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Wed, 13 Aug 2025 18:26:02 -0700 From: Nicolin Chen To: , , CC: , , , , , , , , , , , , Subject: [PATCH rfcv1 2/8] iommu/arm-smmu-v3: Explicitly set smmu_domain->stage for SVA Date: Wed, 13 Aug 2025 18:25:33 -0700 Message-ID: <826a71630caef33effbd82d918e7f7393fb4d377.1755131672.git.nicolinc@nvidia.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN2PEPF000044A2:EE_|SJ0PR12MB7460:EE_ X-MS-Office365-Filtering-Correlation-Id: ef4e2337-2481-4c55-d84f-08dddad191c1 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|36860700013|82310400026|7416014|376014; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?Dg5a5askZmfSFLaUsasf03aqwwAvgxQ/OvGhkeAg6FVDpBTy0CKzoWv0ZqrF?= =?us-ascii?Q?wkbmk5zGSnDfQl4mswdGhnnmmAp+xc6AxoTvwx/fZHsjqN0eP2sYKlhDDwg4?= =?us-ascii?Q?mlYYD+fHIsFNM8xprHaqUrqf7bJdl2q+uw1oAdUZ1AL5UE5h8flIzbm1AIfc?= =?us-ascii?Q?8omLcfFFnnRYIDBZ7LxqoYMr+LJW3ubo6uyrmdBszQVTztOVorS95KgtH2Ii?= =?us-ascii?Q?shARMf6t7WNArF3ySeAZlZUQ42ugpLHpYmBeMjfjCqQ6z3xkUZkqaVv9LLIM?= =?us-ascii?Q?sW4IIoEs6NSPPEalBaBxmocu6k43f0TpfMKMpFmOr2eIu1w7wPzb29zuQ1C2?= =?us-ascii?Q?e0HpstyaYFoSa+BZ3qDdFYlTSLVm3t/9+qC/MDQHpbGukxdl2f77Cg9ZM6H3?= =?us-ascii?Q?nPDxiKle05AvWniUek4txbuswot0WKRoSbDkMbGjDcfMJFio6AIW2DSj306Z?= =?us-ascii?Q?kYViOeVW9YSS2Hle3kNlLTaTobsUOYqrwHbZ2RsosTkJNzNGy2kDqHtIctPj?= =?us-ascii?Q?yqHXRit1Mo/tGapR25j/UhU/mI1U/wATlOIXukqzScUH+KTFRRPfVlbL50nm?= =?us-ascii?Q?3k6fcDT3qFDch6RuIOKkpzV+026tyQ6xkwMhuXL1t4t3V2n1iYlBc8c4wydg?= =?us-ascii?Q?57S9A8/3lBsa/efqYC+SDUhkX2U0GD8XtmJB+sfAgmJe0ixPPxRWROsDepRh?= =?us-ascii?Q?q37A1nXbk26k/7kVn3KouwOc2xgYODQi7vjFKsCpGvvk9UdaWB0TyBPO8mT2?= =?us-ascii?Q?00LH7omWnS34ymDyyohsh8pjcOS5XV1IuV61u5ocisGbzD7zSadA+OAfCaXC?= =?us-ascii?Q?yy70BiCH1Aq7hAs+cEzaZeoQH/YuStMb9x5dphuytpcX8M/byBCLErgTLcqs?= =?us-ascii?Q?mSjP7qJqXoTx3R3ve8ZCQNR0Zv0FSeJ1IQfSxxVdTaZHZ17UKXd+A/0yvJfs?= =?us-ascii?Q?cRmKYJTYAmeEPFqlb9OnWbvleGqovMrjIxpK0ZL9oNsmbfWI0eadReHW8KIN?= =?us-ascii?Q?0EA557Kxo0vKZ2Wk7WvTv0YUQEvhaQ3/49r/J2jAmAjkqe8yIc5bwelstC2J?= =?us-ascii?Q?YM/jfQjw+uaCln8/Dy1Mp7WRGymXJio2pRmpEoynDjcg2MfLEchJFdys4lPR?= =?us-ascii?Q?ARA1eOldrd1IgHemEPfMFr177hCFz8qJdO4AVCT+Y49QMiBDlXKuRE2T7W9N?= =?us-ascii?Q?ZjyXSoIEy/H+s9nwahR7eqFxekO8GBHPg/twBFvWTzrisDoYFGuAqZclLgo0?= =?us-ascii?Q?j1m/oqsWINgQ+1BJzBCoJWdfYzhoU2BbINW6L8eu9s9tnVBwr5yaCxhqZyV6?= =?us-ascii?Q?znpwz3qy65zqWgYE6jdN9Bh2rz/buTSnn8lsza0rhFsPBxoEWjNrcEmZie6R?= =?us-ascii?Q?fOmxnGW5HW1yZhARwVqoz/igUCU+a+F8ffXMolw5bayQVI6LA2nCf3DB7ZRc?= =?us-ascii?Q?Td5LRg5txzQlHG3YckwJ+hLhHFdnCaGf1PFvVxeG6uCyKmzKohuRf4kzuu45?= =?us-ascii?Q?xJKbbMBTHgu4sNg6dfkleNxDC1DAOHlrWtBW?= X-Forefront-Antispam-Report: CIP:216.228.117.160;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge1.nvidia.com;CAT:NONE;SFS:(13230040)(1800799024)(36860700013)(82310400026)(7416014)(376014);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 14 Aug 2025 01:26:18.2814 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: ef4e2337-2481-4c55-d84f-08dddad191c1 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BN2PEPF000044A2.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ0PR12MB7460 Content-Type: text/plain; charset="utf-8" Both the ARM_SMMU_DOMAIN_S1 case and the SVA case use ASID, requiring ASID based invalidation commands to flush the TLB. Define an ARM_SMMU_DOMAIN_SVA to make the SVA case clear to share the same path with the ARM_SMMU_DOMAIN_S1 case, which will be a part of the routine to build a new per-domain invalidation array. There is no function change. Suggested-by: Jason Gunthorpe Signed-off-by: Nicolin Chen --- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 1 + drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c | 1 + drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 3 +++ 3 files changed, 5 insertions(+) diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h b/drivers/iommu/ar= m/arm-smmu-v3/arm-smmu-v3.h index ae23aacc38402..5c0b38595d209 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h @@ -858,6 +858,7 @@ struct arm_smmu_master { enum arm_smmu_domain_stage { ARM_SMMU_DOMAIN_S1 =3D 0, ARM_SMMU_DOMAIN_S2, + ARM_SMMU_DOMAIN_SVA, }; =20 struct arm_smmu_domain { diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c b/drivers/iomm= u/arm/arm-smmu-v3/arm-smmu-v3-sva.c index 59a480974d80f..6097f1f540d87 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c @@ -346,6 +346,7 @@ struct iommu_domain *arm_smmu_sva_domain_alloc(struct d= evice *dev, * ARM_SMMU_FEAT_RANGE_INV is present */ smmu_domain->domain.pgsize_bitmap =3D PAGE_SIZE; + smmu_domain->stage =3D ARM_SMMU_DOMAIN_SVA; smmu_domain->smmu =3D smmu; =20 ret =3D xa_alloc(&arm_smmu_asid_xa, &asid, smmu_domain, diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/ar= m/arm-smmu-v3/arm-smmu-v3.c index cccf8f52ee0d5..0016ec699acfe 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -3070,6 +3070,9 @@ static int arm_smmu_attach_dev(struct iommu_domain *d= omain, struct device *dev) arm_smmu_install_ste_for_dev(master, &target); arm_smmu_clear_cd(master, IOMMU_NO_PASID); break; + default: + WARN_ON(true); + break; } =20 arm_smmu_attach_commit(&state); --=20 2.43.0