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CONFIG_EFI_RUNTIME_MAP: Export efi runtime maps to sysfs

General informations

The Linux kernel 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-rc+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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