Re: [libvirt] [PATCH v2 1/2] vfio/mdev: add version attribute for mdev device

Boris Fiuczynski
2019-05-09T06:45:59Z

On 5/8/19 11:22 PM, Alex Williamson wrote:
>>> I thought there was a request to make this more specific to migration
>>> by renaming it to something like migration_version. Also, as an
>>>
>> so this attribute may not only include a mdev device's parent device info and
>> mdev type, but also include numeric software version of vendor specific
>> migration code, right?
> It's a vendor defined string, it should be considered opaque to the
> user, the vendor can include whatever they feel is relevant.
>
Would a vendor also be allowed to provide a string expressing required
features as well as containing backend resource requirements which need
to be compatible for a successful migration? Somehow a bit like a cpu
model... maybe even as json or xml...
I am asking this with vfio-ap in mind. In that context checking
compatibility of two vfio-ap mdev devices is not as simple as checking
if version A is smaller or equal to version B.

--
Mit freundlichen Grüßen/Kind regards
Boris Fiuczynski

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