target-arm: Implement qmp query-cpu-definitions

Libvirt uses this to introspect available CPU models.

Signed-off-by: Cole Robinson <crobinso@redhat.com>
Reviewed-by: Andreas Färber <afaerber@suse.de>
Message-id: c0bdcd6c7ea6a085a6902ccaa73180fd771c8267.1378303555.git.crobinso@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

target-arm/helper.c

@@ -2,6 +2,7 @@
 #include "exec/gdbstub.h"
 #include "helper.h"
 #include "qemu/host-utils.h"
+#include "sysemu/arch_init.h"
 #include "sysemu/sysemu.h"
 #include "qemu/bitops.h"
 
@@ -1829,6 +1830,37 @@ void arm_cpu_list(FILE *f, fprintf_function cpu_fprintf)
     g_slist_free(list);
 }
 
+static void arm_cpu_add_definition(gpointer data, gpointer user_data)
+{
+    ObjectClass *oc = data;
+    CpuDefinitionInfoList **cpu_list = user_data;
+    CpuDefinitionInfoList *entry;
+    CpuDefinitionInfo *info;
+    const char *typename;
+
+    typename = object_class_get_name(oc);
+    info = g_malloc0(sizeof(*info));
+    info->name = g_strndup(typename,
+                           strlen(typename) - strlen("-" TYPE_ARM_CPU));
+
+    entry = g_malloc0(sizeof(*entry));
+    entry->value = info;
+    entry->next = *cpu_list;
+    *cpu_list = entry;
+}
+
+CpuDefinitionInfoList *arch_query_cpu_definitions(Error **errp)
+{
+    CpuDefinitionInfoList *cpu_list = NULL;
+    GSList *list;
+
+    list = object_class_get_list(TYPE_ARM_CPU, false);
+    g_slist_foreach(list, arm_cpu_add_definition, &cpu_list);
+    g_slist_free(list);
+
+    return cpu_list;
+}
+
 void define_one_arm_cp_reg_with_opaque(ARMCPU *cpu,
                                        const ARMCPRegInfo *r, void *opaque)
 {