# kvm --help
QEMU PC emulator version 0.10.50 (qemu-kvm-devel-88), Copyright (c) 2003-2008 Fabrice Bellard
usage: qemu [options] [disk_image]
[...]
-pcidevice host=bus:dev.func[,dma=none][,name=string] expose a PCI device to the guest OS.
           dma=none: don't perform any dma translations (default is to use an iommu) 'string' is used in log output.