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=-7.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS 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 D301CC07542 for ; Mon, 27 May 2019 08:56:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B099521721 for ; Mon, 27 May 2019 08:56:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726724AbfE0I43 (ORCPT ); Mon, 27 May 2019 04:56:29 -0400 Received: from mx1.redhat.com ([209.132.183.28]:40662 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725869AbfE0I43 (ORCPT ); Mon, 27 May 2019 04:56:29 -0400 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 153197FDFD; Mon, 27 May 2019 08:56:29 +0000 (UTC) Received: from laptop.redhat.com (ovpn-116-67.ams2.redhat.com [10.36.116.67]) by smtp.corp.redhat.com (Postfix) with ESMTP id 25B825D723; Mon, 27 May 2019 08:56:23 +0000 (UTC) From: Eric Auger To: eric.auger.pro@gmail.com, eric.auger@redhat.com, joro@8bytes.org, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, dwmw2@infradead.org, lorenzo.pieralisi@arm.com, robin.murphy@arm.com, will.deacon@arm.com, hanjun.guo@linaro.org, sudeep.holla@arm.com Cc: alex.williamson@redhat.com, shameerali.kolothum.thodi@huawei.com Subject: [PATCH v4 5/8] iommu/vt-d: Handle RMRR with PCI bridge device scopes Date: Mon, 27 May 2019 10:55:38 +0200 Message-Id: <20190527085541.5294-6-eric.auger@redhat.com> In-Reply-To: <20190527085541.5294-1-eric.auger@redhat.com> References: <20190527085541.5294-1-eric.auger@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.27]); Mon, 27 May 2019 08:56:29 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When reading the vtd specification and especially the Reserved Memory Region Reporting Structure chapter, it is not obvious a device scope element cannot be a PCI-PCI bridge, in which case all downstream ports are likely to access the reserved memory region. Let's handle this case in device_has_rmrr. Fixes: ea2447f700ca ("intel-iommu: Prevent devices with RMRRs from being placed into SI Domain") Signed-off-by: Eric Auger --- v1 -> v2: - is_downstream_to_pci_bridge helper introduced in a separate patch --- drivers/iommu/intel-iommu.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 15c2f9677491..7ed820e79313 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -2910,7 +2910,8 @@ static bool device_has_rmrr(struct device *dev) */ for_each_active_dev_scope(rmrr->devices, rmrr->devices_cnt, i, tmp) - if (tmp == dev) { + if (tmp == dev || + is_downstream_to_pci_bridge(dev, tmp)) { rcu_read_unlock(); return true; } -- 2.20.1 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=-7.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED 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 1CD8CC07542 for ; Mon, 27 May 2019 08:57:26 +0000 (UTC) Received: from mail.linuxfoundation.org (mail.linuxfoundation.org [140.211.169.12]) (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 EE32421721 for ; Mon, 27 May 2019 08:57:25 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org EE32421721 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from mail.linux-foundation.org (localhost [127.0.0.1]) by mail.linuxfoundation.org (Postfix) with ESMTP id E1DC8162D; Mon, 27 May 2019 08:56:46 +0000 (UTC) Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id C802F1605 for ; Mon, 27 May 2019 08:56:29 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 88EDF13A for ; Mon, 27 May 2019 08:56:29 +0000 (UTC) Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 153197FDFD; Mon, 27 May 2019 08:56:29 +0000 (UTC) Received: from laptop.redhat.com (ovpn-116-67.ams2.redhat.com [10.36.116.67]) by smtp.corp.redhat.com (Postfix) with ESMTP id 25B825D723; Mon, 27 May 2019 08:56:23 +0000 (UTC) From: Eric Auger To: eric.auger.pro@gmail.com, eric.auger@redhat.com, joro@8bytes.org, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, dwmw2@infradead.org, lorenzo.pieralisi@arm.com, robin.murphy@arm.com, will.deacon@arm.com, hanjun.guo@linaro.org, sudeep.holla@arm.com Subject: [PATCH v4 5/8] iommu/vt-d: Handle RMRR with PCI bridge device scopes Date: Mon, 27 May 2019 10:55:38 +0200 Message-Id: <20190527085541.5294-6-eric.auger@redhat.com> In-Reply-To: <20190527085541.5294-1-eric.auger@redhat.com> References: <20190527085541.5294-1-eric.auger@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.27]); Mon, 27 May 2019 08:56:29 +0000 (UTC) Cc: alex.williamson@redhat.com X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.12 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 Sender: iommu-bounces@lists.linux-foundation.org Errors-To: iommu-bounces@lists.linux-foundation.org When reading the vtd specification and especially the Reserved Memory Region Reporting Structure chapter, it is not obvious a device scope element cannot be a PCI-PCI bridge, in which case all downstream ports are likely to access the reserved memory region. Let's handle this case in device_has_rmrr. Fixes: ea2447f700ca ("intel-iommu: Prevent devices with RMRRs from being placed into SI Domain") Signed-off-by: Eric Auger --- v1 -> v2: - is_downstream_to_pci_bridge helper introduced in a separate patch --- drivers/iommu/intel-iommu.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 15c2f9677491..7ed820e79313 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -2910,7 +2910,8 @@ static bool device_has_rmrr(struct device *dev) */ for_each_active_dev_scope(rmrr->devices, rmrr->devices_cnt, i, tmp) - if (tmp == dev) { + if (tmp == dev || + is_downstream_to_pci_bridge(dev, tmp)) { rcu_read_unlock(); return true; } -- 2.20.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu