From mboxrd@z Thu Jan  1 00:00:00 1970
From: Chao Gao <chao.gao@intel.com>
Subject: Re: [PATCH V3 11/29] x86/hvm: Introduce a emulated VTD
	for HVM
Date: Fri, 20 Oct 2017 10:46:40 +0800
Message-ID: <20171020024640.GE74825@op-computing>
References: <1506049330-11196-1-git-send-email-tianyu.lan@intel.com>
 <1506049330-11196-12-git-send-email-tianyu.lan@intel.com>
 <20171019112035.juze2w6zmlswco4d@dhcp-3-128.uk.xensource.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Return-path: <xen-devel-bounces@lists.xen.org>
Content-Disposition: inline
In-Reply-To: <20171019112035.juze2w6zmlswco4d@dhcp-3-128.uk.xensource.com>
List-Unsubscribe: <https://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: <https://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: Roger Pau =?iso-8859-1?Q?Monn=E9?= <roger.pau@citrix.com>
Cc: Lan Tianyu <tianyu.lan@intel.com>, tim@xen.org, kevin.tian@intel.com, sstabellini@kernel.org, wei.liu2@citrix.com, konrad.wilk@oracle.com, George.Dunlap@eu.citrix.com, andrew.cooper3@citrix.com, ian.jackson@eu.citrix.com, xen-devel@lists.xen.org, jbeulich@suse.com
List-Id: xen-devel@lists.xenproject.org
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