Version 2 of GPU SVM has been promoted to the proper series from an RFC. Thanks to everyone (especially Sima and Thomas) for their numerous reviews on revision 1 and for helping to address many design issues. This version has been tested with IGT [1] on PVC, BMG, and LNL. Major changes in v2: - Dropped mmap write abuse - core MM locking and retry loops instead of driver locking to avoid races - Removed physical to virtual references - Embedded structure/ops for drm_gpusvm_devmem - Fixed mremap and fork issues - Added DRM pagemap - Included RFC documentation in the kernel doc Known issues in v2: - gpusvm/pagemap is still located in the Xe directory; it can be moved to the drm directory in the next revision, but will remain in Xe for streamlined testing for now - drm_gpusvm_range_evict looks up VMA; it may be possible to use hmm_range_fault here instead, with some minor tweaks to HMM Matt [1] https://patchwork.freedesktop.org/series/137545/#rev3 Matthew Brost (26): drm/xe: Retry BO allocation mm/migrate: Add migrate_device_prepopulated_range mm/migrate: Trylock device page in do_swap_page drm/gpusvm: Add support for GPU Shared Virtual Memory drm/xe/uapi: Add DRM_XE_VM_BIND_FLAG_SYSTEM_ALLOCATON flag drm/xe: Add SVM init / close / fini to faulting VMs drm/xe: Add SVM range invalidation drm/gpuvm: Add DRM_GPUVA_OP_USER drm/xe: Add (re)bind to SVM page fault handler drm/xe: Add SVM garbage collector drm/xe: Add unbind to SVM garbage collector drm/xe: Do not allow system allocator VMA unbind if the GPU has bindings drm/xe: Enable system allocator uAPI drm/xe: Add migrate layer functions for SVM support drm/xe: Add SVM device memory mirroring drm/xe: Add drm_gpusvm_devmem to xe_bo drm/xe: Add GPUSVM devic memory copy vfunc functions drm/xe: Add Xe SVM populate_devmem_pfn vfunc drm/xe: Add Xe SVM devmem_release vfunc drm/xe: Add BO flags required for SVM drm/xe: Add SVM VRAM migration drm/xe: Basic SVM BO eviction drm/xe: Add SVM debug drm/xe: Add modparam for SVM notifier size drm/xe: Add always_migrate_to_vram modparam drm/doc: gpusvm: Add GPU SVM documentation Thomas Hellström (3): drm/pagemap: Add DRM pagemap drm/xe: Add dma_addr res cursor drm/xe: Add drm_pagemap ops to SVM Documentation/gpu/rfc/gpusvm.rst | 70 + Documentation/gpu/rfc/index.rst | 4 + drivers/gpu/drm/xe/Makefile | 4 +- drivers/gpu/drm/xe/drm_gpusvm.c | 2074 ++++++++++++++++++++++++++ drivers/gpu/drm/xe/drm_gpusvm.h | 447 ++++++ drivers/gpu/drm/xe/drm_pagemap.h | 103 ++ drivers/gpu/drm/xe/xe_bo.c | 43 +- drivers/gpu/drm/xe/xe_bo.h | 2 + drivers/gpu/drm/xe/xe_bo_types.h | 5 + drivers/gpu/drm/xe/xe_device_types.h | 15 + drivers/gpu/drm/xe/xe_gt_pagefault.c | 17 +- drivers/gpu/drm/xe/xe_migrate.c | 149 ++ drivers/gpu/drm/xe/xe_migrate.h | 10 + drivers/gpu/drm/xe/xe_module.c | 7 + drivers/gpu/drm/xe/xe_module.h | 2 + drivers/gpu/drm/xe/xe_pt.c | 362 ++++- drivers/gpu/drm/xe/xe_pt.h | 3 + drivers/gpu/drm/xe/xe_pt_types.h | 2 + drivers/gpu/drm/xe/xe_res_cursor.h | 116 +- drivers/gpu/drm/xe/xe_svm.c | 840 +++++++++++ drivers/gpu/drm/xe/xe_svm.h | 60 + drivers/gpu/drm/xe/xe_tile.c | 5 + drivers/gpu/drm/xe/xe_vm.c | 286 +++- drivers/gpu/drm/xe/xe_vm.h | 15 +- drivers/gpu/drm/xe/xe_vm_types.h | 44 + include/drm/drm_gpuvm.h | 5 + include/linux/migrate.h | 1 + include/uapi/drm/xe_drm.h | 19 +- mm/memory.c | 13 +- mm/migrate_device.c | 104 +- 30 files changed, 4695 insertions(+), 132 deletions(-) create mode 100644 Documentation/gpu/rfc/gpusvm.rst create mode 100644 drivers/gpu/drm/xe/drm_gpusvm.c create mode 100644 drivers/gpu/drm/xe/drm_gpusvm.h create mode 100644 drivers/gpu/drm/xe/drm_pagemap.h create mode 100644 drivers/gpu/drm/xe/xe_svm.c create mode 100644 drivers/gpu/drm/xe/xe_svm.h -- 2.34.1
