diff options
| author |   Peter Jones <pjones@redhat.com> | 2020-06-15 16:24:08 -0400 |
|---|---|---|
| committer |   Ard Biesheuvel <ardb@kernel.org> | 2020-06-16 11:01:07 +0200 |
| commit | 435d1a471598752446a72ad1201b3c980526d869 (patch) | |
| tree | 5ac4ab29974a49acf3b768f4fc83121626511084 /drivers/firmware/efi/Kconfig | |
| parent | efi/libstub: Descriptions for stub helper functions (diff) | |
| download | linux-dev-435d1a471598752446a72ad1201b3c980526d869.tar.xz linux-dev-435d1a471598752446a72ad1201b3c980526d869.zip | |
efi: Make it possible to disable efivar_ssdt entirely
In most cases, such as CONFIG_ACPI_CUSTOM_DSDT and
CONFIG_ACPI_TABLE_UPGRADE, boot-time modifications to firmware tables
are tied to specific Kconfig options. Currently this is not the case
for modifying the ACPI SSDT via the efivar_ssdt kernel command line
option and associated EFI variable.
This patch adds CONFIG_EFI_CUSTOM_SSDT_OVERLAYS, which defaults
disabled, in order to allow enabling or disabling that feature during
the build.
Cc: <stable@vger.kernel.org>
Signed-off-by: Peter Jones <pjones@redhat.com>
Link: https://lore.kernel.org/r/20200615202408.2242614-1-pjones@redhat.com
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Diffstat (limited to 'drivers/firmware/efi/Kconfig')
| -rw-r--r-- | drivers/firmware/efi/Kconfig | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/firmware/efi/Kconfig b/drivers/firmware/efi/Kconfig index e6fc022bc87e..3939699e62fe 100644 --- a/drivers/firmware/efi/Kconfig +++ b/drivers/firmware/efi/Kconfig @@ -278,3 +278,14 @@ config EFI_EARLYCON depends on SERIAL_EARLYCON && !ARM && !IA64 select FONT_SUPPORT select ARCH_USE_MEMREMAP_PROT + +config EFI_CUSTOM_SSDT_OVERLAYS + bool "Load custom ACPI SSDT overlay from an EFI variable" + depends on EFI_VARS && ACPI + default ACPI_TABLE_UPGRADE + help + Allow loading of an ACPI SSDT overlay from an EFI variable specified + by a kernel command line option. + + See Documentation/admin-guide/acpi/ssdt-overlays.rst for more + information. |