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=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,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 6BEB1C282E3 for ; Sun, 21 Apr 2019 01:28:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4319C208C0 for ; Sun, 21 Apr 2019 01:28:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727354AbfDUB2s (ORCPT ); Sat, 20 Apr 2019 21:28:48 -0400 Received: from mga18.intel.com ([134.134.136.126]:3762 "EHLO mga18.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725895AbfDUB2s (ORCPT ); Sat, 20 Apr 2019 21:28:48 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga008.jf.intel.com ([10.7.209.65]) by orsmga106.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 20 Apr 2019 18:28:47 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.60,376,1549958400"; d="scan'208";a="136008124" Received: from allen-box.sh.intel.com ([10.239.159.136]) by orsmga008.jf.intel.com with ESMTP; 20 Apr 2019 18:23:47 -0700 From: Lu Baolu To: David Woodhouse , Joerg Roedel Cc: ashok.raj@intel.com, jacob.jun.pan@intel.com, alan.cox@intel.com, kevin.tian@intel.com, mika.westerberg@linux.intel.com, pengfei.xu@intel.com, Konrad Rzeszutek Wilk , Christoph Hellwig , Marek Szyprowski , Robin Murphy , iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, Lu Baolu Subject: [PATCH v3 01/10] iommu: Add helper to get minimal page size of domain Date: Sun, 21 Apr 2019 09:17:10 +0800 Message-Id: <20190421011719.14909-2-baolu.lu@linux.intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190421011719.14909-1-baolu.lu@linux.intel.com> References: <20190421011719.14909-1-baolu.lu@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This makes it possible for other modules to know the minimal page size supported by a domain without the knowledge of the structure details. Signed-off-by: Lu Baolu --- include/linux/iommu.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/include/linux/iommu.h b/include/linux/iommu.h index a5007d035218..46679ef19b7e 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -377,6 +377,14 @@ static inline void iommu_tlb_sync(struct iommu_domain *domain) domain->ops->iotlb_sync(domain); } +static inline unsigned long domain_minimal_pgsize(struct iommu_domain *domain) +{ + if (domain && domain->pgsize_bitmap) + return 1 << __ffs(domain->pgsize_bitmap); + + return 0; +} + /* PCI device grouping function */ extern struct iommu_group *pci_device_group(struct device *dev); /* Generic device grouping function */ @@ -704,6 +712,11 @@ const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode) return NULL; } +static inline unsigned long domain_minimal_pgsize(struct iommu_domain *domain) +{ + return 0; +} + #endif /* CONFIG_IOMMU_API */ #ifdef CONFIG_IOMMU_DEBUGFS -- 2.17.1