conf, qemu: Add newer shmem models

The old ivshmem is deprecated in QEMU, so let's use the better
ivshmem-{plain,doorbell} variants instead.
Signed-off-by: NMartin Kletzander <mkletzan@redhat.com>

docs/formatdomain.html.in

@@ -6826,10 +6826,11 @@ qemu-kvm -net nic,model=? /dev/null
   ...
   <devices>
     <shmem name='my_shmem0'>
+      <model type='ivshmem-plain'/>
       <size unit='M'>4</size>
     </shmem>
     <shmem name='shmem_server'>
-      <model type='ivshmem'/>
+      <model type='ivshmem-doorbell'/>
       <size unit='M'>2</size>
       <server path='/tmp/socket-shmem'/>
       <msi vectors='32' ioeventfd='on'/>
@@ -6848,8 +6849,11 @@ qemu-kvm -net nic,model=? /dev/null
     <dd>
       Attribute <code>type</code> of the optional element <code>model</code>
       specifies the model of the underlying device providing the
-      <code>shmem</code> device.  Currently the only supported model is
-      <code>ivshmem</code>.
+      <code>shmem</code> device.  The models currently supported are
+      <code>ivshmem</code> (supports both server and server-less shmem, but is
+      deprecated by newer QEMU in favour of the -plain and -doorbell variants),
+      <code>ivshmem-plain</code> (only for server-less shmem) and
+      <code>ivshmem-doorbell</code> (only for shmem with the server).
     </dd>
     <dt><code>size</code></dt>
     <dd>

docs/schemas/domaincommon.rng

@@ -3596,6 +3596,8 @@
             <attribute name="type">
               <choice>
                 <value>ivshmem</value>
+                <value>ivshmem-plain</value>
+                <value>ivshmem-doorbell</value>
               </choice>
             </attribute>
           </element>

src/conf/domain_conf.c

@@ -845,7 +845,9 @@ VIR_ENUM_IMPL(virDomainMemoryModel, VIR_DOMAIN_MEMORY_MODEL_LAST,
               "", "dimm")
 
 VIR_ENUM_IMPL(virDomainShmemModel, VIR_DOMAIN_SHMEM_MODEL_LAST,
-              "ivshmem")
+              "ivshmem",
+              "ivshmem-plain",
+              "ivshmem-doorbell")
 
 static virClassPtr virDomainObjClass;
 static virClassPtr virDomainXMLOptionClass;

src/conf/domain_conf.h

@@ -1564,6 +1564,8 @@ struct _virDomainNVRAMDef {
 
 typedef enum {
     VIR_DOMAIN_SHMEM_MODEL_IVSHMEM,
+    VIR_DOMAIN_SHMEM_MODEL_IVSHMEM_PLAIN,
+    VIR_DOMAIN_SHMEM_MODEL_IVSHMEM_DOORBELL,
 
     VIR_DOMAIN_SHMEM_MODEL_LAST
 } virDomainShmemModel;

src/qemu/qemu_command.c

@@ -8530,6 +8530,13 @@ qemuBuildShmemCommandLine(virLogManagerPtr logManager,
         devstr = qemuBuildShmemDevLegacyStr(def, shmem, qemuCaps);
         break;
 
+    case VIR_DOMAIN_SHMEM_MODEL_IVSHMEM_PLAIN:
+    case VIR_DOMAIN_SHMEM_MODEL_IVSHMEM_DOORBELL:
+        virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+                       _("%s device is not supported with this QEMU binary"),
+                       virDomainShmemModelTypeToString(shmem->model));
+        break;
+
     case VIR_DOMAIN_SHMEM_MODEL_LAST:
         break;
     }

tests/qemuxml2argvdata/qemuxml2argv-shmem-plain-doorbell.xml

+<domain type='qemu'>
+  <name>QEMUGuest1</name>
+  <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+  <memory unit='KiB'>219136</memory>
+  <currentMemory unit='KiB'>219136</currentMemory>
+  <vcpu placement='static'>1</vcpu>
+  <os>
+    <type arch='i686' machine='pc'>hvm</type>
+    <boot dev='hd'/>
+  </os>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>destroy</on_crash>
+  <devices>
+    <emulator>/usr/bin/qemu</emulator>
+    <controller type='usb' index='0'/>
+    <controller type='pci' index='0' model='pci-root'/>
+    <input type='mouse' bus='ps2'/>
+    <input type='keyboard' bus='ps2'/>
+    <memballoon model='none'/>
+    <shmem name='shmem0'>
+      <model type='ivshmem-plain'/>
+    </shmem>
+    <shmem name='shmem1'>
+      <model type='ivshmem-plain'/>
+      <size unit='M'>128</size>
+    </shmem>
+    <shmem name='shmem2'>
+      <model type='ivshmem-plain'/>
+      <size unit='M'>256</size>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
+    </shmem>
+    <shmem name='shmem3'>
+      <model type='ivshmem-doorbell'/>
+      <server/>
+    </shmem>
+    <shmem name='shmem4'>
+      <model type='ivshmem-doorbell'/>
+      <server path='/tmp/shmem4-sock'/>
+    </shmem>
+    <shmem name='shmem5'>
+      <model type='ivshmem-doorbell'/>
+      <server path='/tmp/shmem5-sock'/>
+      <msi ioeventfd='off'/>
+    </shmem>
+    <shmem name='shmem6'>
+      <model type='ivshmem-doorbell'/>
+      <server path='/tmp/shmem6-sock'/>
+      <msi vectors='16'/>
+    </shmem>
+    <shmem name='shmem7'>
+      <model type='ivshmem-doorbell'/>
+      <server path='/tmp/shmem7-sock'/>
+      <msi vectors='32' ioeventfd='on'/>
+    </shmem>
+  </devices>
+</domain>

tests/qemuxml2xmloutdata/qemuxml2xmlout-shmem-plain-doorbell.xml

+<domain type='qemu'>
+  <name>QEMUGuest1</name>
+  <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+  <memory unit='KiB'>219136</memory>
+  <currentMemory unit='KiB'>219136</currentMemory>
+  <vcpu placement='static'>1</vcpu>
+  <os>
+    <type arch='i686' machine='pc'>hvm</type>
+    <boot dev='hd'/>
+  </os>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>destroy</on_crash>
+  <devices>
+    <emulator>/usr/bin/qemu</emulator>
+    <controller type='usb' index='0'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
+    </controller>
+    <controller type='pci' index='0' model='pci-root'/>
+    <input type='mouse' bus='ps2'/>
+    <input type='keyboard' bus='ps2'/>
+    <memballoon model='none'/>
+    <shmem name='shmem0'>
+      <model type='ivshmem-plain'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
+    </shmem>
+    <shmem name='shmem1'>
+      <model type='ivshmem-plain'/>
+      <size unit='M'>128</size>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
+    </shmem>
+    <shmem name='shmem2'>
+      <model type='ivshmem-plain'/>
+      <size unit='M'>256</size>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
+    </shmem>
+    <shmem name='shmem3'>
+      <model type='ivshmem-doorbell'/>
+      <server/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
+    </shmem>
+    <shmem name='shmem4'>
+      <model type='ivshmem-doorbell'/>
+      <server path='/tmp/shmem4-sock'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/>
+    </shmem>
+    <shmem name='shmem5'>
+      <model type='ivshmem-doorbell'/>
+      <server path='/tmp/shmem5-sock'/>
+      <msi ioeventfd='off'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0'/>
+    </shmem>
+    <shmem name='shmem6'>
+      <model type='ivshmem-doorbell'/>
+      <server path='/tmp/shmem6-sock'/>
+      <msi vectors='16'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x09' function='0x0'/>
+    </shmem>
+    <shmem name='shmem7'>
+      <model type='ivshmem-doorbell'/>
+      <server path='/tmp/shmem7-sock'/>
+      <msi vectors='32' ioeventfd='on'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x0a' function='0x0'/>
+    </shmem>
+  </devices>
+</domain>

tests/qemuxml2xmltest.c

@@ -822,6 +822,7 @@ mymain(void)
     DO_TEST("tap-vhost", NONE);
     DO_TEST("tap-vhost-incorrect", NONE);
     DO_TEST("shmem", NONE);
+    DO_TEST("shmem-plain-doorbell", NONE);
     DO_TEST("smbios", NONE);
     DO_TEST("smbios-multiple-type2", NONE);