Re: [PATCH 6/6] virtio-scsi: Enable DIF/DIX modes in SCSI host LLD

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On Tue, 2014-05-20 at 10:35 +0200, Paolo Bonzini wrote:
> Il 19/05/2014 21:07, Nicholas A. Bellinger ha scritto:
> > Hi MST,
> >
> > So I've finally got some cycles to get back to this code, and wanted to
> > verify the outstanding items you had previously raised:
> >
> > - Convert vhost-scsi to be independent of IOV layout using
> >   memcpy_fromiovecend. (Does this effect existing non PI virtio-scsi
> >   operation..?)
> > - Report VIRTIO_F_ANY_LAYOUT feature bit to userspace.
> > - Convert virtio_scsi_cmd_req_pi to bytes field instead of number of
> >   iovecs.
> 
> This is the only item really required, since the bytes field is what 
> will be in VIRTIO 1.0.  The other would be nice to have, but not a 
> blocker for PI support.
> 
> > - Ensure virtio_scsi_cmd_req_pi is naturally aligned
> 
> mst already commented on this.
> 
> > - Figure out why QEMU is not acking (any) vhost-scsi feature bits
> 
> This is a separate bug, isn't it?  It need not block PI support.
> 

Thanks for the feedback.  I'll get the series updated to use bytes
instead of number of iovecs in virtio_scsi_cmd_req_pi, along with a
simple memcpy_fromiovecend conversion.

--nab


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