efi: Export EFI runtime memory mapping to sysfs

[deliverable/linux.git] / drivers / firmware / efi / Kconfig

diff --git a/drivers/firmware/efi/Kconfig b/drivers/firmware/efi/Kconfig
index 3150aa4874e8f67e4360635934acdcb11bac6fef..730f5f2e8b7f7734bddccf286ab300d8c3478a49 100644 (file)
--- a/drivers/firmware/efi/Kconfig
+++ b/drivers/firmware/efi/Kconfig
@@ -39,4 +39,15 @@ config EFI_VARS_PSTORE_DEFAULT_DISABLE
 config UEFI_CPER
        def_bool n
 
+config EFI_RUNTIME_MAP
+       bool "Export efi runtime maps to sysfs"
+       depends on X86 && EFI && KEXEC
+       default y
+       help
+         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.
+
 endmenu