hw/core/cpu-common: Convert TYPE_CPU class to 3-phase reset

Convert the parent class TYPE_CPU to 3-phase reset. This
is a necessary prerequisite to converting the subclasses.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20221124115023.2437291-2-peter.maydell@linaro.org

hw/core/cpu-common.c

@@ -116,9 +116,9 @@ void cpu_reset(CPUState *cpu)
     trace_guest_cpu_reset(cpu);
 }
 
-static void cpu_common_reset(DeviceState *dev)
+static void cpu_common_reset_hold(Object *obj)
 {
-    CPUState *cpu = CPU(dev);
+    CPUState *cpu = CPU(obj);
     CPUClass *cc = CPU_GET_CLASS(cpu);
 
     if (qemu_loglevel_mask(CPU_LOG_RESET)) {
@@ -259,6 +259,7 @@ static int64_t cpu_common_get_arch_id(CPUState *cpu)
 static void cpu_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
+    ResettableClass *rc = RESETTABLE_CLASS(klass);
     CPUClass *k = CPU_CLASS(klass);
 
     k->parse_features = cpu_common_parse_features;
@@ -269,7 +270,7 @@ static void cpu_class_init(ObjectClass *klass, void *data)
     set_bit(DEVICE_CATEGORY_CPU, dc->categories);
     dc->realize = cpu_common_realizefn;
     dc->unrealize = cpu_common_unrealizefn;
-    dc->reset = cpu_common_reset;
+    rc->phases.hold = cpu_common_reset_hold;
     cpu_class_init_props(dc);
     /*
      * Reason: CPUs still need special care by board code: wiring up