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[libvirt] [PATCH] Add support for qxl.revision in domain XML



QXL devices have an associated 'revision' which is raised when
new features have been introduced which would break migration
to older versions. This commit makes it possible to set this
revision as QEMU sometimes support newer QXL revisions than what
it defaults to.
---
 docs/formatdomain.html.in                               |  5 ++++-
 docs/schemas/domaincommon.rng                           |  5 +++++
 src/conf/domain_conf.c                                  | 17 +++++++++++++++++
 src/conf/domain_conf.h                                  |  1 +
 src/qemu/qemu_command.c                                 |  8 ++++++++
 .../qemuxml2argv-graphics-spice-compression.args        |  3 ++-
 .../qemuxml2argv-graphics-spice-compression.xml         |  4 ++--
 .../qemuxml2argv-graphics-spice-qxl-vga.args            |  3 ++-
 .../qemuxml2argv-graphics-spice-qxl-vga.xml             |  4 ++--
 tests/qemuxml2argvdata/qemuxml2argv-graphics-spice.args |  3 ++-
 tests/qemuxml2argvdata/qemuxml2argv-graphics-spice.xml  |  4 ++--
 11 files changed, 47 insertions(+), 10 deletions(-)

diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in
index 7ad8aea..4b269c8 100644
--- a/docs/formatdomain.html.in
+++ b/docs/formatdomain.html.in
@@ -3569,7 +3569,10 @@ qemu-kvm -net nic,model=? /dev/null
         attribute <code>ram</code> (<span class="since">since
         1.0.2</span>) is allowed for "qxl" type only and specifies
         the size of the primary bar, while <code>vram</code> specifies the
-        secondary bar size.  If "ram" is not supplied a default value is used.
+        secondary bar size.  If "ram" or "vram" are not supplied a default
+        value is used. The optional attribute <code>revision</code> (<span
+        class="since">since 1.0.3</span>) specifies the revision of
+        the QXL device, newer revisions provides more functionality.
       </dd>
 
       <dt><code>model</code></dt>
diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
index 049f232..fc78e2d 100644
--- a/docs/schemas/domaincommon.rng
+++ b/docs/schemas/domaincommon.rng
@@ -2280,6 +2280,11 @@
                   <ref name="unsignedInt"/>
                 </attribute>
               </optional>
+              <optional>
+                <attribute name="revision">
+                  <ref name="unsignedInt"/>
+                </attribute>
+              </optional>
             </group>
           </choice>
           <optional>
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 5782abb..83be711 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -7391,6 +7391,7 @@ virDomainVideoDefParseXML(const xmlNodePtr node,
     char *vram = NULL;
     char *ram = NULL;
     char *primary = NULL;
+    char *revision = NULL;
 
     if (VIR_ALLOC(def) < 0) {
         virReportOOMError();
@@ -7406,6 +7407,7 @@ virDomainVideoDefParseXML(const xmlNodePtr node,
                 ram = virXMLPropString(cur, "ram");
                 vram = virXMLPropString(cur, "vram");
                 heads = virXMLPropString(cur, "heads");
+                revision = virXMLPropString(cur, "revision");
 
                 if ((primary = virXMLPropString(cur, "primary")) != NULL)
                     if (STREQ(primary, "yes"))
@@ -7456,6 +7458,19 @@ virDomainVideoDefParseXML(const xmlNodePtr node,
         def->vram = virDomainVideoDefaultRAM(dom, def->type);
     }
 
+    if (revision) {
+        if (def->type != VIR_DOMAIN_VIDEO_TYPE_QXL) {
+            virReportError(VIR_ERR_XML_ERROR, "%s",
+                           _("revision attribute only supported for type of qxl"));
+            goto error;
+        }
+        if (virStrToLong_ui(revision, NULL, 10, &def->revision) < 0) {
+            virReportError(VIR_ERR_XML_ERROR,
+                           _("cannot parse video revision '%s'"), revision);
+            goto error;
+        }
+    }
+
     if (heads) {
         if (virStrToLong_ui(heads, NULL, 10, &def->heads) < 0) {
             virReportError(VIR_ERR_INTERNAL_ERROR,
@@ -13406,6 +13421,8 @@ virDomainVideoDefFormat(virBufferPtr buf,
         virBufferAsprintf(buf, " heads='%u'", def->heads);
     if (def->primary)
         virBufferAddLit(buf, " primary='yes'");
+    if (def->revision)
+        virBufferAsprintf(buf, " revision='%u'", def->revision);
     if (def->accel) {
         virBufferAddLit(buf, ">\n");
         virDomainVideoAccelDefFormat(buf, def->accel);
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index 9a9e0b1..81925b1 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -1160,6 +1160,7 @@ struct _virDomainVideoDef {
     unsigned int ram;  /* kibibytes (multiples of 1024) */
     unsigned int vram; /* kibibytes (multiples of 1024) */
     unsigned int heads;
+    unsigned int revision;
     bool primary;
     virDomainVideoAccelDefPtr accel;
     virDomainDeviceInfo info;
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index f6273c1..e45c808 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -3598,6 +3598,9 @@ qemuBuildDeviceVideoStr(virDomainVideoDefPtr video,
 
         /* QEMU accepts bytes for vram_size. */
         virBufferAsprintf(&buf, ",vram_size=%u", video->vram * 1024);
+
+        if (video->revision != 0)
+            virBufferAsprintf(&buf, ",revision=%u", video->revision);
     }
 
     if (qemuBuildDeviceAddressStr(&buf, &video->info, caps) < 0)
@@ -6631,6 +6634,11 @@ qemuBuildCommandLine(virConnectPtr conn,
                         virCommandAddArgFormat(cmd, "%s.vram_size=%u",
                                                dev, vram * 1024);
                     }
+                    if (def->videos[0]->revision) {
+                        virCommandAddArg(cmd, "-global");
+                        virCommandAddArgFormat(cmd, "%s.revision=%u",
+                                               dev, def->videos[0]->revision);
+                    }
                 }
             }
 
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-graphics-spice-compression.args b/tests/qemuxml2argvdata/qemuxml2argv-graphics-spice-compression.args
index 59f064b..05f5579 100644
--- a/tests/qemuxml2argvdata/qemuxml2argv-graphics-spice-compression.args
+++ b/tests/qemuxml2argvdata/qemuxml2argv-graphics-spice-compression.args
@@ -7,5 +7,6 @@ image-compression=auto_glz,jpeg-wan-compression=auto,\
 zlib-glz-wan-compression=auto,\
 playback-compression=on,streaming-video=filter -vga \
 qxl -global qxl.ram_size=67108864 -global qxl.vram_size=18874368 \
--device qxl,id=video1,ram_size=67108864,vram_size=33554432,bus=pci.0,addr=0x4 \
+-global qxl.revision=4 \
+-device qxl,id=video1,ram_size=67108864,vram_size=33554432,revision=4,bus=pci.0,addr=0x4 \
 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-graphics-spice-compression.xml b/tests/qemuxml2argvdata/qemuxml2argv-graphics-spice-compression.xml
index a8c4ad8..2dc5776 100644
--- a/tests/qemuxml2argvdata/qemuxml2argv-graphics-spice-compression.xml
+++ b/tests/qemuxml2argvdata/qemuxml2argv-graphics-spice-compression.xml
@@ -31,10 +31,10 @@
       <streaming mode='filter'/>
     </graphics>
     <video>
-      <model type='qxl' ram='65536' vram='18432' heads='1'/>
+      <model type='qxl' ram='65536' vram='18432' heads='1' revision='4'/>
     </video>
     <video>
-      <model type='qxl' ram='65536' vram='32768' heads='1'/>
+      <model type='qxl' ram='65536' vram='32768' heads='1' revision='4'/>
     </video>
     <memballoon model='virtio'/>
   </devices>
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-graphics-spice-qxl-vga.args b/tests/qemuxml2argvdata/qemuxml2argv-graphics-spice-qxl-vga.args
index ef499e6..0b08038 100644
--- a/tests/qemuxml2argvdata/qemuxml2argv-graphics-spice-qxl-vga.args
+++ b/tests/qemuxml2argvdata/qemuxml2argv-graphics-spice-qxl-vga.args
@@ -4,5 +4,6 @@ unix:/tmp/test-monitor,server,nowait -no-acpi -boot c -usb -hda \
 /dev/HostVG/QEMUGuest1 -spice port=5903,tls-port=5904,addr=127.0.0.1,\
 x509-dir=/etc/pki/libvirt-spice,tls-channel=main,plaintext-channel=inputs -vga \
 qxl -global qxl-vga.ram_size=67108864 -global qxl-vga.vram_size=33554432 \
--device qxl,id=video1,ram_size=67108864,vram_size=67108864,bus=pci.0,addr=0x4 \
+-global qxl-vga.revision=4 \
+-device qxl,id=video1,ram_size=67108864,vram_size=67108864,revision=4,bus=pci.0,addr=0x4 \
 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-graphics-spice-qxl-vga.xml b/tests/qemuxml2argvdata/qemuxml2argv-graphics-spice-qxl-vga.xml
index 563d371..3cd0c42 100644
--- a/tests/qemuxml2argvdata/qemuxml2argv-graphics-spice-qxl-vga.xml
+++ b/tests/qemuxml2argvdata/qemuxml2argv-graphics-spice-qxl-vga.xml
@@ -28,10 +28,10 @@
       <channel name='inputs' mode='insecure'/>
     </graphics>
     <video>
-      <model type='qxl' ram='65536' vram='32768' heads='1'/>
+      <model type='qxl' ram='65536' vram='32768' heads='1' revision='4'/>
     </video>
     <video>
-      <model type='qxl' ram='65536' vram='65536' heads='1'/>
+      <model type='qxl' ram='65536' vram='65536' heads='1' revision='4'/>
     </video>
     <memballoon model='virtio'/>
   </devices>
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-graphics-spice.args b/tests/qemuxml2argvdata/qemuxml2argv-graphics-spice.args
index d7cfae0..082eaf7 100644
--- a/tests/qemuxml2argvdata/qemuxml2argv-graphics-spice.args
+++ b/tests/qemuxml2argvdata/qemuxml2argv-graphics-spice.args
@@ -6,5 +6,6 @@ x509-dir=/etc/pki/libvirt-spice,tls-channel=default,tls-channel=main,plaintext-c
 image-compression=auto_glz,jpeg-wan-compression=auto,zlib-glz-wan-compression=auto,\
 playback-compression=on,streaming-video=filter,disable-copy-paste -vga \
 qxl -global qxl.ram_size=67108864 -global qxl.vram_size=18874368 \
--device qxl,id=video1,ram_size=67108864,vram_size=33554432,bus=pci.0,addr=0x4 \
+-global qxl.revision=4 \
+-device qxl,id=video1,ram_size=67108864,vram_size=33554432,revision=4,bus=pci.0,addr=0x4 \
 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-graphics-spice.xml b/tests/qemuxml2argvdata/qemuxml2argv-graphics-spice.xml
index 9a36660..e99dbc8 100644
--- a/tests/qemuxml2argvdata/qemuxml2argv-graphics-spice.xml
+++ b/tests/qemuxml2argvdata/qemuxml2argv-graphics-spice.xml
@@ -34,10 +34,10 @@
       <clipboard copypaste='no'/>
     </graphics>
     <video>
-      <model type='qxl' ram='65536' vram='18432' heads='1'/>
+      <model type='qxl' ram='65536' vram='18432' heads='1' revision='4'/>
     </video>
     <video>
-      <model type='qxl' ram='65536' vram='32768' heads='1'/>
+      <model type='qxl' ram='65536' vram='32768' heads='1' revision='4'/>
     </video>
     <memballoon model='virtio'/>
   </devices>
-- 
1.8.1


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