CONFIG_EFI_RUNTIME_MAP: Export EFI runtime maps to sysfs

General informations

The Linux kernel configuration item CONFIG_EFI_RUNTIME_MAP has multiple definitions:

Export EFI runtime maps to sysfs found in arch/x86/Kconfig

The configuration item CONFIG_EFI_RUNTIME_MAP:

• prompt: Export EFI runtime maps to sysfs
• type: bool
• depends on: ( CONFIG_EXPERT ) && ( CONFIG_EFI )
• defined in arch/x86/Kconfig
• found in Linux kernels: 6.2–6.17, 6.18-rc+HEAD

Help text

Export EFI runtime memory regions to /sys/firmware/efi/runtime-map. That memory map is required by the 2nd kernel to set up EFI virtual mappings after kexec, but can also be used for debugging purposes.

See also Documentation/ABI/testing/sysfs-firmware-efi-runtime-map.

Export efi runtime maps to sysfs found in drivers/firmware/efi/Kconfig

The configuration item CONFIG_EFI_RUNTIME_MAP:

• prompt: Export efi runtime maps to sysfs
• type: bool
• depends on: CONFIG_X86 && CONFIG_EFI && CONFIG_KEXEC_CORE
• defined in drivers/firmware/efi/Kconfig
• found in Linux kernels: 3.14–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.1, 6.1+HEAD

Help text

Export efi runtime memory maps to /sys/firmware/efi/runtime-map. That memory map is used for example by kexec to set up efi virtual mapping the 2nd kernel, but can also be used for debugging purposes.

See also Documentation/ABI/testing/sysfs-firmware-efi-runtime-map.

Hardware

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The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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