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

[Xin Liu]

On 1/30/2026 5:37 PM, Xilin Wu wrote:
> On 1/30/2026 3:31 PM, 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(+)
>
> Hi Xin,
>
> Will this work on Snapdragon X laptops running the older Windows 
> firmware? I believe that Peripheral Image Loader support in EL2 
> requires a newer version of the TrustZone firmware.
>
> I noticed that the TrustZone firmware used in hamoa_iot-ubuntu [1] has 
> a different version string compared to the WP firmware found in laptops:
>
> iot-ubuntu: TZ.XF.5.0
> WP: TZ.XF.5.28.1
>
>
> [1] 
> https://softwarecenter.qualcomm.com/nexus/generic/software/chip/ubuntu_qualcomm_iot-spf-1-0/ubuntu-qualcomm-iot-spf-1-0_test_device_public/r1.0.r1_00004.0/hamoa_iot-ubun-1-0-r1/common/build/bin 
Hi，Xilin

Now firmware can not work, still need TZ team to modify some things. It 
is the only modification from kernel side, so I update it.

Uploading this modification will also facilitate debugging by TZ team.


Thanks,

Xin