I am new to using Harvester. I understand that things like passthrough are possible with Kubevirt, but not exactly front and center in the UI. I think i know how to get it working. To get started, I see where I can add modules to a harvester install in =harvester.config=. Is there a place where I can add kernel parameters for grub in this yaml file? If not, how do i configure this on my system without having the kernel paramters scrubbed by Harvester updates?

yes, you can add parameters by this way. FIY, the feature is on our roadmap: https://github.com/harvester/harvester/issues/992

awesome, thanks!