I am very new to Virtualization and of late I have been trying to familiarize myself with the way VMMs operate and how hypercalls are made.
Talking about which I plan to implement a new hypercall in KVM which is installed on my Ubuntu desktop, and in turn can be callable from the guest environment.With this hypercall I plan to just return a string saying "Hello World". At this point,I am clueless about how to make it happen.It would be really helpful if you could please guide me as to how do I go about implementing such a hypercall.Thank you!