> Keep in mind, this has to be a stable string across versions of qemu > since this is savevm/migration. Are we absolutely confident that the > full qdev path isn't going to change? I'm more confident that a unique > device name is going to be static across qemu versions.
The actual representation of the device address is a secondary issue. The important point is that ram blocks should be associated with devices[*], and matched in exactly the same way. Devices should not be duplicating this on an ad-hoc basis. Paul [*] Ignore that we don't currently have a root system device node. A null device will suffice for now.
