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From: Huang Rui <ray.huang@amd.com>
To: Shuah Khan <skhan@linuxfoundation.org>
Cc: "Rafael J . Wysocki" <rafael.j.wysocki@intel.com>,
	Viresh Kumar <viresh.kumar@linaro.org>,
	Borislav Petkov <bp@suse.de>, Ingo Molnar <mingo@kernel.org>,
	"linux-pm@vger.kernel.org" <linux-pm@vger.kernel.org>,
	"Sharma, Deepak" <Deepak.Sharma@amd.com>,
	"Deucher, Alexander" <Alexander.Deucher@amd.com>,
	"Limonciello, Mario" <Mario.Limonciello@amd.com>,
	"Fontenot, Nathan" <Nathan.Fontenot@amd.com>,
	"Su, Jinzhou (Joe)" <Jinzhou.Su@amd.com>,
	"Du, Xiaojian" <Xiaojian.Du@amd.com>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"x86@kernel.org" <x86@kernel.org>
Subject: Re: [PATCH 15/19] cpupower: add amd-pstate sysfs entries into libcpufreq
Date: Thu, 16 Sep 2021 16:47:04 +0800	[thread overview]
Message-ID: <20210916084704.GA3755511@hr-amd> (raw)
In-Reply-To: <870445a1-1148-e5d1-08f8-df630466d788@linuxfoundation.org>

On Fri, Sep 10, 2021 at 06:26:06AM +0800, Shuah Khan wrote:
> On 9/8/21 8:59 AM, Huang Rui wrote:
> > These amd-pstate sysfs entries will be used on cpupower for amd-pstate
> > kernel module.
> > 
> 
> This commit log doesn't make sense. If these sysfs entries are used
> for amd-pstate kernel module, why are they defined here.
> 
> Describe how these are used and the relationship between these defines
> and the amd-pstate kernel module
> 
> > Signed-off-by: Huang Rui <ray.huang@amd.com>
> > ---
> >   tools/power/cpupower/lib/cpufreq.c | 18 +++++++++++++++++-
> >   1 file changed, 17 insertions(+), 1 deletion(-)
> > 
> > diff --git a/tools/power/cpupower/lib/cpufreq.c b/tools/power/cpupower/lib/cpufreq.c
> > index c3b56db8b921..3f92ddadaad2 100644
> > --- a/tools/power/cpupower/lib/cpufreq.c
> > +++ b/tools/power/cpupower/lib/cpufreq.c
> > @@ -69,6 +69,14 @@ enum cpufreq_value {
> >   	SCALING_MIN_FREQ,
> >   	SCALING_MAX_FREQ,
> >   	STATS_NUM_TRANSITIONS,
> > +	AMD_PSTATE_HIGHEST_PERF,
> > +	AMD_PSTATE_NOMINAL_PERF,
> > +	AMD_PSTATE_LOWEST_NONLINEAR_PERF,
> > +	AMD_PSTATE_LOWEST_PERF,
> > +	AMD_PSTATE_MAX_FREQ,
> > +	AMD_PSTATE_NOMINAL_FREQ,
> > +	AMD_PSTATE_LOWEST_NONLINEAR_FREQ,
> > +	AMD_PSTATE_MIN_FREQ,
> >   	MAX_CPUFREQ_VALUE_READ_FILES
> >   };
> >   
> 
> These are AMD specific values being added to a common code.
> 
> > @@ -80,7 +88,15 @@ static const char *cpufreq_value_files[MAX_CPUFREQ_VALUE_READ_FILES] = {
> >   	[SCALING_CUR_FREQ] = "scaling_cur_freq",
> >   	[SCALING_MIN_FREQ] = "scaling_min_freq",
> >   	[SCALING_MAX_FREQ] = "scaling_max_freq",
> > -	[STATS_NUM_TRANSITIONS] = "stats/total_trans"
> > +	[STATS_NUM_TRANSITIONS] = "stats/total_trans",
> > +	[AMD_PSTATE_HIGHEST_PERF] = "amd_pstate_highest_perf",
> > +	[AMD_PSTATE_NOMINAL_PERF] = "amd_pstate_nominal_perf",
> > +	[AMD_PSTATE_LOWEST_NONLINEAR_PERF] = "amd_pstate_lowest_nonlinear_perf",
> > +	[AMD_PSTATE_LOWEST_PERF] = "amd_pstate_lowest_perf",
> > +	[AMD_PSTATE_MAX_FREQ] = "amd_pstate_max_freq",
> > +	[AMD_PSTATE_NOMINAL_FREQ] = "amd_pstate_nominal_freq",
> > +	[AMD_PSTATE_LOWEST_NONLINEAR_FREQ] = "amd_pstate_lowest_nonlinear_freq",
> > +	[AMD_PSTATE_MIN_FREQ] = "amd_pstate_min_freq"
> >   };
> >   
> >   
> > 
> 
> These are AMD specific values being added to a common code.
> It doesn't sound right. What happens if there is a conflict
> between AMD values and another vendor values?
> 
> This doesn't seem a good place to add these.
> 

Shuah, thanks for your suggestion, I went through the cpupower patches
again. And yes, we should not combine the amd specific and common things
together.

Could I expose a simliar sysfs_cpufreq_get_one_value in cpupower_intern.h
header, and move amd_pstate_* function implementation into
utils/helpers/amd.c? It can keep the lib/cpufreq still general.

Thanks,
Ray

  reply	other threads:[~2021-09-16  8:47 UTC|newest]

Thread overview: 59+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-08 14:59 [PATCH 00/19] cpufreq: introduce a new AMD CPU frequency control mechanism Huang Rui
2021-09-08 14:59 ` [PATCH 01/19] x86/cpufreatures: add AMD CPPC extension feature flag Huang Rui
2021-09-08 20:00   ` Shuah Khan
2021-09-09  9:45     ` Huang Rui
2021-09-09 17:58   ` Borislav Petkov
2021-09-13  9:48     ` Huang Rui
2021-09-13 13:04       ` Borislav Petkov
2021-09-16  9:30         ` Huang Rui
2021-09-08 14:59 ` [PATCH 02/19] x86/msr: add AMD CPPC MSR definitions Huang Rui
2021-09-08 14:59 ` [PATCH 03/19] ACPI: CPPC: add cppc enable register function Huang Rui
2021-09-08 19:14   ` Fontenot, Nathan
2021-09-09  9:50     ` Huang Rui
2021-09-09  0:21   ` Shuah Khan
2021-09-09  9:58     ` Huang Rui
2021-09-08 14:59 ` [PATCH 04/19] cpufreq: amd: introduce a new amd pstate driver to support future processors Huang Rui
2021-09-09 15:01   ` Peter Zijlstra
2021-09-13  8:11     ` Huang Rui
2021-09-13  8:56       ` Peter Zijlstra
2021-09-13 10:54         ` Huang Rui
2021-09-13 11:56           ` Peter Zijlstra
2021-09-16 10:09             ` Huang Rui
2021-09-16 11:19               ` Rafael J. Wysocki
2021-09-17  3:41                 ` Huang Rui
2021-09-09 15:03   ` Peter Zijlstra
2021-09-13 11:55     ` Huang Rui
2021-09-09 19:31   ` Fontenot, Nathan
2021-09-13 11:18     ` Huang Rui
2021-09-08 14:59 ` [PATCH 05/19] cpufreq: amd: add fast switch function for amd-pstate module Huang Rui
2021-09-08 14:59 ` [PATCH 06/19] cpufreq: amd: add acpi cppc function as the backend for legacy processors Huang Rui
2021-09-08 14:59 ` [PATCH 07/19] cpufreq: amd: add trace for amd-pstate module Huang Rui
2021-09-08 14:59 ` [PATCH 08/19] cpufreq: amd: add boost mode support for amd-pstate Huang Rui
2021-09-08 18:24   ` Fontenot, Nathan
2021-09-09 10:12     ` Huang Rui
2021-09-08 14:59 ` [PATCH 09/19] cpufreq: amd: add amd-pstate checking support check attribute Huang Rui
2021-09-08 14:59 ` [PATCH 10/19] cpufreq: amd: add amd-pstate frequencies attributes Huang Rui
2021-09-08 18:13   ` Fontenot, Nathan
2021-09-08 14:59 ` [PATCH 11/19] cpufreq: amd: add amd-pstate performance attributes Huang Rui
2021-09-08 18:20   ` Fontenot, Nathan
2021-09-08 14:59 ` [PATCH 12/19] cpupower: add AMD P-state capability flag Huang Rui
2021-09-08 14:59 ` [PATCH 13/19] cpupower: add the function to check amd-pstate enabled Huang Rui
2021-09-09 22:16   ` Shuah Khan
2021-09-13 11:29     ` Huang Rui
2021-09-08 14:59 ` [PATCH 14/19] cpupower: initial AMD P-state capability Huang Rui
2021-09-09 22:16   ` Shuah Khan
2021-09-13 12:58     ` Huang Rui
2021-09-08 14:59 ` [PATCH 15/19] cpupower: add amd-pstate sysfs entries into libcpufreq Huang Rui
2021-09-09 22:26   ` Shuah Khan
2021-09-16  8:47     ` Huang Rui [this message]
2021-09-08 14:59 ` [PATCH 16/19] cpupower: enable boost state support for amd-pstate module Huang Rui
2021-09-08 17:32   ` Fontenot, Nathan
2021-09-09  9:59     ` Huang Rui
2021-09-09 22:42   ` Shuah Khan
2021-09-16  9:27     ` Huang Rui
2021-09-08 14:59 ` [PATCH 17/19] cpupower: add amd-pstate get data function to query the info Huang Rui
2021-09-09 22:45   ` Shuah Khan
2021-09-08 15:00 ` [PATCH 18/19] cpupower: print amd-pstate information on cpupower Huang Rui
2021-09-09 22:46   ` Shuah Khan
2021-09-16  9:29     ` Huang Rui
2021-09-08 15:00 ` [PATCH 19/19] Documentation: amd-pstate: add amd-pstate driver introduction Huang Rui

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