Re: Warnings `Could not retrieve perf counters (-19)` and `amd_pstate: the _CPC object is not present in SBIOS or ACPI disabled` (Dell PowerEdge R7625, AMD EPYC 9174F)

[Mario Limonciello]

<snip>
> I made the service request 205423744 on February 12th, 2025, and after 
> collecting the details until February 14th, 2025, Dell replied on March 
> 4th, 2025, that there L3 support and engineering team was able to 
> reproduce the issue, and they are going to provide a firmware update, 
> currently estimated for June.
>
> I am still surprised, that Dell’s QA overlooked this. Does AMD provide 
> them test suites (does FWTS check for this). `dmesg --level=warning` is 
> unfortunately not empty, so maybe they ignore it.

IIRC FWTS doesn't test for this.  Perhaps you can add check to klog.json 
for the message you saw?  There is an existing pattern for a CPPC 
related error message:

https://github.com/fwts/fwts/blob/ec33c8ee1d99211a9cb2081324ec909a325e93d8/data/klog.json#L56

A similar pattern could be added for your case.

> Would it make sense to make the warning an error, so it’s less likely 
> overlooked?

If they don't run dmesg --level=warning, why would dmesg --level=error 
would be more likely to be run?

FWIW For 6.15 we're introducing another warning for BIOS failures.

https://web.git.kernel.org/pub/scm/linux/kernel/git/superm1/linux.git/commit/?h=linux-next&id=a9ba0fd452d82ca0da170eb6291aac01075a17d5