mirror of
https://github.com/ARM-software/arm-trusted-firmware.git
synced 2025-04-16 09:34:18 +00:00
47bf3ac31e
Right now, the measured boot driver is strongly coupled with the TCG event log driver. It would not be possible to push the measurements somewhere else, for instance to a physical TPM. To enable this latter use case, turn the driver's init and teardown functions into platform hooks. Call them bl2_plat_mboot_init()/finish(). This allows each platform to implement them appropriately, depending on the type of measured boot backend they use. For example, on a platform with a physical TPM, the plat_mboot_init() hook would startup the TPM and setup it underlying bus (e.g. SPI). Move the current implementation of the init and teardown function to the FVP platform layer. Finally move the conditional compilation logic (#if MEASURED_BOOT) out of bl2_main() to improve its readability. Provide a dummy implementation in the case measured boot is not included in the build. Change-Id: Ib6474cb5a9c1e3d4a30c7f228431b22d1a6e85e3 Signed-off-by: Sandrine Bailleux <sandrine.bailleux@arm.com> Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
51 lines
1.2 KiB
Makefile
51 lines
1.2 KiB
Makefile
#
|
|
# Copyright (c) 2020-2021, Arm Limited. All rights reserved.
|
|
#
|
|
# SPDX-License-Identifier: BSD-3-Clause
|
|
#
|
|
|
|
# Default log level to dump the event log (LOG_LEVEL_INFO)
|
|
EVENT_LOG_LEVEL ?= 40
|
|
|
|
# TPM hash algorithm
|
|
TPM_HASH_ALG := sha256
|
|
|
|
ifeq (${TPM_HASH_ALG}, sha512)
|
|
MBEDTLS_MD_ID := MBEDTLS_MD_SHA512
|
|
TPM_ALG_ID := TPM_ALG_SHA512
|
|
TCG_DIGEST_SIZE := 64U
|
|
else ifeq (${TPM_HASH_ALG}, sha384)
|
|
MBEDTLS_MD_ID := MBEDTLS_MD_SHA384
|
|
TPM_ALG_ID := TPM_ALG_SHA384
|
|
TCG_DIGEST_SIZE := 48U
|
|
else
|
|
MBEDTLS_MD_ID := MBEDTLS_MD_SHA256
|
|
TPM_ALG_ID := TPM_ALG_SHA256
|
|
TCG_DIGEST_SIZE := 32U
|
|
endif
|
|
|
|
# Event Log length in bytes
|
|
EVENT_LOG_SIZE := 1024
|
|
|
|
# Set definitions for mbed TLS library and Measured Boot driver
|
|
$(eval $(call add_defines,\
|
|
$(sort \
|
|
MBEDTLS_MD_ID \
|
|
TPM_ALG_ID \
|
|
TCG_DIGEST_SIZE \
|
|
EVENT_LOG_SIZE \
|
|
EVENT_LOG_LEVEL \
|
|
)))
|
|
|
|
ifeq (${HASH_ALG}, sha256)
|
|
ifneq (${TPM_HASH_ALG}, sha256)
|
|
$(eval $(call add_define,MBEDTLS_SHA512_C))
|
|
endif
|
|
endif
|
|
|
|
MEASURED_BOOT_SRC_DIR := drivers/measured_boot/
|
|
|
|
MEASURED_BOOT_SOURCES := ${MEASURED_BOOT_SRC_DIR}event_log.c \
|
|
${MEASURED_BOOT_SRC_DIR}event_print.c
|
|
|
|
BL2_SOURCES += ${MEASURED_BOOT_SOURCES}
|