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| author |   Jean-Philippe Brucker <jean-philippe.brucker@arm.com> | 2019-01-15 12:19:54 +0000 |
|---|---|---|
| committer |   Michael S. Tsirkin <mst@redhat.com> | 2019-06-06 17:32:13 -0400 |
| commit | 6c9e92ef8bdde13398caae1989b0292524d6475e (patch) | |
| tree | 545a30050b7453b7d7dea7d4273f54c24a963590 /drivers/of | |
| parent | dt-bindings: virtio-mmio: Add IOMMU description (diff) | |
| download | linux-dev-6c9e92ef8bdde13398caae1989b0292524d6475e.tar.xz linux-dev-6c9e92ef8bdde13398caae1989b0292524d6475e.zip | |
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>
Diffstat (limited to 'drivers/of')
0 files changed, 0 insertions, 0 deletions