target-xtensa: Mark as unmigratable

There was no CPU_SAVE_VERSION defined, so neither "cpu_common" VMState
nor cpu_{save,load}() were registered. Their implementation was no-op.
Therefore there is no backwards compatibility to keep, so mark XtensaCPU
as unmigratable at device level.
Signed-off-by: NAndreas Färber <afaerber@suse.de>
Reviewed-by: NJuan Quintela <quintela@redhat.com>

target-xtensa/Makefile.objs

@@ -3,4 +3,3 @@ obj-y += core-dc232b.o
 obj-y += core-dc233c.o
 obj-y += core-fsf.o
 obj-y += translate.o op_helper.o helper.o cpu.o
-obj-$(CONFIG_SOFTMMU) += machine.o

target-xtensa/cpu.c

@@ -30,6 +30,7 @@
 
 #include "cpu.h"
 #include "qemu-common.h"
+#include "migration/vmstate.h"
 
 
 /* CPUClass::reset() */
@@ -64,13 +65,21 @@ static void xtensa_cpu_initfn(Object *obj)
     cpu_exec_init(env);
 }
 
+static const VMStateDescription vmstate_xtensa_cpu = {
+    .name = "cpu",
+    .unmigratable = 1,
+};
+
 static void xtensa_cpu_class_init(ObjectClass *oc, void *data)
 {
+    DeviceClass *dc = DEVICE_CLASS(oc);
     CPUClass *cc = CPU_CLASS(oc);
     XtensaCPUClass *xcc = XTENSA_CPU_CLASS(cc);
 
     xcc->parent_reset = cc->reset;
     cc->reset = xtensa_cpu_reset;
+
+    dc->vmsd = &vmstate_xtensa_cpu;
 }
 
 static const TypeInfo xtensa_cpu_type_info = {

target-xtensa/machine.c

-/*
- * Copyright (c) 2011, Max Filippov, Open Source and Linux Lab.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *     * Redistributions of source code must retain the above copyright
- *       notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above copyright
- *       notice, this list of conditions and the following disclaimer in the
- *       documentation and/or other materials provided with the distribution.
- *     * Neither the name of the Open Source and Linux Lab nor the
- *       names of its contributors may be used to endorse or promote products
- *       derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
- * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include "hw/hw.h"
-#include "hw/boards.h"
-
-void cpu_save(QEMUFile *f, void *opaque)
-{
-}
-
-int cpu_load(QEMUFile *f, void *opaque, int version_id)
-{
-    return 0;
-}