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descriptionRandom patches
last changeFri, 6 Jan 2017 15:18:09 +0000 (6 15:18 +0000)
content tags
         QEMU README

QEMU is a generic and open source machine & userspace emulator and

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).

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.

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.

QEMU as a whole is released under the GNU General Public License,
version 2. For full licensing details, consult the LICENSE file.


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:

  mkdir build
  cd build

Additional information can also be found online via the QEMU website:

Submitting patches

The QEMU source code is maintained under the GIT version control system.

   git clone git://

When submitting patches, the preferred approach is to use 'git
format-patch' and/or 'git send-email' to format & send the mail to the mailing list. All patches submitted must contain
a 'Signed-off-by' line from the author. Patches should follow the
guidelines set out in the HACKING and CODING_STYLE files.

Additional information on submitting patches can be found online via
the QEMU website

Bug reporting

The QEMU project uses Launchpad as its primary upstream bug tracker. Bugs
found when running code built from QEMU git or upstream released sources
should be reported via:

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 launchpad.

For additional information on bug reporting consult:


The QEMU community can be contacted in a number of ways, with the two
main methods being email and IRC

 - #qemu on

Information on additional methods of contacting the community can be
found online via the QEMU website:

-- End
2017-01-06 Peter MaydellMerge remote-tracking branch 'remotes/gonglei/tags... master
2017-01-06 Peter MaydellMerge remote-tracking branch 'remotes/jasowang/tags...
2017-01-06 Andrey Smirnovfsl_etsec: Fix Tx BD ring wrapping handling
2017-01-06 Hervé Poussineaurtl8139: correctly handle PHY reset
2017-01-06 Pavel Dovgalyukrecord/replay: add network support
2017-01-05 Peter MaydellMerge remote-tracking branch 'remotes/stefanha/tags...
2017-01-05 Peter MaydellMerge remote-tracking branch 'remotes/gkurz/tags/for...
2017-01-05 Peter MaydellMerge remote-tracking branch 'remotes/kraxel/tags/pull...
2017-01-03 Stefan Hajnocziiothread: add poll-grow and poll-shrink parameters
2017-01-03 Stefan Hajnocziaio: self-tune polling time
2017-01-03 Stefan Hajnoczivirtio: disable virtqueue notifications during polling
2017-01-03 Stefan Hajnocziaio: add .io_poll_begin/end() callbacks
2017-01-03 Stefan Hajnoczivirtio: turn vq->notification into a nested counter
2017-01-03 Stefan Hajnoczivirtio-scsi: suppress virtqueue kick during processing
2017-01-03 Stefan Hajnoczivirtio-blk: suppress virtqueue kick during processing
2017-01-03 Stefan Hajnocziiothread: add polling parameters
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