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| author | Maciej S. Szmigiero <maciej.szmigiero@oracle.com> | 2025-03-04 23:03:53 +0100 |
|---|---|---|
| committer | Cédric Le Goater <clg@redhat.com> | 2025-03-06 06:47:34 +0100 |
| commit | 3228d311ab1882f75b04d080d33a71fc7a0bcac5 (patch) | |
| tree | 3189ee2109c686efb16d38c73611571cbdbc377c /hw/vfio/migration.c | |
| parent | 6bcffb1cad5b2b45152c0faa1133c96d3f129914 (diff) | |
| download | qemu-3228d311ab1882f75b04d080d33a71fc7a0bcac5.zip qemu-3228d311ab1882f75b04d080d33a71fc7a0bcac5.tar.gz qemu-3228d311ab1882f75b04d080d33a71fc7a0bcac5.tar.bz2 | |
vfio/migration: Multifd device state transfer support - received buffers queuing
The multifd received data needs to be reassembled since device state
packets sent via different multifd channels can arrive out-of-order.
Therefore, each VFIO device state packet carries a header indicating its
position in the stream.
The raw device state data is saved into a VFIOStateBuffer for later
in-order loading into the device.
The last such VFIO device state packet should have
VFIO_DEVICE_STATE_CONFIG_STATE flag set and carry the device config state.
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/e3bff515a8d61c582b94b409eb12a45b1a143a69.1741124640.git.maciej.szmigiero@oracle.com
[ clg: - Reordered savevm_vfio_handlers
- Added load_state_buffer documentation ]
Signed-off-by: Cédric Le Goater <clg@redhat.com>
Diffstat (limited to 'hw/vfio/migration.c')
| -rw-r--r-- | hw/vfio/migration.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/hw/vfio/migration.c b/hw/vfio/migration.c index 3c8286a..2cdb923 100644 --- a/hw/vfio/migration.c +++ b/hw/vfio/migration.c @@ -802,6 +802,10 @@ static const SaveVMHandlers savevm_vfio_handlers = { .load_cleanup = vfio_load_cleanup, .load_state = vfio_load_state, .switchover_ack_needed = vfio_switchover_ack_needed, + /* + * Multifd support + */ + .load_state_buffer = vfio_multifd_load_state_buffer, }; /* ---------------------------------------------------------------------- */ |