Re: [PATCH v12 09/14] s390/vfio-ap: File ops called to resume the vfio device migration

[sashiko-bot@kernel.org]

> Implements the 'write' callback function for the file stream created to
> restore the state of the vfio-ap device on the destination host during the
> RESUMING phase.
> 
> Userspace reads the source guest's saved AP configuration metadata from the
> STOP_COPY stream and writes it to this stream in chunks. The write callback
> accumulates the stream into a pre-allocated vfio_ap_config buffer. Once all
> data has arrived, the configuration is validated against the destination
> mdev's pre-configured shadow_apcb and hardware capabilities.
> 
> In order for the source guest's configuration to be considered compatible:
> * The migration data must carry the expected magic number and version.
> * Every APQN and control domain in the source configuration must be present
>   in the destination mdev's shadow_apcb.
> * The hardware facilities and AP type of each queue must be compatible
>   between source and destination.
> 
> Signed-off-by: Anthony Krowiak <akrowiak@linux.ibm.com>

Sashiko has reviewed this patch and found no issues.

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20261106152259.1360651-1-akrowiak@linux.ibm.com?part=9