Go to file
Max Reitz 9eab154415 block: Add *tighten_restrictions to *check*_perm()
This patch makes three functions report whether the necessary permission
change tightens restrictions or not.  These functions are:
- bdrv_check_perm()
- bdrv_check_update_perm()
- bdrv_child_check_perm()

Callers can use this result to decide whether a failure is fatal or not
(see the next patch).

Signed-off-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2019-06-18 16:41:10 +02:00
accel Fix vector arithmetic right shift helpers. 2019-06-13 12:57:04 +01:00
audio Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
authz Include qemu/module.h where needed, drop it from qemu-common.h 2019-06-12 13:18:33 +02:00
backends Include qemu/module.h where needed, drop it from qemu-common.h 2019-06-12 13:18:33 +02:00
block block/commit: Drop bdrv_child_try_set_perm() 2019-06-18 16:41:10 +02:00
bsd-user Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
capstone@22ead3e0bf disas: Add capstone as submodule 2017-10-26 11:56:20 +02:00
chardev monitor: Replace monitor_init() with monitor_init_{hmp, qmp}() 2019-06-18 08:14:17 +02:00
contrib vhost-user-gpu: initialize msghdr & iov at declaration 2019-06-16 16:16:52 -04:00
crypto Normalize position of header guard 2019-06-12 13:20:20 +02:00
default-configs hw/acpi: Consolidate build_mcfg to pci.c 2019-05-29 18:00:57 -04:00
disas Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
docs monitor: Move {hmp, qmp}.c to monitor/{hmp, qmp}-cmds.c 2019-06-17 20:36:56 +02:00
dtc@88f18909db Update dtc/libfdt submodule to v1.4.7 2018-10-02 13:53:26 +10:00
fpu hardfloat: fix float32/64 fused multiply-add 2019-03-25 10:35:32 +00:00
fsdev Include qemu/module.h where needed, drop it from qemu-common.h 2019-06-12 13:18:33 +02:00
gdb-xml RISC-V: Add 64-bit gdb xml files. 2019-03-19 05:13:24 -07:00
hw hw/intc/arm_gicv3: GICD_TYPER.SecurityExtn is RAZ if GICD_CTLR.DS == 1 2019-06-17 15:13:19 +01:00
include block: Add bdrv_child_refresh_perms() 2019-06-18 16:41:10 +02:00
io Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
libdecnumber build: remove CONFIG_LIBDECNUMBER 2017-10-16 18:03:52 +02:00
linux-headers linux headers: update against Linux 5.2-rc1 2019-05-21 16:58:56 +02:00
linux-user semihosting: split console_out into string and char versions 2019-06-12 17:53:22 +01:00
migration Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
monitor block/block-backend: blk_iostatus_reset: drop usage of bs->job 2019-06-18 16:41:10 +02:00
nbd nbd/server: Nicer spelling of max BLOCK_STATUS reply length 2019-06-13 08:56:10 -05:00
net Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
pc-bios pc-bios: update the README file with edk2-stable201905 information 2019-06-14 21:48:00 +02:00
po po/Makefile: Modern shell scripting (use $() instead of ``) 2018-10-24 07:39:10 +01:00
python/qemu event_match: always match on None value 2019-06-14 14:16:57 +02:00
qapi blkdebug: Inject errors on .bdrv_co_block_status() 2019-06-14 14:16:57 +02:00
qga Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
qobject qemu-common: Move qemu_isalnum() etc. to qemu/ctype.h 2019-06-11 20:22:09 +02:00
qom Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
replay Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
roms roms/Makefile.edk2: update input file list for "pc-bios/edk2-licenses.txt" 2019-06-14 21:47:53 +02:00
scripts decodetree: Fix comparison of Field 2019-06-13 15:14:03 +01:00
scsi Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
slirp@f0da672620 Update upstream slirp 2019-05-09 09:58:57 +02:00
stubs monitor: Replace monitor_init() with monitor_init_{hmp, qmp}() 2019-06-18 08:14:17 +02:00
target target/arm: Only implement doubles if the FPU supports them 2019-06-17 15:15:06 +01:00
tcg Supply missing header guards 2019-06-12 13:20:21 +02:00
tests block: drop bs->job 2019-06-18 16:41:10 +02:00
trace Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
ui ui/cocoa: Fix mouse grabbing in fullscreen mode for relative input device 2019-06-13 11:23:22 +01:00
util Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
.cirrus.yml cirrus / travis: Add gnu-sed and bash for macOS and FreeBSD 2019-05-21 10:12:47 +02:00
.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 Makefile: install the edk2 firmware images and their descriptors 2019-04-17 15:38:35 +02:00
.gitlab-ci.yml gitlab-ci.yml: Test the TCG interpreter in a CI pipeline 2019-05-02 16:56:33 +02:00
.gitmodules gitmodules: use qemu.org git mirrors 2019-05-03 13:56:56 +01:00
.gitpublish Add a git-publish configuration file 2018-03-05 09:03:17 +00:00
.mailmap maint: Grammar fix to mailmap 2018-12-11 18:35:54 +01:00
.patchew.yml ci: store Patchew configuration in the tree 2019-06-03 14:03:02 +02:00
.shippable.yml .shippable.yml: disable the win cross tests 2018-12-17 13:02:12 +00:00
.travis.yml .travis.yml: add clang ubsan job 2019-06-12 17:53:22 +01:00
arch_init.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
balloon.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
block.c block: Add *tighten_restrictions to *check*_perm() 2019-06-18 16:41:10 +02:00
blockdev-nbd.c nbd: allow authorization with nbd-server-start QMP command 2019-03-06 11:05:27 -06:00
blockdev.c block: drop bs->job 2019-06-18 16:41:10 +02:00
blockjob.c block: drop bs->job 2019-06-18 16:41:10 +02:00
bootdevice.c fw_cfg: ignore suffixes in the bootdevice list dependent on machine class 2018-08-16 22:27:43 -03:00
bt-host.c all: Clean up includes 2016-02-04 17:41:30 +00:00
bt-vhci.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
Changelog Use HTTPS for qemu.org and other domains 2017-11-21 13:34:13 +00:00
CODING_STYLE CODING_STYLE: indent example code as all others 2019-05-02 18:12:58 +02:00
configure configure: remove tpm_passthrough & tpm_emulator 2019-06-03 14:03:02 +02:00
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 qemu/queue.h: simplify reverse access to QTAILQ 2019-01-11 15:46:55 +01:00
cpus.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
device_tree.c device_tree: Fix integer overflowing in load_device_tree() 2019-04-09 16:35:40 -07:00
device-hotplug.c hmp: Fix drive_add ... format=help crash 2019-04-08 17:42:06 +02:00
disas.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
dma-helpers.c block: explicitly acquire aiocontext in bottom halves that need it 2017-02-21 11:39:39 +00:00
dump.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
exec.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
gdbstub.c monitor: Replace monitor_init() with monitor_init_{hmp, qmp}() 2019-06-18 08:14:17 +02:00
gitdm.config contrib: gitdm: add a mapping for Janus Technologies 2019-03-12 19:31:29 +00:00
HACKING HACKING: document preference for g_new instead of g_malloc 2018-05-20 08:32:09 +03:00
hmp-commands-info.hx {hmp, hw/pvrdma}: Expose device internals via monitor interface 2019-03-16 15:52:44 +02:00
hmp-commands.hx monitor: Rename HMP command type and tables 2019-06-17 20:36:56 +02:00
hmp.h Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
ioport.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
iothread.c iothread: document about why we need explicit aio_poll() 2019-03-08 10:20:57 +00:00
job-qmp.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
job.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
Kconfig.host kconfig: add dependencies on CONFIG_MSI_NONBROKEN 2019-03-18 09:39:57 +01:00
LICENSE vfio: move hw/misc/vfio.c to hw/vfio/pci.c Move vfio.h into include/hw/vfio 2014-12-19 15:24:06 -07:00
MAINTAINERS monitor: Split out monitor/monitor.c 2019-06-18 08:14:17 +02:00
Makefile docs: Build and install specs manual 2019-06-17 15:35:31 +01:00
Makefile.objs monitor: Split out monitor/qmp.c 2019-06-17 20:36:56 +02:00
Makefile.target Move monitor.c to monitor/misc.c 2019-06-17 20:36:56 +02:00
memory_ldst.inc.c exec: Fix MAP_RAM for cached access 2018-06-28 19:05:30 +02:00
memory_mapping.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
memory.c qemu-common: Move tcg_enabled() etc. to sysemu/tcg.h 2019-06-11 20:22:09 +02:00
module-common.c all: Clean up includes 2016-02-04 17:41:30 +00:00
numa.c numa: improve cpu hotplug error message with a wrong node-id 2019-06-07 15:28:46 -03:00
os-posix.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
os-win32.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
qdev-monitor.c monitor: Simplify how -device/device_add print help 2019-04-18 22:18:59 +02:00
qemu-bridge-helper.c qemu-bridge-helper: Fix misuse of isspace() 2019-05-22 14:57:33 +02:00
qemu-deprecated.texi vl: Deprecate -mon pretty=... for HMP monitors 2019-06-18 08:14:17 +02:00
qemu-doc.texi docs: add Security chapter to the documentation 2019-05-10 10:53:52 +01:00
qemu-edid.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
qemu-ga.texi doc: fix the configuration path 2019-05-03 13:03:04 +02:00
qemu-img-cmds.hx qemu-img: Add salvaging mode to convert 2019-06-14 14:16:57 +02:00
qemu-img.c qemu-img: Add salvaging mode to convert 2019-06-14 14:16:57 +02:00
qemu-img.texi qemu-img: Add salvaging mode to convert 2019-06-14 14:16:57 +02:00
qemu-io-cmds.c qemu-io-cmds: use clock_gettime for benchmarking 2019-06-12 17:53:22 +01:00
qemu-io.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +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: Do not close stderr 2019-06-13 08:50:47 -05:00
qemu-nbd.texi qemu-nbd: Add --pid-file option 2019-06-13 08:50:47 -05:00
qemu-option-trace.texi qemu-option-trace: -trace enable= is a pattern, not a file 2018-05-20 08:29:01 +03:00
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 docs: smbios: remove family=x from type2 entry description 2019-05-29 18:00:57 -04:00
qemu-seccomp.c seccomp: report more useful errors from seccomp 2019-03-27 13:11:38 +01:00
qemu-tech.texi qemu-tech.texi: Remove "QEMU compared to other emulators" section 2019-06-17 15:35:31 +01:00
qemu.nsi Use HTTPS for qemu.org and other domains 2017-11-21 13:34:13 +00:00
qemu.sasl Default to GSSAPI (Kerberos) instead of DIGEST-MD5 for SASL 2017-05-09 14:41:47 +01:00
qtest.c Include qemu/module.h where needed, drop it from qemu-common.h 2019-06-12 13:18:33 +02:00
README README: use 'https://' instead of 'git://' 2018-11-12 11:26:02 +00:00
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 contrib: add vhost-user-gpu 2019-05-29 06:30:45 +02:00
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 Move monitor.c to monitor/misc.c 2019-06-17 20:36:56 +02:00
VERSION Open 4.1 development tree 2019-04-24 10:12:22 +01:00
version.rc Use HTTPS for qemu.org and other domains 2017-11-21 13:34:13 +00:00
vl.c vl: Deprecate -mon pretty=... for HMP monitors 2019-06-18 08:14:17 +02:00
win_dump.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
win_dump.h dump: move Windows dump structures definitions 2018-10-02 19:09:12 +02:00

         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:

  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.

   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 HACKING and CODING_STYLE files.

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.

  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:

  $ 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:

  $ 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

 - 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

-- End