qom: add cpu_generic_init_unrealized()

cpu_generic_init() without realized=true.
Gives board code an opportunity to change
CPU properties.

Signed-off-by: Michael Davidsaver <mdavidsaver@gmail.com>

include/qom/cpu.h

@@ -550,6 +550,18 @@ ObjectClass *cpu_class_by_name(const char *typename, const char *cpu_model);
  */
 CPUState *cpu_generic_init(const char *typename, const char *cpu_model);
 
+/**
+ * cpu_generic_init_unrealized:
+ * @typename: The CPU base type.
+ * @cpu_model: The model string including optional parameters.
+ *
+ * Instantiates a CPU, processes optional parameters but does not realize it.
+ *
+ * Returns: A #CPUState or %NULL if an error occurred.
+ */
+CPUState *cpu_generic_init_unrealized(const char *typename,
+                                      const char *cpu_model);
+
 /**
  * cpu_has_work:
  * @cpu: The vCPU to check.

qom/cpu.c

@@ -42,6 +42,23 @@ bool cpu_exists(int64_t id)
 }
 
 CPUState *cpu_generic_init(const char *typename, const char *cpu_model)
+{
+    CPUState *cpu = cpu_generic_init_unrealized(typename, cpu_model);
+    if (cpu) {
+        Error *err = NULL;
+        object_property_set_bool(OBJECT(cpu), true, "realized", &err);
+
+        if (err != NULL) {
+            error_report_err(err);
+            object_unref(OBJECT(cpu));
+            return NULL;
+        }
+    }
+    return cpu;
+}
+
+CPUState *cpu_generic_init_unrealized(const char *typename,
+                                      const char *cpu_model)
 {
     char *str, *name, *featurestr;
     CPUState *cpu;
@@ -64,13 +81,7 @@ CPUState *cpu_generic_init(const char *typename, const char *cpu_model)
     featurestr = strtok(NULL, ",");
     cc->parse_features(cpu, featurestr, &err);
     g_free(str);
-    if (err != NULL) {
-        goto out;
-    }
-
-    object_property_set_bool(OBJECT(cpu), true, "realized", &err);
 
-out:
     if (err != NULL) {
         error_report_err(err);
         object_unref(OBJECT(cpu));