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Kconfig: Introduce HAVE_CBFS_FILE_OPTION_BACKEND

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Introduce a new Kconfig option, `HAVE_CBFS_FILE_OPTION_BACKEND`, to
explicitly select the capability of using a CBFS file for option
storage.

This capability is currently only used by ChromeOS boards leveraging
FSP 2.0. By decoupling the capability check from the choice default
selection logic, we can simplify the configuration of the option
backend choice:

- The new capability config is set to 'y' only if `CHROMEOS &&
  PLATFORM_USES_FSP2_0`.
- The 'Option backend to use' choice now depends on this new capability
  config.

This change allows other SoC platforms beyond Intel to leverage this
feature.

TEST=Build all ChromeOS FSP 2.0 boards and confirm the default option
backend is still USE_CBFS_FILE_OPTION_BACKEND.

Change-Id: Ia55e0feae8fd462411ed3e9306d19ed6d1cfcaf1
Signed-off-by: Subrata Banik <subratabanik@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/89184
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kapil Porwal <kapilporwal@google.com>
This commit is contained in:
Subrata Banik 2025-09-15 20:45:04 +00:00
commit bb760bc9f3
1 changed files with 15 additions and 1 deletions
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16
src/Kconfig
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@ -149,7 +149,7 @@ config UTIL_GENPARSER
choice
prompt "Option backend to use"
default USE_CBFS_FILE_OPTION_BACKEND if CHROMEOS && PLATFORM_USES_FSP2_0
default USE_CBFS_FILE_OPTION_BACKEND if HAVE_CBFS_FILE_OPTION_BACKEND
default USE_MAINBOARD_SPECIFIC_OPTION_BACKEND if HAVE_MAINBOARD_SPECIFIC_OPTION_BACKEND
default USE_OPTION_TABLE if NVRAMCUI_SECONDARY_PAYLOAD
default USE_UEFI_VARIABLE_STORE if DRIVERS_EFI_VARIABLE_STORE && \
@ -864,6 +864,20 @@ config HAVE_MAINBOARD_SPECIFIC_OPTION_BACKEND
to access the values for runtime-configurable options. For example, a
custom BMC interface or an EEPROM with an externally-imposed layout.
config HAVE_CBFS_FILE_OPTION_BACKEND
bool
default y if CHROMEOS && PLATFORM_USES_FSP2_0
default n
help
Select this option if the platform uses CBFS file-based option backend
for storing configuration values at run time.
This feature allows for storing and retrieving configuration data
within a dedicated file inside the CBFS.
At present this feature is typically used by ChromeOS devices that
use Intel's Firmware Support Package (FSP).
config HAVE_OPTION_TABLE
bool
default n