[Skiboot] NX crypto on POWER9

[Haren Myneni]

Klaus,

NX crypto is not enabled and supported on P9 due to performance issues.
Instead use SW instructions.

George Wilson can give more information.

Thanks
haren

"Klaus Heinrich Kiwi" <klaus at linux.vnet.ibm.com> wrote on 03/08/2021
05:05:31 AM:

> From: "Klaus Heinrich Kiwi" <klaus at linux.vnet.ibm.com>
> To: skiboot at lists.ozlabs.org, Haren Myneni/Beaverton/IBM at IBM
> Date: 03/08/2021 05:05 AM
> Subject: Re: [Skiboot] NX crypto on POWER9
>
> Haren,
>
>   do you have any insights here? Is there any public documentation
> that can be used?
>
> Thanks,
>
>   -Klaus
>
> On 3/5/2021 3:46 AM, Stewart Smith wrote:
> > On Thu, Mar 4, 2021, at 6:14 PM, Léo Le Bouter wrote:
> >> Following https://github.com/open-power/hostboot/issues/196
> >>
> >> Bdragon on #talos-workstation found out that they are not enabled in
> >> skiboot here:
> >> https://github.com/open-power/skiboot/blob/master/hw/nx-crypto.c#L269
> >>
> >>  From their investigations it looks like the engines are working in
> >> hardware just not fully configured and wired up in software.
> >>
> >> How could we get them enabled?
> >>
> >> Next step then would be to wire it up in the Linux kernel so dm-crypt
> >> can then use it.
> >
> > Likely needs hardware documentation on that part of the NX unit,
> so that any configuration needing to happen in skiboot can be done,
> and any configuration needed can be passed onto the kernel.
> >
> > I'm not sure if this documentation is public though.
> > _______________________________________________
> > Skiboot mailing list
> > Skiboot at lists.ozlabs.org
> > https://lists.ozlabs.org/listinfo/skiboot
> >
>
> --
> Klaus Heinrich Kiwi <klaus at linux.vnet.ibm.com>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.ozlabs.org/pipermail/skiboot/attachments/20210308/0b9bc551/attachment.htm>