linux-kernel - Re: [GIT PULL] x86/mm changes for v4.14: PCID support, 5-level paging support, Secure Memory Encryption support

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Message-ID: <20170905214438.3pznwbpssqztaod7@pd.tnic>
Date:   Tue, 5 Sep 2017 23:44:38 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Andy Lutomirski <luto@...capital.net>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Ingo Molnar <mingo@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Andy Lutomirski <luto@...nel.org>
Subject: Re: [GIT PULL] x86/mm changes for v4.14: PCID support, 5-level
 paging support, Secure Memory Encryption support

On Tue, Sep 05, 2017 at 02:37:41PM -0700, Andy Lutomirski wrote:
> I can also imagine SME's very clever CR3 masking causing a problem.

So that mask should be 0 on an !SME system. One of the main goals of the
SME code was to have no effect when SME is disabled/not available.

-- 
Regards/Gruss,
    Boris.

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