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=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 F1F1BC433E0 for ; Wed, 10 Mar 2021 09:07:04 +0000 (UTC) Received: from smtp2.osuosl.org (smtp2.osuosl.org [140.211.166.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 7909964FFC for ; Wed, 10 Mar 2021 09:07:04 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7909964FFC Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by smtp2.osuosl.org (Postfix) with ESMTP id 1B338431AE; Wed, 10 Mar 2021 09:07:04 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp2.osuosl.org ([127.0.0.1]) by localhost (smtp2.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ljVwV-38oF9E; Wed, 10 Mar 2021 09:07:03 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by smtp2.osuosl.org (Postfix) with ESMTP id DDBBE431B1; Wed, 10 Mar 2021 09:07:02 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id EE734C001D; Wed, 10 Mar 2021 09:07:01 +0000 (UTC) Received: from smtp1.osuosl.org (smtp1.osuosl.org [IPv6:2605:bc80:3010::138]) by lists.linuxfoundation.org (Postfix) with ESMTP id 05D82C0001 for ; Wed, 10 Mar 2021 09:07:00 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp1.osuosl.org (Postfix) with ESMTP id A910B842F1 for ; Wed, 10 Mar 2021 09:06:57 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp1.osuosl.org ([127.0.0.1]) by localhost (smtp1.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 7jfubtX0Bl71 for ; Wed, 10 Mar 2021 09:06:57 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.8.0 Received: from szxga05-in.huawei.com (szxga05-in.huawei.com [45.249.212.191]) by smtp1.osuosl.org (Postfix) with ESMTPS id 6FC9D8435E for ; Wed, 10 Mar 2021 09:06:56 +0000 (UTC) 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 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 X-Originating-IP: [10.174.184.42] X-CFilter-Loop: Reflected Cc: Mark Rutland , jiangkunkun@huawei.com, Suzuki K Poulose , Marc Zyngier , Cornelia Huck , lushenming@huawei.com, Kirti Wankhede , James Morse , Catalin Marinas , wanghaibin.wang@huawei.com X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" 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 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu