[Bug 249864] [amdtemp] does not recognize AMD Ryzen 9 4900H

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=249864

            Bug ID: 249864
           Summary: [amdtemp] does not recognize AMD Ryzen 9 4900H
           Product: Base System
           Version: CURRENT
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: bugs at FreeBSD.org
          Reporter: florian.millet at laposte.net

Created attachment 218258
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=218258&action=edit
dmesg CPU info

Hello everyone,

It would seems that FreeBSD amdtemp driver does not yet recognize AMD Ryzen 9
4900H processor. 
When doing a sysctl dev.cpu.0 on a FreeBSD current at svn revision r365451 it
shows :

dev.cpu.0.cx_method: C1/hlt C2/io C3/io
dev.cpu.0.cx_usage_counters: 817664 0 0
dev.cpu.0.cx_usage: 100.00% 0.00% 0.00% last 433us
dev.cpu.0.cx_lowest: C1
dev.cpu.0.cx_supported: C1/1/1 C2/2/400 C3/3/350
dev.cpu.0.freq_levels: 3300/4021 1700/1615 1400/1277
dev.cpu.0.freq: 3300
dev.cpu.0.%parent: acpi0
dev.cpu.0.%pnpinfo: _HID=ACPI0007 _UID=1 _CID=none
dev.cpu.0.%location: handle=\_SB_.PLTF.P000
dev.cpu.0.%driver: cpu
dev.cpu.0.%desc: ACPI CPU

There is no temperature reported, No dev.cpu.*.temperature sysctl are present
while amdtemp is loaded.
I assume all 3rd gen Ryzen processors are in the same boat.
This is on a Asus TUF A17 Notebook.

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