linux-kernel - Re: [PATCH 1/4] arm64: dts: qcom: Introduce a carveout for modem metadata

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Date:   Wed, 14 Dec 2022 17:14:18 +0530
From:   Sibi Sankar <quic_sibis@...cinc.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        <andersson@...nel.org>, <krzysztof.kozlowski+dt@...aro.org>,
        <robh+dt@...nel.org>, <manivannan.sadhasivam@...aro.org>
CC:     <agross@...nel.org>, <linux-arm-msm@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <konrad.dybcio@...ainline.org>, <amit.pundir@...aro.org>,
        <regressions@...mhuis.info>, <sumit.semwal@...aro.org>,
        <will@...nel.org>, <catalin.marinas@....com>,
        <robin.murphy@....com>
Subject: Re: [PATCH 1/4] arm64: dts: qcom: Introduce a carveout for modem
 metadata



On 12/14/22 16:57, Krzysztof Kozlowski wrote:
> On 13/12/2022 15:07, Sibi Sankar wrote:
>> Introduce a new carveout for modem metadata. This will serve as a
>> replacement for the memory region used by MSA to authenticate modem
>> ELF headers.
>>
>> Signed-off-by: Sibi Sankar <quic_sibis@...cinc.com>
>> ---
>>   arch/arm64/boot/dts/qcom/msm8996-xiaomi-common.dtsi    | 6 ++++++
>>   arch/arm64/boot/dts/qcom/msm8996.dtsi                  | 9 +++++++++
>>   arch/arm64/boot/dts/qcom/msm8998.dtsi                  | 9 +++++++++
>>   arch/arm64/boot/dts/qcom/sc7180-idp.dts                | 7 ++++++-
>>   arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi           | 7 ++++++-
>>   arch/arm64/boot/dts/qcom/sc7280-herobrine-lte-sku.dtsi | 7 ++++++-
>>   arch/arm64/boot/dts/qcom/sdm845.dtsi                   | 9 +++++++++
>>   7 files changed, 51 insertions(+), 3 deletions(-)
>>
>> diff --git a/arch/arm64/boot/dts/qcom/msm8996-xiaomi-common.dtsi b/arch/arm64/boot/dts/qcom/msm8996-xiaomi-common.dtsi
>> index 5b47b8de69da..4242f8587c19 100644
>> --- a/arch/arm64/boot/dts/qcom/msm8996-xiaomi-common.dtsi
>> +++ b/arch/arm64/boot/dts/qcom/msm8996-xiaomi-common.dtsi
>> @@ -127,6 +127,12 @@
>>   			reg = <0x0 0xf6f00000 0x0 0x100000>;
>>   			no-map;
>>   		};
>> +
>> +		/delete-node/ memory@...00000;
>> +		mdata_mem: memory@...00000 {
>> +			reg = <0x0 0xf7100000 0x0 0x4000>;
>> +			no-map;
>> +		};
>>   	};
>>   
>>   	vph_pwr: vph-pwr-regulator {
>> diff --git a/arch/arm64/boot/dts/qcom/msm8996.dtsi b/arch/arm64/boot/dts/qcom/msm8996.dtsi
>> index cc65f52bb80f..3f5fb08e2341 100644
>> --- a/arch/arm64/boot/dts/qcom/msm8996.dtsi
>> +++ b/arch/arm64/boot/dts/qcom/msm8996.dtsi
>> @@ -462,6 +462,11 @@
>>   			reg = <0x0 0x91500000 0x0 0x200000>;
>>   			no-map;
>>   		};
>> +
>> +		mdata_mem: memory@...00000 {
>> +			reg = <0x0 0x91700000 0x0 0x4000>;
>> +			no-map;
>> +		};
>>   	};
>>   
>>   	rpm-glink {
>> @@ -2458,6 +2463,10 @@
>>   				memory-region = <&mpss_mem>;
>>   			};
>>   
>> +			metadata {
> 
> Does it pass dtbs_check?

^^ portion of the bindings aren't in yaml yet please see patch 3.

> 
> Best regards,
> Krzysztof
>