QEMU With E2K User Support
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Thomas Huth d84568b773 tcg/optimize: Add fallthrough annotations
To be able to compile this file with -Werror=implicit-fallthrough,
we need to add some fallthrough annotations to the case statements
that might fall through. Unfortunately, the typical "/* fallthrough */"
comments do not work here as expected since some case labels are
wrapped in macros and the compiler fails to match the comments in
this case. But using __attribute__((fallthrough)) seems to work fine,
so let's use that instead (by introducing a new QEMU_FALLTHROUGH
macro in our compiler.h header file).

Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20201211152426.350966-11-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2020-12-18 09:14:23 +01:00
.github .github: Enable repo-lockdown bot to refuse GitHub pull requests 2020-04-07 16:19:18 +01:00
.gitlab-ci.d gitlab-ci: Add Xen cross-build jobs 2020-12-09 08:04:34 +01:00
accel accel/tcg/user-exec: silence the compiler warnings 2020-12-18 09:14:23 +01:00
audio audio: add sanity check 2020-12-15 09:28:52 +01:00
authz authz-simple: Check that 'identity' property is set 2020-11-18 10:51:35 +00:00
backends qdev: Make qdev_get_prop_ptr() get Object* arg 2020-12-15 10:02:07 -05:00
block block/file-posix: fix a possible undefined behavior 2020-12-13 23:56:16 +01:00
bsd-user trace: remove argument from trace_init_file 2020-11-11 13:08:09 +00:00
capstone@f8b1b83301 capstone: Update to upstream "next" branch 2020-10-03 04:23:14 -05:00
chardev chardev: do not use machine_init_done 2020-12-15 12:51:51 -05:00
contrib elf2dmp/pdb: Plug memleak in pdb_init_from_file 2020-12-13 23:56:16 +01:00
crypto crypto: Move the creation of the library to the main meson.build 2020-10-12 11:50:20 -04:00
default-configs hw/mips: Remove the 'r4k' machine 2020-11-03 16:51:13 +01:00
disas disas/libvixl: Fix fall-through annotation for GCC >= 7 2020-12-18 09:14:22 +01:00
docs docs: set CONFDIR when running sphinx 2020-12-15 12:52:06 -05:00
dtc@85e5d83984 Makefile: dtc: update, build the libfdt target 2020-06-16 14:49:05 +01:00
dump monitor: Use getter/setter functions for cur_mon 2020-10-09 07:08:19 +02:00
fpu softfloat: Define misc operations for bfloat16 2020-08-28 10:48:07 -07:00
fsdev fsdev: open brace '{' following struct go on the same line 2020-12-13 17:46:36 +01:00
gdb-xml target/avr: CPU class: Add GDB support 2020-07-10 17:58:32 +02:00
hw hw/intc/arm_gicv3_kvm: silence the compiler warnings 2020-12-18 09:14:23 +01:00
include tcg/optimize: Add fallthrough annotations 2020-12-18 09:14:23 +01:00
io io: Don't use '#' flag of printf format 2020-10-29 09:57:37 +00:00
libdecnumber qemu/: fix some comment spelling errors 2020-09-17 20:35:43 +02:00
linux-headers linux-headers: update against 5.10-rc1 2020-11-01 12:30:51 -07:00
linux-user linux-user: remove GNUC check 2020-12-15 12:53:14 -05:00
meson@776acd2a80 submodules: bump meson to 0.55.3 2020-10-17 10:45:42 -04:00
migration migration, vl: start migration via qmp_migrate_incoming 2020-12-10 12:15:14 -05:00
monitor qmp: generalize watchdog-set-action to -no-reboot/-no-shutdown 2020-12-15 12:51:57 -05:00
nbd * Fixes for compiling on Haiku, and add Haiku VM for compile-testing 2020-11-17 14:12:21 +00:00
net netfilter: Use class properties 2020-12-15 10:02:07 -05:00
pc-bios build: -no-pie is no functional linker flag 2020-12-15 12:53:16 -05:00
plugins plugin: propagate errors 2020-12-15 12:51:56 -05:00
po meson: convert po/ 2020-08-21 06:30:45 -04:00
python treewide: do not use short-form boolean options 2020-12-10 12:15:11 -05:00
qapi vl: Add option to avoid stopping VM upon guest panic 2020-12-15 12:51:58 -05:00
qga qga: Tweak a guest-shutdown error message 2020-12-10 17:16:44 +01:00
qobject json: Fix a memleak in parse_pair() 2020-11-17 15:39:53 +01:00
qom * Fix for NULL segments (Bin Meng) 2020-12-11 13:50:35 +00:00
replay replay: remove some dead code 2020-11-09 04:09:49 -05:00
roms qboot: update to latest upstream 2020-11-20 10:48:53 -05:00
scripts scripts/git.orderfile: Keep files with .inc extension sorted 2020-12-15 12:53:16 -05:00
scsi trace: remove argument from trace_init_file 2020-11-11 13:08:09 +00:00
slirp@8f43a99191 slirp: update to fix CVE-2020-29129 CVE-2020-29130 2020-11-27 20:57:11 +04:00
softmmu vl: rename local variable in configure_accelerators 2020-12-15 12:52:06 -05:00
storage-daemon storage-daemon: Call bdrv_close_all() on exit 2020-12-11 17:52:40 +01:00
stubs chardev: do not use machine_init_done 2020-12-15 12:51:51 -05:00
subprojects/libvhost-user libvhost-user: add a simple link test without glib 2020-12-09 13:04:17 -05:00
target target/sparc/win_helper: silence the compiler warnings 2020-12-18 09:14:23 +01:00
tcg tcg/optimize: Add fallthrough annotations 2020-12-18 09:14:23 +01:00
tests tests: remove GCC < 4 fallbacks 2020-12-15 12:52:10 -05:00
tools virtiofsd: replace _Static_assert with QEMU_BUILD_BUG_ON 2020-12-15 12:52:10 -05:00
trace trace: use STAP_SDT_V2 to work around symbol visibility 2020-11-19 16:41:09 +00:00
ui qmp: generalize watchdog-set-action to -no-reboot/-no-shutdown 2020-12-15 12:51:57 -05:00
util qemu-option: pass QemuOptsList to opts_accepts_any 2020-12-15 12:52:06 -05:00
.cirrus.yml Remove obsolete setuptools dependency and fix Stefan's 2020-11-26 14:25:47 +00:00
.dir-locals.el
.editorconfig meson: rename included C source files to .c.inc 2020-08-21 06:18:30 -04:00
.exrc
.gdbinit .gdbinit: load QEMU sub-commands when gdb starts 2017-06-07 14:38:45 +01:00
.gitattributes buildsys: Help git-diff adding .gitattributes config file 2020-11-18 09:33:16 +01:00
.gitignore Add *.pyc back to the .gitignore file 2020-09-23 19:09:56 +02:00
.gitlab-ci.yml pc,pci,virtio: fixes, cleanups 2020-12-09 20:08:54 +00:00
.gitmodules gitmodules: add qemu.org vbootrom submodule 2020-09-23 13:44:59 +01:00
.gitpublish Add a git-publish configuration file 2018-03-05 09:03:17 +00:00
.mailmap MAINTAINERS: chenhc@lemote.com -> chenhuacai@kernel.org 2020-12-13 16:00:58 +01:00
.patchew.yml ci: store Patchew configuration in the tree 2019-06-03 14:03:02 +02:00
.readthedocs.yml readthedocs: build with Python 3.6 2020-10-05 16:30:45 +01:00
.shippable.yml shippable.yml: Remove the Debian9-based MinGW cross-compiler tests 2020-10-02 12:29:11 +01:00
.travis.yml gitlab-ci: Move coroutine tests across to gitlab 2020-12-09 08:04:34 +01:00
CODING_STYLE.rst CODING_STYLE.rst: Be less strict about 80 character limit 2020-12-13 17:51:33 +01:00
COPYING
COPYING.LIB COPYING.LIB: Synchronize the LGPL 2.1 with the version from gnu.org 2019-01-30 11:01:22 +01:00
Kconfig Makefile: simplify MINIKCONF rules 2020-07-10 18:02:21 -04:00
Kconfig.host configure: Fix build dependencies with vhost-vdpa. 2020-09-29 02:15:24 -04:00
LICENSE tcg/LICENSE: Remove out of date claim about TCG subdirectory licensing 2019-11-11 15:11:21 +01:00
MAINTAINERS i386: hvf: remove stale MAINTAINERS entry for old hvf stubs 2020-12-16 14:06:53 -05:00
Makefile Makefile: No echoing for 'make help V=1' 2020-11-09 04:09:49 -05:00
README.rst CHANGELOG: remove disused file 2020-10-27 16:48:50 +01:00
VERSION Open 6.0 development tree 2020-12-08 21:04:57 +00:00
block.c block: introduce BDRV_MAX_LENGTH 2020-12-11 17:52:40 +01:00
blockdev-nbd.c nbd: Update qapi to support exporting multiple bitmaps 2020-10-30 15:10:15 -05:00
blockdev.c blockdev: Fix a memleak in drive_backup_prepare() 2020-12-13 23:56:16 +01:00
blockjob.c qemu/atomic.h: rename atomic_ to qatomic_ 2020-09-23 16:07:44 +01:00
configure build: -no-pie is no functional linker flag 2020-12-15 12:53:16 -05:00
cpu.c cpu: Move cpu_common_props to hw/core/cpu.c 2020-12-15 10:02:07 -05:00
cpus-common.c overall/alpha tcg cpus|hppa: Fix Lesser GPL version number 2020-11-15 16:43:54 +01:00
disas.c disas: Enable capstone disassembly for s390x 2020-10-03 04:25:14 -05:00
exec-vary.c nomaintainer: Fix Lesser GPL version number 2020-11-15 17:04:40 +01:00
gdbstub.c gdbstub: Correct misparsing of vCont C/S requests 2020-12-15 12:04:29 +00:00
gitdm.config contrib: gitdm: add a mapping for Janus Technologies 2019-03-12 19:31:29 +00:00
hmp-commands-info.hx replay: introduce info hmp/qmp command 2020-10-06 08:34:49 +02:00
hmp-commands.hx monitor: allow quitting while in preconfig state 2020-12-15 12:51:57 -05:00
iothread.c qemu/atomic.h: rename atomic_ to qatomic_ 2020-09-23 16:07:44 +01:00
job-qmp.c trace: switch position of headers to what Meson requires 2020-08-21 06:18:24 -04:00
job.c trace: switch position of headers to what Meson requires 2020-08-21 06:18:24 -04:00
memory_ldst.c.inc nomaintainer: Fix Lesser GPL version number 2020-11-15 17:04:40 +01:00
meson.build i386: move kvm accel files into kvm/ 2020-12-16 14:06:52 -05:00
meson_options.txt fuse: Implement hole detection through lseek 2020-12-11 17:52:40 +01:00
module-common.c all: Clean up includes 2016-02-04 17:41:30 +00:00
os-posix.c vl: relocate paths to data directories 2020-09-30 19:11:36 +02:00
os-win32.c vl: relocate paths to data directories 2020-09-30 19:11:36 +02:00
qemu-bridge-helper.c qemu-bridge-helper: relocate path to default ACL 2020-09-30 19:11:36 +02:00
qemu-edid.c qemu-edid: drop cast 2020-10-14 06:05:56 +02:00
qemu-img-cmds.hx qemu-img: add support for rate limit in qemu-img convert 2020-10-27 15:26:20 +01:00
qemu-img.c trace: remove argument from trace_init_file 2020-11-11 13:08:09 +00:00
qemu-io-cmds.c qemu-io-cmds: Simplify help_oneline 2020-10-02 15:46:40 +02:00
qemu-io.c trace: remove argument from trace_init_file 2020-11-11 13:08:09 +00:00
qemu-keymap.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
qemu-nbd.c trace: remove argument from trace_init_file 2020-11-11 13:08:09 +00:00
qemu-options-wrapper.h qemu-img: remove references to GEN_DOCS 2018-05-20 08:35:54 +03:00
qemu-options.h Clean up ill-advised or unusual header guards 2016-07-12 16:20:46 +02:00
qemu-options.hx Remove the deprecated -show-cursor option 2020-12-15 12:52:03 -05:00
qemu.nsi qemu.nsi: Install Sphinx documentation 2020-03-09 16:45:00 +00:00
qemu.sasl Default to GSSAPI (Kerberos) instead of DIGEST-MD5 for SASL 2017-05-09 14:41:47 +01:00
replication.c replication: Introduce new APIs to do replication operation 2016-09-13 11:00:56 +01:00
replication.h Include qemu/module.h where needed, drop it from qemu-common.h 2019-06-12 13:18:33 +02:00
thunk.c overall usermode...: Fix Lesser GPL version number 2020-11-15 16:43:40 +01:00
trace-events trace-events: Fix attribution of trace points to source 2020-09-09 17:17:58 +01:00
version.rc Use HTTPS for qemu.org and other domains 2017-11-21 13:34:13 +00:00

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.


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


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

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

.. code-block:: shell

   git clone https://git.qemu.org/git/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 CODING_STYLE.rst file.

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

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

The QEMU website is also maintained under source control.

.. code-block:: shell

  git clone https://git.qemu.org/git/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 Launchpad as its primary upstream bug tracker. Bugs
found when running code built from QEMU git or upstream released sources
should be reported via:

* `<https://bugs.launchpad.net/qemu/>`_

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:

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