linux-hardening - Re: [PATCH v3 11/18] arm64: dts: qcom: sm8450: Add Qualcomm ramoops minidump node

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Date:   Thu, 4 May 2023 09:14:00 +0200
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Mukesh Ojha <quic_mojha@...cinc.com>, agross@...nel.org,
        andersson@...nel.org, corbet@....net, keescook@...omium.org,
        tony.luck@...el.com, gpiccoli@...lia.com, catalin.marinas@....com,
        will@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        robh+dt@...nel.org, linus.walleij@...aro.org,
        linux-gpio@...r.kernel.org, srinivas.kandagatla@...aro.org
Cc:     linux-arm-msm@...r.kernel.org, linux-remoteproc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-doc@...r.kernel.org
Subject: Re: [PATCH v3 11/18] arm64: dts: qcom: sm8450: Add Qualcomm ramoops
 minidump node



On 3.05.2023 19:02, Mukesh Ojha wrote:
> This enable dynamic reserve memory for Qualcomm ramoops device,
> Which will used to save ramoops frontend data and this region
> gets dumped on crash via Qualcomm's minidump infrastructure.
> qcom_pstore_minidump is the associated driver for this node.
> 
> Signed-off-by: Mukesh Ojha <quic_mojha@...cinc.com>
> ---
>  arch/arm64/boot/dts/qcom/sm8450.dtsi | 11 +++++++++++
>  1 file changed, 11 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sm8450.dtsi b/arch/arm64/boot/dts/qcom/sm8450.dtsi
> index 595533a..92d023f 100644
> --- a/arch/arm64/boot/dts/qcom/sm8450.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sm8450.dtsi
> @@ -614,6 +614,17 @@
>  			reg = <0x0 0xed900000 0x0 0x3b00000>;
>  			no-map;
>  		};
> +
> +		qcom_ramoops_md_region:qcom_ramoops_md {
Missing space after ':'

node names should not contain underscores

minidump {

or

ramoops {

would probably be better names for this node
> +			alloc-ranges = <0x0 0x00000000 0xffffffff 0xffffffff>;
> +			size = <0x0 0x200000>;
> +			no-map;
> +		};
> +	};
> +
> +	qcom_ramoops_md {
Node names should be generic (e.g. ramdump or something) and should
not contain underscores.

Konrad
> +		compatible = "qcom,sm8450-ramoops-minidump", "qcom,ramoops-minidump";
> +		memory-region = <&qcom_ramoops_md_region>;
>  	};
>  
>  	smp2p-adsp {