linux-kernel - Re: [PATCH v8 04/12] x86/spectre: Add boot time option to select Spectre v2 mitigation

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Message-ID: <20180124095803.fcnq3g4b5xtebdtr@pd.tnic>
Date:   Wed, 24 Jan 2018 10:58:03 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     Kees Cook <keescook@...gle.com>
Cc:     Jiri Kosina <jikos@...nel.org>,
        David Woodhouse <dwmw@...zon.co.uk>,
        Andi Kleen <ak@...ux.intel.com>, Paul Turner <pjt@...gle.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Greg Kroah-Hartman <gregkh@...ux-foundation.org>,
        Tim Chen <tim.c.chen@...ux.intel.com>,
        Dave Hansen <dave.hansen@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Rik van Riel <riel@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Andy Lutomirski <luto@...capital.net>,
        Alan Cox <gnomes@...rguk.ukuu.org.uk>, X86 ML <x86@...nel.org>,
        Tom Lendacky <thomas.lendacky@....com>,
        Josh Poimboeuf <jpoimboe@...hat.com>
Subject: Re: [PATCH v8 04/12] x86/spectre: Add boot time option to select
 Spectre v2 mitigation

On Wed, Jan 24, 2018 at 11:32:00AM +1100, Kees Cook wrote:
> I've wanted this for a while (especially for the coming detected
> support for stack protector). Having more than just the clfags is, I
> think, important. We'd likely want to record the entire environment
> (compiler version, linker version, flags on both, etc).

... which makes me think of /proc/config.gz

Can we do something like that here too?

-- 
Regards/Gruss,
    Boris.

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