[Xen-devel] Re: xen-unstable pci passthrough

[Christian Tramnitz <chris.ace@xxxxxxx>]

Han, Weidong wrote:
> Actually the 1:1 mapping patch is too tricky, we don't think it's suitable to 
> be in upstream. The better way is the gfx vendors to remove this trick (maybe 
> change their drivers) to make them virtualization friendly.
I don't think that this is very likely. The userbase is to small (right 
now), not to talk about existing bugs that affect a larger user group 
that won't be fixed.
Also Nvidia wants to see some extra $ for their premium products 
(capable of Multi OS), I don't think they will just change the drivers 
to make that feature available for every card.
If anyhow possible we should try to get that "intelligence" into 
Xen/xen-qemu and not rely on the vendors. If tricky/untested/unstable it 
should be marked as such and its usage made optional, but I see a lot of 
potential in that direction.
Best regards,
  Christian


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