In accordance with embodiments of the present disclosure, an information handling system may include a host system and a management controller. The host system may include a host system processor and a device coupled to the host system processor. The management controller may be communicatively coupled to the host system processor and configured to provide management of the information handling system and manage multiple functions instantiated on the device via a single sideband interface channel interfaced between the device and the management controller by communicating function-oriented sideband commands, each function-oriented sideband command including a function address field for setting forth a function of the multiple functions to which the function-oriented sideband command is addressed.