QEMU With E2K User Support
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Markus Armbruster a9fc37f6bc qapi: Improve qobject input visitor error reporting
Error messages refer to nodes of the QObject being visited by name.
Trouble is the names are sometimes less than helpful:

* The name of the root QObject is whatever @name argument got passed
  to the visitor, except NULL gets mapped to "null".  We commonly pass
  NULL.  Not good.

  Avoiding errors "at the root" mitigates.  For instance,
  visit_start_struct() can only fail when the visited object is not a
  dictionary, and we commonly ensure it is beforehand.

* The name of a QDict's member is the member key.  Good enough only
  when this happens to be unique.

* The name of a QList's member is "null".  Not good.

Improve error messages by referring to nodes by path instead, as
follows:

* The path of the root QObject is whatever @name argument got passed
  to the visitor, except NULL gets mapped to "<anonymous>".

* The path of a root QDict's member is the member key.

* The path of a root QList's member is "[%u]", where %u is the list
  index, starting at zero.

* The path of a non-root QDict's member is the path of the QDict
  concatenated with "." and the member key.

* The path of a non-root QList's member is the path of the QList
  concatenated with "[%u]", where %u is the list index.

For example, the incorrect QMP command

    { "execute": "blockdev-add", "arguments": { "node-name": "foo", "driver": "raw", "file": {"driver": "file" } } }

now fails with

    {"error": {"class": "GenericError", "desc": "Parameter 'file.filename' is missing"}}

instead of

    {"error": {"class": "GenericError", "desc": "Parameter 'filename' is missing"}}

and

    { "execute": "input-send-event", "arguments": { "device": "bar", "events": [ [] ] } }

now fails with

    {"error": {"class": "GenericError", "desc": "Invalid parameter type for 'events[0]', expected: object"}}

instead of

    {"error": {"class": "GenericError", "desc": "Invalid parameter type for 'null', expected: QDict"}}

Aside: calling the thing "parameter" is suboptimal for QMP, because
the root object is "arguments" there.

The qobject output visitor doesn't have this problem because it should
not fail.  Same for dealloc and clone visitors.

The string visitors don't have this problem because they visit just
one value, whose name needs to be passed to the visitor as @name.  The
string output visitor shouldn't fail anyway.

The options visitor uses QemuOpts names.  Their name space is flat, so
the use of QDict member keys as names is fine.  NULL names used with
roots and lists could conceivably result in bad error messages.  Left
for another day.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <1488544368-30622-15-git-send-email-armbru@redhat.com>
2017-03-05 09:14:19 +01:00
audio audio/sdlaudio: Allow audio playback with SDL2 2017-03-01 15:12:03 +01:00
backends Add wctablet device 2017-02-20 11:26:28 +01:00
block iscsi: fix missing unlock 2017-03-03 16:41:20 +01:00
bsd-user
chardev Add wctablet device 2017-02-20 11:26:28 +01:00
contrib
crypto crypto: assert cipher algorithm is always valid 2017-02-27 13:37:14 +00:00
default-configs ACPI: Add Virtual Machine Generation ID support 2017-03-02 07:14:27 +02:00
disas disas/ppc: Fix indefinite articles in comments 2017-01-31 10:10:12 +11:00
docs virtio, pc: fixes, features 2017-03-03 10:09:03 +00:00
dtc@fa8bc7f928 dtc: Revert unintentional submodule downgrade from commit 077dd74239 2017-03-03 12:48:42 +00:00
fpu softfloat: Use correct type in float64_to_uint64_round_to_zero() 2017-02-28 09:03:38 +03:00
fsdev throttle: factor out duplicate code 2017-02-28 10:31:46 +01:00
gdb-xml
hw ppc patch queuye for 2017-03-03 2017-03-04 16:31:14 +00:00
include qapi: Improve qobject input visitor error reporting 2017-03-05 09:14:19 +01:00
io io: fully parse & validate HTTP headers for websocket protocol handshake 2017-02-28 11:51:16 +00:00
libdecnumber
linux-headers update Linux headers to 4.11 2017-02-28 16:18:49 +00:00
linux-user target-arm queue: 2017-02-28 14:50:17 +00:00
migration Migration pull 2017-03-02 17:39:12 +00:00
nbd nbd/server: Use real permissions for NBD exports 2017-02-28 20:47:50 +01:00
net vhost-user: delay vhost_user_stop 2017-02-28 19:11:15 +00:00
pc-bios pseries: Update SLOF firmware image 2017-03-03 17:25:32 +11:00
pixman@87eea99e44
po
qapi qapi: Improve qobject input visitor error reporting 2017-03-05 09:14:19 +01:00
qga qapi: Support multiple command registries per program 2017-03-05 09:12:25 +01:00
qobject option cutils: Fix and clean up number conversions 2017-02-24 18:34:27 +00:00
qom Merge branch 'icount-update' into HEAD 2017-03-03 16:39:18 +01:00
replay replay: add record/replay for audio passthrough 2017-03-01 15:11:44 +01:00
roms pseries: Update SLOF firmware image 2017-03-03 17:25:32 +11:00
scripts qapi-introspect: Mangle --prefix argument properly for C 2017-03-05 09:12:29 +01:00
slirp slirp: tcp_listen(): Don't try to close() an fd we never opened 2017-02-26 15:39:29 +01:00
stubs virtio, pc: fixes, features 2017-03-03 10:09:03 +00:00
target ppc patch queuye for 2017-03-03 2017-03-04 16:31:14 +00:00
tcg Merge branch 'icount-update' into HEAD 2017-03-03 16:39:18 +01:00
tests qapi: Improve a QObject input visitor error message 2017-03-05 09:14:19 +01:00
trace trace: switch to modular code generation for sub-directories 2017-01-31 17:11:18 +00:00
ui vnc: fix double free issues 2017-02-27 16:22:01 +01:00
util ppc patch queuye for 2017-03-03 2017-03-04 16:31:14 +00:00
.dir-locals.el
.exrc
.gitignore Makefile: Put VERSION info into version.texi rather than using -D 2017-02-20 14:11:07 +01:00
.gitmodules
.mailmap
.shippable.yml .shippable: add s390x-cross target 2017-02-28 20:31:01 +08:00
.travis.yml .travis.yml: split VM based builds 2017-02-10 13:19:56 +00:00
accel.c
arch_init.c
atomic_template.h
balloon.c trace: switch to modular code generation for sub-directories 2017-01-31 17:11:18 +00:00
block.c block: Add Error parameter to bdrv_append() 2017-02-28 20:47:51 +01:00
blockdev-nbd.c trace: switch to modular code generation for sub-directories 2017-01-31 17:11:18 +00:00
blockdev.c block: Add Error parameter to bdrv_append() 2017-02-28 20:47:51 +01:00
blockjob.c blockjob: Factor out block_job_remove_all_bdrv() 2017-02-28 20:40:37 +01:00
bootdevice.c
bt-host.c
bt-vhci.c
Changelog
CODING_STYLE CODING_STYLE: Mention preferred comment form 2017-02-28 09:03:38 +03:00
configure target/alpha: Enable MTTCG by default 2017-02-28 11:41:46 +11:00
COPYING
COPYING.LIB
cpu-exec-common.c tcg: remove global exit_request 2017-02-24 10:32:45 +00:00
cpu-exec.c Merge branch 'icount-update' into HEAD 2017-03-03 16:39:18 +01:00
cpus-common.c
cpus.c KVM: move SIG_IPI handling to kvm-all.c 2017-03-03 16:40:02 +01:00
cputlb.c cputlb: Don't assume do_unassigned_access() never returns 2017-02-28 12:08:15 +00:00
device_tree.c
device-hotplug.c
disas.c Fix Thumb-1 BE32 execution and disassembly. 2017-02-07 18:29:59 +00:00
dma-helpers.c block: explicitly acquire aiocontext in bottom halves that need it 2017-02-21 11:39:39 +00:00
dump.c
exec.c exec, kvm, target-ppc: Move getrampagesize() to common code 2017-03-03 11:30:59 +11:00
gdbstub.c gdbstub: Fix vCont behaviour 2017-02-16 14:06:56 +01:00
HACKING
hax-stub.c
hmp-commands-info.hx qmp/hmp: add query-vm-generation-id and 'info vm-generation-id' commands 2017-03-02 07:14:27 +02:00
hmp-commands.hx
hmp.c virtio, pc: fixes, features 2017-03-03 10:09:03 +00:00
hmp.h qmp/hmp: add query-vm-generation-id and 'info vm-generation-id' commands 2017-03-02 07:14:27 +02:00
ioport.c trace: switch to modular code generation for sub-directories 2017-01-31 17:11:18 +00:00
iothread.c monitor: add poll-* properties into query-iothreads result 2017-02-21 18:29:01 +00:00
kvm-all.c KVM: use KVM_CAP_IMMEDIATE_EXIT 2017-03-03 16:40:02 +01:00
kvm-stub.c KVM: move SIG_IPI handling to kvm-all.c 2017-03-03 16:40:02 +01:00
LICENSE
MAINTAINERS qmp-test: New, covering basic QMP protocol 2017-03-05 09:02:10 +01:00
Makefile Makefile: Put VERSION info into version.texi rather than using -D 2017-02-20 14:11:07 +01:00
Makefile.objs block: move AioContext, QEMUTimer, main-loop to libqemuutil 2017-02-21 11:14:07 +00:00
Makefile.target -----BEGIN PGP SIGNATURE----- 2017-02-02 16:08:28 +00:00
memory_ldst.inc.c
memory_mapping.c
memory.c memory: show region offset and ROM/RAM type in "info mtree -f" 2017-03-03 16:40:03 +01:00
module-common.c
monitor.c qmp: Drop duplicated QMP command object checks 2017-03-05 09:14:19 +01:00
numa.c numa: Flatten simple union NumaOptions 2017-02-22 19:50:46 +01:00
os-posix.c
os-win32.c
page_cache.c
qapi-schema.json qapi: flatten GuestPanicInformation union 2017-03-03 16:40:03 +01:00
qdev-monitor.c migrate: Introduce a 'dc->vmsd' check to avoid segfault for --only-migratable 2017-02-28 11:30:22 +00:00
qdict-test-data.txt
qemu-bridge-helper.c
qemu-doc.texi
qemu-ga.texi
qemu-img-cmds.hx qemu-img: make convert async 2017-02-28 20:40:31 +01:00
qemu-img.c commit: Add filter-node-name to block-commit 2017-02-28 20:47:50 +01:00
qemu-img.texi qemu-img: make convert async 2017-02-28 20:40:31 +01:00
qemu-io-cmds.c hmp: Request permissions in qemu-io 2017-02-28 20:47:50 +01:00
qemu-io.c qemu-io: Return non-zero exit code on failure 2017-02-12 00:47:42 +01:00
qemu-nbd.c qemu-nbd: Implement socket activation. 2017-02-16 15:30:45 +01:00
qemu-nbd.texi
qemu-option-trace.texi docs: update manpage for stderr->log rename 2017-02-13 13:38:31 +00:00
qemu-options-wrapper.h
qemu-options.h
qemu-options.hx qemu-options: Rewrite -numa documentation 2017-03-03 10:08:03 -03:00
qemu-seccomp.c
qemu-tech.texi
qemu.nsi
qemu.sasl
qmp.c char: headers clean-up 2017-01-31 23:31:22 +04:00
qtest.c qtest: fix a memory leak 2017-03-01 00:09:28 +04:00
README
replication.c
replication.h
rules.mak rules: don't try to create missing include dirs 2017-02-07 11:52:34 +00:00
softmmu_template.h
spice-qemu-char.c spice-char: fix segfault in char_spice_finalize 2017-03-03 16:40:03 +01:00
tcg-runtime.c
tci.c
thunk.c
tpm.c
trace-events qmp: Drop duplicated QMP command object checks 2017-03-05 09:14:19 +01:00
translate-all.c Merge branch 'icount-update' into HEAD 2017-03-03 16:39:18 +01:00
translate-all.h
translate-common.c Merge branch 'icount-update' into HEAD 2017-03-03 16:39:18 +01:00
user-exec-stub.c
user-exec.c
VERSION
version.rc
vl.c qmp: Dumb down how we run QMP command registration 2017-03-05 09:02:10 +01:00
xen-common-stub.c
xen-common.c
xen-hvm-stub.c
xen-hvm.c trace: switch to modular code generation for sub-directories 2017-01-31 17:11:18 +00:00
xen-mapcache.c trace: switch to modular code generation for sub-directories 2017-01-31 17:11:18 +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:

  mkdir build
  cd build
  ../configure
  make

Additional information can also be found online via the QEMU website:

  http://qemu-project.org/Hosts/Linux
  http://qemu-project.org/Hosts/Mac
  http://qemu-project.org/Hosts/W32


Submitting patches
==================

The QEMU source code is maintained under the GIT version control system.

   git clone git://git.qemu-project.org/qemu.git

When submitting patches, the preferred 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

  http://qemu-project.org/Contribute/SubmitAPatch
  http://qemu-project.org/Contribute/TrivialPatches


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:

  http://qemu-project.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
   http://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:

  http://qemu-project.org/Contribute/StartHere

-- End