Re: [PATCH v2 1/2] x86/speculation: Allow enabling STIBP with legacy IBRS

Borislav Petkov
2023-02-22T12:32:46Z

On Tue, Feb 21, 2023 at 09:49:57PM -0800, KP Singh wrote:
> That is a bit more complicated as, for now, the user is not really
> exposed to STIBP explicitly yet.

Remember that we're exposing the normal user to a gazillion switches
already. And not every user has done a PhD in hw vulns like we were
forced to in the last, at least 5, years.

So whatever you do, you should try to make it work automatic - if
possible - and DTRT - i.e., sane defaults.

Every new functionality added to that madness needs a proper
justification.

Thx.

--
Regards/Gruss,
Boris.