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Subject: Re: [PATCH] Update documentation to reflect what
 TAINT_CPU_OUT_OF_SPEC means nowadays
To:     Jonathan Corbet <corbet@lwn.net>,
        Mathieu Chouquet-Stringer <me@mathieu.digital>
Cc:     Borislav Petkov <bp@alien8.de>, Stephen Kitt <steve@sk2.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Kees Cook <keescook@chromium.org>,
        "Guilherme G. Piccoli" <gpiccoli@canonical.com>,
        Eric Biggers <ebiggers@google.com>,
        Qais Yousef <qais.yousef@arm.com>,
        Naoki Hayama <naoki.hayama@lineo.co.jp>,
        Yue Hu <huyue2@yulong.com>, linux-doc@vger.kernel.org,
        linux-kernel@vger.kernel.org
References: <20201202153244.709752-1-me@mathieu.digital>
 <20201208105439.23e2349b@lwn.net>
From:   Randy Dunlap <rdunlap@infradead.org>
Message-ID: <1254edd7-25ee-b73d-da2c-194d38ba7890@infradead.org>
Date:   Tue, 8 Dec 2020 09:58:32 -0800
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On 12/8/20 9:54 AM, Jonathan Corbet wrote:
> On Wed,  2 Dec 2020 16:32:43 +0100
> Mathieu Chouquet-Stringer <me@mathieu.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@mathieu.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