Hi, In UefiSpec.h, we define the UEFI version 2.7 in system table. #define EFI_2_70_SYSTEM_TABLE_REVISION (( 2 << 16 ) | ( 70 )) #define EFI_SYSTEM_TABLE_REVISION EFI_2_70_SYSTEM_TABLE_REVISION #define EFI_SPECIFICATION_VERSION EFI_SYSTEM_TABLE_REVISION #define EFI_RUNTIME_SERVICES_REVISION EFI_SPECIFICATION_VERSION In Linux dmesg [    0.000000] efi: EFI v2.70 by EDK II Shall it be updated to v2.8 to align with UEFI spec? Thanks, Derek