Patchwork [v2,01/18] xen: re-name XenDevice to XenLegacyDevice...

login
register
mail settings
Submitter Paul Durrant
Date Dec. 6, 2018, 3:08 p.m.
Message ID <1544108924-10841-2-git-send-email-paul.durrant@citrix.com>
Download mbox | patch
Permalink /patch/674241/
State New
Headers show

Comments

Paul Durrant - Dec. 6, 2018, 3:08 p.m.
...and xen_backend.h to xen-legacy-backend.h

Rather than attempting to convert the existing backend infrastructure to
be QOM compliant (which would be hard to do in an incremental fashion),
subsequent patches will introduce a completely new framework for Xen PV
backends. Hence it is necessary to re-name parts of existing code to avoid
name clashes. The re-named 'legacy' infrastructure will be removed once all
backends have been ported to the new framework.

This patch is purely cosmetic. No functional change.

Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Acked-by: Anthony Perard <anthony.perard@citrix.com>
---
Cc: Stefano Stabellini <sstabellini@kernel.org>
Cc: Greg Kurz <groug@kaod.org>
Cc: Kevin Wolf <kwolf@redhat.com>
Cc: Max Reitz <mreitz@redhat.com>
Cc: "Marc-André Lureau" <marcandre.lureau@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
---
 hw/9pfs/xen-9p-backend.c            |  16 +-
 hw/block/xen_disk.c                 |  24 +-
 hw/char/xen_console.c               |  12 +-
 hw/display/xenfb.c                  |  25 +-
 hw/i386/xen/xen-hvm.c               |   2 +-
 hw/i386/xen/xen-mapcache.c          |   2 +-
 hw/i386/xen/xen_platform.c          |   2 +-
 hw/net/xen_nic.c                    |  14 +-
 hw/usb/xen-usb.c                    |  25 +-
 hw/xen/Makefile.objs                |   2 +-
 hw/xen/xen-common.c                 |   2 +-
 hw/xen/xen-legacy-backend.c         | 854 ++++++++++++++++++++++++++++++++++++
 hw/xen/xen_backend.c                | 845 -----------------------------------
 hw/xen/xen_devconfig.c              |   2 +-
 hw/xen/xen_pt.c                     |   2 +-
 hw/xen/xen_pt_config_init.c         |   2 +-
 hw/xen/xen_pt_graphics.c            |   2 +-
 hw/xen/xen_pt_msi.c                 |   2 +-
 hw/xen/xen_pvdev.c                  |  20 +-
 hw/xenpv/xen_domainbuild.c          |   2 +-
 hw/xenpv/xen_machine_pv.c           |   2 +-
 include/hw/xen/xen-legacy-backend.h | 104 +++++
 include/hw/xen/xen_backend.h        |  99 -----
 include/hw/xen/xen_pvdev.h          |  38 +-
 24 files changed, 1059 insertions(+), 1041 deletions(-)
 create mode 100644 hw/xen/xen-legacy-backend.c
 delete mode 100644 hw/xen/xen_backend.c
 create mode 100644 include/hw/xen/xen-legacy-backend.h
 delete mode 100644 include/hw/xen/xen_backend.h

Patch

diff --git a/hw/9pfs/xen-9p-backend.c b/hw/9pfs/xen-9p-backend.c
index 3f54a21..3859a06 100644
--- a/hw/9pfs/xen-9p-backend.c
+++ b/hw/9pfs/xen-9p-backend.c
@@ -12,7 +12,7 @@ 
 
 #include "hw/hw.h"
 #include "hw/9pfs/9p.h"
-#include "hw/xen/xen_backend.h"
+#include "hw/xen/xen-legacy-backend.h"
 #include "hw/9pfs/xen-9pfs.h"
 #include "qapi/error.h"
 #include "qemu/config-file.h"
@@ -45,7 +45,7 @@  typedef struct Xen9pfsRing {
 } Xen9pfsRing;
 
 typedef struct Xen9pfsDev {
-    struct XenDevice xendev;  /* must be first */
+    struct XenLegacyDevice xendev;  /* must be first */
     V9fsState state;
     char *path;
     char *security_model;
@@ -56,7 +56,7 @@  typedef struct Xen9pfsDev {
     Xen9pfsRing *rings;
 } Xen9pfsDev;
 
-static void xen_9pfs_disconnect(struct XenDevice *xendev);
+static void xen_9pfs_disconnect(struct XenLegacyDevice *xendev);
 
 static void xen_9pfs_in_sg(Xen9pfsRing *ring,
                            struct iovec *in_sg,
@@ -243,7 +243,7 @@  static const V9fsTransport xen_9p_transport = {
     .push_and_notify = xen_9pfs_push_and_notify,
 };
 
-static int xen_9pfs_init(struct XenDevice *xendev)
+static int xen_9pfs_init(struct XenLegacyDevice *xendev)
 {
     return 0;
 }
@@ -305,7 +305,7 @@  static void xen_9pfs_evtchn_event(void *opaque)
     qemu_bh_schedule(ring->bh);
 }
 
-static void xen_9pfs_disconnect(struct XenDevice *xendev)
+static void xen_9pfs_disconnect(struct XenLegacyDevice *xendev)
 {
     Xen9pfsDev *xen_9pdev = container_of(xendev, Xen9pfsDev, xendev);
     int i;
@@ -321,7 +321,7 @@  static void xen_9pfs_disconnect(struct XenDevice *xendev)
     }
 }
 
-static int xen_9pfs_free(struct XenDevice *xendev)
+static int xen_9pfs_free(struct XenLegacyDevice *xendev)
 {
     Xen9pfsDev *xen_9pdev = container_of(xendev, Xen9pfsDev, xendev);
     int i;
@@ -354,7 +354,7 @@  static int xen_9pfs_free(struct XenDevice *xendev)
     return 0;
 }
 
-static int xen_9pfs_connect(struct XenDevice *xendev)
+static int xen_9pfs_connect(struct XenLegacyDevice *xendev)
 {
     Error *err = NULL;
     int i;
@@ -467,7 +467,7 @@  out:
     return -1;
 }
 
-static void xen_9pfs_alloc(struct XenDevice *xendev)
+static void xen_9pfs_alloc(struct XenLegacyDevice *xendev)
 {
     xenstore_write_be_str(xendev, "versions", VERSIONS);
     xenstore_write_be_int(xendev, "max-rings", MAX_RINGS);
diff --git a/hw/block/xen_disk.c b/hw/block/xen_disk.c
index 36eff94..75fe55f 100644
--- a/hw/block/xen_disk.c
+++ b/hw/block/xen_disk.c
@@ -25,7 +25,7 @@ 
 #include <sys/uio.h>
 
 #include "hw/hw.h"
-#include "hw/xen/xen_backend.h"
+#include "hw/xen/xen-legacy-backend.h"
 #include "xen_blkif.h"
 #include "sysemu/blockdev.h"
 #include "sysemu/iothread.h"
@@ -63,7 +63,7 @@  struct ioreq {
 #define MAX_RING_PAGE_ORDER 4
 
 struct XenBlkDev {
-    struct XenDevice    xendev;  /* must be first */
+    struct XenLegacyDevice    xendev;  /* must be first */
     char                *params;
     char                *mode;
     char                *type;
@@ -179,7 +179,7 @@  static void ioreq_release(struct ioreq *ioreq, bool finish)
 static int ioreq_parse(struct ioreq *ioreq)
 {
     struct XenBlkDev *blkdev = ioreq->blkdev;
-    struct XenDevice *xendev = &blkdev->xendev;
+    struct XenLegacyDevice *xendev = &blkdev->xendev;
     size_t len;
     int i;
 
@@ -243,7 +243,7 @@  err:
 static int ioreq_grant_copy(struct ioreq *ioreq)
 {
     struct XenBlkDev *blkdev = ioreq->blkdev;
-    struct XenDevice *xendev = &blkdev->xendev;
+    struct XenLegacyDevice *xendev = &blkdev->xendev;
     XenGrantCopySegment segs[BLKIF_MAX_SEGMENTS_PER_REQUEST];
     int i, count, rc;
     int64_t file_blk = blkdev->file_blk;
@@ -289,7 +289,7 @@  static void qemu_aio_complete(void *opaque, int ret)
 {
     struct ioreq *ioreq = opaque;
     struct XenBlkDev *blkdev = ioreq->blkdev;
-    struct XenDevice *xendev = &blkdev->xendev;
+    struct XenLegacyDevice *xendev = &blkdev->xendev;
 
     aio_context_acquire(blkdev->ctx);
 
@@ -608,7 +608,7 @@  static void blk_bh(void *opaque)
     aio_context_release(blkdev->ctx);
 }
 
-static void blk_alloc(struct XenDevice *xendev)
+static void blk_alloc(struct XenLegacyDevice *xendev)
 {
     struct XenBlkDev *blkdev = container_of(xendev, struct XenBlkDev, xendev);
     Error *err = NULL;
@@ -628,7 +628,7 @@  static void blk_alloc(struct XenDevice *xendev)
 
 static void blk_parse_discard(struct XenBlkDev *blkdev)
 {
-    struct XenDevice *xendev = &blkdev->xendev;
+    struct XenLegacyDevice *xendev = &blkdev->xendev;
     int enable;
 
     blkdev->feature_discard = true;
@@ -642,7 +642,7 @@  static void blk_parse_discard(struct XenBlkDev *blkdev)
     }
 }
 
-static int blk_init(struct XenDevice *xendev)
+static int blk_init(struct XenLegacyDevice *xendev)
 {
     struct XenBlkDev *blkdev = container_of(xendev, struct XenBlkDev, xendev);
     int info = 0;
@@ -737,7 +737,7 @@  out_error:
     return -1;
 }
 
-static int blk_connect(struct XenDevice *xendev)
+static int blk_connect(struct XenLegacyDevice *xendev)
 {
     struct XenBlkDev *blkdev = container_of(xendev, struct XenBlkDev, xendev);
     int index, qflags;
@@ -941,7 +941,7 @@  static int blk_connect(struct XenDevice *xendev)
     return 0;
 }
 
-static void blk_disconnect(struct XenDevice *xendev)
+static void blk_disconnect(struct XenLegacyDevice *xendev)
 {
     struct XenBlkDev *blkdev = container_of(xendev, struct XenBlkDev, xendev);
 
@@ -966,7 +966,7 @@  static void blk_disconnect(struct XenDevice *xendev)
     }
 }
 
-static int blk_free(struct XenDevice *xendev)
+static int blk_free(struct XenLegacyDevice *xendev)
 {
     struct XenBlkDev *blkdev = container_of(xendev, struct XenBlkDev, xendev);
     struct ioreq *ioreq;
@@ -992,7 +992,7 @@  static int blk_free(struct XenDevice *xendev)
     return 0;
 }
 
-static void blk_event(struct XenDevice *xendev)
+static void blk_event(struct XenLegacyDevice *xendev)
 {
     struct XenBlkDev *blkdev = container_of(xendev, struct XenBlkDev, xendev);
 
diff --git a/hw/char/xen_console.c b/hw/char/xen_console.c
index 44f7236..460adc1 100644
--- a/hw/char/xen_console.c
+++ b/hw/char/xen_console.c
@@ -26,7 +26,7 @@ 
 #include "qapi/error.h"
 #include "hw/hw.h"
 #include "chardev/char-fe.h"
-#include "hw/xen/xen_backend.h"
+#include "hw/xen/xen-legacy-backend.h"
 
 #include <xen/io/console.h>
 
@@ -39,7 +39,7 @@  struct buffer {
 };
 
 struct XenConsole {
-    struct XenDevice  xendev;  /* must be first */
+    struct XenLegacyDevice  xendev;  /* must be first */
     struct buffer     buffer;
     char              console[XEN_BUFSIZE];
     int               ring_ref;
@@ -173,7 +173,7 @@  static void xencons_send(struct XenConsole *con)
 
 /* -------------------------------------------------------------------- */
 
-static int con_init(struct XenDevice *xendev)
+static int con_init(struct XenLegacyDevice *xendev)
 {
     struct XenConsole *con = container_of(xendev, struct XenConsole, xendev);
     char *type, *dom, label[32];
@@ -222,7 +222,7 @@  out:
     return ret;
 }
 
-static int con_initialise(struct XenDevice *xendev)
+static int con_initialise(struct XenLegacyDevice *xendev)
 {
     struct XenConsole *con = container_of(xendev, struct XenConsole, xendev);
     int limit;
@@ -259,7 +259,7 @@  static int con_initialise(struct XenDevice *xendev)
     return 0;
 }
 
-static void con_disconnect(struct XenDevice *xendev)
+static void con_disconnect(struct XenLegacyDevice *xendev)
 {
     struct XenConsole *con = container_of(xendev, struct XenConsole, xendev);
 
@@ -276,7 +276,7 @@  static void con_disconnect(struct XenDevice *xendev)
     }
 }
 
-static void con_event(struct XenDevice *xendev)
+static void con_event(struct XenLegacyDevice *xendev)
 {
     struct XenConsole *con = container_of(xendev, struct XenConsole, xendev);
 
diff --git a/hw/display/xenfb.c b/hw/display/xenfb.c
index 0330dc6..6202f11 100644
--- a/hw/display/xenfb.c
+++ b/hw/display/xenfb.c
@@ -30,7 +30,7 @@ 
 #include "hw/hw.h"
 #include "ui/input.h"
 #include "ui/console.h"
-#include "hw/xen/xen_backend.h"
+#include "hw/xen/xen-legacy-backend.h"
 
 #include <xen/event_channel.h>
 #include <xen/io/fbif.h>
@@ -46,7 +46,7 @@ 
 /* -------------------------------------------------------------------- */
 
 struct common {
-    struct XenDevice  xendev;  /* must be first */
+    struct XenLegacyDevice  xendev;  /* must be first */
     void              *page;
 };
 
@@ -342,14 +342,14 @@  static QemuInputHandler xenfb_rel_mouse = {
     .sync  = xenfb_mouse_sync,
 };
 
-static int input_init(struct XenDevice *xendev)
+static int input_init(struct XenLegacyDevice *xendev)
 {
     xenstore_write_be_int(xendev, "feature-abs-pointer", 1);
     xenstore_write_be_int(xendev, "feature-raw-pointer", 1);
     return 0;
 }
 
-static int input_initialise(struct XenDevice *xendev)
+static int input_initialise(struct XenLegacyDevice *xendev)
 {
     struct XenInput *in = container_of(xendev, struct XenInput, c.xendev);
     int rc;
@@ -361,7 +361,7 @@  static int input_initialise(struct XenDevice *xendev)
     return 0;
 }
 
-static void input_connected(struct XenDevice *xendev)
+static void input_connected(struct XenLegacyDevice *xendev)
 {
     struct XenInput *in = container_of(xendev, struct XenInput, c.xendev);
 
@@ -395,7 +395,7 @@  static void input_connected(struct XenDevice *xendev)
     }
 }
 
-static void input_disconnect(struct XenDevice *xendev)
+static void input_disconnect(struct XenLegacyDevice *xendev)
 {
     struct XenInput *in = container_of(xendev, struct XenInput, c.xendev);
 
@@ -410,7 +410,7 @@  static void input_disconnect(struct XenDevice *xendev)
     common_unbind(&in->c);
 }
 
-static void input_event(struct XenDevice *xendev)
+static void input_event(struct XenLegacyDevice *xendev)
 {
     struct XenInput *xenfb = container_of(xendev, struct XenInput, c.xendev);
     struct xenkbd_page *page = xenfb->c.page;
@@ -867,7 +867,7 @@  static void xenfb_handle_events(struct XenFB *xenfb)
     page->out_cons = cons;
 }
 
-static int fb_init(struct XenDevice *xendev)
+static int fb_init(struct XenLegacyDevice *xendev)
 {
 #ifdef XENFB_TYPE_RESIZE
     xenstore_write_be_int(xendev, "feature-resize", 1);
@@ -875,7 +875,7 @@  static int fb_init(struct XenDevice *xendev)
     return 0;
 }
 
-static int fb_initialise(struct XenDevice *xendev)
+static int fb_initialise(struct XenLegacyDevice *xendev)
 {
     struct XenFB *fb = container_of(xendev, struct XenFB, c.xendev);
     struct xenfb_page *fb_page;
@@ -912,7 +912,7 @@  static int fb_initialise(struct XenDevice *xendev)
     return 0;
 }
 
-static void fb_disconnect(struct XenDevice *xendev)
+static void fb_disconnect(struct XenLegacyDevice *xendev)
 {
     struct XenFB *fb = container_of(xendev, struct XenFB, c.xendev);
 
@@ -935,7 +935,8 @@  static void fb_disconnect(struct XenDevice *xendev)
     fb->bug_trigger    = 0;
 }
 
-static void fb_frontend_changed(struct XenDevice *xendev, const char *node)
+static void fb_frontend_changed(struct XenLegacyDevice *xendev,
+                                const char *node)
 {
     struct XenFB *fb = container_of(xendev, struct XenFB, c.xendev);
 
@@ -953,7 +954,7 @@  static void fb_frontend_changed(struct XenDevice *xendev, const char *node)
     }
 }
 
-static void fb_event(struct XenDevice *xendev)
+static void fb_event(struct XenLegacyDevice *xendev)
 {
     struct XenFB *xenfb = container_of(xendev, struct XenFB, c.xendev);
 
diff --git a/hw/i386/xen/xen-hvm.c b/hw/i386/xen/xen-hvm.c
index 935a367..1d63763 100644
--- a/hw/i386/xen/xen-hvm.c
+++ b/hw/i386/xen/xen-hvm.c
@@ -16,7 +16,7 @@ 
 #include "hw/i386/pc.h"
 #include "hw/i386/apic-msidef.h"
 #include "hw/xen/xen_common.h"
-#include "hw/xen/xen_backend.h"
+#include "hw/xen/xen-legacy-backend.h"
 #include "qapi/error.h"
 #include "qapi/qapi-commands-misc.h"
 #include "qemu/error-report.h"
diff --git a/hw/i386/xen/xen-mapcache.c b/hw/i386/xen/xen-mapcache.c
index 4e4f069..9134a7b 100644
--- a/hw/i386/xen/xen-mapcache.c
+++ b/hw/i386/xen/xen-mapcache.c
@@ -14,7 +14,7 @@ 
 
 #include <sys/resource.h>
 
-#include "hw/xen/xen_backend.h"
+#include "hw/xen/xen-legacy-backend.h"
 #include "qemu/bitmap.h"
 
 #include <xen/hvm/params.h>
diff --git a/hw/i386/xen/xen_platform.c b/hw/i386/xen/xen_platform.c
index deb7a0c..16afb54 100644
--- a/hw/i386/xen/xen_platform.c
+++ b/hw/i386/xen/xen_platform.c
@@ -30,7 +30,7 @@ 
 #include "hw/pci/pci.h"
 #include "hw/irq.h"
 #include "hw/xen/xen_common.h"
-#include "hw/xen/xen_backend.h"
+#include "hw/xen/xen-legacy-backend.h"
 #include "trace.h"
 #include "exec/address-spaces.h"
 #include "sysemu/block-backend.h"
diff --git a/hw/net/xen_nic.c b/hw/net/xen_nic.c
index 46a8dbf..37cda8e 100644
--- a/hw/net/xen_nic.c
+++ b/hw/net/xen_nic.c
@@ -28,14 +28,14 @@ 
 #include "net/net.h"
 #include "net/checksum.h"
 #include "net/util.h"
-#include "hw/xen/xen_backend.h"
+#include "hw/xen/xen-legacy-backend.h"
 
 #include <xen/io/netif.h>
 
 /* ------------------------------------------------------------- */
 
 struct XenNetDev {
-    struct XenDevice      xendev;  /* must be first */
+    struct XenLegacyDevice      xendev;  /* must be first */
     char                  *mac;
     int                   tx_work;
     int                   tx_ring_ref;
@@ -276,7 +276,7 @@  static NetClientInfo net_xen_info = {
     .receive = net_rx_packet,
 };
 
-static int net_init(struct XenDevice *xendev)
+static int net_init(struct XenLegacyDevice *xendev)
 {
     struct XenNetDev *netdev = container_of(xendev, struct XenNetDev, xendev);
 
@@ -308,7 +308,7 @@  static int net_init(struct XenDevice *xendev)
     return 0;
 }
 
-static int net_connect(struct XenDevice *xendev)
+static int net_connect(struct XenLegacyDevice *xendev)
 {
     struct XenNetDev *netdev = container_of(xendev, struct XenNetDev, xendev);
     int rx_copy;
@@ -363,7 +363,7 @@  static int net_connect(struct XenDevice *xendev)
     return 0;
 }
 
-static void net_disconnect(struct XenDevice *xendev)
+static void net_disconnect(struct XenLegacyDevice *xendev)
 {
     struct XenNetDev *netdev = container_of(xendev, struct XenNetDev, xendev);
 
@@ -379,14 +379,14 @@  static void net_disconnect(struct XenDevice *xendev)
     }
 }
 
-static void net_event(struct XenDevice *xendev)
+static void net_event(struct XenLegacyDevice *xendev)
 {
     struct XenNetDev *netdev = container_of(xendev, struct XenNetDev, xendev);
     net_tx_packets(netdev);
     qemu_flush_queued_packets(qemu_get_queue(netdev->nic));
 }
 
-static int net_free(struct XenDevice *xendev)
+static int net_free(struct XenLegacyDevice *xendev)
 {
     struct XenNetDev *netdev = container_of(xendev, struct XenNetDev, xendev);
 
diff --git a/hw/usb/xen-usb.c b/hw/usb/xen-usb.c
index 5b2e21e..9b2da6e 100644
--- a/hw/usb/xen-usb.c
+++ b/hw/usb/xen-usb.c
@@ -27,7 +27,7 @@ 
 #include "qemu/option.h"
 #include "hw/sysbus.h"
 #include "hw/usb.h"
-#include "hw/xen/xen_backend.h"
+#include "hw/xen/xen-legacy-backend.h"
 #include "monitor/qdev.h"
 #include "qapi/qmp/qdict.h"
 #include "qapi/qmp/qstring.h"
@@ -99,7 +99,7 @@  struct usbback_hotplug {
 };
 
 struct usbback_info {
-    struct XenDevice         xendev;  /* must be first */
+    struct XenLegacyDevice         xendev;  /* must be first */
     USBBus                   bus;
     void                     *urb_sring;
     void                     *conn_sring;
@@ -142,7 +142,7 @@  static int usbback_gnttab_map(struct usbback_req *usbback_req)
     unsigned int nr_segs, i, prot;
     uint32_t ref[USBIF_MAX_SEGMENTS_PER_REQUEST];
     struct usbback_info *usbif = usbback_req->usbif;
-    struct XenDevice *xendev = &usbif->xendev;
+    struct XenLegacyDevice *xendev = &usbif->xendev;
     struct usbif_request_segment *seg;
     void *addr;
 
@@ -220,7 +220,7 @@  static int usbback_gnttab_map(struct usbback_req *usbback_req)
 
 static int usbback_init_packet(struct usbback_req *usbback_req)
 {
-    struct XenDevice *xendev = &usbback_req->usbif->xendev;
+    struct XenLegacyDevice *xendev = &usbback_req->usbif->xendev;
     USBPacket *packet = &usbback_req->packet;
     USBDevice *dev = usbback_req->stub->dev;
     USBEndpoint *ep;
@@ -279,7 +279,7 @@  static void usbback_do_response(struct usbback_req *usbback_req, int32_t status,
 {
     struct usbback_info *usbif;
     struct usbif_urb_response *res;
-    struct XenDevice *xendev;
+    struct XenLegacyDevice *xendev;
     unsigned int notify;
 
     usbif = usbback_req->usbif;
@@ -824,7 +824,7 @@  static void usbback_process_port(struct usbback_info *usbif, unsigned port)
     g_free(busid);
 }
 
-static void usbback_disconnect(struct XenDevice *xendev)
+static void usbback_disconnect(struct XenLegacyDevice *xendev)
 {
     struct usbback_info *usbif;
     unsigned int i;
@@ -853,7 +853,7 @@  static void usbback_disconnect(struct XenDevice *xendev)
     TR_BUS(xendev, "finished\n");
 }
 
-static int usbback_connect(struct XenDevice *xendev)
+static int usbback_connect(struct XenLegacyDevice *xendev)
 {
     struct usbback_info *usbif;
     struct usbif_urb_sring *urb_sring;
@@ -909,7 +909,8 @@  static int usbback_connect(struct XenDevice *xendev)
     return 0;
 }
 
-static void usbback_backend_changed(struct XenDevice *xendev, const char *node)
+static void usbback_backend_changed(struct XenLegacyDevice *xendev,
+                                    const char *node)
 {
     struct usbback_info *usbif;
     unsigned int i;
@@ -922,7 +923,7 @@  static void usbback_backend_changed(struct XenDevice *xendev, const char *node)
     }
 }
 
-static int usbback_init(struct XenDevice *xendev)
+static int usbback_init(struct XenLegacyDevice *xendev)
 {
     struct usbback_info *usbif;
 
@@ -1001,7 +1002,7 @@  static USBPortOps xen_usb_port_ops = {
 static USBBusOps xen_usb_bus_ops = {
 };
 
-static void usbback_alloc(struct XenDevice *xendev)
+static void usbback_alloc(struct XenLegacyDevice *xendev)
 {
     struct usbback_info *usbif;
     USBPort *p;
@@ -1027,7 +1028,7 @@  static void usbback_alloc(struct XenDevice *xendev)
     xen_be_set_max_grant_refs(xendev, max_grants);
 }
 
-static int usbback_free(struct XenDevice *xendev)
+static int usbback_free(struct XenLegacyDevice *xendev)
 {
     struct usbback_info *usbif;
     struct usbback_req *usbback_req;
@@ -1066,7 +1067,7 @@  static int usbback_free(struct XenDevice *xendev)
     return 0;
 }
 
-static void usbback_event(struct XenDevice *xendev)
+static void usbback_event(struct XenLegacyDevice *xendev)
 {
     struct usbback_info *usbif;
 
diff --git a/hw/xen/Makefile.objs b/hw/xen/Makefile.objs
index 9ea5c73..3f64a44 100644
--- a/hw/xen/Makefile.objs
+++ b/hw/xen/Makefile.objs
@@ -1,5 +1,5 @@ 
 # xen backend driver support
-common-obj-$(CONFIG_XEN) += xen_backend.o xen_devconfig.o xen_pvdev.o xen-common.o
+common-obj-$(CONFIG_XEN) += xen-legacy-backend.o xen_devconfig.o xen_pvdev.o xen-common.o
 
 obj-$(CONFIG_XEN_PCI_PASSTHROUGH) += xen-host-pci-device.o
 obj-$(CONFIG_XEN_PCI_PASSTHROUGH) += xen_pt.o xen_pt_config_init.o xen_pt_graphics.o xen_pt_msi.o
diff --git a/hw/xen/xen-common.c b/hw/xen/xen-common.c
index 6ec14c7..ef130b2 100644
--- a/hw/xen/xen-common.c
+++ b/hw/xen/xen-common.c
@@ -10,7 +10,7 @@ 
 
 #include "qemu/osdep.h"
 #include "qemu/error-report.h"
-#include "hw/xen/xen_backend.h"
+#include "hw/xen/xen-legacy-backend.h"
 #include "chardev/char.h"
 #include "sysemu/accel.h"
 #include "migration/misc.h"
diff --git a/hw/xen/xen-legacy-backend.c b/hw/xen/xen-legacy-backend.c
new file mode 100644
index 0000000..0c26023
--- /dev/null
+++ b/hw/xen/xen-legacy-backend.c
@@ -0,0 +1,854 @@ 
+/*
+ *  xen backend driver infrastructure
+ *  (c) 2008 Gerd Hoffmann <kraxel@redhat.com>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; under version 2 of the License.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, see <http://www.gnu.org/licenses/>.
+ *
+ *  Contributions after 2012-01-13 are licensed under the terms of the
+ *  GNU GPL, version 2 or (at your option) any later version.
+ */
+
+/*
+ * TODO: add some xenbus / xenstore concepts overview here.
+ */
+
+#include "qemu/osdep.h"
+#include <sys/signal.h>
+
+#include "hw/hw.h"
+#include "hw/sysbus.h"
+#include "hw/boards.h"
+#include "qemu/log.h"
+#include "qapi/error.h"
+#include "hw/xen/xen-legacy-backend.h"
+#include "hw/xen/xen_pvdev.h"
+#include "monitor/qdev.h"
+
+#include <xen/grant_table.h>
+
+DeviceState *xen_sysdev;
+BusState *xen_sysbus;
+
+/* ------------------------------------------------------------- */
+
+/* public */
+struct xs_handle *xenstore;
+const char *xen_protocol;
+
+/* private */
+static bool xen_feature_grant_copy;
+static int debug;
+
+int xenstore_write_be_str(struct XenLegacyDevice *xendev, const char *node,
+                          const char *val)
+{
+    return xenstore_write_str(xendev->be, node, val);
+}
+
+int xenstore_write_be_int(struct XenLegacyDevice *xendev, const char *node,
+                          int ival)
+{
+    return xenstore_write_int(xendev->be, node, ival);
+}
+
+int xenstore_write_be_int64(struct XenLegacyDevice *xendev, const char *node,
+                            int64_t ival)
+{
+    return xenstore_write_int64(xendev->be, node, ival);
+}
+
+char *xenstore_read_be_str(struct XenLegacyDevice *xendev, const char *node)
+{
+    return xenstore_read_str(xendev->be, node);
+}
+
+int xenstore_read_be_int(struct XenLegacyDevice *xendev, const char *node,
+                         int *ival)
+{
+    return xenstore_read_int(xendev->be, node, ival);
+}
+
+char *xenstore_read_fe_str(struct XenLegacyDevice *xendev, const char *node)
+{
+    return xenstore_read_str(xendev->fe, node);
+}
+
+int xenstore_read_fe_int(struct XenLegacyDevice *xendev, const char *node,
+                         int *ival)
+{
+    return xenstore_read_int(xendev->fe, node, ival);
+}
+
+int xenstore_read_fe_uint64(struct XenLegacyDevice *xendev, const char *node,
+                            uint64_t *uval)
+{
+    return xenstore_read_uint64(xendev->fe, node, uval);
+}
+
+/* ------------------------------------------------------------- */
+
+int xen_be_set_state(struct XenLegacyDevice *xendev, enum xenbus_state state)
+{
+    int rc;
+
+    rc = xenstore_write_be_int(xendev, "state", state);
+    if (rc < 0) {
+        return rc;
+    }
+    xen_pv_printf(xendev, 1, "backend state: %s -> %s\n",
+                  xenbus_strstate(xendev->be_state), xenbus_strstate(state));
+    xendev->be_state = state;
+    return 0;
+}
+
+void xen_be_set_max_grant_refs(struct XenLegacyDevice *xendev,
+                               unsigned int nr_refs)
+{
+    assert(xendev->ops->flags & DEVOPS_FLAG_NEED_GNTDEV);
+
+    if (xengnttab_set_max_grants(xendev->gnttabdev, nr_refs)) {
+        xen_pv_printf(xendev, 0, "xengnttab_set_max_grants failed: %s\n",
+                      strerror(errno));
+    }
+}
+
+void *xen_be_map_grant_refs(struct XenLegacyDevice *xendev, uint32_t *refs,
+                            unsigned int nr_refs, int prot)
+{
+    void *ptr;
+
+    assert(xendev->ops->flags & DEVOPS_FLAG_NEED_GNTDEV);
+
+    ptr = xengnttab_map_domain_grant_refs(xendev->gnttabdev, nr_refs,
+                                          xen_domid, refs, prot);
+    if (!ptr) {
+        xen_pv_printf(xendev, 0,
+                      "xengnttab_map_domain_grant_refs failed: %s\n",
+                      strerror(errno));
+    }
+
+    return ptr;
+}
+
+void xen_be_unmap_grant_refs(struct XenLegacyDevice *xendev, void *ptr,
+                             unsigned int nr_refs)
+{
+    assert(xendev->ops->flags & DEVOPS_FLAG_NEED_GNTDEV);
+
+    if (xengnttab_unmap(xendev->gnttabdev, ptr, nr_refs)) {
+        xen_pv_printf(xendev, 0, "xengnttab_unmap failed: %s\n",
+                      strerror(errno));
+    }
+}
+
+static int compat_copy_grant_refs(struct XenLegacyDevice *xendev,
+                                  bool to_domain,
+                                  XenGrantCopySegment segs[],
+                                  unsigned int nr_segs)
+{
+    uint32_t *refs = g_new(uint32_t, nr_segs);
+    int prot = to_domain ? PROT_WRITE : PROT_READ;
+    void *pages;
+    unsigned int i;
+
+    for (i = 0; i < nr_segs; i++) {
+        XenGrantCopySegment *seg = &segs[i];
+
+        refs[i] = to_domain ?
+            seg->dest.foreign.ref : seg->source.foreign.ref;
+    }
+
+    pages = xengnttab_map_domain_grant_refs(xendev->gnttabdev, nr_segs,
+                                            xen_domid, refs, prot);
+    if (!pages) {
+        xen_pv_printf(xendev, 0,
+                      "xengnttab_map_domain_grant_refs failed: %s\n",
+                      strerror(errno));
+        g_free(refs);
+        return -1;
+    }
+
+    for (i = 0; i < nr_segs; i++) {
+        XenGrantCopySegment *seg = &segs[i];
+        void *page = pages + (i * XC_PAGE_SIZE);
+
+        if (to_domain) {
+            memcpy(page + seg->dest.foreign.offset, seg->source.virt,
+                   seg->len);
+        } else {
+            memcpy(seg->dest.virt, page + seg->source.foreign.offset,
+                   seg->len);
+        }
+    }
+
+    if (xengnttab_unmap(xendev->gnttabdev, pages, nr_segs)) {
+        xen_pv_printf(xendev, 0, "xengnttab_unmap failed: %s\n",
+                      strerror(errno));
+    }
+
+    g_free(refs);
+    return 0;
+}
+
+int xen_be_copy_grant_refs(struct XenLegacyDevice *xendev,
+                           bool to_domain,
+                           XenGrantCopySegment segs[],
+                           unsigned int nr_segs)
+{
+    xengnttab_grant_copy_segment_t *xengnttab_segs;
+    unsigned int i;
+    int rc;
+
+    assert(xendev->ops->flags & DEVOPS_FLAG_NEED_GNTDEV);
+
+    if (!xen_feature_grant_copy) {
+        return compat_copy_grant_refs(xendev, to_domain, segs, nr_segs);
+    }
+
+    xengnttab_segs = g_new0(xengnttab_grant_copy_segment_t, nr_segs);
+
+    for (i = 0; i < nr_segs; i++) {
+        XenGrantCopySegment *seg = &segs[i];
+        xengnttab_grant_copy_segment_t *xengnttab_seg = &xengnttab_segs[i];
+
+        if (to_domain) {
+            xengnttab_seg->flags = GNTCOPY_dest_gref;
+            xengnttab_seg->dest.foreign.domid = xen_domid;
+            xengnttab_seg->dest.foreign.ref = seg->dest.foreign.ref;
+            xengnttab_seg->dest.foreign.offset = seg->dest.foreign.offset;
+            xengnttab_seg->source.virt = seg->source.virt;
+        } else {
+            xengnttab_seg->flags = GNTCOPY_source_gref;
+            xengnttab_seg->source.foreign.domid = xen_domid;
+            xengnttab_seg->source.foreign.ref = seg->source.foreign.ref;
+            xengnttab_seg->source.foreign.offset =
+                seg->source.foreign.offset;
+            xengnttab_seg->dest.virt = seg->dest.virt;
+        }
+
+        xengnttab_seg->len = seg->len;
+    }
+
+    rc = xengnttab_grant_copy(xendev->gnttabdev, nr_segs, xengnttab_segs);
+
+    if (rc) {
+        xen_pv_printf(xendev, 0, "xengnttab_copy failed: %s\n",
+                      strerror(errno));
+    }
+
+    for (i = 0; i < nr_segs; i++) {
+        xengnttab_grant_copy_segment_t *xengnttab_seg =
+            &xengnttab_segs[i];
+
+        if (xengnttab_seg->status != GNTST_okay) {
+            xen_pv_printf(xendev, 0, "segment[%u] status: %d\n", i,
+                          xengnttab_seg->status);
+            rc = -1;
+        }
+    }
+
+    g_free(xengnttab_segs);
+    return rc;
+}
+
+/*
+ * get xen backend device, allocate a new one if it doesn't exist.
+ */
+static struct XenLegacyDevice *xen_be_get_xendev(const char *type, int dom,
+                                                 int dev,
+                                                 struct XenDevOps *ops)
+{
+    struct XenLegacyDevice *xendev;
+
+    xendev = xen_pv_find_xendev(type, dom, dev);
+    if (xendev) {
+        return xendev;
+    }
+
+    /* init new xendev */
+    xendev = g_malloc0(ops->size);
+    object_initialize(&xendev->qdev, ops->size, TYPE_XENBACKEND);
+    OBJECT(xendev)->free = g_free;
+    qdev_set_parent_bus(DEVICE(xendev), xen_sysbus);
+    qdev_set_id(DEVICE(xendev), g_strdup_printf("xen-%s-%d", type, dev));
+    qdev_init_nofail(DEVICE(xendev));
+    object_unref(OBJECT(xendev));
+
+    xendev->type  = type;
+    xendev->dom   = dom;
+    xendev->dev   = dev;
+    xendev->ops   = ops;
+
+    snprintf(xendev->be, sizeof(xendev->be), "backend/%s/%d/%d",
+             xendev->type, xendev->dom, xendev->dev);
+    snprintf(xendev->name, sizeof(xendev->name), "%s-%d",
+             xendev->type, xendev->dev);
+
+    xendev->debug      = debug;
+    xendev->local_port = -1;
+
+    xendev->evtchndev = xenevtchn_open(NULL, 0);
+    if (xendev->evtchndev == NULL) {
+        xen_pv_printf(NULL, 0, "can't open evtchn device\n");
+        qdev_unplug(DEVICE(xendev), NULL);
+        return NULL;
+    }
+    qemu_set_cloexec(xenevtchn_fd(xendev->evtchndev));
+
+    xen_pv_insert_xendev(xendev);
+
+    if (xendev->ops->alloc) {
+        xendev->ops->alloc(xendev);
+    }
+
+    return xendev;
+}
+
+
+/*
+ * Sync internal data structures on xenstore updates.
+ * Node specifies the changed field.  node = NULL means
+ * update all fields (used for initialization).
+ */
+static void xen_be_backend_changed(struct XenLegacyDevice *xendev,
+                                   const char *node)
+{
+    if (node == NULL  ||  strcmp(node, "online") == 0) {
+        if (xenstore_read_be_int(xendev, "online", &xendev->online) == -1) {
+            xendev->online = 0;
+        }
+    }
+
+    if (node) {
+        xen_pv_printf(xendev, 2, "backend update: %s\n", node);
+        if (xendev->ops->backend_changed) {
+            xendev->ops->backend_changed(xendev, node);
+        }
+    }
+}
+
+static void xen_be_frontend_changed(struct XenLegacyDevice *xendev,
+                                    const char *node)
+{
+    int fe_state;
+
+    if (node == NULL  ||  strcmp(node, "state") == 0) {
+        if (xenstore_read_fe_int(xendev, "state", &fe_state) == -1) {
+            fe_state = XenbusStateUnknown;
+        }
+        if (xendev->fe_state != fe_state) {
+            xen_pv_printf(xendev, 1, "frontend state: %s -> %s\n",
+                          xenbus_strstate(xendev->fe_state),
+                          xenbus_strstate(fe_state));
+        }
+        xendev->fe_state = fe_state;
+    }
+    if (node == NULL  ||  strcmp(node, "protocol") == 0) {
+        g_free(xendev->protocol);
+        xendev->protocol = xenstore_read_fe_str(xendev, "protocol");
+        if (xendev->protocol) {
+            xen_pv_printf(xendev, 1, "frontend protocol: %s\n",
+                          xendev->protocol);
+        }
+    }
+
+    if (node) {
+        xen_pv_printf(xendev, 2, "frontend update: %s\n", node);
+        if (xendev->ops->frontend_changed) {
+            xendev->ops->frontend_changed(xendev, node);
+        }
+    }
+}
+
+/* ------------------------------------------------------------- */
+/* Check for possible state transitions and perform them.        */
+
+/*
+ * Initial xendev setup.  Read frontend path, register watch for it.
+ * Should succeed once xend finished setting up the backend device.
+ *
+ * Also sets initial state (-> Initializing) when done.  Which
+ * only affects the xendev->be_state variable as xenbus should
+ * already be put into that state by xend.
+ */
+static int xen_be_try_setup(struct XenLegacyDevice *xendev)
+{
+    char token[XEN_BUFSIZE];
+    int be_state;
+
+    if (xenstore_read_be_int(xendev, "state", &be_state) == -1) {
+        xen_pv_printf(xendev, 0, "reading backend state failed\n");
+        return -1;
+    }
+
+    if (be_state != XenbusStateInitialising) {
+        xen_pv_printf(xendev, 0, "initial backend state is wrong (%s)\n",
+                      xenbus_strstate(be_state));
+        return -1;
+    }
+
+    xendev->fe = xenstore_read_be_str(xendev, "frontend");
+    if (xendev->fe == NULL) {
+        xen_pv_printf(xendev, 0, "reading frontend path failed\n");
+        return -1;
+    }
+
+    /* setup frontend watch */
+    snprintf(token, sizeof(token), "fe:%p", xendev);
+    if (!xs_watch(xenstore, xendev->fe, token)) {
+        xen_pv_printf(xendev, 0, "watching frontend path (%s) failed\n",
+                      xendev->fe);
+        return -1;
+    }
+    xen_be_set_state(xendev, XenbusStateInitialising);
+
+    xen_be_backend_changed(xendev, NULL);
+    xen_be_frontend_changed(xendev, NULL);
+    return 0;
+}
+
+/*
+ * Try initialize xendev.  Prepare everything the backend can do
+ * without synchronizing with the frontend.  Fakes hotplug-status.  No
+ * hotplug involved here because this is about userspace drivers, thus
+ * there are kernel backend devices which could invoke hotplug.
+ *
+ * Goes to InitWait on success.
+ */
+static int xen_be_try_init(struct XenLegacyDevice *xendev)
+{
+    int rc = 0;
+
+    if (!xendev->online) {
+        xen_pv_printf(xendev, 1, "not online\n");
+        return -1;
+    }
+
+    if (xendev->ops->init) {
+        rc = xendev->ops->init(xendev);
+    }
+    if (rc != 0) {
+        xen_pv_printf(xendev, 1, "init() failed\n");
+        return rc;
+    }
+
+    xenstore_write_be_str(xendev, "hotplug-status", "connected");
+    xen_be_set_state(xendev, XenbusStateInitWait);
+    return 0;
+}
+
+/*
+ * Try to initialise xendev.  Depends on the frontend being ready
+ * for it (shared ring and evtchn info in xenstore, state being
+ * Initialised or Connected).
+ *
+ * Goes to Connected on success.
+ */
+static int xen_be_try_initialise(struct XenLegacyDevice *xendev)
+{
+    int rc = 0;
+
+    if (xendev->fe_state != XenbusStateInitialised  &&
+        xendev->fe_state != XenbusStateConnected) {
+        if (xendev->ops->flags & DEVOPS_FLAG_IGNORE_STATE) {
+            xen_pv_printf(xendev, 2, "frontend not ready, ignoring\n");
+        } else {
+            xen_pv_printf(xendev, 2, "frontend not ready (yet)\n");
+            return -1;
+        }
+    }
+
+    if (xendev->ops->flags & DEVOPS_FLAG_NEED_GNTDEV) {
+        xendev->gnttabdev = xengnttab_open(NULL, 0);
+        if (xendev->gnttabdev == NULL) {
+            xen_pv_printf(NULL, 0, "can't open gnttab device\n");
+            return -1;
+        }
+    } else {
+        xendev->gnttabdev = NULL;
+    }
+
+    if (xendev->ops->initialise) {
+        rc = xendev->ops->initialise(xendev);
+    }
+    if (rc != 0) {
+        xen_pv_printf(xendev, 0, "initialise() failed\n");
+        return rc;
+    }
+
+    xen_be_set_state(xendev, XenbusStateConnected);
+    return 0;
+}
+
+/*
+ * Try to let xendev know that it is connected.  Depends on the
+ * frontend being Connected.  Note that this may be called more
+ * than once since the backend state is not modified.
+ */
+static void xen_be_try_connected(struct XenLegacyDevice *xendev)
+{
+    if (!xendev->ops->connected) {
+        return;
+    }
+
+    if (xendev->fe_state != XenbusStateConnected) {
+        if (xendev->ops->flags & DEVOPS_FLAG_IGNORE_STATE) {
+            xen_pv_printf(xendev, 2, "frontend not ready, ignoring\n");
+        } else {
+            xen_pv_printf(xendev, 2, "frontend not ready (yet)\n");
+            return;
+        }
+    }
+
+    xendev->ops->connected(xendev);
+}
+
+/*
+ * Teardown connection.
+ *
+ * Goes to Closed when done.
+ */
+static void xen_be_disconnect(struct XenLegacyDevice *xendev,
+                              enum xenbus_state state)
+{
+    if (xendev->be_state != XenbusStateClosing &&
+        xendev->be_state != XenbusStateClosed  &&
+        xendev->ops->disconnect) {
+        xendev->ops->disconnect(xendev);
+    }
+    if (xendev->gnttabdev) {
+        xengnttab_close(xendev->gnttabdev);
+        xendev->gnttabdev = NULL;
+    }
+    if (xendev->be_state != state) {
+        xen_be_set_state(xendev, state);
+    }
+}
+
+/*
+ * Try to reset xendev, for reconnection by another frontend instance.
+ */
+static int xen_be_try_reset(struct XenLegacyDevice *xendev)
+{
+    if (xendev->fe_state != XenbusStateInitialising) {
+        return -1;
+    }
+
+    xen_pv_printf(xendev, 1, "device reset (for re-connect)\n");
+    xen_be_set_state(xendev, XenbusStateInitialising);
+    return 0;
+}
+
+/*
+ * state change dispatcher function
+ */
+void xen_be_check_state(struct XenLegacyDevice *xendev)
+{
+    int rc = 0;
+
+    /* frontend may request shutdown from almost anywhere */
+    if (xendev->fe_state == XenbusStateClosing ||
+        xendev->fe_state == XenbusStateClosed) {
+        xen_be_disconnect(xendev, xendev->fe_state);
+        return;
+    }
+
+    /* check for possible backend state transitions */
+    for (;;) {
+        switch (xendev->be_state) {
+        case XenbusStateUnknown:
+            rc = xen_be_try_setup(xendev);
+            break;
+        case XenbusStateInitialising:
+            rc = xen_be_try_init(xendev);
+            break;
+        case XenbusStateInitWait:
+            rc = xen_be_try_initialise(xendev);
+            break;
+        case XenbusStateConnected:
+            /* xendev->be_state doesn't change */
+            xen_be_try_connected(xendev);
+            rc = -1;
+            break;
+        case XenbusStateClosed:
+            rc = xen_be_try_reset(xendev);
+            break;
+        default:
+            rc = -1;
+        }
+        if (rc != 0) {
+            break;
+        }
+    }
+}
+
+/* ------------------------------------------------------------- */
+
+static int xenstore_scan(const char *type, int dom, struct XenDevOps *ops)
+{
+    struct XenLegacyDevice *xendev;
+    char path[XEN_BUFSIZE], token[XEN_BUFSIZE];
+    char **dev = NULL;
+    unsigned int cdev, j;
+
+    /* setup watch */
+    snprintf(token, sizeof(token), "be:%p:%d:%p", type, dom, ops);
+    snprintf(path, sizeof(path), "backend/%s/%d", type, dom);
+    if (!xs_watch(xenstore, path, token)) {
+        xen_pv_printf(NULL, 0, "xen be: watching backend path (%s) failed\n",
+                      path);
+        return -1;
+    }
+
+    /* look for backends */
+    dev = xs_directory(xenstore, 0, path, &cdev);
+    if (!dev) {
+        return 0;
+    }
+    for (j = 0; j < cdev; j++) {
+        xendev = xen_be_get_xendev(type, dom, atoi(dev[j]), ops);
+        if (xendev == NULL) {
+            continue;
+        }
+        xen_be_check_state(xendev);
+    }
+    free(dev);
+    return 0;
+}
+
+void xenstore_update_be(char *watch, char *type, int dom,
+                        struct XenDevOps *ops)
+{
+    struct XenLegacyDevice *xendev;
+    char path[XEN_BUFSIZE], *bepath;
+    unsigned int len, dev;
+
+    len = snprintf(path, sizeof(path), "backend/%s/%d", type, dom);
+    if (strncmp(path, watch, len) != 0) {
+        return;
+    }
+    if (sscanf(watch + len, "/%u/%255s", &dev, path) != 2) {
+        strcpy(path, "");
+        if (sscanf(watch + len, "/%u", &dev) != 1) {
+            dev = -1;
+        }
+    }
+    if (dev == -1) {
+        return;
+    }
+
+    xendev = xen_be_get_xendev(type, dom, dev, ops);
+    if (xendev != NULL) {
+        bepath = xs_read(xenstore, 0, xendev->be, &len);
+        if (bepath == NULL) {
+            xen_pv_del_xendev(xendev);
+        } else {
+            free(bepath);
+            xen_be_backend_changed(xendev, path);
+            xen_be_check_state(xendev);
+        }
+    }
+}
+
+void xenstore_update_fe(char *watch, struct XenLegacyDevice *xendev)
+{
+    char *node;
+    unsigned int len;
+
+    len = strlen(xendev->fe);
+    if (strncmp(xendev->fe, watch, len) != 0) {
+        return;
+    }
+    if (watch[len] != '/') {
+        return;
+    }
+    node = watch + len + 1;
+
+    xen_be_frontend_changed(xendev, node);
+    xen_be_check_state(xendev);
+}
+/* -------------------------------------------------------------------- */
+
+int xen_be_init(void)
+{
+    xengnttab_handle *gnttabdev;
+
+    xenstore = xs_daemon_open();
+    if (!xenstore) {
+        xen_pv_printf(NULL, 0, "can't connect to xenstored\n");
+        return -1;
+    }
+
+    qemu_set_fd_handler(xs_fileno(xenstore), xenstore_update, NULL, NULL);
+
+    if (xen_xc == NULL || xen_fmem == NULL) {
+        /* Check if xen_init() have been called */
+        goto err;
+    }
+
+    gnttabdev = xengnttab_open(NULL, 0);
+    if (gnttabdev != NULL) {
+        if (xengnttab_grant_copy(gnttabdev, 0, NULL) == 0) {
+            xen_feature_grant_copy = true;
+        }
+        xengnttab_close(gnttabdev);
+    }
+
+    xen_sysdev = qdev_create(NULL, TYPE_XENSYSDEV);
+    qdev_init_nofail(xen_sysdev);
+    xen_sysbus = qbus_create(TYPE_XENSYSBUS, DEVICE(xen_sysdev), "xen-sysbus");
+    qbus_set_bus_hotplug_handler(xen_sysbus, &error_abort);
+
+    return 0;
+
+err:
+    qemu_set_fd_handler(xs_fileno(xenstore), NULL, NULL, NULL);
+    xs_daemon_close(xenstore);
+    xenstore = NULL;
+
+    return -1;
+}
+
+static void xen_set_dynamic_sysbus(void)
+{
+    Object *machine = qdev_get_machine();
+    ObjectClass *oc = object_get_class(machine);
+    MachineClass *mc = MACHINE_CLASS(oc);
+
+    machine_class_allow_dynamic_sysbus_dev(mc, TYPE_XENSYSDEV);
+}
+
+int xen_be_register(const char *type, struct XenDevOps *ops)
+{
+    char path[50];
+    int rc;
+
+    if (ops->backend_register) {
+        rc = ops->backend_register();
+        if (rc) {
+            return rc;
+        }
+    }
+
+    snprintf(path, sizeof(path), "device-model/%u/backends/%s", xen_domid,
+             type);
+    xenstore_mkdir(path, XS_PERM_NONE);
+
+    return xenstore_scan(type, xen_domid, ops);
+}
+
+void xen_be_register_common(void)
+{
+    xen_set_dynamic_sysbus();
+
+    xen_be_register("console", &xen_console_ops);
+    xen_be_register("vkbd", &xen_kbdmouse_ops);
+    xen_be_register("qdisk", &xen_blkdev_ops);
+#ifdef CONFIG_VIRTFS
+    xen_be_register("9pfs", &xen_9pfs_ops);
+#endif
+#ifdef CONFIG_USB_LIBUSB
+    xen_be_register("qusb", &xen_usb_ops);
+#endif
+}
+
+int xen_be_bind_evtchn(struct XenLegacyDevice *xendev)
+{
+    if (xendev->local_port != -1) {
+        return 0;
+    }
+    xendev->local_port = xenevtchn_bind_interdomain
+        (xendev->evtchndev, xendev->dom, xendev->remote_port);
+    if (xendev->local_port == -1) {
+        xen_pv_printf(xendev, 0, "xenevtchn_bind_interdomain failed\n");
+        return -1;
+    }
+    xen_pv_printf(xendev, 2, "bind evtchn port %d\n", xendev->local_port);
+    qemu_set_fd_handler(xenevtchn_fd(xendev->evtchndev),
+                        xen_pv_evtchn_event, NULL, xendev);
+    return 0;
+}
+
+
+static Property xendev_properties[] = {
+    DEFINE_PROP_END_OF_LIST(),
+};
+
+static void xendev_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+
+    dc->props = xendev_properties;
+    set_bit(DEVICE_CATEGORY_MISC, dc->categories);
+    /* xen-backend devices can be plugged/unplugged dynamically */
+    dc->user_creatable = true;
+}
+
+static const TypeInfo xendev_type_info = {
+    .name          = TYPE_XENBACKEND,
+    .parent        = TYPE_XENSYSDEV,
+    .class_init    = xendev_class_init,
+    .instance_size = sizeof(struct XenLegacyDevice),
+};
+
+static void xen_sysbus_class_init(ObjectClass *klass, void *data)
+{
+    HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
+
+    hc->unplug = qdev_simple_device_unplug_cb;
+}
+
+static const TypeInfo xensysbus_info = {
+    .name       = TYPE_XENSYSBUS,
+    .parent     = TYPE_BUS,
+    .class_init = xen_sysbus_class_init,
+    .interfaces = (InterfaceInfo[]) {
+        { TYPE_HOTPLUG_HANDLER },
+        { }
+    }
+};
+
+static int xen_sysdev_init(SysBusDevice *dev)
+{
+    return 0;
+}
+
+static Property xen_sysdev_properties[] = {
+    {/* end of property list */},
+};
+
+static void xen_sysdev_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
+
+    k->init = xen_sysdev_init;
+    dc->props = xen_sysdev_properties;
+    dc->bus_type = TYPE_XENSYSBUS;
+}
+
+static const TypeInfo xensysdev_info = {
+    .name          = TYPE_XENSYSDEV,
+    .parent        = TYPE_SYS_BUS_DEVICE,
+    .instance_size = sizeof(SysBusDevice),
+    .class_init    = xen_sysdev_class_init,
+};
+
+static void xenbe_register_types(void)
+{
+    type_register_static(&xensysbus_info);
+    type_register_static(&xensysdev_info);
+    type_register_static(&xendev_type_info);
+}
+
+type_init(xenbe_register_types)
diff --git a/hw/xen/xen_backend.c b/hw/xen/xen_backend.c
deleted file mode 100644
index 9a8e877..0000000
--- a/hw/xen/xen_backend.c
+++ /dev/null
@@ -1,845 +0,0 @@ 
-/*
- *  xen backend driver infrastructure
- *  (c) 2008 Gerd Hoffmann <kraxel@redhat.com>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; under version 2 of the License.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, see <http://www.gnu.org/licenses/>.
- *
- *  Contributions after 2012-01-13 are licensed under the terms of the
- *  GNU GPL, version 2 or (at your option) any later version.
- */
-
-/*
- * TODO: add some xenbus / xenstore concepts overview here.
- */
-
-#include "qemu/osdep.h"
-#include <sys/signal.h>
-
-#include "hw/hw.h"
-#include "hw/sysbus.h"
-#include "hw/boards.h"
-#include "qemu/log.h"
-#include "qapi/error.h"
-#include "hw/xen/xen_backend.h"
-#include "hw/xen/xen_pvdev.h"
-#include "monitor/qdev.h"
-
-#include <xen/grant_table.h>
-
-DeviceState *xen_sysdev;
-BusState *xen_sysbus;
-
-/* ------------------------------------------------------------- */
-
-/* public */
-struct xs_handle *xenstore = NULL;
-const char *xen_protocol;
-
-/* private */
-static bool xen_feature_grant_copy;
-static int debug;
-
-int xenstore_write_be_str(struct XenDevice *xendev, const char *node, const char *val)
-{
-    return xenstore_write_str(xendev->be, node, val);
-}
-
-int xenstore_write_be_int(struct XenDevice *xendev, const char *node, int ival)
-{
-    return xenstore_write_int(xendev->be, node, ival);
-}
-
-int xenstore_write_be_int64(struct XenDevice *xendev, const char *node, int64_t ival)
-{
-    return xenstore_write_int64(xendev->be, node, ival);
-}
-
-char *xenstore_read_be_str(struct XenDevice *xendev, const char *node)
-{
-    return xenstore_read_str(xendev->be, node);
-}
-
-int xenstore_read_be_int(struct XenDevice *xendev, const char *node, int *ival)
-{
-    return xenstore_read_int(xendev->be, node, ival);
-}
-
-char *xenstore_read_fe_str(struct XenDevice *xendev, const char *node)
-{
-    return xenstore_read_str(xendev->fe, node);
-}
-
-int xenstore_read_fe_int(struct XenDevice *xendev, const char *node, int *ival)
-{
-    return xenstore_read_int(xendev->fe, node, ival);
-}
-
-int xenstore_read_fe_uint64(struct XenDevice *xendev, const char *node,
-                            uint64_t *uval)
-{
-    return xenstore_read_uint64(xendev->fe, node, uval);
-}
-
-/* ------------------------------------------------------------- */
-
-int xen_be_set_state(struct XenDevice *xendev, enum xenbus_state state)
-{
-    int rc;
-
-    rc = xenstore_write_be_int(xendev, "state", state);
-    if (rc < 0) {
-        return rc;
-    }
-    xen_pv_printf(xendev, 1, "backend state: %s -> %s\n",
-                  xenbus_strstate(xendev->be_state), xenbus_strstate(state));
-    xendev->be_state = state;
-    return 0;
-}
-
-void xen_be_set_max_grant_refs(struct XenDevice *xendev,
-                               unsigned int nr_refs)
-{
-    assert(xendev->ops->flags & DEVOPS_FLAG_NEED_GNTDEV);
-
-    if (xengnttab_set_max_grants(xendev->gnttabdev, nr_refs)) {
-        xen_pv_printf(xendev, 0, "xengnttab_set_max_grants failed: %s\n",
-                      strerror(errno));
-    }
-}
-
-void *xen_be_map_grant_refs(struct XenDevice *xendev, uint32_t *refs,
-                            unsigned int nr_refs, int prot)
-{
-    void *ptr;
-
-    assert(xendev->ops->flags & DEVOPS_FLAG_NEED_GNTDEV);
-
-    ptr = xengnttab_map_domain_grant_refs(xendev->gnttabdev, nr_refs,
-                                          xen_domid, refs, prot);
-    if (!ptr) {
-        xen_pv_printf(xendev, 0,
-                      "xengnttab_map_domain_grant_refs failed: %s\n",
-                      strerror(errno));
-    }
-
-    return ptr;
-}
-
-void xen_be_unmap_grant_refs(struct XenDevice *xendev, void *ptr,
-                             unsigned int nr_refs)
-{
-    assert(xendev->ops->flags & DEVOPS_FLAG_NEED_GNTDEV);
-
-    if (xengnttab_unmap(xendev->gnttabdev, ptr, nr_refs)) {
-        xen_pv_printf(xendev, 0, "xengnttab_unmap failed: %s\n",
-                      strerror(errno));
-    }
-}
-
-static int compat_copy_grant_refs(struct XenDevice *xendev,
-                                  bool to_domain,
-                                  XenGrantCopySegment segs[],
-                                  unsigned int nr_segs)
-{
-    uint32_t *refs = g_new(uint32_t, nr_segs);
-    int prot = to_domain ? PROT_WRITE : PROT_READ;
-    void *pages;
-    unsigned int i;
-
-    for (i = 0; i < nr_segs; i++) {
-        XenGrantCopySegment *seg = &segs[i];
-
-        refs[i] = to_domain ?
-            seg->dest.foreign.ref : seg->source.foreign.ref;
-    }
-
-    pages = xengnttab_map_domain_grant_refs(xendev->gnttabdev, nr_segs,
-                                            xen_domid, refs, prot);
-    if (!pages) {
-        xen_pv_printf(xendev, 0,
-                      "xengnttab_map_domain_grant_refs failed: %s\n",
-                      strerror(errno));
-        g_free(refs);
-        return -1;
-    }
-
-    for (i = 0; i < nr_segs; i++) {
-        XenGrantCopySegment *seg = &segs[i];
-        void *page = pages + (i * XC_PAGE_SIZE);
-
-        if (to_domain) {
-            memcpy(page + seg->dest.foreign.offset, seg->source.virt,
-                   seg->len);
-        } else {
-            memcpy(seg->dest.virt, page + seg->source.foreign.offset,
-                   seg->len);
-        }
-    }
-
-    if (xengnttab_unmap(xendev->gnttabdev, pages, nr_segs)) {
-        xen_pv_printf(xendev, 0, "xengnttab_unmap failed: %s\n",
-                      strerror(errno));
-    }
-
-    g_free(refs);
-    return 0;
-}
-
-int xen_be_copy_grant_refs(struct XenDevice *xendev,
-                           bool to_domain,
-                           XenGrantCopySegment segs[],
-                           unsigned int nr_segs)
-{
-    xengnttab_grant_copy_segment_t *xengnttab_segs;
-    unsigned int i;
-    int rc;
-
-    assert(xendev->ops->flags & DEVOPS_FLAG_NEED_GNTDEV);
-
-    if (!xen_feature_grant_copy) {
-        return compat_copy_grant_refs(xendev, to_domain, segs, nr_segs);
-    }
-
-    xengnttab_segs = g_new0(xengnttab_grant_copy_segment_t, nr_segs);
-
-    for (i = 0; i < nr_segs; i++) {
-        XenGrantCopySegment *seg = &segs[i];
-        xengnttab_grant_copy_segment_t *xengnttab_seg = &xengnttab_segs[i];
-
-        if (to_domain) {
-            xengnttab_seg->flags = GNTCOPY_dest_gref;
-            xengnttab_seg->dest.foreign.domid = xen_domid;
-            xengnttab_seg->dest.foreign.ref = seg->dest.foreign.ref;
-            xengnttab_seg->dest.foreign.offset = seg->dest.foreign.offset;
-            xengnttab_seg->source.virt = seg->source.virt;
-        } else {
-            xengnttab_seg->flags = GNTCOPY_source_gref;
-            xengnttab_seg->source.foreign.domid = xen_domid;
-            xengnttab_seg->source.foreign.ref = seg->source.foreign.ref;
-            xengnttab_seg->source.foreign.offset =
-                seg->source.foreign.offset;
-            xengnttab_seg->dest.virt = seg->dest.virt;
-        }
-
-        xengnttab_seg->len = seg->len;
-    }
-
-    rc = xengnttab_grant_copy(xendev->gnttabdev, nr_segs, xengnttab_segs);
-
-    if (rc) {
-        xen_pv_printf(xendev, 0, "xengnttab_copy failed: %s\n",
-                      strerror(errno));
-    }
-
-    for (i = 0; i < nr_segs; i++) {
-        xengnttab_grant_copy_segment_t *xengnttab_seg =
-            &xengnttab_segs[i];
-
-        if (xengnttab_seg->status != GNTST_okay) {
-            xen_pv_printf(xendev, 0, "segment[%u] status: %d\n", i,
-                          xengnttab_seg->status);
-            rc = -1;
-        }
-    }
-
-    g_free(xengnttab_segs);
-    return rc;
-}
-
-/*
- * get xen backend device, allocate a new one if it doesn't exist.
- */
-static struct XenDevice *xen_be_get_xendev(const char *type, int dom, int dev,
-                                           struct XenDevOps *ops)
-{
-    struct XenDevice *xendev;
-
-    xendev = xen_pv_find_xendev(type, dom, dev);
-    if (xendev) {
-        return xendev;
-    }
-
-    /* init new xendev */
-    xendev = g_malloc0(ops->size);
-    object_initialize(&xendev->qdev, ops->size, TYPE_XENBACKEND);
-    OBJECT(xendev)->free = g_free;
-    qdev_set_parent_bus(DEVICE(xendev), xen_sysbus);
-    qdev_set_id(DEVICE(xendev), g_strdup_printf("xen-%s-%d", type, dev));
-    qdev_init_nofail(DEVICE(xendev));
-    object_unref(OBJECT(xendev));
-
-    xendev->type  = type;
-    xendev->dom   = dom;
-    xendev->dev   = dev;
-    xendev->ops   = ops;
-
-    snprintf(xendev->be, sizeof(xendev->be), "backend/%s/%d/%d",
-             xendev->type, xendev->dom, xendev->dev);
-    snprintf(xendev->name, sizeof(xendev->name), "%s-%d",
-             xendev->type, xendev->dev);
-
-    xendev->debug      = debug;
-    xendev->local_port = -1;
-
-    xendev->evtchndev = xenevtchn_open(NULL, 0);
-    if (xendev->evtchndev == NULL) {
-        xen_pv_printf(NULL, 0, "can't open evtchn device\n");
-        qdev_unplug(DEVICE(xendev), NULL);
-        return NULL;
-    }
-    qemu_set_cloexec(xenevtchn_fd(xendev->evtchndev));
-
-    xen_pv_insert_xendev(xendev);
-
-    if (xendev->ops->alloc) {
-        xendev->ops->alloc(xendev);
-    }
-
-    return xendev;
-}
-
-
-/*
- * Sync internal data structures on xenstore updates.
- * Node specifies the changed field.  node = NULL means
- * update all fields (used for initialization).
- */
-static void xen_be_backend_changed(struct XenDevice *xendev, const char *node)
-{
-    if (node == NULL  ||  strcmp(node, "online") == 0) {
-        if (xenstore_read_be_int(xendev, "online", &xendev->online) == -1) {
-            xendev->online = 0;
-        }
-    }
-
-    if (node) {
-        xen_pv_printf(xendev, 2, "backend update: %s\n", node);
-        if (xendev->ops->backend_changed) {
-            xendev->ops->backend_changed(xendev, node);
-        }
-    }
-}
-
-static void xen_be_frontend_changed(struct XenDevice *xendev, const char *node)
-{
-    int fe_state;
-
-    if (node == NULL  ||  strcmp(node, "state") == 0) {
-        if (xenstore_read_fe_int(xendev, "state", &fe_state) == -1) {
-            fe_state = XenbusStateUnknown;
-        }
-        if (xendev->fe_state != fe_state) {
-            xen_pv_printf(xendev, 1, "frontend state: %s -> %s\n",
-                          xenbus_strstate(xendev->fe_state),
-                          xenbus_strstate(fe_state));
-        }
-        xendev->fe_state = fe_state;
-    }
-    if (node == NULL  ||  strcmp(node, "protocol") == 0) {
-        g_free(xendev->protocol);
-        xendev->protocol = xenstore_read_fe_str(xendev, "protocol");
-        if (xendev->protocol) {
-            xen_pv_printf(xendev, 1, "frontend protocol: %s\n",
-                          xendev->protocol);
-        }
-    }
-
-    if (node) {
-        xen_pv_printf(xendev, 2, "frontend update: %s\n", node);
-        if (xendev->ops->frontend_changed) {
-            xendev->ops->frontend_changed(xendev, node);
-        }
-    }
-}
-
-/* ------------------------------------------------------------- */
-/* Check for possible state transitions and perform them.        */
-
-/*
- * Initial xendev setup.  Read frontend path, register watch for it.
- * Should succeed once xend finished setting up the backend device.
- *
- * Also sets initial state (-> Initializing) when done.  Which
- * only affects the xendev->be_state variable as xenbus should
- * already be put into that state by xend.
- */
-static int xen_be_try_setup(struct XenDevice *xendev)
-{
-    char token[XEN_BUFSIZE];
-    int be_state;
-
-    if (xenstore_read_be_int(xendev, "state", &be_state) == -1) {
-        xen_pv_printf(xendev, 0, "reading backend state failed\n");
-        return -1;
-    }
-
-    if (be_state != XenbusStateInitialising) {
-        xen_pv_printf(xendev, 0, "initial backend state is wrong (%s)\n",
-                      xenbus_strstate(be_state));
-        return -1;
-    }
-
-    xendev->fe = xenstore_read_be_str(xendev, "frontend");
-    if (xendev->fe == NULL) {
-        xen_pv_printf(xendev, 0, "reading frontend path failed\n");
-        return -1;
-    }
-
-    /* setup frontend watch */
-    snprintf(token, sizeof(token), "fe:%p", xendev);
-    if (!xs_watch(xenstore, xendev->fe, token)) {
-        xen_pv_printf(xendev, 0, "watching frontend path (%s) failed\n",
-                      xendev->fe);
-        return -1;
-    }
-    xen_be_set_state(xendev, XenbusStateInitialising);
-
-    xen_be_backend_changed(xendev, NULL);
-    xen_be_frontend_changed(xendev, NULL);
-    return 0;
-}
-
-/*
- * Try initialize xendev.  Prepare everything the backend can do
- * without synchronizing with the frontend.  Fakes hotplug-status.  No
- * hotplug involved here because this is about userspace drivers, thus
- * there are kernel backend devices which could invoke hotplug.
- *
- * Goes to InitWait on success.
- */
-static int xen_be_try_init(struct XenDevice *xendev)
-{
-    int rc = 0;
-
-    if (!xendev->online) {
-        xen_pv_printf(xendev, 1, "not online\n");
-        return -1;
-    }
-
-    if (xendev->ops->init) {
-        rc = xendev->ops->init(xendev);
-    }
-    if (rc != 0) {
-        xen_pv_printf(xendev, 1, "init() failed\n");
-        return rc;
-    }
-
-    xenstore_write_be_str(xendev, "hotplug-status", "connected");
-    xen_be_set_state(xendev, XenbusStateInitWait);
-    return 0;
-}
-
-/*
- * Try to initialise xendev.  Depends on the frontend being ready
- * for it (shared ring and evtchn info in xenstore, state being
- * Initialised or Connected).
- *
- * Goes to Connected on success.
- */
-static int xen_be_try_initialise(struct XenDevice *xendev)
-{
-    int rc = 0;
-
-    if (xendev->fe_state != XenbusStateInitialised  &&
-        xendev->fe_state != XenbusStateConnected) {
-        if (xendev->ops->flags & DEVOPS_FLAG_IGNORE_STATE) {
-            xen_pv_printf(xendev, 2, "frontend not ready, ignoring\n");
-        } else {
-            xen_pv_printf(xendev, 2, "frontend not ready (yet)\n");
-            return -1;
-        }
-    }
-
-    if (xendev->ops->flags & DEVOPS_FLAG_NEED_GNTDEV) {
-        xendev->gnttabdev = xengnttab_open(NULL, 0);
-        if (xendev->gnttabdev == NULL) {
-            xen_pv_printf(NULL, 0, "can't open gnttab device\n");
-            return -1;
-        }
-    } else {
-        xendev->gnttabdev = NULL;
-    }
-
-    if (xendev->ops->initialise) {
-        rc = xendev->ops->initialise(xendev);
-    }
-    if (rc != 0) {
-        xen_pv_printf(xendev, 0, "initialise() failed\n");
-        return rc;
-    }
-
-    xen_be_set_state(xendev, XenbusStateConnected);
-    return 0;
-}
-
-/*
- * Try to let xendev know that it is connected.  Depends on the
- * frontend being Connected.  Note that this may be called more
- * than once since the backend state is not modified.
- */
-static void xen_be_try_connected(struct XenDevice *xendev)
-{
-    if (!xendev->ops->connected) {
-        return;
-    }
-
-    if (xendev->fe_state != XenbusStateConnected) {
-        if (xendev->ops->flags & DEVOPS_FLAG_IGNORE_STATE) {
-            xen_pv_printf(xendev, 2, "frontend not ready, ignoring\n");
-        } else {
-            xen_pv_printf(xendev, 2, "frontend not ready (yet)\n");
-            return;
-        }
-    }
-
-    xendev->ops->connected(xendev);
-}
-
-/*
- * Teardown connection.
- *
- * Goes to Closed when done.
- */
-static void xen_be_disconnect(struct XenDevice *xendev, enum xenbus_state state)
-{
-    if (xendev->be_state != XenbusStateClosing &&
-        xendev->be_state != XenbusStateClosed  &&
-        xendev->ops->disconnect) {
-        xendev->ops->disconnect(xendev);
-    }
-    if (xendev->gnttabdev) {
-        xengnttab_close(xendev->gnttabdev);
-        xendev->gnttabdev = NULL;
-    }
-    if (xendev->be_state != state) {
-        xen_be_set_state(xendev, state);
-    }
-}
-
-/*
- * Try to reset xendev, for reconnection by another frontend instance.
- */
-static int xen_be_try_reset(struct XenDevice *xendev)
-{
-    if (xendev->fe_state != XenbusStateInitialising) {
-        return -1;
-    }
-
-    xen_pv_printf(xendev, 1, "device reset (for re-connect)\n");
-    xen_be_set_state(xendev, XenbusStateInitialising);
-    return 0;
-}
-
-/*
- * state change dispatcher function
- */
-void xen_be_check_state(struct XenDevice *xendev)
-{
-    int rc = 0;
-
-    /* frontend may request shutdown from almost anywhere */
-    if (xendev->fe_state == XenbusStateClosing ||
-        xendev->fe_state == XenbusStateClosed) {
-        xen_be_disconnect(xendev, xendev->fe_state);
-        return;
-    }
-
-    /* check for possible backend state transitions */
-    for (;;) {
-        switch (xendev->be_state) {
-        case XenbusStateUnknown:
-            rc = xen_be_try_setup(xendev);
-            break;
-        case XenbusStateInitialising:
-            rc = xen_be_try_init(xendev);
-            break;
-        case XenbusStateInitWait:
-            rc = xen_be_try_initialise(xendev);
-            break;
-        case XenbusStateConnected:
-            /* xendev->be_state doesn't change */
-            xen_be_try_connected(xendev);
-            rc = -1;
-            break;
-        case XenbusStateClosed:
-            rc = xen_be_try_reset(xendev);
-            break;
-        default:
-            rc = -1;
-        }
-        if (rc != 0) {
-            break;
-        }
-    }
-}
-
-/* ------------------------------------------------------------- */
-
-static int xenstore_scan(const char *type, int dom, struct XenDevOps *ops)
-{
-    struct XenDevice *xendev;
-    char path[XEN_BUFSIZE], token[XEN_BUFSIZE];
-    char **dev = NULL;
-    unsigned int cdev, j;
-
-    /* setup watch */
-    snprintf(token, sizeof(token), "be:%p:%d:%p", type, dom, ops);
-    snprintf(path, sizeof(path), "backend/%s/%d", type, dom);
-    if (!xs_watch(xenstore, path, token)) {
-        xen_pv_printf(NULL, 0, "xen be: watching backend path (%s) failed\n",
-                      path);
-        return -1;
-    }
-
-    /* look for backends */
-    dev = xs_directory(xenstore, 0, path, &cdev);
-    if (!dev) {
-        return 0;
-    }
-    for (j = 0; j < cdev; j++) {
-        xendev = xen_be_get_xendev(type, dom, atoi(dev[j]), ops);
-        if (xendev == NULL) {
-            continue;
-        }
-        xen_be_check_state(xendev);
-    }
-    free(dev);
-    return 0;
-}
-
-void xenstore_update_be(char *watch, char *type, int dom,
-                        struct XenDevOps *ops)
-{
-    struct XenDevice *xendev;
-    char path[XEN_BUFSIZE], *bepath;
-    unsigned int len, dev;
-
-    len = snprintf(path, sizeof(path), "backend/%s/%d", type, dom);
-    if (strncmp(path, watch, len) != 0) {
-        return;
-    }
-    if (sscanf(watch+len, "/%u/%255s", &dev, path) != 2) {
-        strcpy(path, "");
-        if (sscanf(watch+len, "/%u", &dev) != 1) {
-            dev = -1;
-        }
-    }
-    if (dev == -1) {
-        return;
-    }
-
-    xendev = xen_be_get_xendev(type, dom, dev, ops);
-    if (xendev != NULL) {
-        bepath = xs_read(xenstore, 0, xendev->be, &len);
-        if (bepath == NULL) {
-            xen_pv_del_xendev(xendev);
-        } else {
-            free(bepath);
-            xen_be_backend_changed(xendev, path);
-            xen_be_check_state(xendev);
-        }
-    }
-}
-
-void xenstore_update_fe(char *watch, struct XenDevice *xendev)
-{
-    char *node;
-    unsigned int len;
-
-    len = strlen(xendev->fe);
-    if (strncmp(xendev->fe, watch, len) != 0) {
-        return;
-    }
-    if (watch[len] != '/') {
-        return;
-    }
-    node = watch + len + 1;
-
-    xen_be_frontend_changed(xendev, node);
-    xen_be_check_state(xendev);
-}
-/* -------------------------------------------------------------------- */
-
-int xen_be_init(void)
-{
-    xengnttab_handle *gnttabdev;
-
-    xenstore = xs_daemon_open();
-    if (!xenstore) {
-        xen_pv_printf(NULL, 0, "can't connect to xenstored\n");
-        return -1;
-    }
-
-    qemu_set_fd_handler(xs_fileno(xenstore), xenstore_update, NULL, NULL);
-
-    if (xen_xc == NULL || xen_fmem == NULL) {
-        /* Check if xen_init() have been called */
-        goto err;
-    }
-
-    gnttabdev = xengnttab_open(NULL, 0);
-    if (gnttabdev != NULL) {
-        if (xengnttab_grant_copy(gnttabdev, 0, NULL) == 0) {
-            xen_feature_grant_copy = true;
-        }
-        xengnttab_close(gnttabdev);
-    }
-
-    xen_sysdev = qdev_create(NULL, TYPE_XENSYSDEV);
-    qdev_init_nofail(xen_sysdev);
-    xen_sysbus = qbus_create(TYPE_XENSYSBUS, DEVICE(xen_sysdev), "xen-sysbus");
-    qbus_set_bus_hotplug_handler(xen_sysbus, &error_abort);
-
-    return 0;
-
-err:
-    qemu_set_fd_handler(xs_fileno(xenstore), NULL, NULL, NULL);
-    xs_daemon_close(xenstore);
-    xenstore = NULL;
-
-    return -1;
-}
-
-static void xen_set_dynamic_sysbus(void)
-{
-    Object *machine = qdev_get_machine();
-    ObjectClass *oc = object_get_class(machine);
-    MachineClass *mc = MACHINE_CLASS(oc);
-
-    machine_class_allow_dynamic_sysbus_dev(mc, TYPE_XENSYSDEV);
-}
-
-int xen_be_register(const char *type, struct XenDevOps *ops)
-{
-    char path[50];
-    int rc;
-
-    if (ops->backend_register) {
-        rc = ops->backend_register();
-        if (rc) {
-            return rc;
-        }
-    }
-
-    snprintf(path, sizeof(path), "device-model/%u/backends/%s", xen_domid,
-             type);
-    xenstore_mkdir(path, XS_PERM_NONE);
-
-    return xenstore_scan(type, xen_domid, ops);
-}
-
-void xen_be_register_common(void)
-{
-    xen_set_dynamic_sysbus();
-
-    xen_be_register("console", &xen_console_ops);
-    xen_be_register("vkbd", &xen_kbdmouse_ops);
-    xen_be_register("qdisk", &xen_blkdev_ops);
-#ifdef CONFIG_VIRTFS
-    xen_be_register("9pfs", &xen_9pfs_ops);
-#endif
-#ifdef CONFIG_USB_LIBUSB
-    xen_be_register("qusb", &xen_usb_ops);
-#endif
-}
-
-int xen_be_bind_evtchn(struct XenDevice *xendev)
-{
-    if (xendev->local_port != -1) {
-        return 0;
-    }
-    xendev->local_port = xenevtchn_bind_interdomain
-        (xendev->evtchndev, xendev->dom, xendev->remote_port);
-    if (xendev->local_port == -1) {
-        xen_pv_printf(xendev, 0, "xenevtchn_bind_interdomain failed\n");
-        return -1;
-    }
-    xen_pv_printf(xendev, 2, "bind evtchn port %d\n", xendev->local_port);
-    qemu_set_fd_handler(xenevtchn_fd(xendev->evtchndev),
-                        xen_pv_evtchn_event, NULL, xendev);
-    return 0;
-}
-
-
-static Property xendev_properties[] = {
-    DEFINE_PROP_END_OF_LIST(),
-};
-
-static void xendev_class_init(ObjectClass *klass, void *data)
-{
-    DeviceClass *dc = DEVICE_CLASS(klass);
-
-    dc->props = xendev_properties;
-    set_bit(DEVICE_CATEGORY_MISC, dc->categories);
-    /* xen-backend devices can be plugged/unplugged dynamically */
-    dc->user_creatable = true;
-}
-
-static const TypeInfo xendev_type_info = {
-    .name          = TYPE_XENBACKEND,
-    .parent        = TYPE_XENSYSDEV,
-    .class_init    = xendev_class_init,
-    .instance_size = sizeof(struct XenDevice),
-};
-
-static void xen_sysbus_class_init(ObjectClass *klass, void *data)
-{
-    HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
-
-    hc->unplug = qdev_simple_device_unplug_cb;
-}
-
-static const TypeInfo xensysbus_info = {
-    .name       = TYPE_XENSYSBUS,
-    .parent     = TYPE_BUS,
-    .class_init = xen_sysbus_class_init,
-    .interfaces = (InterfaceInfo[]) {
-        { TYPE_HOTPLUG_HANDLER },
-        { }
-    }
-};
-
-static int xen_sysdev_init(SysBusDevice *dev)
-{
-    return 0;
-}
-
-static Property xen_sysdev_properties[] = {
-    {/* end of property list */},
-};
-
-static void xen_sysdev_class_init(ObjectClass *klass, void *data)
-{
-    DeviceClass *dc = DEVICE_CLASS(klass);
-    SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
-
-    k->init = xen_sysdev_init;
-    dc->props = xen_sysdev_properties;
-    dc->bus_type = TYPE_XENSYSBUS;
-}
-
-static const TypeInfo xensysdev_info = {
-    .name          = TYPE_XENSYSDEV,
-    .parent        = TYPE_SYS_BUS_DEVICE,
-    .instance_size = sizeof(SysBusDevice),
-    .class_init    = xen_sysdev_class_init,
-};
-
-static void xenbe_register_types(void)
-{
-    type_register_static(&xensysbus_info);
-    type_register_static(&xensysdev_info);
-    type_register_static(&xendev_type_info);
-}
-
-type_init(xenbe_register_types)
diff --git a/hw/xen/xen_devconfig.c b/hw/xen/xen_devconfig.c
index aebc19b..1b30bd7 100644
--- a/hw/xen/xen_devconfig.c
+++ b/hw/xen/xen_devconfig.c
@@ -1,5 +1,5 @@ 
 #include "qemu/osdep.h"
-#include "hw/xen/xen_backend.h"
+#include "hw/xen/xen-legacy-backend.h"
 #include "qemu/option.h"
 #include "sysemu/blockdev.h"
 
diff --git a/hw/xen/xen_pt.c b/hw/xen/xen_pt.c
index f1f3a37..b20bf3a 100644
--- a/hw/xen/xen_pt.c
+++ b/hw/xen/xen_pt.c
@@ -59,7 +59,7 @@ 
 #include "hw/pci/pci.h"
 #include "hw/xen/xen.h"
 #include "hw/i386/pc.h"
-#include "hw/xen/xen_backend.h"
+#include "hw/xen/xen-legacy-backend.h"
 #include "xen_pt.h"
 #include "qemu/range.h"
 #include "exec/address-spaces.h"
diff --git a/hw/xen/xen_pt_config_init.c b/hw/xen/xen_pt_config_init.c
index 47f9010..8111204 100644
--- a/hw/xen/xen_pt_config_init.c
+++ b/hw/xen/xen_pt_config_init.c
@@ -15,7 +15,7 @@ 
 #include "qemu/osdep.h"
 #include "qapi/error.h"
 #include "qemu/timer.h"
-#include "hw/xen/xen_backend.h"
+#include "hw/xen/xen-legacy-backend.h"
 #include "xen_pt.h"
 
 #define XEN_PT_MERGE_VALUE(value, data, val_mask) \
diff --git a/hw/xen/xen_pt_graphics.c b/hw/xen/xen_pt_graphics.c
index 135c8df..130cc6c 100644
--- a/hw/xen/xen_pt_graphics.c
+++ b/hw/xen/xen_pt_graphics.c
@@ -5,7 +5,7 @@ 
 #include "qapi/error.h"
 #include "xen_pt.h"
 #include "xen-host-pci-device.h"
-#include "hw/xen/xen_backend.h"
+#include "hw/xen/xen-legacy-backend.h"
 
 static unsigned long igd_guest_opregion;
 static unsigned long igd_host_opregion;
diff --git a/hw/xen/xen_pt_msi.c b/hw/xen/xen_pt_msi.c
index cc514f9..fb4b887 100644
--- a/hw/xen/xen_pt_msi.c
+++ b/hw/xen/xen_pt_msi.c
@@ -11,7 +11,7 @@ 
 
 #include "qemu/osdep.h"
 
-#include "hw/xen/xen_backend.h"
+#include "hw/xen/xen-legacy-backend.h"
 #include "xen_pt.h"
 #include "hw/i386/apic-msidef.h"
 
diff --git a/hw/xen/xen_pvdev.c b/hw/xen/xen_pvdev.c
index aed783e..61de091 100644
--- a/hw/xen/xen_pvdev.c
+++ b/hw/xen/xen_pvdev.c
@@ -20,7 +20,7 @@ 
 #include "qemu/osdep.h"
 #include "qemu/log.h"
 #include "hw/qdev-core.h"
-#include "hw/xen/xen_backend.h"
+#include "hw/xen/xen-legacy-backend.h"
 #include "hw/xen/xen_pvdev.h"
 
 /* private */
@@ -34,7 +34,7 @@  struct xs_dirs {
 static QTAILQ_HEAD(xs_dirs_head, xs_dirs) xs_cleanup =
     QTAILQ_HEAD_INITIALIZER(xs_cleanup);
 
-static QTAILQ_HEAD(XenDeviceHead, XenDevice) xendevs =
+static QTAILQ_HEAD(XenLegacyDeviceHead, XenLegacyDevice) xendevs =
     QTAILQ_HEAD_INITIALIZER(xendevs);
 
 /* ------------------------------------------------------------- */
@@ -195,7 +195,7 @@  const char *xenbus_strstate(enum xenbus_state state)
  *  2 == noisy debug messages (logfile only).
  *  3 == will flood your log (logfile only).
  */
-void xen_pv_printf(struct XenDevice *xendev, int msg_level,
+void xen_pv_printf(struct XenLegacyDevice *xendev, int msg_level,
                    const char *fmt, ...)
 {
     va_list args;
@@ -230,7 +230,7 @@  void xen_pv_printf(struct XenDevice *xendev, int msg_level,
 
 void xen_pv_evtchn_event(void *opaque)
 {
-    struct XenDevice *xendev = opaque;
+    struct XenLegacyDevice *xendev = opaque;
     evtchn_port_t port;
 
     port = xenevtchn_pending(xendev->evtchndev);
@@ -247,7 +247,7 @@  void xen_pv_evtchn_event(void *opaque)
     }
 }
 
-void xen_pv_unbind_evtchn(struct XenDevice *xendev)
+void xen_pv_unbind_evtchn(struct XenLegacyDevice *xendev)
 {
     if (xendev->local_port == -1) {
         return;
@@ -258,16 +258,16 @@  void xen_pv_unbind_evtchn(struct XenDevice *xendev)
     xendev->local_port = -1;
 }
 
-int xen_pv_send_notify(struct XenDevice *xendev)
+int xen_pv_send_notify(struct XenLegacyDevice *xendev)
 {
     return xenevtchn_notify(xendev->evtchndev, xendev->local_port);
 }
 
 /* ------------------------------------------------------------- */
 
-struct XenDevice *xen_pv_find_xendev(const char *type, int dom, int dev)
+struct XenLegacyDevice *xen_pv_find_xendev(const char *type, int dom, int dev)
 {
-    struct XenDevice *xendev;
+    struct XenLegacyDevice *xendev;
 
     QTAILQ_FOREACH(xendev, &xendevs, next) {
         if (xendev->dom != dom) {
@@ -287,7 +287,7 @@  struct XenDevice *xen_pv_find_xendev(const char *type, int dom, int dev)
 /*
  * release xen backend device.
  */
-void xen_pv_del_xendev(struct XenDevice *xendev)
+void xen_pv_del_xendev(struct XenLegacyDevice *xendev)
 {
     if (xendev->ops->free) {
         xendev->ops->free(xendev);
@@ -312,7 +312,7 @@  void xen_pv_del_xendev(struct XenDevice *xendev)
     qdev_unplug(&xendev->qdev, NULL);
 }
 
-void xen_pv_insert_xendev(struct XenDevice *xendev)
+void xen_pv_insert_xendev(struct XenLegacyDevice *xendev)
 {
     QTAILQ_INSERT_TAIL(&xendevs, xendev, next);
 }
diff --git a/hw/xenpv/xen_domainbuild.c b/hw/xenpv/xen_domainbuild.c
index 188acac..deb28cf 100644
--- a/hw/xenpv/xen_domainbuild.c
+++ b/hw/xenpv/xen_domainbuild.c
@@ -1,6 +1,6 @@ 
 #include "qemu/osdep.h"
 #include "qemu/units.h"
-#include "hw/xen/xen_backend.h"
+#include "hw/xen/xen-legacy-backend.h"
 #include "xen_domainbuild.h"
 #include "qemu/timer.h"
 #include "qemu/log.h"
diff --git a/hw/xenpv/xen_machine_pv.c b/hw/xenpv/xen_machine_pv.c
index 44d67b8..8c86fb7 100644
--- a/hw/xenpv/xen_machine_pv.c
+++ b/hw/xenpv/xen_machine_pv.c
@@ -26,7 +26,7 @@ 
 #include "qemu/error-report.h"
 #include "hw/hw.h"
 #include "hw/boards.h"
-#include "hw/xen/xen_backend.h"
+#include "hw/xen/xen-legacy-backend.h"
 #include "xen_domainbuild.h"
 #include "sysemu/block-backend.h"
 
diff --git a/include/hw/xen/xen-legacy-backend.h b/include/hw/xen/xen-legacy-backend.h
new file mode 100644
index 0000000..20cb47b
--- /dev/null
+++ b/include/hw/xen/xen-legacy-backend.h
@@ -0,0 +1,104 @@ 
+#ifndef QEMU_HW_XEN_BACKEND_H
+#define QEMU_HW_XEN_BACKEND_H
+
+#include "hw/xen/xen_common.h"
+#include "hw/xen/xen_pvdev.h"
+#include "sysemu/sysemu.h"
+#include "net/net.h"
+
+#define TYPE_XENSYSDEV "xen-sysdev"
+#define TYPE_XENSYSBUS "xen-sysbus"
+#define TYPE_XENBACKEND "xen-backend"
+
+#define XENBACKEND_DEVICE(obj) \
+    OBJECT_CHECK(XenLegacyDevice, (obj), TYPE_XENBACKEND)
+
+/* variables */
+extern struct xs_handle *xenstore;
+extern const char *xen_protocol;
+extern DeviceState *xen_sysdev;
+extern BusState *xen_sysbus;
+
+int xenstore_mkdir(char *path, int p);
+int xenstore_write_be_str(struct XenLegacyDevice *xendev, const char *node,
+                          const char *val);
+int xenstore_write_be_int(struct XenLegacyDevice *xendev, const char *node,
+                          int ival);
+int xenstore_write_be_int64(struct XenLegacyDevice *xendev, const char *node,
+                            int64_t ival);
+char *xenstore_read_be_str(struct XenLegacyDevice *xendev, const char *node);
+int xenstore_read_be_int(struct XenLegacyDevice *xendev, const char *node,
+                         int *ival);
+void xenstore_update_fe(char *watch, struct XenLegacyDevice *xendev);
+void xenstore_update_be(char *watch, char *type, int dom,
+                        struct XenDevOps *ops);
+char *xenstore_read_fe_str(struct XenLegacyDevice *xendev, const char *node);
+int xenstore_read_fe_int(struct XenLegacyDevice *xendev, const char *node,
+                         int *ival);
+int xenstore_read_fe_uint64(struct XenLegacyDevice *xendev, const char *node,
+                            uint64_t *uval);
+
+void xen_be_check_state(struct XenLegacyDevice *xendev);
+
+/* xen backend driver bits */
+int xen_be_init(void);
+void xen_be_register_common(void);
+int xen_be_register(const char *type, struct XenDevOps *ops);
+int xen_be_set_state(struct XenLegacyDevice *xendev, enum xenbus_state state);
+int xen_be_bind_evtchn(struct XenLegacyDevice *xendev);
+void xen_be_set_max_grant_refs(struct XenLegacyDevice *xendev,
+                               unsigned int nr_refs);
+void *xen_be_map_grant_refs(struct XenLegacyDevice *xendev, uint32_t *refs,
+                            unsigned int nr_refs, int prot);
+void xen_be_unmap_grant_refs(struct XenLegacyDevice *xendev, void *ptr,
+                             unsigned int nr_refs);
+
+typedef struct XenGrantCopySegment {
+    union {
+        void *virt;
+        struct {
+            uint32_t ref;
+            off_t offset;
+        } foreign;
+    } source, dest;
+    size_t len;
+} XenGrantCopySegment;
+
+int xen_be_copy_grant_refs(struct XenLegacyDevice *xendev,
+                           bool to_domain, XenGrantCopySegment segs[],
+                           unsigned int nr_segs);
+
+static inline void *xen_be_map_grant_ref(struct XenLegacyDevice *xendev,
+                                         uint32_t ref, int prot)
+{
+    return xen_be_map_grant_refs(xendev, &ref, 1, prot);
+}
+
+static inline void xen_be_unmap_grant_ref(struct XenLegacyDevice *xendev,
+                                          void *ptr)
+{
+    return xen_be_unmap_grant_refs(xendev, ptr, 1);
+}
+
+/* actual backend drivers */
+extern struct XenDevOps xen_console_ops;      /* xen_console.c     */
+extern struct XenDevOps xen_kbdmouse_ops;     /* xen_framebuffer.c */
+extern struct XenDevOps xen_framebuffer_ops;  /* xen_framebuffer.c */
+extern struct XenDevOps xen_blkdev_ops;       /* xen_disk.c        */
+#ifdef CONFIG_VIRTFS
+extern struct XenDevOps xen_9pfs_ops;       /* xen-9p-backend.c        */
+#endif
+extern struct XenDevOps xen_netdev_ops;       /* xen_nic.c         */
+#ifdef CONFIG_USB_LIBUSB
+extern struct XenDevOps xen_usb_ops;          /* xen-usb.c         */
+#endif
+
+/* configuration (aka xenbus setup) */
+void xen_config_cleanup(void);
+int xen_config_dev_blk(DriveInfo *disk);
+int xen_config_dev_nic(NICInfo *nic);
+int xen_config_dev_vfb(int vdev, const char *type);
+int xen_config_dev_vkbd(int vdev);
+int xen_config_dev_console(int vdev);
+
+#endif /* QEMU_HW_XEN_BACKEND_H */
diff --git a/include/hw/xen/xen_backend.h b/include/hw/xen/xen_backend.h
deleted file mode 100644
index 9c17fdd..0000000
--- a/include/hw/xen/xen_backend.h
+++ /dev/null
@@ -1,99 +0,0 @@ 
-#ifndef QEMU_HW_XEN_BACKEND_H
-#define QEMU_HW_XEN_BACKEND_H
-
-#include "hw/xen/xen_common.h"
-#include "hw/xen/xen_pvdev.h"
-#include "sysemu/sysemu.h"
-#include "net/net.h"
-
-#define TYPE_XENSYSDEV "xen-sysdev"
-#define TYPE_XENSYSBUS "xen-sysbus"
-#define TYPE_XENBACKEND "xen-backend"
-
-#define XENBACKEND_DEVICE(obj) \
-    OBJECT_CHECK(XenDevice, (obj), TYPE_XENBACKEND)
-
-/* variables */
-extern struct xs_handle *xenstore;
-extern const char *xen_protocol;
-extern DeviceState *xen_sysdev;
-extern BusState *xen_sysbus;
-
-int xenstore_mkdir(char *path, int p);
-int xenstore_write_be_str(struct XenDevice *xendev, const char *node, const char *val);
-int xenstore_write_be_int(struct XenDevice *xendev, const char *node, int ival);
-int xenstore_write_be_int64(struct XenDevice *xendev, const char *node, int64_t ival);
-char *xenstore_read_be_str(struct XenDevice *xendev, const char *node);
-int xenstore_read_be_int(struct XenDevice *xendev, const char *node, int *ival);
-void xenstore_update_fe(char *watch, struct XenDevice *xendev);
-void xenstore_update_be(char *watch, char *type, int dom,
-                        struct XenDevOps *ops);
-char *xenstore_read_fe_str(struct XenDevice *xendev, const char *node);
-int xenstore_read_fe_int(struct XenDevice *xendev, const char *node, int *ival);
-int xenstore_read_fe_uint64(struct XenDevice *xendev, const char *node,
-                            uint64_t *uval);
-
-void xen_be_check_state(struct XenDevice *xendev);
-
-/* xen backend driver bits */
-int xen_be_init(void);
-void xen_be_register_common(void);
-int xen_be_register(const char *type, struct XenDevOps *ops);
-int xen_be_set_state(struct XenDevice *xendev, enum xenbus_state state);
-int xen_be_bind_evtchn(struct XenDevice *xendev);
-void xen_be_set_max_grant_refs(struct XenDevice *xendev,
-                               unsigned int nr_refs);
-void *xen_be_map_grant_refs(struct XenDevice *xendev, uint32_t *refs,
-                            unsigned int nr_refs, int prot);
-void xen_be_unmap_grant_refs(struct XenDevice *xendev, void *ptr,
-                             unsigned int nr_refs);
-
-typedef struct XenGrantCopySegment {
-    union {
-        void *virt;
-        struct {
-            uint32_t ref;
-            off_t offset;
-        } foreign;
-    } source, dest;
-    size_t len;
-} XenGrantCopySegment;
-
-int xen_be_copy_grant_refs(struct XenDevice *xendev,
-                           bool to_domain, XenGrantCopySegment segs[],
-                           unsigned int nr_segs);
-
-static inline void *xen_be_map_grant_ref(struct XenDevice *xendev,
-                                         uint32_t ref, int prot)
-{
-    return xen_be_map_grant_refs(xendev, &ref, 1, prot);
-}
-
-static inline void xen_be_unmap_grant_ref(struct XenDevice *xendev,
-                                          void *ptr)
-{
-    return xen_be_unmap_grant_refs(xendev, ptr, 1);
-}
-
-/* actual backend drivers */
-extern struct XenDevOps xen_console_ops;      /* xen_console.c     */
-extern struct XenDevOps xen_kbdmouse_ops;     /* xen_framebuffer.c */
-extern struct XenDevOps xen_framebuffer_ops;  /* xen_framebuffer.c */
-extern struct XenDevOps xen_blkdev_ops;       /* xen_disk.c        */
-#ifdef CONFIG_VIRTFS
-extern struct XenDevOps xen_9pfs_ops;       /* xen-9p-backend.c        */
-#endif
-extern struct XenDevOps xen_netdev_ops;       /* xen_nic.c         */
-#ifdef CONFIG_USB_LIBUSB
-extern struct XenDevOps xen_usb_ops;          /* xen-usb.c         */
-#endif
-
-/* configuration (aka xenbus setup) */
-void xen_config_cleanup(void);
-int xen_config_dev_blk(DriveInfo *disk);
-int xen_config_dev_nic(NICInfo *nic);
-int xen_config_dev_vfb(int vdev, const char *type);
-int xen_config_dev_vkbd(int vdev);
-int xen_config_dev_console(int vdev);
-
-#endif /* QEMU_HW_XEN_BACKEND_H */
diff --git a/include/hw/xen/xen_pvdev.h b/include/hw/xen/xen_pvdev.h
index d473e9b..83e5174 100644
--- a/include/hw/xen/xen_pvdev.h
+++ b/include/hw/xen/xen_pvdev.h
@@ -6,7 +6,7 @@ 
 
 #define XEN_BUFSIZE 1024
 
-struct XenDevice;
+struct XenLegacyDevice;
 
 /* driver uses grant tables  ->  open gntdev device (xendev->gnttabdev) */
 #define DEVOPS_FLAG_NEED_GNTDEV   1
@@ -16,19 +16,21 @@  struct XenDevice;
 struct XenDevOps {
     size_t    size;
     uint32_t  flags;
-    void      (*alloc)(struct XenDevice *xendev);
-    int       (*init)(struct XenDevice *xendev);
-    int       (*initialise)(struct XenDevice *xendev);
-    void      (*connected)(struct XenDevice *xendev);
-    void      (*event)(struct XenDevice *xendev);
-    void      (*disconnect)(struct XenDevice *xendev);
-    int       (*free)(struct XenDevice *xendev);
-    void      (*backend_changed)(struct XenDevice *xendev, const char *node);
-    void      (*frontend_changed)(struct XenDevice *xendev, const char *node);
+    void      (*alloc)(struct XenLegacyDevice *xendev);
+    int       (*init)(struct XenLegacyDevice *xendev);
+    int       (*initialise)(struct XenLegacyDevice *xendev);
+    void      (*connected)(struct XenLegacyDevice *xendev);
+    void      (*event)(struct XenLegacyDevice *xendev);
+    void      (*disconnect)(struct XenLegacyDevice *xendev);
+    int       (*free)(struct XenLegacyDevice *xendev);
+    void      (*backend_changed)(struct XenLegacyDevice *xendev,
+                                 const char *node);
+    void      (*frontend_changed)(struct XenLegacyDevice *xendev,
+                                  const char *node);
     int       (*backend_register)(void);
 };
 
-struct XenDevice {
+struct XenLegacyDevice {
     DeviceState        qdev;
     const char         *type;
     int                dom;
@@ -49,7 +51,7 @@  struct XenDevice {
     xengnttab_handle   *gnttabdev;
 
     struct XenDevOps   *ops;
-    QTAILQ_ENTRY(XenDevice) next;
+    QTAILQ_ENTRY(XenLegacyDevice) next;
 };
 
 /* ------------------------------------------------------------- */
@@ -66,14 +68,14 @@  void xenstore_update(void *unused);
 const char *xenbus_strstate(enum xenbus_state state);
 
 void xen_pv_evtchn_event(void *opaque);
-void xen_pv_insert_xendev(struct XenDevice *xendev);
-void xen_pv_del_xendev(struct XenDevice *xendev);
-struct XenDevice *xen_pv_find_xendev(const char *type, int dom, int dev);
+void xen_pv_insert_xendev(struct XenLegacyDevice *xendev);
+void xen_pv_del_xendev(struct XenLegacyDevice *xendev);
+struct XenLegacyDevice *xen_pv_find_xendev(const char *type, int dom, int dev);
 
-void xen_pv_unbind_evtchn(struct XenDevice *xendev);
-int xen_pv_send_notify(struct XenDevice *xendev);
+void xen_pv_unbind_evtchn(struct XenLegacyDevice *xendev);
+int xen_pv_send_notify(struct XenLegacyDevice *xendev);
 
-void xen_pv_printf(struct XenDevice *xendev, int msg_level,
+void xen_pv_printf(struct XenLegacyDevice *xendev, int msg_level,
                    const char *fmt, ...)  GCC_FMT_ATTR(3, 4);
 
 #endif /* QEMU_HW_XEN_PVDEV_H */