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e1822cfdad
By implementing this virtio feature, we let the virtio-iommu driver call the device backend so that it can probe each device that gets attached. Through this probing, the device provides a range of reserved memory related to MSI. This is mandatory for x86 architecture as we want to avoid the default MSI range assigned by the virtio-iommu driver if no range is provided at all. The default range is 0x8000000-0x80FFFFF but it only makes sense for ARM architectures. Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>