linux-kernel - Re: [PATCH 00/29] x86: Kernel IBT

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Message-ID: <Yhe2qN6kHL7FHicY@kernel.org>
Date:   Thu, 24 Feb 2022 18:47:36 +0200
From:   Mike Rapoport <rppt@...nel.org>
To:     Kees Cook <keescook@...omium.org>
Cc:     "Edgecombe, Rick P" <rick.p.edgecombe@...el.com>,
        "Poimboe, Josh" <jpoimboe@...hat.com>,
        "peterz@...radead.org" <peterz@...radead.org>,
        "hjl.tools@...il.com" <hjl.tools@...il.com>,
        "x86@...nel.org" <x86@...nel.org>,
        "joao@...rdrivepizza.com" <joao@...rdrivepizza.com>,
        "Cooper, Andrew" <andrew.cooper3@...rix.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "samitolvanen@...gle.com" <samitolvanen@...gle.com>,
        "ndesaulniers@...gle.com" <ndesaulniers@...gle.com>,
        "Milburn, Alyssa" <alyssa.milburn@...el.com>
Subject: Re: [PATCH 00/29] x86: Kernel IBT

On Tue, Feb 22, 2022 at 11:26:57PM -0800, Kees Cook wrote:
> 
> On Fri, 2022-02-18 at 17:49 +0100, Peter Zijlstra wrote:
> > This is an (almost!) complete Kernel IBT implementation. 
> 
> BTW, I've successfully tested this on what /proc/cpuinfo calls an "11th
> Gen Intel(R) Core(TM) i7-1165G7 @ 2.80GHz" (in a Lenovo "Yoga 7 15ITL5").
> Normal laptop-y things all seem happy and it correctly blows up on a new
> LKDTM test I'll send out tomorrow.

For me it boots and can build kernel on a desktop with "12th Gen Intel(R)
Core(TM) i9-12900K"
 
> So, even though the series is young and has some TODOs still:
> 
> Tested-by: Kees Cook <keescook@...omium.org>

So, FWIW:

Tested-by: Mike Rapoport <rppt@...ux.ibm.com>

> One thought: should there be a note in dmesg about it being active? The
> only way to see it is finding "ibt" in cpuinfo...
> 
> -Kees
> 
> -- 
> Kees Cook

-- 
Sincerely yours,
Mike.