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Diffstat (limited to 'hw/pci/pci.c')
-rw-r--r--hw/pci/pci.c24
1 files changed, 18 insertions, 6 deletions
diff --git a/hw/pci/pci.c b/hw/pci/pci.c
index 4c004f5daa..8c33352c9a 100644
--- a/hw/pci/pci.c
+++ b/hw/pci/pci.c
@@ -812,12 +812,7 @@ static PCIDevice *do_pci_register_device(PCIDevice *pci_dev, PCIBus *bus,
}
pci_dev->bus = bus;
- if (bus->iommu_fn) {
- dma_as = bus->iommu_fn(bus, bus->iommu_opaque, devfn);
- } else {
- /* FIXME: inherit memory region from bus creator */
- dma_as = &address_space_memory;
- }
+ dma_as = pci_device_iommu_address_space(pci_dev);
memory_region_init_alias(&pci_dev->bus_master_enable_region,
OBJECT(pci_dev), "bus master",
@@ -2239,6 +2234,23 @@ static void pci_device_class_init(ObjectClass *klass, void *data)
k->props = pci_props;
}
+AddressSpace *pci_device_iommu_address_space(PCIDevice *dev)
+{
+ PCIBus *bus = PCI_BUS(dev->bus);
+
+ if (bus->iommu_fn) {
+ return bus->iommu_fn(bus, bus->iommu_opaque, dev->devfn);
+ }
+
+ 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);
+ }
+
+ return &address_space_memory;
+}
+
void pci_setup_iommu(PCIBus *bus, PCIIOMMUFunc fn, void *opaque)
{
bus->iommu_fn = fn;