qemu: Assign PCI addresses for mediated devices as well

So far, the official support is for x86_64 arch guests so unless a
different device API than vfio-pci is available let's only turn on
support for PCI address assignment. Once a different device API is
introduced, we can enable another address type easily.
Signed-off-by: NErik Skultety <eskultet@redhat.com>

src/qemu/qemu_domain.h

@@ -34,6 +34,7 @@
 # include "qemu_agent.h"
 # include "qemu_conf.h"
 # include "qemu_capabilities.h"
+# include "virmdev.h"
 # include "virchrdev.h"
 # include "virobject.h"
 # include "logging/log_manager.h"

src/qemu/qemu_domain_address.c

@@ -619,7 +619,8 @@ qemuDomainDeviceCalculatePCIConnectFlags(virDomainDeviceDefPtr dev,
         virPCIDeviceAddressPtr hostAddr = &hostdev->source.subsys.u.pci.addr;
 
         if (hostdev->mode != VIR_DOMAIN_HOSTDEV_MODE_SUBSYS ||
-            hostdev->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_PCI) {
+            (hostdev->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_PCI &&
+             hostdev->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_MDEV)) {
             return 0;
         }
 
@@ -643,6 +644,9 @@ qemuDomainDeviceCalculatePCIConnectFlags(virDomainDeviceDefPtr dev,
             return pcieFlags;
         }
 
+        if (hostdev->source.subsys.type == VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_MDEV)
+            return pcieFlags;
+
         if (!(pciDev = virPCIDeviceNew(hostAddr->domain,
                                        hostAddr->bus,
                                        hostAddr->slot,
@@ -1727,13 +1731,17 @@ qemuDomainAssignDevicePCISlots(virDomainDefPtr def,
 
     /* Host PCI devices */
     for (i = 0; i < def->nhostdevs; i++) {
+        virDomainHostdevSubsysPtr subsys = &def->hostdevs[i]->source.subsys;
         if (!virDeviceInfoPCIAddressWanted(def->hostdevs[i]->info))
             continue;
         if (def->hostdevs[i]->mode != VIR_DOMAIN_HOSTDEV_MODE_SUBSYS)
             continue;
-        if (def->hostdevs[i]->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_PCI &&
-            def->hostdevs[i]->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_SCSI_HOST)
+        if (subsys->type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_PCI &&
+            subsys->type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_SCSI_HOST &&
+            !(subsys->type == VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_MDEV &&
+              subsys->u.mdev.model == VIR_MDEV_MODEL_TYPE_VFIO_PCI)) {
             continue;
+        }
 
         if (qemuDomainPCIAddressReserveNextAddr(addrs,
                                                 def->hostdevs[i]->info) < 0)