linux-kernel - Re: [PATCH] arm64: topology: Cleanup init_amu

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Message-ID: <20201211110555.ht3stotrpbkkdxju@vireshk-i7>
Date:   Fri, 11 Dec 2020 16:35:55 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Ionela Voinescu <ionela.voinescu@....com>
Cc:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: topology: Cleanup init_amu_fie() a bit

On 10-12-20, 10:38, Ionela Voinescu wrote:
> Basically, that's functions purpose is only to make sure that invariance
> at the level of the policy is consistent: either all CPUs in a policy
> support counters and counters will be used for the scale factor, or
> either none or only some support counters and therefore the default
> cpufreq implementation will be used (arch_set_freq_scale()) for all CPUs
> in a policy.

Why is it important to have this thing at policy level ? If we are
okay with only one policy having AMUs and not the other one, then what
about only some CPUs of both the policies having it. Does it break
anything ?

-- 
viresh