Updating programmable logic devices (‘PLDs’) in a symmetric multiprocessing (‘SMP’) computer, each compute node of the SMP computer including a PLD coupled for data communications through a bus adapter, the bus adapter adapted for data communications through a set of one or more input/output (‘I/O’) memory addresses, including configuring the primary compute node with an update of the configuration instructions for the PLDs; assigning, by the PLDs at boot time in an SMP boot, a unique, separate set of one or more I/O addresses to each bus adapter on each compute node; and providing, by the primary compute node during the SMP boot, the update to all compute nodes, writing the update as a data transfer to each of the PLDs through each bus adapter at the unique, separate set of one or more I/O addresses for each bus adapter.