There is no storage controller driver in OP-TEE, as pointed out in the RPMB doc:
There is no eMMC controller driver in OP-TEE. The device operations all have to go through the normal world. They are handled by the tee-supplicant process which further relies on the kernel's ioctl() interface to access the device.
Is doing this a roadmap (or potential roadmap) item for OP-TEE? I'm wondering what discussions might have happened in the past, and if the idea has been rejected for some reason. Or, is it a potential future to do item?
The use case would be if OP-TEE provided a secure key store, and access was need to that key store prior to normal world being available...for example, to store keys that encrypted the disk to be used by Linux.
Thanks, Stuart