linux-kernel - Re: [RFC PATCH v2] tools/x86: add kcpuid tool to show raw CPU features

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Message-ID: <20200925172738.GN16872@zn.tnic>
Date:   Fri, 25 Sep 2020 19:27:38 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Dave Hansen <dave.hansen@...el.com>
Cc:     Feng Tang <feng.tang@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H . Peter Anvin" <hpa@...or.com>,
        Peter Zijlstra <peterz@...radead.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH v2] tools/x86: add kcpuid tool to show raw CPU
 features

On Tue, Sep 22, 2020 at 12:38:30PM -0700, Dave Hansen wrote:
> or something.  It also needs a "-f" argument to override this default
> location.

Yah, the -f thing is almost mandatory. I can imagine simply downloading
the latest cpuid.leafs or so and then running kcpuid on it. Can't get
any better than this I'd say.

Which reminds me: we probably should aim at not changing that text
file's format too often and design it to contain the required info
from the get-go so that we don't have uglies with old kcpuid not
understanding the new format or the other way around. That would be a
pain.

-- 
Regards/Gruss,
    Boris.

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