I am trying to know how linux PCIE NIC SR-IOV work. I am using a Unbuntu with Intel 82599 NIC as a host. Under NIC driver directory(ixgbe) in linux Kernel, there is a file named "ixgbe_sriov.c". I know this file may drive to make some VFs which respectively show some PCIE devices to user. My questions is "if i install another ubuntu as a guest OS on my host,what kind of NIC driver does the guest OS use? Still the 82599 ixbge driver?“ Anybody know it?