diff --git a/hw/ac97.c b/hw/ac97.c
index 52f0f0dd954765281eb7d169c0fcd327c17c3eb1..541d9a4b97f321650effaa9b81b3e122f49eb19a 100644
--- a/hw/ac97.c
+++ b/hw/ac97.c
@@ -1316,9 +1316,8 @@ static int ac97_initfn (PCIDevice *dev)
 
     memory_region_init_io (&s->io_nam, &ac97_io_nam_ops, s, "ac97-nam", 1024);
     memory_region_init_io (&s->io_nabm, &ac97_io_nabm_ops, s, "ac97-nabm", 256);
-    pci_register_bar_region (&s->dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &s->io_nam);
-    pci_register_bar_region (&s->dev, 1, PCI_BASE_ADDRESS_SPACE_IO,
-                             &s->io_nabm);
+    pci_register_bar (&s->dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &s->io_nam);
+    pci_register_bar (&s->dev, 1, PCI_BASE_ADDRESS_SPACE_IO, &s->io_nabm);
     qemu_register_reset (ac97_on_reset, s);
     AUD_register_card ("ac97", &s->card);
     ac97_on_reset (s);
diff --git a/hw/cirrus_vga.c b/hw/cirrus_vga.c
index c9887ac3b0e58a22f628a8a9620069f21b05521c..b48930994a3c3f8d107323f0b074617436ad79e2 100644
--- a/hw/cirrus_vga.c
+++ b/hw/cirrus_vga.c
@@ -2948,10 +2948,9 @@ static int pci_cirrus_vga_initfn(PCIDevice *dev)
      /* memory #0 LFB */
      /* memory #1 memory-mapped I/O */
      /* XXX: s->vga.vram_size must be a power of two */
-     pci_register_bar_region(&d->dev, 0, PCI_BASE_ADDRESS_MEM_PREFETCH,
-                             &s->pci_bar);
+     pci_register_bar(&d->dev, 0, PCI_BASE_ADDRESS_MEM_PREFETCH, &s->pci_bar);
      if (device_id == CIRRUS_ID_CLGD5446) {
-         pci_register_bar_region(&d->dev, 1, 0, &s->cirrus_mmio_io);
+         pci_register_bar(&d->dev, 1, 0, &s->cirrus_mmio_io);
      }
      return 0;
 }
diff --git a/hw/e1000.c b/hw/e1000.c
index dfc082bc612cf3a8521158185f6fc98a9fb7e3d6..29b453f7b122422def5099fd2611f72d7bb9511a 100644
--- a/hw/e1000.c
+++ b/hw/e1000.c
@@ -1158,10 +1158,9 @@ static int pci_e1000_init(PCIDevice *pci_dev)
 
     e1000_mmio_setup(d);
 
-    pci_register_bar_region(&d->dev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY,
-                            &d->mmio);
+    pci_register_bar(&d->dev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY, &d->mmio);
 
-    pci_register_bar_region(&d->dev, 1, PCI_BASE_ADDRESS_SPACE_IO, &d->io);
+    pci_register_bar(&d->dev, 1, PCI_BASE_ADDRESS_SPACE_IO, &d->io);
 
     memmove(d->eeprom_data, e1000_eeprom_template,
         sizeof e1000_eeprom_template);
diff --git a/hw/eepro100.c b/hw/eepro100.c
index 04723f3420e2c20d44cd814171aeead4afde7a1a..a636d309bef74b6d31908cca111460c43695bce4 100644
--- a/hw/eepro100.c
+++ b/hw/eepro100.c
@@ -1879,15 +1879,14 @@ static int e100_nic_init(PCIDevice *pci_dev)
     /* Handler for memory-mapped I/O */
     memory_region_init_io(&s->mmio_bar, &eepro100_ops, s, "eepro100-mmio",
                           PCI_MEM_SIZE);
-    pci_register_bar_region(&s->dev, 0, PCI_BASE_ADDRESS_MEM_PREFETCH,
-                            &s->mmio_bar);
+    pci_register_bar(&s->dev, 0, PCI_BASE_ADDRESS_MEM_PREFETCH, &s->mmio_bar);
     memory_region_init_io(&s->io_bar, &eepro100_ops, s, "eepro100-io",
                           PCI_IO_SIZE);
-    pci_register_bar_region(&s->dev, 1, PCI_BASE_ADDRESS_SPACE_IO, &s->io_bar);
+    pci_register_bar(&s->dev, 1, PCI_BASE_ADDRESS_SPACE_IO, &s->io_bar);
     /* FIXME: flash aliases to mmio?! */
     memory_region_init_io(&s->flash_bar, &eepro100_ops, s, "eepro100-flash",
                           PCI_FLASH_SIZE);
-    pci_register_bar_region(&s->dev, 2, 0, &s->flash_bar);
+    pci_register_bar(&s->dev, 2, 0, &s->flash_bar);
 
     qemu_macaddr_default_if_unset(&s->conf.macaddr);
     logout("macaddr: %s\n", nic_dump(&s->conf.macaddr.a[0], 6));
diff --git a/hw/es1370.c b/hw/es1370.c
index 4e43c4a13a333061be2d4d78e292e851d078f844..a9387d15cc25597321e0555e4c815a34a79674a4 100644
--- a/hw/es1370.c
+++ b/hw/es1370.c
@@ -1009,7 +1009,7 @@ static int es1370_initfn (PCIDevice *dev)
     c[PCI_MAX_LAT] = 0x80;
 
     memory_region_init_io (&s->io, &es1370_io_ops, s, "es1370", 256);
-    pci_register_bar_region (&s->dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &s->io);
+    pci_register_bar (&s->dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &s->io);
     qemu_register_reset (es1370_on_reset, s);
 
     AUD_register_card ("es1370", &s->card);
diff --git a/hw/ide/cmd646.c b/hw/ide/cmd646.c
index 13e6f2ff9166f52c14376893fb9c3a2c82228a5a..4d91e2c6429ea6b66b1c63b2bf0deed15919f117 100644
--- a/hw/ide/cmd646.c
+++ b/hw/ide/cmd646.c
@@ -270,16 +270,12 @@ static int pci_cmd646_ide_initfn(PCIDevice *dev)
 
     setup_cmd646_bar(d, 0);
     setup_cmd646_bar(d, 1);
-    pci_register_bar_region(dev, 0, PCI_BASE_ADDRESS_SPACE_IO,
-                            &d->cmd646_bar[0].data);
-    pci_register_bar_region(dev, 1, PCI_BASE_ADDRESS_SPACE_IO,
-                            &d->cmd646_bar[0].cmd);
-    pci_register_bar_region(dev, 2, PCI_BASE_ADDRESS_SPACE_IO,
-                            &d->cmd646_bar[1].data);
-    pci_register_bar_region(dev, 3, PCI_BASE_ADDRESS_SPACE_IO,
-                            &d->cmd646_bar[1].cmd);
+    pci_register_bar(dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &d->cmd646_bar[0].data);
+    pci_register_bar(dev, 1, PCI_BASE_ADDRESS_SPACE_IO, &d->cmd646_bar[0].cmd);
+    pci_register_bar(dev, 2, PCI_BASE_ADDRESS_SPACE_IO, &d->cmd646_bar[1].data);
+    pci_register_bar(dev, 3, PCI_BASE_ADDRESS_SPACE_IO, &d->cmd646_bar[1].cmd);
     bmdma_setup_bar(d);
-    pci_register_bar_region(dev, 4, PCI_BASE_ADDRESS_SPACE_IO, &d->bmdma_bar);
+    pci_register_bar(dev, 4, PCI_BASE_ADDRESS_SPACE_IO, &d->bmdma_bar);
 
     /* TODO: RST# value should be 0 */
     pci_conf[PCI_INTERRUPT_PIN] = 0x01; // interrupt on pin 1
diff --git a/hw/ide/ich.c b/hw/ide/ich.c
index 698b5f60bd7ba49e42ce1b722f18a4f1b32ace15..5278bc4d6cbd8d7939f19b7113a84259ebcdd60b 100644
--- a/hw/ide/ich.c
+++ b/hw/ide/ich.c
@@ -98,7 +98,7 @@ static int pci_ich9_ahci_init(PCIDevice *dev)
     msi_init(dev, 0x50, 1, true, false);
     d->ahci.irq = d->card.irq[0];
 
-    pci_register_bar_region(&d->card, 5, 0, &d->ahci.mem);
+    pci_register_bar(&d->card, 5, 0, &d->ahci.mem);
 
     return 0;
 }
diff --git a/hw/ide/piix.c b/hw/ide/piix.c
index 5aa0a303659dca51345131062943f95379a4df40..8525336075a7f7b1af3642596ea1e37842bed80f 100644
--- a/hw/ide/piix.c
+++ b/hw/ide/piix.c
@@ -155,8 +155,7 @@ static int pci_piix_ide_initfn(PCIDevice *dev)
     qemu_register_reset(piix3_reset, d);
 
     bmdma_setup_bar(d);
-    pci_register_bar_region(&d->dev, 4, PCI_BASE_ADDRESS_SPACE_IO,
-                            &d->bmdma_bar);
+    pci_register_bar(&d->dev, 4, PCI_BASE_ADDRESS_SPACE_IO, &d->bmdma_bar);
 
     vmstate_register(&d->dev.qdev, 0, &vmstate_ide_pci, d);
 
diff --git a/hw/ide/via.c b/hw/ide/via.c
index eb6a4095a3cc819c450f4948d71aeb4cb4f3aeca..c0b9d43827158636f3016201bff7979f70052e4f 100644
--- a/hw/ide/via.c
+++ b/hw/ide/via.c
@@ -180,8 +180,7 @@ static int vt82c686b_ide_initfn(PCIDevice *dev)
 
     qemu_register_reset(via_reset, d);
     bmdma_setup_bar(d);
-    pci_register_bar_region(&d->dev, 4, PCI_BASE_ADDRESS_SPACE_IO,
-                            &d->bmdma_bar);
+    pci_register_bar(&d->dev, 4, PCI_BASE_ADDRESS_SPACE_IO, &d->bmdma_bar);
 
     vmstate_register(&dev->qdev, 0, &vmstate_ide_pci, d);
 
diff --git a/hw/intel-hda.c b/hw/intel-hda.c
index 1e4c71e10ec11dcf98361833e427bb0f0dc29af7..fa56a922152f2c2a363d42983f1931d732797677 100644
--- a/hw/intel-hda.c
+++ b/hw/intel-hda.c
@@ -1136,7 +1136,7 @@ static int intel_hda_init(PCIDevice *pci)
 
     memory_region_init_io(&d->mmio, &intel_hda_mmio_ops, d,
                           "intel-hda", 0x4000);
-    pci_register_bar_region(&d->pci, 0, 0, &d->mmio);
+    pci_register_bar(&d->pci, 0, 0, &d->mmio);
     if (d->msi) {
         msi_init(&d->pci, 0x50, 1, true, false);
     }
diff --git a/hw/ivshmem.c b/hw/ivshmem.c
index bacba604d7b8e955c643dd6acfba1ae6e9a2714f..42a58770320cfcb88e21142c8ff96458fc98477f 100644
--- a/hw/ivshmem.c
+++ b/hw/ivshmem.c
@@ -336,7 +336,7 @@ static void create_shared_memory_BAR(IVShmemState *s, int fd) {
     memory_region_add_subregion(&s->bar, 0, &s->ivshmem);
 
     /* region for shared memory */
-    pci_register_bar_region(&s->dev, 2, PCI_BASE_ADDRESS_SPACE_MEMORY, &s->bar);
+    pci_register_bar(&s->dev, 2, PCI_BASE_ADDRESS_SPACE_MEMORY, &s->bar);
 }
 
 static void close_guest_eventfds(IVShmemState *s, int posn)
@@ -543,9 +543,8 @@ static void ivshmem_setup_msi(IVShmemState * s) {
 
     memory_region_init(&s->msix_bar, "ivshmem-msix", 4096);
     if (!msix_init(&s->dev, s->vectors, &s->msix_bar, 1, 0)) {
-        pci_register_bar_region(&s->dev, 1,
-                                PCI_BASE_ADDRESS_SPACE_MEMORY,
-                                &s->msix_bar);
+        pci_register_bar(&s->dev, 1, PCI_BASE_ADDRESS_SPACE_MEMORY,
+                         &s->msix_bar);
         IVSHMEM_DPRINTF("msix initialized (%d vectors)\n", s->vectors);
     } else {
         IVSHMEM_DPRINTF("msix initialization failed\n");
@@ -665,8 +664,8 @@ static int pci_ivshmem_init(PCIDevice *dev)
     }
 
     /* region for registers*/
-    pci_register_bar_region(&s->dev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY,
-                            &s->ivshmem_mmio);
+    pci_register_bar(&s->dev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY,
+                     &s->ivshmem_mmio);
 
     memory_region_init(&s->bar, "ivshmem-bar2-container", s->ivshmem_size);
 
@@ -694,8 +693,8 @@ static int pci_ivshmem_init(PCIDevice *dev)
         /* allocate/initialize space for interrupt handling */
         s->peers = qemu_mallocz(s->nb_peers * sizeof(Peer));
 
-        pci_register_bar_region(&s->dev, 2,
-                                PCI_BASE_ADDRESS_SPACE_MEMORY, &s->ivshmem);
+        pci_register_bar(&s->dev, 2,
+                         PCI_BASE_ADDRESS_SPACE_MEMORY, &s->ivshmem);
 
         s->eventfd_chr = qemu_mallocz(s->vectors * sizeof(CharDriverState *));
 
diff --git a/hw/lsi53c895a.c b/hw/lsi53c895a.c
index 0ab8c78137fe4e73d4f95be818c34e0d2ddc5b2a..d067a0227e11e6b7b5d9f760abc55f833e58fae8 100644
--- a/hw/lsi53c895a.c
+++ b/hw/lsi53c895a.c
@@ -2118,10 +2118,9 @@ static int lsi_scsi_init(PCIDevice *dev)
     memory_region_init_io(&s->ram_io, &lsi_ram_ops, s, "lsi-ram", 0x2000);
     memory_region_init_io(&s->io_io, &lsi_io_ops, s, "lsi-io", 256);
 
-    pci_register_bar_region(&s->dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &s->io_io);
-    pci_register_bar_region(&s->dev, 1, 0, &s->mmio_io);
-    pci_register_bar_region(&s->dev, 2, PCI_BASE_ADDRESS_SPACE_MEMORY,
-                            &s->ram_io);
+    pci_register_bar(&s->dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &s->io_io);
+    pci_register_bar(&s->dev, 1, 0, &s->mmio_io);
+    pci_register_bar(&s->dev, 2, PCI_BASE_ADDRESS_SPACE_MEMORY, &s->ram_io);
     QTAILQ_INIT(&s->queue);
 
     scsi_bus_new(&s->bus, &dev->qdev, 1, LSI_MAX_DEVS, &lsi_scsi_ops);
diff --git a/hw/macio.c b/hw/macio.c
index 71fa2a8b8dad0d37eb6237ab18f5833acb18fc37..cc6ae400505e84ee9b3f8030c07ce0cf78aa084f 100644
--- a/hw/macio.c
+++ b/hw/macio.c
@@ -111,6 +111,5 @@ void macio_init (PCIBus *bus, int device_id, int is_oldworld,
     d->config[0x3d] = 0x01; // interrupt on pin 1
 
     macio_bar_setup(macio_state);
-    pci_register_bar_region(d, 0, PCI_BASE_ADDRESS_SPACE_MEMORY,
-                            &macio_state->bar);
+    pci_register_bar(d, 0, PCI_BASE_ADDRESS_SPACE_MEMORY, &macio_state->bar);
 }
diff --git a/hw/ne2000.c b/hw/ne2000.c
index 5b76acfb34ca164a3e444c6e3562d74d7fde2116..a035a852441a65ad664b8034fcc13bc12dda5090 100644
--- a/hw/ne2000.c
+++ b/hw/ne2000.c
@@ -754,7 +754,7 @@ static int pci_ne2000_init(PCIDevice *pci_dev)
 
     s = &d->ne2000;
     ne2000_setup_io(s, 0x100);
-    pci_register_bar_region(&d->dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &s->io);
+    pci_register_bar(&d->dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &s->io);
     s->irq = d->dev.irq[0];
 
     qemu_macaddr_default_if_unset(&s->c.macaddr);
diff --git a/hw/openpic.c b/hw/openpic.c
index c2b04a3bb08ecff62f8fae7d59fea27ad34f971c..ccd4a14f817bfaa44c6a8233fe0b217bd2d47df3 100644
--- a/hw/openpic.c
+++ b/hw/openpic.c
@@ -1177,8 +1177,8 @@ qemu_irq *openpic_init (PCIBus *bus, MemoryRegion **pmem, int nb_cpus,
 #endif
 
         /* Register I/O spaces */
-        pci_register_bar_region(&opp->pci_dev, 0,
-                                PCI_BASE_ADDRESS_SPACE_MEMORY, &opp->mem);
+        pci_register_bar(&opp->pci_dev, 0,
+                         PCI_BASE_ADDRESS_SPACE_MEMORY, &opp->mem);
     } else {
         opp = qemu_mallocz(sizeof(openpic_t));
         memory_region_init_io(&opp->mem, &openpic_ops, opp, "openpic", 0x40000);
diff --git a/hw/pci.c b/hw/pci.c
index aa17395f7be5bf293430999f10d2c6a0d6f74c45..6547d2bcc2a9db97eb28fa1dcf31f13584bb8cbd 100644
--- a/hw/pci.c
+++ b/hw/pci.c
@@ -881,8 +881,8 @@ static int pci_unregister_device(DeviceState *dev)
     return 0;
 }
 
-void pci_register_bar_region(PCIDevice *pci_dev, int region_num,
-                             uint8_t type, MemoryRegion *memory)
+void pci_register_bar(PCIDevice *pci_dev, int region_num,
+                      uint8_t type, MemoryRegion *memory)
 {
     PCIIORegion *r;
     uint32_t addr;
@@ -1956,7 +1956,7 @@ static int pci_add_option_rom(PCIDevice *pdev, bool is_default_rom)
 
     qemu_put_ram_ptr(ptr);
 
-    pci_register_bar_region(pdev, PCI_ROM_SLOT, 0, &pdev->rom);
+    pci_register_bar(pdev, PCI_ROM_SLOT, 0, &pdev->rom);
 
     return 0;
 }
diff --git a/hw/pci.h b/hw/pci.h
index 8d1662a20ddacc563cd36aa7bd771d91a5ed8083..d7ad7fb95fe0cad29d03e762e148f307dfeac5c4 100644
--- a/hw/pci.h
+++ b/hw/pci.h
@@ -200,8 +200,8 @@ PCIDevice *pci_register_device(PCIBus *bus, const char *name,
                                PCIConfigReadFunc *config_read,
                                PCIConfigWriteFunc *config_write);
 
-void pci_register_bar_region(PCIDevice *pci_dev, int region_num,
-                             uint8_t attr, MemoryRegion *memory);
+void pci_register_bar(PCIDevice *pci_dev, int region_num,
+                      uint8_t attr, MemoryRegion *memory);
 pcibus_t pci_get_bar_addr(PCIDevice *pci_dev, int region_num);
 
 int pci_add_capability(PCIDevice *pdev, uint8_t cap_id,
diff --git a/hw/pcnet-pci.c b/hw/pcnet-pci.c
index a25f5650964baf614dc1e86cbe1d924c09b9db41..13d9380b006a66ac51058267baa3be36be32fe8b 100644
--- a/hw/pcnet-pci.c
+++ b/hw/pcnet-pci.c
@@ -295,9 +295,9 @@ static int pci_pcnet_init(PCIDevice *pci_dev)
 
     memory_region_init_io(&d->io_bar, &pcnet_io_ops, d, "pcnet-io",
                           PCNET_IOPORT_SIZE);
-    pci_register_bar_region(pci_dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &d->io_bar);
+    pci_register_bar(pci_dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &d->io_bar);
 
-    pci_register_bar_region(pci_dev, 1, 0, &s->mmio);
+    pci_register_bar(pci_dev, 1, 0, &s->mmio);
 
     s->irq = pci_dev->irq[0];
     s->phys_mem_read = pci_physical_memory_read;
diff --git a/hw/qxl.c b/hw/qxl.c
index 17c5fc72a5a93479472d5de4f43167c5431302c3..db7ae7a8ff6300b7d496ee7b75e4055ac6e37910 100644
--- a/hw/qxl.c
+++ b/hw/qxl.c
@@ -1564,17 +1564,17 @@ static int qxl_init_common(PCIQXLDevice *qxl)
     }
 
 
-    pci_register_bar_region(&qxl->pci, QXL_IO_RANGE_INDEX,
-                            PCI_BASE_ADDRESS_SPACE_IO, &qxl->io_bar);
+    pci_register_bar(&qxl->pci, QXL_IO_RANGE_INDEX,
+                     PCI_BASE_ADDRESS_SPACE_IO, &qxl->io_bar);
 
-    pci_register_bar_region(&qxl->pci, QXL_ROM_RANGE_INDEX,
-                            PCI_BASE_ADDRESS_SPACE_MEMORY, &qxl->rom_bar);
+    pci_register_bar(&qxl->pci, QXL_ROM_RANGE_INDEX,
+                     PCI_BASE_ADDRESS_SPACE_MEMORY, &qxl->rom_bar);
 
-    pci_register_bar_region(&qxl->pci, QXL_RAM_RANGE_INDEX,
-                            PCI_BASE_ADDRESS_SPACE_MEMORY, &qxl->vga.vram);
+    pci_register_bar(&qxl->pci, QXL_RAM_RANGE_INDEX,
+                     PCI_BASE_ADDRESS_SPACE_MEMORY, &qxl->vga.vram);
 
-    pci_register_bar_region(&qxl->pci, QXL_VRAM_RANGE_INDEX,
-                            PCI_BASE_ADDRESS_SPACE_MEMORY, &qxl->vram_bar);
+    pci_register_bar(&qxl->pci, QXL_VRAM_RANGE_INDEX,
+                     PCI_BASE_ADDRESS_SPACE_MEMORY, &qxl->vram_bar);
 
     qxl->ssd.qxl.base.sif = &qxl_interface.base;
     qxl->ssd.qxl.id = qxl->id;
diff --git a/hw/rtl8139.c b/hw/rtl8139.c
index f07af354fbca0c24475b176c52a833f755d2e577..c6cafc251316d83656860bcff89f5416f2a1942a 100644
--- a/hw/rtl8139.c
+++ b/hw/rtl8139.c
@@ -3471,10 +3471,8 @@ static int pci_rtl8139_init(PCIDevice *dev)
 
     memory_region_init_io(&s->bar_io, &rtl8139_io_ops, s, "rtl8139", 0x100);
     memory_region_init_io(&s->bar_mem, &rtl8139_mmio_ops, s, "rtl8139", 0x100);
-    pci_register_bar_region(&s->dev, 0, PCI_BASE_ADDRESS_SPACE_IO,
-                            &s->bar_io);
-    pci_register_bar_region(&s->dev, 1, PCI_BASE_ADDRESS_SPACE_MEMORY,
-                            &s->bar_mem);
+    pci_register_bar(&s->dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &s->bar_io);
+    pci_register_bar(&s->dev, 1, PCI_BASE_ADDRESS_SPACE_MEMORY, &s->bar_mem);
 
     qemu_macaddr_default_if_unset(&s->conf.macaddr);
 
diff --git a/hw/sun4u.c b/hw/sun4u.c
index cb76031223635b7e7c6dea3ae501cafcf167935a..7b2d0b17e4933dafa5d1fc4922f63effc1c44651 100644
--- a/hw/sun4u.c
+++ b/hw/sun4u.c
@@ -554,11 +554,9 @@ pci_ebus_init1(PCIDevice *pci_dev)
     pci_dev->config[0x0D] = 0x0a; // latency_timer
 
     isa_mmio_setup(&s->bar0, 0x1000000);
-    pci_register_bar_region(pci_dev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY,
-                            &s->bar0);
+    pci_register_bar(pci_dev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY, &s->bar0);
     isa_mmio_setup(&s->bar1, 0x800000);
-    pci_register_bar_region(pci_dev, 1, PCI_BASE_ADDRESS_SPACE_MEMORY,
-                            &s->bar1);
+    pci_register_bar(pci_dev, 1, PCI_BASE_ADDRESS_SPACE_MEMORY, &s->bar1);
     return 0;
 }
 
diff --git a/hw/usb-ehci.c b/hw/usb-ehci.c
index 6ef77988b72d36e1e486a060ecd80d3c48a9aa43..c9d0a692ed96d382947f1e9fbdc7e4b38bbc5bb7 100644
--- a/hw/usb-ehci.c
+++ b/hw/usb-ehci.c
@@ -2302,7 +2302,7 @@ static int usb_ehci_initfn(PCIDevice *dev)
     qemu_register_reset(ehci_reset, s);
 
     memory_region_init_io(&s->mem, &ehci_mem_ops, s, "ehci", MMIO_SIZE);
-    pci_register_bar_region(&s->dev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY, &s->mem);
+    pci_register_bar(&s->dev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY, &s->mem);
 
     fprintf(stderr, "*** EHCI support is under development ***\n");
 
diff --git a/hw/usb-ohci.c b/hw/usb-ohci.c
index d39bcb0c0d475847384987b6172c883743e909e5..d30db3f92f069f47ce68cb5888fe6fe7c0dd90af 100644
--- a/hw/usb-ohci.c
+++ b/hw/usb-ohci.c
@@ -1790,7 +1790,7 @@ static int usb_ohci_initfn_pci(struct PCIDevice *dev)
     ohci->state.irq = ohci->pci_dev.irq[0];
 
     /* TODO: avoid cast below by using dev */
-    pci_register_bar_region(&ohci->pci_dev, 0, 0, &ohci->state.mem);
+    pci_register_bar(&ohci->pci_dev, 0, 0, &ohci->state.mem);
     return 0;
 }
 
diff --git a/hw/usb-uhci.c b/hw/usb-uhci.c
index ea381698760531d01329ed0249ff06380c13dd07..16088d7dcaaf46df1273482b3a9ea3416b4e1685 100644
--- a/hw/usb-uhci.c
+++ b/hw/usb-uhci.c
@@ -1159,8 +1159,7 @@ static int usb_uhci_common_initfn(PCIDevice *dev)
     memory_region_init_io(&s->io_bar, &uhci_ioport_ops, s, "uhci", 0x20);
     /* Use region 4 for consistency with real hardware.  BSD guests seem
        to rely on this.  */
-    pci_register_bar_region(&s->dev, 4,
-                            PCI_BASE_ADDRESS_SPACE_IO, &s->io_bar);
+    pci_register_bar(&s->dev, 4, PCI_BASE_ADDRESS_SPACE_IO, &s->io_bar);
 
     return 0;
 }
diff --git a/hw/vga-pci.c b/hw/vga-pci.c
index 7062c4d5f5a727245ef1c6fe38dd3eb404096641..c67be0abebfef491db99726477c1289686ce187e 100644
--- a/hw/vga-pci.c
+++ b/hw/vga-pci.c
@@ -60,8 +60,7 @@ static int pci_vga_initfn(PCIDevice *dev)
                                   s->screen_dump, s->text_update, s);
 
      /* XXX: VGA_RAM_SIZE must be a power of two */
-     pci_register_bar_region(&d->dev, 0, PCI_BASE_ADDRESS_MEM_PREFETCH,
-                             &s->vram);
+     pci_register_bar(&d->dev, 0, PCI_BASE_ADDRESS_MEM_PREFETCH, &s->vram);
 
      if (!dev->rom_bar) {
          /* compatibility with pc-0.13 and older */
diff --git a/hw/virtio-pci.c b/hw/virtio-pci.c
index 95203c8dcafa1c1f1f03ae40bd46041fc0c070d5..df27c198b0938475a7c4e030bae79d40c0624975 100644
--- a/hw/virtio-pci.c
+++ b/hw/virtio-pci.c
@@ -644,9 +644,8 @@ void virtio_init_pci(VirtIOPCIProxy *proxy, VirtIODevice *vdev)
     memory_region_init(&proxy->msix_bar, "virtio-msix", 4096);
     if (vdev->nvectors && !msix_init(&proxy->pci_dev, vdev->nvectors,
                                      &proxy->msix_bar, 1, 0)) {
-        pci_register_bar_region(&proxy->pci_dev, 1,
-                                PCI_BASE_ADDRESS_SPACE_MEMORY,
-                                &proxy->msix_bar);
+        pci_register_bar(&proxy->pci_dev, 1, PCI_BASE_ADDRESS_SPACE_MEMORY,
+                         &proxy->msix_bar);
     } else
         vdev->nvectors = 0;
 
@@ -658,8 +657,8 @@ void virtio_init_pci(VirtIOPCIProxy *proxy, VirtIODevice *vdev)
 
     memory_region_init_io(&proxy->bar, &virtio_pci_config_ops, proxy,
                           "virtio-pci", size);
-    pci_register_bar_region(&proxy->pci_dev, 0, PCI_BASE_ADDRESS_SPACE_IO,
-                            &proxy->bar);
+    pci_register_bar(&proxy->pci_dev, 0, PCI_BASE_ADDRESS_SPACE_IO,
+                     &proxy->bar);
 
     if (!kvm_has_many_ioeventfds()) {
         proxy->flags &= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD;
diff --git a/hw/vmware_vga.c b/hw/vmware_vga.c
index 02b747806f4c5f9b4481897661965dd8fcd9a124..d5cfa70cba4d637ac03f22820fb6cc008f74740a 100644
--- a/hw/vmware_vga.c
+++ b/hw/vmware_vga.c
@@ -1291,13 +1291,13 @@ static int pci_vmsvga_initfn(PCIDevice *dev)
 
     memory_region_init_io(&s->io_bar, &vmsvga_io_ops, &s->chip,
                           "vmsvga-io", 0x10);
-    pci_register_bar_region(&s->card, 0, PCI_BASE_ADDRESS_SPACE_IO, &s->io_bar);
+    pci_register_bar(&s->card, 0, PCI_BASE_ADDRESS_SPACE_IO, &s->io_bar);
 
     vmsvga_init(&s->chip, VGA_RAM_SIZE);
 
-    pci_register_bar_region(&s->card, 1, PCI_BASE_ADDRESS_MEM_PREFETCH, iomem);
-    pci_register_bar_region(&s->card, 2, PCI_BASE_ADDRESS_MEM_PREFETCH,
-                            &s->chip.fifo_ram);
+    pci_register_bar(&s->card, 1, PCI_BASE_ADDRESS_MEM_PREFETCH, iomem);
+    pci_register_bar(&s->card, 2, PCI_BASE_ADDRESS_MEM_PREFETCH,
+                     &s->chip.fifo_ram);
 
     if (!dev->rom_bar) {
         /* compatibility with pc-0.13 and older */
diff --git a/hw/wdt_i6300esb.c b/hw/wdt_i6300esb.c
index abc2e177bb369e8a2454478aaa30cdb15e30886c..20d86731865b20d9c663a5b8c0b95b041848eb7d 100644
--- a/hw/wdt_i6300esb.c
+++ b/hw/wdt_i6300esb.c
@@ -405,7 +405,7 @@ static int i6300esb_init(PCIDevice *dev)
     d->previous_reboot_flag = 0;
 
     memory_region_init_io(&d->io_mem, &i6300esb_ops, d, "i6300esb", 0x10);
-    pci_register_bar_region(&d->dev, 0, 0, &d->io_mem);
+    pci_register_bar(&d->dev, 0, 0, &d->io_mem);
     /* qemu_register_coalesced_mmio (addr, 0x10); ? */
 
     return 0;
diff --git a/hw/xen_platform.c b/hw/xen_platform.c
index 0b8907511aba0330fd35fe14a1df4b95dfbacc5a..6e3ba8b5076606d054bb1da7dd0659bbde9fd3c9 100644
--- a/hw/xen_platform.c
+++ b/hw/xen_platform.c
@@ -353,13 +353,12 @@ static int xen_platform_initfn(PCIDevice *dev)
     pci_conf[PCI_INTERRUPT_PIN] = 1;
 
     platform_ioport_bar_setup(d);
-    pci_register_bar_region(&d->pci_dev, 0,
-                            PCI_BASE_ADDRESS_SPACE_IO, &d->bar);
+    pci_register_bar(&d->pci_dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &d->bar);
 
     /* reserve 16MB mmio address for share memory*/
     platform_mmio_setup(d);
-    pci_register_bar_region(&d->pci_dev, 1,
-                            PCI_BASE_ADDRESS_MEM_PREFETCH, &d->mmio_bar);
+    pci_register_bar(&d->pci_dev, 1, PCI_BASE_ADDRESS_MEM_PREFETCH,
+                     &d->mmio_bar);
 
     platform_fixed_ioport_init(d);