The Linux Kernel
6.3.0-rc3
  • A guide to the Kernel Development Process
  • Submitting patches: the essential guide to getting your code into the kernel
  • Code of conduct
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  • All development-process docs
  • Core API Documentation
  • Driver implementer’s API guide
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  • The Linux kernel user-space API guide
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  • CPU Architectures
    • ARC architecture
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    • x86-specific Documentation
      • 1. The Linux/x86 Boot Protocol
      • 2. DeviceTree Booting
      • 3. x86 Feature Flags
      • 4. x86 Topology
      • 5. Kernel level exception handling
      • 6. Kernel Stacks
      • 7. Kernel Entries
      • 8. Early Printk
      • 9. ORC unwinder
      • 10. Zero Page
      • 11. The TLB
      • 12. MTRR (Memory Type Range Register) control
      • 13. PAT (Page Attribute Table)
      • 14. Hardware-Feedback Interface for scheduling on Intel Hardware
      • 15. x86 IOMMU Support
      • 16. Intel(R) TXT Overview
      • 17. AMD Memory Encryption
      • 18. AMD HSMP interface
      • 19. Intel Trust Domain Extensions (TDX)
      • 20. Page Table Isolation (PTI)
      • 21. Microarchitectural Data Sampling (MDS) mitigation
      • 22. The Linux Microcode Loader
      • 23. User Interface for Resource Control feature
      • 24. TSX Async Abort (TAA) mitigation
      • 25. Bus lock detection and handling
      • 26. USB Legacy support
      • 27. i386 Support
      • 28. x86_64 Support
        • 28.1. AMD64 Specific Boot Options
        • 28.2. General note on [U]EFI x86_64 support
        • 28.3. Memory Management
        • 28.4. 5-level paging
        • 28.5. Fake NUMA For CPUSets
        • 28.6. Firmware support for CPU hotplug under Linux/x86-64
        • 28.7. Configurable sysfs parameters for the x86-64 machine check code
        • 28.8. Using FS and GS segments in user space applications
      • 29. In-Field Scan
      • 30. Shared Virtual Addressing (SVA) with ENQCMD
      • 31. Software Guard eXtensions (SGX)
      • 32. Feature status on x86 architecture
      • 33. x86-specific ELF Auxiliary Vectors
      • 34. Using XSTATE features in user space applications
    • Xtensa Architecture
  • Unsorted Documentation
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The Linux Kernel
  • CPU Architectures
  • x86-specific Documentation
  • 28. x86_64 Support
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28. x86_64 Support¶

  • 28.1. AMD64 Specific Boot Options
    • 28.1.1. Machine check
    • 28.1.2. APICs
    • 28.1.3. Timing
    • 28.1.4. Idle loop
    • 28.1.5. Rebooting
    • 28.1.6. NUMA
    • 28.1.7. ACPI
    • 28.1.8. PCI
    • 28.1.9. IOMMU (input/output memory management unit)
    • 28.1.10. Miscellaneous
    • 28.1.11. AMD SEV (Secure Encrypted Virtualization)
  • 28.2. General note on [U]EFI x86_64 support
    • 28.2.1. Mechanics
  • 28.3. Memory Management
    • 28.3.1. Complete virtual memory map with 4-level page tables
    • 28.3.2. Complete virtual memory map with 5-level page tables
  • 28.4. 5-level paging
    • 28.4.1. Overview
    • 28.4.2. Enabling 5-level paging
    • 28.4.3. User-space and large virtual address space
  • 28.5. Fake NUMA For CPUSets
  • 28.6. Firmware support for CPU hotplug under Linux/x86-64
  • 28.7. Configurable sysfs parameters for the x86-64 machine check code
  • 28.8. Using FS and GS segments in user space applications
    • 28.8.1. Common FS and GS usage
    • 28.8.2. Reading and writing the FS/GS base address
    • 28.8.3. Accessing FS/GS base with arch_prctl()
    • 28.8.4. Accessing FS/GS base with the FSGSBASE instructions
    • 28.8.5. Compiler support for FS/GS based addressing
    • 28.8.6. FS/GS based addressing with inline assembly
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