diff options
| author | Ard Biesheuvel <ardb@kernel.org> | 2022-11-07 09:17:16 +0100 |
|---|---|---|
| committer | Ard Biesheuvel <ardb@kernel.org> | 2022-11-18 09:14:09 +0100 |
| commit | 1fff234de2b6047ee311c6bf88f31ad5008f2889 (patch) | |
| tree | 730cbd65af945e6ef4ac46f8bda9e72e341ff4fe /arch/x86/Kconfig | |
| parent | efi: runtime-maps: Clarify purpose and enable by default for kexec (diff) | |
| download | linux-1fff234de2b6047ee311c6bf88f31ad5008f2889.tar.xz linux-1fff234de2b6047ee311c6bf88f31ad5008f2889.zip | |
efi: x86: Move EFI runtime map sysfs code to arch/x86
The EFI runtime map code is only wired up on x86, which is the only
architecture that has a need for it in its implementation of kexec.
So let's move this code under arch/x86 and drop all references to it
from generic code. To ensure that the efi_runtime_map_init() is invoked
at the appropriate time use a 'sync' subsys_initcall() that will be
called right after the EFI initcall made from generic code where the
original invocation of efi_runtime_map_init() resided.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Dave Young <dyoung@redhat.com>
Diffstat (limited to 'arch/x86/Kconfig')
| -rw-r--r-- | arch/x86/Kconfig | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index e2f89a7495d2..eaf84759482e 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -2014,6 +2014,17 @@ config EFI_MAX_FAKE_MEM Ranges can be set up to this value using comma-separated list. The default value is 8. +config EFI_RUNTIME_MAP + bool "Export EFI runtime maps to sysfs" if EXPERT + depends on EFI + default KEXEC_CORE + help + 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. + source "kernel/Kconfig.hz" config KEXEC |