From a3e3203d04e6d25bbd2ee678d82b833af53461a8 Mon Sep 17 00:00:00 2001 From: Mukesh Ojha Date: Tue, 27 Jan 2026 17:13:49 +0530 Subject: [PATCH] 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 Reviewed-by: Konrad Dybcio Link: https://lore.kernel.org/r/20260127-talos-el2-overlay-v2-2-b6a2266532c4@oss.qualcomm.com Signed-off-by: Bjorn Andersson --- arch/arm64/boot/dts/qcom/Makefile | 8 +++++++ arch/arm64/boot/dts/qcom/monaco-el2.dtso | 29 ++++++++++++++++++++++++ 2 files changed, 37 insertions(+) create mode 100644 arch/arm64/boot/dts/qcom/monaco-el2.dtso diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile index ef0e9ca065da..02921a495b2c 100644 --- a/arch/arm64/boot/dts/qcom/Makefile +++ b/arch/arm64/boot/dts/qcom/Makefile @@ -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 diff --git a/arch/arm64/boot/dts/qcom/monaco-el2.dtso b/arch/arm64/boot/dts/qcom/monaco-el2.dtso new file mode 100644 index 000000000000..a7e3270f8609 --- /dev/null +++ b/arch/arm64/boot/dts/qcom/monaco-el2.dtso @@ -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>; +};