Agilex™ 5 ES Device Errata and User Guidelines

ID 825514
Date 12/09/2024
Public
Document Table of Contents

3.2.16. 2238117: Reads of DISR_EL1 incorrectly return 0s while in Debug State

Description

When the Processing Element (PE) is in Debug State, reads of DISR_EL1 from EL1 or EL2 with SCR_EL3.EA=0x1 will incorrectly return 0s.

Conditions

  1. The PE is executing in Debug State at EL1 or EL2, with SCR_EL3.EA=0x1.
  2. The PE executes an MRS to DISR_EL1.

Impact

If the above conditions are met, then the read of DISR_EL1 will incorrectly return 0s.

Workaround

No workaround is expected to be required.

Category

Category C