I have a quad-core ARM64 Cortex-A53 where 1 core is executing in EL3 while the other 3 cores are in EL1. The 3 cores in EL1 are spinning in a WFI loop. The EL3 CPU transitioned to EL3 as a result of the PSCI RESET2 call from Linux.
Is there a way for the EL3 core to switch the other cores into EL3 easily?
As far as I know, the communication between cores takes place through the IPI. Unfortunately, in my case, an SError has occurred that is masking the IPI.