qdev: convert watchdogs

-watchdog NAME is now equivalent to -device NAME, except it treats
option argument '?' specially, and supports only one watchdog.

A side effect is that a device created with -watchdog may now receive
a different PCI address.

i6300esb is now available on any machine with a PCI bus, not just PCs.
ib700 is still PC only, but that could be changed easily.

The only remaining use of struct WatchdogTimerModel and
watchdog_add_model() is supporting '-watchdog ?'.  Should be replaced
by searching device_info_list for watchdog devices when we can
identify them there.

Also fixes ib700 not to use vm_clock before it is initialized: in
wdt_ib700_init(), called from register_watchdogs(), which runs before
init_timers().  The bug made ib700_write_enable_reg() crash in
qemu_del_timer().

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

1 files changed, 6 insertions, 20 deletions

diff --git a/hw/watchdog.c b/hw/watchdog.c
index 359c3185e3..adba872533 100644
--- a/hw/watchdog.c
+++ b/hw/watchdog.c
@@ -20,6 +20,8 @@
  */
 
 #include "qemu-common.h"
+#include "qemu-option.h"
+#include "qemu-config.h"
 #include "sys-queue.h"
 #include "sysemu.h"
 #include "hw/watchdog.h"
@@ -32,7 +34,6 @@
 #define WDT_DEBUG        5	/* Prints a message and continues running. */
 #define WDT_NONE         6	/* Do nothing. */
 
-static WatchdogTimerModel *watchdog;
 static int watchdog_action = WDT_RESET;
 static LIST_HEAD(watchdog_list, WatchdogTimerModel) watchdog_list;
 
@@ -49,12 +50,7 @@ void watchdog_add_model(WatchdogTimerModel *model)
 int select_watchdog(const char *p)
 {
     WatchdogTimerModel *model;
-
-    if (watchdog) {
-        fprintf(stderr,
-                 "qemu: only one watchdog option may be given\n");
-        return 1;
-    }
+    QemuOpts *opts;
 
     /* -watchdog ? lists available devices and exits cleanly. */
     if (strcmp(p, "?") == 0) {
@@ -67,7 +63,9 @@ int select_watchdog(const char *p)
 
     LIST_FOREACH(model, &watchdog_list, entry) {
         if (strcasecmp(model->wdt_name, p) == 0) {
-            watchdog = model;
+            /* add the device */
+            opts = qemu_opts_create(&qemu_device_opts, NULL, 0);
+            qemu_opt_set(opts, "driver", p);
             return 0;
         }
     }
@@ -130,15 +128,3 @@ void watchdog_perform_action(void)
         break;
     }
 }
-
-void watchdog_pc_init(PCIBus *pci_bus)
-{
-    if (watchdog)
-        watchdog->wdt_pc_init(pci_bus);
-}
-
-void register_watchdogs(void)
-{
-    wdt_ib700_init();
-    wdt_i6300esb_init();
-}