diff --git a/hw/xen/xen-hvm-common.c b/hw/xen/xen-hvm-common.c
index 05a29c6..baa1adb 100644
--- a/hw/xen/xen-hvm-common.c
+++ b/hw/xen/xen-hvm-common.c
@@ -20,8 +20,8 @@
 
     if (runstate_check(RUN_STATE_INMIGRATE)) {
         /* RAM already populated in Xen */
-        fprintf(stderr, "%s: do not alloc "RAM_ADDR_FMT
-                " bytes of ram at "RAM_ADDR_FMT" when runstate is INMIGRATE\n",
+        warn_report("%s: do not alloc "RAM_ADDR_FMT
+                " bytes of ram at "RAM_ADDR_FMT" when runstate is INMIGRATE",
                 __func__, size, ram_addr);
         return;
     }
@@ -552,9 +552,9 @@
         req->data = copy.data;
 
         if (req->state != STATE_IOREQ_INPROCESS) {
-            fprintf(stderr, "Badness in I/O request ... not in service?!: "
+            warn_report("Badness in I/O request ... not in service?!: "
                     "%x, ptr: %x, port: %"PRIx64", "
-                    "data: %"PRIx64", count: %u, size: %u, type: %u\n",
+                    "data: %"PRIx64", count: %u, size: %u, type: %u",
                     req->state, req->data_is_ptr, req->addr,
                     req->data, req->count, req->size, req->type);
             destroy_hvm_domain(false);
@@ -758,9 +758,9 @@
     va_list ap;
 
     va_start(ap, fmt);
-    vfprintf(stderr, fmt, ap);
+    error_vreport(fmt, ap);
     va_end(ap);
-    fprintf(stderr, "Will destroy the domain.\n");
+    error_report("Will destroy the domain.");
     /* destroy the domain */
     qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_ERROR);
 }
diff --git a/hw/xen/xen-mapcache.c b/hw/xen/xen-mapcache.c
index 336c212..4f956d0 100644
--- a/hw/xen/xen-mapcache.c
+++ b/hw/xen/xen-mapcache.c
@@ -347,9 +347,8 @@
         MapCacheRev *reventry = g_new0(MapCacheRev, 1);
         entry->lock++;
         if (entry->lock == 0) {
-            fprintf(stderr,
-                    "mapcache entry lock overflow: "HWADDR_FMT_plx" -> %p\n",
-                    entry->paddr_index, entry->vaddr_base);
+            error_report("mapcache entry lock overflow: "HWADDR_FMT_plx" -> %p",
+                         entry->paddr_index, entry->vaddr_base);
             abort();
         }
         reventry->dma = dma;