On 22/09/2016 11:19, Markus Armbruster wrote: >> > I think -device is okay for something that isn't a "backend" but is >> > directly guest-visible. > Well, the contents of a block device is just as guest-visible. We split > the device in a frontend and a backend, and the contents comes from the > backend. > > We traditionally don't model memory as a split device. Perhaps we > should. Regardless of whether we actually do, "contents of a memory > device that you need to create by some other means (explicit or > implicit)" feels much more like -object than like -device to me.
The closest precedents here are "-bios" (not an object at all), PCI ROMs (a property points to the file), and "-pflash" (split into backend and frontend, the frontend being a device). I think there is a device concept in here, the question is whether you want to split the backend and frontend. For read-only data the precedents favor not splitting it. Paolo
