I may have been a bit misleading here. What we really want to do is use the same matching algorithm as is used by the rest of the device state. Currently this is a vmstate name and [arbitrary] numeric id. I don't remember whether there's a convenient link from a device to its associated vmstate - if there isn't there probably should be.
DeviceState->info->vmsd->name for the name. Dunno about the numeric id, I think savevm.c doesn't export it. cheers, Gerd
