drm/amdkfd: Allow querying SVM attributes that are clear

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Currently the SVM get_attr call allows querying, which flags are set
in the entire address range. Add the opposite query, which flags are
clear in the entire address range. Both queries can be combined in a
single get_attr call, which allows answering questions such as, "is
this address range coherent, non-coherent, or a mix of both"?

Proposed userspace for UAPI:
https://github.com/RadeonOpenCompute/ROCR-Runtime/tree/memory_model_queries

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

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Felix Kuehling 2021-07-16 22:46:21 -04:00 • committed by Alex Deucher

parent ed7c28c771

commit a43e2a0e11

2 changed files with 22 additions and 13 deletions

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include/uapi/linux/kfd_ioctl.h

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