From mboxrd@z Thu Jan  1 00:00:00 1970
From: Alex Williamson <alex.williamson@redhat.com>
Subject: Re: [RFC PATCH 6/6] drm/i915/gvt: support QEMU getting
	the dmabuf
Date: Mon, 15 May 2017 11:44:09 -0600
Message-ID: <20170515114409.414d1fdb@w520.home>
References: <1493372130-27727-1-git-send-email-xiaoguang.chen@intel.com>
 <1493372130-27727-7-git-send-email-xiaoguang.chen@intel.com>
 <1493718658.8581.82.camel@redhat.com>
 <DD379D741F77464281CE7ED1CD7C12DE6FC92D25@SHSMSX101.ccr.corp.intel.com>
 <DD379D741F77464281CE7ED1CD7C12DE6FC93698@SHSMSX101.ccr.corp.intel.com>
 <20170504100833.199bc8ba@t450s.home>
 <1493967331.371.53.camel@redhat.com>
 <20170505091115.7a680636@t450s.home>
 <DD379D741F77464281CE7ED1CD7C12DE70657AF3@SHSMSX101.ccr.corp.intel.com>
 <1494509273.17970.12.camel@redhat.com>
 <20170511094526.164985ee@w520.home>
 <DD379D741F77464281CE7ED1CD7C12DE706583BA@SHSMSX101.ccr.corp.intel.com>
 <20170511205829.672854c3@t450s.home>
 <1494580325.14352.57.camel@redhat.com>
 <20170512103828.4a1378a1@t450s.home>
 <DD379D741F77464281CE7ED1CD7C12DE706592D6@SHSMSX101.ccr.corp.intel.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Return-path: <intel-gfx-bounces@lists.freedesktop.org>
In-Reply-To: <DD379D741F77464281CE7ED1CD7C12DE706592D6@SHSMSX101.ccr.corp.intel.com>
List-Unsubscribe: <https://lists.freedesktop.org/mailman/options/intel-gfx>,
 <mailto:intel-gfx-request@lists.freedesktop.org?subject=unsubscribe>
List-Archive: <https://lists.freedesktop.org/archives/intel-gfx>
List-Post: <mailto:intel-gfx@lists.freedesktop.org>
List-Help: <mailto:intel-gfx-request@lists.freedesktop.org?subject=help>
List-Subscribe: <https://lists.freedesktop.org/mailman/listinfo/intel-gfx>,
 <mailto:intel-gfx-request@lists.freedesktop.org?subject=subscribe>
Errors-To: intel-gfx-bounces@lists.freedesktop.org
Sender: "Intel-gfx" <intel-gfx-bounces@lists.freedesktop.org>
To: "Chen, Xiaoguang" <xiaoguang.chen@intel.com>
Cc: "intel-gfx@lists.freedesktop.org" <intel-gfx@lists.freedesktop.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, "Lv,
 Zhiyuan" <zhiyuan.lv@intel.com>, "intel-gvt-dev@lists.freedesktop.org" <intel-gvt-dev@lists.freedesktop.org>, Gerd Hoffmann <kraxel@redhat.com>
List-Id: intel-gfx@lists.freedesktop.org
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