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

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Message-ID: <11D9329300A4B492+9485ef48-5ac3-4030-afd3-e5c7dabfa1d8@radxa.com>
Date: Fri, 30 Jan 2026 17:37:51 +0800
From: Xilin Wu <sophon@...xa.com>
To: Xin Liu <xin.liu@....qualcomm.com>, andersson@...nel.org,
 konradybcio@...nel.org, robh@...nel.org, krzk+dt@...nel.org,
 conor+dt@...nel.org
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, tingwei.zhang@....qualcomm.com,
 jie.gan@....qualcomm.com, Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Subject: Re: [PATCH] arm64: dts: qcom: hamoa: Add remoteproc in EL2 device
 trees

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@....qualcomm.com>
> ---
>   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a newer version of the TrustZone firmware.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

-- 
Best regards,
Xilin Wu <sophon@...xa.com>