User Control
The REE patch (teecd and tzdriver.ko) in the TrustZone kit must be executed by the root user. The teecd user-mode daemon must be loaded from the absolute path /usr/bin/teecd.
The CA and TA must be run and loaded as the root user. Otherwise, they fail to be loaded or communicate with each other through the REE Patch.
Parent topic: Security Hardening