linux-kernel - Re: [PATCH v3 04/10] cpufreq: amd-pstate: add debug message while CPPC is supported and disabled by SBIOS

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Date: Wed, 12 Jun 2024 13:34:31 +0530
From: Gautham R.Shenoy <gautham.shenoy@....com>
To: Perry Yuan <perry.yuan@....com>, <Mario.Limonciello@....com>
CC: <rafael.j.wysocki@...el.com>, <viresh.kumar@...aro.org>,
	<Ray.Huang@....com>, <Borislav.Petkov@....com>, <Alexander.Deucher@....com>,
	<Xinmei.Huang@....com>, <Xiaojian.Du@....com>, <Li.Meng@....com>,
	<linux-pm@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 04/10] cpufreq: amd-pstate: add debug message while
 CPPC is supported and disabled by SBIOS

Perry Yuan <perry.yuan@....com> writes:

> If CPPC feature is supported by the CPU however the CPUID flag bit is not
> set by SBIOS, the `amd_pstate` will be failed to load while system
> booting.
> So adding one more debug message to inform user to check the SBIOS setting,
> The change also can help maintainers to debug why amd_pstate driver failed
> to be loaded at system booting if the processor support CPPC.
>
> Closes: https://bugzilla.kernel.org/show_bug.cgi?id=218686
> Signed-off-by: Perry Yuan <perry.yuan@....com>

Reviewed-by: Gautham R. Shenoy <gautham.shenoy@....com>

--
Thanks and Regards
gautham