In next TF-A version the stm32mp1 platform will support the Firmware Image Package (FIP) [1], a container filled with: - the U-Boot binary = u-boot-nodtb.bin - the U-Boot device tree = u-boot.dtb - the Secure OS (OP-TEE) or the secure monitor (SP_MIN)
Upstream is in progress on TF-A side ([3] but reviews don't yet start).
Each part of the FIP is loaded by TF-A BL2 and U-Boot is executed with its device tree address as parameter (nt_fw_dtb = r2 introduced by commit 4ac345220afa ("board: stm32mp1: use FDT address provided by TF-A at boot time")
This FIP container simplifies the OP-TEE management (same number of partition with or without OP-TEE, OP-TEE dynamically updates the U-Boot device tree to add the required OP-TEE nodes) and allow support of generic TF-A features as PKI [2].
This serie allows to generate U-Boot configured for the TF-A BL2 image types: - STM32IMAGE: stm32mp15_trusted_defconfig (current behavior) - FIP: stm32mp15_defconfig (NEW)
The FIP will be the STMicroelectronics recommended image type for STM32MP15x and the STM32IMAGE support should be marked deprecated in a future TF-A release.
To prepare this migration, the serie move all the specific code or device tree nodes for TF-A load of STM32IMAGE under compilation flag CONFIG_STM32MP15x_STM32IMAGE.
This V3 serie of [4] is rebased on top for u-boot-stm32/master.
I just update documentation after [5] message to clarify TF-A compilation step.
[1] 4.11. Firmware Image Package (FIP) fiphttps://trustedfirmware-a.readthedocs.io/en/latest/design/firmware-design.ht... stm32mp1: handle TF-A boot with FIP [2] Authentication Framework & Chain of Trust https://trustedfirmware-a.readthedocs.io/en/latest/design/auth-framework.htm...
[3] TF-A Serie proposal : FIP and FCONF for STM32MP1 https://github.com/Yann-lms/arm-trusted-firmware/commits/fip_fconf
[4] stm32mp1: handle TF-A boot with FIP http://patchwork.ozlabs.org/project/uboot/list/?series=253677&state=*
[5] U-BOOT 2021.07 and STM32MP15x issues for Trusted Boot Chain https://lists.denx.de/pipermail/u-boot/2021-July/455750.html
Changes in v3: - add reference for STM32 WIKI, TF-A and OP-TEE - add information about TF-A compilation and clarify the output files
Changes in v2: - synchronize defconfig with latest change - fix one typo: s/ enought / enough
Patrick Delaunay (5): arm: stm32mp: add config for STM32IMAGE support arm: stm32mp: handle the OP-TEE nodes in DT with FIP support arm: stm32mp: add defconfig for trusted boot with FIP doc: st: stm32mp1: Add FIP support for trusted boot stm32mp1: stm32prog: remove stm32prog_get_tee_partitions with FIP
arch/arm/dts/stm32mp157a-dk1-u-boot.dtsi | 9 +- arch/arm/dts/stm32mp157c-ed1-u-boot.dtsi | 9 +- arch/arm/mach-stm32mp/Kconfig | 7 + .../cmd_stm32prog/cmd_stm32prog.c | 2 + .../mach-stm32mp/cmd_stm32prog/stm32prog.c | 4 + .../mach-stm32mp/cmd_stm32prog/stm32prog.h | 2 + arch/arm/mach-stm32mp/config.mk | 2 +- arch/arm/mach-stm32mp/fdt.c | 11 +- .../arm/mach-stm32mp/include/mach/stm32prog.h | 2 + board/st/common/Kconfig | 21 +- board/st/common/stm32mp_mtdparts.c | 31 +- board/st/stm32mp1/MAINTAINERS | 1 + board/st/stm32mp1/stm32mp1.c | 10 +- configs/stm32mp15_defconfig | 158 +++++++++ configs/stm32mp15_trusted_defconfig | 1 + doc/board/st/stm32mp1.rst | 328 +++++++++++++----- 16 files changed, 481 insertions(+), 117 deletions(-) create mode 100644 configs/stm32mp15_defconfig