Can't open PciIo protocol in both qemu (Nt32Pkg) and VirtualBox EFI

["Nikolay Bodunov" <for_internet_shops@mail.ru>]

Hello

I try to make work a code from "UEFI Driver Writer Guide", but always receive EFI_UNSUPPORTED status:

EFI_STATUS
EFIAPI
PciDriverOnlyDriverBindingSupported (
  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
  IN EFI_HANDLE                   ControllerHandle,
  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath OPTIONAL
  )
{
    EFI_STATUS                       Status;
    EFI_PCI_IO_PROTOCOL        *PciIo;
    Status = gBS->OpenProtocol (
        ControllerHandle,
        &gEfiPciIoProtocolGuid,
        (VOID **)&PciIo,
        This->DriverBindingHandle,
        ControllerHandle,
        EFI_OPEN_PROTOCOL_BY_DRIVER 
        );
    DEBUG((EFI_D_INFO, "Status is %r \r\n", Status));
    if (EFI_ERROR (Status)) {
        return Status;
    }
    return EFI_SUCCESS;
}

However, for example, with EFI_SIMPLE_FILE_SYSTEM_PROTOCOL instead of  EFI_PCI_IO_PROTOCOL  OpenProtocol() works fine and returns EFI_SUCCESS.

Driver project was created with UEFI Driver Wizard. Inf file contains gEfiPciIoProtocolGuid.
Where I could make a mistake?

WBR,
John