qdev: set properties with device_class_set_props()

[qemu.git] / hw / acpi / vmgenid.c

diff --git a/hw/acpi/vmgenid.c b/hw/acpi/vmgenid.c
index c8465df790dd2540d44ee8a4e22f42e7cadb25fe..2df7623d74d96e1e33d6d36a33d05f42d775337c 100644 (file)
--- a/hw/acpi/vmgenid.c
+++ b/hw/acpi/vmgenid.c
@@ -11,12 +11,16 @@
  */
 
 #include "qemu/osdep.h"
-#include "qmp-commands.h"
+#include "qapi/error.h"
+#include "qapi/qapi-commands-misc.h"
+#include "qemu/module.h"
 #include "hw/acpi/acpi.h"
 #include "hw/acpi/aml-build.h"
 #include "hw/acpi/vmgenid.h"
 #include "hw/nvram/fw_cfg.h"
-#include "sysemu/sysemu.h"
+#include "hw/qdev-properties.h"
+#include "migration/vmstate.h"
+#include "sysemu/reset.h"
 
 void vmgenid_build_acpi(VmGenIdState *vms, GArray *table_data, GArray *guid,
                         BIOSLinker *linker)
@@ -29,8 +33,7 @@ void vmgenid_build_acpi(VmGenIdState *vms, GArray *table_data, GArray *guid,
      * first, since that's what the guest expects
      */
     g_array_set_size(guid, VMGENID_FW_CFG_SIZE - ARRAY_SIZE(guid_le.data));
-    guid_le = vms->guid;
-    qemu_uuid_bswap(&guid_le);
+    guid_le = qemu_uuid_bswap(vms->guid);
     /* The GUID is written at a fixed offset into the fw_cfg file
      * in order to implement the "OVMF SDT Header probe suppressor"
      * see docs/specs/vmgenid.txt for more details
@@ -124,7 +127,7 @@ void vmgenid_add_fw_cfg(VmGenIdState *vms, FWCfgState *s, GArray *guid)
     fw_cfg_add_file(s, VMGENID_GUID_FW_CFG_FILE, guid->data,
                     VMGENID_FW_CFG_SIZE);
     /* Create a read-write fw_cfg file for Address */
-    fw_cfg_add_file_callback(s, VMGENID_ADDR_FW_CFG_FILE, NULL, NULL,
+    fw_cfg_add_file_callback(s, VMGENID_ADDR_FW_CFG_FILE, NULL, NULL, NULL,
                              vms->vmgenid_addr_le,
                              ARRAY_SIZE(vms->vmgenid_addr_le), false);
 }
@@ -148,8 +151,7 @@ static void vmgenid_update_guest(VmGenIdState *vms)
              * however, will expect the fields to be little-endian.
              * Perform a byte swap immediately before writing.
              */
-            guid_le = vms->guid;
-            qemu_uuid_bswap(&guid_le);
+            guid_le = qemu_uuid_bswap(vms->guid);
             /* The GUID is written at a fixed offset into the fw_cfg file
              * in order to implement the "OVMF SDT Header probe suppressor"
              * see docs/specs/vmgenid.txt for more details.
@@ -162,21 +164,6 @@ static void vmgenid_update_guest(VmGenIdState *vms)
     }
 }
 
-static void vmgenid_set_guid(Object *obj, const char *value, Error **errp)
-{
-    VmGenIdState *vms = VMGENID(obj);
-
-    if (!strcmp(value, "auto")) {
-        qemu_uuid_generate(&vms->guid);
-    } else if (qemu_uuid_parse(value, &vms->guid) < 0) {
-        error_setg(errp, "'%s. %s': Failed to parse GUID string: %s",
-                   object_get_typename(OBJECT(vms)), VMGENID_GUID, value);
-        return;
-    }
-
-    vmgenid_update_guest(vms);
-}
-
 /* After restoring an image, we need to update the guest memory and notify
  * it of a potential change to VM Generation ID
  */
@@ -208,23 +195,40 @@ static void vmgenid_handle_reset(void *opaque)
 static void vmgenid_realize(DeviceState *dev, Error **errp)
 {
     VmGenIdState *vms = VMGENID(dev);
+
+    if (!bios_linker_loader_can_write_pointer()) {
+        error_setg(errp, "%s requires DMA write support in fw_cfg, "
+                   "which this machine type does not provide", VMGENID_DEVICE);
+        return;
+    }
+
+    /* Given that this function is executing, there is at least one VMGENID
+     * device. Check if there are several.
+     */
+    if (!find_vmgenid_dev()) {
+        error_setg(errp, "at most one %s device is permitted", VMGENID_DEVICE);
+        return;
+    }
+
     qemu_register_reset(vmgenid_handle_reset, vms);
+
+    vmgenid_update_guest(vms);
 }
 
+static Property vmgenid_device_properties[] = {
+    DEFINE_PROP_UUID(VMGENID_GUID, VmGenIdState, guid),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
 static void vmgenid_device_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
     dc->vmsd = &vmstate_vmgenid;
     dc->realize = vmgenid_realize;
+    device_class_set_props(dc, vmgenid_device_properties);
     dc->hotpluggable = false;
-
-    object_class_property_add_str(klass, VMGENID_GUID, NULL,
-                                  vmgenid_set_guid, NULL);
-    object_class_property_set_description(klass, VMGENID_GUID,
-                                    "Set Global Unique Identifier "
-                                    "(big-endian) or auto for random value",
-                                    NULL);
+    set_bit(DEVICE_CATEGORY_MISC, dc->categories);
 }
 
 static const TypeInfo vmgenid_device_info = {
@@ -240,3 +244,20 @@ static void vmgenid_register_types(void)
 }
 
 type_init(vmgenid_register_types)
+
+GuidInfo *qmp_query_vm_generation_id(Error **errp)
+{
+    GuidInfo *info;
+    VmGenIdState *vms;
+    Object *obj = find_vmgenid_dev();
+
+    if (!obj) {
+        error_setg(errp, "VM Generation ID device not found");
+        return NULL;
+    }
+    vms = VMGENID(obj);
+
+    info = g_malloc0(sizeof(*info));
+    info->guid = qemu_uuid_unparse_strdup(&vms->guid);
+    return info;
+}