SemiAccurate posted an article on this:
Looks like it's supported on Thuban and Zosma.Hi all,
here's a small patchset that implements two new performance-related
features on AMD: Core Performance Boost and Effective Frequency
reporting (APERF/MPERF). Details for each are to be found in the
respective commit messages, as Andrew requested .
5/5 overloads the /sys/devices/system/cpu/cpu3/cpufreq/scaling_cur_freq
interface to show the actual core frequency when boosting. Let me know
if the way it is done is agreeable.