From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753795AbcE3D1j (ORCPT ); Sun, 29 May 2016 23:27:39 -0400 Received: from mx1.redhat.com ([209.132.183.28]:57703 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753569AbcE3D1i (ORCPT ); Sun, 29 May 2016 23:27:38 -0400 Date: Mon, 30 May 2016 11:27:33 +0800 From: Baoquan He To: Wan Zongshun Cc: joro@8bytes.org, linux-kernel@vger.kernel.org, vincent.wan@amd.com, iommu@lists.linux-foundation.org, dyoung@redhat.com Subject: Re: [Patch v4 3/9] iommu/amd: Detect pre enabled translation Message-ID: <20160530032733.GC2488@x1.redhat.com> References: <1464157735-8865-1-git-send-email-bhe@redhat.com> <1464157735-8865-4-git-send-email-bhe@redhat.com> <3371fab6-b3db-6f4a-a1a1-b272c3f8fdbe@iommu.org> <20160530032407.GB2488@x1.redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20160530032407.GB2488@x1.redhat.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.38]); Mon, 30 May 2016 03:27:37 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 05/30/16 at 11:24am, Baoquan He wrote: > On 05/28/16 at 08:49pm, Wan Zongshun wrote: > In fact I am still debugging and trying to figure out what need be done > further to stop the IO_PAGE_FAULT happened on ethernet network card. I > kept changing code and adjust the patches. Up to now seems I still > didn't figure out why. There must be something I didn't notice and > everything will be fine as soon as I close that valve. With my > understand pci bug scanning will detect each pci device and do the |_ bus > initialization job like setting configuration space registers and > control registers. After that we can safely re-init the pci device and > re-install the new io-page tables, and this is how Joerg has done for > vt-d fix for kdump if my understanding is correct. And I tried to do > like that in this patchset, don't know why it doesn't work.