Subject: Re: [PATCH V2 00/13] powerpc/vas: Page fault handling for user space NX requests

From: Segher Boessenkool <[email-masked]>
Date: Mon, 9 Dec 2019 02:38:06 -0600

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