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authorJean-Philippe Brucker <jean-philippe.brucker@arm.com>2019-01-15 12:19:54 +0000
committerMichael S. Tsirkin <mst@redhat.com>2019-06-06 17:32:13 -0400
commit6c9e92ef8bdde13398caae1989b0292524d6475e (patch)
tree545a30050b7453b7d7dea7d4273f54c24a963590 /drivers/of
parent8447d84e35f2c3b2e76f80319d0b547a9521bafa (diff)
downloadlinux-6c9e92ef8bdde13398caae1989b0292524d6475e.tar.bz2
dt-bindings: virtio: Add virtio-pci-iommu node
Some systems implement virtio-iommu as a PCI endpoint. The operating system needs to discover the relationship between IOMMU and masters long before the PCI endpoint gets probed. Add a PCI child node to describe the virtio-iommu device. The virtio-pci-iommu is conceptually split between a PCI programming interface and a translation component on the parent bus. The latter doesn't have a node in the device tree. The virtio-pci-iommu node describes both, by linking the PCI endpoint to "iommus" property of DMA master nodes and to "iommu-map" properties of bus nodes. Reviewed-by: Rob Herring <robh@kernel.org> Reviewed-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker@arm.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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