From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D0337C43603 for ; Tue, 17 Dec 2019 09:30:55 +0000 (UTC) Received: from hemlock.osuosl.org (smtp2.osuosl.org [140.211.166.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 850DA207FF for ; Tue, 17 Dec 2019 09:30:55 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 850DA207FF Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=8bytes.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by hemlock.osuosl.org (Postfix) with ESMTP id 440D0878ED; Tue, 17 Dec 2019 09:30:55 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from hemlock.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id s9iFI8QJCeBy; Tue, 17 Dec 2019 09:30:53 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by hemlock.osuosl.org (Postfix) with ESMTP id 049D6878F7; Tue, 17 Dec 2019 09:30:53 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id D725BC1D7D; Tue, 17 Dec 2019 09:30:52 +0000 (UTC) Received: from silver.osuosl.org (smtp3.osuosl.org [140.211.166.136]) by lists.linuxfoundation.org (Postfix) with ESMTP id 0E486C077D for ; Tue, 17 Dec 2019 09:30:52 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by silver.osuosl.org (Postfix) with ESMTP id E912A204BE for ; Tue, 17 Dec 2019 09:30:51 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from silver.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 7G0ED2zSBhTN for ; Tue, 17 Dec 2019 09:30:50 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from theia.8bytes.org (8bytes.org [81.169.241.247]) by silver.osuosl.org (Postfix) with ESMTPS id 453E120481 for ; Tue, 17 Dec 2019 09:30:50 +0000 (UTC) Received: by theia.8bytes.org (Postfix, from userid 1000) id 8604D286; Tue, 17 Dec 2019 10:30:45 +0100 (CET) Date: Tue, 17 Dec 2019 10:30:44 +0100 From: Joerg Roedel To: Adrian Huang Subject: Re: [PATCH 1/1] iommu/amd: Treat per-device exclusion ranges as r/w unity-mapped regions Message-ID: <20191217093043.GB8689@8bytes.org> References: <20191114061447.14604-1-ahuang12@lenovo.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20191114061447.14604-1-ahuang12@lenovo.com> User-Agent: Mutt/1.10.1 (2018-07-13) Cc: iommu@lists.linux-foundation.org, Adrian Huang X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" On Thu, Nov 14, 2019 at 02:14:47PM +0800, Adrian Huang wrote: > Some buggy BIOSes might define multiple exclusion ranges of the > IVMD entries which are associated with the same IOMMU hardware. > This leads to the overwritten exclusion range (exclusion_start > and exclusion_length members) in set_device_exclusion_range(). > > Here is a real case: > When attaching two Broadcom RAID controllers to a server, the first > one reports the failure during booting (the disks connecting to the > RAID controller cannot be detected). > > This patch prevents the issue by treating per-device exclusion > ranges as r/w unity-mapped regions. > > Discussion: > * https://lists.linuxfoundation.org/pipermail/iommu/2019-November/040140.html > > Suggested-by: Joerg Roedel > Signed-off-by: Adrian Huang > --- > drivers/iommu/amd_iommu_init.c | 20 ++++++++++---------- > 1 file changed, 10 insertions(+), 10 deletions(-) Applied, thanks. _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu