From: Eric Auger <eric.auger@redhat.com>

Store the aliased bus and devfn in the HostIOMMUDevice.
This will be useful to handle info that are iommu group
specific and not device specific (such as reserved
iova ranges).

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
---
 include/sysemu/host_iommu_device.h | 2 ++
 hw/pci/pci.c                       | 8 ++++++--
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/include/sysemu/host_iommu_device.h b/include/sysemu/host_iommu_device.h
index 40e0fa13efb5c023bc9b46fc99bf553cb93adf24..ee6c813c8b2299ed1d1d3b34d143c20a8ec27400 100644
--- a/include/sysemu/host_iommu_device.h
+++ b/include/sysemu/host_iommu_device.h
@@ -35,6 +35,8 @@ struct HostIOMMUDevice {
 
     char *name;
     void *agent; /* pointer to agent device, ie. VFIO or VDPA device */
+    PCIBus *aliased_bus;
+    int aliased_devfn;
     HostIOMMUDeviceCaps caps;
 };
 
diff --git a/hw/pci/pci.c b/hw/pci/pci.c
index c8a8aab30646c5e37816f49f6ef9d1bdf8be241f..50b86d57907411ee7646b436dda53503eca33c13 100644
--- a/hw/pci/pci.c
+++ b/hw/pci/pci.c
@@ -2745,11 +2745,15 @@ AddressSpace *pci_device_iommu_address_space(PCIDevice *dev)
 bool pci_device_set_iommu_device(PCIDevice *dev, HostIOMMUDevice *hiod,
                                  Error **errp)
 {
-    PCIBus *iommu_bus;
+    PCIBus *iommu_bus, *aliased_bus;
+    int aliased_devfn;
 
     /* set_iommu_device requires device's direct BDF instead of aliased BDF */
-    pci_device_get_iommu_bus_devfn(dev, &iommu_bus, NULL, NULL);
+    pci_device_get_iommu_bus_devfn(dev, &iommu_bus,
+                                   &aliased_bus, &aliased_devfn);
     if (iommu_bus && iommu_bus->iommu_ops->set_iommu_device) {
+        hiod->aliased_bus = aliased_bus;
+        hiod->aliased_devfn = aliased_devfn;
         return iommu_bus->iommu_ops->set_iommu_device(pci_get_bus(dev),
                                                       iommu_bus->iommu_opaque,
                                                       dev->devfn, hiod, errp);
-- 
2.45.2