1. A computer program product for providing access to adapters in a computing environment, the computer program product comprising: a computer readable storage medium readable by a processing circuit and storing instructions for execution by the processing circuit for performing a method comprising: executing a guest instruction comprising a request to access an adapter; determining whether the guest instruction is permitted to directly access the adapter; responsive to being permitted, the execution directly accessing one or more address spaces of the adapter without host intervention; and responsive to not being permitted, the execution causing an intercept to a host operating system.