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=-5.7 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 427E97D90D for ; Wed, 14 Aug 2019 13:39:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727982AbfHNNio (ORCPT ); Wed, 14 Aug 2019 09:38:44 -0400 Received: from 8bytes.org ([81.169.241.247]:49294 "EHLO theia.8bytes.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726821AbfHNNio (ORCPT ); Wed, 14 Aug 2019 09:38:44 -0400 Received: by theia.8bytes.org (Postfix, from userid 1000) id D7694246; Wed, 14 Aug 2019 15:38:42 +0200 (CEST) From: Joerg Roedel To: Joerg Roedel Cc: corbet@lwn.net, tony.luck@intel.com, fenghua.yu@intel.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, hpa@zytor.com, x86@kernel.org, linux-doc@vger.kernel.org, linux-ia64@vger.kernel.org, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, Thomas.Lendacky@amd.com, Suravee.Suthikulpanit@amd.com, Joerg Roedel Subject: [PATCH 01/10] iommu: Add helpers to set/get default domain type Date: Wed, 14 Aug 2019 15:38:32 +0200 Message-Id: <20190814133841.7095-2-joro@8bytes.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190814133841.7095-1-joro@8bytes.org> References: <20190814133841.7095-1-joro@8bytes.org> Sender: linux-doc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org From: Joerg Roedel Add a couple of functions to allow changing the default domain type from architecture code and a function for iommu drivers to request whether the default domain is passthrough. Signed-off-by: Joerg Roedel --- drivers/iommu/iommu.c | 16 ++++++++++++++++ include/linux/iommu.h | 16 ++++++++++++++++ 2 files changed, 32 insertions(+) diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 0c674d80c37f..f187e85a074b 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -2196,6 +2196,22 @@ int iommu_request_dma_domain_for_dev(struct device *dev) return request_default_domain_for_dev(dev, IOMMU_DOMAIN_DMA); } +void iommu_set_default_passthrough(void) +{ + iommu_def_domain_type = IOMMU_DOMAIN_IDENTITY; +} + +void iommu_set_default_translated(void) +{ + iommu_def_domain_type = IOMMU_DOMAIN_DMA; +} + +bool iommu_default_passthrough(void) +{ + return iommu_def_domain_type == IOMMU_DOMAIN_IDENTITY; +} +EXPORT_SYMBOL_GPL(iommu_default_passthrough); + const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode) { const struct iommu_ops *ops = NULL; diff --git a/include/linux/iommu.h b/include/linux/iommu.h index fdc355ccc570..58c3e3e5f157 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -413,6 +413,9 @@ extern void iommu_get_resv_regions(struct device *dev, struct list_head *list); extern void iommu_put_resv_regions(struct device *dev, struct list_head *list); extern int iommu_request_dm_for_dev(struct device *dev); extern int iommu_request_dma_domain_for_dev(struct device *dev); +extern void iommu_set_default_passthrough(void); +extern void iommu_set_default_translated(void); +extern bool iommu_default_passthrough(void); extern struct iommu_resv_region * iommu_alloc_resv_region(phys_addr_t start, size_t length, int prot, enum iommu_resv_type type); @@ -694,6 +697,19 @@ static inline int iommu_request_dma_domain_for_dev(struct device *dev) return -ENODEV; } +static inline void iommu_set_default_passthrough(void) +{ +} + +static inline void iommu_set_default_translated(void) +{ +} + +static inline bool iommu_default_passthrough(void) +{ + return true; +} + static inline int iommu_attach_group(struct iommu_domain *domain, struct iommu_group *group) { -- 2.17.1