From mboxrd@z Thu Jan  1 00:00:00 1970
From: Lu Baolu <baolu.lu-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
Subject: Re: [RFC] iommu/vt-d: Group and domain relationship
Date: Thu, 8 Nov 2018 09:42:57 +0800
Message-ID: <14cb4192-8557-72e1-ef26-4155b2cd7e63@linux.intel.com>
References: <44573340-5652-42F1-A4B8-102AEF5C162A@arista.com>
	<5695aa18-3248-b611-a286-111de7e5a8f5@linux.intel.com>
	<CALwnD_qUhQu-fwOObth-DWzSNoARZ_ERuNwyS8r73C0yhw7jGQ@mail.gmail.com>
	<b92b1739-dc3e-9515-a6f1-e4c00f53882b@linux.intel.com>
	<A393DB8A-BFC6-40C2-B9E8-6667A927957E@arista.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"; Format="flowed"
Content-Transfer-Encoding: base64
Return-path: <iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org>
In-Reply-To: <A393DB8A-BFC6-40C2-B9E8-6667A927957E-nzgTgzXrdUbQT0dZR+AlfA@public.gmane.org>
Content-Language: en-US
List-Unsubscribe: <https://lists.linuxfoundation.org/mailman/options/iommu>,
	<mailto:iommu-request-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org?subject=unsubscribe>
List-Archive: <http://lists.linuxfoundation.org/pipermail/iommu/>
List-Post: <mailto:iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org>
List-Help: <mailto:iommu-request-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org?subject=help>
List-Subscribe: <https://lists.linuxfoundation.org/mailman/listinfo/iommu>,
	<mailto:iommu-request-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org?subject=subscribe>
Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org
Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org
To: James Sewart <jamessewart-nzgTgzXrdUbQT0dZR+AlfA@public.gmane.org>
Cc: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org
List-Id: iommu@lists.linux-foundation.org
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=