linux-kernel - Re: [RFC PATCH v2 27/27] x86/cet: Add arch

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Message-ID: <1531342956.15351.38.camel@intel.com>
Date:   Wed, 11 Jul 2018 14:02:36 -0700
From:   Yu-cheng Yu <yu-cheng.yu@...el.com>
To:     Florian Weimer <fweimer@...hat.com>, x86@...nel.org,
        "H. Peter Anvin" <hpa@...or.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-mm@...ck.org,
        linux-arch@...r.kernel.org, linux-api@...r.kernel.org,
        Arnd Bergmann <arnd@...db.de>,
        Andy Lutomirski <luto@...capital.net>,
        Balbir Singh <bsingharora@...il.com>,
        Cyrill Gorcunov <gorcunov@...il.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        "H.J. Lu" <hjl.tools@...il.com>, Jann Horn <jannh@...gle.com>,
        Jonathan Corbet <corbet@....net>,
        Kees Cook <keescook@...omiun.org>,
        Mike Kravetz <mike.kravetz@...cle.com>,
        Nadav Amit <nadav.amit@...il.com>,
        Oleg Nesterov <oleg@...hat.com>, Pavel Machek <pavel@....cz>,
        Peter Zijlstra <peterz@...radead.org>,
        "Ravi V. Shankar" <ravi.v.shankar@...el.com>,
        Vedvyas Shanbhogue <vedvyas.shanbhogue@...el.com>
Subject: Re: [RFC PATCH v2 27/27] x86/cet: Add arch_prctl functions for CET

On Wed, 2018-07-11 at 14:19 +0200, Florian Weimer wrote:
> On 07/11/2018 12:26 AM, Yu-cheng Yu wrote:
> > 
> > arch_prctl(ARCH_CET_DISABLE, unsigned long features)
> >      Disable SHSTK and/or IBT specified in 'features'.  Return
> > -EPERM
> >      if CET is locked out.
> > 
> > arch_prctl(ARCH_CET_LOCK)
> >      Lock out CET feature.
> Isn't it a “lock in” rather than a “lock out”?

Yes, that makes more sense.  I will fix it.