Arm TrustZone explained -

focuses primarily on the Cortex-A TrustZone implementation, which is widely used on mobile devices. TrustZone is centered around the concept of protection domains named secure world (SW) and normal world (NW). Each physical processor core provides two virtual cores, one considered ‘secure’ (SW) and the other ‘non-secure’ (NW), as ARM TrustZone for dummies - YouTube Sep 01, 2019 SSL/TLS Certificates – TRUSTZONE

TrustZone for Armv8-M is designed to be very flexible, but such flexibility can also lead to some confusion. For example, in the case of RTOS design, should the RTOS be running in the Secure world or Non-secure world?

Dec 28, 2017 Interrupts from the secure world to the non-secure world TrustZone for Armv8-M forum Interrupts from the secure world to the non-secure world. Investigating ARM Cortex® M33 core with TrustZone

Trusted Execution Environments and Arm TrustZone | Azeria Labs

TrustZone – Arm Developer The Armv8-M architecture extends TrustZone to Cortex-M, enabling robust levels of protection. TrustZone for Armv8-M has the same high-level features as TrustZone on application processors, with the key benefit that switching between Secure and Non-secure worlds is done in hardware for faster transitions and improved power efficiency. Learn more Trusted Execution Environments and Arm TrustZone | Azeria Labs In TrustZone terminology, this entire environment is referred to as the Rich Execution Environment (REE). By contrast, the TrustZone virtual core hosts and runs a Trusted Execution Environment (TEE) in the “Secure World” (SWd). In practice, TrustZone virtual cores are implemented by fast context switching performed inside the Secure Monitor. linux kernel - Handling ARM TrustZones - Stack Overflow It can access normal world CP15 registers while still having the sytem memory view of the secure world (will push the NS bit as 0). How to enable the TrustZone in ARM. Enable is a bit of an overloaded word. It is built into the CPU as unixsmurf points out. By default TrustZone enabled CPUs will boot in the secure world.