During runtime, the PCD drivers will automatically return a default SKU value if no specific SKU value was specified after a platform driver calls SetSku(). The configuration elements, PCDs, must be accessed using either Dynamic or DynamicEx PCD access methods. When building and image that supports multiple SKUs, the Feature Flag, Fixed At Build and Patchable In Module PCDs will only use the default SKU configuration settings. The default configuration settings are identified by PCD section tags that have either a Default SKUID modifier or have not SKUID modifier. The set of SKUs that can be included is configurable either through setting the list in the DSC file
SKU_IDENTIFIER element or through setting one or more -x SKUID command-line options to the build command.