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Tue, 24 Feb 2026 22:53:34 +0000 Received: from DS0PR12MB6486.namprd12.prod.outlook.com ([fe80::88a9:f314:c95f:8b33]) by DS0PR12MB6486.namprd12.prod.outlook.com ([fe80::88a9:f314:c95f:8b33%4]) with mapi id 15.20.9632.017; Tue, 24 Feb 2026 22:53:34 +0000 From: Joel Fernandes To: linux-kernel@vger.kernel.org Cc: Miguel Ojeda , Boqun Feng , Gary Guo , =?UTF-8?q?Bj=C3=B6rn=20Roy=20Baron?= , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross , Danilo Krummrich , Dave Airlie , Daniel Almeida , Koen Koning , dri-devel@lists.freedesktop.org, nouveau@lists.freedesktop.org, rust-for-linux@vger.kernel.org, Nikola Djukic , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Jonathan Corbet , Alex Deucher , =?UTF-8?q?Christian=20K=C3=B6nig?= , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Tvrtko Ursulin , Huang Rui , Matthew Auld , Matthew Brost , Lucas De Marchi , =?UTF-8?q?Thomas=20Hellstr=C3=B6m?= , Helge Deller , Alex Gaynor , Boqun Feng , John Hubbard , Alistair Popple , Timur Tabi , Edwin Peer , Alexandre Courbot , Andrea Righi , Andy Ritger , Zhi Wang , Balbir Singh , Philipp Stanner , Elle Rhumsaa , alexeyi@nvidia.com, Eliot Courtney , joel@joelfernandes.org, linux-doc@vger.kernel.org, amd-gfx@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, intel-xe@lists.freedesktop.org, linux-fbdev@vger.kernel.org, Joel Fernandes Subject: [PATCH v8 00/25] gpu: nova-core: Add memory management support Date: Tue, 24 Feb 2026 17:52:58 -0500 Message-Id: <20260224225323.3312204-1-joelagnelf@nvidia.com> X-Mailer: git-send-email 2.34.1 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: BL0PR02CA0068.namprd02.prod.outlook.com (2603:10b6:207:3d::45) To DS0PR12MB6486.namprd12.prod.outlook.com (2603:10b6:8:c5::21) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS0PR12MB6486:EE_|CY8PR12MB7562:EE_ X-MS-Office365-Filtering-Correlation-Id: 9307053d-3c97-4464-9399-08de73f78983 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|7416014|376014|1800799024|366016; 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These are critical for channel management, vGPU, and all other memory management uses of nova-core. Changes from v7 to v8: - Incorporated "Select GPU_BUDDY for VRAM allocation" patch from the dependency series (Alex). - Significant patch reordering for better logical flow (GSP/FB patches moved earlier, page table patches, Vmm, Bar1, tests) (Alex). - Replaced several 'as' usages with into_safe_cast() (Danilo, Alex). - Updated BAR 1 test cases to include exercising the block size API (Eliot, Danilo). Changes from v6 to v7: - Addressed DMA fence signalling usecase per Danilo's feedback. Pre v6: - Simplified PRAMIN code (John Hubbard, Alex Courbot). - Handled different MMU versions: ver2 versus ver3 (John Hubbard). - Added BAR1 usecase so we have user of DRM Buddy / VMM (John Hubbard). - Iterating over clist/buddy bindings. All patches, along with all the dependencies (including CList), can be found at: https://git.kernel.org/pub/scm/linux/kernel/git/jfern/linux.git (branch nova/mm) Link to v7: https://lore.kernel.org/all/20260218212020.800836-1-joelagnelf@nvidia.com/ Joel Fernandes (25): gpu: nova-core: Select GPU_BUDDY for VRAM allocation gpu: nova-core: Kconfig: Sort select statements alphabetically gpu: nova-core: gsp: Return GspStaticInfo and FbLayout from boot() gpu: nova-core: gsp: Extract usable FB region from GSP gpu: nova-core: fb: Add usable_vram field to FbLayout gpu: nova-core: mm: Add support to use PRAMIN windows to write to VRAM docs: gpu: nova-core: Document the PRAMIN aperture mechanism gpu: nova-core: mm: Add common memory management types gpu: nova-core: mm: Add TLB flush support gpu: nova-core: mm: Add GpuMm centralized memory manager gpu: nova-core: mm: Use usable VRAM region for buddy allocator gpu: nova-core: mm: Add common types for all page table formats gpu: nova-core: mm: Add MMU v2 page table types gpu: nova-core: mm: Add MMU v3 page table types gpu: nova-core: mm: Add unified page table entry wrapper enums gpu: nova-core: mm: Add page table walker for MMU v2/v3 gpu: nova-core: mm: Add Virtual Memory Manager gpu: nova-core: mm: Add virtual address range tracking to VMM gpu: nova-core: mm: Add multi-page mapping API to VMM gpu: nova-core: Add BAR1 aperture type and size constant gpu: nova-core: gsp: Add BAR1 PDE base accessors gpu: nova-core: mm: Add BAR1 user interface gpu: nova-core: mm: Add BarUser to struct Gpu and create at boot gpu: nova-core: mm: Add BAR1 memory management self-tests gpu: nova-core: mm: Add PRAMIN aperture self-tests Documentation/gpu/nova/core/pramin.rst | 125 ++++++ Documentation/gpu/nova/index.rst | 1 + drivers/gpu/nova-core/Kconfig | 13 +- drivers/gpu/nova-core/driver.rs | 9 +- drivers/gpu/nova-core/fb.rs | 26 +- drivers/gpu/nova-core/gpu.rs | 130 +++++- drivers/gpu/nova-core/gsp/boot.rs | 22 +- drivers/gpu/nova-core/gsp/commands.rs | 18 +- drivers/gpu/nova-core/gsp/fw/commands.rs | 40 ++ drivers/gpu/nova-core/mm.rs | 245 ++++++++++ drivers/gpu/nova-core/mm/bar_user.rs | 406 +++++++++++++++++ drivers/gpu/nova-core/mm/pagetable.rs | 453 +++++++++++++++++++ drivers/gpu/nova-core/mm/pagetable/ver2.rs | 199 +++++++++ drivers/gpu/nova-core/mm/pagetable/ver3.rs | 302 +++++++++++++ drivers/gpu/nova-core/mm/pagetable/walk.rs | 218 +++++++++ drivers/gpu/nova-core/mm/pramin.rs | 453 +++++++++++++++++++ drivers/gpu/nova-core/mm/tlb.rs | 90 ++++ drivers/gpu/nova-core/mm/vmm.rs | 494 +++++++++++++++++++++ drivers/gpu/nova-core/nova_core.rs | 1 + drivers/gpu/nova-core/regs.rs | 38 ++ 20 files changed, 3273 insertions(+), 10 deletions(-) create mode 100644 Documentation/gpu/nova/core/pramin.rst create mode 100644 drivers/gpu/nova-core/mm.rs create mode 100644 drivers/gpu/nova-core/mm/bar_user.rs create mode 100644 drivers/gpu/nova-core/mm/pagetable.rs create mode 100644 drivers/gpu/nova-core/mm/pagetable/ver2.rs create mode 100644 drivers/gpu/nova-core/mm/pagetable/ver3.rs create mode 100644 drivers/gpu/nova-core/mm/pagetable/walk.rs create mode 100644 drivers/gpu/nova-core/mm/pramin.rs create mode 100644 drivers/gpu/nova-core/mm/tlb.rs create mode 100644 drivers/gpu/nova-core/mm/vmm.rs base-commit: 2961f841b025fb234860bac26dfb7fa7cb0fb122 prerequisite-patch-id: f8778e0b72697243cfe40a8bfcc3ca1d66160b12 prerequisite-patch-id: 763b30c69f9806de97eb58bc8e3406feb6bf61b4 prerequisite-patch-id: 2cded1a588520cf7d08f51bf5b3646d5b3dc26bd prerequisite-patch-id: 4933d6b86caab3e4630c92292cfe8e9d3b8f3524 prerequisite-patch-id: 9f58738611f42a330b00bd976fbcafe2b7e6d75e prerequisite-patch-id: 07f81850399af27b61dcba81ad1bb24bcf977ac1 -- 2.34.1