diff --git a/hw/misc/pvpanic.c b/hw/misc/pvpanic.c
index 01cfe0b0f5ba4dbfc1d33db52e18dac77c51b22a..a80fae5fb88098fb1fec08f9771b8953b9ddc93a 100644
--- a/hw/misc/pvpanic.c
+++ b/hw/misc/pvpanic.c
@@ -18,6 +18,8 @@
 #include "sysemu/sysemu.h"
 #include "qemu/log.h"
 
+#include "hw/nvram/fw_cfg.h"
+
 /* The bit of supported pv event */
 #define PVPANIC_F_PANICKED      0
 
@@ -86,10 +88,22 @@ static const MemoryRegionOps pvpanic_ops = {
 static int pvpanic_isa_initfn(ISADevice *dev)
 {
     PVPanicState *s = ISA_PVPANIC_DEVICE(dev);
+    static bool port_configured;
+    void *fw_cfg;
 
     memory_region_init_io(&s->io, &pvpanic_ops, s, "pvpanic", 1);
     isa_register_ioport(dev, &s->io, s->ioport);
 
+    if (!port_configured) {
+        fw_cfg = object_resolve_path("/machine/fw_cfg", NULL);
+        if (fw_cfg) {
+            fw_cfg_add_file(fw_cfg, "etc/pvpanic-port",
+                            g_memdup(&s->ioport, sizeof(s->ioport)),
+                            sizeof(s->ioport));
+            port_configured = true;
+        }
+    }
+
     return 0;
 }
 
diff --git a/hw/nvram/fw_cfg.c b/hw/nvram/fw_cfg.c
index 97bba874e37c5949f1fb8a39fb88d0723ef4db14..1a7e49c132dedc755bd02cd1bcb24f1027af21d0 100644
--- a/hw/nvram/fw_cfg.c
+++ b/hw/nvram/fw_cfg.c
@@ -489,11 +489,17 @@ FWCfgState *fw_cfg_init(uint32_t ctl_port, uint32_t data_port,
     dev = qdev_create(NULL, "fw_cfg");
     qdev_prop_set_uint32(dev, "ctl_iobase", ctl_port);
     qdev_prop_set_uint32(dev, "data_iobase", data_port);
-    qdev_init_nofail(dev);
     d = SYS_BUS_DEVICE(dev);
 
     s = DO_UPCAST(FWCfgState, busdev.qdev, dev);
 
+    if (!object_resolve_path("/machine/fw_cfg", NULL)) {
+        object_property_add_child(qdev_get_machine(), "fw_cfg", OBJECT(s),
+                                  NULL);
+    }
+
+    qdev_init_nofail(dev);
+
     if (ctl_addr) {
         sysbus_mmio_map(d, 0, ctl_addr);
     }