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authorLinus Torvalds <torvalds@linux-foundation.org>2022-06-10 09:57:11 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2022-06-10 09:57:11 -0700
commitf2ecc964b9414a407828f9bef242b77483e95a6d (patch)
tree0a412c7cbbc46b10a54e28cef49da7b9cfddf92f /Documentation
parent7d78b7ebdf7dac762c3807274182b7c582be7937 (diff)
parentdbac14a5a05ff8e1ce7c0da0e1f520ce39ec62ea (diff)
Merge tag 'for-linus-5.19a-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull xen updates from Juergen Gross: - a small cleanup removing "export" of an __init function - a small series adding a new infrastructure for platform flags - a series adding generic virtio support for Xen guests (frontend side) * tag 'for-linus-5.19a-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: xen: unexport __init-annotated xen_xlate_map_ballooned_pages() arm/xen: Assign xen-grant DMA ops for xen-grant DMA devices xen/grant-dma-ops: Retrieve the ID of backend's domain for DT devices xen/grant-dma-iommu: Introduce stub IOMMU driver dt-bindings: Add xen,grant-dma IOMMU description for xen-grant DMA ops xen/virtio: Enable restricted memory access using Xen grant mappings xen/grant-dma-ops: Add option to restrict memory access under Xen xen/grants: support allocating consecutive grants arm/xen: Introduce xen_setup_dma_ops() virtio: replace arch_has_restricted_virtio_memory_access() kernel: add platform_has() infrastructure
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/devicetree/bindings/iommu/xen,grant-dma.yaml39
1 files changed, 39 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/iommu/xen,grant-dma.yaml b/Documentation/devicetree/bindings/iommu/xen,grant-dma.yaml
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+++ b/Documentation/devicetree/bindings/iommu/xen,grant-dma.yaml
@@ -0,0 +1,39 @@
+# SPDX-License-Identifier: (GPL-2.0-only or BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iommu/xen,grant-dma.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Xen specific IOMMU for virtualized devices (e.g. virtio)
+
+maintainers:
+ - Stefano Stabellini <sstabellini@kernel.org>
+
+description:
+ The Xen IOMMU represents the Xen grant table interface. Grant mappings
+ are to be used with devices connected to the Xen IOMMU using the "iommus"
+ property, which also specifies the ID of the backend domain.
+ The binding is required to restrict memory access using Xen grant mappings.
+
+properties:
+ compatible:
+ const: xen,grant-dma
+
+ '#iommu-cells':
+ const: 1
+ description:
+ The single cell is the domid (domain ID) of the domain where the backend
+ is running.
+
+required:
+ - compatible
+ - "#iommu-cells"
+
+additionalProperties: false
+
+examples:
+ - |
+ iommu {
+ compatible = "xen,grant-dma";
+ #iommu-cells = <1>;
+ };