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About QEMU
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QEMU is a generic and open source machine emulator and virtualizer.
QEMU can be used in several different ways. The most common is for
:ref:`System Emulation`, where it provides a virtual model of an
entire machine (CPU, memory and emulated devices) to run a guest OS.
In this mode the CPU may be fully emulated, or it may work with a
hypervisor such as KVM, Xen, Hax or Hypervisor.Framework to allow the
guest to run directly on the host CPU.
The second supported way to use QEMU is :ref:`User Mode Emulation`,
where QEMU can launch processes compiled for one CPU on another CPU.
In this mode the CPU is always emulated.
QEMU also provides a number of standalone :ref:`command line
utilities<Tools>`, such as the ``qemu-img`` disk image utility that
allows you to create, convert and modify disk images.
.. toctree::
:maxdepth: 2
build-platforms
emulation
deprecated
removed-features
license