All the Lemans 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, remote processor firmware IOMMU streams is controlled by the Gunyah however when Linux take ownership of it in EL2, It need to configure it properly to use remote processor. Add a EL2-specific DT overlay and apply it to Lemans 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]> --- arch/arm64/boot/dts/qcom/Makefile | 10 ++++++++ arch/arm64/boot/dts/qcom/lemans-el2.dtso | 41 ++++++++++++++++++++++++++++++++ 2 files changed, 51 insertions(+) diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile index 6f34d5ed331c..56efd90b7a5e 100644 --- a/arch/arm64/boot/dts/qcom/Makefile +++ b/arch/arm64/boot/dts/qcom/Makefile @@ -37,6 +37,10 @@ lemans-evk-camera-dtbs := lemans-evk.dtb lemans-evk-camera.dtbo dtb-$(CONFIG_ARCH_QCOM) += lemans-evk-camera-csi1-imx577.dtb dtb-$(CONFIG_ARCH_QCOM) += lemans-evk-camera.dtb + +lemans-evk-el2-dtbs := lemans-evk.dtb lemans-el2.dtbo + +dtb-$(CONFIG_ARCH_QCOM) += lemans-evk-el2.dtb dtb-$(CONFIG_ARCH_QCOM) += monaco-evk.dtb dtb-$(CONFIG_ARCH_QCOM) += msm8216-samsung-fortuna3g.dtb dtb-$(CONFIG_ARCH_QCOM) += msm8916-acer-a1-724.dtb @@ -142,6 +146,12 @@ dtb-$(CONFIG_ARCH_QCOM) += qcs8300-ride.dtb dtb-$(CONFIG_ARCH_QCOM) += qcs8550-aim300-aiot.dtb dtb-$(CONFIG_ARCH_QCOM) += qcs9100-ride.dtb dtb-$(CONFIG_ARCH_QCOM) += qcs9100-ride-r3.dtb + +qcs9100-ride-el2-dtbs := qcs9100-ride.dtb lemans-el2.dtbo +qcs9100-ride-r3-el2-dtbs := qcs9100-ride-r3.dtb lemans-el2.dtbo + +dtb-$(CONFIG_ARCH_QCOM) += qcs9100-ride-el2.dtb +dtb-$(CONFIG_ARCH_QCOM) += qcs9100-ride-r3-el2.dtb dtb-$(CONFIG_ARCH_QCOM) += qdu1000-idp.dtb dtb-$(CONFIG_ARCH_QCOM) += qrb2210-rb1.dtb dtb-$(CONFIG_ARCH_QCOM) += qrb4210-rb2.dtb diff --git a/arch/arm64/boot/dts/qcom/lemans-el2.dtso b/arch/arm64/boot/dts/qcom/lemans-el2.dtso new file mode 100644 index 000000000000..af35039946e3 --- /dev/null +++ b/arch/arm64/boot/dts/qcom/lemans-el2.dtso @@ -0,0 +1,41 @@ +// SPDX-License-Identifier: BSD-3-Clause +/* + * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries. + */ + +/* + * Lemans specific modifications required to boot in EL2. + */ + +/dts-v1/; +/plugin/; + +&iris { + /* More driver work is needed */ + status = "disabled"; +}; + +/* + * When running under Gunyah, remote processor firmware IOMMU streams is + * controlled by the Gunyah however when we take ownership of it in EL2, + * we need to configure it properly to use remote processor. + */ +&remoteproc_adsp { + iommus = <&apps_smmu 0x3000 0x0>; +}; + +&remoteproc_cdsp0 { + iommus = <&apps_smmu 0x21c0 0x0400>; +}; + +&remoteproc_cdsp1 { + iommus = <&apps_smmu 0x29c0 0x0400>; +}; + +&remoteproc_gpdsp0 { + iommus = <&apps_smmu 0x38a0 0x0>; +}; + +&remoteproc_gpdsp1 { + iommus = <&apps_smmu 0x38c0 0x0>; +}; -- 2.50.1
