vfio_load_cleanup(void *opaque)
{
VFIODevice *vbasedev = opaque;
vfio_multifd_cleanup(vbasedev);
vfio_migration_cleanup(vbasedev);
trace_vfio_load_cleanup(vbasedev->name);