QEMU With E2K User Support
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Peter Xu 474514668b monitor: add lock to protect mon_fdsets
Introduce a new global big lock for mon_fdsets.  Take it where needed.

The monitor_fdset_get_fd() handling is a bit tricky: now we need to call
qemu_mutex_unlock() which might pollute errno, so we need to make sure
the correct errno be passed up to the callers.  To make things simpler,
we let monitor_fdset_get_fd() return the -errno directly when error
happens, then in qemu_open() we move it back into errno.

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <20180608035511.7439-8-peterx@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2018-06-18 15:48:22 +02:00
accel exec.c: Handle IOMMUs in address_space_translate_for_iotlb() 2018-06-15 15:23:34 +01:00
audio
backends
block block: Remove deprecated -drive option serial 2018-06-15 14:49:44 +02:00
bsd-user
capstone@22ead3e0bf
chardev
contrib
crypto
default-configs
disas
docs bswap: Add new stn_*_p() and ldn_*_p() memory access functions 2018-06-15 15:23:34 +01:00
dtc@e54388015a
fpu
fsdev
gdb-xml
hw Block layer patches: 2018-06-15 16:30:27 +01:00
include Migration pull 2018-06-15 2018-06-15 18:13:35 +01:00
io
libdecnumber
linux-headers
linux-user linux-user/sparc64: Add inotify_rm_watch and tee syscalls 2018-06-11 14:47:45 +02:00
migration migration: calculate expected_downtime with ram_bytes_remaining() 2018-06-15 14:40:56 +01:00
nbd
net vhost-user: delete net client if necessary 2018-06-15 10:39:53 +08:00
pc-bios
po
qapi Migration pull 2018-06-15 2018-06-15 18:13:35 +01:00
qga
qobject block: Fix -blockdev / blockdev-add for empty objects and arrays 2018-06-15 14:49:44 +02:00
qom Purge uses of banned g_assert_FOO() 2018-06-13 13:47:35 +02:00
replay
roms
scripts Miscellaneous patches for 2018-06-13 2018-06-14 11:35:22 +01:00
scsi
slirp
stubs monitor: add lock to protect mon_fdsets 2018-06-18 15:48:22 +02:00
target xilinx-next-2018-06-15.for-upstream 2018-06-15 17:28:37 +01:00
tcg
tests block: Remove deprecated -drive option serial 2018-06-15 14:49:44 +02:00
trace
ui sdl2: restore window dimensions by resize 2018-06-14 09:55:09 +02:00
util monitor: add lock to protect mon_fdsets 2018-06-18 15:48:22 +02:00
.dir-locals.el
.editorconfig
.exrc
.gdbinit
.gitignore block: Ignore generated job QAPI files 2018-06-13 10:51:49 -04:00
.gitmodules
.gitpublish
.mailmap
.shippable.yml
.travis.yml travis: reduce time taken for trace-backend testing 2018-06-14 20:24:07 +01:00
arch_init.c
balloon.c
block.c block: Add block-specific QDict header 2018-06-15 14:49:44 +02:00
blockdev-nbd.c
blockdev.c block: Remove dead deprecation warning code 2018-06-15 14:49:44 +02:00
blockjob.c
bootdevice.c
bt-host.c
bt-vhci.c
Changelog
CODING_STYLE CODING_STYLE: Define our preferred form for multiline comments 2018-06-15 15:23:34 +01:00
configure configure: Require Python 2.7 or newer 2018-06-08 16:40:49 -03:00
COPYING
COPYING.LIB
COPYING.PYTHON
cpus-common.c
cpus.c
device_tree.c
device-hotplug.c block: Remove deprecated -drive option addr 2018-06-15 14:49:44 +02:00
disas.c
dma-helpers.c
dump.c
exec.c exec.c: Handle IOMMUs in address_space_translate_for_iotlb() 2018-06-15 15:23:34 +01:00
gdbstub.c
HACKING
hmp-commands-info.hx
hmp-commands.hx block: Remove deprecated -drive geometry options 2018-06-15 14:49:44 +02:00
hmp.c migration/postcopy: Add max-postcopy-bandwidth parameter 2018-06-15 14:40:56 +01:00
hmp.h
ioport.c
iothread.c
job-qmp.c
job.c
LICENSE
MAINTAINERS qobject: Move block-specific qdict code to block-qdict.c 2018-06-15 14:49:44 +02:00
Makefile ui: bugfixes for sdl and gtk 2018-06-14 14:04:14 +01:00
Makefile.objs
Makefile.target
memory_ldst.inc.c
memory_mapping.c
memory.c iommu: Add IOMMU index argument to translate method 2018-06-15 15:23:34 +01:00
module-common.c
monitor.c monitor: add lock to protect mon_fdsets 2018-06-18 15:48:22 +02:00
numa.c
os-posix.c
os-win32.c
qdev-monitor.c
qdict-test-data.txt
qemu-bridge-helper.c
qemu-doc.texi block: Remove deprecated -drive option serial 2018-06-15 14:49:44 +02:00
qemu-ga.texi
qemu-img-cmds.hx qemu-img: Remove deprecated -s snapshot_id_or_name option 2018-06-11 16:18:45 +02:00
qemu-img.c qemu-img: Fix assert when mapping unaligned raw file 2018-06-15 14:49:44 +02:00
qemu-img.texi qemu-img: Remove deprecated -s snapshot_id_or_name option 2018-06-11 16:18:45 +02:00
qemu-io-cmds.c qemu-io: Let command functions return error code 2018-06-11 16:18:45 +02:00
qemu-io.c qemu-io: Exit with error when a command failed 2018-06-11 16:18:45 +02:00
qemu-keymap.c
qemu-nbd.c
qemu-nbd.texi
qemu-option-trace.texi
qemu-options-wrapper.h
qemu-options.h
qemu-options.hx block: Remove deprecated -drive option serial 2018-06-15 14:49:44 +02:00
qemu-seccomp.c
qemu-tech.texi
qemu.nsi
qemu.sasl
qmp.c
qtest.c
README
replication.c
replication.h
rules.mak
thunk.c
tpm.c
trace-events
VERSION
version.rc
vl.c monitor: move init global earlier 2018-06-18 15:48:22 +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 git://git.qemu.org/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 git://git.qemu.org/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