Tag: xen

Xen /ˈzɛn/ is a Hypervisor providing services that allow multiple computer operating systems to execute on the same computer hardware concurrently.
The University of Cambridge Computer Laboratory developed the first versions of Xen. The Xen community develops and maintains Xen as free software, licensed under the GNU General Public License (GPLv2). Xen is currently available for the IA-32, x86-64 and ARM computer architectures.
Xen is a native, or bare-metal hypervisor. It runs in a more privileged CPU state than any other software on the machine.
Responsibilities of the hypervisor include memory management and CPU scheduling of all virtual machines (“domains”), and for launching the most privileged domain (“dom0”) – the only virtual machine which by default has direct access to hardware. From the dom0 the hypervisor can be managed and unprivileged domains (“domU”) can be launched.
The dom0 domain is typically a modified version of Linux, NetBSD or Solaris. User domains may either be…