qemu: skip QMP probing of CPU definitions when missing

This unbreaks emulators that don't support this command such as
qemu-system-mips*.

Reference: http://bugs.debian.org/854125

src/qemu/qemu_capabilities.c

@@ -361,6 +361,8 @@ VIR_ENUM_IMPL(virQEMUCaps, QEMU_CAPS_LAST,
               "spice-rendernode",
               "nvdimm",
               "pcie-root-port",
+
+              "query-cpu-definitions", /* 250 */
     );
 
 
@@ -1518,6 +1520,7 @@ struct virQEMUCapsStringFlags virQEMUCapsCommands[] = {
     { "query-hotpluggable-cpus", QEMU_CAPS_QUERY_HOTPLUGGABLE_CPUS },
     { "query-qmp-schema", QEMU_CAPS_QUERY_QMP_SCHEMA },
     { "query-cpu-model-expansion", QEMU_CAPS_QUERY_CPU_MODEL_EXPANSION},
+    { "query-cpu-definitions", QEMU_CAPS_QUERY_CPU_DEFINITIONS},
 };
 
 struct virQEMUCapsStringFlags virQEMUCapsMigration[] = {
@@ -2796,6 +2799,9 @@ virQEMUCapsProbeQMPCPUDefinitions(virQEMUCapsPtr qemuCaps,
     int ret = -1;
     size_t i;
 
+    if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_QUERY_CPU_DEFINITIONS))
+        return 0;
+
     if ((ncpus = qemuMonitorGetCPUDefinitions(mon, &cpus)) < 0)
         return -1;
 

src/qemu/qemu_capabilities.h

@@ -397,6 +397,9 @@ typedef enum {
     QEMU_CAPS_DEVICE_NVDIMM, /* -device nvdimm */
     QEMU_CAPS_DEVICE_PCIE_ROOT_PORT, /* -device pcie-root-port */
 
+    /* 250 */
+    QEMU_CAPS_QUERY_CPU_DEFINITIONS, /* qmp query-cpu-definitions */
+
     QEMU_CAPS_LAST /* this must always be the last item */
 } virQEMUCapsFlags;
 

tests/qemucapabilitiesdata/caps_1.2.2.x86_64.xml

@@ -109,6 +109,7 @@
   <flag name='qxl.vram64_size_mb'/>
   <flag name='device-tray-moved-event'/>
   <flag name='display'/>
+  <flag name='query-cpu-definitions'/>
   <version>1002002</version>
   <kvmVersion>0</kvmVersion>
   <package></package>

tests/qemucapabilitiesdata/caps_1.3.1.x86_64.xml

@@ -127,6 +127,7 @@
   <flag name='device-tray-moved-event'/>
   <flag name='nec-usb-xhci-ports'/>
   <flag name='display'/>
+  <flag name='query-cpu-definitions'/>
   <version>1003001</version>
   <kvmVersion>0</kvmVersion>
   <package></package>

tests/qemucapabilitiesdata/caps_1.4.2.x86_64.xml

@@ -128,6 +128,7 @@
   <flag name='device-tray-moved-event'/>
   <flag name='nec-usb-xhci-ports'/>
   <flag name='display'/>
+  <flag name='query-cpu-definitions'/>
   <version>1004002</version>
   <kvmVersion>0</kvmVersion>
   <package></package>

tests/qemucapabilitiesdata/caps_1.5.3.x86_64.xml

@@ -139,6 +139,7 @@
   <flag name='nec-usb-xhci-ports'/>
   <flag name='display'/>
   <flag name='vhost-scsi'/>
+  <flag name='query-cpu-definitions'/>
   <version>1005003</version>
   <kvmVersion>0</kvmVersion>
   <package></package>

tests/qemucapabilitiesdata/caps_1.6.0.x86_64.xml

@@ -144,6 +144,7 @@
   <flag name='nec-usb-xhci-ports'/>
   <flag name='display'/>
   <flag name='vhost-scsi'/>
+  <flag name='query-cpu-definitions'/>
   <version>1006000</version>
   <kvmVersion>0</kvmVersion>
   <package></package>

tests/qemucapabilitiesdata/caps_1.7.0.x86_64.xml

@@ -146,6 +146,7 @@
   <flag name='nec-usb-xhci-ports'/>
   <flag name='display'/>
   <flag name='vhost-scsi'/>
+  <flag name='query-cpu-definitions'/>
   <version>1007000</version>
   <kvmVersion>0</kvmVersion>
   <package></package>

tests/qemucapabilitiesdata/caps_2.1.1.x86_64.xml

@@ -161,6 +161,7 @@
   <flag name='drive-detect-zeroes'/>
   <flag name='display'/>
   <flag name='vhost-scsi'/>
+  <flag name='query-cpu-definitions'/>
   <version>2001001</version>
   <kvmVersion>0</kvmVersion>
   <package></package>

tests/qemucapabilitiesdata/caps_2.4.0.x86_64.xml

@@ -182,6 +182,7 @@
   <flag name='virtio-vga'/>
   <flag name='vhost-scsi'/>
   <flag name='drive-iotune-group'/>
+  <flag name='query-cpu-definitions'/>
   <version>2004000</version>
   <kvmVersion>0</kvmVersion>
   <package></package>

tests/qemucapabilitiesdata/caps_2.5.0.x86_64.xml

@@ -188,6 +188,7 @@
   <flag name='query-qmp-schema'/>
   <flag name='vhost-scsi'/>
   <flag name='drive-iotune-group'/>
+  <flag name='query-cpu-definitions'/>
   <version>2005000</version>
   <kvmVersion>0</kvmVersion>
   <package></package>

tests/qemucapabilitiesdata/caps_2.6.0-gicv2.aarch64.xml

@@ -164,6 +164,7 @@
   <flag name='query-qmp-schema'/>
   <flag name='vhost-scsi'/>
   <flag name='drive-iotune-group'/>
+  <flag name='query-cpu-definitions'/>
   <version>2006000</version>
   <kvmVersion>0</kvmVersion>
   <package></package>

tests/qemucapabilitiesdata/caps_2.6.0-gicv3.aarch64.xml

@@ -164,6 +164,7 @@
   <flag name='query-qmp-schema'/>
   <flag name='vhost-scsi'/>
   <flag name='drive-iotune-group'/>
+  <flag name='query-cpu-definitions'/>
   <version>2006000</version>
   <kvmVersion>0</kvmVersion>
   <package></package>

tests/qemucapabilitiesdata/caps_2.6.0.ppc64le.xml

@@ -159,6 +159,7 @@
   <flag name='query-qmp-schema'/>
   <flag name='vhost-scsi'/>
   <flag name='drive-iotune-group'/>
+  <flag name='query-cpu-definitions'/>
   <version>2006000</version>
   <kvmVersion>0</kvmVersion>
   <package></package>

tests/qemucapabilitiesdata/caps_2.6.0.x86_64.xml

@@ -197,6 +197,7 @@
   <flag name='query-qmp-schema'/>
   <flag name='vhost-scsi'/>
   <flag name='drive-iotune-group'/>
+  <flag name='query-cpu-definitions'/>
   <version>2006000</version>
   <kvmVersion>0</kvmVersion>
   <package></package>

tests/qemucapabilitiesdata/caps_2.7.0.s390x.xml

@@ -127,6 +127,7 @@
   <flag name='gluster.debug_level'/>
   <flag name='vhost-scsi'/>
   <flag name='drive-iotune-group'/>
+  <flag name='query-cpu-definitions'/>
   <version>2007000</version>
   <kvmVersion>0</kvmVersion>
   <package></package>

tests/qemucapabilitiesdata/caps_2.7.0.x86_64.xml

@@ -199,6 +199,7 @@
   <flag name='gluster.debug_level'/>
   <flag name='vhost-scsi'/>
   <flag name='drive-iotune-group'/>
+  <flag name='query-cpu-definitions'/>
   <version>2007000</version>
   <kvmVersion>0</kvmVersion>
   <package> (v2.7.0)</package>

tests/qemucapabilitiesdata/caps_2.8.0.s390x.xml

@@ -129,6 +129,7 @@
   <flag name='vhost-scsi'/>
   <flag name='drive-iotune-group'/>
   <flag name='query-cpu-model-expansion'/>
+  <flag name='query-cpu-definitions'/>
   <version>2007093</version>
   <kvmVersion>0</kvmVersion>
   <package></package>

tests/qemucapabilitiesdata/caps_2.8.0.x86_64.xml

@@ -200,6 +200,7 @@
   <flag name='gluster.debug_level'/>
   <flag name='vhost-scsi'/>
   <flag name='drive-iotune-group'/>
+  <flag name='query-cpu-definitions'/>
   <version>2008000</version>
   <kvmVersion>0</kvmVersion>
   <package> (v2.8.0)</package>

tests/qemucapabilitiesdata/caps_2.9.0.x86_64.xml

@@ -203,6 +203,7 @@
   <flag name='query-cpu-model-expansion'/>
   <flag name='virtio-net.host_mtu'/>
   <flag name='pcie-root-port'/>
+  <flag name='query-cpu-definitions'/>
   <version>2008050</version>
   <kvmVersion>0</kvmVersion>
   <package> (v2.8.0-1961-g5b10b94bd5)</package>