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Introduce COT build option

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Allows to select the chain of trust to use when the Trusted Boot feature
is enabled. This affects both the cert_create tool and the firmware
itself.

Right now, the only available CoT is TBBR.

Change-Id: I7ab54e66508a1416cb3fcd3dfb0f055696763b3d
Signed-off-by: Sandrine Bailleux <sandrine.bailleux@arm.com>
This commit is contained in:
Sandrine Bailleux 2020-01-15 10:23:25 +01:00
parent 067f7e9c52
commit 3bff910dc1
4 changed files with 16 additions and 4 deletions
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2
Makefile
View File

@ -1009,7 +1009,7 @@ certtool: ${CRTTOOL}
.PHONY: ${CRTTOOL}
${CRTTOOL}:
${Q}${MAKE} PLAT=${PLAT} USE_TBBR_DEFS=${USE_TBBR_DEFS} --no-print-directory -C ${CRTTOOLPATH}
${Q}${MAKE} PLAT=${PLAT} USE_TBBR_DEFS=${USE_TBBR_DEFS} COT=${COT} --no-print-directory -C ${CRTTOOLPATH}
@${ECHO_BLANK_LINE}
@echo "Built $@ successfully"
@${ECHO_BLANK_LINE}

3
docs/getting_started/build-options.rst
View File

@ -128,6 +128,9 @@ Common build options
``plat_secondary_cold_boot_setup()`` platform porting interfaces do not need
to be implemented in this case.
- ``COT``: When Trusted Boot is enabled, selects the desired chain of trust.
Defaults to ``tbbr``.
- ``CRASH_REPORTING``: A non-zero value enables a console dump of processor
register state when an unexpected exception occurs during execution of
BL31. This option defaults to the value of ``DEBUG`` - i.e. by default

5
make_helpers/defaults.mk
View File

@ -1,5 +1,5 @@
#
# Copyright (c) 2016-2019, ARM Limited and Contributors. All rights reserved.
# Copyright (c) 2016-2020, ARM Limited and Contributors. All rights reserved.
#
# SPDX-License-Identifier: BSD-3-Clause
#
@ -201,6 +201,9 @@ USE_DEBUGFS := 0
# Build option to choose whether Trusted Firmware uses library at ROM
USE_ROMLIB := 0
# Chain of trust.
COT := tbbr
# Use tbbr_oid.h instead of platform_oid.h
USE_TBBR_DEFS := 1

10
plat/arm/common/arm_common.mk
View File

@ -1,5 +1,5 @@
#
# Copyright (c) 2015-2019, ARM Limited and Contributors. All rights reserved.
# Copyright (c) 2015-2020, ARM Limited and Contributors. All rights reserved.
#
# SPDX-License-Identifier: BSD-3-Clause
#
@ -254,7 +254,13 @@ ifneq (${TRUSTED_BOARD_BOOT},0)
AUTH_SOURCES := drivers/auth/auth_mod.c \
drivers/auth/crypto_mod.c \
drivers/auth/img_parser_mod.c \
drivers/auth/tbbr/tbbr_cot.c \
# Include the selected chain of trust sources.
ifeq (${COT},tbbr)
AUTH_SOURCES += drivers/auth/tbbr/tbbr_cot.c
else
$(error Unknown chain of trust ${COT})
endif
BL1_SOURCES += ${AUTH_SOURCES} \
bl1/tbbr/tbbr_img_desc.c \