Good catch - be aware that for hypervisors (VMWare, KVM, ZEN, etc.) for supporting SRI-OV you actually need a certain HW - newer servers would usually have the ASIC on-board to support SRI-OV. i am guessing that a certain BIOS goes along with it...
if your server doesn't support SRI-OV in HW, PV (para Visualization) would work just fine.