Main updates from the previous version [1][2]: ------------------------------------------
1) Rework resource table management - Rework tee_rproc_parse_fw to temporary map the resource table address to create a cached_table (similar to what is done in rproc_elf_load_rsc_table()). - Rename tee_rproc_get_loaded_rsc_table to tee_rproc_find_loaded_rsc_table - Introduce rproc_pa_to_va() allowing to translate the resource table physical address to virtual address based on remoteproc carveouts.
2) Merge the 2 "st,stm32-rproc.yaml" bindings patch in one As the st,rproc-id" is linked to the introduction of the "st,stm32mp1-m4-tee" compatible, merge following patches to address Krzysztof concern. - [PATCH v5 2/7] dt-bindings: remoteproc: Add compatibility for TEE support - [PATCH v5 3/7] dt-bindings: remoteproc: Add processor identifier property
More details on updates are listed in commits messages.
[1] https://lore.kernel.org/lkml/Zlil4YSjHxb0FRgf@p14s/T/ [2] https://lore.kernel.org/lkml/20240521122458.3517054-1-arnaud.pouliquen@foss....
base-commit: 1613e604df0cd359cf2a7fbd9be7a0bcfacfabd0
Description of the feature: -------------------------- This series proposes the implementation of a remoteproc tee driver to communicate with a TEE trusted application responsible for authenticating and loading the remoteproc firmware image in an Arm secure context.
1) Principle:
The remoteproc tee driver provides services to communicate with the OP-TEE trusted application running on the Trusted Execution Context (TEE). The trusted application in TEE manages the remote processor lifecycle:
- authenticating and loading firmware images, - isolating and securing the remote processor memories, - supporting multi-firmware (e.g., TF-M + Zephyr on a Cortex-M33), - managing the start and stop of the firmware by the TEE.
2) Format of the signed image:
Refer to: https://github.com/OP-TEE/optee_os/blob/master/ta/remoteproc/src/remoteproc_...
3) OP-TEE trusted application API:
Refer to: https://github.com/OP-TEE/optee_os/blob/master/ta/remoteproc/include/ta_remo...
4) OP-TEE signature script
Refer to: https://github.com/OP-TEE/optee_os/blob/master/scripts/sign_rproc_fw.py
Example of usage: sign_rproc_fw.py --in <fw1.elf> --in <fw2.elf> --out <signed_fw.sign> --key ${OP-TEE_PATH}/keys/default.pem
5) Impact on User space Application
No sysfs impact.the user only needs to provide the signed firmware image instead of the ELF image.
For more information about the implementation, a presentation is available here (note that the format of the signed image has evolved between the presentation and the integration in OP-TEE).
https://resources.linaro.org/en/resource/6c5bGvZwUAjX56fvxthxds
Arnaud Pouliquen (5): remoteproc: core: Introduce rproc_pa_to_va helper remoteproc: Add TEE support dt-bindings: remoteproc: Add compatibility for TEE support remoteproc: stm32: Create sub-functions to request shutdown and release remoteproc: stm32: Add support of an OP-TEE TA to load the firmware
.../bindings/remoteproc/st,stm32-rproc.yaml | 58 ++- drivers/remoteproc/Kconfig | 10 + drivers/remoteproc/Makefile | 1 + drivers/remoteproc/remoteproc_core.c | 74 ++- drivers/remoteproc/stm32_rproc.c | 147 ++++-- drivers/remoteproc/tee_remoteproc.c | 451 ++++++++++++++++++ include/linux/remoteproc.h | 7 + include/linux/tee_remoteproc.h | 99 ++++ 8 files changed, 801 insertions(+), 46 deletions(-) create mode 100644 drivers/remoteproc/tee_remoteproc.c create mode 100644 include/linux/tee_remoteproc.h
base-commit: 1613e604df0cd359cf2a7fbd9be7a0bcfacfabd0