cpus: Build cpu_exec_[un]realizefn() methods once

Now that cpu_exec_realizefn() and cpu_exec_unrealizefn()
methods don't use any target specific definition anymore,
we can move them to cpu-common.c to be able to build them
once.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20250123234415.59850-21-philmd@linaro.org>

1 files changed, 26 insertions, 0 deletions

diff --git a/hw/core/cpu-common.c b/hw/core/cpu-common.c
index d5cd227fe6..5671d8d4f5 100644
--- a/hw/core/cpu-common.c
+++ b/hw/core/cpu-common.c
@@ -193,6 +193,20 @@ static void cpu_common_parse_features(const char *typename, char *features,
     }
 }
 
+bool cpu_exec_realizefn(CPUState *cpu, Error **errp)
+{
+    if (!accel_cpu_common_realize(cpu, errp)) {
+        return false;
+    }
+
+    /* Wait until cpu initialization complete before exposing cpu. */
+    cpu_list_add(cpu);
+
+    cpu_vmstate_register(cpu);
+
+    return true;
+}
+
 static void cpu_common_realizefn(DeviceState *dev, Error **errp)
 {
     CPUState *cpu = CPU(dev);
@@ -234,6 +248,18 @@ static void cpu_common_unrealizefn(DeviceState *dev)
     cpu_exec_unrealizefn(cpu);
 }
 
+void cpu_exec_unrealizefn(CPUState *cpu)
+{
+    cpu_vmstate_unregister(cpu);
+
+    cpu_list_remove(cpu);
+    /*
+     * Now that the vCPU has been removed from the RCU list, we can call
+     * accel_cpu_common_unrealize, which may free fields using call_rcu.
+     */
+    accel_cpu_common_unrealize(cpu);
+}
+
 static void cpu_common_initfn(Object *obj)
 {
     CPUState *cpu = CPU(obj);