linux-kernel - RE: [PATCH v8 03/13] cpufreq: intel_pstate: use common macro definition for Energy Preference Performance(EPP)

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Date:   Fri, 23 Dec 2022 03:12:32 +0000
From:   "Yuan, Perry" <Perry.Yuan@....com>
To:     "Huang, Ray" <Ray.Huang@....com>
CC:     "rafael.j.wysocki@...el.com" <rafael.j.wysocki@...el.com>,
        "Limonciello, Mario" <Mario.Limonciello@....com>,
        "viresh.kumar@...aro.org" <viresh.kumar@...aro.org>,
        "Sharma, Deepak" <Deepak.Sharma@....com>,
        "Fontenot, Nathan" <Nathan.Fontenot@....com>,
        "Deucher, Alexander" <Alexander.Deucher@....com>,
        "Huang, Shimmer" <Shimmer.Huang@....com>,
        "Du, Xiaojian" <Xiaojian.Du@....com>,
        "Meng, Li (Jassmine)" <Li.Meng@....com>,
        "Karny, Wyes" <Wyes.Karny@....com>,
        "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v8 03/13] cpufreq: intel_pstate: use common macro
 definition for Energy Preference Performance(EPP)

[AMD Official Use Only - General]



> -----Original Message-----
> From: Huang, Ray <Ray.Huang@....com>
> Sent: Friday, December 23, 2022 11:10 AM
> To: Yuan, Perry <Perry.Yuan@....com>
> Cc: rafael.j.wysocki@...el.com; Limonciello, Mario
> <Mario.Limonciello@....com>; viresh.kumar@...aro.org; Sharma, Deepak
> <Deepak.Sharma@....com>; Fontenot, Nathan
> <Nathan.Fontenot@....com>; Deucher, Alexander
> <Alexander.Deucher@....com>; Huang, Shimmer
> <Shimmer.Huang@....com>; Du, Xiaojian <Xiaojian.Du@....com>; Meng,
> Li (Jassmine) <Li.Meng@....com>; Karny, Wyes <Wyes.Karny@....com>;
> linux-pm@...r.kernel.org; linux-kernel@...r.kernel.org
> Subject: Re: [PATCH v8 03/13] cpufreq: intel_pstate: use common macro
> definition for Energy Preference Performance(EPP)
> 
> On Mon, Dec 19, 2022 at 02:40:32PM +0800, Yuan, Perry wrote:
> > make the energy preference performance strings and profiles using one
> > common header for intel_pstate driver, then the amd_pstate epp driver
> > can use the common header as well. This will simpify the intel_pstate
> > and amd_pstate driver.
> >
> > Signed-off-by: Perry Yuan <perry.yuan@....com>
> > ---
> >  drivers/cpufreq/intel_pstate.c | 13 +++----------
> >  include/linux/cpufreq.h        | 11 +++++++++++
> >  2 files changed, 14 insertions(+), 10 deletions(-)
> >
> > diff --git a/drivers/cpufreq/intel_pstate.c
> > b/drivers/cpufreq/intel_pstate.c index ad9be31753b6..93a60fdac0fc
> > 100644
> > --- a/drivers/cpufreq/intel_pstate.c
> > +++ b/drivers/cpufreq/intel_pstate.c
> > @@ -640,15 +640,7 @@ static int intel_pstate_set_epb(int cpu, s16 pref)
> >   *	4		power
> >   */
> >
> > -enum energy_perf_value_index {
> > -	EPP_INDEX_DEFAULT = 0,
> > -	EPP_INDEX_PERFORMANCE,
> > -	EPP_INDEX_BALANCE_PERFORMANCE,
> > -	EPP_INDEX_BALANCE_POWERSAVE,
> > -	EPP_INDEX_POWERSAVE,
> > -};
> > -
> > -static const char * const energy_perf_strings[] = {
> > +const char * const energy_perf_strings[] = {
> >  	[EPP_INDEX_DEFAULT] = "default",
> >  	[EPP_INDEX_PERFORMANCE] = "performance",
> >  	[EPP_INDEX_BALANCE_PERFORMANCE] = "balance_performance",
> @@ -656,7
> > +648,8 @@ static const char * const energy_perf_strings[] = {
> >  	[EPP_INDEX_POWERSAVE] = "power",
> >  	NULL
> >  };
> > -static unsigned int epp_values[] = {
> > +
> > +unsigned int epp_values[] = {
> >  	[EPP_INDEX_DEFAULT] = 0, /* Unused index */
> >  	[EPP_INDEX_PERFORMANCE] = HWP_EPP_PERFORMANCE,
> >  	[EPP_INDEX_BALANCE_PERFORMANCE] =
> HWP_EPP_BALANCE_PERFORMANCE, diff
> > --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h index
> > d5595d57f4e5..e63309d497fe 100644
> > --- a/include/linux/cpufreq.h
> > +++ b/include/linux/cpufreq.h
> > @@ -20,6 +20,7 @@
> >  #include <linux/pm_qos.h>
> >  #include <linux/spinlock.h>
> >  #include <linux/sysfs.h>
> > +#include <asm/msr.h>
> 
> Please don't include msr header in cpufreq common file, we already include
> it in amd-pstate.c, that's fairly enough.
> 
> Thanks,
> Ray

Good , will remove the msr.h from this file.
Thank you.

Perry.

> 
> >
> >
> /**********************************************************
> ***********
> >   *                        CPUFREQ INTERFACE                          *
> > @@ -185,6 +186,16 @@ struct cpufreq_freqs {
> >  	u8 flags;		/* flags of cpufreq_driver, see below. */
> >  };
> >
> > +enum energy_perf_value_index {
> > +	EPP_INDEX_DEFAULT = 0,
> > +	EPP_INDEX_PERFORMANCE,
> > +	EPP_INDEX_BALANCE_PERFORMANCE,
> > +	EPP_INDEX_BALANCE_POWERSAVE,
> > +	EPP_INDEX_POWERSAVE,
> > +};
> > +extern const char * const energy_perf_strings[]; extern unsigned int
> > +epp_values[];
> > +
> >  /* Only for ACPI */
> >  #define CPUFREQ_SHARED_TYPE_NONE (0) /* None */
> >  #define CPUFREQ_SHARED_TYPE_HW	 (1) /* HW does needed
> coordination */
> > --
> > 2.34.1
> >