From patchwork Thu Nov 22 19:37:54 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jean-Philippe Brucker X-Patchwork-Id: 10694727 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id F39C613B5 for ; Thu, 22 Nov 2018 19:39:33 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E3F2B2C9C3 for ; Thu, 22 Nov 2018 19:39:33 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D3CD22CAAC; Thu, 22 Nov 2018 19:39:33 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 495AB2C9C3 for ; Thu, 22 Nov 2018 19:39:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2438368AbeKWGUT (ORCPT ); Fri, 23 Nov 2018 01:20:19 -0500 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70]:56358 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731412AbeKWGUS (ORCPT ); Fri, 23 Nov 2018 01:20:18 -0500 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 07F2D2E96; Thu, 22 Nov 2018 11:39:30 -0800 (PST) Received: from ostrya.cambridge.arm.com (ostrya.cambridge.arm.com [10.1.196.78]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 9B89B3F575; Thu, 22 Nov 2018 11:39:26 -0800 (PST) From: Jean-Philippe Brucker To: iommu@lists.linux-foundation.org, linux-pci@vger.kernel.org, devicetree@vger.kernel.org, virtualization@lists.linux-foundation.org, virtio-dev@lists.oasis-open.org, joro@8bytes.org, mst@redhat.com Cc: jasowang@redhat.com, robh+dt@kernel.org, mark.rutland@arm.com, bhelgaas@google.com, frowand.list@gmail.com, kvmarm@lists.cs.columbia.edu, eric.auger@redhat.com, tnowicki@caviumnetworks.com, kevin.tian@intel.com, marc.zyngier@arm.com, robin.murphy@arm.com, will.deacon@arm.com, lorenzo.pieralisi@arm.com, bharat.bhushan@nxp.com Subject: [PATCH v5 0/7] Add virtio-iommu driver Date: Thu, 22 Nov 2018 19:37:54 +0000 Message-Id: <20181122193801.50510-1-jean-philippe.brucker@arm.com> X-Mailer: git-send-email 2.19.1 MIME-Version: 1.0 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Implement the virtio-iommu driver, following specification v0.9 [1]. Since v4 [2] I fixed the issues reported by Eric, and added Reviewed-by from Eric and Rob. Thanks! I changed the specification to fix one inconsistency discussed in v4. That the device fills the probe buffer with zeroes is now a "SHOULD" instead of a "MAY", since it's the only way for the driver to know if the device wrote the status. Existing devices already do this. In addition the device now needs to fill the three padding bytes at the tail with zeroes. You can find Linux driver and kvmtool device on branches virtio-iommu/v0.9 [3]. I also lightly tested with Eric's latest QEMU device [4]. [1] Virtio-iommu specification v0.9, sources, pdf and diff from v0.8 git://linux-arm.org/virtio-iommu.git virtio-iommu/v0.9 http://jpbrucker.net/virtio-iommu/spec/v0.9/virtio-iommu-v0.9.pdf http://jpbrucker.net/virtio-iommu/spec/diffs/virtio-iommu-pdf-diff-v0.8-v0.9.pdf [2] [PATCH v4 0/7] Add virtio-iommu driver https://lists.linuxfoundation.org/pipermail/iommu/2018-November/031074.html [3] git://linux-arm.org/linux-jpb.git virtio-iommu/v0.9 git://linux-arm.org/kvmtool-jpb.git virtio-iommu/v0.9 [4] [RFC v9 00/17] VIRTIO-IOMMU device https://www.mail-archive.com/qemu-devel@nongnu.org/msg575578.html Jean-Philippe Brucker (7): dt-bindings: virtio-mmio: Add IOMMU description dt-bindings: virtio: Add virtio-pci-iommu node of: Allow the iommu-map property to omit untranslated devices PCI: OF: Initialize dev->fwnode appropriately iommu: Add virtio-iommu driver iommu/virtio: Add probe request iommu/virtio: Add event queue .../devicetree/bindings/virtio/iommu.txt | 66 + .../devicetree/bindings/virtio/mmio.txt | 30 + MAINTAINERS | 7 + drivers/iommu/Kconfig | 11 + drivers/iommu/Makefile | 1 + drivers/iommu/virtio-iommu.c | 1157 +++++++++++++++++ drivers/of/base.c | 10 +- drivers/pci/of.c | 7 + include/uapi/linux/virtio_ids.h | 1 + include/uapi/linux/virtio_iommu.h | 161 +++ 10 files changed, 1448 insertions(+), 3 deletions(-) create mode 100644 Documentation/devicetree/bindings/virtio/iommu.txt create mode 100644 drivers/iommu/virtio-iommu.c create mode 100644 include/uapi/linux/virtio_iommu.h Tested-by: Eric Auger Tested-by: Bharat Bhushan