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Mon, 14 Apr 2025 21:58:07 -0700 From: Nicolin Chen To: , , CC: , , , , , , , , , , , , , , Subject: [PATCH v2 00/11] iommu/arm-smmu-v3: Allocate vmid per vsmmu instead of s2_parent Date: Mon, 14 Apr 2025 21:57:35 -0700 Message-ID: X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-NV-OnPremToCloud: AnonymousSubmission X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL02EPF00029927:EE_|CH3PR12MB7644:EE_ X-MS-Office365-Filtering-Correlation-Id: 13b7f93e-6a62-4ac2-d211-08dd7bda259b X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|82310400026|36860700013|376014|7416014|13003099007; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?P6D6SlpyrH9OcEbVCpBG+mDyKIa9ghC//xkbdy88Ht/SxRixSP+megBvxViU?= =?us-ascii?Q?68q53eETbIPEMPwlCoAnOx9acTSgGou+A6Lxht3mSlMv+uALS7PY3B9rLfnX?= =?us-ascii?Q?AkTL2WtQln54t9QGLjRm0DNlBixn/K+0zvzfy4COD8+aZ64IoZxc7BMSOl4Q?= =?us-ascii?Q?JQVuqBj0C08Wk2V71f/n2y6MTiprQu2KCe3bUrPAE/TU7NUi2HjloiskY664?= =?us-ascii?Q?Fa93KYTZW2SmnWmpwUQdzRqAsSobRW1J55jpAzlyftSDgBP5CZ1h2Qz3WHnL?= =?us-ascii?Q?i3B1TrdEOl+lbF8l2p8TPf644v1xY3Ric7vk5B3eF05L6ZzFHrA/1nhsw6g7?= =?us-ascii?Q?IMRvWoVvtB4rSuWXjURXnh0agiDAcnDbwZRjWEXHI+YCLjkvZ5E17yDu6pWi?= =?us-ascii?Q?SElp6TYWn7AdBYu/Te4iBkPiKhruBlcHMYmc7P4ZRUT8F6rRgIMYvS596BxY?= =?us-ascii?Q?nZ7NWYsJOh9oTJYGUKkom+ScWIAlrZte/x3/YZW6LjunhCRYFR14Y+xBLHO/?= =?us-ascii?Q?r5hLTZexpnGnvUY9Ywy8A/AvheiPSfgjn6Ok//p+DP6ZCDt9PcaRNjhvvnQ1?= =?us-ascii?Q?2mkp+F6g5NHvYwAkhGTToYh2Qrc12NyXk915i9gUO/ieuS25alOAyhZLWZPT?= =?us-ascii?Q?a188HHZBfV0GJ9YlAayLQ/pAbAPVA7zO7rPIFEhKMBwTZZk0Ec9iMtORg3X+?= =?us-ascii?Q?dQ0N5ywzizkeq0tcnrAWE7jxpry9eNUO++HxgN8NIHswpaqQ9VxGSHpUuvvB?= =?us-ascii?Q?McqDIsOfUh57ek9VuPKs2+DeA9EF9TqWgeIBtGdocICFam8Zv0wqqflnCrJs?= =?us-ascii?Q?BndKENOfYkPWpIuJjViD6E/hcav3QscOZJcD3MbxezlUuOwiEMePqWjuyHAo?= =?us-ascii?Q?NKEJaf9OT2bxby9IkdCbIkBZVbacRI/HtfCBTWaYqmhF3KKCch+YETwASUb/?= =?us-ascii?Q?y3qpceQEr3IjqOLQAUH+iiEUpcsOzmWqxUdUaGnzKkkyf3GlVHQmr9MHCZij?= =?us-ascii?Q?+C5WMzeURf7rbgvxGLt0Ab28Un5OIC3kieK8dBMgksYd5W/Q/A90VbjLcO9G?= =?us-ascii?Q?NOKM5xZHQWMyBPERh8iy33rn8pQuFoQFQkiNMG9X9BXqmcp6zMogay6zvXDB?= =?us-ascii?Q?Ju6A6ZaBl6lHrUrGlKPX7T+HPfxX6IV5yNsa6PRQyT0mo3hUyx1LAzGxPjW+?= =?us-ascii?Q?/C0/TtCTB4FcgJ62w5zXPPTg7/D+e02vWg9rWzdkb56dfoogj2X7xDTf4IC+?= =?us-ascii?Q?d/GiE0ehGIPb1/8zOPb+0hp5y7RtfwnR/8c6AHRiCNelOA+adgCWutJNHvtO?= =?us-ascii?Q?aJKj2qIuLmkgTS0Rz3tj4C7edtTORrZI8ep/QAZKJBLNCntqhPfP0AxzOcl+?= =?us-ascii?Q?l5QXQAjiN9uD3Zp3m6SRlvfWs9M8iS3h/Fwkf1ztexbFaORSlRGORRlEGzwP?= =?us-ascii?Q?bt5JNWf5rnQj7vzDwnbOBkek6eBQuuq/avZZyB05o1+n8TFMU1vEH0fweyP6?= =?us-ascii?Q?ZSzp3SONv5QpETEP5mwDEL73gm/ZoLKl/LWseQf5Ufhqh+9v4Gud33Ku2w?= =?us-ascii?Q?=3D=3D?= X-Forefront-Antispam-Report: CIP:216.228.117.161;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge2.nvidia.com;CAT:NONE;SFS:(13230040)(1800799024)(82310400026)(36860700013)(376014)(7416014)(13003099007);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 15 Apr 2025 04:58:21.8659 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 13b7f93e-6a62-4ac2-d211-08dd7bda259b X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.161];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BL02EPF00029927.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH3PR12MB7644 With a system having multiple SMMU physical instances, multiple vSMMUs can be allocated for a VM that deivces behind different SMMUs are assigned to. In such a use case, the IPA->PA mappings (i.e. the stage-2 I/O page table) can be shared across the vSMMU instances. With a shareable S2 parent domain, it is more natural to store a vmid per vSMMU instance v.s. a shared S2 domain, since each physical SMMU instance maintains its own vmid bitmap. Have a few patches to get the functions ready for the vmid migration. And decouple the vmid from S2 parent domains and move its allocation to vSMMU instances. Note that a regular S2 domain (!nest_parent) has to retain the s2_cfg and vmid for non-nesting use cases, if the SMMU HW doesn't support stage 1. Maintain a per-S2-domain vsmmus list and a per-vSMMU ats_devices list to iterate for S2 cache invalidation cmds and ATC invalidation cmds. This is on Github: https://github.com/nicolinc/iommufd/commits/smmuv3_vmid-v2 Changelog v2 * Add Reviewed-by from Jason and Pranjal * Add WARN_ON_ONCE(!vmid) in arm_smmu_make_s2_domain_ste() * Add arm_smmu_s2_parent_can_share() for a compatibility check * Introduce arm_smmu_s2_parent_tlb_inv_* helpers replacing the non-nesting routines * Introduce arm_vsmmu_atc_inv_domain() using a per-vSMMU ats_devices list, replacing the nested_ats_flush in struct arm_smmu_master_domain v1 https://lore.kernel.org/all/cover.1741150594.git.nicolinc@nvidia.com/ Thanks Nicolin Nicolin Chen (11): iommu/arm-smmu-v3: Pass in vmid to arm_smmu_make_s2_domain_ste() iommu/arm-smmu-v3: Pass in smmu/iommu_domain to __arm_smmu_tlb_inv_range() iommu/arm-smmu-v3: Share cmdq/cmd helpers with arm-smmu-v3-iommufd iommu/arm-smmu-v3: Add an inline arm_smmu_tlb_inv_vmid helper iommu/arm-smmu-v3: Rename arm_smmu_attach_prepare_vmaster iommu/arm-smmu-v3: Introduce arm_smmu_s2_parent_tlb_ invalidation helpers iommu/arm-smmu-v3: Introduce arm_vsmmu_atc_inv_domain() iommu/arm-smmu-v3: Use vSMMU helpers for S2 and ATC invalidations iommu/arm-smmu-v3: Clean up nested_ats_flush from master_domain iommu/arm-smmu-v3: Decouple vmid from S2 nest_parent domain iommu/arm-smmu-v3: Allow to share S2 nest_parent domain across vSMMUs drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 77 +++++++- .../arm/arm-smmu-v3/arm-smmu-v3-iommufd.c | 175 ++++++++++++++++-- .../iommu/arm/arm-smmu-v3/arm-smmu-v3-test.c | 3 +- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 139 +++++++------- 4 files changed, 297 insertions(+), 97 deletions(-) -- 2.43.0