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=-7.6 required=3.0 tests=DATE_IN_PAST_06_12, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 1B803C282DD for ; Fri, 10 Jan 2020 23:24:09 +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 EF543206ED for ; Fri, 10 Jan 2020 23:24:08 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org EF543206ED Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com 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 6F9D588582; Fri, 10 Jan 2020 23:24:07 +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 7VwesaFeP9hA; Fri, 10 Jan 2020 23:24:06 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by hemlock.osuosl.org (Postfix) with ESMTP id 52D4288581; Fri, 10 Jan 2020 23:24:06 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 41A89C1D7D; Fri, 10 Jan 2020 23:24:06 +0000 (UTC) Received: from fraxinus.osuosl.org (smtp4.osuosl.org [140.211.166.137]) by lists.linuxfoundation.org (Postfix) with ESMTP id A4AA6C0881 for ; Fri, 10 Jan 2020 23:24:04 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by fraxinus.osuosl.org (Postfix) with ESMTP id A18E586C4B for ; Fri, 10 Jan 2020 23:24:04 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from fraxinus.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id tn3MQV9U2aSb for ; Fri, 10 Jan 2020 23:24:02 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mga06.intel.com (mga06.intel.com [134.134.136.31]) by fraxinus.osuosl.org (Postfix) with ESMTPS id 99C8F86C47 for ; Fri, 10 Jan 2020 23:24:02 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga007.jf.intel.com ([10.7.209.58]) by orsmga104.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 10 Jan 2020 15:24:01 -0800 X-IronPort-AV: E=Sophos;i="5.69,418,1571727600"; d="scan'208";a="212412125" Received: from unknown (HELO nsgsw-rhel7p6.lm.intel.com) ([10.232.116.226]) by orsmga007-auth.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 10 Jan 2020 15:24:00 -0800 From: Jon Derrick To: , Subject: [PATCH v3 0/5] Clean up VMD DMA Map Ops Date: Fri, 10 Jan 2020 10:21:08 -0700 Message-Id: <1578676873-6206-1-git-send-email-jonathan.derrick@intel.com> X-Mailer: git-send-email 1.8.3.1 Cc: Bjorn Helgaas , Keith Busch , David Woodhouse , Christoph Hellwig , Jon Derrick 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: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" v2 Set: https://lore.kernel.org/linux-iommu/1578580256-3483-1-git-send-email-jonathan.derrick@intel.com/T/#t v1 Set: https://lore.kernel.org/linux-iommu/20200107134125.GD30750@8bytes.org/T/#t VMD currently works with VT-d enabled by pointing DMA and IOMMU actions at the VMD endpoint. The problem with this approach is that the VMD endpoint's device-specific attributes, such as the DMA Mask Bits, are used instead. This set cleans up VMD by removing the override that redirects DMA map operations to the VMD endpoint. Instead it introduces a new DMA alias mechanism into the existing DMA alias infrastructure. v1 added a pointer in struct pci_dev that pointed to the DMA alias' struct pci_dev and did the necessary DMA alias and IOMMU modifications. v2 introduced a new weak function to reference the 'Direct DMA Alias', and removed the need to add a pointer in struct device or pci_dev. Weak functions are generally frowned upon when it's a single architecture implementation, so I am open to alternatives. v3 references the pci_dev rather than the struct device for the PCI 'Direct DMA Alias' (pci_direct_dma_alias()). This revision also allows pci_for_each_dma_alias() to call any DMA aliases for the Direct DMA alias device, though I don't expect the VMD endpoint to need intra-bus DMA aliases. Changes from v2: Uses struct pci_dev for PCI Device 'Direct DMA aliasing' (pci_direct_dma_alias) Allows pci_for_each_dma_alias to iterate over the alias mask of the 'Direct DMA alias' Changes from v1: Removed 1/5 & 2/5 misc fix patches that were merged Uses Christoph's staging/cleanup patches Introduce weak function rather than including pointer in struct device or pci_dev. Based on Joerg's next: https://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git/ Jon Derrick (5): x86/pci: Add a to_pci_sysdata helper x86/PCI: Expose VMD's PCI Device in pci_sysdata PCI: Introduce pci_direct_dma_alias() PCI: vmd: Stop overriding dma_map_ops x86/pci: Remove X86_DEV_DMA_OPS arch/x86/Kconfig | 3 - arch/x86/include/asm/device.h | 10 --- arch/x86/include/asm/pci.h | 31 ++++----- arch/x86/pci/common.c | 45 ++---------- drivers/iommu/intel-iommu.c | 18 +++-- drivers/pci/controller/Kconfig | 1 - drivers/pci/controller/vmd.c | 152 +---------------------------------------- drivers/pci/pci.c | 19 +++++- drivers/pci/search.c | 7 ++ include/linux/pci.h | 1 + 10 files changed, 61 insertions(+), 226 deletions(-) -- 1.8.3.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu