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Fri, 4 Sep 2026 14:54:24 -0500 From: Xiaogang.Chen To: CC: Xiaogang Chen Subject: [PATCH v2 0/4] drm/amdkfd: Enable device private memory THP support in kfd svm driver Date: Fri, 4 Sep 2026 14:54:17 -0500 Message-ID: <20260904195421.42919-1-xiaogang.chen@amd.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: LV8PEPF00000066:EE_|SJ2PR12MB8832:EE_ X-MS-Office365-Filtering-Correlation-Id: 255bf899-634b-4eeb-b9ba-08df0abe529d X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; ARA:13230040|36860700016|23010399003|82310400026|376014|1800799024|10067099003|11063799006|56012099006|18002099003; X-Microsoft-Antispam-Message-Info: /AgbgdRUtMLuGXcMxt7Y8iARagKpXfjgr+BmXo/lYbpSPFGUqneIhtTNuNeF7mRxBTLw+Udx1H0sPGlGACAQYOr3sz+mA8pJLuHgtVVvZWKuUzuHhhoE5AZuI+iNA0yGzwNNxpyHEMTBUGMEPUmGWuiWqUyS2sPPm8XJhEcytpZCBQqEmbpDCc37cd0utYR7mrD31Y1gf2sT1Zy6SxaZDyPpyOiLJstW2D/enQLF6w38bFgWfrX25fPDU80cTnHd2+0fLvM1oLnyFIk6IEhFF46XarUk575gls46EORMAwZgTM4deAC2k5E8Ihv+Tm2tTke6xTpy1UtydKL6thO75bMQRDNV/Fp9ZKGhUWUR8ZPo0mLqabdGvpUULOzTzGiatD7r+HKof3O5LwV05nOQZY/C7TpXsDbJ36DH9/dawEGjQyvwHg9w9nu3t3MYDo7FD1FPZhuty2AaGp1WU01wMnFJqpyItlm86NHqLO7UnGvc5nX+BT8rBx+AHY5ncbOhYKH1GfeupcIEPZRmjI2U0v4D8li4RqukIRl7MdpMxG95esldWkokS3ZoWEr/fU+M0fKnbkkWjBIJyFm/B+9VBiuoxsuS2ecSanZctVsNdx+QP89hw4kNF9LYERQfaEcJn66b9v81UU0L7KriflZ8G4NeHMM1frw+mGCmGhNLBMvQ7eafz+WEC8Cg++39KdSfg28qBXO/H3HJ9S0WYL6FWQ== X-Forefront-Antispam-Report: CIP:165.204.84.17; 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Ip=[165.204.84.17]; Helo=[satlexmb07.amd.com] X-MS-Exchange-CrossTenant-AuthSource: LV8PEPF00000066.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ2PR12MB8832 X-BeenThere: amd-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Discussion list for AMD gfx List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: amd-gfx-bounces@lists.freedesktop.org Sender: "amd-gfx" From: Xiaogang Chen Use following work of device-private THP support [1] in kfd driver to add 2MB/THP support in migration. The implementation enables efficient migration of large folios between system memory and device-private memory. [1]https://lore.kernel.org/linux-mm/20251001065707.920170-1-balbirs@nvidia.com/ v2: - Reset is_large each 4K page iteration - Unmap the THP DMA mapping once as DMA mapping, at its real size - Leave migrate->dst[i] zero when the source is not migrating - Count THP migrations as HPAGE_PMD_NR pages in prange->vram_pages - Implement folio_split and hold one svm_bo ref per subpage Xiaogang Chen (4): drm/amdkfd: Add awareness of THP of device and system RAM in kfd svm driver drm/amdkfd: Change migration size in CPU/GPU page fault handler to THP size drm/amdkfd: Apply HMM THP zone device-private memory migration in kfd driver drm/amdkfd: Apply AMDGPU_PTE_FRAG to pte of gart page table for THP mapping drivers/gpu/drm/amd/amdkfd/kfd_migrate.c | 348 ++++++++++++++++++----- drivers/gpu/drm/amd/amdkfd/kfd_svm.c | 28 +- drivers/gpu/drm/amd/amdkfd/kfd_svm.h | 13 + 3 files changed, 315 insertions(+), 74 deletions(-) -- 2.34.1