I'm needing to use XEN for a project that contains multiple GPU cards with PCI passthrough.
However, I'm not really sure which version of XEN I should be using. In all likelyhood I may need to tweak the source code to get the GPU's to work properly.
Initially I installed Ubuntu server and started following this link: https://help.ubuntu.com/community/Xen
But then I realised that there are also bare metal installations of zen and a cloud version.
There are versions available on the citrix site as well as xen.org. I'm wanting to use the free open source version. What are the differences between them all and which should I be using?