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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT 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 D26CDC10F27 for ; Sat, 7 Mar 2020 06:23:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id ABB422073B for ; Sat, 7 Mar 2020 06:23:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726199AbgCGGXO (ORCPT ); Sat, 7 Mar 2020 01:23:14 -0500 Received: from mga07.intel.com ([134.134.136.100]:29697 "EHLO mga07.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726065AbgCGGXN (ORCPT ); Sat, 7 Mar 2020 01:23:13 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga105.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 06 Mar 2020 22:23:13 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,525,1574150400"; d="scan'208";a="352915146" Received: from allen-box.sh.intel.com ([10.239.159.139]) by fmsmga001.fm.intel.com with ESMTP; 06 Mar 2020 22:23:10 -0800 From: Lu Baolu To: Joerg Roedel Cc: ashok.raj@intel.com, jacob.jun.pan@linux.intel.com, kevin.tian@intel.com, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, Daniel Drake , Derrick Jonathan , Jerry Snitselaar , Robin Murphy , Christoph Hellwig , Sai Praneeth Prakhya , Lu Baolu Subject: [PATCH 1/6] iommu: Add dev_def_domain_type() callback in iommu_ops Date: Sat, 7 Mar 2020 14:20:09 +0800 Message-Id: <20200307062014.3288-2-baolu.lu@linux.intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200307062014.3288-1-baolu.lu@linux.intel.com> References: <20200307062014.3288-1-baolu.lu@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Sai Praneeth Prakhya Some devices are reqired to use a specific type (identity or dma) of default domain when they are used with a vendor iommu. When the system level default domain type is different from it, the vendor iommu driver has to request a new default domain with iommu_request_dma_domain_for_dev() and iommu_request_dm_for_dev() in the add_dev() callback. Unfortunately, these two helpers only work when the group hasn't been assigned to any other devices, hence, some vendor iommu driver has to use a private domain if it fails to request a new default one. This adds dev_def_domain_type() callback in the iommu_ops, so that the special requirement of default domain for a device could be aware by the iommu generic layer. Signed-off-by: Sai Praneeth Prakhya Signed-off-by: Lu Baolu --- include/linux/iommu.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/include/linux/iommu.h b/include/linux/iommu.h index d1b5f4d98569..0c1e95e6b263 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -248,6 +248,10 @@ struct iommu_iotlb_gather { * @cache_invalidate: invalidate translation caches * @sva_bind_gpasid: bind guest pasid and mm * @sva_unbind_gpasid: unbind guest pasid and mm + * @dev_def_domain_type: device default domain type, return value: + * - IOMMU_DOMAIN_IDENTITY: must use an identity domain + * - IOMMU_DOMAIN_DMA: must use a dma domain + * - 0: use the default setting * @pgsize_bitmap: bitmap of all possible supported page sizes * @owner: Driver module providing these ops */ @@ -318,6 +322,8 @@ struct iommu_ops { int (*sva_unbind_gpasid)(struct device *dev, int pasid); + int (*dev_def_domain_type)(struct device *dev); + unsigned long pgsize_bitmap; struct module *owner; }; -- 2.17.1