linux-kernel - Re: [RFC][PATCH 06/17] x86/cpu: Add SRSO untrain to retbleed=

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Message-ID: <20230812121213.GEZNd3HQxbYI42mDtr@fat_crate.local>
Date:   Sat, 12 Aug 2023 14:12:13 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Josh Poimboeuf <jpoimboe@...nel.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org, David.Kaplan@....com,
        Andrew.Cooper3@...rix.com, gregkh@...uxfoundation.org
Subject: Re: [RFC][PATCH 06/17] x86/cpu: Add SRSO untrain to retbleed=

On Sat, Aug 12, 2023 at 01:32:56PM +0200, Peter Zijlstra wrote:
> So I really hate that .Kconfig explosion, that's the very last thing we
> need :-( More random options that can cause build time trouble.
> 
> I might see value in one knob that kills all speculation nonsense at
> build time, but not one per mitigation, that's maddness.

Yap, I hate them too. Linus wanted them last time and you added them.

And now we have a subset of mitigations with Kconfig options and
a subset without.

;-\

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette