accel/amdxdna: Fix unsafe use of handle_mm_fault()

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handle_mm_fault() must not be called from the mmap callback because
the VMA has not yet been linked. The handle_mm_fault() API contract
assumes that the VMA is already linked.

Remove the handle_mm_fault() call from the mmap callback. For imported
BOs, mark the mapping as invalid and rely on the first command submission
to fault in the pages.

For shmem BOs, set the VM_MIXEDMAP flag and use vm_insert_pages().
Implement amdxdna_gem_mixed_vm_ops to handle the page faults.

Fixes: e486147c91 ("accel/amdxdna: Add BO import and export")
Reviewed-by: Max Zhen <max.zhen@amd.com>
Signed-off-by: Lizhi Hou <lizhi.hou@amd.com>
Link: https://patch.msgid.link/20260910211338.1102315-1-lizhi.hou@amd.com

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This commit is contained in:

Lizhi Hou 2026-09-10 14:13:38 -07:00

parent 1bc13a9d93

commit df4d535206

1 changed files with 118 additions and 33 deletions

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drivers/accel/amdxdna/amdxdna_gem.c

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