QEMU With E2K User Support
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Richard Henderson 45e1b74694 gitlab-ci/custom-runners: Disable -static-pie for ubuntu-20.04-aarch64
The project has reached the magic size at which we see

/usr/aarch64-linux-gnu/lib/libc.a(init-first.o): in function `__libc_init_first':
(.text+0x10): relocation truncated to fit: R_AARCH64_LD64_GOTPAGE_LO15 against \
symbol `__environ' defined in .bss section in /usr/aarch64-linux-gnu/lib/libc.a(environ.o)
/usr/bin/ld: (.text+0x10): warning: too many GOT entries for -fpic, please recompile with -fPIC

The bug has been reported upstream, but in the meantime there is
nothing we can do except build a non-pie executable.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20220823210329.1969895-1-richard.henderson@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20220914155950.804707-20-alex.bennee@linaro.org>
2022-09-20 17:22:08 +01:00
.github/workflows
.gitlab/issue_templates
.gitlab-ci.d gitlab-ci/custom-runners: Disable -static-pie for ubuntu-20.04-aarch64 2022-09-20 17:22:08 +01:00
accel accel/tcg: Add fast path for translator_ld* 2022-09-06 08:04:26 +01:00
audio audio: exit(1) if audio backend failed to be found or initialized 2022-09-02 15:54:47 +04:00
authz
backends tpm_emulator: Have swtpm relock storage upon migration fall-back 2022-09-13 10:27:17 -04:00
block block/io_uring: add missing include file 2022-08-02 11:01:24 +02:00
bsd-user bsd-user: Remove stray 'inline' from do_bsd_close 2022-07-02 07:52:48 -06:00
chardev chardev/char-socket: Update AF_UNIX for Windows 2022-09-02 15:54:46 +04:00
common-user common-user: Only compile the common user code if have_user is set 2022-06-28 11:12:05 +02:00
configs target/openrisc: Enable MTTCG 2022-09-04 07:02:57 +01:00
contrib contrib/vhost-user-blk: Clean up deallocation of VuVirtqElement 2022-08-08 07:19:26 +02:00
crypto crypto: Make block callbacks return 0 on success 2022-07-12 12:14:55 +02:00
disas target/riscv: fix shifts shamt value for rv128c 2022-09-07 09:18:32 +02:00
docs target/arm: Report FEAT_PMUv3p5 for TCG '-cpu max' 2022-09-14 11:19:40 +01:00
dtc@b6910bec11
dump
ebpf ebpf: replace deprecated bpf_program__set_socket_filter 2022-07-06 11:39:09 +08:00
fpu fpu: Add rebias bool, value and operation 2022-08-31 14:08:05 -03:00
fsdev
gdb-xml target/loongarch: Update loongarch-fpu.xml 2022-08-05 10:02:40 -07:00
hw Add cortex-a35. 2022-09-17 10:29:47 -04:00
include Convert m68k to semihosting/syscalls.h. 2022-09-17 10:30:34 -04:00
io QIOChannelSocket: Add support for MSG_ZEROCOPY + IPV6 2022-08-05 16:18:15 +01:00
libdecnumber
linux-headers kvm: add support for boolean statistics 2022-07-18 18:51:32 +02:00
linux-user linux-user: Clear translations on mprotect() 2022-09-06 08:04:25 +01:00
meson@12f9f04ba0
migration migration: Define BLK_MIG_BLOCK_SIZE as unsigned long long 2022-08-02 16:46:52 +01:00
monitor monitor/hmp: print trace as option in help for log command 2022-09-15 12:19:08 +01:00
nbd block: Change blk_{pread,pwrite}() param order 2022-07-12 12:14:56 +02:00
net net/colo.c: Fix the pointer issue reported by Coverity. 2022-09-02 10:22:39 +08:00
pc-bios roms/opensbi: Upgrade from v1.0 to v1.1 2022-09-07 09:18:32 +02:00
plugins meson: remove dead assignments 2022-09-01 07:42:37 +02:00
po po: add ukrainian translation 2022-07-05 10:15:49 +02:00
python misc: fix commonly doubled up words 2022-08-01 11:58:02 +02:00
qapi qapi: fix examples of events missing timestamp 2022-09-07 15:10:13 +02:00
qga qga: treat get-guest-fsinfo as "best effort" 2022-07-18 20:24:36 +02:00
qobject
qom
replay
roms roms/opensbi: Upgrade from v1.0 to v1.1 2022-09-07 09:18:32 +02:00
scripts scripts/coverity-scan/COMPONENTS.md: Update slirp component info 2022-07-26 13:37:44 +01:00
scsi
semihosting semihosting: Allow optional use of semihosting from userspace 2022-09-13 17:18:21 +01:00
slirp@9d59bb775d
softmmu semihosting: Allow optional use of semihosting from userspace 2022-09-13 17:18:21 +01:00
storage-daemon qsd: Unlink absolute PID file path 2022-07-12 14:30:38 +02:00
stubs semihosting: Allow optional use of semihosting from userspace 2022-09-13 17:18:21 +01:00
subprojects libvduse: Pass positive value to strerror() 2022-08-02 11:01:42 +02:00
target Convert m68k to semihosting/syscalls.h. 2022-09-17 10:30:34 -04:00
tcg misc: fix commonly doubled up words 2022-08-01 11:58:02 +02:00
tests tests/vm: Remove obsolete Fedora VM test 2022-09-20 16:27:39 +01:00
tools virtiofsd: Fix format strings 2022-08-04 14:44:25 -04:00
trace
ui ui/console: fix qemu_console_resize() regression 2022-08-18 10:46:55 +04:00
util -----BEGIN PGP SIGNATURE----- 2022-09-02 13:23:32 -04:00
.cirrus.yml ci: Upgrade msys2 release to 20220603 2022-07-29 10:33:29 -07:00
.dir-locals.el
.editorconfig
.exrc
.gdbinit
.gitattributes
.gitignore
.gitlab-ci.yml
.gitmodules vfio-user: build library 2022-06-15 16:42:33 +01:00
.gitpublish
.mailmap
.patchew.yml
.readthedocs.yml
.travis.yml Revert "gitlab: disable accelerated zlib for s390x" 2022-07-20 12:15:09 +01:00
block.c block: Change blk_{pread,pwrite}() param order 2022-07-12 12:14:56 +02:00
blockdev-nbd.c
blockdev.c
blockjob.c
configure configure: explicitly set cflags for --disable-pie 2022-09-20 17:22:04 +01:00
COPYING
COPYING.LIB
cpu.c
cpus-common.c cpus: Introduce cpu_list_generation_id 2022-07-20 12:15:08 +01:00
disas.c disas: Remove libvixl disassembler 2022-07-05 10:15:49 +02:00
event-loop-base.c
gdbstub.c gdbstub: Adjust gdb_syscall_complete_cb declaration 2022-06-28 04:35:52 +05:30
gitdm.config
hmp-commands-info.hx monitor: Support specified vCPU registers 2022-09-15 11:58:37 +01:00
hmp-commands.hx hmp: Fix ordering of text 2022-09-15 14:13:30 +01:00
iothread.c
job-qmp.c
job.c
Kconfig
Kconfig.host vfio-user: build library 2022-06-15 16:42:33 +01:00
LICENSE
MAINTAINERS ppc/ppc405: Remove taihu machine 2022-08-31 14:08:06 -03:00
Makefile cutils: Introduce bundle mechanism 2022-07-13 16:58:57 +02:00
memory_ldst.c.inc
meson_options.txt meson: be strict for boolean options 2022-09-01 07:42:37 +02:00
meson.build * SCSI fixes for Mac OS 9 2022-09-02 13:24:28 -04:00
module-common.c
os-posix.c
os-win32.c
page-vary-common.c
page-vary.c
qemu-bridge-helper.c
qemu-edid.c
qemu-img-cmds.hx
qemu-img.c block: Change blk_pwrite_compressed() param order 2022-07-12 12:14:56 +02:00
qemu-io-cmds.c block: Change blk_pwrite_compressed() param order 2022-07-12 12:14:56 +02:00
qemu-io.c
qemu-keymap.c
qemu-nbd.c
qemu-options.hx semihosting: Allow optional use of semihosting from userspace 2022-09-13 17:18:21 +01:00
qemu.nsi
qemu.sasl
README.rst README.rst: fix link formatting 2022-08-04 13:44:21 +02:00
replication.c
trace-events
VERSION Open 7.2 development tree 2022-08-30 09:40:41 -07:00
version.rc

===========
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>`_