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arm64: dts: qcom: monaco: Add EL2 overlay 

All the Monaco IOT variants 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 a EL2-specific DT overlay and apply it to Monaco IOT variant
devices to create -el2.dtb for each of them alongside "normal" dtb.

[1]
https://docs.qualcomm.com/bundle/publicresource/topics/80-70020-4/boot-developer-touchpoints.html#uefi

Signed-off-by: Mukesh Ojha <mukesh.ojha@oss.qualcomm.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260127-talos-el2-overlay-v2-2-b6a2266532c4@oss.qualcomm.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
master
Mukesh Ojha 2026-01-27 17:13:49 +05:30 committed by Bjorn Andersson
parent b3e0db9d8e
commit a3e3203d04
2 changed files with 37 additions and 0 deletions
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8
arch/arm64/boot/dts/qcom/Makefile
View File

@ -51,6 +51,10 @@ lemans-evk-el2-dtbs := lemans-evk.dtb lemans-el2.dtbo
dtb-$(CONFIG_ARCH_QCOM) += lemans-evk-el2.dtb
dtb-$(CONFIG_ARCH_QCOM) += milos-fairphone-fp6.dtb
dtb-$(CONFIG_ARCH_QCOM) += monaco-evk.dtb
monaco-evk-el2-dtbs := monaco-evk.dtb monaco-el2.dtbo
dtb-$(CONFIG_ARCH_QCOM) += monaco-evk-el2.dtb
dtb-$(CONFIG_ARCH_QCOM) += msm8216-samsung-fortuna3g.dtb
dtb-$(CONFIG_ARCH_QCOM) += msm8916-acer-a1-724.dtb
dtb-$(CONFIG_ARCH_QCOM) += msm8916-alcatel-idol347.dtb
@ -154,6 +158,10 @@ dtb-$(CONFIG_ARCH_QCOM) += qcs6490-rb3gen2-industrial-mezzanine.dtb
dtb-$(CONFIG_ARCH_QCOM) += qcs6490-rb3gen2-vision-mezzanine.dtb
dtb-$(CONFIG_ARCH_QCOM) += qcs6490-thundercomm-rubikpi3.dtb
dtb-$(CONFIG_ARCH_QCOM) += qcs8300-ride.dtb
qcs8300-ride-el2-dtbs := qcs8300-ride.dtb monaco-el2.dtbo
dtb-$(CONFIG_ARCH_QCOM) += qcs8300-ride-el2.dtb
dtb-$(CONFIG_ARCH_QCOM) += qcs8550-aim300-aiot.dtb
dtb-$(CONFIG_ARCH_QCOM) += qcs9100-ride.dtb
dtb-$(CONFIG_ARCH_QCOM) += qcs9100-ride-r3.dtb

29
arch/arm64/boot/dts/qcom/monaco-el2.dtso Normal file
View File

@ -0,0 +1,29 @@
// SPDX-License-Identifier: BSD-3-Clause
/*
* Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
*
* Monaco specific modifications required to boot in EL2.
*/
/dts-v1/;
/plugin/;
&gpu_zap_shader {
status = "disabled";
};
&iris {
status = "disabled";
};
&remoteproc_adsp {
iommus = <&apps_smmu 0x2000 0x0>;
};
&remoteproc_cdsp {
iommus = <&apps_smmu 0x19c0 0x0400>;
};
&remoteproc_gpdsp {
iommus = <&apps_smmu 0x28a0 0x0>;
};