1*d5b0e70fSEmmanuel Vadot# SPDX-License-Identifier: (GPL-2.0-only or BSD-2-Clause) 2*d5b0e70fSEmmanuel Vadot%YAML 1.2 3*d5b0e70fSEmmanuel Vadot--- 4*d5b0e70fSEmmanuel Vadot$id: http://devicetree.org/schemas/iommu/xen,grant-dma.yaml# 5*d5b0e70fSEmmanuel Vadot$schema: http://devicetree.org/meta-schemas/core.yaml# 6*d5b0e70fSEmmanuel Vadot 7*d5b0e70fSEmmanuel Vadottitle: Xen specific IOMMU for virtualized devices (e.g. virtio) 8*d5b0e70fSEmmanuel Vadot 9*d5b0e70fSEmmanuel Vadotmaintainers: 10*d5b0e70fSEmmanuel Vadot - Stefano Stabellini <sstabellini@kernel.org> 11*d5b0e70fSEmmanuel Vadot 12*d5b0e70fSEmmanuel Vadotdescription: 13*d5b0e70fSEmmanuel Vadot The Xen IOMMU represents the Xen grant table interface. Grant mappings 14*d5b0e70fSEmmanuel Vadot are to be used with devices connected to the Xen IOMMU using the "iommus" 15*d5b0e70fSEmmanuel Vadot property, which also specifies the ID of the backend domain. 16*d5b0e70fSEmmanuel Vadot The binding is required to restrict memory access using Xen grant mappings. 17*d5b0e70fSEmmanuel Vadot 18*d5b0e70fSEmmanuel Vadotproperties: 19*d5b0e70fSEmmanuel Vadot compatible: 20*d5b0e70fSEmmanuel Vadot const: xen,grant-dma 21*d5b0e70fSEmmanuel Vadot 22*d5b0e70fSEmmanuel Vadot '#iommu-cells': 23*d5b0e70fSEmmanuel Vadot const: 1 24*d5b0e70fSEmmanuel Vadot description: 25*d5b0e70fSEmmanuel Vadot The single cell is the domid (domain ID) of the domain where the backend 26*d5b0e70fSEmmanuel Vadot is running. 27*d5b0e70fSEmmanuel Vadot 28*d5b0e70fSEmmanuel Vadotrequired: 29*d5b0e70fSEmmanuel Vadot - compatible 30*d5b0e70fSEmmanuel Vadot - "#iommu-cells" 31*d5b0e70fSEmmanuel Vadot 32*d5b0e70fSEmmanuel VadotadditionalProperties: false 33*d5b0e70fSEmmanuel Vadot 34*d5b0e70fSEmmanuel Vadotexamples: 35*d5b0e70fSEmmanuel Vadot - | 36*d5b0e70fSEmmanuel Vadot iommu { 37*d5b0e70fSEmmanuel Vadot compatible = "xen,grant-dma"; 38*d5b0e70fSEmmanuel Vadot #iommu-cells = <1>; 39*d5b0e70fSEmmanuel Vadot }; 40