linux-kernel - Re: [PATCH v6 04/10] PM / EM: add support for other devices than CPUs in Energy Model

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Date:   Thu, 23 Apr 2020 19:15:26 +0200
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     Lukasz Luba <lukasz.luba@....com>
Cc:     linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
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Subject: Re: [PATCH v6 04/10] PM / EM: add support for other devices than CPUs
 in Energy Model

On 23/04/2020 18:57, Lukasz Luba wrote:
> 
> 
> On 4/23/20 4:12 PM, Daniel Lezcano wrote:
>> On Fri, Apr 10, 2020 at 09:42:04AM +0100, Lukasz Luba wrote:
>>> Add support for other devices that CPUs. The registration function
>>> does not require a valid cpumask pointer and is ready to handle new
>>> devices. Some of the internal structures has been reorganized in
>>> order to
>>> keep consistent view (like removing per_cpu pd pointers). To track usage
>>> of the Energy Model structures, they are protected with kref.
>>
>> Why not add the energy model structure in the struct device directly?
> 
> Do you mean this structure?
> https://elixir.bootlin.com/linux/latest/source/include/linux/device.h#L537
> 
> and to put something like:
> struct device {
> ...
>     struct dev_pm_domain    *pm_domain;
> #ifdef CONFIG_ENERGY_MODEL
>     struct em_perf_domain    *em_pd;
> #endif
> ...
> };

Yes, exactly.



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