From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on archive.lwn.net X-Spam-Level: X-Spam-Status: No, score=-6.0 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI,SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.2 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by archive.lwn.net (Postfix) with ESMTP id E184E7D2EF for ; Thu, 30 May 2019 03:50:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732241AbfE3DtV (ORCPT ); Wed, 29 May 2019 23:49:21 -0400 Received: from szxga04-in.huawei.com ([45.249.212.190]:18047 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1729827AbfE3DtU (ORCPT ); Wed, 29 May 2019 23:49:20 -0400 Received: from DGGEMS403-HUB.china.huawei.com (unknown [172.30.72.58]) by Forcepoint Email with ESMTP id A41468F06A13BCCAA76D; Thu, 30 May 2019 11:49:17 +0800 (CST) Received: from HGHY4L002753561.china.huawei.com (10.133.215.186) by DGGEMS403-HUB.china.huawei.com (10.3.19.203) with Microsoft SMTP Server id 14.3.439.0; Thu, 30 May 2019 11:49:10 +0800 From: Zhen Lei To: Jean-Philippe Brucker , John Garry , Robin Murphy , Will Deacon , Joerg Roedel , Jonathan Corbet , linux-doc , Sebastian Ott , Gerald Schaefer , "Martin Schwidefsky" , Heiko Carstens , Benjamin Herrenschmidt , Paul Mackerras , "Michael Ellerman" , Tony Luck , Fenghua Yu , Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H . Peter Anvin" , David Woodhouse , iommu , linux-kernel , linux-s390 , linuxppc-dev , x86 , linux-ia64 CC: Zhen Lei , Hanjun Guo Subject: [PATCH v8 0/7] iommu: enhance IOMMU default DMA mode build options Date: Thu, 30 May 2019 11:48:24 +0800 Message-ID: <20190530034831.4184-1-thunder.leizhen@huawei.com> X-Mailer: git-send-email 2.21.0.windows.1 MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-Originating-IP: [10.133.215.186] X-CFilter-Loop: Reflected Sender: linux-doc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org v7--> v8 1. Split into multiple small patches base on ARCHs or IOMMU drivers. 2. Hide the unsupported build options on the related ARCH or IOMMU. v6 --> v7: 1. Fix some text editing errors v5 --> v6: 1. give up adding boot option iommu.dma_mode v4 --> v5: As Hanjun and Thomas Gleixner's suggestion: 1. Keep the old ARCH specific boot options no change. 2. Keep build option CONFIG_IOMMU_DEFAULT_PASSTHROUGH no change. v4: As Robin Murphy's suggestion: "It's also not necessarily obvious to the user how this interacts with IOMMU_DEFAULT_PASSTHROUGH, so if we really do go down this route, maybe it would be better to refactor the whole lot into a single selection of something like IOMMU_DEFAULT_MODE anyway." In this version, I tried to normalize the IOMMU dma mode boot options for all ARCHs. When IOMMU is enabled, there are 3 dma modes: paasthrough(bypass), lazy(mapping but defer the IOTLB invalidation), strict. But currently each ARCHs defined their private boot options, different with each other. For example, to enable/disable "passthrough", ARM64 use iommu.passthrough=1/0, X86 use iommu=pt/nopt, PPC/POWERNV use iommu=nobypass. Zhen Lei (7): iommu: enhance IOMMU default DMA mode build options x86/dma: use IS_ENABLED() to simplify the code s390/pci: add support for IOMMU default DMA mode build options powernv/iommu: add support for IOMMU default DMA mode build options iommu/vt-d: add support for IOMMU default DMA mode build options iommu/amd: add support for IOMMU default DMA mode build options ia64: hide build option IOMMU_DEFAULT_PASSTHROUGH arch/powerpc/platforms/powernv/pci-ioda.c | 3 +- arch/s390/pci/pci_dma.c | 2 +- arch/x86/kernel/pci-dma.c | 7 ++--- drivers/iommu/Kconfig | 46 ++++++++++++++++++++++++++----- drivers/iommu/amd_iommu_init.c | 3 +- drivers/iommu/intel-iommu.c | 2 +- drivers/iommu/iommu.c | 3 +- 7 files changed, 49 insertions(+), 17 deletions(-) -- 1.8.3