Re: [PATCH] x86: also disable FSRM if ERMS is disabled

[Jiri Slaby]

On 04. 01. 23, 12:39, Borislav Petkov wrote:
> On Wed, Jan 04, 2023 at 08:43:51AM +0100, Jiri Slaby wrote:
> > Let me resurrect this thread... Our customer has an AMD CPU which has indeed
> > both capabilities under normal circumstances. But they have a cool UEFI BIOS
> > too. They say:
> >
> > """
> > In AMD platform, while disalbe ERMS(Enhanced Rep MOVSB/STOSB) in UEFI
> > (system setup -> processor -> Enhanced Rep MOVSB/STOSB), the OS can't boot
> > normally.
>
> Any particular reason they're disabling ERMS?

Just so you know (I see you progressed with Ingo to fix this) -- despite 
I asked the very same question, I received no answer quite yet. I 
suppose it will sound like usual "because we can".

> What do they set FSRM to?

I suppose they keep it "enabled".

thanks,
--
js
suse labs