This RFC proposes an implementation of a remoteproc tee driver to communicate with a TEE trusted application in charge of authenticating and loading remoteproc firmware image in an Arm secure context.
The services implemented are the same as those offered by the Linux remoteproc framework: - load of a signed firmware - start/stop of a coprocessor - get the resource table
The OP-TEE code in charge of providing the service in a trusted application is proposed for upstream here: https://github.com/OP-TEE/optee_os/pull/6027
For more details on the implementation a presentation is available here: https://resources.linaro.org/en/resource/6c5bGvZwUAjX56fvxthxds
Arnaud Pouliquen (4): tee: Re-enable vmalloc page support for shared memory remoteproc: Add TEE support dt-bindings: remoteproc: add compatibility for TEE support remoteproc: stm32: Add support of an OP-TEE TA to load the firmware
.../bindings/remoteproc/st,stm32-rproc.yaml | 33 +- drivers/remoteproc/Kconfig | 9 + drivers/remoteproc/Makefile | 1 + drivers/remoteproc/stm32_rproc.c | 234 +++++++++-- drivers/remoteproc/tee_remoteproc.c | 397 ++++++++++++++++++ drivers/tee/tee_shm.c | 24 +- include/linux/tee_remoteproc.h | 101 +++++ 7 files changed, 753 insertions(+), 46 deletions(-) create mode 100644 drivers/remoteproc/tee_remoteproc.c create mode 100644 include/linux/tee_remoteproc.h