linux-kernel - Re: [PATCH 0/2] cpupower: Allow control of boost feature on non-x86 based systems with boost support.

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Message-ID: <0053926a-7b0a-4e49-9acf-fcb1d73134cc@linuxfoundation.org>
Date: Wed, 18 Jun 2025 15:54:56 -0600
From: Shuah Khan <skhan@...uxfoundation.org>
To: "Shinji Nomoto (Fujitsu)" <fj5851bi@...itsu.com>,
 "'John B. Wyatt IV'" <jwyatt@...hat.com>
Cc: Thomas Renninger <trenn@...e.com>, Shuah Khan <shuah@...nel.org>,
 John Kacur <jkacur@...hat.com>,
 "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
 "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
 Shuah Khan <skhan@...uxfoundation.org>
Subject: Re: [PATCH 0/2] cpupower: Allow control of boost feature on non-x86
 based systems with boost support.

On 6/3/25 01:16, Shinji Nomoto (Fujitsu) wrote:
> John Wyatt wrote:
>> Hello Shinji, ty for your patch.
>>
>> On Thu, May 22, 2025 at 03:10:57PM +0900, Shinji Nomoto wrote:
>>> The cpufreq subsystem has a generic sysfs interface for controlling
>>> boost (/sys/devices/system/cpu/cpufreq/boost).
>>> The sysfs interface can be used to enable boost control from the
>>> cpupower command on non-x86 platforms as well. So, allow boost
>>> controlling on
>>> non-x86 system if boost sysfs file exists.
>>
>> Did you test this on non-x86 systems? If so, would you please provide details on those architectures and systems?
> 
> Hello,
> 
> This patch has been tested on Arm-based systems.
> 
> * It was tested on our internal simulator based on QEMU which supports boost.
> * It was tested on the Nvidia grace system (which does not support boost).
> * The cppc_cpufreq driver is working on both of the above systems.
> 
> We have also confirmed that it continues to work as expected on AMD systems.
> 

John,

Let me know if you are good with this testing details.

thanks,
-- Shuah