linux-kernel - Re: [RFC PATCH v2 5/6] x86/entry/pti: avoid setting CR3 when it's already correct

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Message-ID: <20180110071624.gllkdls2eo7jfhaf@gmail.com>
Date:   Wed, 10 Jan 2018 08:16:24 +0100
From:   Ingo Molnar <mingo@...nel.org>
To:     Willy Tarreau <w@....eu>
Cc:     linux-kernel@...r.kernel.org, x86@...nel.org,
        Andy Lutomirski <luto@...nel.org>,
        Borislav Petkov <bp@...en8.de>,
        Brian Gerst <brgerst@...il.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>, Kees Cook <keescook@...omium.org>
Subject: Re: [RFC PATCH v2 5/6] x86/entry/pti: avoid setting CR3 when it's
 already correct


* Willy Tarreau <w@....eu> wrote:

> +	/* if we're already on the kernel PGD, we don't switch */
> +	 * If we're already on the kernel PGD, we don't switch,
> +	 * If we saved a kernel context on entry, we didn't switch the CR3,

It's hard enough to read assembly code, please use consistent capitalization:

s/if
 /If

Thanks,

	Ingo