drm/xe: Bump prefetch BO LRU for already-valid ranges

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A valid prefetch range skips migration and binding, so nothing refreshes
its backing BOs on the LRU. Add xe_svm_range_prefetch_lru_bump(), which
re-faults with no_dma_map and bumps each backing BO, and call it on the
valid path.

v2
- Make function failsafe (Matt/Sashiko AI comment)
- Add stub for function

Suggested-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Link: https://patch.msgid.link/20261001033602.3166274-10-himal.prasad.ghimiray@intel.com
Signed-off-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

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Himal Prasad Ghimiray 2026-10-01 09:06:07 +05:30 • committed by Rodrigo Vivi

parent 508444b9f6

commit fdfed8609d

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34

drivers/gpu/drm/xe/xe_svm.c

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11

drivers/gpu/drm/xe/xe_svm.h

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5

drivers/gpu/drm/xe/xe_vm.c

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