30. x86_64 Support

• 30.1. General note on [U]EFI x86_64 support
  • 30.1.1. Mechanics
• 30.2. Memory Management
  • 30.2.1. Complete virtual memory map with 4-level page tables
  • 30.2.2. Complete virtual memory map with 5-level page tables
• 30.3. 5-level paging
  • 30.3.1. Overview
  • 30.3.2. User-space and large virtual address space
• 30.4. Fake NUMA For CPUSets
• 30.5. Firmware support for CPU hotplug under Linux/x86-64
• 30.6. Configurable sysfs parameters for the x86-64 machine check code
• 30.7. Using FS and GS segments in user space applications
  • 30.7.1. Common FS and GS usage
  • 30.7.2. Reading and writing the FS/GS base address
  • 30.7.3. Accessing FS/GS base with arch_prctl()
  • 30.7.4. Accessing FS/GS base with the FSGSBASE instructions
  • 30.7.5. Compiler support for FS/GS based addressing
  • 30.7.6. FS/GS based addressing with inline assembly
• 30.8. Flexible Return and Event Delivery (FRED)
  • 30.8.1. Overview
  • 30.8.2. Software based event dispatching
  • 30.8.3. Full supervisor/user context
  • 30.8.4. LKGS
  • 30.8.5. Stack levels