QEMU main repository: Please see https://www.qemu.org/docs/master/devel/submitting-a-patch.html for how to submit changes to QEMU. Pull Requests are ignored. Please only use release tarballs from the QEMU website. http://www.qemu.org
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Stefan Hajnoczi aec6836c73 vfio queue:
* Added several small fixes and cleanups
 * Added support for vfio-user client device
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Merge tag 'pull-vfio-20250626' of https://github.com/legoater/qemu into staging

vfio queue:

* Added several small fixes and cleanups
* Added support for vfio-user client device

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# gpg: Signature made Thu 26 Jun 2025 03:44:44 EDT
# gpg:                using RSA key A0F66548F04895EBFE6B0B6051A343C7CFFBECA1
# gpg: Good signature from "Cédric Le Goater <clg@redhat.com>" [full]
# gpg:                 aka "Cédric Le Goater <clg@kaod.org>" [full]
# Primary key fingerprint: A0F6 6548 F048 95EB FE6B  0B60 51A3 43C7 CFFB ECA1

* tag 'pull-vfio-20250626' of https://github.com/legoater/qemu: (25 commits)
  vfio-user: introduce vfio-user protocol specification
  docs: add vfio-user documentation
  vfio-user: add coalesced posted writes
  vfio-user: support posted writes
  vfio-user: add 'x-msg-timeout' option
  vfio-user: implement VFIO_USER_DMA_READ/WRITE
  vfio-user: implement VFIO_USER_DMA_MAP/UNMAP
  vfio-user: implement VFIO_USER_DEVICE_RESET
  vfio-user: set up container access to the proxy
  vfio-user: forward MSI-X PBA BAR accesses to server
  vfio-user: implement VFIO_USER_DEVICE_GET/SET_IRQ*
  vfio-user: set up PCI in vfio_user_pci_realize()
  vfio-user: implement VFIO_USER_REGION_READ/WRITE
  vfio-user: implement VFIO_USER_DEVICE_GET_REGION_INFO
  vfio-user: implement VFIO_USER_DEVICE_GET_INFO
  vfio-user: implement message send infrastructure
  vfio-user: implement message receive infrastructure
  vfio-user: connect vfio proxy to remote server
  vfio-user: add vfio-user class and container
  vfio/container: fails mdev hotplug if add migration blocker failed
  ...

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2 days ago
.github/workflows github: fix config mistake preventing repo lockdown commenting 3 years ago
.gitlab/issue_templates .gitlab/issue_templates: Move suggestions into comments 3 years ago
.gitlab-ci.d gitlab: disable debug info on CI builds 3 weeks ago
accel physmem: Support coordinated discarding of RAM with guest_memfd 5 days ago
audio audio: Reset rate control when adding bytes 1 month ago
authz qom: Make InterfaceInfo[] uses const 2 months ago
backends backends/tpm: Avoid using g_alloca() 3 weeks ago
block block: skip automatic zero-init of large array in ioq_submit 2 weeks ago
bsd-user bsd-user: add option to enable plugins 2 months ago
chardev chardev/char-socket: skip automatic zero-init of large array 2 weeks ago
common-user common-user/host/riscv: use tail pseudoinstruction for calling tail 1 month ago
configs * target/i386/kvm: Intel TDX support 4 weeks ago
contrib contrib: replace FSF postal address with licenses URL 2 days ago
crypto crypto: fully drop built-in cipher provider 1 month ago
disas include/system: Move exec/memory.h to system/memory.h 2 months ago
docs vfio-user: introduce vfio-user protocol specification 2 days ago
dump cleanup: Drop pointless return at end of function 2 months ago
ebpf ebpf: improve trace event coverage to all key operations 8 months ago
fpu fpu: Build only once 4 months ago
fsdev 9pfs: Introduce futimens file op 2 months ago
gdb-xml gdbstub: update aarch64-core.xml 3 weeks ago
gdbstub gdbstub: Implement qGDBServerVersion packet 3 weeks ago
host/include host/include/loongarch64: Fix inline assembly compatibility with Clang 3 months ago
hw vfio queue: 2 days ago
include vfio queue: 2 days ago
io io: Add helper for setting socket send buffer size 4 weeks ago
libdecnumber libdecnumber: replace FSF postal address with licenses URL 2 days ago
linux-headers update Linux headers to v6.16-rc3 1 week ago
linux-user linux-user: fix resource leaks in gen-vdso 5 days ago
migration memory: Unify the definiton of ReplayRamPopulate() and ReplayRamDiscard() 5 days ago
monitor monitor: don't wake up qmp_dispatcher_co coroutine upon cleanup 2 months ago
nbd nbd: Set unix socket send buffer on Linux 4 weeks ago
net net/stream: skip automatic zero-init of large array 2 weeks ago
pc-bios pc-bios/dtb/meson: Prefer target name to be outfile, not infile 2 weeks ago
plugins meson: fix Windows build 2 weeks ago
po po: update Italian translation 11 months ago
python python: Drop redundant warn_unused_configs = True 3 weeks ago
qapi i386/tdx: handle TDG.VP.VMCALL<GetQuote> 1 week ago
qga qga-win: implement a 'guest-get-load' command 2 weeks ago
qobject qapi: Move include/qapi/qmp/ to include/qobject/ 5 months ago
qom qom: reverse order of instance_post_init calls 1 month ago
replay include/exec: Split out icount.h 2 months ago
roms seabios: update submodule to 1.17.0 2 weeks ago
rust rust: hpet: fix new warning 1 week ago
scripts scripts: replace FSF postal address with licenses URL 2 days ago
scsi qom: Make InterfaceInfo[] uses const 2 months ago
semihosting include: Remove 'exec/exec-all.h' 2 months ago
stats qapi: Move include/qapi/qmp/ to include/qobject/ 5 months ago
storage-daemon storage-daemon/qapi/qapi-schema: Add a proper introduction 3 months ago
stubs qapi: make s390x specific CPU commands unconditionally available 1 month ago
subprojects subprojects: add the foreign crate 3 weeks ago
system physmem: Support coordinated discarding of RAM with guest_memfd 5 days ago
target target/i386/emulate: replace FSF postal address with licenses URL 2 days ago
tcg tcg: Split out tcg_gen_gvec_dup_imm_var 5 days ago
tests tests/vm: update openbsd image to 7.7 2 days ago
tools cleanup: Re-run return_directly.cocci 2 months ago
trace meson: fix Windows build 2 weeks ago
ui ui/vnc: Update display update interval when VM state changes to RUNNING 5 days ago
util util/rcu.c: replace FSF postal address with licenses URL 2 days ago
.b4-config Add a b4 configuration file 6 months ago
.dir-locals.el Add .dir-locals.el file to configure emacs coding style 10 years ago
.editorconfig editorconfig: update for perl scripts 5 months ago
.exrc qemu: add .exrc 13 years ago
.gdbinit .gdbinit: load QEMU sub-commands when gdb starts 8 years ago
.git-blame-ignore-revs metadata: add .git-blame-ignore-revs 2 years ago
.gitattributes rust: patch bilge-impl to allow compilation with 1.63.0 8 months ago
.gitignore configure: rename --enable-pypi to --enable-download, control subprojects too 2 years ago
.gitlab-ci.yml docs: Document GitLab custom CI/CD variables 4 years ago
.gitmodules meson: subprojects: replace berkeley-{soft,test}float-3 with wraps 2 years ago
.gitpublish Add a git-publish configuration file 7 years ago
.mailmap MAINTAINERS: Update Akihiko Odaki's affiliation 2 weeks ago
.patchew.yml scripts/checkpatch: roll diff tweaking into checkpatch itself 4 years ago
.readthedocs.yml readthodocs: fully specify a build environment 1 year ago
.travis.yml travis.yml: Remove the aarch64 job 2 weeks ago
COPYING COPYING: replace FSF postal address with licenses URL 2 days ago
COPYING.LIB COPYING: replace FSF postal address with licenses URL 2 days ago
Kconfig build-sys: Add rust feature option 9 months ago
Kconfig.host pvg: do not enable it on cross-architecture targets 4 months ago
LICENSE tcg/LICENSE: Remove out of date claim about TCG subdirectory licensing 6 years ago
MAINTAINERS vfio queue: 2 days ago
Makefile Makefile: "make dist" generates a .xz, not .bz2 3 months ago
README.rst README.rst: add the missing punctuations 12 months ago
VERSION Open 10.1 development tree 2 months ago
block.c block: move drain outside of quorum_del_child() 3 weeks ago
blockdev-nbd.c qapi: merge common parts of NbdServerOptions and nbd-server-start data 4 months ago
blockdev.c blockdev: drain while unlocked in external_snapshot_action() 3 weeks ago
blockjob.c block: move drain outside of bdrv_root_unref_child() 3 weeks ago
clippy.toml rust: use native Meson support for clippy and rustdoc 4 weeks ago
configure build, dockerfiles: add support for detecting rustdoc 4 weeks ago
cpu-common.c cpus: Prefer cached CpuClass over CPU_GET_CLASS() macro 4 months ago
cpu-target.c qemu: Convert target_name() to TargetInfo API 2 months ago
event-loop-base.c qom: Make InterfaceInfo[] uses const 2 months ago
gitdm.config contrib/gitdm: add group map for AMD 2 years ago
hmp-commands-info.hx migration/hmp: Add "info migrate -a", reorg the dump 1 month ago
hmp-commands.hx hmp/migration: Fix "migrate" command's documentation 1 year ago
iothread.c qom: Have class_init() take a const data argument 2 months ago
job-qmp.c qapi job: Elide redundant has_FOO in generated C 3 years ago
job.c test-bdrv-drain: Fix data races 3 months ago
meson.build vfio-user: implement message receive infrastructure 2 days ago
meson_options.txt meson: drop --enable-avx* options 2 months ago
module-common.c all: Clean up includes 10 years ago
os-posix.c os: add an ability to lock memory on_fault 5 months ago
os-wasm.c include/qemu/osdep.h: Add Emscripten-specific OS dependencies 2 months ago
os-win32.c include: Rename sysemu/ -> system/ 6 months ago
page-target.c page-vary: Move and rename qemu_target_page_bits_min 2 months ago
page-vary-common.c Remove qemu-common.h include from most units 3 years ago
page-vary-target.c page-vary: Restrict scope of TARGET_PAGE_BITS_MIN 2 months ago
pythondeps.toml meson: update to version 1.8.1 4 weeks ago
qemu-bridge-helper.c qemu-bridge-helper: relocate path to default ACL 5 years ago
qemu-edid.c qemu-edid: Restrict input parameter -d to avoid division by zero 3 years ago
qemu-img-cmds.hx docs/devel/docs: Document .hx file syntax 1 year ago
qemu-img.c block/snapshot: move drain outside of read-locked bdrv_snapshot_delete() 3 weeks ago
qemu-io-cmds.c qapi: Move include/qapi/qmp/ to include/qobject/ 5 months ago
qemu-io.c qapi: Move include/qapi/qmp/ to include/qobject/ 5 months ago
qemu-keymap.c cleanup: Drop pointless return at end of function 2 months ago
qemu-nbd.c nbd: Defer trace init until after daemonization 4 months ago
qemu-options.hx qemu-options.hx: Fix reversed description of icount sleep behavior 2 weeks ago
qemu.nsi pc-bios: Move device tree files in their own subdir 2 months ago
qemu.sasl sasl: remove comment about obsolete kerberos versions 4 years ago
replication.c replication: move include out of root directory 4 years ago
target-info-stub.c qemu: Introduce target_long_bits() 2 months ago
target-info.c qemu: Introduce target_long_bits() 2 months ago
trace-events system/dma-helpers.c: Move trace events to system/trace-events 7 months ago
version.rc configure: remove CONFIG_FILEVERSION and CONFIG_PRODUCTVERSION 5 years ago

README.rst

===========
QEMU README
===========

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
=============

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/>`_.


Building
========

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:


.. code-block:: shell

  mkdir build
  cd build
  ../configure
  make

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

* `<https://wiki.qemu.org/Hosts/Linux>`_
* `<https://wiki.qemu.org/Hosts/Mac>`_
* `<https://wiki.qemu.org/Hosts/W32>`_


Submitting patches
==================

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

.. 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
qemu-devel@nongnu.org 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.

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

* `<https://wiki.qemu.org/Contribute/SubmitAPatch>`_
* `<https://wiki.qemu.org/Contribute/TrivialPatches>`_

The QEMU website is also maintained under source control.

.. 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/>`_

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:

*  `<https://github.com/stefanha/git-publish>`_

The workflow with 'git-publish' is:

.. 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.

Sending v2:

.. 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.

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:

* `<https://gitlab.com/qemu-project/qemu/-/issues>`_

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:

* `<https://wiki.qemu.org/Contribute/ReportABug>`_


ChangeLog
=========

For version history and release notes, please visit
`<https://wiki.qemu.org/ChangeLog/>`_ or look at the git history for
more detailed information.


Contact
=======

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

* `<mailto:qemu-devel@nongnu.org>`_
* `<https://lists.nongnu.org/mailman/listinfo/qemu-devel>`_
* #qemu on irc.oftc.net

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

* `<https://wiki.qemu.org/Contribute/StartHere>`_