8.2 Firmware Volumes
Stage VI enables advanced features. There is a container FV for adding advanced features:
Which yields this example extension of the flash map for MMIO storage (append to Stage I-Stage V map):
The modules that constitute a particular feature are not required to be contained within a single firmware volume and this might especially be the case in systems with limited flash storage capacity which could be impacted by firmware volume alignment requirements.
The PEI core will create a FV HOB for each child firmware volume such that each DXE firmware volume is exposed to the DXE dispatcher.