On Tue, Aug 07, 2018 at 05:52:12AM +1000, Benjamin Herrenschmidt wrote: > > It is your job to write a coherent interface specification that does > > not depend on the used components. The hypervisor might be PAPR, > > Linux + qemu, VMware, Hyperv or something so secret that you'd have > > to shoot me if you had to tell me. The guest might be Linux, FreeBSD, > > AIX, OS400 or a Hipster project of the day in Rust. As long as we > > properly specify the interface it simplify does not matter. > > That's the point Christoph. The interface is today's interface. It does > NOT change. That information is not part of the interface. > > It's the VM itself that is stashing away its memory in a secret place, > and thus needs to do bounce buffering. There is no change to the virtio > interface per-se.
Any guest that doesn't know about your magic limited adressing is simply not going to work, so we need to communicate that fact.
