Re: [Qemu-devel] [PATCH 0/7] virtio endian-ambivalent target fixes.

[Thomas Huth]

On Fri, 14 Feb 2014 10:38:02 +0100
Greg Kurz <address@hidden> wrote:

> On Thu, 17 Oct 2013 14:23:35 +1030
> Rusty Russell <address@hidden> wrote:
> > This is a re-transmit of the core of the virtio endian code.  Since
> > there seems to be some interest in ARM BE virtio, I've separated this from
> > the direct problem I was solving: PowerPC LE.
> > 
> > Please apply!
> > Rusty.
> > 
> 
> Hi,
> 
> This serie is needed to enable current legacy virtio devices in a
> cross-endian environment. Even though virtio-1.0 will address endianess
> questions at the specification level, it is still in its early boot phase
> and no code will be available before long (Rusty, please correct me if I am
> wrong).
> 
> We have all the PPC KVM bits in 3.14 already. We have PPC QEMU patches
> ready to be applied by Alexander, as soon as the common code gets in.
> Anthony has already positively reviewed this serie. We have been testing
> for some monthes... Now we are waiting for partners ! :)
> 
> Are the ARM people still interested in cross-endian virtio ? Are there
> other people interested (Thomas for s390) ?

FYI: s390 is always big-endian, so we currently do not have a problem
yet. However, as soon as the Virtio-1.0 standard materializes, we will
have to swap the ring data on s390, since it is then changed to
little-endian. That's why we are interested in this patch series, too.
So Rusty, if you (or somebody else) could post an updated version of
this patch series, that would be great!

 Regards,
  Thomas