Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 1 | /* |
| 2 | * QEMU System Emulator |
| 3 | * |
| 4 | * Copyright (c) 2003-2008 Fabrice Bellard |
| 5 | * |
| 6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 7 | * of this software and associated documentation files (the "Software"), to deal |
| 8 | * in the Software without restriction, including without limitation the rights |
| 9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 10 | * copies of the Software, and to permit persons to whom the Software is |
| 11 | * furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in |
| 14 | * all copies or substantial portions of the Software. |
| 15 | * |
| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| 22 | * THE SOFTWARE. |
| 23 | */ |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 24 | |
Peter Maydell | d38ea87 | 2016-01-29 17:50:05 +0000 | [diff] [blame] | 25 | #include "qemu/osdep.h" |
Markus Armbruster | da34e65 | 2016-03-14 09:01:28 +0100 | [diff] [blame] | 26 | #include "qapi/error.h" |
Veronia Bahaa | f348b6d | 2016-03-20 19:16:19 +0200 | [diff] [blame] | 27 | #include "qemu/cutils.h" |
Paolo Bonzini | 1de7afc | 2012-12-17 18:20:00 +0100 | [diff] [blame] | 28 | #include "qemu/timer.h" |
Claudio Fontana | 740b175 | 2020-08-19 13:17:19 +0200 | [diff] [blame] | 29 | #include "sysemu/cpu-timers.h" |
Alex Bennée | d759c95 | 2018-02-27 12:52:48 +0300 | [diff] [blame] | 30 | #include "sysemu/replay.h" |
Paolo Bonzini | 1de7afc | 2012-12-17 18:20:00 +0100 | [diff] [blame] | 31 | #include "qemu/main-loop.h" |
Paolo Bonzini | 737e150 | 2012-12-17 18:19:44 +0100 | [diff] [blame] | 32 | #include "block/aio.h" |
Nicolas Saenz Julienne | 71ad471 | 2022-04-25 09:57:23 +0200 | [diff] [blame] | 33 | #include "block/thread-pool.h" |
Alistair Francis | 8297be8 | 2017-09-11 12:52:53 -0700 | [diff] [blame] | 34 | #include "qemu/error-report.h" |
Paolo Bonzini | e9ed92b | 2019-07-12 19:34:35 +0200 | [diff] [blame] | 35 | #include "qemu/queue.h" |
Nicolas Saenz Julienne | 70ac26b | 2022-04-25 09:57:22 +0200 | [diff] [blame] | 36 | #include "qom/object.h" |
Paolo Bonzini | e9ed92b | 2019-07-12 19:34:35 +0200 | [diff] [blame] | 37 | |
| 38 | #ifndef _WIN32 |
| 39 | #include <sys/wait.h> |
| 40 | #endif |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 41 | |
| 42 | #ifndef _WIN32 |
| 43 | |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 44 | /* If we have signalfd, we mask out the signals we want to handle and then |
| 45 | * use signalfd to listen for them. We rely on whatever the current signal |
| 46 | * handler is to dispatch the signals when we receive them. |
| 47 | */ |
Daniele Buono | c905a36 | 2020-12-04 18:06:12 -0500 | [diff] [blame] | 48 | /* |
| 49 | * Disable CFI checks. |
| 50 | * We are going to call a signal hander directly. Such handler may or may not |
| 51 | * have been defined in our binary, so there's no guarantee that the pointer |
| 52 | * used to set the handler is a cfi-valid pointer. Since the handlers are |
| 53 | * stored in kernel memory, changing the handler to an attacker-defined |
| 54 | * function requires being able to call a sigaction() syscall, |
| 55 | * which is not as easy as overwriting a pointer in memory. |
| 56 | */ |
| 57 | QEMU_DISABLE_CFI |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 58 | static void sigfd_handler(void *opaque) |
| 59 | { |
| 60 | int fd = (intptr_t)opaque; |
| 61 | struct qemu_signalfd_siginfo info; |
| 62 | struct sigaction action; |
| 63 | ssize_t len; |
| 64 | |
| 65 | while (1) { |
Nikita Ivanov | 37b0b24 | 2022-10-23 12:04:22 +0300 | [diff] [blame] | 66 | len = RETRY_ON_EINTR(read(fd, &info, sizeof(info))); |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 67 | |
| 68 | if (len == -1 && errno == EAGAIN) { |
| 69 | break; |
| 70 | } |
| 71 | |
| 72 | if (len != sizeof(info)) { |
Thomas Huth | 372a87a | 2019-10-18 15:07:16 +0200 | [diff] [blame] | 73 | error_report("read from sigfd returned %zd: %s", len, |
| 74 | g_strerror(errno)); |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 75 | return; |
| 76 | } |
| 77 | |
| 78 | sigaction(info.ssi_signo, NULL, &action); |
| 79 | if ((action.sa_flags & SA_SIGINFO) && action.sa_sigaction) { |
Paolo Bonzini | d98d407 | 2017-02-08 13:22:12 +0100 | [diff] [blame] | 80 | sigaction_invoke(&action, &info); |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 81 | } else if (action.sa_handler) { |
| 82 | action.sa_handler(info.ssi_signo); |
| 83 | } |
| 84 | } |
| 85 | } |
| 86 | |
Fei Li | 7852433 | 2019-01-13 22:08:45 +0800 | [diff] [blame] | 87 | static int qemu_signal_init(Error **errp) |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 88 | { |
| 89 | int sigfd; |
| 90 | sigset_t set; |
| 91 | |
| 92 | /* |
| 93 | * SIG_IPI must be blocked in the main thread and must not be caught |
| 94 | * by sigwait() in the signal thread. Otherwise, the cpu thread will |
| 95 | * not catch it reliably. |
| 96 | */ |
| 97 | sigemptyset(&set); |
| 98 | sigaddset(&set, SIG_IPI); |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 99 | sigaddset(&set, SIGIO); |
| 100 | sigaddset(&set, SIGALRM); |
| 101 | sigaddset(&set, SIGBUS); |
Jan Kiszka | 3e9418e | 2014-10-27 14:13:02 +0000 | [diff] [blame] | 102 | /* SIGINT cannot be handled via signalfd, so that ^C can be used |
| 103 | * to interrupt QEMU when it is being run under gdb. SIGHUP and |
| 104 | * SIGTERM are also handled asynchronously, even though it is not |
| 105 | * strictly necessary, because they use the same handler as SIGINT. |
| 106 | */ |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 107 | pthread_sigmask(SIG_BLOCK, &set, NULL); |
| 108 | |
Lai Jiangshan | 4aa7534 | 2012-01-12 17:05:35 +0800 | [diff] [blame] | 109 | sigdelset(&set, SIG_IPI); |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 110 | sigfd = qemu_signalfd(&set); |
| 111 | if (sigfd == -1) { |
Fei Li | 7852433 | 2019-01-13 22:08:45 +0800 | [diff] [blame] | 112 | error_setg_errno(errp, errno, "failed to create signalfd"); |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 113 | return -errno; |
| 114 | } |
| 115 | |
Marc-André Lureau | 4d14cb0 | 2022-03-29 15:25:05 +0400 | [diff] [blame] | 116 | g_unix_set_fd_nonblocking(sigfd, true, NULL); |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 117 | |
Fam Zheng | 82e1cc4 | 2015-06-04 14:45:18 +0800 | [diff] [blame] | 118 | qemu_set_fd_handler(sigfd, sigfd_handler, NULL, (void *)(intptr_t)sigfd); |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 119 | |
| 120 | return 0; |
| 121 | } |
| 122 | |
| 123 | #else /* _WIN32 */ |
| 124 | |
Fei Li | 7852433 | 2019-01-13 22:08:45 +0800 | [diff] [blame] | 125 | static int qemu_signal_init(Error **errp) |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 126 | { |
| 127 | return 0; |
| 128 | } |
| 129 | #endif |
| 130 | |
Paolo Bonzini | f627aab | 2012-10-29 23:45:23 +0100 | [diff] [blame] | 131 | static AioContext *qemu_aio_context; |
Paolo Bonzini | edec47c | 2015-07-24 13:42:55 +0200 | [diff] [blame] | 132 | static QEMUBH *qemu_notify_bh; |
| 133 | |
| 134 | static void notify_event_cb(void *opaque) |
| 135 | { |
| 136 | /* No need to do anything; this bottom half is only used to |
| 137 | * kick the kernel out of ppoll/poll/WaitForMultipleObjects. |
| 138 | */ |
| 139 | } |
Paolo Bonzini | f627aab | 2012-10-29 23:45:23 +0100 | [diff] [blame] | 140 | |
Stefan Hajnoczi | 5f3aa1f | 2013-03-07 13:41:44 +0100 | [diff] [blame] | 141 | AioContext *qemu_get_aio_context(void) |
| 142 | { |
| 143 | return qemu_aio_context; |
| 144 | } |
| 145 | |
Paolo Bonzini | 4c8d0d2 | 2010-05-24 17:27:14 +0200 | [diff] [blame] | 146 | void qemu_notify_event(void) |
| 147 | { |
| 148 | if (!qemu_aio_context) { |
| 149 | return; |
| 150 | } |
Paolo Bonzini | edec47c | 2015-07-24 13:42:55 +0200 | [diff] [blame] | 151 | qemu_bh_schedule(qemu_notify_bh); |
Paolo Bonzini | 4c8d0d2 | 2010-05-24 17:27:14 +0200 | [diff] [blame] | 152 | } |
| 153 | |
Stefan Hajnoczi | cbff4b3 | 2013-02-20 11:28:25 +0100 | [diff] [blame] | 154 | static GArray *gpollfds; |
| 155 | |
Chrysostomos Nanakos | 2f78e49 | 2014-09-18 14:30:49 +0300 | [diff] [blame] | 156 | int qemu_init_main_loop(Error **errp) |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 157 | { |
| 158 | int ret; |
Paolo Bonzini | 82cbbdc | 2012-09-24 15:07:08 +0200 | [diff] [blame] | 159 | GSource *src; |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 160 | |
Paolo Bonzini | 3f53bc6 | 2017-03-03 11:50:29 +0100 | [diff] [blame] | 161 | init_clocks(qemu_timer_notify_cb); |
Paolo Bonzini | 172061a | 2012-10-29 15:28:36 +0100 | [diff] [blame] | 162 | |
Fei Li | 7852433 | 2019-01-13 22:08:45 +0800 | [diff] [blame] | 163 | ret = qemu_signal_init(errp); |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 164 | if (ret) { |
| 165 | return ret; |
| 166 | } |
| 167 | |
Markus Armbruster | 668f62e | 2020-07-07 18:06:02 +0200 | [diff] [blame] | 168 | qemu_aio_context = aio_context_new(errp); |
Chrysostomos Nanakos | 2f78e49 | 2014-09-18 14:30:49 +0300 | [diff] [blame] | 169 | if (!qemu_aio_context) { |
Chrysostomos Nanakos | 2f78e49 | 2014-09-18 14:30:49 +0300 | [diff] [blame] | 170 | return -EMFILE; |
| 171 | } |
Paolo Bonzini | 5f50be9 | 2021-06-09 14:22:34 +0200 | [diff] [blame] | 172 | qemu_set_current_aio_context(qemu_aio_context); |
Cao jin | 28ba61e | 2016-07-06 18:08:59 +0800 | [diff] [blame] | 173 | qemu_notify_bh = qemu_bh_new(notify_event_cb, NULL); |
Stefan Hajnoczi | cbff4b3 | 2013-02-20 11:28:25 +0100 | [diff] [blame] | 174 | gpollfds = g_array_new(FALSE, FALSE, sizeof(GPollFD)); |
Paolo Bonzini | 82cbbdc | 2012-09-24 15:07:08 +0200 | [diff] [blame] | 175 | src = aio_get_g_source(qemu_aio_context); |
Daniel P. Berrange | c3ff757 | 2016-09-30 15:34:24 +0100 | [diff] [blame] | 176 | g_source_set_name(src, "aio-context"); |
Paolo Bonzini | 82cbbdc | 2012-09-24 15:07:08 +0200 | [diff] [blame] | 177 | g_source_attach(src, NULL); |
| 178 | g_source_unref(src); |
Fam Zheng | f392694 | 2015-09-07 11:28:58 +0800 | [diff] [blame] | 179 | src = iohandler_get_g_source(); |
Daniel P. Berrange | c3ff757 | 2016-09-30 15:34:24 +0100 | [diff] [blame] | 180 | g_source_set_name(src, "io-handler"); |
Fam Zheng | f392694 | 2015-09-07 11:28:58 +0800 | [diff] [blame] | 181 | g_source_attach(src, NULL); |
| 182 | g_source_unref(src); |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 183 | return 0; |
| 184 | } |
| 185 | |
Nicolas Saenz Julienne | 70ac26b | 2022-04-25 09:57:22 +0200 | [diff] [blame] | 186 | static void main_loop_update_params(EventLoopBase *base, Error **errp) |
| 187 | { |
Nicolas Saenz Julienne | 71ad471 | 2022-04-25 09:57:23 +0200 | [diff] [blame] | 188 | ERRP_GUARD(); |
| 189 | |
Nicolas Saenz Julienne | 70ac26b | 2022-04-25 09:57:22 +0200 | [diff] [blame] | 190 | if (!qemu_aio_context) { |
| 191 | error_setg(errp, "qemu aio context not ready"); |
| 192 | return; |
| 193 | } |
| 194 | |
| 195 | aio_context_set_aio_params(qemu_aio_context, base->aio_max_batch, errp); |
Nicolas Saenz Julienne | 71ad471 | 2022-04-25 09:57:23 +0200 | [diff] [blame] | 196 | if (*errp) { |
| 197 | return; |
| 198 | } |
| 199 | |
| 200 | aio_context_set_thread_pool_params(qemu_aio_context, base->thread_pool_min, |
| 201 | base->thread_pool_max, errp); |
Nicolas Saenz Julienne | 70ac26b | 2022-04-25 09:57:22 +0200 | [diff] [blame] | 202 | } |
| 203 | |
| 204 | MainLoop *mloop; |
| 205 | |
| 206 | static void main_loop_init(EventLoopBase *base, Error **errp) |
| 207 | { |
| 208 | MainLoop *m = MAIN_LOOP(base); |
| 209 | |
| 210 | if (mloop) { |
| 211 | error_setg(errp, "only one main-loop instance allowed"); |
| 212 | return; |
| 213 | } |
| 214 | |
| 215 | main_loop_update_params(base, errp); |
| 216 | |
| 217 | mloop = m; |
| 218 | return; |
| 219 | } |
| 220 | |
| 221 | static bool main_loop_can_be_deleted(EventLoopBase *base) |
| 222 | { |
| 223 | return false; |
| 224 | } |
| 225 | |
| 226 | static void main_loop_class_init(ObjectClass *oc, void *class_data) |
| 227 | { |
| 228 | EventLoopBaseClass *bc = EVENT_LOOP_BASE_CLASS(oc); |
| 229 | |
| 230 | bc->init = main_loop_init; |
| 231 | bc->update_params = main_loop_update_params; |
| 232 | bc->can_be_deleted = main_loop_can_be_deleted; |
| 233 | } |
| 234 | |
| 235 | static const TypeInfo main_loop_info = { |
| 236 | .name = TYPE_MAIN_LOOP, |
| 237 | .parent = TYPE_EVENT_LOOP_BASE, |
| 238 | .class_init = main_loop_class_init, |
| 239 | .instance_size = sizeof(MainLoop), |
| 240 | }; |
| 241 | |
| 242 | static void main_loop_register_types(void) |
| 243 | { |
| 244 | type_register_static(&main_loop_info); |
| 245 | } |
| 246 | |
| 247 | type_init(main_loop_register_types) |
| 248 | |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 249 | static int max_priority; |
| 250 | |
Paolo Bonzini | ea26ce7 | 2012-03-20 10:49:21 +0100 | [diff] [blame] | 251 | #ifndef _WIN32 |
Stefan Hajnoczi | 48ce11f | 2013-02-20 11:28:26 +0100 | [diff] [blame] | 252 | static int glib_pollfds_idx; |
| 253 | static int glib_n_poll_fds; |
| 254 | |
Alex Bligh | 7b595f3 | 2013-08-21 16:02:54 +0100 | [diff] [blame] | 255 | static void glib_pollfds_fill(int64_t *cur_timeout) |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 256 | { |
| 257 | GMainContext *context = g_main_context_default(); |
Paolo Bonzini | 4dae83a | 2012-03-20 10:49:17 +0100 | [diff] [blame] | 258 | int timeout = 0; |
Alex Bligh | 7b595f3 | 2013-08-21 16:02:54 +0100 | [diff] [blame] | 259 | int64_t timeout_ns; |
Stefan Hajnoczi | 48ce11f | 2013-02-20 11:28:26 +0100 | [diff] [blame] | 260 | int n; |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 261 | |
| 262 | g_main_context_prepare(context, &max_priority); |
| 263 | |
Stefan Hajnoczi | 48ce11f | 2013-02-20 11:28:26 +0100 | [diff] [blame] | 264 | glib_pollfds_idx = gpollfds->len; |
| 265 | n = glib_n_poll_fds; |
| 266 | do { |
| 267 | GPollFD *pfds; |
| 268 | glib_n_poll_fds = n; |
| 269 | g_array_set_size(gpollfds, glib_pollfds_idx + glib_n_poll_fds); |
| 270 | pfds = &g_array_index(gpollfds, GPollFD, glib_pollfds_idx); |
| 271 | n = g_main_context_query(context, max_priority, &timeout, pfds, |
| 272 | glib_n_poll_fds); |
| 273 | } while (n != glib_n_poll_fds); |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 274 | |
Alex Bligh | 7b595f3 | 2013-08-21 16:02:54 +0100 | [diff] [blame] | 275 | if (timeout < 0) { |
| 276 | timeout_ns = -1; |
| 277 | } else { |
| 278 | timeout_ns = (int64_t)timeout * (int64_t)SCALE_MS; |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 279 | } |
Alex Bligh | 7b595f3 | 2013-08-21 16:02:54 +0100 | [diff] [blame] | 280 | |
| 281 | *cur_timeout = qemu_soonest_timeout(timeout_ns, *cur_timeout); |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 282 | } |
| 283 | |
Stefan Hajnoczi | 48ce11f | 2013-02-20 11:28:26 +0100 | [diff] [blame] | 284 | static void glib_pollfds_poll(void) |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 285 | { |
| 286 | GMainContext *context = g_main_context_default(); |
Stefan Hajnoczi | 48ce11f | 2013-02-20 11:28:26 +0100 | [diff] [blame] | 287 | GPollFD *pfds = &g_array_index(gpollfds, GPollFD, glib_pollfds_idx); |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 288 | |
Stefan Hajnoczi | 48ce11f | 2013-02-20 11:28:26 +0100 | [diff] [blame] | 289 | if (g_main_context_check(context, max_priority, pfds, glib_n_poll_fds)) { |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 290 | g_main_context_dispatch(context); |
| 291 | } |
| 292 | } |
| 293 | |
Anthony Liguori | 893986f | 2013-04-05 08:46:00 -0500 | [diff] [blame] | 294 | #define MAX_MAIN_LOOP_SPIN (1000) |
| 295 | |
Alex Bligh | 7b595f3 | 2013-08-21 16:02:54 +0100 | [diff] [blame] | 296 | static int os_host_main_loop_wait(int64_t timeout) |
Paolo Bonzini | 1545553 | 2012-03-20 10:49:18 +0100 | [diff] [blame] | 297 | { |
Richard W.M. Jones | ecbddbb | 2017-03-31 21:51:33 +0100 | [diff] [blame] | 298 | GMainContext *context = g_main_context_default(); |
Paolo Bonzini | 1545553 | 2012-03-20 10:49:18 +0100 | [diff] [blame] | 299 | int ret; |
| 300 | |
Richard W.M. Jones | ecbddbb | 2017-03-31 21:51:33 +0100 | [diff] [blame] | 301 | g_main_context_acquire(context); |
| 302 | |
Stefan Hajnoczi | 48ce11f | 2013-02-20 11:28:26 +0100 | [diff] [blame] | 303 | glib_pollfds_fill(&timeout); |
Paolo Bonzini | 1545553 | 2012-03-20 10:49:18 +0100 | [diff] [blame] | 304 | |
Alex Bennée | d759c95 | 2018-02-27 12:52:48 +0300 | [diff] [blame] | 305 | qemu_mutex_unlock_iothread(); |
| 306 | replay_mutex_unlock(); |
Paolo Bonzini | 1545553 | 2012-03-20 10:49:18 +0100 | [diff] [blame] | 307 | |
Alex Bligh | 7b595f3 | 2013-08-21 16:02:54 +0100 | [diff] [blame] | 308 | ret = qemu_poll_ns((GPollFD *)gpollfds->data, gpollfds->len, timeout); |
Stefan Hajnoczi | cbff4b3 | 2013-02-20 11:28:25 +0100 | [diff] [blame] | 309 | |
Alex Bennée | d759c95 | 2018-02-27 12:52:48 +0300 | [diff] [blame] | 310 | replay_mutex_lock(); |
| 311 | qemu_mutex_lock_iothread(); |
Paolo Bonzini | 1545553 | 2012-03-20 10:49:18 +0100 | [diff] [blame] | 312 | |
Stefan Hajnoczi | 48ce11f | 2013-02-20 11:28:26 +0100 | [diff] [blame] | 313 | glib_pollfds_poll(); |
Richard W.M. Jones | ecbddbb | 2017-03-31 21:51:33 +0100 | [diff] [blame] | 314 | |
| 315 | g_main_context_release(context); |
| 316 | |
Paolo Bonzini | 1545553 | 2012-03-20 10:49:18 +0100 | [diff] [blame] | 317 | return ret; |
| 318 | } |
| 319 | #else |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 320 | /***********************************************************/ |
| 321 | /* Polling handling */ |
| 322 | |
| 323 | typedef struct PollingEntry { |
| 324 | PollingFunc *func; |
| 325 | void *opaque; |
| 326 | struct PollingEntry *next; |
| 327 | } PollingEntry; |
| 328 | |
| 329 | static PollingEntry *first_polling_entry; |
| 330 | |
| 331 | int qemu_add_polling_cb(PollingFunc *func, void *opaque) |
| 332 | { |
| 333 | PollingEntry **ppe, *pe; |
Markus Armbruster | b21e238 | 2022-03-15 15:41:56 +0100 | [diff] [blame] | 334 | pe = g_new0(PollingEntry, 1); |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 335 | pe->func = func; |
| 336 | pe->opaque = opaque; |
| 337 | for(ppe = &first_polling_entry; *ppe != NULL; ppe = &(*ppe)->next); |
| 338 | *ppe = pe; |
| 339 | return 0; |
| 340 | } |
| 341 | |
| 342 | void qemu_del_polling_cb(PollingFunc *func, void *opaque) |
| 343 | { |
| 344 | PollingEntry **ppe, *pe; |
| 345 | for(ppe = &first_polling_entry; *ppe != NULL; ppe = &(*ppe)->next) { |
| 346 | pe = *ppe; |
| 347 | if (pe->func == func && pe->opaque == opaque) { |
| 348 | *ppe = pe->next; |
| 349 | g_free(pe); |
| 350 | break; |
| 351 | } |
| 352 | } |
| 353 | } |
| 354 | |
| 355 | /***********************************************************/ |
| 356 | /* Wait objects support */ |
| 357 | typedef struct WaitObjects { |
| 358 | int num; |
Bin Meng | 4f76b3d | 2022-10-19 18:20:13 +0800 | [diff] [blame] | 359 | int revents[MAXIMUM_WAIT_OBJECTS]; |
| 360 | HANDLE events[MAXIMUM_WAIT_OBJECTS]; |
| 361 | WaitObjectFunc *func[MAXIMUM_WAIT_OBJECTS]; |
| 362 | void *opaque[MAXIMUM_WAIT_OBJECTS]; |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 363 | } WaitObjects; |
| 364 | |
| 365 | static WaitObjects wait_objects = {0}; |
| 366 | |
| 367 | int qemu_add_wait_object(HANDLE handle, WaitObjectFunc *func, void *opaque) |
| 368 | { |
Bin Meng | d393b0a | 2022-10-19 18:20:14 +0800 | [diff] [blame] | 369 | int i; |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 370 | WaitObjects *w = &wait_objects; |
Bin Meng | d393b0a | 2022-10-19 18:20:14 +0800 | [diff] [blame] | 371 | |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 372 | if (w->num >= MAXIMUM_WAIT_OBJECTS) { |
| 373 | return -1; |
| 374 | } |
Bin Meng | d393b0a | 2022-10-19 18:20:14 +0800 | [diff] [blame] | 375 | |
| 376 | for (i = 0; i < w->num; i++) { |
| 377 | /* check if the same handle is added twice */ |
| 378 | if (w->events[i] == handle) { |
| 379 | return -1; |
| 380 | } |
| 381 | } |
| 382 | |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 383 | w->events[w->num] = handle; |
| 384 | w->func[w->num] = func; |
| 385 | w->opaque[w->num] = opaque; |
Paolo Bonzini | 06ac7d4 | 2012-03-20 10:49:20 +0100 | [diff] [blame] | 386 | w->revents[w->num] = 0; |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 387 | w->num++; |
| 388 | return 0; |
| 389 | } |
| 390 | |
| 391 | void qemu_del_wait_object(HANDLE handle, WaitObjectFunc *func, void *opaque) |
| 392 | { |
| 393 | int i, found; |
| 394 | WaitObjects *w = &wait_objects; |
| 395 | |
| 396 | found = 0; |
| 397 | for (i = 0; i < w->num; i++) { |
| 398 | if (w->events[i] == handle) { |
| 399 | found = 1; |
| 400 | } |
Bin Meng | 4f76b3d | 2022-10-19 18:20:13 +0800 | [diff] [blame] | 401 | if (found && i < (MAXIMUM_WAIT_OBJECTS - 1)) { |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 402 | w->events[i] = w->events[i + 1]; |
| 403 | w->func[i] = w->func[i + 1]; |
| 404 | w->opaque[i] = w->opaque[i + 1]; |
Paolo Bonzini | 06ac7d4 | 2012-03-20 10:49:20 +0100 | [diff] [blame] | 405 | w->revents[i] = w->revents[i + 1]; |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 406 | } |
| 407 | } |
| 408 | if (found) { |
| 409 | w->num--; |
| 410 | } |
| 411 | } |
| 412 | |
Stefan Hajnoczi | cbff4b3 | 2013-02-20 11:28:25 +0100 | [diff] [blame] | 413 | static int pollfds_fill(GArray *pollfds, fd_set *rfds, fd_set *wfds, |
| 414 | fd_set *xfds) |
| 415 | { |
| 416 | int nfds = -1; |
| 417 | int i; |
| 418 | |
| 419 | for (i = 0; i < pollfds->len; i++) { |
| 420 | GPollFD *pfd = &g_array_index(pollfds, GPollFD, i); |
| 421 | int fd = pfd->fd; |
| 422 | int events = pfd->events; |
Stefan Hajnoczi | 8db165b | 2013-05-16 17:36:00 +0200 | [diff] [blame] | 423 | if (events & G_IO_IN) { |
Stefan Hajnoczi | cbff4b3 | 2013-02-20 11:28:25 +0100 | [diff] [blame] | 424 | FD_SET(fd, rfds); |
| 425 | nfds = MAX(nfds, fd); |
| 426 | } |
Stefan Hajnoczi | 8db165b | 2013-05-16 17:36:00 +0200 | [diff] [blame] | 427 | if (events & G_IO_OUT) { |
Stefan Hajnoczi | cbff4b3 | 2013-02-20 11:28:25 +0100 | [diff] [blame] | 428 | FD_SET(fd, wfds); |
| 429 | nfds = MAX(nfds, fd); |
| 430 | } |
| 431 | if (events & G_IO_PRI) { |
| 432 | FD_SET(fd, xfds); |
| 433 | nfds = MAX(nfds, fd); |
| 434 | } |
| 435 | } |
| 436 | return nfds; |
| 437 | } |
| 438 | |
| 439 | static void pollfds_poll(GArray *pollfds, int nfds, fd_set *rfds, |
| 440 | fd_set *wfds, fd_set *xfds) |
| 441 | { |
| 442 | int i; |
| 443 | |
| 444 | for (i = 0; i < pollfds->len; i++) { |
| 445 | GPollFD *pfd = &g_array_index(pollfds, GPollFD, i); |
| 446 | int fd = pfd->fd; |
| 447 | int revents = 0; |
| 448 | |
| 449 | if (FD_ISSET(fd, rfds)) { |
Stefan Hajnoczi | 8db165b | 2013-05-16 17:36:00 +0200 | [diff] [blame] | 450 | revents |= G_IO_IN; |
Stefan Hajnoczi | cbff4b3 | 2013-02-20 11:28:25 +0100 | [diff] [blame] | 451 | } |
| 452 | if (FD_ISSET(fd, wfds)) { |
Stefan Hajnoczi | 8db165b | 2013-05-16 17:36:00 +0200 | [diff] [blame] | 453 | revents |= G_IO_OUT; |
Stefan Hajnoczi | cbff4b3 | 2013-02-20 11:28:25 +0100 | [diff] [blame] | 454 | } |
| 455 | if (FD_ISSET(fd, xfds)) { |
| 456 | revents |= G_IO_PRI; |
| 457 | } |
| 458 | pfd->revents = revents & pfd->events; |
| 459 | } |
| 460 | } |
| 461 | |
Alex Bligh | 7b595f3 | 2013-08-21 16:02:54 +0100 | [diff] [blame] | 462 | static int os_host_main_loop_wait(int64_t timeout) |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 463 | { |
Paolo Bonzini | ea26ce7 | 2012-03-20 10:49:21 +0100 | [diff] [blame] | 464 | GMainContext *context = g_main_context_default(); |
Stefan Hajnoczi | 48ce11f | 2013-02-20 11:28:26 +0100 | [diff] [blame] | 465 | GPollFD poll_fds[1024 * 2]; /* this is probably overkill */ |
Stefan Hajnoczi | 134a03e | 2013-02-20 11:28:24 +0100 | [diff] [blame] | 466 | int select_ret = 0; |
Stefan Hajnoczi | 48ce11f | 2013-02-20 11:28:26 +0100 | [diff] [blame] | 467 | int g_poll_ret, ret, i, n_poll_fds; |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 468 | PollingEntry *pe; |
Paolo Bonzini | d3385eb | 2012-03-20 10:49:19 +0100 | [diff] [blame] | 469 | WaitObjects *w = &wait_objects; |
Stefan Weil | 42fe1c2 | 2012-04-27 17:02:08 +0200 | [diff] [blame] | 470 | gint poll_timeout; |
Alex Bligh | 7b595f3 | 2013-08-21 16:02:54 +0100 | [diff] [blame] | 471 | int64_t poll_timeout_ns; |
Paolo Bonzini | 1545553 | 2012-03-20 10:49:18 +0100 | [diff] [blame] | 472 | static struct timeval tv0; |
Stefan Hajnoczi | 9cbaacf | 2013-02-20 11:28:30 +0100 | [diff] [blame] | 473 | fd_set rfds, wfds, xfds; |
| 474 | int nfds; |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 475 | |
Richard W.M. Jones | ecbddbb | 2017-03-31 21:51:33 +0100 | [diff] [blame] | 476 | g_main_context_acquire(context); |
| 477 | |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 478 | /* XXX: need to suppress polling by better using win32 events */ |
| 479 | ret = 0; |
| 480 | for (pe = first_polling_entry; pe != NULL; pe = pe->next) { |
| 481 | ret |= pe->func(pe->opaque); |
| 482 | } |
Paolo Bonzini | d3385eb | 2012-03-20 10:49:19 +0100 | [diff] [blame] | 483 | if (ret != 0) { |
Richard W.M. Jones | ecbddbb | 2017-03-31 21:51:33 +0100 | [diff] [blame] | 484 | g_main_context_release(context); |
Paolo Bonzini | d3385eb | 2012-03-20 10:49:19 +0100 | [diff] [blame] | 485 | return ret; |
| 486 | } |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 487 | |
Stefan Hajnoczi | 3cb8c20 | 2013-05-16 17:36:01 +0200 | [diff] [blame] | 488 | FD_ZERO(&rfds); |
| 489 | FD_ZERO(&wfds); |
| 490 | FD_ZERO(&xfds); |
| 491 | nfds = pollfds_fill(gpollfds, &rfds, &wfds, &xfds); |
| 492 | if (nfds >= 0) { |
| 493 | select_ret = select(nfds + 1, &rfds, &wfds, &xfds, &tv0); |
| 494 | if (select_ret != 0) { |
| 495 | timeout = 0; |
| 496 | } |
| 497 | if (select_ret > 0) { |
| 498 | pollfds_poll(gpollfds, nfds, &rfds, &wfds, &xfds); |
| 499 | } |
| 500 | } |
| 501 | |
Paolo Bonzini | ea26ce7 | 2012-03-20 10:49:21 +0100 | [diff] [blame] | 502 | g_main_context_prepare(context, &max_priority); |
Stefan Weil | 42fe1c2 | 2012-04-27 17:02:08 +0200 | [diff] [blame] | 503 | n_poll_fds = g_main_context_query(context, max_priority, &poll_timeout, |
Paolo Bonzini | ea26ce7 | 2012-03-20 10:49:21 +0100 | [diff] [blame] | 504 | poll_fds, ARRAY_SIZE(poll_fds)); |
Lidong Chen | 6512e34 | 2019-06-19 15:14:47 -0400 | [diff] [blame] | 505 | g_assert(n_poll_fds + w->num <= ARRAY_SIZE(poll_fds)); |
Paolo Bonzini | ea26ce7 | 2012-03-20 10:49:21 +0100 | [diff] [blame] | 506 | |
Paolo Bonzini | 06ac7d4 | 2012-03-20 10:49:20 +0100 | [diff] [blame] | 507 | for (i = 0; i < w->num; i++) { |
Stefan Weil | 58b9630 | 2012-04-12 20:42:34 +0200 | [diff] [blame] | 508 | poll_fds[n_poll_fds + i].fd = (DWORD_PTR)w->events[i]; |
Paolo Bonzini | ea26ce7 | 2012-03-20 10:49:21 +0100 | [diff] [blame] | 509 | poll_fds[n_poll_fds + i].events = G_IO_IN; |
Paolo Bonzini | d3385eb | 2012-03-20 10:49:19 +0100 | [diff] [blame] | 510 | } |
| 511 | |
Alex Bligh | 7b595f3 | 2013-08-21 16:02:54 +0100 | [diff] [blame] | 512 | if (poll_timeout < 0) { |
| 513 | poll_timeout_ns = -1; |
| 514 | } else { |
| 515 | poll_timeout_ns = (int64_t)poll_timeout * (int64_t)SCALE_MS; |
Stefan Weil | 3239ad0 | 2012-04-29 19:15:02 +0200 | [diff] [blame] | 516 | } |
| 517 | |
Alex Bligh | 7b595f3 | 2013-08-21 16:02:54 +0100 | [diff] [blame] | 518 | poll_timeout_ns = qemu_soonest_timeout(poll_timeout_ns, timeout); |
| 519 | |
Paolo Bonzini | 06ac7d4 | 2012-03-20 10:49:20 +0100 | [diff] [blame] | 520 | qemu_mutex_unlock_iothread(); |
Alex Bennée | d759c95 | 2018-02-27 12:52:48 +0300 | [diff] [blame] | 521 | |
| 522 | replay_mutex_unlock(); |
| 523 | |
Alex Bligh | 7b595f3 | 2013-08-21 16:02:54 +0100 | [diff] [blame] | 524 | g_poll_ret = qemu_poll_ns(poll_fds, n_poll_fds + w->num, poll_timeout_ns); |
| 525 | |
Alex Bennée | d759c95 | 2018-02-27 12:52:48 +0300 | [diff] [blame] | 526 | replay_mutex_lock(); |
| 527 | |
Paolo Bonzini | 06ac7d4 | 2012-03-20 10:49:20 +0100 | [diff] [blame] | 528 | qemu_mutex_lock_iothread(); |
Fabien Chouteau | 5e3bc73 | 2013-01-08 16:30:56 +0100 | [diff] [blame] | 529 | if (g_poll_ret > 0) { |
Paolo Bonzini | 06ac7d4 | 2012-03-20 10:49:20 +0100 | [diff] [blame] | 530 | for (i = 0; i < w->num; i++) { |
Paolo Bonzini | ea26ce7 | 2012-03-20 10:49:21 +0100 | [diff] [blame] | 531 | w->revents[i] = poll_fds[n_poll_fds + i].revents; |
Paolo Bonzini | 06ac7d4 | 2012-03-20 10:49:20 +0100 | [diff] [blame] | 532 | } |
| 533 | for (i = 0; i < w->num; i++) { |
| 534 | if (w->revents[i] && w->func[i]) { |
| 535 | w->func[i](w->opaque[i]); |
| 536 | } |
| 537 | } |
| 538 | } |
Paolo Bonzini | d3385eb | 2012-03-20 10:49:19 +0100 | [diff] [blame] | 539 | |
Paolo Bonzini | ea26ce7 | 2012-03-20 10:49:21 +0100 | [diff] [blame] | 540 | if (g_main_context_check(context, max_priority, poll_fds, n_poll_fds)) { |
| 541 | g_main_context_dispatch(context); |
| 542 | } |
| 543 | |
Richard W.M. Jones | ecbddbb | 2017-03-31 21:51:33 +0100 | [diff] [blame] | 544 | g_main_context_release(context); |
| 545 | |
Fabien Chouteau | 5e3bc73 | 2013-01-08 16:30:56 +0100 | [diff] [blame] | 546 | return select_ret || g_poll_ret; |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 547 | } |
| 548 | #endif |
| 549 | |
Marc-André Lureau | 1ab67b9 | 2019-01-17 15:43:55 +0400 | [diff] [blame] | 550 | static NotifierList main_loop_poll_notifiers = |
| 551 | NOTIFIER_LIST_INITIALIZER(main_loop_poll_notifiers); |
| 552 | |
| 553 | void main_loop_poll_add_notifier(Notifier *notify) |
| 554 | { |
| 555 | notifier_list_add(&main_loop_poll_notifiers, notify); |
| 556 | } |
| 557 | |
| 558 | void main_loop_poll_remove_notifier(Notifier *notify) |
| 559 | { |
| 560 | notifier_remove(notify); |
| 561 | } |
| 562 | |
Peter Maydell | de5f852 | 2017-06-27 18:32:49 +0100 | [diff] [blame] | 563 | void main_loop_wait(int nonblocking) |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 564 | { |
Marc-André Lureau | 1ab67b9 | 2019-01-17 15:43:55 +0400 | [diff] [blame] | 565 | MainLoopPoll mlpoll = { |
| 566 | .state = MAIN_LOOP_POLL_FILL, |
| 567 | .timeout = UINT32_MAX, |
| 568 | .pollfds = gpollfds, |
| 569 | }; |
Stefano Stabellini | 7c7db75 | 2012-04-13 19:35:04 +0100 | [diff] [blame] | 570 | int ret; |
Alex Bligh | 7b595f3 | 2013-08-21 16:02:54 +0100 | [diff] [blame] | 571 | int64_t timeout_ns; |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 572 | |
| 573 | if (nonblocking) { |
Marc-André Lureau | 1ab67b9 | 2019-01-17 15:43:55 +0400 | [diff] [blame] | 574 | mlpoll.timeout = 0; |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 575 | } |
| 576 | |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 577 | /* poll any events */ |
Stefan Hajnoczi | cbff4b3 | 2013-02-20 11:28:25 +0100 | [diff] [blame] | 578 | g_array_set_size(gpollfds, 0); /* reset for new iteration */ |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 579 | /* XXX: separate device handlers from system ones */ |
Marc-André Lureau | 1ab67b9 | 2019-01-17 15:43:55 +0400 | [diff] [blame] | 580 | notifier_list_notify(&main_loop_poll_notifiers, &mlpoll); |
Alex Bligh | 7b595f3 | 2013-08-21 16:02:54 +0100 | [diff] [blame] | 581 | |
Marc-André Lureau | 1ab67b9 | 2019-01-17 15:43:55 +0400 | [diff] [blame] | 582 | if (mlpoll.timeout == UINT32_MAX) { |
Alex Bligh | 7b595f3 | 2013-08-21 16:02:54 +0100 | [diff] [blame] | 583 | timeout_ns = -1; |
| 584 | } else { |
Marc-André Lureau | 1ab67b9 | 2019-01-17 15:43:55 +0400 | [diff] [blame] | 585 | timeout_ns = (uint64_t)mlpoll.timeout * (int64_t)(SCALE_MS); |
Alex Bligh | 7b595f3 | 2013-08-21 16:02:54 +0100 | [diff] [blame] | 586 | } |
| 587 | |
| 588 | timeout_ns = qemu_soonest_timeout(timeout_ns, |
| 589 | timerlistgroup_deadline_ns( |
| 590 | &main_loop_tlg)); |
| 591 | |
| 592 | ret = os_host_main_loop_wait(timeout_ns); |
Marc-André Lureau | 1ab67b9 | 2019-01-17 15:43:55 +0400 | [diff] [blame] | 593 | mlpoll.state = ret < 0 ? MAIN_LOOP_POLL_ERR : MAIN_LOOP_POLL_OK; |
| 594 | notifier_list_notify(&main_loop_poll_notifiers, &mlpoll); |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 595 | |
Claudio Fontana | 740b175 | 2020-08-19 13:17:19 +0200 | [diff] [blame] | 596 | if (icount_enabled()) { |
| 597 | /* |
| 598 | * CPU thread can infinitely wait for event after |
| 599 | * missing the warp |
| 600 | */ |
Claudio Fontana | 8191d36 | 2020-08-31 16:18:34 +0200 | [diff] [blame] | 601 | icount_start_warp_timer(); |
Claudio Fontana | 740b175 | 2020-08-19 13:17:19 +0200 | [diff] [blame] | 602 | } |
Alex Bligh | 40daca5 | 2013-08-21 16:03:02 +0100 | [diff] [blame] | 603 | qemu_clock_run_all_timers(); |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 604 | } |
Paolo Bonzini | f627aab | 2012-10-29 23:45:23 +0100 | [diff] [blame] | 605 | |
| 606 | /* Functions to operate on the main QEMU AioContext. */ |
| 607 | |
Alexander Bulekov | 9c86c97 | 2023-04-27 17:10:07 -0400 | [diff] [blame] | 608 | QEMUBH *qemu_bh_new_full(QEMUBHFunc *cb, void *opaque, const char *name, |
| 609 | MemReentrancyGuard *reentrancy_guard) |
Paolo Bonzini | f627aab | 2012-10-29 23:45:23 +0100 | [diff] [blame] | 610 | { |
Alexander Bulekov | 9c86c97 | 2023-04-27 17:10:07 -0400 | [diff] [blame] | 611 | return aio_bh_new_full(qemu_aio_context, cb, opaque, name, |
| 612 | reentrancy_guard); |
Paolo Bonzini | f627aab | 2012-10-29 23:45:23 +0100 | [diff] [blame] | 613 | } |
Paolo Bonzini | e9ed92b | 2019-07-12 19:34:35 +0200 | [diff] [blame] | 614 | |
| 615 | /* |
| 616 | * Functions to operate on the I/O handler AioContext. |
| 617 | * This context runs on top of main loop. We can't reuse qemu_aio_context |
| 618 | * because iohandlers mustn't be polled by aio_poll(qemu_aio_context). |
| 619 | */ |
| 620 | static AioContext *iohandler_ctx; |
| 621 | |
| 622 | static void iohandler_init(void) |
| 623 | { |
| 624 | if (!iohandler_ctx) { |
| 625 | iohandler_ctx = aio_context_new(&error_abort); |
| 626 | } |
| 627 | } |
| 628 | |
| 629 | AioContext *iohandler_get_aio_context(void) |
| 630 | { |
| 631 | iohandler_init(); |
| 632 | return iohandler_ctx; |
| 633 | } |
| 634 | |
| 635 | GSource *iohandler_get_g_source(void) |
| 636 | { |
| 637 | iohandler_init(); |
| 638 | return aio_get_g_source(iohandler_ctx); |
| 639 | } |
| 640 | |
| 641 | void qemu_set_fd_handler(int fd, |
| 642 | IOHandler *fd_read, |
| 643 | IOHandler *fd_write, |
| 644 | void *opaque) |
| 645 | { |
| 646 | iohandler_init(); |
Stefan Hajnoczi | 60f782b | 2023-05-16 15:02:38 -0400 | [diff] [blame] | 647 | aio_set_fd_handler(iohandler_ctx, fd, fd_read, fd_write, NULL, NULL, |
| 648 | opaque); |
Paolo Bonzini | e9ed92b | 2019-07-12 19:34:35 +0200 | [diff] [blame] | 649 | } |
| 650 | |
| 651 | void event_notifier_set_handler(EventNotifier *e, |
| 652 | EventNotifierHandler *handler) |
| 653 | { |
| 654 | iohandler_init(); |
Stefan Hajnoczi | 60f782b | 2023-05-16 15:02:38 -0400 | [diff] [blame] | 655 | aio_set_event_notifier(iohandler_ctx, e, handler, NULL, NULL); |
Paolo Bonzini | e9ed92b | 2019-07-12 19:34:35 +0200 | [diff] [blame] | 656 | } |