/* mmio bar for vga register access */
if (d->flags & (1 << PCI_VGA_FLAG_ENABLE_MMIO)) {
- memory_region_init(&d->mmio, "vga.mmio", 4096);
- memory_region_init_io(&d->ioport, &pci_vga_ioport_ops, d,
+ memory_region_init(&d->mmio, NULL, "vga.mmio", 4096);
+ memory_region_init_io(&d->ioport, NULL, &pci_vga_ioport_ops, d,
"vga ioports remapped", PCI_VGA_IOPORT_SIZE);
- memory_region_init_io(&d->bochs, &pci_vga_bochs_ops, d,
+ memory_region_init_io(&d->bochs, NULL, &pci_vga_bochs_ops, d,
"bochs dispi interface", PCI_VGA_BOCHS_SIZE);
memory_region_add_subregion(&d->mmio, PCI_VGA_IOPORT_OFFSET,