On Tue, 30 Jun 2020 09:04:38 -0400 "Michael S. Tsirkin" <m...@redhat.com> wrote:
> On Tue, Jun 30, 2020 at 02:25:04PM +0200, Cornelia Huck wrote: > > What bothers me most is that you need to explicitly request a device to > > be modern-only, while that should be the default for any newly added > > device. Hence the approach with the centralized list of device types > > mentioned in a parallel thread. The main problem with that is that the > > proxy device starts getting realized before the virtio device with its > > id is present... I failed to find a solution so far. But I'd really > > like an approach that can work for all transports. > > So how about simply validating that the device is modern only, > unless it's one of the whitelist? Who would do the validation, the virtio core? How can it distinguish between transitional and non-transitional? But maybe I'm just not getting your idea. Also, ccw does not currently have a way to explicitly configure a device non-transitional; the revisions can be used to fence off newer features, going down to legacy-only, but fencing off older features is not possible (that is only done by the device, if it has no legacy support).
