linux-kernel - Re: [PATCH] Update documentation to reflect what TAINT_CPU_OUT_OF

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Date:   Tue, 8 Dec 2020 09:58:32 -0800
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Jonathan Corbet <corbet@....net>,
        Mathieu Chouquet-Stringer <me@...hieu.digital>
Cc:     Borislav Petkov <bp@...en8.de>, Stephen Kitt <steve@....org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Kees Cook <keescook@...omium.org>,
        "Guilherme G. Piccoli" <gpiccoli@...onical.com>,
        Eric Biggers <ebiggers@...gle.com>,
        Qais Yousef <qais.yousef@....com>,
        Naoki Hayama <naoki.hayama@...eo.co.jp>,
        Yue Hu <huyue2@...ong.com>, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Update documentation to reflect what
 TAINT_CPU_OUT_OF_SPEC means nowadays

On 12/8/20 9:54 AM, Jonathan Corbet wrote:
> On Wed,  2 Dec 2020 16:32:43 +0100
> Mathieu Chouquet-Stringer <me@...hieu.digital> wrote:
> 
>> 	Hello Jonathan,
>>
>> Here's a patch updating the meaning of TAINT_CPU_OUT_OF_SPEC after
>> Borislav introduced changes in a7e1f67ed29f and upcoming patches in tip.
>>
>> TAINT_CPU_OUT_OF_SPEC now means a bit more what it implies as the
>> flag isn't set just because of a CPU misconfiguration or mismatch.
>> Historically it was for SMP kernel oops on an officially SMP incapable
>> processor but now it also covers CPUs whose MSRs have been incorrectly
>> poked at from userspace, drivers being used on non supported
>> architectures, broken firmware, mismatched CPUs, ...
>>
>> Update documentation and script to reflect that.
>>
>> Signed-off-by: Mathieu Chouquet-Stringer <me@...hieu.digital>
> 
> Hearing no objection, I've applied this.


Hm, I was glad to read this new info since my old testing laptop
now tells me that it needs a microcode update.  :(


-- 
~Randy