Hi The -pcidevice host=bus:dev.func option of qemu defines the pcidevice we want the guest to use . It turns out that if a host device has a twin pci devices (e.g 2 NICs) then only the first of them can be passed to the qemu and be used by the guest . The second can be passed of course but is not used effectively . e.g : 0b:00.0 /0b:00.1 . The mirror device at the guest always shows up as 00:05.0 and can effectively map only 0b:0.0 Any idea where this limitation comes from ? thanks Zvi Dubitzky Virtualization and System Architecture Email:dubi@xxxxxxxxxx IBM Haifa Research Laboratory Phone: +972-4-8296182 Haifa, 31905, ISRAEL -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html