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=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 3FB90C43214 for ; Tue, 31 Aug 2021 03:07:50 +0000 (UTC) Received: from smtp3.osuosl.org (smtp3.osuosl.org [140.211.166.136]) (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 29DDA61039 for ; Tue, 31 Aug 2021 03:07:49 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 29DDA61039 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lists.linux-foundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by smtp3.osuosl.org (Postfix) with ESMTP id 42DC760B94; Tue, 31 Aug 2021 03:07:48 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp3.osuosl.org ([127.0.0.1]) by localhost (smtp3.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id KlJjnxUmCClJ; Tue, 31 Aug 2021 03:07:44 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [IPv6:2605:bc80:3010:104::8cd3:938]) by smtp3.osuosl.org (Postfix) with ESMTPS id EA7D260BA0; Tue, 31 Aug 2021 03:07:43 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 712A3C0024; Tue, 31 Aug 2021 03:07:43 +0000 (UTC) Received: from smtp3.osuosl.org (smtp3.osuosl.org [140.211.166.136]) by lists.linuxfoundation.org (Postfix) with ESMTP id E8549C001A for ; Tue, 31 Aug 2021 03:07:39 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp3.osuosl.org (Postfix) with ESMTP id C3C4460B94 for ; Tue, 31 Aug 2021 03:07:39 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp3.osuosl.org ([127.0.0.1]) by localhost (smtp3.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id JaRksOwgcMlc for ; Tue, 31 Aug 2021 03:07:36 +0000 (UTC) X-Greylist: whitelisted by SQLgrey-1.8.0 Received: from NAM10-MW2-obe.outbound.protection.outlook.com (mail-mw2nam10on2067.outbound.protection.outlook.com [40.107.94.67]) by smtp3.osuosl.org (Postfix) with ESMTPS id EE95A60B97 for ; Tue, 31 Aug 2021 03:07:35 +0000 (UTC) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=Kq4Eg3QQR/y80Wnl1YFQq3uw0w1BERxc9J16Wdjre5aliTxUHChXnFq6PMGzt7PSm3x/c7AdNq0qki2wgiDZaLPeCHl4cK8FANHCxhJpFWHDwtfDGtowsxxRvAqgiommj4fknS7cMzxC5kKQnP5qYlQfRD0qvZzo6GVC7bClMHvvRT8pD8nyBGZg+FlDl6JQE0UatTVi4ZMlP4qE1jp7OtZBBHIKiMCSAx98bt7MdiZPPoOwv9R286zpBWwOqGT6dvetT2Irdd2p8VAB5zFE/f9rDdnrOwqyr3z+01HfUxQKdlvpQAHwPPW1t5Fn1sb0bGCqcsYw2bep+EulOqCAwQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=hRoWwVZ0qFjyy84HJrH7KnAp6D0Tim4zu0pbGXeP1U0=; b=Li60Y9CyWh/dEtAnKkr2VUjBYMIVNrvAGhJHq3U+l6XtcylsTWoni2Vhv8qV3MV20zuK8KkJfhYAilitr4pQ16uH9fx9JXV0/BvmtETkDcDSCfW/NwEYO3ki1vvrNTt0NWMY2Ye4WamBjRwq5oqcYwIMFLVIsYbhBpKiWTUOG14AZuMSnNU6WcQQP7U+HhCp6IEBNgR54R4Rqhk6YtDiLVFXcdtliKhkq8h10vPSWdzm0ia4NXmqD/upW8/XltbaifrV9M+THjOEBtH0exApdP3HGYelU2JTbSt8M5wU4Wz5mcMigiYbCrFJynAtFK5u0cNwlLkcUGlTwjN9Sq+lJA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 216.228.112.35) smtp.rcpttodomain=huawei.com smtp.mailfrom=nvidia.com; dmarc=pass (p=quarantine sp=none pct=100) action=none header.from=nvidia.com; dkim=none (message not signed); arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=Nvidia.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=hRoWwVZ0qFjyy84HJrH7KnAp6D0Tim4zu0pbGXeP1U0=; b=W4sUj1v/EGdu4mFXeCmwT6kFEFSxezJkRhm3n8Si5M1Ukl0ZpOmcQJUCZ5KsG2Hi622ySIAkAS4xhRwc2xKf+LXEfM+uPxmhE+LoWd1QCCJovZM95G2Z8ZWT3XXemzt3ZHihfpTfRlRmc6mnTmHzECl/iBpr2UwCFIJlNF1y0QaVf2Vf9YIQCtNffLhUUPjbmGdb7KLIswKHgL0kx17KtvZoKdpAzfb2bKRsXj3T3T2O7frY524M3i2e7qN9w+9x7gUqZMfFxYptH1h4WIBgMEFP2PBAk+goYvZ6C+HsA0SpHjAvuuD3hTfRF7VKzVhwXSmtmngyOSd6IGrZCCExsA== Received: from BN9P222CA0015.NAMP222.PROD.OUTLOOK.COM (2603:10b6:408:10c::20) by SN6PR12MB4717.namprd12.prod.outlook.com (2603:10b6:805:e2::31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4457.24; Tue, 31 Aug 2021 03:07:31 +0000 Received: from BN8NAM11FT025.eop-nam11.prod.protection.outlook.com (2603:10b6:408:10c:cafe::c) by BN9P222CA0015.outlook.office365.com (2603:10b6:408:10c::20) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4457.20 via Frontend Transport; Tue, 31 Aug 2021 03:07:31 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 216.228.112.35) smtp.mailfrom=nvidia.com; huawei.com; dkim=none (message not signed) header.d=none;huawei.com; dmarc=pass action=none header.from=nvidia.com; Received-SPF: Pass (protection.outlook.com: domain of nvidia.com designates 216.228.112.35 as permitted sender) receiver=protection.outlook.com; client-ip=216.228.112.35; helo=mail.nvidia.com; Received: from mail.nvidia.com (216.228.112.35) by BN8NAM11FT025.mail.protection.outlook.com (10.13.177.136) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.20.4457.17 via Frontend Transport; Tue, 31 Aug 2021 03:07:30 +0000 Received: from HQMAIL101.nvidia.com (172.20.187.10) by HQMAIL111.nvidia.com (172.20.187.18) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 31 Aug 2021 03:07:30 +0000 Received: from Asurada-Nvidia.nvidia.com (172.20.187.5) by mail.nvidia.com (172.20.187.10) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Tue, 31 Aug 2021 03:07:30 +0000 To: , , , , , Subject: [RFC][PATCH v2 01/13] iommu: Add set_nesting_vmid/get_nesting_vmid functions Date: Mon, 30 Aug 2021 19:59:11 -0700 Message-ID: <20210831025923.15812-2-nicolinc@nvidia.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210831025923.15812-1-nicolinc@nvidia.com> References: <20210831025923.15812-1-nicolinc@nvidia.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 4956911e-727e-44dc-3606-08d96c2c78cc X-MS-TrafficTypeDiagnostic: SN6PR12MB4717: X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:5516; X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.112.35; CTRY:US; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:mail.nvidia.com; PTR:schybrid04.nvidia.com; CAT:NONE; SFS:(4636009)(39860400002)(346002)(376002)(136003)(396003)(46966006)(36840700001)(5660300002)(36860700001)(336012)(426003)(2906002)(1076003)(83380400001)(186003)(2616005)(82740400003)(36756003)(86362001)(7696005)(478600001)(7636003)(82310400003)(8676002)(356005)(36906005)(26005)(54906003)(316002)(70206006)(7416002)(6666004)(110136005)(70586007)(47076005)(8936002)(4326008)(2101003); DIR:OUT; SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 31 Aug 2021 03:07:30.8986 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 4956911e-727e-44dc-3606-08d96c2c78cc X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a; Ip=[216.228.112.35]; Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BN8NAM11FT025.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN6PR12MB4717 Cc: jean-philippe@linaro.org, kvm@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, thierry.reding@gmail.com, linux-tegra@vger.kernel.org, linux-arm-kernel@lists.infradead.org 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: , From: Nicolin Chen via iommu Reply-To: Nicolin Chen Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" VMID stands for Virtual Machine Identifier, being used to tag TLB entries to indicate which VM they belong to. This is used by some IOMMU like SMMUv3 for virtualization case, in nesting mode. So this patch adds a pair of new iommu_ops callback functions with a pair of exported set/get functions to allow VFIO core to get access of the VMID value in an IOMMU driver. Signed-off-by: Nicolin Chen --- drivers/iommu/iommu.c | 20 ++++++++++++++++++++ include/linux/iommu.h | 5 +++++ 2 files changed, 25 insertions(+) diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 3303d707bab4..051f2df36dc0 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -2774,6 +2774,26 @@ int iommu_enable_nesting(struct iommu_domain *domain) } EXPORT_SYMBOL_GPL(iommu_enable_nesting); +int iommu_set_nesting_vmid(struct iommu_domain *domain, u32 vmid) +{ + if (domain->type != IOMMU_DOMAIN_UNMANAGED) + return -EINVAL; + if (!domain->ops->set_nesting_vmid) + return -EINVAL; + return domain->ops->set_nesting_vmid(domain, vmid); +} +EXPORT_SYMBOL_GPL(iommu_set_nesting_vmid); + +int iommu_get_nesting_vmid(struct iommu_domain *domain, u32 *vmid) +{ + if (domain->type != IOMMU_DOMAIN_UNMANAGED) + return -EINVAL; + if (!domain->ops->get_nesting_vmid) + return -EINVAL; + return domain->ops->get_nesting_vmid(domain, vmid); +} +EXPORT_SYMBOL_GPL(iommu_get_nesting_vmid); + int iommu_set_pgtable_quirks(struct iommu_domain *domain, unsigned long quirk) { diff --git a/include/linux/iommu.h b/include/linux/iommu.h index d2f3435e7d17..bda6b3450909 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -163,6 +163,7 @@ enum iommu_dev_features { }; #define IOMMU_PASID_INVALID (-1U) +#define IOMMU_VMID_INVALID (-1U) #ifdef CONFIG_IOMMU_API @@ -269,6 +270,8 @@ struct iommu_ops { void (*probe_finalize)(struct device *dev); struct iommu_group *(*device_group)(struct device *dev); int (*enable_nesting)(struct iommu_domain *domain); + int (*set_nesting_vmid)(struct iommu_domain *domain, u32 vmid); + int (*get_nesting_vmid)(struct iommu_domain *domain, u32 *vmid); int (*set_pgtable_quirks)(struct iommu_domain *domain, unsigned long quirks); @@ -500,6 +503,8 @@ extern int iommu_group_id(struct iommu_group *group); extern struct iommu_domain *iommu_group_default_domain(struct iommu_group *); int iommu_enable_nesting(struct iommu_domain *domain); +int iommu_set_nesting_vmid(struct iommu_domain *domain, u32 vmid); +int iommu_get_nesting_vmid(struct iommu_domain *domain, u32 *vmid); int iommu_set_pgtable_quirks(struct iommu_domain *domain, unsigned long quirks); -- 2.17.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu