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

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Message-ID: <20260130073113.3091884-1-xin.liu@oss.qualcomm.com>
Date: Thu, 29 Jan 2026 23:31:13 -0800
From: Xin Liu <xin.liu@....qualcomm.com>
To: 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
Subject: [PATCH] arm64: dts: qcom: hamoa: Add remoteproc in EL2 device trees

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(+)

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>;
+};
+
+&remoteproc_cdsp {
+	iommus = <&apps_smmu 0x0c00 0x0>;
+};
+
 /*
  * The "SBSA watchdog" is implemented in software in Gunyah
  * and can't be used when running in EL2.
-- 
2.43.0