linux-kernel - RE: [PATCH 1/7] cpufreq: amd-pstate: remove set

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Date: Mon, 29 Jan 2024 04:46:52 +0000
From: "Yuan, Perry" <Perry.Yuan@....com>
To: "Limonciello, Mario" <Mario.Limonciello@....com>,
	"rafael.j.wysocki@...el.com" <rafael.j.wysocki@...el.com>,
	"viresh.kumar@...aro.org" <viresh.kumar@...aro.org>, "Huang, Ray"
	<Ray.Huang@....com>, "Shenoy, Gautham Ranjal" <gautham.shenoy@....com>,
	"Petkov, Borislav" <Borislav.Petkov@....com>
CC: "Deucher, Alexander" <Alexander.Deucher@....com>, "Huang, Shimmer"
	<Shimmer.Huang@....com>, "Du, Xiaojian" <Xiaojian.Du@....com>, "Meng, Li
 (Jassmine)" <Li.Meng@....com>, "linux-pm@...r.kernel.org"
	<linux-pm@...r.kernel.org>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 1/7] cpufreq: amd-pstate: remove set_boost callback for
 passive mode

[AMD Official Use Only - General]

Hi Mario,

> -----Original Message-----
> From: Limonciello, Mario <Mario.Limonciello@....com>
> Sent: Friday, January 26, 2024 11:45 PM
> To: Yuan, Perry <Perry.Yuan@....com>; rafael.j.wysocki@...el.com;
> viresh.kumar@...aro.org; Huang, Ray <Ray.Huang@....com>; Shenoy,
> Gautham Ranjal <gautham.shenoy@....com>; Petkov, Borislav
> <Borislav.Petkov@....com>
> Cc: Deucher, Alexander <Alexander.Deucher@....com>; Huang, Shimmer
> <Shimmer.Huang@....com>; Du, Xiaojian <Xiaojian.Du@....com>; Meng,
> Li (Jassmine) <Li.Meng@....com>; linux-pm@...r.kernel.org; linux-
> kernel@...r.kernel.org
> Subject: Re: [PATCH 1/7] cpufreq: amd-pstate: remove set_boost callback for
> passive mode
>
> On 1/26/2024 02:08, Perry Yuan wrote:
> > From: Perry Yuan <Perry.Yuan@....com>
> >
> > The following patches will enable `amd-pstate` CPU boost control
> > method
> When it's committed it won't be a patch.  How about instead "A specific amd-
> pstate CPU boost control method is to be introduced and the legacy callback
> doesn't make sense" or something along those lines.
>
> Also; is the ordering correct?  In terms of bisectability should this come after
> the new one is introduced perhaps?

I move the patch to the end of the series and update the commit info like you suggested.
Thank you for the feedback.

Regards.
Perry

>
> > which will not need this common boost control callback anymore, so we
> > remove the legacy set_boost interface from amd-pstate driver.
> >
> > Signed-off-by: Perry Yuan <Perry.Yuan@....com>
> > ---
> >   drivers/cpufreq/amd-pstate.c | 26 --------------------------
> >   1 file changed, 26 deletions(-)
> >
> > diff --git a/drivers/cpufreq/amd-pstate.c
> > b/drivers/cpufreq/amd-pstate.c index 9a1e194d5cf8..8f308f56ade6
> 100644
> > --- a/drivers/cpufreq/amd-pstate.c
> > +++ b/drivers/cpufreq/amd-pstate.c
> > @@ -632,31 +632,6 @@ static int amd_get_lowest_nonlinear_freq(struct
> amd_cpudata *cpudata)
> >     return lowest_nonlinear_freq * 1000;
> >   }
> >
> > -static int amd_pstate_set_boost(struct cpufreq_policy *policy, int
> > state) -{
> > -   struct amd_cpudata *cpudata = policy->driver_data;
> > -   int ret;
> > -
> > -   if (!cpudata->boost_supported) {
> > -           pr_err("Boost mode is not supported by this processor or
> SBIOS\n");
> > -           return -EINVAL;
> > -   }
> > -
> > -   if (state)
> > -           policy->cpuinfo.max_freq = cpudata->max_freq;
> > -   else
> > -           policy->cpuinfo.max_freq = cpudata->nominal_freq;
> > -
> > -   policy->max = policy->cpuinfo.max_freq;
> > -
> > -   ret = freq_qos_update_request(&cpudata->req[1],
> > -                                 policy->cpuinfo.max_freq);
> > -   if (ret < 0)
> > -           return ret;
> > -
> > -   return 0;
> > -}
> > -
> >   static void amd_pstate_boost_init(struct amd_cpudata *cpudata)
> >   {
> >     u32 highest_perf, nominal_perf;
> > @@ -1391,7 +1366,6 @@ static struct cpufreq_driver amd_pstate_driver =
> {
> >     .exit           = amd_pstate_cpu_exit,
> >     .suspend        = amd_pstate_cpu_suspend,
> >     .resume         = amd_pstate_cpu_resume,
> > -   .set_boost      = amd_pstate_set_boost,
> >     .name           = "amd-pstate",
> >     .attr           = amd_pstate_attr,
> >   };