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Richard Henderson 180c2f24d5 -----BEGIN PGP SIGNATURE----- 1 day ago
.github/workflows github: fix config mistake preventing repo lockdown commenting 2 months ago
.gitlab/issue_templates GitLab: Add "Feature Request" issue template. 1 year ago
.gitlab-ci.d gitlab-ci: Extend timeout for ubuntu-20.04-s390x-all to 75m 2 days ago
accel accel/stubs: Add tcg stub for probe_access_flags 1 week ago
audio introduce -audio as a replacement for -soundhw 2 months ago
authz configure, meson: convert pam detection to meson 1 year ago
backends crypto: Introduce RSA algorithm 3 weeks ago
block block: use 'unsigned' for in_flight field on driver state 1 week ago
bsd-user bsd-user: Remove stray 'inline' from do_bsd_close 5 days ago
chardev QIOChannel: Add flags on io_writev and introduce io_flush callback 2 months ago
common-user common-user: Only compile the common user code if have_user is set 1 week ago
configs default-configs: Add loongarch linux-user support 3 days ago
contrib contrib/vhost-user-blk: fix 32 bit build and enable 1 week ago
crypto test/crypto: Add test suite for crypto akcipher 1 month ago
disas disas: Remove libvixl disassembler 2 days ago
docs docs/system/devices/usb/canokey: remove limitations on qemu-xhci 6 days ago
dtc@b6910bec11 dtc: Update to version 1.6.1 9 months ago
dump dump/win_dump: add 32-bit guest Windows support 3 months ago
ebpf ebpf: replace deprecated bpf_program__set_socket_filter 1 day ago
fpu softfloat: Use FloatRelation for fracN_cmp 2 months ago
fsdev Remove qemu-common.h include from most units 3 months ago
gdb-xml target/loongarch: Add gdb support. 1 month ago
hw e1000: set RX descriptor status in a separate operation 1 day ago
include * Fix memory leak in test-cutils 2 days ago
io io: add a QIOChannelNull equivalent to /dev/null 2 weeks ago
libdecnumber libdecnumber: Introduce decNumberIntegralToInt128 8 months ago
linux-headers linux-headers: Add vduse.h 2 weeks ago
linux-user linux-user: Add LoongArch cpu_loop support 3 days ago
meson@12f9f04ba0 meson: bump submodule to 0.59.3 8 months ago
migration migration: remove the QEMUFileOps abstraction 2 weeks ago
monitor migration: Change zero_copy_send from migration parameter to migration capability 2 weeks ago
nbd nbd: trace long NBD operations 1 week ago
net net/vmnet: implement bridged mode (vmnet-bridged) 2 months ago
pc-bios configure: enable cross compilation of vof 1 month ago
plugins Clean up header guards that don't match their file name 2 months ago
po po: add ukrainian translation 2 days ago
python Fix 'writeable' typos 4 weeks ago
qapi trivial patches pull request 20220629 1 week ago
qga meson: qga: do not use deprecated meson.build_root() 1 month ago
qobject include/qapi: add g_autoptr support for qobject types 3 months ago
qom include: add qemu/keyval.h 3 months ago
replay replay: simplify async event processing 1 month ago
roms New SeaBIOS-hppa version 6 1 month ago
scripts * Fix memory leak in test-cutils 2 days ago
scsi QIOChannel: Add flags on io_writev and introduce io_flush callback 2 months ago
semihosting semihosting: Create semihost_sys_poll_one 1 week ago
slirp@9d59bb775d slirp: bump submodule past 4.7 release 2 months ago
softmmu vga: avoid crash if no default vga card 1 week ago
storage-daemon vduse-blk: Add name option 2 weeks ago
stubs hw/i386/xen/xen-hvm: Inline xen_piix_pci_write_config_client() and remove it 1 week ago
subprojects libvhost-user: Fix VHOST_USER_ADD_MEM_REG reply 1 week ago
target * Fix memory leak in test-cutils 2 days ago
tcg tcg/tci: Remove CONFIG_DEBUG_TCG_INTERPRETER 2 days ago
tests tests: use consistent bandwidth/downtime limits in migration tests 2 days ago
tools Trivial: 3 char repeat typos 1 week ago
trace error: use GLib to remember the program name 4 months ago
ui ui/cocoa: Fix clipboard text release 6 days ago
util trivial patches pull request 20220629 1 week ago
.cirrus.yml cirrus/win32: upgrade mingw base packages 2 months ago
.dir-locals.el Add .dir-locals.el file to configure emacs coding style 7 years ago
.editorconfig .editorconfig: update the automatic mode setting for Emacs 1 year ago
.exrc qemu: add .exrc 10 years ago
.gdbinit .gdbinit: load QEMU sub-commands when gdb starts 5 years ago
.gitattributes gitattributes: Cover Objective-C source files 3 months ago
.gitignore .gitignore: add .gcov pattern 5 months ago
.gitlab-ci.yml docs: Document GitLab custom CI/CD variables 11 months ago
.gitmodules vfio-user: build library 3 weeks ago
.gitpublish Add a git-publish configuration file 4 years ago
.mailmap MAINTAINERS/.mailmap: update email for Leif Lindholm 2 months ago
.patchew.yml scripts/checkpatch: roll diff tweaking into checkpatch itself 1 year ago
.readthedocs.yml readthedocs: build with Python 3.6 2 years ago
.travis.yml gitlab: disable accelerated zlib for s390x 4 months ago
COPYING COPYING: update from FSF 14 years ago
COPYING.LIB COPYING.LIB: Synchronize the LGPL 2.1 with the version from 3 years ago
Kconfig meson: Introduce target-specific Kconfig 1 year ago vfio-user: build library 3 weeks ago
LICENSE tcg/LICENSE: Remove out of date claim about TCG subdirectory licensing 3 years ago
MAINTAINERS disas: Remove libvixl disassembler 2 days ago
Makefile build: include pc-bios/ part in the ROMS variable 3 weeks ago
README.rst README: Fix some documentation URLs 9 months ago
VERSION Open 7.1 development tree 3 months ago
block.c block: Classify bdrv_get_flags() as I/O function 2 months ago
blockdev-nbd.c nbd/server: Allow MULTI_CONN for shared writable exports 2 months ago
blockdev.c Replace qemu_gettimeofday() with g_get_real_time() 3 months ago
blockjob.c assertions for blockjob.h global state API 4 months ago
configure * statistics subsystem 3 weeks ago
cpu.c util/log: Remove qemu_log_close 3 months ago
cpus-common.c Use g_new() & friends where that makes obvious sense 4 months ago
disas.c disas: Remove libvixl disassembler 2 days ago
event-loop-base.c util/event-loop-base: Introduce options to set the thread pool size 2 months ago
gdbstub.c gdbstub: Adjust gdb_syscall_complete_cb declaration 1 week ago
gitdm.config contrib/gitdm: add a new interns group-map for GSoC/Outreachy work 12 months ago
hmp-commands-info.hx hmp: add filtering of statistics by name 3 weeks ago
hmp-commands.hx block: add more commands to preconfig mode 3 weeks ago
iothread.c util/event-loop-base: Introduce options to set the thread pool size 2 months ago
job-qmp.c progressmeter: protect with a mutex 1 year ago
job.c job.h: assertions in the callers of JobDriver function pointers 4 months ago exec/memory_ldst: Use correct type sizes 1 year ago Require a recent version of libpng 2 days ago
meson_options.txt vduse-blk: Implement vduse-blk export 2 weeks ago
module-common.c all: Clean up includes 7 years ago
os-posix.c os-posix: replace pipe()+cloexec with g_unix_open_pipe(CLOEXEC) 2 months ago
os-win32.c Remove qemu-common.h include from most units 3 months ago
page-vary-common.c Remove qemu-common.h include from most units 3 months ago
page-vary.c include: move target page bits declaration to page-vary.h 3 months ago
qemu-bridge-helper.c qemu-bridge-helper: relocate path to default ACL 2 years ago
qemu-edid.c edid: set default resolution to 1280x800 (WXGA) 6 months ago
qemu-img-cmds.hx qemu-img: Unify [-b [-F]] documentation 5 months ago
qemu-img.c qapi: rename BlockDirtyBitmapMergeSource to BlockDirtyBitmapOrStr 2 months ago
qemu-io-cmds.c nbd patches for 2022-03-07 4 months ago
qemu-io.c include: move qemu_*_exec_dir() to cutils 1 month ago
qemu-keymap.c qemu-keymap: Add license in generated files 7 months ago
qemu-nbd.c qemu-nbd: Pass max connections to blockdev layer 2 months ago
qemu-options.hx hw/cxl: Make the CXL fixed memory window setup a machine parameter. 4 weeks ago
qemu.nsi nsis installer: Fix mouse-over descriptions for emulators 4 months ago
qemu.sasl sasl: remove comment about obsolete kerberos versions 1 year ago
replication.c replication: move include out of root directory 1 year ago
trace-events tracing: remove TCG memory access tracing 5 months ago
version.rc configure: remove CONFIG_FILEVERSION and CONFIG_PRODUCTVERSION 2 years ago



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

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.


Documentation can be found hosted online at The documentation for the current development version that is available at is generated from the docs/ folder in the source tree, and is built by Sphinx <>_.


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

When submitting patches, one common 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 style section <> of the Developers Guide.

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

The QEMU website is also maintained under source control.

git clone

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.

For installation instructions, please go to

The workflow with 'git-publish' is:

$ 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.

Sending v2:

$ 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.

Bug reporting

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:

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.

For additional information on bug reporting consult:


For version history and release notes, please visit or look at the git history for more detailed information.


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

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