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=========== | ||
QEMU README | ||
=========== | ||
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QEMU is a generic and open source machine & userspace emulator and | ||
virtualizer. | ||
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QEMU is capable of emulating a complete machine in software without any | ||
need for hardware virtualization support. By using dynamic translation, | ||
it achieves very good performance. QEMU can also integrate with the Xen | ||
and KVM hypervisors to provide emulated hardware while allowing the | ||
hypervisor to manage the CPU. With hypervisor support, QEMU can achieve | ||
near native performance for CPUs. When QEMU emulates CPUs directly it is | ||
capable of running operating systems made for one machine (e.g. an ARMv7 | ||
board) on a different machine (e.g. an x86_64 PC board). | ||
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QEMU is also capable of providing userspace API virtualization for Linux | ||
and BSD kernel interfaces. This allows binaries compiled against one | ||
architecture ABI (e.g. the Linux PPC64 ABI) to be run on a host using a | ||
different architecture ABI (e.g. the Linux x86_64 ABI). This does not | ||
involve any hardware emulation, simply CPU and syscall emulation. | ||
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QEMU aims to fit into a variety of use cases. It can be invoked directly | ||
by users wishing to have full control over its behaviour and settings. | ||
It also aims to facilitate integration into higher level management | ||
layers, by providing a stable command line interface and monitor API. | ||
It is commonly invoked indirectly via the libvirt library when using | ||
open source applications such as oVirt, OpenStack and virt-manager. | ||
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QEMU as a whole is released under the GNU General Public License, | ||
version 2. For full licensing details, consult the LICENSE file. | ||
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Documentation | ||
============= | ||
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Documentation can be found hosted online at | ||
`<https://www.qemu.org/documentation/>`_. The documentation for the | ||
current development version that is available at | ||
`<https://www.qemu.org/docs/master/>`_ is generated from the ``docs/`` | ||
folder in the source tree, and is built by `Sphinx | ||
<https://www.sphinx-doc.org/en/master/>`_. | ||
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Building | ||
======== | ||
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QEMU is multi-platform software intended to be buildable on all modern | ||
Linux platforms, OS-X, Win32 (via the Mingw64 toolchain) and a variety | ||
of other UNIX targets. The simple steps to build QEMU are: | ||
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.. code-block:: shell | ||
mkdir build | ||
cd build | ||
../configure | ||
make | ||
Additional information can also be found online via the QEMU website: | ||
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* `<https://wiki.qemu.org/Hosts/Linux>`_ | ||
* `<https://wiki.qemu.org/Hosts/Mac>`_ | ||
* `<https://wiki.qemu.org/Hosts/W32>`_ | ||
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Submitting patches | ||
================== | ||
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The QEMU source code is maintained under the GIT version control system. | ||
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.. code-block:: shell | ||
git clone https://gitlab.com/qemu-project/qemu.git | ||
When submitting patches, one common approach is to use 'git | ||
format-patch' and/or 'git send-email' to format & send the mail to the | ||
[email protected] mailing list. All patches submitted must contain | ||
a 'Signed-off-by' line from the author. Patches should follow the | ||
guidelines set out in the `style section | ||
<https://www.qemu.org/docs/master/devel/style.html>`_ of | ||
the Developers Guide. | ||
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Additional information on submitting patches can be found online via | ||
the QEMU website | ||
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* `<https://wiki.qemu.org/Contribute/SubmitAPatch>`_ | ||
* `<https://wiki.qemu.org/Contribute/TrivialPatches>`_ | ||
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The QEMU website is also maintained under source control. | ||
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.. code-block:: shell | ||
git clone https://gitlab.com/qemu-project/qemu-web.git | ||
* `<https://www.qemu.org/2017/02/04/the-new-qemu-website-is-up/>`_ | ||
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A 'git-publish' utility was created to make above process less | ||
cumbersome, and is highly recommended for making regular contributions, | ||
or even just for sending consecutive patch series revisions. It also | ||
requires a working 'git send-email' setup, and by default doesn't | ||
automate everything, so you may want to go through the above steps | ||
manually for once. | ||
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For installation instructions, please go to | ||
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* `<https://github.com/stefanha/git-publish>`_ | ||
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The workflow with 'git-publish' is: | ||
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.. code-block:: shell | ||
$ git checkout master -b my-feature | ||
$ # work on new commits, add your 'Signed-off-by' lines to each | ||
$ git publish | ||
Your patch series will be sent and tagged as my-feature-v1 if you need to refer | ||
back to it in the future. | ||
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Sending v2: | ||
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.. code-block:: shell | ||
$ git checkout my-feature # same topic branch | ||
$ # making changes to the commits (using 'git rebase', for example) | ||
$ git publish | ||
Your patch series will be sent with 'v2' tag in the subject and the git tip | ||
will be tagged as my-feature-v2. | ||
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Bug reporting | ||
============= | ||
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The QEMU project uses GitLab issues to track bugs. Bugs | ||
found when running code built from QEMU git or upstream released sources | ||
should be reported via: | ||
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* `<https://gitlab.com/qemu-project/qemu/-/issues>`_ | ||
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If using QEMU via an operating system vendor pre-built binary package, it | ||
is preferable to report bugs to the vendor's own bug tracker first. If | ||
the bug is also known to affect latest upstream code, it can also be | ||
reported via GitLab. | ||
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For additional information on bug reporting consult: | ||
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* `<https://wiki.qemu.org/Contribute/ReportABug>`_ | ||
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ChangeLog | ||
========= | ||
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For version history and release notes, please visit | ||
`<https://wiki.qemu.org/ChangeLog/>`_ or look at the git history for | ||
more detailed information. | ||
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Contact | ||
======= | ||
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The QEMU community can be contacted in a number of ways, with the two | ||
main methods being email and IRC | ||
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* `<mailto:[email protected]>`_ | ||
* `<https://lists.nongnu.org/mailman/listinfo/qemu-devel>`_ | ||
* #qemu on irc.oftc.net | ||
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Information on additional methods of contacting the community can be | ||
found online via the QEMU website: | ||
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* `<https://wiki.qemu.org/Contribute/StartHere>`_ |
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