linux-kernel - Re: [PATCH 0/4] cpufreq: qcom-hw: LMH irq/hotplug interractions

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Message-ID: <a9ab7982-b235-ef5f-2c1b-ecbc421552d1@arm.com>
Date:   Mon, 4 Jul 2022 11:55:44 +0200
From:   Pierre Gondois <pierre.gondois@....com>
To:     linux-kernel@...r.kernel.org
Cc:     Ionela.Voinescu@....com, Dietmar.Eggemann@....com,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Vladimir Zapolskiy <vladimir.zapolskiy@...aro.org>,
        linux-pm@...r.kernel.org, linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH 0/4] cpufreq: qcom-hw: LMH irq/hotplug interractions

Hello,
I saw that:
https://lore.kernel.org/all/20220617064421.l4vshytmqtittzee@vireshk-i7/

was applied, so this patch-set would need to be rebased. Please let me
know if you think it requires modifications before it gets rebased,

Regards,
Pierre

On 6/15/22 16:43, Pierre Gondois wrote:
> This patch-set provides fixes for the qcom-cpufreq-hw driver regarding
> LMH irqs configurations and (un)plugging CPUs.
> commit ffd6cc92ab9c ("arm64: dts: qcom: sm8250: add description of dcvsh interrupts")
> enables DCVS (Dynamic Clock and Voltage Scaling) for sm8250 chips
> (so rb5 included). As no LMH (Limits Management Hardware) interrupts
> were seen, the firmware used for testing should not be able support
> them.
> 
> The patch-set was tested on a rb5 with an old firmware version:
> UEFI Ver    : 5.0.210817.BOOT.XF.3.2-00354-SM8250-1
> Build Info  : 64b Aug 17 2021 23:35:39
> 
> This patch-set should still contain relevant modifications regarding
> LMH interrupts and CPU hotplug. Still, it would be good to test
> it on a platform which actually uses LMH interrupts.
> 
> LMH irqs can be identified with:
>    cat /proc/interrupts | grep "dcvsh\-irq"
> and their configuration can be seen at:
>    /proc/irqs/XXX/*
> 
> Pierre Gondois (4):
>    cpufreq: qcom-hw: Reset cancel_throttle when policy is re-enabled
>    cpufreq: qcom-hw: Disable LMH irq when disabling policy
>    cpufreq: qcom-hw: Remove deprecated irq_set_affinity_hint() call
>    cpufreq: Change order of online() CB and policy->cpus modification
> 
>   drivers/cpufreq/cpufreq.c         |  6 +++---
>   drivers/cpufreq/qcom-cpufreq-hw.c | 16 ++++++++++++----
>   2 files changed, 15 insertions(+), 7 deletions(-)
>