1 files changed, 38 insertions, 19 deletions

diff --git a/hw/xen/xen-hvm-common.c b/hw/xen/xen-hvm-common.c
index a31b067404..cb82f4b83d 100644
--- a/hw/xen/xen-hvm-common.c
+++ b/hw/xen/xen-hvm-common.c
@@ -764,27 +764,12 @@ void xen_shutdown_fatal_error(const char *fmt, ...)
     qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_ERROR);
 }
 
-void xen_register_ioreq(XenIOState *state, unsigned int max_cpus,
-                        MemoryListener xen_memory_listener)
+static void xen_do_ioreq_register(XenIOState *state,
+                                           unsigned int max_cpus,
+                                           MemoryListener xen_memory_listener)
 {
     int i, rc;
 
-    setup_xen_backend_ops();
-
-    state->xce_handle = qemu_xen_evtchn_open();
-    if (state->xce_handle == NULL) {
-        perror("xen: event channel open");
-        goto err;
-    }
-
-    state->xenstore = xs_daemon_open();
-    if (state->xenstore == NULL) {
-        perror("xen: xenstore open");
-        goto err;
-    }
-
-    xen_create_ioreq_server(xen_domid, &state->ioservid);
-
     state->exit.notify = xen_exit_notifier;
     qemu_add_exit_notifier(&state->exit);
 
@@ -849,12 +834,46 @@ void xen_register_ioreq(XenIOState *state, unsigned int max_cpus,
     QLIST_INIT(&state->dev_list);
     device_listener_register(&state->device_listener);
 
+    return;
+
+err:
+    error_report("xen hardware virtual machine initialisation failed");
+    exit(1);
+}
+
+void xen_register_ioreq(XenIOState *state, unsigned int max_cpus,
+                        MemoryListener xen_memory_listener)
+{
+    int rc;
+
+    setup_xen_backend_ops();
+
+    state->xce_handle = qemu_xen_evtchn_open();
+    if (state->xce_handle == NULL) {
+        perror("xen: event channel open");
+        goto err;
+    }
+
+    state->xenstore = xs_daemon_open();
+    if (state->xenstore == NULL) {
+        perror("xen: xenstore open");
+        goto err;
+    }
+
+    rc = xen_create_ioreq_server(xen_domid, &state->ioservid);
+    if (!rc) {
+        xen_do_ioreq_register(state, max_cpus, xen_memory_listener);
+    } else {
+        warn_report("xen: failed to create ioreq server");
+    }
+
     xen_bus_init();
 
     xen_be_init();
 
     return;
+
 err:
-    error_report("xen hardware virtual machine initialisation failed");
+    error_report("xen hardware virtual machine backend registration failed");
     exit(1);
 }