Re: [PATCH 01/14] arm64: dts: qcom: kodiak: Add EL2 overlay
From: Mukesh Ojha <hidden>
Date: 2026-03-09 08:01:08
Also in:
ath12k, dri-devel, linux-arm-msm, linux-devicetree, linux-media, linux-remoteproc, linux-wireless
On Fri, Mar 06, 2026 at 04:20:14PM +0530, Sumit Garg wrote:
From: Mukesh Ojha <redacted> All the existing variants Kodiak 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 Kodiak 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 <redacted> [SG: watchdog fixup] Signed-off-by: Sumit Garg <redacted>
Thanks for posting, I was about to add kodiak to the already existing list monaco, talos here https://lore.kernel.org/lkml/20260127-talos-el2-overlay-v2-0-b6a2266532c4@oss.qualcomm.com/ (local) but did you really miss linux-kernel@vger.kernel.org or is it intentional ? -Mukesh
quoted hunk ↗ jump to hunk
--- arch/arm64/boot/dts/qcom/Makefile | 2 ++ arch/arm64/boot/dts/qcom/kodiak-el2.dtso | 35 ++++++++++++++++++++++++ 2 files changed, 37 insertions(+) create mode 100644 arch/arm64/boot/dts/qcom/kodiak-el2.dtsodiff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile index f80b5d9cf1e8..09a7f943190e 100644 --- a/arch/arm64/boot/dts/qcom/Makefile +++ b/arch/arm64/boot/dts/qcom/Makefile@@ -139,6 +139,8 @@ dtb-$(CONFIG_ARCH_QCOM) += qcs404-evb-4000.dtb dtb-$(CONFIG_ARCH_QCOM) += qcs615-ride.dtb dtb-$(CONFIG_ARCH_QCOM) += qcs6490-radxa-dragon-q6a.dtb dtb-$(CONFIG_ARCH_QCOM) += qcs6490-rb3gen2.dtb +qcs6490-rb3gen2-el2-dtbs := qcs6490-rb3gen2.dtb kodiak-el2.dtbo +dtb-$(CONFIG_ARCH_QCOM) += qcs6490-rb3gen2-el2.dtb qcs6490-rb3gen2-vision-mezzanine-dtbs := qcs6490-rb3gen2.dtb qcs6490-rb3gen2-vision-mezzanine.dtbo qcs6490-rb3gen2-industrial-mezzanine-dtbs := qcs6490-rb3gen2.dtb qcs6490-rb3gen2-industrial-mezzanine.dtbodiff --git a/arch/arm64/boot/dts/qcom/kodiak-el2.dtso b/arch/arm64/boot/dts/qcom/kodiak-el2.dtso new file mode 100644 index 000000000000..0b3a69a0d765 --- /dev/null +++ b/arch/arm64/boot/dts/qcom/kodiak-el2.dtso@@ -0,0 +1,35 @@ +// SPDX-License-Identifier: BSD-3-Clause +/* + * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries. + * + * Kodiak specific modifications required to boot in EL2. + */ + + +/dts-v1/; +/plugin/; + +&gpu_zap_shader { + status = "disabled"; +}; + +&remoteproc_adsp { + iommus = <&apps_smmu 0x1800 0x0>; +}; + +&remoteproc_cdsp { + iommus = <&apps_smmu 0x11a0 0x0400>; +}; + +&remoteproc_wpss { + iommus = <&apps_smmu 0x1c03 0x1>, + <&apps_smmu 0x1c83 0x1>; +}; + +&venus { + status = "disabled"; +}; + +&watchdog { + status = "okay"; +};-- 2.51.0
-- -Mukesh Ojha