Limit all vritual machines IOPs

Hey guys,

Do you know of any way to limit all the virtual machines, or virtual machines by tag to a specified number of IOPs?

So far I was limiting vms by enabling Storage Control Policy and settings the Max IOPs in the resources tab for each disk.

This is far from being optimal, I thought about scripting this, but before I go there I must be sure there's no other, more elegant way.