From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andrew Cooper <andrew.cooper3@citrix.com>
Subject: Re: Discussion about virtual iommu support for Xen guest
Date: Thu, 2 Jun 2016 19:58:48 +0100
Message-ID: <575081E8.6070609@citrix.com>
References: <5746B3FA.6020401@intel.com> <5746DF93.8090803@citrix.com>
 <57480327.60609@intel.com> <78d122f0-c773-7fa3-1258-c551937c508e@intel.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Return-path: <xen-devel-bounces@lists.xen.org>
In-Reply-To: <78d122f0-c773-7fa3-1258-c551937c508e@intel.com>
List-Unsubscribe: <http://lists.xen.org/cgi-bin/mailman/options/xen-devel>,
 <mailto:xen-devel-request@lists.xen.org?subject=unsubscribe>
List-Post: <mailto:xen-devel@lists.xen.org>
List-Help: <mailto:xen-devel-request@lists.xen.org?subject=help>
List-Subscribe: <http://lists.xen.org/cgi-bin/mailman/listinfo/xen-devel>,
 <mailto:xen-devel-request@lists.xen.org?subject=subscribe>
Errors-To: xen-devel-bounces@lists.xen.org
Sender: "Xen-devel" <xen-devel-bounces@lists.xen.org>
To: "Lan, Tianyu" <tianyu.lan@intel.com>, jbeulich@suse.com, sstabellini@kernel.org, ian.jackson@eu.citrix.com, xen-devel@lists.xensource.com, kevin.tian@intel.com, "Dong, Eddie" <eddie.dong@intel.com>, "Nakajima, Jun" <jun.nakajima@intel.com>, yang.zhang.wz@gmail.com, anthony.perard@citrix.com, Roger Pau Monne <roger.pau@citrix.com>
List-Id: xen-devel@lists.xenproject.org
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