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-rw-r--r--hw/core/machine.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/hw/core/machine.c b/hw/core/machine.c
index 7a0b263cda..57463ad77a 100644
--- a/hw/core/machine.c
+++ b/hw/core/machine.c
@@ -853,8 +853,12 @@ static void machine_class_init(ObjectClass *oc, void *data)
 
 static void machine_class_base_init(ObjectClass *oc, void *data)
 {
+    MachineClass *mc = MACHINE_CLASS(oc);
+    mc->max_cpus = mc->max_cpus ?: 1;
+    mc->min_cpus = mc->min_cpus ?: 1;
+    mc->default_cpus = mc->default_cpus ?: 1;
+
     if (!object_class_is_abstract(oc)) {
-        MachineClass *mc = MACHINE_CLASS(oc);
         const char *cname = object_class_get_name(oc);
         assert(g_str_has_suffix(cname, TYPE_MACHINE_SUFFIX));
         mc->name = g_strndup(cname,