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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 25242C43332 for ; Wed, 10 Mar 2021 09:07:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 01BBA64F2D for ; Wed, 10 Mar 2021 09:07:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232829AbhCJJHa (ORCPT ); Wed, 10 Mar 2021 04:07:30 -0500 Received: from szxga05-in.huawei.com ([45.249.212.191]:13497 "EHLO szxga05-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232684AbhCJJGz (ORCPT ); Wed, 10 Mar 2021 04:06:55 -0500 Received: from DGGEMS409-HUB.china.huawei.com (unknown [172.30.72.60]) by szxga05-in.huawei.com (SkyGuard) with ESMTP id 4DwR3z3vPkzrTKS; Wed, 10 Mar 2021 17:05:03 +0800 (CST) Received: from DESKTOP-5IS4806.china.huawei.com (10.174.184.42) by DGGEMS409-HUB.china.huawei.com (10.3.19.209) with Microsoft SMTP Server id 14.3.498.0; Wed, 10 Mar 2021 17:06:25 +0800 From: Keqian Zhu To: , , , Alex Williamson , Robin Murphy , Yi Sun , Will Deacon CC: Kirti Wankhede , Cornelia Huck , Marc Zyngier , Catalin Marinas , Mark Rutland , James Morse , Suzuki K Poulose , , , , Subject: [PATCH v2 08/11] iommu/arm-smmu-v3: Add HWDBM device feature reporting Date: Wed, 10 Mar 2021 17:06:11 +0800 Message-ID: <20210310090614.26668-9-zhukeqian1@huawei.com> X-Mailer: git-send-email 2.8.4.windows.1 In-Reply-To: <20210310090614.26668-1-zhukeqian1@huawei.com> References: <20210310090614.26668-1-zhukeqian1@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.174.184.42] X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: jiangkunkun We have implemented these interfaces required to support iommu dirty log tracking. The last step is reporting this feature to upper user, then the user can perform higher policy base on it. This adds a new dev feature named IOMMU_DEV_FEAT_HWDBM in iommu layer. For arm smmuv3, it is equal to ARM_SMMU_FEAT_HD and it is enabled by default if supported. Other types of IOMMU can enable it by default or when dev_enable_feature() is called. Co-developed-by: Keqian Zhu Signed-off-by: Kunkun Jiang --- changelog: v2: - As dev_has_feature() has been removed from iommu layer, IOMMU_DEV_FEAT_HWDBM is designed to be used through "enable" interface. --- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 4 ++++ include/linux/iommu.h | 1 + 2 files changed, 5 insertions(+) diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c index 696df51a3282..cd1627123e80 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -2722,6 +2722,8 @@ static bool arm_smmu_dev_has_feature(struct device *dev, switch (feat) { case IOMMU_DEV_FEAT_SVA: return arm_smmu_master_sva_supported(master); + case IOMMU_DEV_FEAT_HWDBM: + return !!(master->smmu->features & ARM_SMMU_FEAT_HD); default: return false; } @@ -2738,6 +2740,8 @@ static bool arm_smmu_dev_feature_enabled(struct device *dev, switch (feat) { case IOMMU_DEV_FEAT_SVA: return arm_smmu_master_sva_enabled(master); + case IOMMU_DEV_FEAT_HWDBM: + return arm_smmu_dev_has_feature(dev, feat); default: return false; } diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 4f7db5d23b23..88584a2d027c 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -160,6 +160,7 @@ struct iommu_resv_region { enum iommu_dev_features { IOMMU_DEV_FEAT_AUX, /* Aux-domain feature */ IOMMU_DEV_FEAT_SVA, /* Shared Virtual Addresses */ + IOMMU_DEV_FEAT_HWDBM, /* Hardware Dirty Bit Management */ }; #define IOMMU_PASID_INVALID (-1U) -- 2.19.1