[PATCH V2 00/13] powerpc/vas: Page fault handling for user space NX requests
On power9, Virtual Accelerator Switchboard (VAS) allows user space or
kernel to communicate with Nest Accelerator (NX) directly using COPY/PASTE
instructions. NX provides verious functionalities such as compression
On Mon, 2019-12-09 at 02:38 -0600, Segher Boessenkool wrote:
> 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.
Thanks, NX (Nes
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
Hi,
What do you mean by NX ?
Up to now, NX has been standing for No-eXecute. That's a bit in segment
registers on book3s/32 to forbid executing code.
Therefore, some of your text is really misleading. If NX means something
else for you, your text must be unambiguous.
Christophe
Le 09/12/20
Applications will send compression / decompression requests to NX with
COPY/PASTE instructions. When NX is processing these requests, can hit
fault on the request buffer (not in memory). It issues an interrupt and
pastes fault CRB in fault FIFO. Expects kernel to handle this fault and
return cred
