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https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git
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6ac02df3ff
'virtio,mmio' devices are always coherent within a guest. As Arm DTs are default non-coherent, the 'dma-coherent' property needs to be set on the virtio device to mark them as such. This aligns with the QEMU 'virt' machine DTB. Signed-off-by: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20220310013528.549030-1-robh@kernel.org
64 lines
1.2 KiB
YAML
64 lines
1.2 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/virtio/mmio.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: virtio memory mapped devices
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maintainers:
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- Jean-Philippe Brucker <jean-philippe@linaro.org>
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description:
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See https://www.oasis-open.org/committees/tc_home.php?wg_abbrev=virtio for
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more details.
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properties:
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compatible:
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const: virtio,mmio
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reg:
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maxItems: 1
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dma-coherent: true
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interrupts:
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maxItems: 1
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'#iommu-cells':
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description: Required when the node corresponds to a virtio-iommu device.
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const: 1
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iommus:
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description: Required for devices making accesses thru an IOMMU.
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maxItems: 1
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required:
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- compatible
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- reg
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- interrupts
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additionalProperties:
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type: object
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examples:
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- |
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virtio@3000 {
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compatible = "virtio,mmio";
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reg = <0x3000 0x100>;
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interrupts = <41>;
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/* Device has endpoint ID 23 */
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iommus = <&viommu 23>;
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};
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viommu: iommu@3100 {
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compatible = "virtio,mmio";
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reg = <0x3100 0x100>;
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interrupts = <42>;
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#iommu-cells = <1>;
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};
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...
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