riscv/qemu: QEMU main repository: Please see https://www.qemu.org/docs/master/devel/submitting-a-patch.html for how to submit changes to QEMU. Pull Requests are ignored. Please only use release tarballs from the QEMU website. http://www.qemu.org - qemu

QEMU main repository: Please see https://www.qemu.org/docs/master/devel/submitting-a-patch.html for how to submit changes to QEMU. Pull Requests are ignored. Please only use release tarballs from the QEMU website. http://www.qemu.org

emulation kvm qemu virtualization

History

Phil Dennis-Jordan f5ab12caba ui & main loop: Redesign of system-specific main thread event handling macOS's Cocoa event handling must be done on the initial (main) thread of the process. Furthermore, if library or application code uses libdispatch, the main dispatch queue must be handling events on the main thread as well. So far, this has affected Qemu in both the Cocoa and SDL UIs, although in different ways: the Cocoa UI replaces the default qemu_main function with one that spins Qemu's internal main event loop off onto a background thread. SDL (which uses Cocoa internally) on the other hand uses a polling approach within Qemu's main event loop. Events are polled during the SDL UI's dpy_refresh callback, which happens to run on the main thread by default. As UIs are mutually exclusive, this works OK as long as nothing else needs platform-native event handling. In the next patch, a new device is introduced based on the ParavirtualizedGraphics.framework in macOS. This uses libdispatch internally, and only works when events are being handled on the main runloop. With the current system, it works when using either the Cocoa or the SDL UI. However, it does not when running headless. Moreover, any attempt to install a similar scheme to the Cocoa UI's main thread replacement fails when combined with the SDL UI. This change tidies up main thread management to be more flexible. * The qemu_main global function pointer is a custom function for the main thread, and it may now be NULL. When it is, the main thread runs the main Qemu loop. This represents the traditional setup. * When non-null, spawning the main Qemu event loop on a separate thread is now done centrally rather than inside the Cocoa UI code. * For most platforms, qemu_main is indeed NULL by default, but on Darwin, it defaults to a function that runs the CFRunLoop. * The Cocoa UI sets qemu_main to a function which runs the NSApplication event handling runloop, as is usual for a Cocoa app. * The SDL UI overrides the qemu_main function to NULL, thus specifying that Qemu's main loop must run on the main thread. * The GTK UI also overrides the qemu_main function to NULL. * For other UIs, or in the absence of UIs, the platform's default behaviour is followed. This means that on macOS, the platform's runloop events are always handled, regardless of chosen UI. The new PV graphics device will thus work in all configurations. There is no functional change on other operating systems. Implementing this via a global function pointer variable is a bit ugly, but it's probably worth investigating the existing UI thread rule violations in the SDL (e.g. #2537) and GTK+ back-ends. Fixing those issues might precipitate requirements similar but not identical to those of the Cocoa UI; hopefully we'll see some kind of pattern emerge, which can then be used as a basis for an overhaul. (In fact, it may turn out to be simplest to split the UI/native platform event thread from the QEMU main event loop on all platforms, with any UI or even none at all.) Signed-off-by: Phil Dennis-Jordan <phil@philjordan.eu> Reviewed-by: Akihiko Odaki <akihiko.odaki@daynix.com> Tested-by: Akihiko Odaki <akihiko.odaki@daynix.com> Message-ID: <20241223221645.29911-2-phil@philjordan.eu> [PMD: Declare 'qemu_main' symbol in tests/qtest/fuzz/fuzz.c, add missing g_assert_not_reached() call in main()] Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>		2 years ago
..
icons	configure: move directory options from config-host.mak to meson	6 years ago
shader	meson: do not build shaders by default	3 years ago
clipboard.c	ui/vdagent: notify clipboard peers of serial reset	2 years ago
cocoa.m	ui & main loop: Redesign of system-specific main thread event handling	2 years ago
console-gl.c	ui/console: remove redundant format field	3 years ago
console-priv.h	ui/curses: Do not use console_select()	2 years ago
console-vc-stubs.c	ui/curses: Do not use console_select()	2 years ago
console-vc.c	ui: Replace type_register() with type_register_static()	2 years ago
console.c	ui: refactor using a common qemu_pixman_shareable	2 years ago
curses.c	include: Rename sysemu/ -> system/	2 years ago
curses_keys.h	For curses display, recognize a few more control keys	3 years ago
cursor.c	ui/cursor: remove cursor_get_mono_image	2 years ago
cursor_hidden.xpm	ui: move files to ui/ and include/ui/	14 years ago
cursor_left_ptr.xpm	ui: move files to ui/ and include/ui/	14 years ago
dbus-chardev.c	ui/dbus: win32 support	3 years ago
dbus-clipboard.c	include: Rename sysemu/ -> system/	2 years ago
dbus-console.c	ui/dbus: do not limit to one listener per connection / bus name	2 years ago
dbus-display1.xml	ui/dbus: add Listener.Unix.Map interface XML	2 years ago
dbus-error.c	ui: add a D-Bus display backend	5 years ago
dbus-listener.c	include: Rename sysemu/ -> system/	2 years ago
dbus-module.c	ui/dbus: add p2p=on/off option	5 years ago
dbus.c	include: Rename sysemu/ -> system/	2 years ago
dbus.h	ui/dbus: win32 support	3 years ago
dmabuf.c	ui/console: move QemuDmaBuf struct def to dmabuf.c	2 years ago
egl-context.c	qapi/ui: Drop temporary 'prefix'	2 years ago
egl-headless.c	qapi/ui: Drop temporary 'prefix'	2 years ago
egl-helpers.c	include: Rename sysemu/ -> system/	2 years ago
gtk-clipboard.c	Remove qemu-common.h include from most units	4 years ago
gtk-egl.c	include: Rename sysemu/ -> system/	2 years ago
gtk-gl-area.c	include: Rename sysemu/ -> system/	2 years ago
gtk.c	ui & main loop: Redesign of system-specific main thread event handling	2 years ago
input-barrier.c	include: Rename sysemu/ -> system/	2 years ago
input-barrier.h	ui: add an embedded Barrier client	7 years ago
input-keymap.c	meson: rename included C source files to .c.inc	6 years ago
input-legacy.c	ui/input-legacy.c: remove unused legacy qemu_add_kbd_event_handler() function	2 years ago
input-linux.c	include: Rename sysemu/ -> system/	2 years ago
input.c	include: Rename sysemu/ -> system/	2 years ago
kbd-state.c	ui/vnc: Do not use console_select()	2 years ago
keymaps.c	Remove qemu-common.h include from most units	4 years ago
keymaps.h	ui: spelling fixes	3 years ago
meson.build	Revert "meson: Propagate gnutls dependency"	2 years ago
qemu-pixman.c	ui: refactor using a common qemu_pixman_shareable	2 years ago
qemu-x509.h	ui: move files to ui/ and include/ui/	14 years ago
qemu.desktop	ui: fix icon display for GTK frontend under GNOME Shell with Wayland	8 years ago
sdl2-2d.c	ui+display: rename is_placeholder() -> surface_is_placeholder()	2 years ago
sdl2-gl.c	qapi/ui: Drop temporary 'prefix'	2 years ago
sdl2-input.c	ui/sdl2: release all modifiers	2 years ago
sdl2.c	ui & main loop: Redesign of system-specific main thread event handling	2 years ago
shader.c	ui/shader: free associated programs	4 years ago
spice-app.c	include: Rename sysemu/ -> system/	2 years ago
spice-core.c	include: Rename sysemu/ -> system/	2 years ago
spice-display.c	ui/console: Convert mouse visibility parameter into bool	2 years ago
spice-input.c	input: Allow to choose console with qemu_input_is_absolute	3 years ago
spice-module.c	spice: wire up monitor in QemuSpiceOps.	6 years ago
trace-events	ui/dbus: add trace for can_share_map	2 years ago
trace.h	trace: switch position of headers to what Meson requires	6 years ago
udmabuf.c	Do not include "qemu/error-report.h" in headers that do not need it	4 years ago
ui-hmp-cmds.c	qmp/hmp: disable screendump if PIXMAN is missing	3 years ago
ui-qmp-cmds.c	ui/qmp-cmds: Improve two error messages	3 years ago
util.c	include/hw/pci: Split pci_device.h off pci.h	4 years ago
vdagent.c	ui/vdagent: send caps on fe_open	2 years ago
vgafont.h	ui: fix tab indentation	4 years ago
vnc-auth-sasl.c	ui: validate NUL byte padding in SASL client data more strictly	2 years ago
vnc-auth-sasl.h	vnc: avoid deprecation warnings for SASL on OS X	5 years ago
vnc-auth-vencrypt.c	vnc: fix resource leak when websocket channel error	6 years ago
vnc-auth-vencrypt.h	Clean up ill-advised or unusual header guards	10 years ago
vnc-clipboard.c	ui/vnc-clipboard: fix inflate_buffer	3 years ago
vnc-enc-hextile-template.h	ui/vnc-enc-hextile: Use static rather than dynamic length stack array	3 years ago
vnc-enc-hextile.c	Drop useless casts from g_malloc() & friends to pointer	4 years ago
vnc-enc-tight.c	ui/vnc-enc-tight: Avoid dynamic stack allocation	3 years ago
vnc-enc-tight.h	Clean up header guards that don't match their file name	10 years ago
vnc-enc-zlib.c	vnc: fix memory leak when vnc disconnect	7 years ago
vnc-enc-zrle.c	meson: rename included C source files to .c.inc	6 years ago
vnc-enc-zrle.c.inc	ui: Clean up local variable shadowing	3 years ago
vnc-enc-zrle.h	Clean up header guards that don't match their file name	10 years ago
vnc-enc-zywrle-template.c	ui: fix tab indentation	4 years ago
vnc-enc-zywrle.h	ui: spelling fixes	3 years ago
vnc-jobs.c	vnc: move assert in vnc_worker_thread_loop	3 years ago
vnc-jobs.h	ui/vnc: Drop unused vnc_has_job() and vnc_jobs_clear()	10 years ago
vnc-palette.c	ui: Clean up local variable shadowing	3 years ago
vnc-palette.h	Include qapi/qmp/qlist.h exactly where needed	9 years ago
vnc-stubs.c	qemu-options: define -vnc only #ifdef CONFIG_VNC	3 years ago
vnc-ws.c	bulk: Remove pointless QOM casts	3 years ago
vnc-ws.h	Clean up ill-advised or unusual header guards	10 years ago
vnc.c	include: Rename sysemu/ -> system/	2 years ago
vnc.h	ui/vnc: fix skipping SASL SSF on UNIX sockets	2 years ago
vnc_keysym.h	ui: fix tab indentation	4 years ago
win32-kbd-hook.c	include: Rename sysemu/ -> system/	2 years ago
x_keymap.c	ui: Fix memory leak in qemu_xkeymap_mapping_table()	5 years ago
x_keymap.h	ui: convert GTK and SDL1 frontends to keycodemapdb	9 years ago