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Wed, 11 Mar 2026 10:56:09 -0700 Date: Wed, 11 Mar 2026 10:56:07 -0700 From: Nicolin Chen To: Shameer Kolothum Thodi CC: "will@kernel.org" , "robin.murphy@arm.com" , Jason Gunthorpe , "joro@8bytes.org" , "praan@google.com" , Malak Marrid , "kees@kernel.org" , "Alexander.Grest@microsoft.com" , "baolu.lu@linux.intel.com" , "smostafa@google.com" , "linux-arm-kernel@lists.infradead.org" , "iommu@lists.linux.dev" , "linux-kernel@vger.kernel.org" Subject: Re: [PATCH RFTv1 3/3] iommu/arm-smmu-v3: Support PRI Page Request Message-ID: References: Precedence: bulk X-Mailing-List: iommu@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN2PEPF000044AA:EE_|SA1PR12MB9002:EE_ X-MS-Office365-Filtering-Correlation-Id: 4fda831e-dfe3-456a-b9b8-08de7f978838 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|82310400026|36860700016|7416014|376014|18002099003|56012099003|22082099003; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: h4yDVz7TZblAmixGGp/boXwQdJf8mqEybjqrfZWxPwheZ1+uUwjAGJf96b/asm4YfMGqr/pdRaqkVNRE7Badg3xm7kpPL9L9lwzyGuaV6f1q3NiFKQGuD8JWWoANFsPYAGy0NUCvTrLzzeS0Uf4I7jt3Mm3YNdYc+7uA9tLvpT7Gy1qj7jewRfPlL//N2AuVmxnLi0+/o7bC95olIDyj9jYdLoOgh3kEb4F9EA178M8o8hpM/ZvFhmrlH4gn2t9zq91jLR/V9gTgBo8Hncln6rSLm/pXsM2TE/kbys/iR/F3MkxV5jtRAQGeNF3ZTW3e6WAOKF7/u7ANBzAYbfxwAI9k/zYO/MY5jlaWB7XFvb1N+We3JoDozwqiMuaayf1uo1xafK4swsy1bw5HFPCHjaUVLBV8NCYnPfSnaaoG0SVbA/wkTpN+utexjx3j0MNl X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 11 Mar 2026 17:56:33.3516 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 4fda831e-dfe3-456a-b9b8-08de7f978838 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: BN2PEPF000044AA.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA1PR12MB9002 On Mon, Mar 09, 2026 at 04:04:31AM -0700, Shameer Kolothum Thodi wrote: > > Now, arm_smmu_page_response() can issue CMDQ_OP_PRI_RESP for page > > requests > > from the IOPF infrastructure. Decode the page requests from the PRI queue, > > and report it to the IOPF infrastructure. > > > > This fills the final piece for PRI support. > > Do we also need pci_reset_pri()/pci_enable_pri() to enable PRI on the > device side? > > Also, is there a check that the device advertises PCI PRI capability > before calling iopf_queue_add_device()? Yes and yes.. I will respin another version after a test. Thanks Nicolin