Messages in this thread | | | Date | Tue, 4 May 2021 09:30:05 +0100 | From | Will Deacon <> | Subject | Re: [RFC 1/2] vfio/pci: keep the prefetchable attribute of a BAR region in VMA |
| |
On Mon, May 03, 2021 at 10:03:59PM +0000, Vikram Sethi wrote: > Will/Catalin, perhaps you could explain your thought process on why you chose > Normal NC for ioremap_wc on the armv8 linux port instead of Device GRE or other > Device Gxx.
I think a combination of: compatibility with 32-bit Arm, the need to support unaligned accesses and the potential for higher performance.
Furthermore, ioremap() already gives you a Device memory type, and we're tight on MAIR space.
Will
| |