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boot/uboot: add support for embedded TEE in binary format

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We can embed a TEE in ELF format into U-Boot, but versions of OP-TEE since
3.8.0 must be embedded in binary format, as the tee.bin contains important
meta-data. [1]

Update the configuration menu and the Makefile to allow selecting to
embed either tee.elf or tee.bin.

By default, embed the TEE in ELF format to stay compatible with existing
configurations.

[1] https://github.com/OP-TEE/optee_os/issues/4542

Signed-off-by: Vincent Stehlé <vincent.stehle@arm.com>
Cc: Christoph Muellner <christoph.muellner@theobroma-systems.com>
Signed-off-by: Julien Olivain <ju.o@free.fr>
This commit is contained in:
Vincent Stehlé
2025-01-07 15:21:09 +01:00
committed by Julien Olivain
parent 7b4b7a46fb
commit 1220b505bc
2 changed files with 29 additions and 1 deletions
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26
boot/uboot/Config.in
View File

@@ -274,7 +274,31 @@ config BR2_TARGET_UBOOT_NEEDS_OPTEE_TEE
Some platforms (such as Rockchip) encapsulate the TEE inside
U-Boot. This option makes sure optee-os gets built prior to
U-Boot, and that the TEE variable pointing to OPTEE's
tee.elf, is passed during the Buildroot build.
core file, is passed during the Buildroot build.
choice
prompt "U-Boot OPTEE TEE format"
default BR2_TARGET_UBOOT_NEEDS_OPTEE_TEE_ELF
depends on BR2_TARGET_UBOOT_NEEDS_OPTEE_TEE
help
Select the TEE format.
You may select the TEE in ELF format only for OP-TEE
versions before 3.8.0.
Since this version, the TEE in binary format must be used as
it contains important meta-data.
config BR2_TARGET_UBOOT_NEEDS_OPTEE_TEE_ELF
bool "tee.elf"
help
ELF format may be used only for OP-TEE versions before
3.8.0.
config BR2_TARGET_UBOOT_NEEDS_OPTEE_TEE_BIN
bool "tee.bin"
help
Binary format must be used for OP-TEE versions since 3.8.0.
endchoice
config BR2_TARGET_UBOOT_NEEDS_OPENSBI
bool "U-Boot needs OpenSBI"

4
boot/uboot/uboot.mk
View File

@@ -196,7 +196,11 @@ endif
ifeq ($(BR2_TARGET_UBOOT_NEEDS_OPTEE_TEE),y)
UBOOT_DEPENDENCIES += optee-os
ifeq ($(BR2_TARGET_UBOOT_NEEDS_OPTEE_TEE_ELF),y)
UBOOT_MAKE_OPTS += TEE=$(BINARIES_DIR)/tee.elf
else ifeq ($(BR2_TARGET_UBOOT_NEEDS_OPTEE_TEE_BIN),y)
UBOOT_MAKE_OPTS += TEE=$(BINARIES_DIR)/tee.bin
endif
endif
# TI K3 devices needs at least ti-sysfw (System Firmware) provided