illumos-gateis currently limited to Intel CPUs with EPT extensions, although porting work is underway (as of March 2013) to add some AMD CPU support.
Hypervisor-based virtualization (not zones) allow to run different operating systems such as windows Windows and linuxLinux, in virtual machines hosted on an OpenIndiana machine. Note that you can only have one hypervisor engine accelerated by hardware (i.e. CPU extensions) active at any one time. Operating-system level virtualization (zones, containers) require the guest OSes operating environments to use the same kernel as the host, though possibly with a different set of user-space programs (especially in case of branded zones), and are often combined with hypervisor-managed VMs to fine-grain resource control or administrative access to the VMs or just to group them by project.
Some of the more generic available options will be covered in this chapter. Depending on your deployment goals and resources, and not in the least – on your networking topology, you may have a need for much more complicated setups than are explained here. Some such setups are detailed on other pages in this Wiki and the illumos Wiki, others can be found on blogs throughout the Internet.