1. An information handling system comprising: a processor; a storage resource communicatively coupled to the processor; and a basic input/output system (BIOS) comprising a program of instructions executable by the processor and configured to cause the processor to initialize one or more information handling resources of the information handling system, wherein the BIOS is further configured to: during runtime of an operating system: receive an input/output request from the operating system to access a system partition instantiated on the storage resource; authenticate the input/output request; and responsive to authenticating the input/output request, provide a runtime service of the BIOS to complete the input/output request to the system partition; and prior to runtime of the operating system, add a new entry in a configuration table of runtime services of the BIOS during a boot-device selection phase of a boot of the information handling system, the new entry comprising a plurality of authenticated runtime services including the runtime service.