From mboxrd@z Thu Jan  1 00:00:00 1970
From: Wei Liu <wei.liu2@citrix.com>
Subject: Re: Device model operation hypercall (DMOP,
	re qemu depriv)
Date: Tue, 2 Aug 2016 13:34:44 +0100
Message-ID: <20160802123444.GJ22419@citrix.com>
References: <579A3A62.1020700@citrix.com>
 <22431.13158.46970.556765@mariner.uk.xensource.com>
 <20160802113737.GF22419@citrix.com>
 <3b09f5be-3175-3ae9-f9d2-d44704fc03ed@citrix.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Return-path: <xen-devel-bounces@lists.xen.org>
Received: from mail6.bemta5.messagelabs.com ([195.245.231.135])
 by lists.xenproject.org with esmtp (Exim 4.84_2)
 (envelope-from <prvs=0151e7be4=wei.liu2@citrix.com>)
 id 1bUYuG-0006vm-Um
 for xen-devel@lists.xenproject.org; Tue, 02 Aug 2016 12:34:49 +0000
Content-Disposition: inline
In-Reply-To: <3b09f5be-3175-3ae9-f9d2-d44704fc03ed@citrix.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: George Dunlap <george.dunlap@citrix.com>
Cc: Stefano Stabellini <sstabellini@kernel.org>, Wei Liu <wei.liu2@citrix.com>, George Dunlap <George.Dunlap@eu.citrix.com>, Andrew Cooper <andrew.cooper3@citrix.com>, Ian Jackson <ian.jackson@eu.citrix.com>, Tim Deegan <tim@xen.org>, David Vrabel <david.vrabel@citrix.com>, Jan Beulich <JBeulich@suse.com>, Anthony Perard <anthony.perard@citrix.com>, xen-devel <xen-devel@lists.xenproject.org>, dgdegra@tycho.nsa.gov
List-Id: xen-devel@lists.xenproject.org
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