From 8a401135001c65203f3fd210d482bc7eae1bfc56 Mon Sep 17 00:00:00 2001 From: Nikita Travkin Date: Sat, 3 May 2025 15:39:29 +0500 Subject: [PATCH] arm64: dts: qcom: sc8280xp: Add PCIe IOMMU sc8280xp has an SMMUv3 connected to PCIe which is normally controlled by QHEE and is thus transparent to the OS. However if we boot Linux in EL2, without QHEE, we need to manage this IOMMU ourselves. To make that easier, and since the hardware actually exists, just not "usually" managed by Linux, describe it in the dts as "reserved". Signed-off-by: Nikita Travkin Link: https://lore.kernel.org/r/20250503-sc-el2-overlays-v2-2-24e9b4572e15@trvn.ru Signed-off-by: Bjorn Andersson --- arch/arm64/boot/dts/qcom/sc8280xp.dtsi | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi index 35ef31d4ecf2..27d21e1a2d50 100644 --- a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi +++ b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi @@ -4927,6 +4927,20 @@ }; }; + pcie_smmu: iommu@14f80000 { + compatible = "arm,smmu-v3"; + reg = <0 0x14f80000 0 0x80000>; + #iommu-cells = <1>; + interrupts = , + , + ; + interrupt-names = "eventq", + "gerror", + "cmdq-sync"; + dma-coherent; + status = "reserved"; /* Controlled by QHEE. */ + }; + apps_smmu: iommu@15000000 { compatible = "qcom,sc8280xp-smmu-500", "arm,mmu-500"; reg = <0 0x15000000 0 0x100000>; -- 2.50.1