arch/arm64/boot/dts/qcom/sc8280xp-el2.dtso

Source file repositories/reference/linux-study-clean/arch/arm64/boot/dts/qcom/sc8280xp-el2.dtso

File Facts

System
Linux kernel
Corpus path
arch/arm64/boot/dts/qcom/sc8280xp-el2.dtso
Extension
.dtso
Size
770 bytes
Lines
43
Domain
Architecture Layer
Bucket
arch/arm64
Inferred role
Architecture Layer: arch/arm64
Status
atlas-only

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: BSD-3-Clause

/*
 * sc8280xp 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 QHEE, 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.
 */
&pcie2a {
	iommu-map = <0 &pcie_smmu 0x20000 0x10000>;
};

&pcie2b {
	iommu-map = <0 &pcie_smmu 0x30000 0x10000>;
};

&pcie3a {
	iommu-map = <0 &pcie_smmu 0x40000 0x10000>;
};

&pcie3b {
	iommu-map = <0 &pcie_smmu 0x50000 0x10000>;
};

&pcie4 {
	iommu-map = <0 &pcie_smmu 0x60000 0x10000>;
};

&pcie_smmu {
	status = "okay";
};

Annotation

Implementation Notes