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

[Xin Liu]

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@xxxxxxxxxxxxxxxx>
> > ---
> >   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