Hello! > Is there a way how we could detect this according to the actual presence > of the PCI bus for the ARM machine? A certain device type that can be > queried rather than relying on a version check. I looked at the code you suggested. As far as i could understand, it actually parses an output of "qemu-system-blah -device ?" plus some extras. And this command lists all devices that this qemu version knows, and not only what can be attached to a particular machine. I browsed through the history of qemu patches. Actually, "gpex-pcihost" device was implemented together with adding it to 'virt' machine. So, i could query for this flag and count it as capability. But - it only says that qemu knows this device in principle. It does not say that this device is really a part of virt machine. Will it be acceptable ? Kind regards, Pavel Fedin Expert Engineer Samsung Electronics Research center Russia -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list