qemu: Support hostdev model=virtio-{non-}transitional

Add <hostdev> protocol=vhost model handling for virtio transitional
devices. Ex:

  <hostdev mode='subsystem' type='scsi_host' model='virtio-transitional'>
    <source protocol='vhost' wwpn=X/>
  </hostdev>

* "virtio-transitional" maps to qemu "vhost-scsi-pci-transitional"
* "virtio-non-transitional" maps to qemu "vhost-scsi-pci-non-transitional"

Reviewed-by: Andrea Bolognani <abologna@redhat.com>
Signed-off-by: Cole Robinson <crobinso@redhat.com>

src/qemu/qemu_command.c

@@ -485,12 +485,18 @@ qemuBuildVirtioDevStr(virBufferPtr buf,
                                          "virtio-non-transitional");
             break;
 
+        case VIR_DOMAIN_DEVICE_HOSTDEV:
+            if (device.data.hostdev->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_SCSI_HOST)
+                return 0;
+            has_tmodel = device.data.hostdev->source.subsys.u.scsi_host.model == VIR_DOMAIN_HOSTDEV_SUBSYS_SCSI_VHOST_MODEL_TYPE_VIRTIO_TRANSITIONAL;
+            has_ntmodel = device.data.hostdev->source.subsys.u.scsi_host.model == VIR_DOMAIN_HOSTDEV_SUBSYS_SCSI_VHOST_MODEL_TYPE_VIRTIO_NON_TRANSITIONAL;
+            break;
+
         case VIR_DOMAIN_DEVICE_LEASE:
         case VIR_DOMAIN_DEVICE_FS:
         case VIR_DOMAIN_DEVICE_INPUT:
         case VIR_DOMAIN_DEVICE_SOUND:
         case VIR_DOMAIN_DEVICE_VIDEO:
-        case VIR_DOMAIN_DEVICE_HOSTDEV:
         case VIR_DOMAIN_DEVICE_WATCHDOG:
         case VIR_DOMAIN_DEVICE_CONTROLLER:
         case VIR_DOMAIN_DEVICE_GRAPHICS:

src/qemu/qemu_domain_address.c

@@ -794,11 +794,22 @@ qemuDomainDeviceCalculatePCIConnectFlags(virDomainDeviceDefPtr dev,
             return pcieFlags;
 
         /* according to pbonzini, from the guest PoV vhost-scsi devices
-         * are the same as virtio-scsi, so they should use virtioFlags
-         * (same as virtio-scsi) to determine Express vs. legacy placement
+         * are the same as virtio-scsi, so they should follow virtio logic
          */
-        if (hostdev->source.subsys.type == VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_SCSI_HOST)
-            return virtioFlags;
+        if (hostdev->source.subsys.type == VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_SCSI_HOST) {
+            switch ((virDomainHostdevSubsysSCSIVHostModelType) hostdev->source.subsys.u.scsi_host.model) {
+            case VIR_DOMAIN_HOSTDEV_SUBSYS_SCSI_VHOST_MODEL_TYPE_VIRTIO_TRANSITIONAL:
+                /* Transitional devices only work in conventional PCI slots */
+                return pciFlags;
+            case VIR_DOMAIN_HOSTDEV_SUBSYS_SCSI_VHOST_MODEL_TYPE_VIRTIO:
+            case VIR_DOMAIN_HOSTDEV_SUBSYS_SCSI_VHOST_MODEL_TYPE_VIRTIO_NON_TRANSITIONAL:
+            case VIR_DOMAIN_HOSTDEV_SUBSYS_SCSI_VHOST_MODEL_TYPE_DEFAULT:
+                return virtioFlags;
+            case VIR_DOMAIN_HOSTDEV_SUBSYS_SCSI_VHOST_MODEL_TYPE_LAST:
+                break;
+            }
+            return 0;
+        }
 
         if (!(pciDev = virPCIDeviceNew(hostAddr->domain,
                                        hostAddr->bus,

tests/qemuxml2argvdata/virtio-non-transitional.x86_64-3.1.0.args

@@ -34,8 +34,8 @@ addr=0x0,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 \
 -netdev user,id=hostnet0 \
 -device virtio-net-pci,disable-legacy=on,disable-modern=off,netdev=hostnet0,\
 id=net0,mac=00:11:22:33:44:55,bus=pci.1,addr=0x0 \
--device vhost-scsi-pci,wwpn=naa.5123456789abcde0,vhostfd=3,id=hostdev0,\
-bus=pci.3,addr=0x0 \
+-device vhost-scsi-pci,disable-legacy=on,disable-modern=off,\
+wwpn=naa.5123456789abcde0,vhostfd=3,id=hostdev0,bus=pci.3,addr=0x0 \
 -sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,\
 resourcecontrol=deny \
 -msg timestamp=on

tests/qemuxml2argvdata/virtio-non-transitional.x86_64-latest.args

@@ -34,8 +34,8 @@ drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 \
 -netdev user,id=hostnet0 \
 -device virtio-net-pci-non-transitional,netdev=hostnet0,id=net0,\
 mac=00:11:22:33:44:55,bus=pci.1,addr=0x0 \
--device vhost-scsi-pci,wwpn=naa.5123456789abcde0,vhostfd=3,id=hostdev0,\
-bus=pci.3,addr=0x0 \
+-device vhost-scsi-pci-non-transitional,wwpn=naa.5123456789abcde0,vhostfd=3,\
+id=hostdev0,bus=pci.3,addr=0x0 \
 -sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,\
 resourcecontrol=deny \
 -msg timestamp=on

tests/qemuxml2argvdata/virtio-transitional.x86_64-3.1.0.args

@@ -27,15 +27,14 @@ file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
 addr=0x1 \
 -device pcie-pci-bridge,id=pci.2,bus=pci.1,addr=0x0 \
 -device pcie-root-port,port=0x9,chassis=3,id=pci.3,bus=pcie.0,addr=0x1.0x1 \
--device pcie-root-port,port=0xa,chassis=4,id=pci.4,bus=pcie.0,addr=0x1.0x2 \
 -drive file=/dev/HostVG/QEMUGuest1,format=raw,if=none,id=drive-virtio-disk0 \
 -device virtio-blk-pci,disable-legacy=off,disable-modern=off,scsi=off,\
 bus=pci.2,addr=0x2,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 \
 -netdev user,id=hostnet0 \
 -device virtio-net-pci,disable-legacy=off,disable-modern=off,netdev=hostnet0,\
 id=net0,mac=00:11:22:33:44:55,bus=pci.2,addr=0x1 \
--device vhost-scsi-pci,wwpn=naa.5123456789abcde0,vhostfd=3,id=hostdev0,\
-bus=pci.3,addr=0x0 \
+-device vhost-scsi-pci,disable-legacy=off,disable-modern=off,\
+wwpn=naa.5123456789abcde0,vhostfd=3,id=hostdev0,bus=pci.2,addr=0x3 \
 -sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,\
 resourcecontrol=deny \
 -msg timestamp=on

tests/qemuxml2argvdata/virtio-transitional.x86_64-latest.args

@@ -27,15 +27,14 @@ file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
 addr=0x1 \
 -device pcie-pci-bridge,id=pci.2,bus=pci.1,addr=0x0 \
 -device pcie-root-port,port=0x9,chassis=3,id=pci.3,bus=pcie.0,addr=0x1.0x1 \
--device pcie-root-port,port=0xa,chassis=4,id=pci.4,bus=pcie.0,addr=0x1.0x2 \
 -drive file=/dev/HostVG/QEMUGuest1,format=raw,if=none,id=drive-virtio-disk0 \
 -device virtio-blk-pci-transitional,scsi=off,bus=pci.2,addr=0x2,\
 drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 \
 -netdev user,id=hostnet0 \
 -device virtio-net-pci-transitional,netdev=hostnet0,id=net0,\
 mac=00:11:22:33:44:55,bus=pci.2,addr=0x1 \
--device vhost-scsi-pci,wwpn=naa.5123456789abcde0,vhostfd=3,id=hostdev0,\
-bus=pci.3,addr=0x0 \
+-device vhost-scsi-pci-transitional,wwpn=naa.5123456789abcde0,vhostfd=3,\
+id=hostdev0,bus=pci.2,addr=0x3 \
 -sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,\
 resourcecontrol=deny \
 -msg timestamp=on

tests/qemuxml2xmloutdata/virtio-transitional.xml

@@ -39,11 +39,6 @@
       <target chassis='3' port='0x9'/>
       <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
     </controller>
-    <controller type='pci' index='4' model='pcie-root-port'>
-      <model name='pcie-root-port'/>
-      <target chassis='4' port='0xa'/>
-      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
-    </controller>
     <interface type='user'>
       <mac address='00:11:22:33:44:55'/>
       <model type='virtio-transitional'/>
@@ -53,7 +48,7 @@
     <input type='keyboard' bus='ps2'/>
     <hostdev mode='subsystem' type='scsi_host' managed='no' model='virtio-transitional'>
       <source protocol='vhost' wwpn='naa.5123456789abcde0'/>
-      <address type='pci' domain='0x0000' bus='0x03' slot='0x00' function='0x0'/>
+      <address type='pci' domain='0x0000' bus='0x02' slot='0x03' function='0x0'/>
     </hostdev>
     <memballoon model='none'/>
   </devices>