FwKeyHobPei

Overview

FwKeyHobPei locates firmware key FFS files by GUID, extracts their raw data sections, and builds GUID-extension HOBs to pass the key material to DXE-phase drivers. The keys are identified by a table of GUIDs stored in the .data section. This PEIM runs during early PEI to ensure cryptographic key material is available before DXE drivers that require it execute.

Key Functions

• Memset -- Zero-memory utility wrapping standard memset.
• Memcpy -- Memory copy with overlap-safe backward copy handling.
• SetMem32 -- 32-bit aligned memory set operation.
• PeiServicesTableLocator_FwKeyHobPei -- Locates the PEI Services Table pointer.
• FwKeyHobPeiEntry -- Main entry that enumerates key GUIDs, finds corresponding FFS files, extracts raw data, and builds HOBs.

Dependencies

• PEI Services (FFS file lookup, HOB creation)
• PEI Debug PPI
• Firmware Volume (FV) file system

Platform

• Architecture: IA32 (x86, PE32)
• Module GUID: 61C0F511-A691-4F54-974F-B9A42172CE53
• Source: Lenovo HR650X BIOS, Purley platform