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Thu, 23 Jun 2022 13:01:27 -0700 From: Nicolin Chen To: , , , , , , , , , , , , , , Subject: [PATCH v3 0/5] Simplify vfio_iommu_type1 attach/detach routine Date: Thu, 23 Jun 2022 13:00:24 -0700 Message-ID: <20220623200029.26007-1-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: 76548f47-483f-43be-535a-08da55532af8 X-MS-TrafficTypeDiagnostic: SN1PR12MB2525:EE_ X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: XbHupQRekQ/jWGmhFPXbCar4gKVjHlyVGsmHEQU069ocuou0rvok7c1jeLWcDZYn/bVfp7lgf6EqZDB88kQ66QzuGskMXIX3cDOHIJ3gggjC0FMubLyF5xHqmZhWk0hZnleTbgUzhk/zkpUBkJFOLdvwwFTEFtBnwljKp8K5y529//PEKyMQuxiDXb0fBz72ktufTP7OLpEASCcNbq54sv50Ui/L5pBQCdl/veDhE0xAdETckvAgzBGq65QM4VZZNQxbPJcRidbv1MZ4H5BpjDwlLGLPBhfHDnz2MPZyDUxGmmfTxPaRUBF1IgO05NrXnYWNsGj09jL3mRGEt5TTThh6rZcoTJEeWenTbEI7olDCW/7buNYCQNAIJmtzvEtGHM0RCsC7Xuma1VPXyNKPy1iQceJFPpyhD0wq8sf8SUIDU6xkWAx7HOzF8hnzU2NZzK5d/Tf8Wai0QgrTe1eIv4IACaeAp0zg7/tzkUiy3P6atov25Yxlg8Fuc8V58VlP0FkgUaAwAHJa5MvVjL88RG17eSo77M2kEvJIrgOJV0znUWQ9vGCmyPhU7PzKn13IstacxU73hQo6lBCCNJzoRtm81oF+WzQaSOCKzJDvA99hRXp8sWocOteVZYMOTuUuYLgCnAM70o6MIufiLweZRqpi0xWKP3cJTDkDwQYdjNTh+S1XCKry7P7P4zC2ZhBzoUns/IW1WZDW5jRTER+bTnY6I90ndhEfzG55FJRdnKmIQeNFmpra15QHnRL0Ip7Y/Cifdjk9nQTel9FsajEyzxFTbzX2NMnZgRcK7V9E4PaphTISG/tbLWR4ipDi2HUhMD3Waegc2RhjdEaAige8tqpkoqM2mePVV60Qwn+/1d0JIc9f7hNEBcEsgpL6pdN8TM6nM/CKPAXZg73II45c31ccUP8AaBfEjJDH2xZ8sB8+q4vGn1qVxLuQ2JXBP5UjtGAyQD8HeDVqjlglitoUi9XdDPR2AcQnrpljXAIH7cLp7ZGbhESni0slS+qiI3BCbKgYReew7Xen/K4UKHUqdA== X-Forefront-Antispam-Report: CIP:12.22.5.235;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:InfoNoRecords;CAT:NONE;SFS:(13230016)(4636009)(346002)(136003)(39860400002)(396003)(376002)(46966006)(36840700001)(40470700004)(316002)(966005)(54906003)(8676002)(70206006)(186003)(356005)(40480700001)(4326008)(41300700001)(36756003)(8936002)(81166007)(2906002)(86362001)(7416002)(5660300002)(2616005)(26005)(478600001)(7696005)(110136005)(921005)(82740400003)(1076003)(7406005)(336012)(36860700001)(82310400005)(6666004)(426003)(70586007)(83380400001)(40460700003)(47076005)(83996005)(2101003)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 23 Jun 2022 20:01:31.6191 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 76548f47-483f-43be-535a-08da55532af8 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[12.22.5.235];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BN8NAM11FT049.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN1PR12MB2525 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220623_130136_370509_E41CF6D7 X-CRM114-Status: GOOD ( 12.96 ) 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: mjrosato@linux.ibm.com, jordan@cosmicpenguin.net, thierry.reding@gmail.com, alyssa@rosenzweig.io, linux-s390@vger.kernel.org, kvm@vger.kernel.org, jonathanh@nvidia.com, yong.wu@mediatek.com, yangyingliang@huawei.com, gerald.schaefer@linux.ibm.com, linux-arm-msm@vger.kernel.org, john.garry@huawei.com, christophe.jaillet@wanadoo.fr, thunder.leizhen@huawei.com, linux-tegra@vger.kernel.org, tglx@linutronix.de, virtualization@lists.linux-foundation.org, linux-arm-kernel@lists.infradead.org, chenxiang66@hisilicon.com, cohuck@redhat.com, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, suravee.suthikulpanit@amd.com, linux-mediatek@lists.infradead.org, dwmw2@infradead.org 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 since KVM won't 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 Changelog v3: * 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 | 6 +- 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/mtk_iommu_v1.c | 2 +- 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 | 340 ++++++++++---------- 15 files changed, 225 insertions(+), 211 deletions(-)