On 3/24/21 3:05 AM, Thomas Hellström (Intel) wrote: > Yes, I agree. Seems like the special (SW1) is available also for huge > page table entries on x86 AFAICT, although just not implemented. > Otherwise the SW bits appear completely used up.
Although the _PAGE_BIT_SOFTW* bits are used up, there's plenty of room in the hardware PTEs. Bits 52->58 are software-available, and we're only using 58 at the moment. 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 */ _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel
