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56fc40aba4
get_atc_vmid_pasid_mapping_valid() is very similar to get_atc_vmid_pasid_mapping_pasid(), so they can be merged into a new function get_atc_vmid_pasid_mapping_info() to reduce register access times. More importantly, getting the PASID and the valid bit atomically with a single read fixes some potential race conditions where the mapping changes between the two reads. Signed-off-by: Yong Zhao <Yong.Zhao@amd.com> Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> |
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