[PATCH 7/8] Add virtio revision to rng devices

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<rng model='virtio'>
  <backend model='random'>/dev/random</backend>
  <virtio revision='1'/>
</rng>

https://bugzilla.redhat.com/show_bug.cgi?id=1227354
---
 docs/formatdomain.html.in                                   | 9 +++++++++
 docs/schemas/domaincommon.rng                               | 3 +++
 src/conf/domain_conf.c                                      | 5 +++++
 src/conf/domain_conf.h                                      | 1 +
 tests/qemuxml2argvdata/qemuxml2argv-virtio-revision.xml     | 5 +++++
 tests/qemuxml2xmloutdata/qemuxml2xmlout-virtio-revision.xml | 5 +++++
 6 files changed, 28 insertions(+)

diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in
index 6c8ea15..bc9a3db 100644
--- a/docs/formatdomain.html.in
+++ b/docs/formatdomain.html.in
@@ -6502,6 +6502,15 @@ qemu-kvm -net nic,model=? /dev/null
           </dd>
         </dl>
       </dd>
+      <dt><code>virtio</code></dt>
+      <dd>
+        <p>
+          An optional <code>virtio</code> element can be used to enforce a particular
+          virtio revision in QEMU. The valid values for the <code>revision</code>
+          are <code>0</code> and <code>1</code>.
+          <span class='since'>Since 2.2.0</span>
+        </p>
+      </dd>
 
     </dl>
 
diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
index 05351a0..dbaa1d7 100644
--- a/docs/schemas/domaincommon.rng
+++ b/docs/schemas/domaincommon.rng
@@ -4750,6 +4750,9 @@
         <optional>
           <ref name="address"/>
         </optional>
+        <optional>
+          <ref name="virtioRevision"/>
+        </optional>
       </interleave>
     </element>
   </define>
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index bb91b0c..9f1f20f 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -12046,6 +12046,9 @@ virDomainRNGDefParseXML(xmlNodePtr node,
     if (virDomainDeviceInfoParseXML(node, NULL, &def->info, flags) < 0)
         goto error;
 
+    if (virDomainVirtioRevisionParseXML(ctxt, &def->virtio_rev) < 0)
+        goto error;
+
  cleanup:
     VIR_FREE(model);
     VIR_FREE(backend);
@@ -21690,6 +21693,8 @@ virDomainRNGDefFormat(virBufferPtr buf,
             return -1;
     }
 
+    virDomainVirtioRevisionFormatXML(buf, def->virtio_rev);
+
     virBufferAdjustIndent(buf, -2);
     virBufferAddLit(buf, "</rng>\n");
     return 0;
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index 880930f..9c806a4 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -1942,6 +1942,7 @@ struct _virDomainRNGDef {
     } source;
 
     virDomainDeviceInfo info;
+    virDomainVirtioRevision virtio_rev;
 };
 
 typedef enum {
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-virtio-revision.xml b/tests/qemuxml2argvdata/qemuxml2argv-virtio-revision.xml
index 2e13808..94c844e 100644
--- a/tests/qemuxml2argvdata/qemuxml2argv-virtio-revision.xml
+++ b/tests/qemuxml2argvdata/qemuxml2argv-virtio-revision.xml
@@ -98,5 +98,10 @@
       <address type='pci' domain='0x0000' bus='0x00' slot='0x0c' function='0x0'/>
       <virtio revision='0'/>
     </memballoon>
+    <rng model='virtio'>
+      <backend model='random'>/dev/random</backend>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x0d' function='0x0'/>
+      <virtio revision='1'/>
+    </rng>
   </devices>
 </domain>
diff --git a/tests/qemuxml2xmloutdata/qemuxml2xmlout-virtio-revision.xml b/tests/qemuxml2xmloutdata/qemuxml2xmlout-virtio-revision.xml
index 2e13808..94c844e 100644
--- a/tests/qemuxml2xmloutdata/qemuxml2xmlout-virtio-revision.xml
+++ b/tests/qemuxml2xmloutdata/qemuxml2xmlout-virtio-revision.xml
@@ -98,5 +98,10 @@
       <address type='pci' domain='0x0000' bus='0x00' slot='0x0c' function='0x0'/>
       <virtio revision='0'/>
     </memballoon>
+    <rng model='virtio'>
+      <backend model='random'>/dev/random</backend>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x0d' function='0x0'/>
+      <virtio revision='1'/>
+    </rng>
   </devices>
 </domain>
-- 
2.7.3

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