Paolo Bonzini <pbonz...@redhat.com> writes:

> Il 20/06/2013 04:40, Rusty Russell ha scritto:
>> Paolo Bonzini <pbonz...@redhat.com> writes:
>>> Il 19/06/2013 10:24, Michael S. Tsirkin ha scritto:
>>>>>> 2) We introduce VIRTIO_NET_F_ANY_LAYOUT and VIRTIO_BLK_F_ANY_LAYOUT
>>>>>>    specifically for net and block (note the new names).
>>>
>>> So why not a transport feature?  Is it just because the SCSI commands
>>> for virtio-blk also require a config space field?  Sorry if I missed
>>> this upthread.
>> 
>> Mainly because I'm not sure that *all* devices are now safe.  Are they?
>
> virtio-scsi's implementation in QEMU is not safe (been delaying that for
> too long, sorry), but the spec is safe.

Then if we added a transport feature, we couldn't use it :(

So I think it needs to be a per-device feature bit.

Cheers,
Rusty.
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