On 3/24/21 1:22 PM, Thomas Hellström (Intel) wrote: >> We also have not been careful at *all* about how _PAGE_BIT_SOFTW* are >> used. It's quite possible we can encode another use even in the >> existing bits. >> >> Personally, I'd just try: >> >> #define _PAGE_BIT_SOFTW5 57 /* available for programmer */ >> > OK, I'll follow your advise here. FWIW I grepped for SW1 and it seems > used in a selftest, but only for PTEs AFAICT. > > Oh, and we don't care about 32-bit much anymore? On x86, we have 64-bit PTEs when running 32-bit kernels if PAE is enabled. IOW, we can handle the majority of 32-bit CPUs out there. But, yeah, we don't care about 32-bit. :)
