[PATCH 4/7] machine: machine_find_class() function

[Eduardo Habkost]

Move find_machine() from vl.c to core/machine.c and rename it to
machine_find_class(), so it can be reused by other code.

The function won't reuse the results of the previous
object_class_get_list() call like it did in vl.c, but this
shouldn't be a problem because the function is expected to be
called only once during regular QEMU usage.

Signed-off-by: Eduardo Habkost <ehabk...@redhat.com>
---
 include/hw/boards.h |  1 +
 hw/core/machine.c   | 16 ++++++++++++++++
 vl.c                | 17 +----------------
 3 files changed, 18 insertions(+), 16 deletions(-)

diff --git a/include/hw/boards.h b/include/hw/boards.h
index de45087f34..0ab7138c63 100644
--- a/include/hw/boards.h
+++ b/include/hw/boards.h
@@ -76,6 +76,7 @@ void machine_set_cpu_numa_node(MachineState *machine,
                                Error **errp);
 
 void machine_class_allow_dynamic_sysbus_dev(MachineClass *mc, const char 
*type);
+MachineClass *machine_find_class(const char *name);
 
 
 /**
diff --git a/hw/core/machine.c b/hw/core/machine.c
index 1689ad3bf8..53dae1cd08 100644
--- a/hw/core/machine.c
+++ b/hw/core/machine.c
@@ -1143,6 +1143,22 @@ void machine_run_board_init(MachineState *machine)
     machine_class->init(machine);
 }
 
+MachineClass *machine_find_class(const char *name)
+{
+    g_autoptr(GSList) machines = object_class_get_list(TYPE_MACHINE, false);
+    GSList *el;
+
+    for (el = machines; el; el = el->next) {
+        MachineClass *mc = el->data;
+
+        if (!strcmp(mc->name, name) || !g_strcmp0(mc->alias, name)) {
+            return mc;
+        }
+    }
+
+    return NULL;
+}
+
 static const TypeInfo machine_info = {
     .name = TYPE_MACHINE,
     .parent = TYPE_OBJECT,
diff --git a/vl.c b/vl.c
index 4489cfb2bb..8901455ee7 100644
--- a/vl.c
+++ b/vl.c
@@ -1306,21 +1306,6 @@ static int usb_parse(const char *cmdline)
 
 MachineState *current_machine;
 
-static MachineClass *find_machine(const char *name, GSList *machines)
-{
-    GSList *el;
-
-    for (el = machines; el; el = el->next) {
-        MachineClass *mc = el->data;
-
-        if (!strcmp(mc->name, name) || !g_strcmp0(mc->alias, name)) {
-            return mc;
-        }
-    }
-
-    return NULL;
-}
-
 static MachineClass *find_default_machine(GSList *machines)
 {
     GSList *el;
@@ -2485,7 +2470,7 @@ static MachineClass *machine_parse(const char *name, 
GSList *machines)
         exit(0);
     }
 
-    mc = find_machine(name, machines);
+    mc = machine_find_class(name);
     if (!mc) {
         error_report("unsupported machine type");
         error_printf("Use -machine help to list supported machines\n");
-- 
2.21.0