Original Xbox Emulator for Windows, macOS, and Linux (Active Development)
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David Hildenbrand 01c26ad6af util/mmap-alloc: Factor out reserving of a memory region to mmap_reserve()
We want to reserve a memory region without actually populating memory.
Let's factor that out.

Reviewed-by: Igor Kotrasinski <i.kotrasinsk@partner.samsung.com>
Acked-by: Murilo Opsfelder Araujo <muriloo@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Xu <peterx@redhat.com>
Acked-by: Eduardo Habkost <ehabkost@redhat.com> for memory backend and machine core
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20210510114328.21835-3-david@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2021-06-15 20:27:37 +02:00
.github .github: point Repo Lockdown bot to GitLab repo 2021-02-09 20:53:56 +00:00
.gitlab-ci.d gitlab-ci: Split gprof-gcov job 2021-06-07 14:42:47 +01:00
accel tcg: Move tcg_init_ctx and tcg_ctx from accel/tcg/ 2021-06-13 17:42:40 -07:00
audio docs: fix references to docs/devel/tracing.rst 2021-06-02 06:51:09 +02:00
authz docs: fix references to docs/devel/tracing.rst 2021-06-02 06:51:09 +02:00
backends docs: fix references to docs/devel/tracing.rst 2021-06-02 06:51:09 +02:00
block block: use GDateTime for formatting timestamp when dumping snapshot info 2021-06-14 13:28:50 +01:00
bsd-user accel/tcg: Merge tcg_exec_init into tcg_init_machine 2021-06-11 09:26:28 -07:00
capstone@f8b1b83301 capstone: Update to upstream "next" branch 2020-10-03 04:23:14 -05:00
chardev docs: fix references to docs/devel/tracing.rst 2021-06-02 06:51:09 +02:00
contrib vhost-user-gpu: abstract vg_cleanup_mapping_iov 2021-05-27 11:55:59 +02:00
crypto crypto: drop used conditional check 2021-06-02 07:10:45 +02:00
default-configs hw/mem/nvdimm: Use Kconfig 'imply' instead of 'depends on' 2021-05-26 14:49:45 +02:00
disas disas/libvixl: Protect C system header for C++ compiler 2021-05-25 16:01:43 +01:00
docs Merge misc patches 2021-06-14 15:59:13 +01:00
dtc@85e5d83984 Makefile: dtc: update, build the libfdt target 2020-06-16 14:49:05 +01:00
dump Do not include cpu.h if it's not really necessary 2021-05-02 17:24:51 +02:00
ebpf ebpf: Added eBPF RSS loader. 2021-06-04 15:25:46 +08:00
fpu softfloat: Fix tp init in float32_exp2 2021-06-13 17:42:40 -07:00
fsdev meson: Declare have_virtfs_proxy_helper in main meson.build 2021-01-23 15:55:04 -05:00
gdb-xml target/riscv: Remove built-in GDB XML files for CSRs 2021-01-16 10:57:21 -08:00
hw esp: store lun coming from the MESSAGE OUT phase 2021-06-15 17:17:09 +02:00
include softmmu/physmem: Fix ram_block_discard_range() to handle shared anonymous memory 2021-06-15 20:27:37 +02:00
io sockets: Support multipath TCP 2021-06-08 19:36:22 +01:00
libdecnumber qemu/: fix some comment spelling errors 2020-09-17 20:35:43 +02:00
linux-headers target/i386/sev: add support to query the attestation report 2021-06-01 09:32:23 -04:00
linux-user tcg: Re-order tcg_region_init vs tcg_prologue_init 2021-06-11 09:26:28 -07:00
meson@776acd2a80 submodules: bump meson to 0.55.3 2020-10-17 10:45:42 -04:00
migration migration: use GDateTime for formatting timestamp in snapshot names 2021-06-14 13:28:50 +01:00
monitor monitor: removed cpustats command 2021-06-03 18:10:31 +10:00
nbd Block layer patches 2021-06-02 19:34:03 +01:00
net Fixed calculation error of pkt->header_size in fill_pkt_tcp_info() 2021-06-11 10:30:13 +08:00
pc-bios docs: fix references to docs/devel/s390-dasd-ipl.rst 2021-06-02 06:51:09 +02:00
plugins accel/tcg: Reduce 'exec/tb-context.h' inclusion 2021-05-26 15:31:45 -07:00
po configure: move gettext detection to meson.build 2021-01-02 21:03:09 +01:00
python python: add tox support 2021-06-01 16:21:21 -04:00
qapi netdev: add more commands to preconfig mode 2021-06-11 10:30:13 +08:00
qga qga: fix guest-get-disks regression 2021-04-20 16:27:45 +01:00
qobject qobject: braces {} are necessary for all arms of this statement 2021-02-04 13:20:29 +01:00
qom docs: fix references to docs/devel/tracing.rst 2021-06-02 06:51:09 +02:00
replay replay: notify CPU on event 2021-04-01 10:37:20 +02:00
roms roms/u-boot: Bump ppce500 u-boot to v2021.04 to fix broken pci support 2021-05-04 11:41:25 +10:00
scripts Trivial branch pull request 20210607 2021-06-07 20:05:29 +01:00
scsi docs: fix references to docs/devel/tracing.rst 2021-06-02 06:51:09 +02:00
semihosting Do not include cpu.h if it's not really necessary 2021-05-02 17:24:51 +02:00
slirp@8f43a99191 slirp: update to fix CVE-2020-29129 CVE-2020-29130 2020-11-27 20:57:11 +04:00
softmmu softmmu/physmem: Fix qemu_ram_remap() to handle shared anonymous memory 2021-06-15 20:27:37 +02:00
storage-daemon qsd: Document FUSE exports 2021-03-29 18:28:33 +02:00
stubs virtio-gpu: add blob resource support. 2021-05-30 18:33:43 +01:00
subprojects/libvhost-user build-sys: add libvhost-user missing dependencies 2021-01-23 09:26:41 -05:00
target Second RISC-V PR for QEMU 6.1 2021-06-08 13:54:23 +01:00
tcg tcg/arm: Fix tcg_out_op function signature 2021-06-13 17:42:40 -07:00
tests tests/vm: expose --source-path to scripts to find extra files 2021-06-07 14:42:47 +01:00
tools -----BEGIN PGP SIGNATURE----- 2021-06-04 13:38:49 +01:00
trace trace: fix "-trace file=..." 2021-03-06 11:42:57 +01:00
ui vnc: avoid deprecation warnings for SASL on OS X 2021-06-15 17:17:09 +02:00
util util/mmap-alloc: Factor out reserving of a memory region to mmap_reserve() 2021-06-15 20:27:37 +02:00
.cirrus.yml cirrus.yml: Fix the MSYS2 task 2021-05-14 13:11:48 +02:00
.dir-locals.el
.editorconfig .editorconfig: update the automatic mode setting for Emacs 2021-03-10 15:34:11 +00:00
.exrc
.gdbinit .gdbinit: load QEMU sub-commands when gdb starts 2017-06-07 14:38:45 +01:00
.gitattributes maint: Tell git that *.py files should use python diff hunks 2021-02-15 22:13:34 -05:00
.gitignore Makefile: add GNU global tags support 2021-01-18 10:04:31 +00:00
.gitlab-ci.yml gitlab: Run Avocado tests manually (except mainstream CI) 2021-05-27 16:39:23 +02:00
.gitmodules gitmodules: use GitLab repos instead of qemu.org 2021-02-09 20:53:56 +00:00
.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 patchew: move quick build job from CentOS 7 to CentOS 8 container 2021-06-02 06:58:46 +02:00
.readthedocs.yml readthedocs: build with Python 3.6 2020-10-05 16:30:45 +01:00
.travis.yml travis.yml: Limit simultaneous jobs to 3 2021-02-19 06:31:40 +01:00
block.c block: improve permission conflict error message 2021-06-02 14:23:20 +02:00
blockdev-nbd.c qemu-nbd: Use SOMAXCONN for socket listen() backlog 2021-02-12 07:42:08 -06:00
blockdev.c block: drop BlockBackendRootState::read_only 2021-06-02 14:23:20 +02:00
blockjob.c ratelimit: protect with a mutex 2021-05-04 14:15:35 +02:00
configure -----BEGIN PGP SIGNATURE----- 2021-06-04 13:38:49 +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
cpu.c cpu: Move CPUClass::vmsd to SysemuCPUOps 2021-05-26 15:33:59 -07:00
cpus-common.c overall/alpha tcg cpus|hppa: Fix Lesser GPL version number 2020-11-15 16:43:54 +01:00
disas.c Do not include cpu.h if it's not really necessary 2021-05-02 17:24:51 +02:00
gdbstub.c gdbstub: tidy away reverse debugging check into function 2021-05-25 16:52:50 +01:00
gitdm.config contrib: gitdm: add a mapping for Janus Technologies 2019-03-12 19:31:29 +00:00
hmp-commands-info.hx hmp: Add "calc_dirty_rate" and "info dirty_rate" cmds 2021-06-08 20:18:26 +01:00
hmp-commands.hx netdev: add more commands to preconfig mode 2021-06-11 10:30:13 +08:00
iothread.c multi-process: define MPQemuMsg format and transmission functions 2021-02-10 09:23:28 +00:00
job-qmp.c qapi: Use QAPI_LIST_APPEND in trivial cases 2021-01-28 08:08:45 +01:00
job.c mirror: stop cancelling in-flight requests on non-force cancel in READY 2021-05-14 16:14:10 +02:00
Kconfig semihosting: Move hw/semihosting/ -> semihosting/ 2021-03-10 15:34:12 +00:00
Kconfig.host multi-process: Add config option for multi-process QEMU 2021-02-09 20:53:56 +00:00
LICENSE tcg/LICENSE: Remove out of date claim about TCG subdirectory licensing 2019-11-11 15:11:21 +01:00
MAINTAINERS -----BEGIN PGP SIGNATURE----- 2021-06-04 13:38:49 +01:00
Makefile configure: simplify assignment to GIT_SUBMODULES 2021-05-26 14:49:45 +02:00
memory_ldst.c.inc exec/memory_ldst: Use correct type sizes 2021-05-26 08:35:51 -07:00
meson_options.txt ebpf: Added eBPF RSS loader. 2021-06-04 15:25:46 +08:00
meson.build meson: Split out fpu/meson.build 2021-06-11 09:26:28 -07:00
module-common.c all: Clean up includes 2016-02-04 17:41:30 +00:00
os-posix.c remove qemu-options* from root directory 2021-05-26 14:49:46 +02:00
os-win32.c remove qemu-options* from root directory 2021-05-26 14:49:46 +02:00
page-vary-common.c exec: Build page-vary-common.c with -fno-lto 2021-03-23 19:36:47 -06:00
page-vary.c exec: Build page-vary-common.c with -fno-lto 2021-03-23 19:36:47 -06:00
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: use qemu_edid_size() 2021-05-10 11:41:02 +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 qemu-img convert: Unshare write permission for source 2021-04-30 12:27:48 +02:00
qemu-io-cmds.c qemu-io-cmds: assert that we don't have .perm requested in no-blk case 2021-06-02 14:23:20 +02:00
qemu-io.c monitor: hmp_qemu_io: acquire aio contex, fix crash 2021-05-14 16:14:10 +02:00
qemu-keymap.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
qemu-nbd.c qemu-nbd: Use user_creatable_process_cmdline() for --object 2021-03-19 10:17:14 +01:00
qemu-options.hx doc: Add notes about -mon option mode=control argument. 2021-05-26 14:49:58 +02:00
qemu.nsi nsis: adjust for new MinGW paths 2021-01-23 15:55:05 -05:00
qemu.sasl sasl: remove comment about obsolete kerberos versions 2021-06-14 13:28:50 +01:00
README.rst README: Add Documentation blurb 2021-03-12 15:46:30 +01:00
replication.c replication: move include out of root directory 2021-05-26 14:49:46 +02:00
thunk.c overall usermode...: Fix Lesser GPL version number 2020-11-15 16:43:40 +01:00
trace-events docs: fix references to docs/devel/tracing.rst 2021-06-02 06:51:09 +02:00
VERSION Open 6.1 development tree 2021-04-30 11:15:40 +01:00
version.rc configure: remove CONFIG_FILEVERSION and CONFIG_PRODUCTVERSION 2021-01-02 21:03:37 +01:00

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