Commit Graph

24 Commits

Author SHA1 Message Date
Markus Armbruster d2623129a7 qom: Drop parameter @errp of object_property_add() & friends
The only way object_property_add() can fail is when a property with
the same name already exists.  Since our property names are all
hardcoded, failure is a programming error, and the appropriate way to
handle it is passing &error_abort.

Same for its variants, except for object_property_add_child(), which
additionally fails when the child already has a parent.  Parentage is
also under program control, so this is a programming error, too.

We have a bit over 500 callers.  Almost half of them pass
&error_abort, slightly fewer ignore errors, one test case handles
errors, and the remaining few callers pass them to their own callers.

The previous few commits demonstrated once again that ignoring
programming errors is a bad idea.

Of the few ones that pass on errors, several violate the Error API.
The Error ** argument must be NULL, &error_abort, &error_fatal, or a
pointer to a variable containing NULL.  Passing an argument of the
latter kind twice without clearing it in between is wrong: if the
first call sets an error, it no longer points to NULL for the second
call.  ich9_pm_add_properties(), sparc32_ledma_realize(),
sparc32_dma_realize(), xilinx_axidma_realize(), xilinx_enet_realize()
are wrong that way.

When the one appropriate choice of argument is &error_abort, letting
users pick the argument is a bad idea.

Drop parameter @errp and assert the preconditions instead.

There's one exception to "duplicate property name is a programming
error": the way object_property_add() implements the magic (and
undocumented) "automatic arrayification".  Don't drop @errp there.
Instead, rename object_property_add() to object_property_try_add(),
and add the obvious wrapper object_property_add().

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20200505152926.18877-15-armbru@redhat.com>
[Two semantic rebase conflicts resolved]
2020-05-15 07:07:58 +02:00
Philippe Mathieu-Daudé 112c37a6a6 ui/input-linux: Do not ignore ioctl() return value
Fix warnings reported by Clang static code analyzer:

    CC      ui/input-linux.o
      ui/input-linux.c:343:9: warning: Value stored to 'rc' is never read
          rc = ioctl(il->fd, EVIOCGBIT(EV_REL, sizeof(relmap)), &relmap);
          ^    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      ui/input-linux.c:351:9: warning: Value stored to 'rc' is never read
          rc = ioctl(il->fd, EVIOCGBIT(EV_ABS, sizeof(absmap)), &absmap);
          ^    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      ui/input-linux.c:354:13: warning: Value stored to 'rc' is never read
              rc = ioctl(il->fd, EVIOCGABS(ABS_X), &absinfo);
              ^    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      ui/input-linux.c:357:13: warning: Value stored to 'rc' is never read
              rc = ioctl(il->fd, EVIOCGABS(ABS_Y), &absinfo);
              ^    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      ui/input-linux.c:365:9: warning: Value stored to 'rc' is never read
          rc = ioctl(il->fd, EVIOCGBIT(EV_KEY, sizeof(keymap)), keymap);
          ^    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      ui/input-linux.c:366:9: warning: Value stored to 'rc' is never read
          rc = ioctl(il->fd, EVIOCGKEY(sizeof(keystate)), keystate);
          ^    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Reported-by: Clang Static Analyzer
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Darren Kenny <darren.kenny@oracle.com>
Message-id: 20200322161219.17757-1-philmd@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2020-03-25 09:55:03 +01:00
Niklas Haas a923b471fc input-linux: add shift+shift as a grab toggle
We have ctrl-ctrl and alt-alt; why not shift-shift? That's my preferred
grab binding, personally.

Signed-off-by: Niklas Haas <git@haasn.xyz>
Message-id: 20190818105038.19520-1-qemu@haasn.xyz
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2019-08-21 12:25:46 +02:00
Markus Armbruster d5938f29fe Clean up inclusion of sysemu/sysemu.h
In my "build everything" tree, changing sysemu/sysemu.h triggers a
recompile of some 5400 out of 6600 objects (not counting tests and
objects that don't depend on qemu/osdep.h).

Almost a third of its inclusions are actually superfluous.  Delete
them.  Downgrade two more to qapi/qapi-types-run-state.h, and move one
from char/serial.h to char/serial.c.

hw/semihosting/config.c, monitor/monitor.c, qdev-monitor.c, and
stubs/semihost.c define variables declared in sysemu/sysemu.h without
including it.  The compiler is cool with that, but include it anyway.

This doesn't reduce actual use much, as it's still included into
widely included headers.  The next commit will tackle that.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20190812052359.30071-27-armbru@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
2019-08-16 13:31:53 +02:00
Markus Armbruster db72581598 Include qemu/main-loop.h less
In my "build everything" tree, changing qemu/main-loop.h triggers a
recompile of some 5600 out of 6600 objects (not counting tests and
objects that don't depend on qemu/osdep.h).  It includes block/aio.h,
which in turn includes qemu/event_notifier.h, qemu/notify.h,
qemu/processor.h, qemu/qsp.h, qemu/queue.h, qemu/thread-posix.h,
qemu/thread.h, qemu/timer.h, and a few more.

Include qemu/main-loop.h only where it's needed.  Touching it now
recompiles only some 1700 objects.  For block/aio.h and
qemu/event_notifier.h, these numbers drop from 5600 to 2800.  For the
others, they shrink only slightly.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20190812052359.30071-21-armbru@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2019-08-16 13:31:52 +02:00
Markus Armbruster 0b8fa32f55 Include qemu/module.h where needed, drop it from qemu-common.h
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20190523143508.25387-4-armbru@redhat.com>
[Rebased with conflicts resolved automatically, except for
hw/usb/dev-hub.c hw/misc/exynos4210_rng.c hw/misc/bcm2835_rng.c
hw/misc/aspeed_scu.c hw/display/virtio-vga.c hw/arm/stm32f205_soc.c;
ui/cocoa.m fixed up]
2019-06-12 13:18:33 +02:00
Ryan El Kochta 2657846fb2 input-linux: customizable grab toggle keys
This patch adds a new option to the input-linux object:

grab-toggle=[key-combo]

The key combination can be one of the following:

* ctrl-ctrl
* alt-alt
* meta-meta
* scrolllock
* ctrl-scrolllock

The user can pick any of these key combinations. The VM's grab
of the evdev device will be toggled when the key combination is
pressed.

Any invalid setting will result in an error. No setting will
result in the current default of ctrl-ctrl.

The right and left ctrl key both work for Ctrl-Scrolllock.

If scrolllock is selected as one of the grab-toggle keys, it
will be entirely disabled and not passed to the guest at all.
This is to prevent enabling it while attempting to leave or enter
the VM. On the host, scrolllock can be disabled using xmodmap.

First, find the modifier that Scroll_Lock is bound to:

$ xmodmap -pm

Then, remove Scroll_Lock from it, replacing modX with the modifier:

$ xmodmap -e 'remove modX = Scroll_Lock'

If Scroll_Lock is not bound to any modifier, it is already disabled.

To save the changes, add them to your xinitrc.

Ryan El Kochta (1):
  input-linux: customizable grab toggle keys v5

Signed-off-by: Ryan El Kochta <relkochta@gmail.com>
Message-id: 20190123214555.12712-2-relkochta@gmail.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2019-01-24 10:42:38 +01:00
Gerd Hoffmann 606eb0c649 ui: move qemu_input_linux_to_qcode()
Move from input-linux.c to input-keymap.c and export it,
so the function is available elsewhere too.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 20170726152918.11995-3-kraxel@redhat.com
2017-07-27 14:23:09 +02:00
Philippe Voinov d755defd5d ui: input-linux: Add absolute event support
This patch adds support for absolute pointer events to the input-linux
subsystem. This support was omitted from the original input-linux patch,
however most of the code required for it is already in place.

Support for absolute events is especially useful for guests with vga
passthrough. Since they have a physical monitor, none of normal channels
for sending video output (vnc, etc) are used, meaning they also can't be
used to send absolute input events. This leaves QMP as the only option
to send absolute input into vga passthrough guests, which is not its
intended use and is not efficient.

This patch allows, for example, uinput to be used to create virtual
absolute input devices. This lets you build external systems which share
physical input devices between guests. Without absolute input
capability, such external systems can't seamlessly share pointer devices
between guests.

Signed-off-by: Philippe Voinov <philippevoinov@gmail.com>
Message-id: 20170505134231.30210-1-philippevoinov@gmail.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2017-05-11 09:42:16 +02:00
Javier Celaya 1684907c92 Fix input-linux reading from device
The evdev devices in input-linux.c are read in blocks of one whole
event. If there are not enough bytes available, they are discarded,
instead of being kept for the next read operation. This results in
lost events, of even non-working devices.

This patch keeps track of the number of bytes to be read to fill up
a whole event, and then handle it.

Changes from v1 to v2:
- Fix: Calculate offset on each iteration

Changes from v2 to v3:
- Fix coding style
- Store offset instead of bytes to be read

Signed-off-by: Javier Celaya <jcelaya@gmail.com>
Message-id: 20170327182624.2914-1-jcelaya@gmail.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2017-04-03 11:44:58 +02:00
Fabian Lesniak 1266b68c6e ui: add support for mice with extra/side buttons
Adds input event generation for BTN_SIDE and BTN_EXTRA events to gtk and
input-linux methods.

Signed-off-by: Fabian Lesniak <fabian@lesniak-it.de>
Message-id: 20161206190007.7539-4-fabian@lesniak-it.de
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2017-01-31 08:14:51 +01:00
Gerd Hoffmann 2a57c55f26 input-linux: initialize key state
Query input device keys, initialize state accordingly, so the correct
state is reflected in case any key is pressed at initialization time.
There is a high chance for this to actually happen for the 'enter' key
in case you start qemu with a terminal command (directly or virsh).

When finding any pressed keys the input grab is delayed until all keys
are lifted, to avoid confusing guest and host with appearently stuck
keys.

Reported-by: Muted Bytes <mutedbytes@gmail.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 1476277384-30365-1-git-send-email-kraxel@redhat.com
2016-10-13 09:25:24 +02:00
Gerd Hoffmann 2e6a64cb8d input-linux: better capability checks, merge input_linux_event_{mouse, keyboard}
Improve capability checks (count keys and buttons), store results.

Merge the input_linux_event_mouse and input_linux_event_keyboard
functions into one, dispatch into input_linux_handle_mouse and
input_linux_handle_keyboard depending on device capabilities.

Allow calling both handle functions, so we can handle mice which
also send key events, by routing those key events to the keyboard.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 1466067800-25434-4-git-send-email-kraxel@redhat.com
2016-07-12 09:25:50 +02:00
Gerd Hoffmann 2330e9e7cc input-linux: factor out input_linux_handle_keyboard
No functional change.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 1466067800-25434-3-git-send-email-kraxel@redhat.com
2016-07-12 09:25:50 +02:00
Gerd Hoffmann d4df42c431 input-linux: factor out input_linux_handle_mouse
No functional change.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 1466067800-25434-2-git-send-email-kraxel@redhat.com
2016-07-12 09:25:50 +02:00
Gerd Hoffmann ce47d3d427 input-linux: refine mouse detection
Read absolute and relative axis information, only classify
devices as mouse/tablet in case the x axis is present.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2016-04-13 15:52:28 +02:00
Peter Maydell 84a5a80148 * Log filtering from Alex and Peter
* Chardev fix from Marc-André
 * config.status tweak from David
 * Header file tweaks from Markus, myself and Veronia (Outreachy candidate)
 * get_ticks_per_sec() removal from Rutuja (Outreachy candidate)
 * Coverity fix from myself
 * PKE implementation from myself, based on rth's XSAVE support
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Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into staging

* Log filtering from Alex and Peter
* Chardev fix from Marc-André
* config.status tweak from David
* Header file tweaks from Markus, myself and Veronia (Outreachy candidate)
* get_ticks_per_sec() removal from Rutuja (Outreachy candidate)
* Coverity fix from myself
* PKE implementation from myself, based on rth's XSAVE support

# gpg: Signature made Thu 24 Mar 2016 20:15:11 GMT using RSA key ID 78C7AE83
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>"
# gpg:                 aka "Paolo Bonzini <pbonzini@redhat.com>"

* remotes/bonzini/tags/for-upstream: (28 commits)
  target-i386: implement PKE for TCG
  config.status: Pass extra parameters
  char: translate from QIOChannel error to errno
  exec: fix error handling in file_ram_alloc
  cputlb: modernise the debug support
  qemu-log: support simple pid substitution for logs
  target-arm: dfilter support for in_asm
  qemu-log: dfilter-ise exec, out_asm, op and opt_op
  qemu-log: new option -dfilter to limit output
  qemu-log: Improve the "exec" TB execution logging
  qemu-log: Avoid function call for disabled qemu_log_mask logging
  qemu-log: correct help text for -d cpu
  tcg: pass down TranslationBlock to tcg_code_gen
  util: move declarations out of qemu-common.h
  Replaced get_tick_per_sec() by NANOSECONDS_PER_SECOND
  hw: explicitly include qemu-common.h and cpu.h
  include/crypto: Include qapi-types.h or qemu/bswap.h instead of qemu-common.h
  isa: Move DMA_transfer_handler from qemu-common.h to hw/isa/isa.h
  Move ParallelIOArg from qemu-common.h to sysemu/char.h
  Move QEMU_ALIGN_*() from qemu-common.h to qemu/osdep.h
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

Conflicts:
	scripts/clean-includes
2016-03-24 21:42:40 +00:00
Gerd Hoffmann 81b00c968a input-linux: fix Coverity warning
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 1458129049-12484-1-git-send-email-kraxel@redhat.com
2016-03-24 07:58:20 +01:00
Gerd Hoffmann 0e066b2cc5 input-linux: switch over to -object
This patches makes input-linux use -object instead of a new command line
switch.  So, instead of the switch ...

    -input-linux /dev/input/event$nr

... you must create an object this way:

    -object input-linux,id=$name,evdev=/dev/input/event$nr

Bonus is that you can hot-add and hot-remove them via monitor now.

Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 1457681901-30916-1-git-send-email-kraxel@redhat.com
2016-03-24 07:58:20 +01:00
Markus Armbruster da34e65cb4 include/qemu/osdep.h: Don't include qapi/error.h
Commit 57cb38b included qapi/error.h into qemu/osdep.h to get the
Error typedef.  Since then, we've moved to include qemu/osdep.h
everywhere.  Its file comment explains: "To avoid getting into
possible circular include dependencies, this file should not include
any other QEMU headers, with the exceptions of config-host.h,
compiler.h, os-posix.h and os-win32.h, all of which are doing a
similar job to this file and are under similar constraints."
qapi/error.h doesn't do a similar job, and it doesn't adhere to
similar constraints: it includes qapi-types.h.  That's in excess of
100KiB of crap most .c files don't actually need.

Add the typedef to qemu/typedefs.h, and include that instead of
qapi/error.h.  Include qapi/error.h in .c files that need it and don't
get it now.  Include qapi-types.h in qom/object.h for uint16List.

Update scripts/clean-includes accordingly.  Update it further to match
reality: replace config.h by config-target.h, add sysemu/os-posix.h,
sysemu/os-win32.h.  Update the list of includes in the qemu/osdep.h
comment quoted above similarly.

This reduces the number of objects depending on qapi/error.h from "all
of them" to less than a third.  Unfortunately, the number depending on
qapi-types.h shrinks only a little.  More work is needed for that one.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
[Fix compilation without the spice devel packages. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-03-22 22:20:15 +01:00
Eduardo Habkost 34294e2f54 module: Rename machine_init() to opts_init()
The only remaining users of machine_init() only call
qemu_add_opts(). Rename machine_init() to opts_init() and move it
closer to the qemu_add_opts() calls on vl.c.

Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Igor Mammedov <imammedo@redhat.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Marcel Apfelbaum <marcel@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2016-03-16 15:54:23 -03:00
Gerd Hoffmann a6ccabd676 input-linux: add switch to enable auto-repeat events
Enable with "-input-linux /dev/input/${device},repeat=on".

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 1457087116-4379-4-git-send-email-kraxel@redhat.com
2016-03-08 12:20:11 +01:00
Gerd Hoffmann 46d921bebe input-linux: add option to toggle grab on all devices
Maintain a list of all input devices.  Add an option to make grab
work across all devices (so toggling grab on the keybard can switch
over the mouse too).

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 1457087116-4379-3-git-send-email-kraxel@redhat.com
2016-03-08 12:20:11 +01:00
Gerd Hoffmann e0d2bd5195 input: linux evdev support
This patch adds support for reading input events directly from linux
evdev devices and forward them to the guest.  Unlike virtio-input-host
which simply passes on all events to the guest without looking at them
this will interpret the events and feed them into the qemu input
subsystem.

Therefore this is limited to what the qemu input subsystem and the
emulated input devices are able to handle.  Also there is no support for
absolute coordinates (tablet/touchscreen).  So we are talking here about
basic mouse and keyboard support.

The advantage is that it'll work without virtio-input drivers in the
guest, the events are delivered to the usual ps/2 or usb input devices
(depending on what the machine happens to have).  And for keyboards
qemu is able to switch the keyboard between guest and host on hotkey.
The hotkey is hard-coded for now (both control keys), initialy the
guest owns the keyboard.

Probably most useful when assigning vga devices with vfio and using a
physical monitor instead of vnc/spice/gtk as guest display.

Usage:  Add '-input-linux /dev/input/event<nr>' to the qemu command
line.  Note that udev has rules which populate /dev/input/by-{id,path}
with static names, which might be more convinient to use.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 1457087116-4379-2-git-send-email-kraxel@redhat.com
2016-03-08 12:20:11 +01:00