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# TF-M/PSA Related
# Copyright (c) 2019, 2020 Linaro Limited
# SPDX-License-Identifier: Apache-2.0
menuconfig BUILD_WITH_TFM
bool "Build with TF-M as the Secure Execution Environment"
depends on TRUSTED_EXECUTION_NONSECURE
help
When enabled, this option instructs the Zephyr build process to
additionaly generate a TF-M image for the Secure Execution
environment, along with the Zephyr image. The Zephyr image
itself is to be executed in the Non-Secure Processing Environment.
The required dependency on TRUSTED_EXECUTION_NONSECURE
ensures that the Zephyr image is built as a Non-Secure image. Both
TF-M and Zephyr images, as well as the veneer object file that links
them, are generated during the normal Zephyr build process.
Note:
Building with the "_nonsecure" BOARD variant (e.g.
"mps2_an521_nonsecure") ensures that
CONFIG_TRUSTED_EXECUTION_NONSECURE ie enabled.
if BUILD_WITH_TFM
config TFM_KEY_FILE_S
string "Path to private key used to sign secure firmware images."
depends on BUILD_WITH_TFM
default "${ZEPHYR_BASE}/../modules/tee/tfm/trusted-firmware-m/bl2/ext/mcuboot/root-rsa-3072.pem"
help
The path and filename for the .pem file containing the private key
that should be used by the BL2 bootloader when signing secure
firmware images.
config TFM_KEY_FILE_NS
string "Path to private key used to sign non-secure firmware images."
depends on BUILD_WITH_TFM
default "${ZEPHYR_BASE}/../modules/tee/tfm/trusted-firmware-m/bl2/ext/mcuboot/root-rsa-3072_1.pem"
help
The path and filename for the .pem file containing the private key
that should be used by the BL2 bootloader when signing non-secure
firmware images.
choice TFM_BL2
prompt "BL2 configuration, should TFM build with MCUboot support"
default TFM_BL2_CONFIG_FILE_DEFAULT
config TFM_BL2_CONFIG_FILE_DEFAULT
bool "Use TFM BL2 setting from TFM configuration file"
config TFM_BL2_TRUE
bool "TFM BL2 enabled"
config TFM_BL2_FALSE
bool "TFM BL2 disabled"
endchoice
if !TFM_BL2_FALSE
config ROM_START_OFFSET
hex "ROM Start Offset accounting for BL2 Header in the NS image"
default 0x400
help
By default BL2 header size in TF-M is 0x400. ROM_START_OFFSET
needs to be updated if TF-M switches to use a different header
size for BL2.
endif # !TFM_BL2_FALSE
endif # BUILD_WITH_TFM