vfio_pci_config_readw
return (vendor_id == vfio_pci_config_readw(device, PCI_VENDOR_ID)) &&
(device_id == vfio_pci_config_readw(device, PCI_DEVICE_ID));
command = vfio_pci_config_readw(self->device, PCI_COMMAND);
command = vfio_pci_config_readw(self->device, PCI_COMMAND);
command = vfio_pci_config_readw(self->device, PCI_COMMAND);