Hi! On Mon, Dec 09, 2019 at 06:37:09AM +0100, Christophe Leroy wrote: > What do you mean by NX ? It is the Power9 "Nest Accelerator". The patch series should ideally mention that right at the start, yeah. > Up to now, NX has been standing for No-eXecute. That's a bit in segment > registers on book3s/32 to forbid executing code. That bit is called just N fwiw (and not really specific to 32-bit -- on 64-bit implementations it was part of segment table entries, and of SLB entries on newer machines). Segher