[gentoo-user] How to use SR-IOV on a LSI RAID controller

I bought a LSI-9211-8i / SAS 2008 controller which reports support for 
SR-IOV in lspci and I am wondering how I can use it.

There is no info on the internet about this not even for their newer 
controllers where there is a lot of advertising about SR-IOV.

The idea is that you can assign a RAID array, individual hard drive, etc 
to a VF which is then assigned to a VM via IOMMU providing better almost 
native performance vs emulated disks.

Thanks!