From patchwork Mon Aug 15 18:14:32 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicolin Chen X-Patchwork-Id: 12943946 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 250A6C282E7 for ; Mon, 15 Aug 2022 18:28:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:To :From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=9BM0dUAi1OJrAFKJjH0fmEM4drJEyyNi7IKpAsujGj8=; b=pT6+bmQs/oI48N 6/KN7DGpHqLF9HxX4r26nQi2jTtfNFGIm1J+j6uXoJn6Rax+0SR3tqeN5U3qgsdAQLzQEHpuxYvj3 ulf5uxLQMbdeuoLOTgYKklwi/MvnuPJyKa8B2xmnCjcPL0KKPwdPd2DXBsMEHnSKGj4dz5VvuyYC1 YRvw+9oo1iN2HlWQHUwgcEDIetpZiIjiVpw2VBSzwfd8OAYuQhC5GUBx3h9ma9y9Fm+0ZfgxpCEm5 Mo7wbvFKBZHhddD9qB7qJi2j8zwrdBnTE+J3jFfC/OsRyxXNgJoFY5MVMGhgMpg6yUOVLNC7o+ZhT b8GBbZU2uUkm0GrGhZ+Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oNenZ-003BJs-Ka; Mon, 15 Aug 2022 18:26:49 +0000 Received: from mail-dm6nam11on2065.outbound.protection.outlook.com ([40.107.223.65] helo=NAM11-DM6-obe.outbound.protection.outlook.com) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oNec5-002z7q-80 for linux-arm-kernel@lists.infradead.org; Mon, 15 Aug 2022 18:15:00 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=mqkZgVc0iVS84iQ0wNx8VhitoWC3aVTQnzAWMcS08Iu8Ox9bc1UeQp3x4W84Lufvp+mMnKV7SyHlW+RT/iLKBoHd4OYYQztbbRD7CBD6m3EczhiNzAROawXSYaCqNU2GTGVepzzeSUgbUxBKq2NcoOlS31Q4BRo0OthMFLtpPLdMGZCPp6YB/YwFbWdnBh9ylHHZD7zi8kSZZKs5b3pvBThubKBkaidbKmWAXkpOFhB4fgzmUs7LBi84hIZ5YPqW4lD37XkYb4b0aMSVrFDoiW7f8RNlSS5fqor2hEIaNMoksdgkXfLbSbLb3tWakcuo+lRpUPlHkjQ43t74gQt51g== 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-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=DBDOHqleZHVVamzDwdTTjmN2SJGMbpiPi41DSE4yMzI=; b=lj6IfPUt3+f3D9rser0zBKmZ8G1NhgxwK8sUGbJqQFHKQMNsENBRjuHaNWVMlgjHZh0OwzvV+kHe4u4VCZ7sVgAFpi+XuIFo6MFuA3gZIeecW6ldOx6C4mLA4MWLOm26/ry3hL9SA0PIH7fnHL5s+CQVqaclYyZQ3zsq+K/EqCwFIDeNDh5R9Y7EJk/OE8nSz63CejS08kJ6rKFVxaY86SH0gbhdkcS+itRtEUMkn0dHQ2YZ8CTCp888ONjq2Y229nk39nn5OC7Ai8T0pNiyPLrFVP6p411TkOiB98+F+EuIU4cRGDc10cigkT4t3zKdU9HnR9GFWb+ho0f8qRUOzg== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 12.22.5.234) smtp.rcpttodomain=rosenzweig.io smtp.mailfrom=nvidia.com; dmarc=pass (p=reject sp=reject 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=DBDOHqleZHVVamzDwdTTjmN2SJGMbpiPi41DSE4yMzI=; b=d8+21JOl6W/w0/y0IhtkqluiCg/E22RWOjjUBdNsu1xYfLPwHzPQDbPjnaTGO9jUBx4PIEPyeiXKzKYAcJJbMnfOv0bfLEvGmLBTTH5SPPFNL8xRKNd6pS8Na5H9yZwM0HT0OwYvJpMtK+NSxtUVzLMYwkf2pufj3efrbN4pKjkp4XU4+JbIZzLTS7UTKJOkwYf5VUJSV1ulNJZaJNavSZ76ldlLW/c+n1vnu2ztCAgSuIGEJIYBRckO/IwWVp+mcbitLznukbWkZ4TTctTIy1TcRDzOfUJoEdcvvAEOGCnrhLQdqTLvzuPKuj56a8cl7/tl29RzqJoW2qkOlGdFdQ== Received: from BN9PR03CA0284.namprd03.prod.outlook.com (2603:10b6:408:f5::19) by BYAPR12MB3175.namprd12.prod.outlook.com (2603:10b6:a03:13a::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5504.17; Mon, 15 Aug 2022 18:14:48 +0000 Received: from BN8NAM11FT087.eop-nam11.prod.protection.outlook.com (2603:10b6:408:f5:cafe::6f) by BN9PR03CA0284.outlook.office365.com (2603:10b6:408:f5::19) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5525.18 via Frontend Transport; Mon, 15 Aug 2022 18:14:48 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 12.22.5.234) smtp.mailfrom=nvidia.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=nvidia.com; Received-SPF: Pass (protection.outlook.com: domain of nvidia.com designates 12.22.5.234 as permitted sender) receiver=protection.outlook.com; client-ip=12.22.5.234; helo=mail.nvidia.com; pr=C Received: from mail.nvidia.com (12.22.5.234) by BN8NAM11FT087.mail.protection.outlook.com (10.13.177.24) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.20.5546.7 via Frontend Transport; Mon, 15 Aug 2022 18:14:48 +0000 Received: from drhqmail203.nvidia.com (10.126.190.182) by DRHQMAIL101.nvidia.com (10.27.9.10) with Microsoft SMTP Server (TLS) id 15.0.1497.38; Mon, 15 Aug 2022 18:14:46 +0000 Received: from drhqmail203.nvidia.com (10.126.190.182) by drhqmail203.nvidia.com (10.126.190.182) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.29; Mon, 15 Aug 2022 11:14:45 -0700 Received: from Asurada-Nvidia.nvidia.com (10.127.8.12) by mail.nvidia.com (10.126.190.182) with Microsoft SMTP Server id 15.2.986.29 via Frontend Transport; Mon, 15 Aug 2022 11:14:43 -0700 From: Nicolin Chen To: , , , Subject: [PATCH v6 0/5] Simplify vfio_iommu_type1 attach/detach routine Date: Mon, 15 Aug 2022 11:14:32 -0700 Message-ID: <20220815181437.28127-1-nicolinc@nvidia.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 42e74da4-a60f-4d27-abd2-08da7eea0a26 X-MS-TrafficTypeDiagnostic: BYAPR12MB3175:EE_ 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:12.22.5.234;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:InfoNoRecords;CAT:NONE;SFS:(13230016)(4636009)(136003)(346002)(376002)(39860400002)(396003)(46966006)(40470700004)(36840700001)(36756003)(86362001)(1076003)(426003)(336012)(186003)(47076005)(82740400003)(2616005)(356005)(81166007)(83380400001)(70206006)(70586007)(5660300002)(8936002)(7416002)(7406005)(4326008)(8676002)(966005)(40480700001)(82310400005)(2906002)(478600001)(36860700001)(40460700003)(6666004)(26005)(7696005)(41300700001)(316002)(54906003)(110136005)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 15 Aug 2022 18:14:48.2225 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 42e74da4-a60f-4d27-abd2-08da7eea0a26 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[12.22.5.234];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BN8NAM11FT087.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR12MB3175 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220815_111458_343726_03ECA4A8 X-CRM114-Status: GOOD ( 14.25 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: marcan@marcan.st, mjrosato@linux.ibm.com, virtualization@lists.linux-foundation.org, thierry.reding@gmail.com, alyssa@rosenzweig.io, jean-philippe@linaro.org, kvm@vger.kernel.org, zhang.lyra@gmail.com, jon@solid-run.com, jonathanh@nvidia.com, iommu@lists.linux.dev, jgg@nvidia.com, yangyingliang@huawei.com, orsonzhai@gmail.com, gerald.schaefer@linux.ibm.com, kevin.tian@intel.com, sven@svenpeter.dev, linux-arm-msm@vger.kernel.org, christophe.jaillet@wanadoo.fr, baolin.wang@linux.alibaba.com, thunder.leizhen@huawei.com, linux-tegra@vger.kernel.org, tglx@linutronix.de, linux-arm-kernel@lists.infradead.org, linux-s390@vger.kernel.org, cohuck@redhat.com, linux-kernel@vger.kernel.org, shameerali.kolothum.thodi@huawei.com, robdclark@gmail.com, asahi@lists.linux.dev, suravee.suthikulpanit@amd.com, dwmw2@infradead.org, baolu.lu@linux.intel.com Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org This is a preparatory series for IOMMUFD v2 patches. It enforces error code -EMEDIUMTYPE in iommu_attach_device() and iommu_attach_group() when an IOMMU domain and a device/group are incompatible. It also drops the useless domain->ops check since it won't fail in current environment. These allow VFIO iommu code to simplify its group attachment routine, by avoiding the extra IOMMU domain allocations and attach/detach sequences of the old code. Worths mentioning the exact match for enforce_cache_coherency is removed with this series, since there's very less value in doing that as KVM will not be able to take advantage of it -- this just wastes domain memory. Instead, we rely on Intel IOMMU driver taking care of that internally. This is on github: https://github.com/nicolinc/iommufd/commits/vfio_iommu_attach-v6 Changelog v6: * Rebased on top of v6.0-rc1 * Added "Reviewed-by" from Jason * Added "Cc" to Joerg/Will/Robin for the IOMMU patch v5: https://lore.kernel.org/kvm/20220701214455.14992-1-nicolinc@nvidia.com/ * Rebased on top of Robin's "Simplify bus_type determination". * Fixed a wrong change returning -EMEDIUMTYPE in arm-smmu driver. * Added Baolu's "Reviewed-by". v4: https://lore.kernel.org/kvm/20220630203635.33200-1-nicolinc@nvidia.com/ * Dropped -EMEDIUMTYPE change in mtk_v1 driver per Robin's input * Added Baolu's and Kevin's Reviewed-by lines v3: https://lore.kernel.org/kvm/20220623200029.26007-1-nicolinc@nvidia.com/ * Dropped all dev_err since -EMEDIUMTYPE clearly indicates what error. * Updated commit message of enforce_cache_coherency removing patch. * Updated commit message of domain->ops removing patch. * Replaced "goto out_unlock" with simply mutex_unlock() and return. * Added a line of comments for -EMEDIUMTYPE return check. * Moved iommu_get_msi_cookie() into alloc_attach_domain() as a cookie should be logically tied to the lifetime of a domain itself. * Added Kevin's "Reviewed-by". v2: https://lore.kernel.org/kvm/20220616000304.23890-1-nicolinc@nvidia.com/ * Added -EMEDIUMTYPE to more IOMMU drivers that fit the category. * Changed dev_err to dev_dbg for -EMEDIUMTYPE to avoid kernel log spam. * Dropped iommu_ops patch, and removed domain->ops in VFIO directly, since there's no mixed-driver use case that would fail the sanity. * Updated commit log of the patch removing enforce_cache_coherency. * Fixed a misplace of "num_non_pinned_groups--" in detach_group patch. * Moved "num_non_pinned_groups++" in PATCH-5 to the common path between domain-reusing and new-domain pathways, like the code previously did. * Fixed a typo in EMEDIUMTYPE patch. v1: https://lore.kernel.org/kvm/20220606061927.26049-1-nicolinc@nvidia.com/ Jason Gunthorpe (1): vfio/iommu_type1: Prefer to reuse domains vs match enforced cache coherency Nicolin Chen (4): iommu: Return -EMEDIUMTYPE for incompatible domain and device/group vfio/iommu_type1: Remove the domain->ops comparison vfio/iommu_type1: Clean up update_dirty_scope in detach_group() vfio/iommu_type1: Simplify group attachment drivers/iommu/amd/iommu.c | 2 +- drivers/iommu/apple-dart.c | 4 +- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 15 +- drivers/iommu/arm/arm-smmu/arm-smmu.c | 5 +- drivers/iommu/arm/arm-smmu/qcom_iommu.c | 9 +- drivers/iommu/intel/iommu.c | 10 +- drivers/iommu/iommu.c | 28 ++ drivers/iommu/ipmmu-vmsa.c | 4 +- drivers/iommu/omap-iommu.c | 3 +- drivers/iommu/s390-iommu.c | 2 +- drivers/iommu/sprd-iommu.c | 6 +- drivers/iommu/tegra-gart.c | 2 +- drivers/iommu/virtio-iommu.c | 3 +- drivers/vfio/vfio_iommu_type1.c | 353 ++++++++++---------- 14 files changed, 229 insertions(+), 217 deletions(-)