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Message-ID: <CAMi1Hd2P47PWjnRaACE9oyxRpZZwFwTamwCCxufN6qW+8SKFrA@mail.gmail.com>
Date:   Wed, 12 Aug 2020 19:07:35 +0530
From:   Amit Pundir <amit.pundir@...aro.org>
To:     Konrad Dybcio <konradybcio@...il.com>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        dt <devicetree@...r.kernel.org>,
        John Stultz <john.stultz@...aro.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        lkml <linux-kernel@...r.kernel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Sumit Semwal <sumit.semwal@...aro.org>
Subject: Re:

On Fri, 7 Aug 2020 at 04:02, Konrad Dybcio <konradybcio@...il.com> wrote:
>
> Subject: Re: [PATCH v4] arm64: dts: qcom: Add support for Xiaomi Poco F1 (Beryllium)
>
> >// This removed_region is needed to boot the device
> >               // TODO: Find out the user of this reserved memory
> >               removed_region: memory@...00000 {
>
> This region seems to belong to the Trust Zone. When Linux tries to access it, TZ bites and shuts the device down.

That is totally possible. Plus it falls right in between TZ and QSEE
reserved-memory regions. However, I do not find any credible source
of information which can confirm this. So I'm hesitant to update the
TODO item in the above comment.

>
> Konrad