1. A computer-implemented method, comprising: detecting a peripheral component interconnect host bridge; determining that a slot coupled to the peripheral component interconnect host bridge is occupied by an input/output adapter; determining one or more characteristics of the input/output adapter; determining whether the input/output adapter is capable of using additional address translation table memory based on the one or more characteristics of the input/output adapter; and allocating the additional address translation table memory for the input/output adapter in response to determining that the input/output adapter is capable of using the additional address translation table memory.