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

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Message-ID: <CAJvTdKmu-eWjSkBMgVh3BE6M38LPTSPk1oER2PKRQFUgqWYV6g@mail.gmail.com>
Date:   Mon, 12 Apr 2021 21:25:21 -0400
From:   Len Brown <lenb@...nel.org>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     Andy Lutomirski <luto@...nel.org>,
        Florian Weimer <fweimer@...hat.com>,
        "Bae, Chang Seok" <chang.seok.bae@...el.com>,
        Dave Hansen <dave.hansen@...el.com>, X86 ML <x86@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>, linux-abi@...r.kernel.org,
        "libc-alpha@...rceware.org" <libc-alpha@...rceware.org>,
        Rich Felker <dalias@...c.org>, Kyle Huey <me@...ehuey.com>,
        Keno Fischer <keno@...iacomputing.com>
Subject: Re: Candidate Linux ABI for Intel AMX and hypothetical new related features

On Mon, Apr 12, 2021 at 8:17 PM Thomas Gleixner <tglx@...utronix.de> wrote:

> I'm fine with that as long the kernel has a way to detect that and can
> kill the offending application/library combo with an excplicit
> -SIG_NICE_TRY.

Agreed.  The new run-time check for altsigstack overflow is one place
we can do that.
Let me know if you think of others,

thanks,
Len Brown,
Intel Open Source Technology Center