machine: Replace underscores in machine's property names

Replaced '_' with '-' to comply with QOM guidelines.
Made the conversion from command line to QMP in vl.c.

Signed-off-by: Marcel Apfelbaum <marcel.a@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>

hw/core/machine.c

diff --git a/hw/core/machine.c b/hw/core/machine.c
index cbba679..7a66c57 100644
--- a/hw/core/machine.c
+++ b/hw/core/machine.c
@@ -239,11 +239,11 @@
 {
     object_property_add_str(obj, "accel",
                             machine_get_accel, machine_set_accel, NULL);
-    object_property_add_bool(obj, "kernel_irqchip",
+    object_property_add_bool(obj, "kernel-irqchip",
                              machine_get_kernel_irqchip,
                              machine_set_kernel_irqchip,
                              NULL);
-    object_property_add(obj, "kvm_shadow_mem", "int",
+    object_property_add(obj, "kvm-shadow-mem", "int",
                         machine_get_kvm_shadow_mem,
                         machine_set_kvm_shadow_mem,
                         NULL, NULL, NULL);
@@ -257,11 +257,11 @@
                             machine_get_dtb, machine_set_dtb, NULL);
     object_property_add_str(obj, "dumpdtb",
                             machine_get_dumpdtb, machine_set_dumpdtb, NULL);
-    object_property_add(obj, "phandle_start", "int",
+    object_property_add(obj, "phandle-start", "int",
                         machine_get_phandle_start,
                         machine_set_phandle_start,
                         NULL, NULL, NULL);
-    object_property_add_str(obj, "dt_compatible",
+    object_property_add_str(obj, "dt-compatible",
                             machine_get_dt_compatible,
                             machine_set_dt_compatible,
                             NULL);

vl.c

diff --git a/vl.c b/vl.c
index 6abedcf..fe451aa 100644
--- a/vl.c
+++ b/vl.c
@@ -2823,15 +2823,25 @@
     Object *obj = OBJECT(opaque);
     StringInputVisitor *siv;
     Error *local_err = NULL;
+    char *c, *qom_name;
 
     if (strcmp(name, "qom-type") == 0 || strcmp(name, "id") == 0 ||
         strcmp(name, "type") == 0) {
         return 0;
     }
 
+    qom_name = g_strdup(name);
+    c = qom_name;
+    while (*c++) {
+        if (*c == '_') {
+            *c = '-';
+        }
+    }
+
     siv = string_input_visitor_new(value);
-    object_property_set(obj, string_input_get_visitor(siv), name, &local_err);
+    object_property_set(obj, string_input_get_visitor(siv), qom_name, &local_err);
     string_input_visitor_cleanup(siv);
+    g_free(qom_name);
 
     if (local_err) {
         qerror_report_err(local_err);