On Fri, Mar 06, 2026 at 04:20:14PM +0530, Sumit Garg wrote: > From: Mukesh Ojha <[email protected]> > > 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 <[email protected]> > [SG: watchdog fixup] > Signed-off-by: Sumit Garg <[email protected]>
Thanks for posting, I was about to add kodiak to the already existing list monaco, talos here https://lore.kernel.org/lkml/[email protected]/ but did you really miss [email protected] or is it intentional ? -Mukesh > --- > 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 > > 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"; > +}; > -- > 2.51.0 > -- -Mukesh Ojha
