• How to use ETM to trace PMU events?
    According to the manual, we can select PMU events as external input resource of ETM. However, the manual does not describe it in detail, and my attempts also failed. To perform the experiment, i configure...
  • Can I make ETM and PMU secure access only?
    ARMv8 manual says that we can make system register access to trace registers and PMU registers trap to EL3. However, ETM and PMU in Juno can be accessed through memory-mapping interface. Is there anyway...
  • How to check the enable status in ETM v3.3
    Hi all, I am trying to use the ETM on iMX53 qsb, which contains a Cortex-A8 processor. In the board, the trace result of the ETM is outputted to both ETB and TPIU via an ATB replicator, looks like the...
  • Accessing coresight debug and trace memory region in EL3 leads to stuck.
    The manual tells that I can use ETM in both self-host debugging and external debugging. With DStream and DS-5, the ETM works well. However, i find that i can not modify the tracing registers in DS-5,...
  • Confused by OS Lock in Juno board
    Hi all, I am using 64-bit android on Juno r1 board, and get confused by the OS Lock when playing with ETM. The armv8 manual tells that the OS lock is used to restrict the external debugger, and can...