target-unicore32: Mark as unmigratable

CPU_SAVE_VERSION 2 was bogus as both save and load would just throw a
hw_error(). Therefore we can without problems suppress registration of
"cpu_common" VMState by dropping CPU_SAVE_VERSION define and provide an
unmigratable "cpu" VMStateDescription for UniCore32CPU at device level
instead, where we can attach this the QOM way.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Reviewed-by: Juan Quintela <quintela@redhat.com>

target-unicore32/Makefile.objs

@@ -1,4 +1,4 @@
 obj-y += translate.o op_helper.o helper.o cpu.o
 obj-y += ucf64_helper.o
 
-obj-$(CONFIG_SOFTMMU) += machine.o softmmu.o
+obj-$(CONFIG_SOFTMMU) += softmmu.o

target-unicore32/cpu.c

@@ -14,6 +14,7 @@
 
 #include "cpu.h"
 #include "qemu-common.h"
+#include "migration/vmstate.h"
 
 static inline void set_feature(CPUUniCore32State *env, int feature)
 {
@@ -96,11 +97,18 @@ static void uc32_cpu_initfn(Object *obj)
     tlb_flush(env, 1);
 }
 
+static const VMStateDescription vmstate_uc32_cpu = {
+    .name = "cpu",
+    .unmigratable = 1,
+};
+
 static void uc32_cpu_class_init(ObjectClass *oc, void *data)
 {
+    DeviceClass *dc = DEVICE_CLASS(oc);
     CPUClass *cc = CPU_CLASS(oc);
 
     cc->class_by_name = uc32_cpu_class_by_name;
+    dc->vmsd = &vmstate_uc32_cpu;
 }
 
 static void uc32_register_cpu_type(const UniCore32CPUInfo *info)

target-unicore32/cpu.h

@@ -133,8 +133,6 @@ int uc32_cpu_signal_handler(int host_signum, void *pinfo, void *puc);
 int uc32_cpu_handle_mmu_fault(CPUUniCore32State *env, target_ulong address, int rw,
                               int mmu_idx);
 
-#define CPU_SAVE_VERSION 2
-
 /* MMU modes definitions */
 #define MMU_MODE0_SUFFIX _kernel
 #define MMU_MODE1_SUFFIX _user

target-unicore32/machine.c

@@ -1,23 +0,0 @@
-/*
- * Generic machine functions for UniCore32 ISA
- *
- * Copyright (C) 2010-2012 Guan Xuetao
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation, or any later version.
- * See the COPYING file in the top-level directory.
- */
-#include "hw/hw.h"
-
-void cpu_save(QEMUFile *f, void *opaque)
-{
-    hw_error("%s not supported yet.\n", __func__);
-}
-
-int cpu_load(QEMUFile *f, void *opaque, int version_id)
-{
-    hw_error("%s not supported yet.\n", __func__);
-
-    return 0;
-}