[Qemu-devel] Re: [PATCHv4 2/2] virtio: add features as qdev properties

[Gerd Hoffmann]

On 12/24/09 13:44, Michael S. Tsirkin wrote:
> Add feature bits as properties to virtio. This makes it possible to e.g. define
> machine without indirect buffer support, which is required for 0.10
> compatibility, or without hardware checksum support, which is required for 0.11
> compatibility.  Since default values for optional features are now set by qdev,
> get_features callback has been modified: it sets non-optional bits, and clears
> bits not supported by host.

I guess you'll need a bunch of entries for pc-0.10 and pc-0.11 to switch 
the virtio devices into the correct compatibility modes?  Should 
probably go as patch #3 of this series.

cheers,
  Gerd