From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753741AbbAHIeY (ORCPT ); Thu, 8 Jan 2015 03:34:24 -0500 Received: from smtprelay01.ispgateway.de ([80.67.18.43]:38337 "EHLO smtprelay01.ispgateway.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752686AbbAHIeX (ORCPT ); Thu, 8 Jan 2015 03:34:23 -0500 Message-ID: <54AE410B.40101@ladisch.de> Date: Thu, 08 Jan 2015 09:34:19 +0100 From: Clemens Ladisch User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:31.0) Gecko/20100101 Thunderbird/31.3.0 MIME-Version: 1.0 To: Raimonds Cicans , linux-kernel@vger.kernel.org Subject: Re: Questions about IOMMU & PCIe switch References: <54ACB0D4.3000008@apollo.lv> <54AD21E2.2020100@ladisch.de> <54AD3D0B.6060501@apollo.lv> In-Reply-To: <54AD3D0B.6060501@apollo.lv> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Df-Sender: bGludXgta2VybmVsQGNsLmRvbWFpbmZhY3Rvcnkta3VuZGUuZGU= Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Raimonds Cicans wrote: > https://github.com/ljalves/linux_media/issues/66 If the TBS driver works, why don't you use it? The WARNING from the kernel log indicates a hardware bug in the PCIe bridge. Do you have the same card, and do you also get this warning with kernel 3.16? I/O virtualization requires handling packets from different devices differently. Problems with DMAR might indicate that some PCIe device does not correctly identify itself as the source of PCIe packets. Regards, Clemens