[bonzini]

There are many patents around microarchitectural optimizations and also features like performance monitoring, virtualization, etc.

It happened a few times to me to see a new, still undocumented, feature mentioned in Intel slides, and consult the patent to learn more about it.

[monocasa]

It's not like AMD and Intel agree on how to do performance monitoring and virtualization. What's a third implementations in the grand scheme of things?