port-evbarm/55262: BeagleBone Black setting machdep.cpufreq.cpu0.target results in a hard lockup

[cryintothebluesky%gmail.com@localhost]

>Number:         55262
>Category:       port-evbarm
>Synopsis:       BeagleBone Black setting machdep.cpufreq.cpu0.target results in a hard lockup
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    port-evbarm-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu May 14 16:20:00 +0000 2020
>Originator:     Sad Clouds
>Release:        9.0
>Organization:
>Environment:
>Description:
$ sysctl -a | grep freq
machdep.cpufreq.cpu0.target = 1000
machdep.cpufreq.cpu0.current = 1000
machdep.cpufreq.cpu0.available = 720 600 500

Setting "machdep.cpufreq.cpu0.target" to anything other than 1000 results in a hard lockup.

Also for some reason, machdep.cpufreq.cpu0.available does not list 1000 frequency.
>How-To-Repeat:

>Fix: