Re: [PATCH] arm64: dts: qcom: hamoa: Add remoteproc in EL2 device trees

[Xin Liu <xin.liu@oss.qualcomm.com>]

On 1/30/2026 5:24 PM, Konrad Dybcio wrote:
> On 1/30/26 8:31 AM, Xin Liu wrote:
>> All the existing variants Talos boards are using Gunyah hypervisor
>> which means that, so far, Linux-based OS could only boot in EL1 on
>> those devices.  However, it is possible for us to boot Linux at EL2
>> on these devices [1].
>>
>> When running under Gunyah, the remote processor firmware IOMMU streams
>> are controlled by Gunyah. However, without Gunyah, the IOMMU is managed
>> by the consumer of this DeviceTree. Therefore, describe the firmware
>> streams for each remote processor.
>>
>> Add remoteproc to the EL2 device trees to generate the corresponding
>> -el2.dtb files.
>>
>> [1]
>> https://docs.qualcomm.com/bundle/publicresource/topics/80-70020-4/boot-developer-touchpoints.html#uefi
>>
>> Signed-off-by: Xin Liu <xin.liu@oss.qualcomm.com>
>> ---
>>   arch/arm64/boot/dts/qcom/x1-el2.dtso | 8 ++++++++
>>   1 file changed, 8 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/qcom/x1-el2.dtso b/arch/arm64/boot/dts/qcom/x1-el2.dtso
>> index 175679be01eb..8279854fd73c 100644
>> --- a/arch/arm64/boot/dts/qcom/x1-el2.dtso
>> +++ b/arch/arm64/boot/dts/qcom/x1-el2.dtso
>> @@ -52,6 +52,14 @@ &pcie_smmu {
>>   	status = "okay";
>>   };
>>   
>> +&remoteproc_adsp {
>> +	iommus = <&apps_smmu 0x1000 0x0>;
> The mask should be 0x80 according to docs (although the resulting SID
> is the same)

Thank you for your reminder, will update later.


XIN

>> +};
>> +
>> +&remoteproc_cdsp {
>> +	iommus = <&apps_smmu 0x0c00 0x0>;
> This looks in line with docs
>
> Konrad