@MJGZ51 Hi! Since 8.3 PCI passthrough is part of the XAPI and come with dedicated xe commands: xe pci-list to have the list of PCI devices and then: xe pci-disable-dom0-access uuid=<pci uuid> to hide th device from dom0 xe pci-enable-dom0-access uuid=<pci uuid> to unhide the from dom0 These are the same API calls made by XO or any XAPI clients No need to edit manually the cmdline anymore! Regards