Hi Philippe, Sorry for the delay; I was away for a few weeks visiting family.
On Mon, Jul 01, 2019 at 08:06:21PM +0200, Philippe Mathieu-Daudé wrote: > The difference with the previous content is now we have > two new holes: > > - 0x02000000-0x10000000 > - 0x14001000-0x1c000000 > > Ralf/Paul/James, what should happen when a guest access these > holes (hardware PoV, no QEMU)? I don't have a Malta handy to check (they're mostly "retired" these days & the vast majority of surviving ones use newer FPGA daughtercards with the MSC01-style system controller anyway), but I believe writes just get dropped & reads return zero. At least that's the way I recall most accesses to unused address ranges working on Malta. (Which is really annoying sometimes, and the newer Boston system gives you a bus error in the equivalent scenario.) Thanks, Paul