1 files changed, 52 insertions, 0 deletions
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";
+};