linux-kernel - Re: [PATCH] arm64: dts: qcom: ipq5018: add few more reserved memory regions

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Date:   Thu, 26 Oct 2023 20:52:56 +0200
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Kathiravan Thirumoorthy <quic_kathirav@...cinc.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>
Cc:     linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: dts: qcom: ipq5018: add few more reserved memory
 regions



On 10/25/23 18:42, Kathiravan Thirumoorthy wrote:
> Like all other IPQ SoCs, bootloader will collect the system RAM contents
> upon crash for the post morterm analysis. If we don't reserve the memory
> region used by bootloader, obviously linux will consume it and upon next
> boot on crash, bootloader will be loaded in the same region, which will
> lead to loose some of the data, sometimes we may miss out critical
> information. So lets reserve the region used by the bootloader.
> 
> Similarly SBL copies some data into the reserved region and it will be
> used in the crash scenario. So reserve 1MB for SBL as well.
> 
> While at it, enable the SMEM support along with TCSR mutex.
> 
> Signed-off-by: Kathiravan Thirumoorthy <quic_kathirav@...cinc.com>
> ---
Bit of a "many things at once" but okay

Reviewed-by: Konrad Dybcio <konrad.dybcio@...aro.org>

Konrad