From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id S1753427Ab3KDPtr (ORCPT <rfc822;w@1wt.eu>);
	Mon, 4 Nov 2013 10:49:47 -0500
Received: from smtp.citrix.com ([66.165.176.89]:35138 "EHLO SMTP.CITRIX.COM"
	rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
	id S1753334Ab3KDPtq (ORCPT <rfc822;linux-kernel@vger.kernel.org>);
	Mon, 4 Nov 2013 10:49:46 -0500
X-IronPort-AV: E=Sophos;i="4.93,633,1378857600"; 
   d="scan'208";a="70346525"
Message-ID: <1383580147.8826.104.camel@kazak.uk.xensource.com>
Subject: Re: [Xen-devel] [PATCH v3] p2m: use GNTTABOP_unmap_and_duplicate if
 available
From: Ian Campbell <Ian.Campbell@citrix.com>
To: Roger Pau Monne <roger.pau@citrix.com>
CC: <xen-devel@lists.xen.org>, <linux-kernel@vger.kernel.org>,
        "Stefano Stabellini" <stefano.stabellini@eu.citrix.com>,
        David Vrabel <david.vrabel@citrix.com>
Date: Mon, 4 Nov 2013 15:49:07 +0000
In-Reply-To: <1383579524-12465-1-git-send-email-roger.pau@citrix.com>
References: <1383579524-12465-1-git-send-email-roger.pau@citrix.com>
Organization: Citrix Systems, Inc.
Content-Type: text/plain; charset="UTF-8"
X-Mailer: Evolution 3.4.4-3 
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
X-Originating-IP: [10.30.203.1]
X-DLP: MIA2
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On Mon, 2013-11-04 at 16:38 +0100, Roger Pau Monne wrote:
> The new GNTTABOP_unmap_and_duplicate operation 

I don't see this op in mainline Xen anywhere...

Was it part of Stefano's original swiotlb for ARM stuff? If so we've
dropped that approach for ARM and the new solution doesn't require
hypervisor changes so the upstreaming of this hypercall ended, so you'd
have to pick it up and complete that work if you want to use it.

Ian.