The Linux Kernel
5.19.0
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      • 1. The Linux/x86 Boot Protocol
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      • 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
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The Linux Kernel
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  • 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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