qemu: capabilities: Add accessor to qemu caps machine types presence

Test code will need to know whether the virQEMUCaps object contains any
machine types already. Add a helper and expose it via 'qemu_capspriv.h'.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NMichal Privoznik <mprivozn@redhat.com>

src/qemu/qemu_capabilities.c

@@ -2641,6 +2641,22 @@ virQEMUCapsAddMachine(virQEMUCapsPtr qemuCaps,
     mach->qemuDefault = isDefault;
 }
 
+/**
+ * virQEMUCapsHasMachines:
+ * @qemuCaps: qemu capabilities object
+ *
+ * Returns true if @qemuCaps has at least one machine type defined. This is
+ * called by the test suite to figure out whether to populate fake machine types
+ * into the list.
+ */
+bool
+virQEMUCapsHasMachines(virQEMUCapsPtr qemuCaps)
+{
+
+    return !!qemuCaps->kvm.nmachineTypes || !!qemuCaps->tcg.nmachineTypes;
+}
+
+
 static int
 virQEMUCapsProbeQMPMachineTypes(virQEMUCapsPtr qemuCaps,
                                 virDomainVirtType virtType,

src/qemu/qemu_capspriv.h

@@ -108,6 +108,9 @@ virQEMUCapsSetMicrocodeVersion(virQEMUCapsPtr qemuCaps,
 void
 virQEMUCapsStripMachineAliases(virQEMUCapsPtr qemuCaps);
 
+bool
+virQEMUCapsHasMachines(virQEMUCapsPtr qemuCaps);
+
 void
 virQEMUCapsAddMachine(virQEMUCapsPtr qemuCaps,
                       virDomainVirtType virtType,