linux-kernel - Re: [patch V2 04/28] x86/speculation: Reorganize cpu_show

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Message-ID: <20181126150817.GD4843@zn.tnic>
Date:   Mon, 26 Nov 2018 16:08:17 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     LKML <linux-kernel@...r.kernel.org>, x86@...nel.org,
        Peter Zijlstra <peterz@...radead.org>,
        Andy Lutomirski <luto@...nel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Jiri Kosina <jkosina@...e.cz>,
        Tom Lendacky <thomas.lendacky@....com>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Andrea Arcangeli <aarcange@...hat.com>,
        David Woodhouse <dwmw@...zon.co.uk>,
        Tim Chen <tim.c.chen@...ux.intel.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Dave Hansen <dave.hansen@...el.com>,
        Casey Schaufler <casey.schaufler@...el.com>,
        Asit Mallick <asit.k.mallick@...el.com>,
        Arjan van de Ven <arjan@...ux.intel.com>,
        Jon Masters <jcm@...hat.com>,
        Waiman Long <longman9394@...il.com>,
        Greg KH <gregkh@...uxfoundation.org>,
        Dave Stewart <david.c.stewart@...el.com>,
        Kees Cook <keescook@...omium.org>
Subject: Re: [patch V2 04/28] x86/speculation: Reorganize cpu_show_common()

On Sun, Nov 25, 2018 at 07:33:32PM +0100, Thomas Gleixner wrote:
> The Spectre V2 printout in cpu_show_common() handles conditionals for the
> various mitigation methods directly in the sprintf() argument list. That's
> hard to read and will become unreadable if more complex decisions need to
> be made for a particular method.
> 
> Move the conditionals for STIBP and IBPB string selection into helper
> functions, so they can be extended later on.
> 
> Signed-off-by: Tim Chen <tim.c.chen@...ux.intel.com>
> Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
> 
> ---
>  arch/x86/kernel/cpu/bugs.c |   20 ++++++++++++++++++--
>  1 file changed, 18 insertions(+), 2 deletions(-)

Just a nitpick:

That subject should probably be more like:

"x86/speculation: Move cpu_show_common() string generation in separate functions"

or so, as it is not really reorganizing - just carving out functionality.

-- 
Regards/Gruss,
    Boris.

Good mailing practices for 400: avoid top-posting and trim the reply.