From mboxrd@z Thu Jan  1 00:00:00 1970
From: Michael D Labriola <michael.d.labriola@gmail.com>
Subject: [PATCH] drm: add func to better detect wether swiotlb
 is needed
Date: Tue, 19 Feb 2019 18:08:12 -0500
Message-ID: <1550617692-27306-1-git-send-email-michael.d.labriola@gmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Return-path: <xen-devel-bounces@lists.xenproject.org>
List-Unsubscribe: <https://lists.xenproject.org/mailman/options/xen-devel>,
 <mailto:xen-devel-request@lists.xenproject.org?subject=unsubscribe>
List-Post: <mailto:xen-devel@lists.xenproject.org>
List-Help: <mailto:xen-devel-request@lists.xenproject.org?subject=help>
List-Subscribe: <https://lists.xenproject.org/mailman/listinfo/xen-devel>,
 <mailto:xen-devel-request@lists.xenproject.org?subject=subscribe>
Errors-To: xen-devel-bounces@lists.xenproject.org
Sender: "Xen-devel" <xen-devel-bounces@lists.xenproject.org>
To: dri-devel@lists.freedesktop.org, Alex Deucher <alexander.deucher@amd.com>, Christian Koenig <christian.koenig@amd.com>, Chunming Zhou <david1.zhou@amd.com>, amd-gfx@lists.freedesktop.org, Monk Liu <monk.liu@amd.com>
Cc: Juergen Gross <jgross@suse.com>, Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>, Andrew Cooper <andrew.cooper3@citrix.com>, Michael D Labriola <michael.d.labriola@gmail.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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