Linux cache coloring.

I am working on improving a patch to Linux mm that allows h/w partitioning of last level cache. (This is useful for some real time scenarios, making process "warm-up" latency more predictable). Patch to mm looks not very good for general case, from both source "cleanliness" and performance points.
Now I wonder if moving this feature to KVM would make sense. It would be more "cleaner", but real time users hardly use KVM.