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From:   "Yuan, Perry" <Perry.Yuan@amd.com>
To:     Thomas Koch <linrunner@gmx.net>
CC:     "Deucher, Alexander" <Alexander.Deucher@amd.com>,
        "Sharma, Deepak" <Deepak.Sharma@amd.com>,
        "Meng, Li (Jassmine)" <Li.Meng@amd.com>,
        "Limonciello, Mario" <Mario.Limonciello@amd.com>,
        "Fontenot, Nathan" <Nathan.Fontenot@amd.com>,
        "Huang, Shimmer" <Shimmer.Huang@amd.com>,
        "Du, Xiaojian" <Xiaojian.Du@amd.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
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        "rafael.j.wysocki@intel.com" <rafael.j.wysocki@intel.com>,
        "Huang, Ray" <Ray.Huang@amd.com>,
        "viresh.kumar@linaro.org" <viresh.kumar@linaro.org>,
        "Karny, Wyes" <Wyes.Karny@amd.com>
Subject: RE: [PATCH v7 08/13] cpufreq: amd-pstate: add frequency dynamic boost
 sysfs control
Thread-Topic: [PATCH v7 08/13] cpufreq: amd-pstate: add frequency dynamic
 boost sysfs control
Thread-Index: AQHZCvcYuxn3xMgAyUuU0alA0/p6DK5zn2sAgAE3P9A=
Date:   Mon, 19 Dec 2022 06:56:16 +0000
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References: <20221208111852.386731-9-perry.yuan@amd.com>
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[AMD Official Use Only - General]

Hi Thomas

> -----Original Message-----
> From: Thomas Koch <linrunner@gmx.net>
> Sent: Sunday, December 18, 2022 8:17 PM
> To: Yuan, Perry <Perry.Yuan@amd.com>
> Cc: Deucher, Alexander <Alexander.Deucher@amd.com>; Sharma, Deepak
> <Deepak.Sharma@amd.com>; Meng, Li (Jassmine) <Li.Meng@amd.com>;
> Limonciello, Mario <Mario.Limonciello@amd.com>; Fontenot, Nathan
> <Nathan.Fontenot@amd.com>; Huang, Shimmer
> <Shimmer.Huang@amd.com>; Du, Xiaojian <Xiaojian.Du@amd.com>; linux-
> kernel@vger.kernel.org; linux-pm@vger.kernel.org;
> rafael.j.wysocki@intel.com; Huang, Ray <Ray.Huang@amd.com>;
> viresh.kumar@linaro.org; Karny, Wyes <Wyes.Karny@amd.com>
> Subject: Re: [PATCH v7 08/13] cpufreq: amd-pstate: add frequency dynamic
> boost sysfs control
>=20
> Hi Perry,
>=20
> in amd_pstate active mode, where is the equivalent to
> /sys/devices/system/cpu/cpufreq/boost?
>=20
> Is it /sys/devices/system/cpu/amd-pstate/cppc_dynamic_boost or
> something else?
>=20
> --
> Freundliche Gr=FC=DFe / Kind regards,
> Thomas Koch

In the EPP driver mode, there is no frequency boost options to control for =
user end currently, the boost is created for the iowait boost feature.
The CPU cores scaling range is controlled by the lowlevel firmware.=20
Next, we will consider adding interface to influence the Min/Max Frequency =
if customers need that.

Perry.

>=20
> Mail : linrunner@gmx.net
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