From e01acd8f3cc1364b9147d3eb8913fdb935851ecd Mon Sep 17 00:00:00 2001 From: Nikita Travkin Date: Sat, 3 May 2025 15:39:32 +0500 Subject: [PATCH] arm64: dts: qcom: x1e/x1p: Add EL2 overlay for WoA devices WoA devices using x1e/x1p use android firmware to boot, which notably includes Gunyah hypervisor. This means that, so far, Linux-based OS could only boot in EL1 on those devices. However Windows can replace Gunyah upon boot with it's own hypervisor, and with the use of tools such as "slbounce", it's possible to do the same for Linux-based OS, in which case some modifications to the DT are necessary to facilitate the absence of Gunyah services. Add a EL2-specific DT overlay and apply it to x1e/x1p WoA devices to create -el2.dtb for each of them alongside "normal" dtb. Signed-off-by: Nikita Travkin Link: https://lore.kernel.org/r/20250503-sc-el2-overlays-v2-5-24e9b4572e15@trvn.ru Signed-off-by: Bjorn Andersson --- arch/arm64/boot/dts/qcom/Makefile | 36 ++++++++++++------ arch/arm64/boot/dts/qcom/x1-el2.dtso | 52 ++++++++++++++++++++++++++ arch/arm64/boot/dts/qcom/x1e80100.dtsi | 2 +- 3 files changed, 77 insertions(+), 13 deletions(-) create mode 100644 arch/arm64/boot/dts/qcom/x1-el2.dtso diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile index 12d9ed1129b4..4300b29397c6 100644 --- a/arch/arm64/boot/dts/qcom/Makefile +++ b/arch/arm64/boot/dts/qcom/Makefile @@ -299,15 +299,27 @@ dtb-$(CONFIG_ARCH_QCOM) += sm8650-mtp.dtb dtb-$(CONFIG_ARCH_QCOM) += sm8650-qrd.dtb dtb-$(CONFIG_ARCH_QCOM) += sm8750-mtp.dtb dtb-$(CONFIG_ARCH_QCOM) += sm8750-qrd.dtb -dtb-$(CONFIG_ARCH_QCOM) += x1e001de-devkit.dtb -dtb-$(CONFIG_ARCH_QCOM) += x1e78100-lenovo-thinkpad-t14s.dtb -dtb-$(CONFIG_ARCH_QCOM) += x1e78100-lenovo-thinkpad-t14s-oled.dtb -dtb-$(CONFIG_ARCH_QCOM) += x1e80100-asus-vivobook-s15.dtb -dtb-$(CONFIG_ARCH_QCOM) += x1e80100-crd.dtb -dtb-$(CONFIG_ARCH_QCOM) += x1e80100-dell-xps13-9345.dtb -dtb-$(CONFIG_ARCH_QCOM) += x1e80100-hp-omnibook-x14.dtb -dtb-$(CONFIG_ARCH_QCOM) += x1e80100-lenovo-yoga-slim7x.dtb -dtb-$(CONFIG_ARCH_QCOM) += x1e80100-microsoft-romulus13.dtb -dtb-$(CONFIG_ARCH_QCOM) += x1e80100-microsoft-romulus15.dtb -dtb-$(CONFIG_ARCH_QCOM) += x1e80100-qcp.dtb -dtb-$(CONFIG_ARCH_QCOM) += x1p42100-crd.dtb +x1e001de-devkit-el2-dtbs := x1e001de-devkit.dtb x1-el2.dtbo +dtb-$(CONFIG_ARCH_QCOM) += x1e001de-devkit.dtb x1e001de-devkit-el2.dtb +x1e78100-lenovo-thinkpad-t14s-el2-dtbs := x1e78100-lenovo-thinkpad-t14s.dtb x1-el2.dtbo +dtb-$(CONFIG_ARCH_QCOM) += x1e78100-lenovo-thinkpad-t14s.dtb x1e78100-lenovo-thinkpad-t14s-el2.dtb +x1e78100-lenovo-thinkpad-t14s-oled-el2-dtbs := x1e78100-lenovo-thinkpad-t14s-oled.dtb x1-el2.dtbo +dtb-$(CONFIG_ARCH_QCOM) += x1e78100-lenovo-thinkpad-t14s-oled.dtb x1e78100-lenovo-thinkpad-t14s-oled-el2.dtb +x1e80100-asus-vivobook-s15-el2-dtbs := x1e80100-asus-vivobook-s15.dtb x1-el2.dtbo +dtb-$(CONFIG_ARCH_QCOM) += x1e80100-asus-vivobook-s15.dtb x1e80100-asus-vivobook-s15-el2.dtb +x1e80100-crd-el2-dtbs := x1e80100-crd.dtb x1-el2.dtbo +dtb-$(CONFIG_ARCH_QCOM) += x1e80100-crd.dtb x1e80100-crd-el2.dtb +x1e80100-dell-xps13-9345-el2-dtbs := x1e80100-dell-xps13-9345.dtb x1-el2.dtbo +dtb-$(CONFIG_ARCH_QCOM) += x1e80100-dell-xps13-9345.dtb x1e80100-dell-xps13-9345-el2.dtb +x1e80100-hp-omnibook-x14-el2-dtbs := x1e80100-hp-omnibook-x14.dtb x1-el2.dtbo +dtb-$(CONFIG_ARCH_QCOM) += x1e80100-hp-omnibook-x14.dtb x1e80100-hp-omnibook-x14-el2.dtb +x1e80100-lenovo-yoga-slim7x-el2-dtbs := x1e80100-lenovo-yoga-slim7x.dtb x1-el2.dtbo +dtb-$(CONFIG_ARCH_QCOM) += x1e80100-lenovo-yoga-slim7x.dtb x1e80100-lenovo-yoga-slim7x-el2.dtb +x1e80100-microsoft-romulus13-el2-dtbs := x1e80100-microsoft-romulus13.dtb x1-el2.dtbo +dtb-$(CONFIG_ARCH_QCOM) += x1e80100-microsoft-romulus13.dtb x1e80100-microsoft-romulus13-el2.dtb +x1e80100-microsoft-romulus15-el2-dtbs := x1e80100-microsoft-romulus15.dtb x1-el2.dtbo +dtb-$(CONFIG_ARCH_QCOM) += x1e80100-microsoft-romulus15.dtb x1e80100-microsoft-romulus15-el2.dtb +x1e80100-qcp-el2-dtbs := x1e80100-qcp.dtb x1-el2.dtbo +dtb-$(CONFIG_ARCH_QCOM) += x1e80100-qcp.dtb x1e80100-qcp-el2.dtb +x1p42100-crd-el2-dtbs := x1p42100-crd.dtb x1-el2.dtbo +dtb-$(CONFIG_ARCH_QCOM) += x1p42100-crd.dtb x1p42100-crd-el2.dtb diff --git a/arch/arm64/boot/dts/qcom/x1-el2.dtso b/arch/arm64/boot/dts/qcom/x1-el2.dtso new file mode 100644 index 000000000000..380441deca65 --- /dev/null +++ b/arch/arm64/boot/dts/qcom/x1-el2.dtso @@ -0,0 +1,52 @@ +// SPDX-License-Identifier: BSD-3-Clause + +/* + * x1 specific modifications required to boot in EL2. + */ + +/dts-v1/; +/plugin/; + +/* We can't and don't need to use zap shader in EL2 as linux can zap the gpu on it's own. */ +&gpu_zap_shader { + status = "disabled"; +}; + +/* + * When running under Gunyah, this IOMMU is controlled by the firmware, + * however when we take ownership of it in EL2, we need to configure + * it properly to use PCIe. + * + * Additionally, it seems like ITS emulation in Gunyah is broken so we + * can't use MSI on some PCIe controllers in EL1. But we can add them + * here for EL2. + */ +&pcie3 { + iommu-map = <0 &pcie_smmu 0x30000 0x10000>; + msi-map = <0 &gic_its 0xb0000 0x10000>; +}; + +&pcie4 { + iommu-map = <0 &pcie_smmu 0x40000 0x10000>; +}; + +&pcie5 { + iommu-map = <0 &pcie_smmu 0x50000 0x10000>; + msi-map = <0 &gic_its 0xd0000 0x10000>; +}; + +&pcie6a { + iommu-map = <0 &pcie_smmu 0x60000 0x10000>; +}; + +&pcie_smmu { + status = "okay"; +}; + +/* + * The "SBSA watchdog" is implemented in software in Gunyah + * and can't be used when running in EL2. + */ +&sbsa_watchdog { + status = "disabled"; +}; diff --git a/arch/arm64/boot/dts/qcom/x1e80100.dtsi b/arch/arm64/boot/dts/qcom/x1e80100.dtsi index 7a3e75294be5..c04a2615ca77 100644 --- a/arch/arm64/boot/dts/qcom/x1e80100.dtsi +++ b/arch/arm64/boot/dts/qcom/x1e80100.dtsi @@ -8163,7 +8163,7 @@ }; }; - watchdog@1c840000 { + sbsa_watchdog: watchdog@1c840000 { compatible = "arm,sbsa-gwdt"; reg = <0 0x1c840000 0 0x1000>, <0 0x1c850000 0 0x1000>; -- 2.50.1