Trusted Firmware-M (TF-M) is an implementation of Platform Security Architecture (PSA) for M class processors. TF-M includes a couple of secure services. Many partners want to take advantage of that to extend their PSA features.
Our design is to extend TF-M’s services to Zephyr based dual-core SoC. A Zephyr instance runs in secure core with secure services, another Zephyr instance runs in non-secure core which can call secure services. For this solution, the first step is to modularize secure services in TF-M and remove service platform dependencies. Then start them as Zephyr threads in secure core. And at last, implement IPC interface for the service requests from non-secure core to secure core by leveraging openAMP which is supported in Zephyr. This session will discuss the TF-M secure services modularization, running secure services in Zephyr and the IPC implementation.
Sr. Software Engineer (arm)
Senior Software Engineer of arm, working as Linaro assignee for LITE. Mainly focus on embedded and IoT, v8-m of TF-M.