AddressSpace *pci_device_iommu_address_space(PCIDevice *dev)
{
PCIBus *bus = PCI_BUS(dev->bus);
+ PCIBus *iommu_bus = bus;
- if (bus->iommu_fn) {
- return bus->iommu_fn(bus, bus->iommu_opaque, dev->devfn);
+ while(iommu_bus && !iommu_bus->iommu_fn && iommu_bus->parent_dev) {
+ iommu_bus = PCI_BUS(iommu_bus->parent_dev->bus);
}
-
- if (bus->parent_dev) {
- /** We are ignoring the bus master DMA bit of the bridge
- * as it would complicate things such as VFIO for no good reason */
- return pci_device_iommu_address_space(bus->parent_dev);
+ if (iommu_bus && iommu_bus->iommu_fn) {
+ return iommu_bus->iommu_fn(bus, iommu_bus->iommu_opaque, dev->devfn);
}
-
return &address_space_memory;
}