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charset=UTF-8 Date: Mon, 02 Mar 2026 21:04:07 +0900 Message-Id: From: "Alexandre Courbot" To: "Joel Fernandes" Cc: , "Miguel Ojeda" , "Boqun Feng" , "Gary Guo" , =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= , "Benno Lossin" , "Andreas Hindborg" , "Alice Ryhl" , "Trevor Gross" , "Danilo Krummrich" , "Dave Airlie" , "Daniel Almeida" , "Koen Koning" , , , , "Nikola Djukic" , "Maarten Lankhorst" , "Maxime Ripard" , "Simona Vetter" , "Jonathan Corbet" , "Alex Deucher" , =?utf-8?q?Christian_K=C3=B6nig?= , "Jani Nikula" , "Joonas Lahtinen" , "Rodrigo Vivi" , "Tvrtko Ursulin" , "Huang Rui" , "Matthew Auld" , "Matthew Brost" , "Lucas De Marchi" , =?utf-8?q?Thomas_Hellstr=C3=B6m?= , "Helge Deller" , "Alex Gaynor" , "Boqun Feng" , "Alistair Popple" , "Andrea Righi" , "Zhi Wang" , "Philipp Stanner" , "Elle Rhumsaa" , , "Eliot Courtney" , , , , , , Subject: Re: [PATCH v8 25/25] gpu: nova-core: mm: Add PRAMIN aperture self-tests References: <20260224225323.3312204-1-joelagnelf@nvidia.com> <20260224225323.3312204-26-joelagnelf@nvidia.com> In-Reply-To: <20260224225323.3312204-26-joelagnelf@nvidia.com> X-ClientProxiedBy: TY4PR01CA0107.jpnprd01.prod.outlook.com (2603:1096:405:378::15) To CH2PR12MB3990.namprd12.prod.outlook.com (2603:10b6:610:28::18) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH2PR12MB3990:EE_|CY5PR12MB6083:EE_ X-MS-Office365-Filtering-Correlation-Id: dc491496-bbaf-4e2e-1bf3-08de7853d093 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|7416014|10070799003|1800799024|366016; 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> + > + // PRAMIN support is only for MMU v2 for now (Turing/Ampere/Ada). > + if mmu_version !=3D MmuVersion::V2 { Why is that? I thought PRAMIN was also working on Hopper+. Isn't it orthogonal to the kind of MMU used? > + dev_info!( > + dev, > + "PRAMIN: Skipping self-tests for MMU {:?} (only V2 supported= )\n", > + mmu_version > + ); > + return Ok(()); > + } > + > + dev_info!(dev, "PRAMIN: Starting self-test...\n"); > + > + let pramin =3D Arc::pin_init(Pramin::new(bar)?, GFP_KERNEL)?; > + let mut win =3D pramin.window()?; > + > + // Use offset 0x1000 as test area. > + let base: usize =3D 0x1000; > + > + // Test 1: Read/write at byte-aligned locations. Let's split each test into its own function for readability.