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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 Thanks, Gary and Leo. I'm looking forward to adding arm64 CoreSight usage on CIX Orion O6 board. If the board supports CoreSight, I'll make sure to write on the perf tools Wiki: https://perf.wiki.kernel.org/index.php/Main_Page Best regards, Yunseong