diff --git a/hw/pci-host/Makefile.objs b/hw/pci-host/Makefile.objs
index 45f1f0e..e341a49 100644
--- a/hw/pci-host/Makefile.objs
+++ b/hw/pci-host/Makefile.objs
@@ -11,6 +11,9 @@ common-obj-$(CONFIG_PPCE500_PCI) += ppce500.o
 # ARM devices
 common-obj-$(CONFIG_VERSATILE_PCI) += versatile.o
 
+# igd passthrough support
+common-obj-$(CONFIG_LINUX) += igd.o
+
 common-obj-$(CONFIG_PCI_APB) += apb.o
 common-obj-$(CONFIG_FULONG) += bonito.o
 common-obj-$(CONFIG_PCI_PIIX) += piix.o
diff --git a/hw/pci-host/igd.c b/hw/pci-host/igd.c
new file mode 100644
index 0000000..ef0273b
--- /dev/null
+++ b/hw/pci-host/igd.c
@@ -0,0 +1,96 @@
+#include "qemu-common.h"
+#include "hw/pci/pci.h"
+#include "hw/i386/pc.h"
+
+/* IGD Passthrough Host Bridge. */
+typedef struct {
+    uint8_t offset;
+    uint8_t len;
+} IGDHostInfo;
+
+/* Here we just expose minimal host bridge offset subset. */
+static const IGDHostInfo igd_host_bridge_infos[] = {
+    {0x08, 2},  /* revision id */
+    {0x2c, 2},  /* sybsystem vendor id */
+    {0x2e, 2},  /* sybsystem id */
+    {0x50, 2},  /* SNB: processor graphics control register */
+    {0x52, 2},  /* processor graphics control register */
+    {0xa4, 4},  /* SNB: graphics base of stolen memory */
+    {0xa8, 4},  /* SNB: base of GTT stolen memory */
+};
+
+static int host_pci_config_read(int pos, int len, uint32_t val)
+{
+    char path[PATH_MAX];
+    int config_fd;
+    ssize_t size = sizeof(path);
+    /* Access real host bridge. */
+    int rc = snprintf(path, size, "/sys/bus/pci/devices/%04x:%02x:%02x.%d/%s",
+                      0, 0, 0, 0, "config");
+    int ret = 0;
+
+    if (rc >= size || rc < 0) {
+        return -ENODEV;
+    }
+
+    config_fd = open(path, O_RDWR);
+    if (config_fd < 0) {
+        return -ENODEV;
+    }
+
+    if (lseek(config_fd, pos, SEEK_SET) != pos) {
+        ret = -errno;
+        goto out;
+    }
+    do {
+        rc = read(config_fd, (uint8_t *)&val, len);
+    } while (rc < 0 && (errno == EINTR || errno == EAGAIN));
+    if (rc != len) {
+        ret = -errno;
+    }
+out:
+    close(config_fd);
+    return ret;
+}
+
+static int igd_pt_i440fx_initfn(struct PCIDevice *pci_dev)
+{
+    uint32_t val = 0;
+    int rc, i, num;
+    int pos, len;
+
+    num = ARRAY_SIZE(igd_host_bridge_infos);
+    for (i = 0; i < num; i++) {
+        pos = igd_host_bridge_infos[i].offset;
+        len = igd_host_bridge_infos[i].len;
+        rc = host_pci_config_read(pos, len, val);
+        if (rc) {
+            return -ENODEV;
+        }
+        pci_default_write_config(pci_dev, pos, val, len);
+    }
+
+    return 0;
+}
+
+static void igd_passthrough_i440fx_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
+
+    k->init = igd_pt_i440fx_initfn;
+    dc->desc = "IGD Passthrough Host bridge";
+}
+
+static const TypeInfo igd_passthrough_i440fx_info = {
+    .name          = TYPE_IGD_PASSTHROUGH_I440FX_PCI_DEVICE,
+    .parent        = TYPE_I440FX_PCI_DEVICE,
+    .class_init    = igd_passthrough_i440fx_class_init,
+};
+
+static void igd_register_types(void)
+{
+    type_register_static(&igd_passthrough_i440fx_info);
+}
+
+type_init(igd_register_types)
diff --git a/hw/pci-host/piix.c b/hw/pci-host/piix.c
index 715208b..ccacb57 100644
--- a/hw/pci-host/piix.c
+++ b/hw/pci-host/piix.c
@@ -744,93 +744,6 @@ static const TypeInfo i440fx_info = {
     .class_init    = i440fx_class_init,
 };
 
-/* IGD Passthrough Host Bridge. */
-typedef struct {
-    uint8_t offset;
-    uint8_t len;
-} IGDHostInfo;
-
-/* Here we just expose minimal host bridge offset subset. */
-static const IGDHostInfo igd_host_bridge_infos[] = {
-    {0x08, 2},  /* revision id */
-    {0x2c, 2},  /* sybsystem vendor id */
-    {0x2e, 2},  /* sybsystem id */
-    {0x50, 2},  /* SNB: processor graphics control register */
-    {0x52, 2},  /* processor graphics control register */
-    {0xa4, 4},  /* SNB: graphics base of stolen memory */
-    {0xa8, 4},  /* SNB: base of GTT stolen memory */
-};
-
-static int host_pci_config_read(int pos, int len, uint32_t val)
-{
-    char path[PATH_MAX];
-    int config_fd;
-    ssize_t size = sizeof(path);
-    /* Access real host bridge. */
-    int rc = snprintf(path, size, "/sys/bus/pci/devices/%04x:%02x:%02x.%d/%s",
-                      0, 0, 0, 0, "config");
-    int ret = 0;
-
-    if (rc >= size || rc < 0) {
-        return -ENODEV;
-    }
-
-    config_fd = open(path, O_RDWR);
-    if (config_fd < 0) {
-        return -ENODEV;
-    }
-
-    if (lseek(config_fd, pos, SEEK_SET) != pos) {
-        ret = -errno;
-        goto out;
-    }
-    do {
-        rc = read(config_fd, (uint8_t *)&val, len);
-    } while (rc < 0 && (errno == EINTR || errno == EAGAIN));
-    if (rc != len) {
-        ret = -errno;
-    }
-out:
-    close(config_fd);
-    return ret;
-}
-
-static int igd_pt_i440fx_initfn(struct PCIDevice *pci_dev)
-{
-    uint32_t val = 0;
-    int rc, i, num;
-    int pos, len;
-
-    num = ARRAY_SIZE(igd_host_bridge_infos);
-    for (i = 0; i < num; i++) {
-        pos = igd_host_bridge_infos[i].offset;
-        len = igd_host_bridge_infos[i].len;
-        rc = host_pci_config_read(pos, len, val);
-        if (rc) {
-            return -ENODEV;
-        }
-        pci_default_write_config(pci_dev, pos, val, len);
-    }
-
-    return 0;
-}
-
-static void igd_passthrough_i440fx_class_init(ObjectClass *klass, void *data)
-{
-    DeviceClass *dc = DEVICE_CLASS(klass);
-    PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
-
-    k->init = igd_pt_i440fx_initfn;
-    dc->desc = "IGD Passthrough Host bridge";
-}
-
-static const TypeInfo igd_passthrough_i440fx_info = {
-    .name          = TYPE_IGD_PASSTHROUGH_I440FX_PCI_DEVICE,
-    .parent        = TYPE_I440FX_PCI_DEVICE,
-    .instance_size = sizeof(PCII440FXState),
-    .class_init    = igd_passthrough_i440fx_class_init,
-};
-
 static const char *i440fx_pcihost_root_bus_path(PCIHostState *host_bridge,
                                                 PCIBus *rootbus)
 {
@@ -872,7 +785,6 @@ static const TypeInfo i440fx_pcihost_info = {
 static void i440fx_register_types(void)
 {
     type_register_static(&i440fx_info);
-    type_register_static(&igd_passthrough_i440fx_info);
     type_register_static(&piix3_pci_type_info);
     type_register_static(&piix3_info);
     type_register_static(&piix3_xen_info);
