On Fri, 12 Oct 2018 15:59:12 +0100, Jean-Philippe Brucker wrote: > Some systems implement virtio-iommu as a PCI endpoint. The operating > systems 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. > > Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker@xxxxxxx> > --- > .../devicetree/bindings/virtio/iommu.txt | 66 +++++++++++++++++++ > 1 file changed, 66 insertions(+) > create mode 100644 Documentation/devicetree/bindings/virtio/iommu.txt > Reviewed-by: Rob Herring <robh@xxxxxxxxxx>
