linux-kernel - Re: [PATCH 10/10] arm64: dts: qcom: sdm845: add LLCC BWMON

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Date:   Sat, 23 Jul 2022 10:36:11 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Steev Klimaszewski <steev@...i.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Georgi Djakov <djakov@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        linux-arm-msm@...r.kernel.org, linux-pm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Rajendra Nayak <quic_rjendra@...cinc.com>
Subject: Re: [PATCH 10/10] arm64: dts: qcom: sdm845: add LLCC BWMON

On 23/07/2022 04:37, Steev Klimaszewski wrote:
>>
>> Currently it's 5.19.0-rc7 (torvalds tree at 4ba1329c) with a few extra 
>> patches on top, the bwmon set included.  It's possible that secure 
>> world uses it, but I do not know enough about that to say one way or 
>> the other.

To test patches you should apply them on maintainer's tree or
linux-next. Applying on other trees of course might be useful for
testing some backports, but it is independent process and different issue.

>>
>> -- steev
>>
> I think you may be right; I just applied this patchset to -next 
> (20220722) and i do not see the error message there.  On my 5.19-rc7 
> tree, i am also testing a patchset that enables qcom devices to access 
> efivars, so possibly we are ending up in secure world there?

Actually mapping of IO space should not touch secure world, so this was
a long shot assuming you test it on the next.


Best regards,
Krzysztof