On Fri, Mar 13, 2026 at 11:34:51AM +0530, Mukesh Ojha wrote:
On Thu, Mar 12, 2026 at 11:57:42AM +0530, Sumit Garg wrote:
From: Mukesh Ojha mukesh.ojha@oss.qualcomm.com
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-devel...
Signed-off-by: Mukesh Ojha mukesh.ojha@oss.qualcomm.com [SG: watchdog fixup] Signed-off-by: Sumit Garg sumit.garg@oss.qualcomm.com
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.dtso
diff --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
We may need to add for couple of more variants..
Sure, those can be follow up patches if Bjorn is happy to pick this one independently.
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.dtbo diff --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";
+};
rb3gen2 has modem as well, did we test that as well ?
OP-TEE don't have access to modem, it's locked down in XBL-SEC.
-Sumit