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Fri, 30 May 2025 09:33:24 -0700 Date: Fri, 30 May 2025 09:33:22 -0700 From: Nicolin Chen To: Jason Gunthorpe CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: Re: [PATCH v5 13/29] iommufd/viommu: Introduce IOMMUFD_OBJ_HW_QUEUE and its related struct Message-ID: References: <580a36f629402506d232052ddd20ef21ec91d5bc.1747537752.git.nicolinc@nvidia.com> <20250530160753.GD233377@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20250530160753.GD233377@nvidia.com> X-NV-OnPremToCloud: AnonymousSubmission X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL02EPF00021F69:EE_|DS7PR12MB6213:EE_ X-MS-Office365-Filtering-Correlation-Id: 971459bd-305d-4aad-521a-08dd9f97be01 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700013|1800799024|376014|7416014|82310400026; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?Xlx3rYtVjVfKXn5WJ7JReyocbTSMsGg8Q18F9IdgEweMrU4rGiOW/xgmIiBR?= =?us-ascii?Q?uDeKb4e0vkx7W9DkH5111U/RfeeahShnbLXBbfzUANJmHAKWKQjRk3t3qdJ/?= =?us-ascii?Q?eT2Kuzhi/qgpBCFor23huITxZiPLiLQ8GZDieccU0d3HcIjWXRYsmGZIzbWn?= =?us-ascii?Q?bIPT6YiYnkNrEJOWyCpIkM6t4oqPpEjX+bOkO2pQf6SqVK7fziIKkv+P59XZ?= =?us-ascii?Q?/0qnOcwNdS2dcs0FbY7hPrxq4gPdwlggtR0P6gLiidrOmM+La7uAduqxDnWE?= =?us-ascii?Q?eetLk/jq0ZUX0yhbHPaQu+1F6WRyeB0rI9ftCGPrJ83+Jr94rPfocT0x9uff?= =?us-ascii?Q?SdGzsfFATGTKxViTy+CtXFLlXvsOGT1zYvfF68gD4mOMvf8gktXTQoHKMOIZ?= =?us-ascii?Q?Ycu0HcSO9GAExFEIKSzbDXqoEyY2M2ilqjxkNGRkGnjRojY9aX/yGNIq9ONq?= =?us-ascii?Q?W37BTBYbWrGLVGEeTCHOsR4y/PkQ9ZMLxuHitBjFCroTCCo7KlIOCbIAjXLs?= =?us-ascii?Q?przWqbqGXQMoupunF8/2WSxyOlRTBkNgVUgh5+tmRapVR/NYn41T/DDbvnd8?= =?us-ascii?Q?eYaaOnnfg38+27dm8ERvolBl/y9mV0ULjX286thOTmnf3mZt+twq5TC3TFr2?= =?us-ascii?Q?IJTacg2YSFB6vxLwG+9MfDn5ZT+iXd81oVX58IWiwFPUsjF+NH8kxOo8fU6d?= =?us-ascii?Q?CdgMzVJH5xcIRqlvtl1l12dpqzKuGpu9/DNXATCcSA+s/5zgE9Priw25hwPd?= =?us-ascii?Q?cBGrarEiR2bE1K8oIyVKQLgfbptBcKYlULNcJP0hW9IipLd/PIM5LIxGbXVf?= =?us-ascii?Q?bA/BeJpTFDpGHJXRfJDKwFPkipsdk7eESTzoRM7SUT3i/qGRekoIn9ypgf0P?= =?us-ascii?Q?awoiz7di4rm6ALSnPORQ5ADIdZ4gN1yySiOLi5LfVckzudzsyC4kSzADER58?= =?us-ascii?Q?CataoVo+15Kuyj+UzSDsll9XIAgV2RtXH5st4xeKCZzMLOg+dg7nXD6e5WrE?= =?us-ascii?Q?vj2L2Y2uOwvtzpSpaNLuv3n1OPtyHRSxrCahqolfuPChNo45hr2Z7W0eGAXr?= =?us-ascii?Q?HF7U8ZGOpwIMDaZ04+a4ISbPtm72yvAd1f4369K8f7ryrgrUMkBS9Kub1Kw6?= =?us-ascii?Q?GyLc6KZUOYmym1O5MbvOa0DKgodlFTaxCKrZ1/96t2VcdSG+O0S5FXnUMnb+?= =?us-ascii?Q?x6CMrs16IInL2U4Hzd+vdZQ5yJh+uC5q+y6A8MsQhYHRYvlhysPGgVejSjgw?= =?us-ascii?Q?IgVPIlPly86CXBjNSnp7hMpAYFAC/MnIqC+437tniRcWEefWUGIDOmtgDv+T?= =?us-ascii?Q?+e1CsHajBxUv/2ZxxE56hpqyEFziZjTSweV5Mdt/gvj186JZGCcLwdN4tSNP?= =?us-ascii?Q?xjIC/qvyg5NSwUmP6dvPs1prNTJpz32GmM7pGGgwZgGZbxmyEGjQfIyoYL1n?= =?us-ascii?Q?kTHdiTteJfqzCseujNauI3r6ImPPVfIAew8mfXzJ0+MCQFX0CTD/zOOZSoSU?= =?us-ascii?Q?HD9euaws04hCQh1laVINtyhPzNiwoabdx+tK?= 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)(36860700013)(1800799024)(376014)(7416014)(82310400026);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 30 May 2025 16:33:43.1022 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 971459bd-305d-4aad-521a-08dd9f97be01 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: BL02EPF00021F69.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS7PR12MB6213 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250530_093353_973668_1E4341CC X-CRM114-Status: GOOD ( 13.00 ) 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: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Fri, May 30, 2025 at 01:07:53PM -0300, Jason Gunthorpe wrote: > On Sat, May 17, 2025 at 08:21:30PM -0700, Nicolin Chen wrote: > > struct iommufd_viommu_ops { > > + u32 flags; > > void (*destroy)(struct iommufd_viommu *viommu); > > struct iommu_domain *(*alloc_domain_nested)( > > struct iommufd_viommu *viommu, u32 flags, > > @@ -171,6 +200,10 @@ struct iommufd_viommu_ops { > > struct device *dev, > > u64 virt_id); > > void (*vdevice_destroy)(struct iommufd_vdevice *vdev); > > + struct iommufd_hw_queue *(*hw_queue_alloc)( > > + struct iommufd_ucmd *ucmd, struct iommufd_viommu *viommu, > > + unsigned int type, u32 index, u64 base_addr, size_t length); > > I think it would better to have two function pointers here than the flags: > > + struct iommufd_hw_queue *(*hw_queue_alloc)( > + struct iommufd_ucmd *ucmd, struct iommufd_viommu *viommu, > + unsigned int type, u32 index, u64 s2_iova, size_t length); > > > + struct iommufd_hw_queue *(*hw_queue_alloc_phys)( > + struct iommufd_ucmd *ucmd, struct iommufd_viommu *viommu, > + unsigned int type, u32 index, phys_addr_t phys, size_t length); OK. I think these two should be exclusive then. Maybe it needs a WARN_ON in iommufd_viommu_alloc. Thanks Nicolin