Intel® Agilex™ Hard Processor System Technical Reference Manual

ID 683567
Date 2/14/2023
Public

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5.4.2. Exception Levels

The Cortex® -A53 MPCore™ CPUs support 4 exception levels:
  • EL0 has the lowest software execution privilege, and execution in EL0 is called unprivileged execution. This execution level may be used for application software.
  • EL1 provides support for operating systems.
  • EL2 provides support for processor virtualization or hypervisor mode.
  • EL3 provides support for the secure monitor.
As the exception level increases from 1 to 3, the software execution privilege increases.