linux-kernel - Re: Candidate Linux ABI for Intel AMX and hypothetical new related features

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Message-ID: <87wnqkzklg.fsf@oldenburg.str.redhat.com>
Date:   Wed, 23 Jun 2021 17:06:35 +0200
From:   Florian Weimer <fweimer@...hat.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Dave Hansen via Libc-alpha <libc-alpha@...rceware.org>,
        Len Brown <lenb@...nel.org>,
        Dave Hansen <dave.hansen@...el.com>,
        Rich Felker <dalias@...c.org>,
        Linux API <linux-api@...r.kernel.org>,
        "Bae, Chang Seok" <chang.seok.bae@...el.com>,
        X86 ML <x86@...nel.org>, LKML <linux-kernel@...r.kernel.org>,
        Kyle Huey <me@...ehuey.com>, Borislav Petkov <bp@...en8.de>,
        Andy Lutomirski <luto@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Keno Fischer <keno@...iacomputing.com>,
        Arjan van de Ven <arjan@...ux.intel.com>,
        Willy Tarreau <w@....eu>
Subject: Re: Candidate Linux ABI for Intel AMX and hypothetical new related
 features

* Peter Zijlstra:

> On Fri, May 21, 2021 at 04:44:58PM +0200, Florian Weimer wrote:
>
>> And we added an interface for querying x86 CPU features to glibc 2.33
>> which is completely incompatible with this because it assumes that CPU
>> features do not change during the lifetime of a process. 8-(
>
> How many x86 kernel maintainers signed off on that patch?

I've started a new thread:

  x86 CPU features detection for applications (and AMX)
  <https://lore.kernel.org/linux-api/87tulo39ms.fsf@oldenburg.str.redhat.com/>

Thanks,
Florian