[RFC v2 04/12] hw/core/machine: Split machine initialization around qemu_add_cli_devices_early()

[Zhao Liu <zhao1.liu@xxxxxxxxx>]

Split machine initialization and machine_run_board_init() into two parts
around qemu_add_cli_devices_early(), allowing initialization to continue
after the CPU creation from the CLI.

This enables machine to place the initialization steps with CPU
dependencies in post_init().

Signed-off-by: Zhao Liu <zhao1.liu@xxxxxxxxx>
---
 hw/core/machine.c   | 10 ++++++++++
 include/hw/boards.h |  2 ++
 system/vl.c         |  4 +++-
 3 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/hw/core/machine.c b/hw/core/machine.c
index 076bd365197b..7b4ac5ac52b2 100644
--- a/hw/core/machine.c
+++ b/hw/core/machine.c
@@ -1645,6 +1645,16 @@ void machine_run_board_init(MachineState *machine, const char *mem_path, Error *
 
     accel_init_interfaces(ACCEL_GET_CLASS(machine->accelerator));
     machine_class->init(machine);
+}
+
+void machine_run_board_post_init(MachineState *machine, Error **errp)
+{
+    MachineClass *machine_class = MACHINE_GET_CLASS(machine);
+
+    if (machine_class->post_init) {
+        machine_class->post_init(machine);
+    }
+
     phase_advance(PHASE_MACHINE_INITIALIZED);
 }
 
diff --git a/include/hw/boards.h b/include/hw/boards.h
index a49677466ef6..9f706223e848 100644
--- a/include/hw/boards.h
+++ b/include/hw/boards.h
@@ -33,6 +33,7 @@ const char *machine_class_default_cpu_type(MachineClass *mc);
 
 void machine_add_audiodev_property(MachineClass *mc);
 void machine_run_board_init(MachineState *machine, const char *mem_path, Error **errp);
+void machine_run_board_post_init(MachineState *machine, Error **errp);
 bool machine_usb(MachineState *machine);
 int machine_phandle_start(MachineState *machine);
 bool machine_dump_guest_core(MachineState *machine);
@@ -271,6 +272,7 @@ struct MachineClass {
     const char *deprecation_reason;
 
     void (*init)(MachineState *state);
+    void (*post_init)(MachineState *state);
     void (*reset)(MachineState *state, ShutdownCause reason);
     void (*wakeup)(MachineState *state);
     int (*kvm_type)(MachineState *machine, const char *arg);
diff --git a/system/vl.c b/system/vl.c
index 8540454aa1c2..00370f7a52aa 100644
--- a/system/vl.c
+++ b/system/vl.c
@@ -2659,12 +2659,14 @@ static void qemu_init_board(void)
     /* process plugin before CPUs are created, but once -smp has been parsed */
     qemu_plugin_load_list(&plugin_list, &error_fatal);
 
-    /* From here on we enter MACHINE_PHASE_INITIALIZED.  */
     machine_run_board_init(current_machine, mem_path, &error_fatal);
 
     /* Create CPU topology device if any. */
     qemu_add_cli_devices_early();
 
+    /* From here on we enter MACHINE_PHASE_INITIALIZED.  */
+    machine_run_board_post_init(current_machine, &error_fatal);
+
     drive_check_orphaned();
 
     realtime_init();
-- 
2.34.1