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## SPDX-License-Identifier: GPL-2.0-only
config SMMSTORE
bool "Support for flash based, SMM mediated data store"
depends on BOOT_DEVICE_SUPPORTS_WRITES && HAVE_SMI_HANDLER
default y if PAYLOAD_TIANOCORE
select SPI_FLASH_SMM if BOOT_DEVICE_SPI_FLASH_RW_NOMMAP
config SMMSTORE_V2
bool "Use version 2 of SMMSTORE API"
depends on SMMSTORE
default y if PAYLOAD_TIANOCORE
default n
help
Version 2 of SMMSTORE allows secure communication with SMM and
makes no assumptions on the structure of the data stored within.
It splits the store into chunks to allows fault tolerant writes.
By using version 2 you cannot make use of software that expects
a version 1 SMMSTORE.
if SMMSTORE
config SMMSTORE_SIZE
hex "size of the SMMSTORE FMAP region"
default 0x40000
help
Sets the size of the default SMMSTORE FMAP region.
If using an UEFI payload, note that UEFI specifies at least 64K.
The current implementation of SMMSTORE is append only, so until
garbage collection is implemented it is better to set this to
a rather large value.
endif
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