linux-kernel - Re: [PATCH v3 1/2] arm64: dts: qcom: qdu1000-idp: Update reserved memory region

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Date:   Mon, 17 Jul 2023 18:32:41 +0530
From:   Komal Bajaj <quic_kbajaj@...cinc.com>
To:     Konrad Dybcio <konrad.dybcio@...aro.org>, <agross@...nel.org>,
        <andersson@...nel.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>
CC:     <linux-arm-msm@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 1/2] arm64: dts: qcom: qdu1000-idp: Update reserved
 memory region



On 7/15/2023 7:43 PM, Konrad Dybcio wrote:
> On 6.07.2023 14:51, Komal Bajaj wrote:
>> Add missing reserved regions as described in QDU1000 memory map.
>>
>> Signed-off-by: Komal Bajaj <quic_kbajaj@...cinc.com>
>> ---
> Are you sure you want to reserve 4352 MiB?

Yes, we want to reserve 4352 MiB of memory here, since this SoC enables 
Open RAN solution, it requires such huge
memory for its modem usecase.

Thanks
Komal

>
> Konrad
>>   arch/arm64/boot/dts/qcom/qdu1000-idp.dts | 22 ++++++++++++++++++++++
>>   1 file changed, 22 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/qcom/qdu1000-idp.dts b/arch/arm64/boot/dts/qcom/qdu1000-idp.dts
>> index 1d22f87fd238..8446eb438a34 100644
>> --- a/arch/arm64/boot/dts/qcom/qdu1000-idp.dts
>> +++ b/arch/arm64/boot/dts/qcom/qdu1000-idp.dts
>> @@ -448,6 +448,28 @@ &qupv3_id_0 {
>>   	status = "okay";
>>   };
>>
>> +&reserved_memory {
>> +	ecc_meta_data_mem: ecc-meta-data@...00000 {
>> +		reg = <0x0 0xe0000000 0x0 0x20000000>;
>> +		no-map;
>> +	};
>> +
>> +	harq_buffer_mem: harq-buffer@...000000 {
>> +		reg = <0x8 0x0 0x0 0x80000000>;
>> +		no-map;
>> +	};
>> +
>> +	tenx_sp_buffer_mem: tenx-sp-buffer@...000000 {
>> +		reg = <0x8 0x80000000 0x0 0x50000000>;
>> +		no-map;
>> +	};
>> +
>> +	fapi_buffer_mem: fapi-buffer@...000000 {
>> +		reg = <0x8 0xd0000000 0x0 0x20000000>;
>> +		no-map;
>> +	};
>> +};
>> +
>>   &sdhc {
>>   	pinctrl-0 = <&sdc_on_state>;
>>   	pinctrl-1 = <&sdc_off_state>;
>> --
>> 2.40.1
>>