Re: [Question] Enabling CoreSight TRBE in firmware on CIX Orion O6

[Leo Yan]

On Wed, Jun 10, 2026 at 03:42:25PM +0800, Gary Yang wrote:

[...]

> >   (2) Or expose the full CoreSight topology in ACPI:
> >      - Add ARMHC97C (TMC-ETR) device with MMIO base address
> >      - Add ARMHC502 (funnel) devices if applicable
> >      - Reference: ARM DEN0067 (CoreSight Architecture ACPI bindings)

The CPUs on O6 support ETE + TRBE, you don't need to use ETR or funnel
modules.

> The firmware (TF-A) for the Radxa O6 is provided and maintained by Radxa. We 
> will forward your request to the Radxa firmware team and ask them to evaluate 
> enabling TRBE access from non-secure EL1/EL2 (i.e. setting MDCR_EL3.NSTBE = 1 
> in TF-A), as you suggested.

The issue is caused by ACPI: the APIC table does not contain a TRBE
interrupt, and the SSDT is missing ETE nodes (ETE node should be
present for each CPU):

  Device (CPU0)
  {
    ...

    Device ( ETE0 ) {
        Name (_UID, Zero)
        Name (_HID , "ARMHC500")
    }
  }

Thanks,
Leo