instead of common PMU based profiling, I need Statistical Profiling Extension(inrtoduced in Armv8.2) / Branch Record Buffer Extension(inrtoduced in Armv9.2) to sample Branch Miss Predict & Last Level Cache Refill event precisely Using Software to enable the SPE feature on an Arm A-profile platform

According to this issue in Radxa’s EDK II repository, it should be possible to use SPE on the Orion O6 board as long as the firmware does a proper job of filling some ACPI tables in (or presenting a device tree with the appropriate entries, I suppose). Personally, I would be really interested in SPE…

Does FEAT_SPE/FEAT_BRBE supported by CD8180?

Orion Series

hrw November 5, 2025, 5:17pm 6

There is a post with output of my ArmCpuInfo tool:

BRBE is not supported.