linux-kernel - Re: [PATCH v6 4/6] Documentation: amd_pstate: Move amd

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Date:   Thu, 16 Feb 2023 14:33:27 +0800
From:   Huang Rui <ray.huang@....com>
To:     "Karny, Wyes" <Wyes.Karny@....com>
Cc:     Rafael J Wysocki <rafael@...nel.org>,
        Jonathan Corbet <corbet@....net>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        "Limonciello, Mario" <Mario.Limonciello@....com>,
        "Yuan, Perry" <Perry.Yuan@....com>,
        "linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
        Bagas Sanjaya <bagasdotme@...il.com>,
        "Shukla, Santosh" <Santosh.Shukla@....com>,
        Len Brown <lenb@...nel.org>,
        Robert Moore <robert.moore@...el.com>,
        Borislav Petkov <bp@...en8.de>,
        "Narayan, Ananth" <Ananth.Narayan@....com>,
        "Shenoy, Gautham Ranjal" <gautham.shenoy@....com>,
        Tor Vic <torvic9@...lbox.org>
Subject: Re: [PATCH v6 4/6] Documentation: amd_pstate: Move amd_pstate param
 to alphabetical order

On Thu, Feb 16, 2023 at 02:12:53PM +0800, Huang Rui wrote:
> On Tue, Feb 07, 2023 at 01:21:55AM +0800, Karny, Wyes wrote:
> > Move amd_pstate command line param description to correct alphabetical
> > order.
> > 
> > Signed-off-by: Wyes Karny <wyes.karny@....com>
> > Reviewed-by: Mario Limonciello <mario.limonciello@....com>
> 
> Wyes, could you squeeze this minor patch to patch 3? I think we won't need
> an additional patch to fix alphabetical order in the documentation.

Alternative, you can move this patch prior patch3, then patch3 (guided
autonomous" can add the documentation in correct order.

Thanks,
Ray

> 
> Thanks,
> Ray
> 
> > ---
> >  .../admin-guide/kernel-parameters.txt         | 46 +++++++++----------
> >  1 file changed, 23 insertions(+), 23 deletions(-)
> > 
> > diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
> > index 56d5c189e458..d7685b4268ba 100644
> > --- a/Documentation/admin-guide/kernel-parameters.txt
> > +++ b/Documentation/admin-guide/kernel-parameters.txt
> > @@ -339,6 +339,29 @@
> >  			             This mode requires kvm-amd.avic=1.
> >  			             (Default when IOMMU HW support is present.)
> >  
> > +	amd_pstate=	[X86]
> > +			disable
> > +			  Do not enable amd_pstate as the default
> > +			  scaling driver for the supported processors
> > +			passive
> > +			  Use amd_pstate with passive mode as a scaling driver.
> > +			  In this mode autonomous selection is disabled.
> > +			  Driver requests a desired performance level and platform
> > +			  tries to match the same performance level if it is
> > +			  satisfied by guaranteed performance level.
> > +			active
> > +			  Use amd_pstate_epp driver instance as the scaling driver,
> > +			  driver provides a hint to the hardware if software wants
> > +			  to bias toward performance (0x0) or energy efficiency (0xff)
> > +			  to the CPPC firmware. then CPPC power algorithm will
> > +			  calculate the runtime workload and adjust the realtime cores
> > +			  frequency.
> > +			guided
> > +			  Activate guided autonomous mode. Driver requests minimum and
> > +			  maximum performance level and the platform autonomously
> > +			  selects a performance level in this range and appropriate
> > +			  to the current workload.
> > +
> >  	amijoy.map=	[HW,JOY] Amiga joystick support
> >  			Map of devices attached to JOY0DAT and JOY1DAT
> >  			Format: <a>,<b>
> > @@ -7009,26 +7032,3 @@
> >  				memory, and other data can't be written using
> >  				xmon commands.
> >  			off	xmon is disabled.
> > -
> > -	amd_pstate=	[X86]
> > -			disable
> > -			  Do not enable amd_pstate as the default
> > -			  scaling driver for the supported processors
> > -			passive
> > -			  Use amd_pstate with passive mode as a scaling driver.
> > -			  In this mode autonomous selection is disabled.
> > -			  Driver requests a desired performance level and platform
> > -			  tries to match the same performance level if it is
> > -			  satisfied by guaranteed performance level.
> > -			active
> > -			  Use amd_pstate_epp driver instance as the scaling driver,
> > -			  driver provides a hint to the hardware if software wants
> > -			  to bias toward performance (0x0) or energy efficiency (0xff)
> > -			  to the CPPC firmware. then CPPC power algorithm will
> > -			  calculate the runtime workload and adjust the realtime cores
> > -			  frequency.
> > -			guided
> > -			  Activate guided autonomous mode. Driver requests minimum and
> > -			  maximum performance level and the platform autonomously
> > -			  selects a performance level in this range and appropriate
> > -			  to the current workload.
> > -- 
> > 2.34.1
> >