From mboxrd@z Thu Jan  1 00:00:00 1970
From: Konrad Rzeszutek Wilk via dri-devel <dri-devel@lists.freedesktop.org>
Subject: Re: [Xen-devel] Upstream Dom0 DRM problems regarding swiotlb
Date: Fri, 15 Feb 2019 11:26:41 -0500
Message-ID: <20190215162641.GA32461@char.us.oracle.com>
References: <CAOQxz3xUKnsoiT-rF5+ZJwkCUS4cTPQjSG5PHvaPaDrq87CqWQ@mail.gmail.com>
 <20190213191602.GC16558@char.us.oracle.com>
 <CAOQxz3xqaYq8JKWwHbS8oBDB3krtW4saozEoURcz8OtN23jqrA@mail.gmail.com>
 <54ddc7c8-8ba3-bcd2-081e-af2a0ddc4c76@citrix.com>
 <CAOQxz3x1t5F=Ey+4LyuSnCHR2XMZBMxwECbuP0HCJKqqcOkBeQ@mail.gmail.com>
 <8f05efab-4107-02ea-4bab-4759ac23d680@citrix.com>
 <a8efb219-f3a9-4f4a-cfca-2c8abb4fc179@suse.com>
 <20190214175705.GA21892@infradead.org>
 <f43c8fbf-8b6a-4bfc-8600-aba5f91e12ff@suse.com>
 <CAOQxz3yhQsRhSTWBSwVhHP-BPqr3uTDpqa8bO44YTgUCYEkbXw@mail.gmail.com>
Reply-To: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Return-path: <dri-devel-bounces@lists.freedesktop.org>
Received: from aserp2130.oracle.com (aserp2130.oracle.com [141.146.126.79])
 by gabe.freedesktop.org (Postfix) with ESMTPS id D953D6EC79
 for <dri-devel@lists.freedesktop.org>; Fri, 15 Feb 2019 16:26:58 +0000 (UTC)
Content-Disposition: inline
In-Reply-To: <CAOQxz3yhQsRhSTWBSwVhHP-BPqr3uTDpqa8bO44YTgUCYEkbXw@mail.gmail.com>
List-Unsubscribe: <https://lists.freedesktop.org/mailman/options/dri-devel>,
 <mailto:dri-devel-request@lists.freedesktop.org?subject=unsubscribe>
List-Archive: <https://lists.freedesktop.org/archives/dri-devel>
List-Post: <mailto:dri-devel@lists.freedesktop.org>
List-Help: <mailto:dri-devel-request@lists.freedesktop.org?subject=help>
List-Subscribe: <https://lists.freedesktop.org/mailman/listinfo/dri-devel>,
 <mailto:dri-devel-request@lists.freedesktop.org?subject=subscribe>
Errors-To: dri-devel-bounces@lists.freedesktop.org
Sender: "dri-devel" <dri-devel-bounces@lists.freedesktop.org>
To: Michael Labriola <michael.d.labriola@gmail.com>, dri-devel@lists.freedesktop.org
Cc: Juergen Gross <jgross@suse.com>, Andrew Cooper <andrew.cooper3@citrix.com>, xen-devel@lists.xen.org, Christoph Hellwig <hch@infradead.org>, Paul Durrant <Paul.Durrant@citrix.com>, Jan Beulich <JBeulich@suse.com>
List-Id: dri-devel@lists.freedesktop.org
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