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Vladimir Sementsov-Ogievskiy a9e750e1ce qcow2_format: refactor QcowHeaderExtension as a subclass of Qcow2Struct
Only two fields we can parse by generic code, but that is better than
nothing. Keep further refactoring of variable-length fields for another
day.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com>
Message-Id: <20200606081806.23897-12-vsementsov@virtuozzo.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
2020-06-09 15:47:09 -05:00
.github .github: Enable repo-lockdown bot to refuse GitHub pull requests 2020-04-07 16:19:18 +01:00
.gitlab-ci.d gitlab-ci: Move edk2 and opensbi YAML files to .gitlab-ci.d folder 2020-05-28 11:00:39 +02:00
accel accel/tcg: Provide a NetBSD specific aarch64 cpu_signal_handler 2020-06-02 08:42:37 -07:00
audio audio: Let capture_callback handler use const buffer argument 2020-05-26 08:29:39 +02:00
authz qom: Drop parameter @errp of object_property_add() & friends 2020-05-15 07:07:58 +02:00
backends machine queue, 2020-05-13 2020-06-02 10:25:55 +01:00
block block: Factor out bdrv_run_co() 2020-06-05 09:54:48 +01:00
bsd-user exec/cpu-all: Use bool for have_guest_base 2020-05-15 15:25:16 +01:00
capstone@22ead3e0bf disas: Add capstone as submodule 2017-10-26 11:56:20 +02:00
chardev error: Use error_reportf_err() where appropriate 2020-05-27 07:45:30 +02:00
contrib vhost-user-gpu: Release memory returned by vu_queue_pop() with free() 2020-04-15 19:00:39 +01:00
crypto qom: Drop parameter @errp of object_property_add() & friends 2020-05-15 07:07:58 +02:00
default-configs riscv: Initial commit of OpenTitan machine 2020-06-03 09:11:51 -07:00
disas target/mips: Add implementation of GINVT instruction 2020-01-29 19:28:52 +01:00
docs qemu-img: Fix doc typo for 'bitmap' subcommand 2020-06-09 15:47:09 -05:00
dtc@88f18909db Update dtc/libfdt submodule to v1.4.7 2018-10-02 13:53:26 +10:00
dump various: Remove suspicious '\' character outside of #define in C code 2020-04-29 08:01:51 +02:00
fpu softfloat: Return bool from all classification predicates 2020-05-19 08:43:05 -07:00
fsdev virtfs-proxy-helper: Make the helper_opts[] array const 2020-03-09 15:59:31 +01:00
gdb-xml target/arm: Use correct GDB XML for M-profile cores 2020-05-14 15:03:08 +01:00
hw hw/timer/grlib_gptimer: Display frequency in decimal 2020-06-09 09:21:10 +02:00
include hw/misc/empty_slot: Name the slots when created 2020-06-09 06:59:44 +02:00
io io: Fix qio_channel_socket_close() error handling 2020-04-29 08:01:52 +02:00
libdecnumber build: remove CONFIG_LIBDECNUMBER 2017-10-16 18:03:52 +02:00
linux-headers linux-headers: update against Linux 5.7-rc3 2020-04-28 12:29:01 +02:00
linux-user linux-user pull request 20200605-v2 2020-06-08 11:04:57 +01:00
migration migration/migration.c: Fix hang in ram_save_host_page 2020-06-01 18:44:27 +01:00
monitor various: Remove unnecessary OBJECT() cast 2020-05-15 07:08:14 +02:00
nbd nbd/server: use bdrv_dirty_bitmap_next_dirty_area 2020-03-18 14:03:46 -04:00
net qom: Drop parameter @errp of object_property_add() & friends 2020-05-15 07:07:58 +02:00
pc-bios Update OpenBIOS images to 4704d9eb built from submodule. 2020-05-21 21:00:39 +01:00
plugins qemu/qemu-plugin: Make qemu_plugin_hwaddr_is_io() hwaddr argument const 2020-05-15 15:25:16 +01:00
po ui/gtk: fix gettext message's charset. 2019-11-21 09:42:30 +01:00
python/qemu python/qemu/qtest: Check before accessing _qtest 2020-05-31 18:25:31 +02:00
qapi qcow2: Expose bitmaps' size during measure 2020-05-28 13:16:16 -05:00
qga qga: Fix qmp_guest_suspend_{disk, ram}() error handling 2020-04-29 08:01:52 +02:00
qobject qobject: Eliminate qdict_iter(), use qdict_first(), qdict_next() 2020-04-30 06:51:15 +02:00
qom hmp: Simplify qom-set 2020-06-01 18:44:27 +01:00
replay replay: record and replay random number sources 2020-01-07 12:08:39 +01:00
roms Update OpenBIOS images to 4704d9eb built from submodule. 2020-05-21 21:00:39 +01:00
scripts python: remove more instances of sys.version_info 2020-05-31 18:25:07 +02:00
scsi error: Use error_reportf_err() where appropriate 2020-05-27 07:45:30 +02:00
slirp@2faae0f778 slirp: update to fix CVE-2020-1983 2020-04-21 18:39:20 +01:00
softmmu fuzz: add datadir for oss-fuzz compatability 2020-06-05 09:54:48 +01:00
storage-daemon qemu-storage-daemon: Add --monitor option 2020-03-06 17:21:28 +01:00
stubs stubs: Restrict ui/win32-kbd-hook to system-mode 2020-06-05 21:23:22 +02:00
target target/sparc/int32_helper: Extract and use excp_name_str() 2020-06-09 09:21:10 +02:00
tcg tcg: Improve move ops in liveness_pass_2 2020-06-02 08:42:37 -07:00
tests qcow2_format: refactor QcowHeaderExtension as a subclass of Qcow2Struct 2020-06-09 15:47:09 -05:00
tools/virtiofsd virtiofsd: remove symlink fallbacks 2020-06-01 18:44:27 +01:00
trace tracing: only allow -trace to override -D if set 2020-02-25 20:20:23 +00:00
ui audio: Let capture_callback handler use const buffer argument 2020-05-26 08:29:39 +02:00
util util/Makefile: Reduce the user-mode object list 2020-06-05 21:23:22 +02:00
.cirrus.yml .cirrus.yml: bootstrap pkg unconditionally 2020-05-06 09:29:03 +01:00
.dir-locals.el Add .dir-locals.el file to configure emacs coding style 2015-10-08 19:46:01 +03:00
.editorconfig editorconfig: add setting for shell scripts 2019-06-12 17:53:22 +01:00
.exrc
.gdbinit .gdbinit: load QEMU sub-commands when gdb starts 2017-06-07 14:38:45 +01:00
.gitignore docs: Stop building qemu-doc 2020-03-06 11:06:55 +00:00
.gitlab-ci.yml gitlab-ci: Determine the number of jobs dynamically 2020-05-28 11:01:38 +02:00
.gitmodules hw/ppc/prep: Remove the deprecated "prep" machine and the OpenHackware BIOS 2020-02-02 14:07:57 +11:00
.gitpublish Add a git-publish configuration file 2018-03-05 09:03:17 +00:00
.mailmap MAINTAINERS: Change Aleksandar Rikalo's email address 2020-05-26 13:21:12 +02:00
.patchew.yml ci: store Patchew configuration in the tree 2019-06-03 14:03:02 +02:00
.readthedocs.yml .readthedocs.yml: specify some minimum python requirements 2020-02-07 15:15:16 +01:00
.shippable.yml .shippable: --disable-docs for cross-compile tests 2020-02-04 17:13:29 +00:00
.travis.yml travis.yml: Use clang++ in the Clang tests 2020-05-27 14:26:47 +01:00
arch_init.c arch_init: Remove unused 'qapi-commands-misc.h' include 2020-06-05 21:23:22 +02:00
balloon.c Clean up inclusion of exec/cpu-common.h 2019-08-16 13:31:52 +02:00
block.c block: Drop @child_class from bdrv_child_perm() 2020-05-18 19:05:25 +02:00
blockdev-nbd.c blockdev-nbd: Boxed argument type for nbd-server-add 2020-03-06 17:21:28 +01:00
blockdev.c blockdev: Split off basic bitmap operations for qemu-img 2020-05-19 10:32:14 -05:00
blockjob.c block: Add BdrvChildRole to BdrvChild 2020-05-18 19:05:25 +02:00
bootdevice.c Drop more @errp parameters after previous commit 2020-05-15 07:08:14 +02:00
Changelog Use HTTPS for qemu.org and other domains 2017-11-21 13:34:13 +00:00
CODING_STYLE.rst docs: split the CODING_STYLE doc into distinct groups 2019-09-05 14:41:00 +01:00
configure linux-user pull request 20200605-v2 2020-06-08 11:04:57 +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
cpus-common.c cpus-common: ensure auto-assigned cpu_indexes don't clash 2020-05-27 14:26:49 +01:00
cpus.c cpus: Proper range-checking for -icount shift=N 2020-04-29 08:01:52 +02:00
device_tree.c device_tree: Constify compat in qemu_fdt_node_path() 2020-04-30 15:35:41 +01:00
disas.c disas: add optional note support to cap_disas 2020-05-15 15:25:16 +01:00
dma-helpers.c Avoid address_space_rw() with a constant is_write argument 2020-02-20 14:47:08 +01:00
exec-vary.c exec: Cache TARGET_PAGE_MASK for TARGET_PAGE_BITS_VARY 2019-10-28 10:35:20 +01:00
exec.c linux-user pull request 20200605-v2 2020-06-08 11:04:57 +01:00
gdbstub.c gdbstub/linux-user: support debugging over a unix socket 2020-05-06 09:29:26 +01:00
gitdm.config contrib: gitdm: add a mapping for Janus Technologies 2019-03-12 19:31:29 +00:00
hmp-commands-info.hx Update comments in .hx files that mention Texinfo 2020-03-12 11:14:05 +00:00
hmp-commands.hx hmp: Simplify qom-set 2020-06-01 18:44:27 +01:00
ioport.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
iothread.c qom: Drop parameter @errp of object_property_add() & friends 2020-05-15 07:07:58 +02:00
job-qmp.c job: take each job's lock individually in job_txn_apply 2020-04-07 14:34:47 +02:00
job.c job: take each job's lock individually in job_txn_apply 2020-04-07 14:34:47 +02:00
Kconfig.host configure: simplify vhost condition with Kconfig 2019-12-17 19:32:48 +01:00
LICENSE tcg/LICENSE: Remove out of date claim about TCG subdirectory licensing 2019-11-11 15:11:21 +01:00
MAINTAINERS hw/misc/empty_slot: Move the 'hw/misc' and cover in MAINTAINERS 2020-06-09 06:59:44 +02:00
Makefile Makefile: Only build virtiofsd if system-mode is enabled 2020-06-05 21:23:22 +02:00
Makefile.objs blockdev: Split off basic bitmap operations for qemu-img 2020-05-19 10:32:14 -05:00
Makefile.target update syscall numbers to linux 5.5 (with scripts) 2020-03-20 16:00:21 +00:00
memory_ldst.inc.c memory: Single byte swap along the I/O path 2019-09-03 08:30:39 -07:00
memory_mapping.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
memory.c exec: Rename qemu_ram_writeback() as qemu_ram_msync() 2020-06-05 09:54:48 +01:00
module-common.c all: Clean up includes 2016-02-04 17:41:30 +00:00
os-posix.c os-posix: simplify os_find_datadir 2019-12-17 19:32:47 +01:00
os-win32.c glib: use portable g_setenv() 2019-12-17 09:05:23 +01:00
qdev-monitor.c qom: Drop parameter @errp of object_property_add() & friends 2020-05-15 07:07:58 +02:00
qemu-bridge-helper.c build: rename CONFIG_LIBCAP to CONFIG_LIBCAP_NG 2019-12-17 19:35:47 +01:00
qemu-edid.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
qemu-img-cmds.hx qemu-img: Add convert --bitmaps option 2020-05-28 13:16:30 -05:00
qemu-img.c qemu-img: Add convert --bitmaps option 2020-05-28 13:16:30 -05:00
qemu-io-cmds.c block-backend: Add flags to blk_truncate() 2020-04-30 17:51:07 +02:00
qemu-io.c qemu-io: adds option to use aio engine 2020-01-30 20:59:42 +00:00
qemu-keymap.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
qemu-nbd.c error: Use error_reportf_err() where appropriate 2020-05-27 07:45:30 +02:00
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 qemu-options: updates for abstract unix sockets 2020-05-20 10:34:53 +01:00
qemu-seccomp.c seccomp: report more useful errors from seccomp 2019-03-27 13:11:38 +01:00
qemu-storage-daemon.c qemu-storage-daemon: Fix non-string --object properties 2020-04-30 17:51:07 +02:00
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
qtest.c qtest: fix fuzzer-related 80-char limit violations 2020-03-06 10:33:26 +00:00
README.rst docs: merge HACKING.rst contents into CODING_STYLE.rst 2019-09-05 14:27:06 +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
rules.mak build-sys: Move the print-variable rule to rules.mak 2020-03-09 15:59:31 +01:00
thunk.c thunk: improve readability of allocation loop 2019-03-11 18:48:20 +01:00
tpm.c tpm: Clean up error reporting in tpm_init_tpmdev() 2018-10-19 14:51:34 +02:00
trace-events trace: add mmu_index to mem_info 2019-10-28 15:12:38 +00:00
VERSION Open 5.1 development tree 2020-04-29 15:07:10 +01:00
version.rc Use HTTPS for qemu.org and other domains 2017-11-21 13:34:13 +00:00

===========
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.


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>`_


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>`_