linux-kernel - Re: A question about prefetchw detection in "x86/asm: Cleanup prefetch primitives"

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Message-ID: <20230621130955.GHZJL2o771lIEPURUl@fat_crate.local>
Date:   Wed, 21 Jun 2023 15:09:55 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Xi Ruoyao <xry111@...111.site>
Cc:     x86@...nel.org, linux-kernel@...r.kernel.org,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: A question about prefetchw detection in "x86/asm: Cleanup
 prefetch primitives"

On Wed, Jun 21, 2023 at 09:06:51PM +0800, Xi Ruoyao wrote:
> I think it's not an issue in the kernel itself, but announcing
> 3dnowprefetch in /proc/cpuinfo for an old Intel CPU w/o real prefetchw
> implementation seems problematic (to me).

And this is a problem because?

Think practically.

-- 
Regards/Gruss,
    Boris.

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