• Purpose of EL0 EL1 ..
    Hi all, ARMV8 has number of exception levels as EL0 , EL1, EL2, EL3 .. How this is managed and what is the exact use case of the same ?
  • aarch64 Exception Level Sw itch from EL1 to EL0
    Hi Expert, I am working on a simple kernel and test it on Qemu which supports RasPi3. During the boot level. Ras Pi goes to EL3 level, and I set spsr_el3 to 1 and elr_el3 to kernel_main and then use...
  • Can I detect from which mode (EL1, EL0,...) SError interrupt was caused?
    Dear all, As I know there are separate vectors to handle SError caused by EL0 and EL1. My queston is follow: Due to fact that SError is asynchronous, can I rely on fact that if cpu entered serror_el1_vector...
  • What are the necessary preconditions to load a guest into EL1 from EL2?
    I have successfully moved from EL3 to EL2. After doing some initialization I am trying to move from EL2 into EL1 with a very simple guest image. My process looks like: Map EL1 memory into EL2 ...
  • How to know if the processor is in EL0 state on armv8?
    Hi Fellows, I want to determine in code, if the processor is in EL0 mode or not. I read CurrentEL register to do this but if my code is running from EL0, it throws an exception since we can't access...