From 458fb6792d834474c6b289738b6bf9601fad87ab Mon Sep 17 00:00:00 2001
From: Gerd Hoffmann <kraxel@redhat.com>
Date: Tue, 8 Dec 2009 13:11:33 +0100
Subject: [PATCH] qdev: make compat stuff more generic

This patch renames the compat properties into global properties and
makes them more generic.  The compatibility stuff is only one of
multiple possible users now.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
---
 hw/boards.h          |  2 +-
 hw/pc.c              |  2 +-
 hw/qdev-properties.c | 22 ++++++++++++++--------
 hw/qdev.c            |  2 +-
 hw/qdev.h            | 10 ++++++----
 vl.c                 |  2 +-
 6 files changed, 24 insertions(+), 16 deletions(-)

diff --git a/hw/boards.h b/hw/boards.h
index d8893413d42..7a0f20f63b3 100644
--- a/hw/boards.h
+++ b/hw/boards.h
@@ -20,7 +20,7 @@ typedef struct QEMUMachine {
     int use_scsi;
     int max_cpus;
     int is_default;
-    CompatProperty *compat_props;
+    GlobalProperty *compat_props;
     struct QEMUMachine *next;
 } QEMUMachine;
 
diff --git a/hw/pc.c b/hw/pc.c
index 8c1b7ea5758..147a9a70220 100644
--- a/hw/pc.c
+++ b/hw/pc.c
@@ -1298,7 +1298,7 @@ static QEMUMachine pc_machine_v0_10 = {
     .desc = "Standard PC, qemu 0.10",
     .init = pc_init_pci,
     .max_cpus = 255,
-    .compat_props = (CompatProperty[]) {
+    .compat_props = (GlobalProperty[]) {
         {
             .driver   = "virtio-blk-pci",
             .property = "class",
diff --git a/hw/qdev-properties.c b/hw/qdev-properties.c
index bda66993831..fe106bd6a66 100644
--- a/hw/qdev-properties.c
+++ b/hw/qdev-properties.c
@@ -593,21 +593,27 @@ void qdev_prop_set_defaults(DeviceState *dev, Property *props)
     }
 }
 
-static CompatProperty *compat_props;
+static QTAILQ_HEAD(, GlobalProperty) global_props = QTAILQ_HEAD_INITIALIZER(global_props);
 
-void qdev_prop_register_compat(CompatProperty *props)
+void qdev_prop_register_global(GlobalProperty *prop)
 {
-    compat_props = props;
+    QTAILQ_INSERT_TAIL(&global_props, prop, next);
 }
 
-void qdev_prop_set_compat(DeviceState *dev)
+void qdev_prop_register_global_list(GlobalProperty *props)
 {
-    CompatProperty *prop;
+    int i;
 
-    if (!compat_props) {
-        return;
+    for (i = 0; props[i].driver != NULL; i++) {
+        qdev_prop_register_global(props+i);
     }
-    for (prop = compat_props; prop->driver != NULL; prop++) {
+}
+
+void qdev_prop_set_globals(DeviceState *dev)
+{
+    GlobalProperty *prop;
+
+    QTAILQ_FOREACH(prop, &global_props, next) {
         if (strcmp(dev->info->name, prop->driver) != 0) {
             continue;
         }
diff --git a/hw/qdev.c b/hw/qdev.c
index 13c9fe236ad..b6bd4aeabd5 100644
--- a/hw/qdev.c
+++ b/hw/qdev.c
@@ -103,7 +103,7 @@ DeviceState *qdev_create(BusState *bus, const char *name)
     dev->parent_bus = bus;
     qdev_prop_set_defaults(dev, dev->info->props);
     qdev_prop_set_defaults(dev, dev->parent_bus->info->props);
-    qdev_prop_set_compat(dev);
+    qdev_prop_set_globals(dev);
     QLIST_INSERT_HEAD(&bus->children, dev, sibling);
     if (qdev_hotplug) {
         assert(bus->allow_hotplug);
diff --git a/hw/qdev.h b/hw/qdev.h
index 8d53754d48c..bbcdba185a7 100644
--- a/hw/qdev.h
+++ b/hw/qdev.h
@@ -92,11 +92,12 @@ struct PropertyInfo {
     int (*print)(DeviceState *dev, Property *prop, char *dest, size_t len);
 };
 
-struct CompatProperty {
+typedef struct GlobalProperty {
     const char *driver;
     const char *property;
     const char *value;
-};
+    QTAILQ_ENTRY(GlobalProperty) next;
+} GlobalProperty;
 
 /*** Board API.  This should go away once we have a machine config file.  ***/
 
@@ -256,8 +257,9 @@ void qdev_prop_set_macaddr(DeviceState *dev, const char *name, uint8_t *value);
 void qdev_prop_set_ptr(DeviceState *dev, const char *name, void *value);
 void qdev_prop_set_defaults(DeviceState *dev, Property *props);
 
-void qdev_prop_register_compat(CompatProperty *props);
-void qdev_prop_set_compat(DeviceState *dev);
+void qdev_prop_register_global(GlobalProperty *prop);
+void qdev_prop_register_global_list(GlobalProperty *props);
+void qdev_prop_set_globals(DeviceState *dev);
 
 /* This is a nasty hack to allow passing a NULL bus to qdev_create.  */
 extern struct BusInfo system_bus_info;
diff --git a/vl.c b/vl.c
index 09a0ec5cb1c..a242a11c44e 100644
--- a/vl.c
+++ b/vl.c
@@ -5779,7 +5779,7 @@ int main(int argc, char **argv, char **envp)
     }
 
     if (machine->compat_props) {
-        qdev_prop_register_compat(machine->compat_props);
+        qdev_prop_register_global_list(machine->compat_props);
     }
     machine->init(ram_size, boot_devices,
                   kernel_filename, kernel_cmdline, initrd_filename, cpu_model);
-- 
2.39.5