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Date:   Wed, 11 Jul 2018 17:30:44 +0200
From:   Peter Zijlstra <peterz@infradead.org>
To:     Yu-cheng Yu <yu-cheng.yu@intel.com>
Cc:     x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, linux-kernel@vger.kernel.org,
        linux-doc@vger.kernel.org, linux-mm@kvack.org,
        linux-arch@vger.kernel.org, linux-api@vger.kernel.org,
        Arnd Bergmann <arnd@arndb.de>,
        Andy Lutomirski <luto@amacapital.net>,
        Balbir Singh <bsingharora@gmail.com>,
        Cyrill Gorcunov <gorcunov@gmail.com>,
        Dave Hansen <dave.hansen@linux.intel.com>,
        Florian Weimer <fweimer@redhat.com>,
        "H.J. Lu" <hjl.tools@gmail.com>, Jann Horn <jannh@google.com>,
        Jonathan Corbet <corbet@lwn.net>,
        Kees Cook <keescook@chromiun.org>,
        Mike Kravetz <mike.kravetz@oracle.com>,
        Nadav Amit <nadav.amit@gmail.com>,
        Oleg Nesterov <oleg@redhat.com>, Pavel Machek <pavel@ucw.cz>,
        "Ravi V. Shankar" <ravi.v.shankar@intel.com>,
        Vedvyas Shanbhogue <vedvyas.shanbhogue@intel.com>
Subject: Re: [RFC PATCH v2 18/27] x86/cet/shstk: Introduce WRUSS instruction
Message-ID: <20180711153044.GK2476@hirez.programming.kicks-ass.net>
References: <20180710222639.8241-1-yu-cheng.yu@intel.com>
 <20180710222639.8241-19-yu-cheng.yu@intel.com>
 <20180711094448.GZ2476@hirez.programming.kicks-ass.net>
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On Wed, Jul 11, 2018 at 08:06:55AM -0700, Yu-cheng Yu wrote:
> On Wed, 2018-07-11 at 11:44 +0200, Peter Zijlstra wrote:

> > What happened to:
> > 
> > ? https://lkml.kernel.org/r/1528729376.4526.0.camel@2b52.sc.intel.com
> 
> Yes, I put that in once and realized we only need to skip the
> instruction and return err. ?Do you think we still need a handler for
> that?

I find that other form more readable, but then there's Nadav doing asm
macros to shrink inline asm thingies so maybe he has another suggestion.