linux-kernel - Re: [PATCH 2/4] Revert "x86/boot: Fail the boot if !M486 and CPUID is missing"

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Message-ID: <20161201055350.GH3092@twins.programming.kicks-ass.net>
Date:   Thu, 1 Dec 2016 06:53:50 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Andy Lutomirski <luto@...nel.org>
Cc:     x86@...nel.org, One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>,
        Borislav Petkov <bp@...en8.de>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Brian Gerst <brgerst@...il.com>,
        Matthew Whitehead <tedheadster@...il.com>,
        Henrique de Moraes Holschuh <hmh@....eng.br>,
        Denys Vlasenko <dvlasenk@...hat.com>,
        "H . Peter Anvin" <hpa@...or.com>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH 2/4] Revert "x86/boot: Fail the boot if !M486 and CPUID
 is missing"

On Wed, Nov 30, 2016 at 12:34:53PM -0800, Andy Lutomirski wrote:
> This reverts commit ed68d7e9b9cfb64f3045ffbcb108df03c09a0f98.
> 
> The patch wasn't quite correct -- there are non-Intel (and hence
> non-486) CPUs that we support that don't have CPUID.  Since we no
> longer require CPUID for sync_core(), just revert the patch.

Might be useful to enumerate which special parts these are.