Re: [Qemu-devel] [PATCH 11/15] virtio-scsi: Add virtio-scsi stub device

[Paolo Bonzini]

On 02/10/2012 01:41 PM, Stefan Hajnoczi wrote:
> At this early stage we still have the option of designing the device
> to be little- or big-endian.  I'm in favour of a fixed endianness even
> though existing virtio devices tend to use guest-endian.
>
> What do you think?

Interesting idea, but I'd say no for three reasons:

1) The virtqueue would remain in guest-endianness.

2) Even if the result is better, it is still different from every other 
device, so right now it would be a one-off exception (and it would 
likely remain so; it's not like there are new virtio devices every week :)).

3) I'm afraid of breaking something else, for example pSeries virtio is 
doing complicated things that I don't really understand to split the I/O 
BAR in two parts, the first in PCI endianness and the second in native 
endianness.

Paolo