On 2/15/22 09:53, Gerd Hoffmann wrote: > What is missing: > > * Some way for the firmware to get a phys-bits value it can actually > use. One possible way would be to have a paravirtual bit somewhere > telling whenever host-phys-bits is enabled or not. > If we are not talking about *very old* processors... isn't what already advertised in CPUID.80000008 EAX enough? That's the maxphysaddr width on x86, which on qemu we do set it with the phys-bits value;
Joao
