drm/amdkfd: handle CPU fault on COW mapping

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If CPU page fault in a page with zone_device_data svm_bo from another
process, that means it is COW mapping in the child process and the
range is migrated to VRAM by parent process. Migrate the parent
process range back to system memory to recover the CPU page fault.

Signed-off-by: Philip Yang <Philip.Yang@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Philip Yang 2022-09-07 12:30:12 -04:00 • committed by Alex Deucher

parent 7a3f8b7c4c

commit e1f84eef31

1 changed files with 29 additions and 13 deletions

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drivers/gpu/drm/amd/amdkfd/kfd_migrate.c

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