Il 16/07/2013 20:11, Eduardo Habkost ha scritto:
> For physical bit size, what about extending it in a backwards-compatible
> way? Something like this:
>
> *eax = 0x0003000; /* 48 bits virtual */
> if (ram_size < 1TB) {
> physical_size = 40; /* Keeping backwards compatibility */
> } else if (ram_size < 4TB) {
> physical_size = 42;
Why not go straight up to 44?
> } else {
> abort();
> }
> if (supported_host_physical_size() < physical_size) {
> abort();
> }
> *eax |= physical_size;
>
> (Of course, the abort() calls should be replaced with proper error
> reporting)
This makes sense too. Though the best would be of course to use CPUID
values coming from the real processors, and only using 40 for backwards
compatibility.
Paolo
