linux-kernel - Re: [PATCH] x86/asm: Add support for MOVDIR64B instruction

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Message-ID: <20190801192030.GA11781@agluck-desk2.amr.corp.intel.com>
Date:   Thu, 1 Aug 2019 12:20:30 -0700
From:   "Luck, Tony" <tony.luck@...el.com>
To:     Borislav Petkov <bp@...en8.de>
Cc:     "Kirill A. Shutemov" <kirill@...temov.name>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
        "Lin, Jing" <jing.lin@...el.com>,
        "Kumar, Sanjay K" <sanjay.k.kumar@...el.com>,
        linux-kernel@...r.kernel.org,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Subject: Re: [PATCH] x86/asm: Add support for MOVDIR64B instruction

On Thu, Aug 01, 2019 at 12:03:41PM +0200, Borislav Petkov wrote:
> On Wed, Jul 31, 2019 at 02:05:54AM +0300, Kirill A. Shutemov wrote:
> > Several upcoming patchsets will make use of the helper.
> 
> ... so why aren't you sending it together with its first user?

Just to get another of the non-controversial bits out of the
way before the main course arrives.

Note that the CPUFEATURE bit for MOVDIR64B already went upstream
in v4.20:

 ace6485a0326 ("x86/cpufeatures: Enumerate MOVDIR64B instruction")

-Tony