vhdl-compose-configuration-hierarchical

vhdl-compose-configuration-hierarchical is a variable defined in `vhdl-mode.el'.
Its value is

t

Documentation:
Specifies whether hierarchical configurations should be created.
If non-nil, automatically created configurations are hierarchical and include
the whole hierarchy of subcomponents. Otherwise the configuration only
includes one level of subcomponents.

You can customize this variable.