@@ -27,13 +27,13 @@ config EFI_VARS_PSTORE_DEFAULT_DISABLE
using the efivars module's pstore_disable parameter.
config EFI_RUNTIME_MAP
- bool "Export efi runtime maps to sysfs"
- depends on X86 && EFI && KEXEC_CORE
- default y
+ bool "Export EFI runtime maps to sysfs" if EXPERT
+ depends on X86 && EFI
+ default KEXEC_CORE
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.
+ 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.
The current Kconfig logic for CONFIG_EFI_RUNTIME_MAPS does not convey that without it, a kexec kernel is not able to boot in EFI mode at all. So clarify this, and make the option only configurable via the menu system if CONFIG_EXPERT is set. Signed-off-by: Ard Biesheuvel <ardb@kernel.org> --- drivers/firmware/efi/Kconfig | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-)