Re: [RFC v4 01/21] vfio-user: introduce vfio-user protocol specification

[John Johnson]

> On Mar 9, 2022, at 2:34 PM, Alex Williamson <alex.williamson@redhat.com> 
> wrote:
> 
> On Tue, 11 Jan 2022 16:43:37 -0800
> John Johnson <john.g.johnson@oracle.com> wrote:
>> 
>> +
>> +VFIO region type cap header
>> +"""""""""""""""""""""""""""
>> +
>> ++------------------+---------------------------+
>> +| Name             | Value                     |
>> ++==================+===========================+
>> +| id               | VFIO_REGION_INFO_CAP_TYPE |
>> ++------------------+---------------------------+
>> +| version          | 0x1                       |
>> ++------------------+---------------------------+
>> +| next             | <next>                    |
>> ++------------------+---------------------------+
>> +| region info type | VFIO region info type     |
>> ++------------------+---------------------------+
>> +
>> +This capability is defined when a region is specific to the device.
>> +
>> +VFIO region info type cap
>> +"""""""""""""""""""""""""
>> +
>> +The VFIO region info type is defined in ``<linux/vfio.h>``
>> +(``struct vfio_region_info_cap_type``).
>> +
>> ++---------+--------+------+
>> +| Name    | Offset | Size |
>> ++=========+========+======+
>> +| type    | 0      | 4    |
>> ++---------+--------+------+
>> +| subtype | 4      | 4    |
>> ++---------+--------+------+
>> +
>> +The only device-specific region type and subtype supported by vfio-user is
>> +``VFIO_REGION_TYPE_MIGRATION`` (3) and ``VFIO_REGION_SUBTYPE_MIGRATION`` 
>> (1).
> 
> These should be considered deprecated from the kernel interface.  I
> hope there are plans for vfio-user to adopt the new interface that's
> currently available in linux-next and intended for v5.18.
> 


        I re-issued the series without v1 migration support, but I
haven’t seen any additional feedback.  What do you think the next step
should be?  Wait for v2 to be pulled and merge it?  Something else?
Thank you.

                                                JJ


no migration URL:
https://lists.gnu.org/archive/html/qemu-devel/2022-05/msg01105.html