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Sun, 5 Jun 2022 23:19:49 -0700 From: Nicolin Chen To: , , , , , , , , , , , , , , , , , , , , , CC: , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH 0/5] Simplify vfio_iommu_type1 attach/detach routine Date: Sun, 5 Jun 2022 23:19:22 -0700 Message-ID: <20220606061927.26049-1-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: 398b826b-ed06-426d-5c5f-08da47849165 X-MS-TrafficTypeDiagnostic: DM6PR12MB2890:EE_ X-Microsoft-Antispam-PRVS: 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:12.22.5.236;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:InfoNoRecords;CAT:NONE;SFS:(13230001)(4636009)(40470700004)(36840700001)(46966006)(336012)(47076005)(1076003)(2616005)(426003)(36756003)(7416002)(6666004)(83380400001)(966005)(186003)(7696005)(36860700001)(26005)(81166007)(110136005)(40460700003)(8936002)(921005)(356005)(316002)(82310400005)(4326008)(508600001)(86362001)(8676002)(5660300002)(54906003)(70206006)(70586007)(2906002)(7406005)(83996005)(2101003)(36900700001);DIR:OUT;SFP:1101; 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X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=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 moves the domain->ops check into __iommu_attach_device(). 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 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 iommu: Ensure device has the same iommu_ops as the domain vfio/iommu_type1: Clean up update_dirty_scope in detach_group() vfio/iommu_type1: Simplify group attachment drivers/iommu/amd/iommu.c | 3 +- drivers/iommu/apple-dart.c | 5 +- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 7 +- drivers/iommu/arm/arm-smmu/arm-smmu.c | 1 + drivers/iommu/arm/arm-smmu/qcom_iommu.c | 3 +- drivers/iommu/exynos-iommu.c | 1 + drivers/iommu/fsl_pamu_domain.c | 1 + drivers/iommu/intel/iommu.c | 5 +- drivers/iommu/iommu.c | 26 ++ drivers/iommu/ipmmu-vmsa.c | 3 +- drivers/iommu/msm_iommu.c | 1 + drivers/iommu/mtk_iommu.c | 1 + drivers/iommu/mtk_iommu_v1.c | 1 + drivers/iommu/omap-iommu.c | 3 +- drivers/iommu/rockchip-iommu.c | 1 + drivers/iommu/s390-iommu.c | 1 + drivers/iommu/sprd-iommu.c | 1 + drivers/iommu/sun50i-iommu.c | 1 + drivers/iommu/tegra-gart.c | 1 + drivers/iommu/tegra-smmu.c | 1 + drivers/iommu/virtio-iommu.c | 3 +- drivers/vfio/vfio_iommu_type1.c | 315 ++++++++++---------- include/linux/iommu.h | 2 + 23 files changed, 223 insertions(+), 164 deletions(-)