On 2020/9/23 7:24, Kirti Wankhede wrote:
Patch 4-9:
- Generic migration functionality for VFIO device.
* This patch set adds functionality for PCI devices, but can be
extended to other VFIO devices.
* Added all the basic functions required for pre-copy, stop-and-copy and
resume phases of migration.
* Added state change notifier and from that notifier function, VFIO
device's state changed is conveyed to VFIO device driver.
* During save setup phase and resume/load setup phase, migration region
is queried and is used to read/write VFIO device data.
* .save_live_pending and .save_live_iterate are implemented to use QEMU's
functionality of iteration during pre-copy phase.
* In .save_live_complete_precopy, that is in stop-and-copy phase,
iteration to read data from VFIO device driver is implemented till pending
bytes returned by driver are not zero.
s/are not zero/are zero/ ?
[...]
Live migration resume path:
Incomming migration calls .load_setup for each device
(RESTORE_VM, _ACTIVE, STOPPED)
The _RESUMING device state is missed here?
|
For each device, .load_state is called for that device section data
|
At the end, called .load_cleanup for each device and vCPUs are started.
|
(RUNNING, _NONE, _RUNNING)
Thanks,
Zenghui
