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docs: Add some actual About text to about/index.rst

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Add some text to About to act as a brief introduction to the QEMU
manual and to make the about page a bit less of an abrupt start to
it.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Acked-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-id: 20210705095547.15790-6-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2021-07-05 10:55:45 +01:00
parent f347839258
commit 4a43fa3af9
1 changed files with 17 additions and 0 deletions
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docs/about/index.rst
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@ -1,6 +1,23 @@
About QEMU
==========
QEMU is a generic and open source machine emulator and virtualizer.
QEMU can be used in several different ways. The most common is for
"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 "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 commandline utilities,
such as the `qemu-img` disk image utility that allows you to create,
convert and modify disk images.
.. toctree::
:maxdepth: 2