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

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Message-ID: <20190801095928.GA32138@nazgul.tnic>
Date:   Thu, 1 Aug 2019 12:03:41 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     "Kirill A. Shutemov" <kirill@...temov.name>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
        "Luck, Tony" <tony.luck@...el.com>,
        "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 Wed, Jul 31, 2019 at 02:05:54AM +0300, Kirill A. Shutemov wrote:
> Add support for a new instruction MOVDIR64B. The instruction moves
> 64-bytes as direct-store with 64-byte write atomicity from source memory
> address to destination memory address.
> 
> MOVDIR64B requires the destination address to be 64-byte aligned. No
> alignment restriction is enforced for source operand.
> 
> See Intel Software Developer’s Manual for more information on the
> instruction.
> 
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
> ---
> 
> Several upcoming patchsets will make use of the helper.

... so why aren't you sending it together with its first user?

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
--