diff --git a/hw/pc.c b/hw/pc.c
index fcee09a005..c698161fe6 100644
--- a/hw/pc.c
+++ b/hw/pc.c
@@ -1133,6 +1133,7 @@ void pc_basic_device_init(qemu_irq *isa_irq,
     a20_line = qemu_allocate_irqs(handle_a20_line_change, first_cpu, 2);
     i8042 = isa_create_simple("i8042");
     i8042_setup_a20_line(i8042, &a20_line[0]);
+    vmport_init();
     vmmouse_init(i8042);
     port92 = isa_create_simple("port92");
     port92_init(port92, &a20_line[1]);
diff --git a/hw/pc.h b/hw/pc.h
index a048768d21..a7feaaeb05 100644
--- a/hw/pc.h
+++ b/hw/pc.h
@@ -65,7 +65,10 @@ void hpet_pit_disable(void);
 void hpet_pit_enable(void);
 
 /* vmport.c */
-void vmport_init(void);
+static inline void vmport_init(void)
+{
+    isa_create_simple("vmport");
+}
 void vmport_register(unsigned char command, IOPortReadFunc *func, void *opaque);
 
 /* vmmouse.c */
diff --git a/hw/pc_piix.c b/hw/pc_piix.c
index 7b744730f7..d0bd0cd1fa 100644
--- a/hw/pc_piix.c
+++ b/hw/pc_piix.c
@@ -86,8 +86,6 @@ static void pc_init1(ram_addr_t ram_size,
 
     pc_cpus_init(cpu_model);
 
-    vmport_init();
-
     /* allocate ram and load rom/bios */
     pc_memory_init(ram_size, kernel_filename, kernel_cmdline, initrd_filename,
                    &below_4g_mem_size, &above_4g_mem_size);
diff --git a/hw/vmport.c b/hw/vmport.c
index 6c9d7c9651..4432be02f7 100644
--- a/hw/vmport.c
+++ b/hw/vmport.c
@@ -26,6 +26,7 @@
 #include "pc.h"
 #include "sysemu.h"
 #include "kvm.h"
+#include "qdev.h"
 
 //#define VMPORT_DEBUG
 
@@ -37,6 +38,7 @@
 
 typedef struct _VMPortState
 {
+    ISADevice dev;
     IOPortReadFunc *func[VMPORT_ENTRIES];
     void *opaque[VMPORT_ENTRIES];
 } VMPortState;
@@ -100,12 +102,28 @@ static uint32_t vmport_cmd_ram_size(void *opaque, uint32_t addr)
     return ram_size;
 }
 
-void vmport_init(void)
+static int vmport_initfn(ISADevice *dev)
 {
-    register_ioport_read(0x5658, 1, 4, vmport_ioport_read, &port_state);
-    register_ioport_write(0x5658, 1, 4, vmport_ioport_write, &port_state);
+    VMPortState *s = DO_UPCAST(VMPortState, dev, dev);
 
+    register_ioport_read(0x5658, 1, 4, vmport_ioport_read, &s);
+    register_ioport_write(0x5658, 1, 4, vmport_ioport_write, &s);
+    isa_init_ioport(dev, 0x5658);
     /* Register some generic port commands */
     vmport_register(VMPORT_CMD_GETVERSION, vmport_cmd_get_version, NULL);
     vmport_register(VMPORT_CMD_GETRAMSIZE, vmport_cmd_ram_size, NULL);
+    return 0;
 }
+
+static ISADeviceInfo vmport_info = {
+    .qdev.name     = "vmport",
+    .qdev.size     = sizeof(VMPortState),
+    .qdev.no_user  = 1,
+    .init          = vmport_initfn,
+};
+
+static void vmport_dev_register(void)
+{
+    isa_qdev_register(&vmport_info);
+}
+device_init(vmport_dev_register)