| 623af41d | 04-Mar-2025 |
Maciej S. Szmigiero <maciej.szmigiero@oracle.com> |
vfio/migration: Add x-migration-multifd-transfer VFIO property
This property allows configuring whether to transfer the particular device
state via multifd channels when live migrating that device.
vfio/migration: Add x-migration-multifd-transfer VFIO property
This property allows configuring whether to transfer the particular device
state via multifd channels when live migrating that device.
It defaults to AUTO, which means that VFIO device state transfer via
multifd channels is attempted in configurations that otherwise support it.
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/d6dbb326e3d53c7104d62c96c9e3dd64e1c7b940.1741124640.git.maciej.szmigiero@oracle.com
[ clg: Added documentation ]
Signed-off-by: Cédric Le Goater <clg@redhat.com>
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| c59748c1 | 04-Mar-2025 |
Maciej S. Szmigiero <maciej.szmigiero@oracle.com> |
vfio/migration: Multifd device state transfer support - load thread
Add a thread which loads the VFIO device state buffers that were received
via multifd.
Each VFIO device that has multifd device s
vfio/migration: Multifd device state transfer support - load thread
Add a thread which loads the VFIO device state buffers that were received
via multifd.
Each VFIO device that has multifd device state transfer enabled has one
such thread, which is created using migration core API
qemu_loadvm_start_load_thread().
Since it's important to finish loading device state transferred via the
main migration channel (via save_live_iterate SaveVMHandler) before
starting loading the data asynchronously transferred via multifd the thread
doing the actual loading of the multifd transferred data is only started
from switchover_start SaveVMHandler.
switchover_start handler is called when MIG_CMD_SWITCHOVER_START
sub-command of QEMU_VM_COMMAND is received via the main migration channel.
This sub-command is only sent after all save_live_iterate data have already
been posted so it is safe to commence loading of the multifd-transferred
device state upon receiving it - loading of save_live_iterate data happens
synchronously in the main migration thread (much like the processing of
MIG_CMD_SWITCHOVER_START) so by the time MIG_CMD_SWITCHOVER_START is
processed all the proceeding data must have already been loaded.
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/9abe612d775aaf42e31646796acd2363c723a57a.1741124640.git.maciej.szmigiero@oracle.com
[ clg: - Reordered savevm_vfio_handlers
- Added switchover_start documentation ]
Signed-off-by: Cédric Le Goater <clg@redhat.com>
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| 21e89f7a | 19-Jun-2024 |
Peter Xu <peterx@redhat.com> |
migration/docs: Update postcopy recover session for SETUP phase
Firstly, the "Paused" state was added in the wrong place before. The state
machine section was describing PostcopyState, rather than M
migration/docs: Update postcopy recover session for SETUP phase
Firstly, the "Paused" state was added in the wrong place before. The state
machine section was describing PostcopyState, rather than MigrationStatus.
Drop the Paused state descriptions.
Then in the postcopy recover session, add more information on the state
machine for MigrationStatus in the lines. Add the new RECOVER_SETUP phase.
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Signed-off-by: Peter Xu <peterx@redhat.com>
[fix typo s/reconnects/reconnect]
Signed-off-by: Fabiano Rosas <farosas@suse.de>
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| f165cdf1 | 14-Jan-2024 |
Bernhard Beschow <shentey@gmail.com> |
exec/ioport: Add portio_list_set_enabled()
Some SuperI/O devices such as the VIA south bridges or the PC87312 controller
allow to enable or disable their SuperI/O functions. Add a convenience functi
exec/ioport: Add portio_list_set_enabled()
Some SuperI/O devices such as the VIA south bridges or the PC87312 controller
allow to enable or disable their SuperI/O functions. Add a convenience function
for implementing this in the VIA south bridges.
The naming of the functions is inspired by its memory_region_set_enabled()
pendant.
Signed-off-by: Bernhard Beschow <shentey@gmail.com>
Message-Id: <20240114123911.4877-7-shentey@gmail.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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| eb9f6daa | 09-Jan-2024 |
Peter Xu <peterx@redhat.com> |
docs/migration: Further move virtio to be feature of migration
Move it one layer down, so taking Virtio-migration as a feature for
migration.
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Jason Wan
docs/migration: Further move virtio to be feature of migration
Move it one layer down, so taking Virtio-migration as a feature for
migration.
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Jason Wang <jasowang@redhat.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Link: https://lore.kernel.org/r/20240109064628.595453-11-peterx@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>
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| 66fd3b1a | 09-Jan-2024 |
Peter Xu <peterx@redhat.com> |
docs/migration: Further move vfio to be feature of migration
Move it one layer down, so taking VFIO-migration as a feature for
migration.
Cc: Alex Williamson <alex.williamson@redhat.com>
Cc: Cédric
docs/migration: Further move vfio to be feature of migration
Move it one layer down, so taking VFIO-migration as a feature for
migration.
Cc: Alex Williamson <alex.williamson@redhat.com>
Cc: Cédric Le Goater <clg@redhat.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Link: https://lore.kernel.org/r/20240109064628.595453-10-peterx@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>
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