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A.3.2. ARM Security ISA
The Arm® Cortex-A76 and Cortex A-55 cores implement the Armv8.2-A instruction sets with support for:
- Arm® TrustZone Technology
- Armv8-A Cryptographic extensions
Arm® TrustZone technology is an Arm® security enhancement that adds hardware security extensions to the Arm® instruction sets to provide a secure execution environment. The fundamental concept of TrustZone is the notion of core state which can be classified as secure versus non-secure. It also designates a portion of memory as secure memory. Access to secure state and secure memory is strictly controlled. More information about Arm® TrustZone can be found in ARM documentation.
Cryptographic extensions are described in sections 2.5.3.8 and 2.6.3.8.3 of this document. More information is available in this Arm® document: Arm® Cortex-A76 Core Cryptographic Extension Technical Reference Manual.