Re: [PATCH v3 00/41] linux: towards virtio-1 guest support

["Michael S. Tsirkin" <mst@redhat.com>]

On Mon, Nov 24, 2014 at 07:48:31PM +0100, Cornelia Huck wrote:
> On Mon, 24 Nov 2014 13:52:32 +0200
> "Michael S. Tsirkin" <mst@redhat.com> wrote:
> 
> > Based on patches by Cornelia Rusty and others, but
> > with an API that should allow better static checking of code,
> > and slightly more concervative changes in vring,net and blk.
> > 
> > Based on patches by Cornelia and others, but
> > with an API that should allow better static checking of code,
> > slightly more concervative changes in vring and drivers,
> > and compatibility for existing drivers so that
> > this series be applied before all drivers are converted.
> > 
> > virtio net,blk and scsi drivers have been converted.
> > They now pass sparse without warnings.
> > 
> > net and blk patches have been tested on s390.
> 
> vring_transport_features() seems to knock off the version 1 bit (I
> wonder why I did not see that before, maybe VIRTIO_TRANSPORT_F_END had
> not been increased before?). If I add VIRTIO_F_VERSION_1 in this
> function, virtio-net and virtio-blk seem to work fine with version 1 on
> virtio-ccw (tested with my old virtio-1 qemu branch).

What if we just move VIRTIO_TRANSPORT_F_END back for now?
Does patch below fix it for you?

> I'll try to do a bit of reviewing tomorrow.

BTW could you post your latest qemu bits please?



diff --git a/include/uapi/linux/virtio_config.h b/include/uapi/linux/virtio_config.h
index a6d0cde..0071de9 100644
--- a/include/uapi/linux/virtio_config.h
+++ b/include/uapi/linux/virtio_config.h
@@ -47,7 +47,7 @@
  * transport being used (eg. virtio_ring), the rest are per-device feature
  * bits. */
 #define VIRTIO_TRANSPORT_F_START	28
-#define VIRTIO_TRANSPORT_F_END		33
+#define VIRTIO_TRANSPORT_F_END		32
 
 /* Do we get callbacks when the ring is completely used, even if we've
  * suppressed them? */
-- 
MST