diff options
Diffstat (limited to 'zephyr/Kconfig')
| -rw-r--r-- | zephyr/Kconfig | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/zephyr/Kconfig b/zephyr/Kconfig index 97426970d6..6c16e7b3b1 100644 --- a/zephyr/Kconfig +++ b/zephyr/Kconfig @@ -352,4 +352,29 @@ config PLATFORM_EC_CONSOLE_CMD_WAITMS endif # PLATFORM_EC_TIMER +config PLATFORM_EC_VSTORE + bool "Secure temporary storage for verified boot" + default y + help + Enable support for storing a block of data received from the AP so it + can be read back later by the AP. This is helpful since the AP may + reboot or resume and want the data early in its start-up before it + has access to SDRAM. + + There are a fixed number of slots and each can hold a fixed amount of + data (EC_VSTORE_SLOT_SIZE bytes). Once a slot is written it is locked + and cannot be written again unless explicitly unlocked. + + Stored data is preserved when the EC moved from RO to RW. + +config PLATFORM_EC_VSTORE_SLOT_COUNT + int "Number of slots" + depends on PLATFORM_EC_VSTORE + default 1 + help + Set the number of slots available in the verified-boot store. The + number required depends on the AP firmware. Typically the vstore is + used only for recording a hash of the read-write AP firmware for + checking on resume. For this, one slot is enough. + endif # PLATFORM_EC |