Define a partition in Quartus for a block that includes tranceivers

I am trying to use design partition in Quartus. I lock down a block after it has satisfied the timing constraints. Since the block includes transceivers I get an error indicating it should be on the root partition. Is there any way to lock the root partition i.e. set the reservation level to 'final'? How can we use partition for blocks that use transceivers or other peripherals?