To allow RenderMan to control your geometry settings, these can be found in the RenderMan tab inside the RenderGeometrySettings LOP
(RfH needs to be installed)

Choose "Set or Create" or "Set if Exists" to create or change an opinion on the geometry attribute or choose "Block" to disable previous opinions on the attribute.   All available parameters are listed but none are set by default.

These are the same settings that can be found in the RenderMan spare parameter tab on object nodes.