The Linux Kernel
5.16.0-rc1
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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
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      • 11. The TLB
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      • 17. Page Table Isolation (PTI)
      • 18. Microarchitectural Data Sampling (MDS) mitigation
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      • 20. User Interface for Resource Control feature
      • 21. TSX Async Abort (TAA) mitigation
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      • 23. USB Legacy support
      • 24. i386 Support
      • 25. x86_64 Support
        • 25.1. AMD64 Specific Boot Options
        • 25.2. General note on [U]EFI x86_64 support
        • 25.3. Memory Management
        • 25.4. 5-level paging
        • 25.5. Fake NUMA For CPUSets
        • 25.6. Firmware support for CPU hotplug under Linux/x86-64
        • 25.7. Configurable sysfs parameters for the x86-64 machine check code
        • 25.8. Using FS and GS segments in user space applications
      • 26. Shared Virtual Addressing (SVA) with ENQCMD
      • 27. Software Guard eXtensions (SGX)
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The Linux Kernel
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  • x86-specific Documentation »
  • 25. x86_64 Support
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25. x86_64 Support¶

  • 25.1. AMD64 Specific Boot Options
    • 25.1.1. Machine check
    • 25.1.2. APICs
    • 25.1.3. Timing
    • 25.1.4. Idle loop
    • 25.1.5. Rebooting
    • 25.1.6. Non Executable Mappings
    • 25.1.7. NUMA
    • 25.1.8. ACPI
    • 25.1.9. PCI
    • 25.1.10. IOMMU (input/output memory management unit)
    • 25.1.11. Miscellaneous
  • 25.2. General note on [U]EFI x86_64 support
    • 25.2.1. Mechanics
  • 25.3. Memory Management
    • 25.3.1. Complete virtual memory map with 4-level page tables
    • 25.3.2. Complete virtual memory map with 5-level page tables
  • 25.4. 5-level paging
    • 25.4.1. Overview
    • 25.4.2. Enabling 5-level paging
    • 25.4.3. User-space and large virtual address space
  • 25.5. Fake NUMA For CPUSets
  • 25.6. Firmware support for CPU hotplug under Linux/x86-64
  • 25.7. Configurable sysfs parameters for the x86-64 machine check code
  • 25.8. Using FS and GS segments in user space applications
    • 25.8.1. Common FS and GS usage
    • 25.8.2. Reading and writing the FS/GS base address
    • 25.8.3. Accessing FS/GS base with arch_prctl()
    • 25.8.4. Accessing FS/GS base with the FSGSBASE instructions
    • 25.8.5. Compiler support for FS/GS based addressing
    • 25.8.6. FS/GS based addressing with inline assembly
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