Universal Scalable Firmware Specification

• Revision History
• Notices and Disclaimers

• 1. Universal Scalable Firmware (USF) Specification
  • 1.1. Terminology
  • 1.2. Motivation for Universal Scalable Firmware
  • 1.3. Simplicity, Determinisim and Debuggability
  • 1.4. USF Layers
    • 1.4.1. OS Interfaces
    • 1.4.2. Universal Payload
    • 1.4.3. Platform Orchestration Layer (POL)
    • 1.4.4. Scalable Firmware Support Package (sFSP)
• 2. Universal Payload
  • 2.1. Purpose
  • 2.2. Intended Audience
  • 2.3. Related Documents
  • 2.4. Universal Payload Overview
  • 2.5. Bootloaders
  • 2.6. Payload Modules
  • 2.7. Bootloader Interfaces
    • 2.7.1. Coreboot Payload Interface
    • 2.7.2. Slim Bootloader (SBL) Payload Interface
    • 2.7.3. PEI to DXE Interface
  • 2.8. OS interfaces
    • 2.8.1. OS Boot protocols
    • 2.8.2. Data interface
  • 2.9. Payload principle
  • 2.10. Payload Security
  • 2.11. Payload Image Format
    • 2.11.1. Payload Image Sections
    • 2.11.2. Universal Payload Information Section
    • 2.11.3. Universal Payload Loaded Image Section
  • 2.12. Hand-off state
    • 2.12.1. IA-32 and x64 Platforms
    • 2.12.2. ARM Platforms
    • 2.12.3. RISC-V Platforms
  • 2.13. Payload Interfaces
    • 2.13.1. ACPI tables
    • 2.13.2. HOB List
  • 2.14. HOB Data Structures
    • 2.14.1. Base Data Type
    • 2.14.2. EFI HOB TYPE
    • 2.14.3. EFI_HOB_GENERIC_HEADER
    • 2.14.4. HOB List Header
    • 2.14.5. EFI_HOB_GUID_TYPE
    • 2.14.6. EFI_PEI_GRAPHICS_INFO_HOB
    • 2.14.7. EFI_PEI_GRAPHICS_DEVICE_INFO_HOB
    • 2.14.8. EFI_HOB_RESOURCE_DESCRIPTOR
    • 2.14.9. EFI_HOB_MEMORY_ALLOCATION
  • 2.15. Future Interface
    • 2.15.1. CBOR encoded data
    • 2.15.2. FDT data structure
    • 2.15.3. Hand-off state
  • 2.16. References and Links
• 3. Platform Orchestration Layer (POL)
  • 3.1. Introduction
    • 3.1.1. Motivation for POL
    • 3.1.2. POL Design Principles
    • 3.1.3. Audience / Document scope
    • 3.1.4. Terminology
    • 3.1.5. Reference documents
  • 3.2. Architecture
    • 3.2.1. POL Overview
  • 3.3. Configuration Introduction
    • 3.3.1. Platform configuration
    • 3.3.2. 1.1.1 Example implementation
    • 3.3.3. Shareable platform code
    • 3.3.4. Advanced feature details
    • 3.3.5. Interface definitions
  • 3.4. XPU considerations
    • 3.4.1. Configuration
    • 3.4.2. Initialization
    • 3.4.3. Update
    • 3.4.4. Monitoring
  • 3.5. POL examples
    • 3.5.1. Slim bootloader
    • 3.5.2. u-boot
    • 3.5.3. Oreboot
    • 3.5.4. coreboot
    • 3.5.5. EDKII
• 4. Runtime
  • 4.1. Introduction
    • 4.1.1. ACPI
    • 4.1.2. UEFI Runtime
    • 4.1.3. SMM
• 5. Security
  • 5.1. Security Overview
    • 5.1.1. Firmware Resiliency - Protection
    • 5.1.2. Firmware Resiliency - Detection
    • 5.1.3. Firmware Resiliency - Recovery
    • 5.1.4. Measurment and Attestation
    • 5.1.5. DMA Protection
    • 5.1.6. Cryptography Agility
  • 5.2. Vulnerability Mitigation Strategy
    • 5.2.1. Eliminate Vulnerability
    • 5.2.2. Break Exploitation
    • 5.2.3. Contain Damage
    • 5.2.4. Limit Attack Window
• 6. Debug
  • 6.1. Debug Overview
    • 6.1.1. Requirements
    • 6.1.2. Design
    • 6.1.3. Source level debugging
• 7. YAML Format Boot Configuration
  • 7.1. Introduction
  • 7.2. Target Audience
  • 7.3. Configuration Description (YAML) Explained
  • 7.4. File Layout
    • 7.4.1. Meta-Data Markers
    • 7.4.2. YAML Tags
  • 7.5. Variable
  • 7.6. Template
  • 7.7. Configs
    • 7.7.1. Configuration Option Nodes
  • 7.8. Delta (DLT) File Explained
  • 7.9. DLT file rules
  • 7.10. Configuration Process
• 8. Scalable FSP
  • 8.1. Interfaces
  • 8.2. sFSP interactions
    • 8.2.1. FSP 2.2
    • 8.2.2. FSP 2.3
    • 8.2.3. FSP 2.next.next
    • 8.2.4. FSP 3.0 or FSP2.next.next
• 9. Bootloader Payloads
  • 9.1. References
    • 9.1.1. Bootloader Payloads –
    • 9.1.2. OS/Hv interfaces
    • 9.1.3. Platform implementations
    • 9.1.4. Security