Revision as of 13:14, 1 March 2023 by Registered User (→What is the Isolation)
1. What is the Isolation
- HW Isolation
- HW isolation mechanisms are used to isolate almost 2 sub-systems. HW isolation is combined with software solution to implement the isolation
- HW isolation mechanisms allowing to
- isolate (access control): Secure, Non-secure, Priviledge, Unpriviledge, …
- filter: on memory access,
- HW isolation mechanisms allowing to
- HW isolation mechanisms are used to isolate almost 2 sub-systems. HW isolation is combined with software solution to implement the isolation
- Typical examples are MPU, TrustZone, Firewall, …
- Temporal Isolation
- Considered only during the sequential flow executed at boot of the system, where the different stages executed can be isolated.
Temporal isolation protects sensitive device assets that are used during the secure boot process, from access by later stages.
- Runtime Isolation
- Is the ability to have a system with several sub-systems running in parallel, considering 2, 3, 4, … sub-systems of a platform.
- Isolating 2 sub-systems can be done using Trust-Zone technology from ARM architecture.
- Runtime Isolation
But it could be done also considering integration of 2 cores, use of the MPU (on Cortex-M cores), …
- Software IP isolation
2. References