diff options
| author | Ard Biesheuvel <ardb@kernel.org> | 2022-11-07 08:42:08 +0100 |
|---|---|---|
| committer | Ard Biesheuvel <ardb@kernel.org> | 2022-11-18 09:14:09 +0100 |
| commit | 8dfac4d8ad27c168c6e778adbebaac85b92606d8 (patch) | |
| tree | b32a40df3056218308eef0561f8e8d91bd9196d4 /drivers/firmware | |
| parent | efi: pstore: Add module parameter for setting the record size (diff) | |
| download | linux-8dfac4d8ad27c168c6e778adbebaac85b92606d8.tar.xz linux-8dfac4d8ad27c168c6e778adbebaac85b92606d8.zip | |
efi: runtime-maps: Clarify purpose and enable by default for kexec
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>
Reviewed-by: Dave Young <dyoung@redhat.com>
Diffstat (limited to 'drivers/firmware')
| -rw-r--r-- | drivers/firmware/efi/Kconfig | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/firmware/efi/Kconfig b/drivers/firmware/efi/Kconfig index 0d5201e49841..552512f211a1 100644 --- a/drivers/firmware/efi/Kconfig +++ b/drivers/firmware/efi/Kconfig @@ -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. |