Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [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 | */ |
| 24 | |
Peter Maydell | 7b31bbc | 2016-01-26 18:16:56 +0000 | [diff] [blame] | 25 | #include "qemu/osdep.h" |
Paolo Bonzini | 83c9089 | 2012-12-17 18:19:49 +0100 | [diff] [blame] | 26 | #include "monitor/monitor.h" |
Stefan Hajnoczi | d5d2b15 | 2022-02-22 14:01:50 +0000 | [diff] [blame] | 27 | #include "qemu/coroutine-tls.h" |
Markus Armbruster | e688df6 | 2018-02-01 12:18:31 +0100 | [diff] [blame] | 28 | #include "qapi/error.h" |
Philippe Mathieu-Daudé | df7a1f48 | 2020-10-12 14:15:32 +0200 | [diff] [blame] | 29 | #include "qapi/qapi-commands-machine.h" |
Markus Armbruster | 112ed24 | 2018-02-26 17:13:27 -0600 | [diff] [blame] | 30 | #include "qapi/qapi-commands-misc.h" |
Markus Armbruster | 9af2398 | 2018-02-11 10:36:01 +0100 | [diff] [blame] | 31 | #include "qapi/qapi-events-run-state.h" |
Wenchao Xia | a4e15de | 2014-06-18 08:43:36 +0200 | [diff] [blame] | 32 | #include "qapi/qmp/qerror.h" |
Paolo Bonzini | 022c62c | 2012-12-17 18:19:49 +0100 | [diff] [blame] | 33 | #include "exec/gdbstub.h" |
Vincent Palatin | b394662 | 2017-01-10 11:59:55 +0100 | [diff] [blame] | 34 | #include "sysemu/hw_accel.h" |
Philippe Mathieu-Daudé | 73842ef | 2022-02-03 02:13:28 +0100 | [diff] [blame] | 35 | #include "exec/cpu-common.h" |
Paolo Bonzini | 1de7afc | 2012-12-17 18:20:00 +0100 | [diff] [blame] | 36 | #include "qemu/thread.h" |
Markus Armbruster | e2c1c34 | 2022-12-21 14:35:49 +0100 | [diff] [blame] | 37 | #include "qemu/main-loop.h" |
Emilio G. Cota | 30865f3 | 2018-10-21 13:30:35 -0400 | [diff] [blame] | 38 | #include "qemu/plugin.h" |
Paolo Bonzini | 9c17d61 | 2012-12-17 18:20:04 +0100 | [diff] [blame] | 39 | #include "sysemu/cpus.h" |
Richard Henderson | 9c09a25 | 2019-03-14 13:06:29 -0700 | [diff] [blame] | 40 | #include "qemu/guest-random.h" |
Alexey Kardashevskiy | 9cb805f | 2014-08-20 22:16:33 +1000 | [diff] [blame] | 41 | #include "hw/nmi.h" |
Pavel Dovgalyuk | 8b42704 | 2015-09-17 19:24:05 +0300 | [diff] [blame] | 42 | #include "sysemu/replay.h" |
Markus Armbruster | 54d3123 | 2019-08-12 07:23:59 +0200 | [diff] [blame] | 43 | #include "sysemu/runstate.h" |
Claudio Fontana | 740b175 | 2020-08-19 13:17:19 +0200 | [diff] [blame] | 44 | #include "sysemu/cpu-timers.h" |
Sunil Muthuswamy | faf2079 | 2020-10-28 02:23:19 +0000 | [diff] [blame] | 45 | #include "sysemu/whpx.h" |
Like Xu | 5cc8767 | 2019-05-19 04:54:21 +0800 | [diff] [blame] | 46 | #include "hw/boards.h" |
Markus Armbruster | 650d103 | 2019-08-12 07:23:48 +0200 | [diff] [blame] | 47 | #include "hw/hw.h" |
Daniel P. Berrangé | 8af3f5c | 2021-04-15 14:33:51 +0100 | [diff] [blame] | 48 | #include "trace.h" |
Jan Kiszka | 0ff0fc1 | 2011-06-23 10:15:55 +0200 | [diff] [blame] | 49 | |
Jan Kiszka | 6d9cb73 | 2011-02-01 22:15:58 +0100 | [diff] [blame] | 50 | #ifdef CONFIG_LINUX |
| 51 | |
| 52 | #include <sys/prctl.h> |
| 53 | |
Marcelo Tosatti | c0532a7 | 2010-10-11 15:31:21 -0300 | [diff] [blame] | 54 | #ifndef PR_MCE_KILL |
| 55 | #define PR_MCE_KILL 33 |
| 56 | #endif |
| 57 | |
Jan Kiszka | 6d9cb73 | 2011-02-01 22:15:58 +0100 | [diff] [blame] | 58 | #ifndef PR_MCE_KILL_SET |
| 59 | #define PR_MCE_KILL_SET 1 |
| 60 | #endif |
| 61 | |
| 62 | #ifndef PR_MCE_KILL_EARLY |
| 63 | #define PR_MCE_KILL_EARLY 1 |
| 64 | #endif |
| 65 | |
| 66 | #endif /* CONFIG_LINUX */ |
| 67 | |
Yury Kotov | bd1f7ff | 2019-09-09 16:13:34 +0300 | [diff] [blame] | 68 | static QemuMutex qemu_global_mutex; |
| 69 | |
Philippe Mathieu-Daudé | 5f74af8 | 2022-02-03 12:51:06 +0100 | [diff] [blame] | 70 | /* |
| 71 | * The chosen accelerator is supposed to register this. |
| 72 | */ |
| 73 | static const AccelOpsClass *cpus_accel; |
| 74 | |
Tiejun Chen | 321bc0b | 2013-08-02 09:43:09 +0800 | [diff] [blame] | 75 | bool cpu_is_stopped(CPUState *cpu) |
| 76 | { |
| 77 | return cpu->stopped || !runstate_is_running(); |
| 78 | } |
| 79 | |
Claudio Fontana | 430065d | 2020-07-31 12:23:42 +0200 | [diff] [blame] | 80 | bool cpu_work_list_empty(CPUState *cpu) |
Emilio G. Cota | 0c0fcc2 | 2020-06-12 20:02:24 +0100 | [diff] [blame] | 81 | { |
Idan Horowitz | 25e82fb | 2022-01-14 02:43:57 +0200 | [diff] [blame] | 82 | return QSIMPLEQ_EMPTY_ATOMIC(&cpu->work_list); |
Emilio G. Cota | 0c0fcc2 | 2020-06-12 20:02:24 +0100 | [diff] [blame] | 83 | } |
| 84 | |
Claudio Fontana | 430065d | 2020-07-31 12:23:42 +0200 | [diff] [blame] | 85 | bool cpu_thread_is_idle(CPUState *cpu) |
Peter Maydell | ac873f1 | 2012-07-19 16:52:27 +0100 | [diff] [blame] | 86 | { |
Emilio G. Cota | 0c0fcc2 | 2020-06-12 20:02:24 +0100 | [diff] [blame] | 87 | if (cpu->stop || !cpu_work_list_empty(cpu)) { |
Peter Maydell | ac873f1 | 2012-07-19 16:52:27 +0100 | [diff] [blame] | 88 | return false; |
| 89 | } |
Tiejun Chen | 321bc0b | 2013-08-02 09:43:09 +0800 | [diff] [blame] | 90 | if (cpu_is_stopped(cpu)) { |
Peter Maydell | ac873f1 | 2012-07-19 16:52:27 +0100 | [diff] [blame] | 91 | return true; |
| 92 | } |
Philippe Mathieu-Daudé | ad7d684 | 2022-02-03 01:58:55 +0100 | [diff] [blame] | 93 | if (!cpu->halted || cpu_has_work(cpu)) { |
Peter Maydell | ac873f1 | 2012-07-19 16:52:27 +0100 | [diff] [blame] | 94 | return false; |
| 95 | } |
Philippe Mathieu-Daudé | ad7d684 | 2022-02-03 01:58:55 +0100 | [diff] [blame] | 96 | if (cpus_accel->cpu_thread_is_idle) { |
| 97 | return cpus_accel->cpu_thread_is_idle(cpu); |
| 98 | } |
Peter Maydell | ac873f1 | 2012-07-19 16:52:27 +0100 | [diff] [blame] | 99 | return true; |
| 100 | } |
| 101 | |
Claudio Fontana | 740b175 | 2020-08-19 13:17:19 +0200 | [diff] [blame] | 102 | bool all_cpu_threads_idle(void) |
Peter Maydell | ac873f1 | 2012-07-19 16:52:27 +0100 | [diff] [blame] | 103 | { |
Andreas Färber | 182735e | 2013-05-29 22:29:20 +0200 | [diff] [blame] | 104 | CPUState *cpu; |
Peter Maydell | ac873f1 | 2012-07-19 16:52:27 +0100 | [diff] [blame] | 105 | |
Andreas Färber | bdc4464 | 2013-06-24 23:50:24 +0200 | [diff] [blame] | 106 | CPU_FOREACH(cpu) { |
Andreas Färber | 182735e | 2013-05-29 22:29:20 +0200 | [diff] [blame] | 107 | if (!cpu_thread_is_idle(cpu)) { |
Peter Maydell | ac873f1 | 2012-07-19 16:52:27 +0100 | [diff] [blame] | 108 | return false; |
| 109 | } |
| 110 | } |
| 111 | return true; |
| 112 | } |
| 113 | |
Alex Bennée | 6546706 | 2017-02-23 18:29:09 +0000 | [diff] [blame] | 114 | /***********************************************************/ |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 115 | void hw_error(const char *fmt, ...) |
| 116 | { |
| 117 | va_list ap; |
Andreas Färber | 55e5c28 | 2012-12-17 06:18:02 +0100 | [diff] [blame] | 118 | CPUState *cpu; |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 119 | |
| 120 | va_start(ap, fmt); |
| 121 | fprintf(stderr, "qemu: hardware error: "); |
| 122 | vfprintf(stderr, fmt, ap); |
| 123 | fprintf(stderr, "\n"); |
Andreas Färber | bdc4464 | 2013-06-24 23:50:24 +0200 | [diff] [blame] | 124 | CPU_FOREACH(cpu) { |
Andreas Färber | 55e5c28 | 2012-12-17 06:18:02 +0100 | [diff] [blame] | 125 | fprintf(stderr, "CPU #%d:\n", cpu->cpu_index); |
Markus Armbruster | 90c84c5 | 2019-04-17 21:18:02 +0200 | [diff] [blame] | 126 | cpu_dump_state(cpu, stderr, CPU_DUMP_FPU); |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 127 | } |
| 128 | va_end(ap); |
| 129 | abort(); |
| 130 | } |
| 131 | |
| 132 | void cpu_synchronize_all_states(void) |
| 133 | { |
Andreas Färber | 182735e | 2013-05-29 22:29:20 +0200 | [diff] [blame] | 134 | CPUState *cpu; |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 135 | |
Andreas Färber | bdc4464 | 2013-06-24 23:50:24 +0200 | [diff] [blame] | 136 | CPU_FOREACH(cpu) { |
Andreas Färber | 182735e | 2013-05-29 22:29:20 +0200 | [diff] [blame] | 137 | cpu_synchronize_state(cpu); |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 138 | } |
| 139 | } |
| 140 | |
| 141 | void cpu_synchronize_all_post_reset(void) |
| 142 | { |
Andreas Färber | 182735e | 2013-05-29 22:29:20 +0200 | [diff] [blame] | 143 | CPUState *cpu; |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 144 | |
Andreas Färber | bdc4464 | 2013-06-24 23:50:24 +0200 | [diff] [blame] | 145 | CPU_FOREACH(cpu) { |
Andreas Färber | 182735e | 2013-05-29 22:29:20 +0200 | [diff] [blame] | 146 | cpu_synchronize_post_reset(cpu); |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 147 | } |
| 148 | } |
| 149 | |
| 150 | void cpu_synchronize_all_post_init(void) |
| 151 | { |
Andreas Färber | 182735e | 2013-05-29 22:29:20 +0200 | [diff] [blame] | 152 | CPUState *cpu; |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 153 | |
Andreas Färber | bdc4464 | 2013-06-24 23:50:24 +0200 | [diff] [blame] | 154 | CPU_FOREACH(cpu) { |
Andreas Färber | 182735e | 2013-05-29 22:29:20 +0200 | [diff] [blame] | 155 | cpu_synchronize_post_init(cpu); |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 156 | } |
| 157 | } |
| 158 | |
David Gibson | 75e972d | 2017-05-26 14:46:28 +1000 | [diff] [blame] | 159 | void cpu_synchronize_all_pre_loadvm(void) |
| 160 | { |
| 161 | CPUState *cpu; |
| 162 | |
| 163 | CPU_FOREACH(cpu) { |
| 164 | cpu_synchronize_pre_loadvm(cpu); |
| 165 | } |
| 166 | } |
| 167 | |
Claudio Fontana | 430065d | 2020-07-31 12:23:42 +0200 | [diff] [blame] | 168 | void cpu_synchronize_state(CPUState *cpu) |
| 169 | { |
Claudio Fontana | 994aa17 | 2020-08-19 16:01:03 +0200 | [diff] [blame] | 170 | if (cpus_accel->synchronize_state) { |
Claudio Fontana | 430065d | 2020-07-31 12:23:42 +0200 | [diff] [blame] | 171 | cpus_accel->synchronize_state(cpu); |
| 172 | } |
Claudio Fontana | 430065d | 2020-07-31 12:23:42 +0200 | [diff] [blame] | 173 | } |
| 174 | |
| 175 | void cpu_synchronize_post_reset(CPUState *cpu) |
| 176 | { |
Claudio Fontana | 994aa17 | 2020-08-19 16:01:03 +0200 | [diff] [blame] | 177 | if (cpus_accel->synchronize_post_reset) { |
Claudio Fontana | 430065d | 2020-07-31 12:23:42 +0200 | [diff] [blame] | 178 | cpus_accel->synchronize_post_reset(cpu); |
| 179 | } |
Claudio Fontana | 430065d | 2020-07-31 12:23:42 +0200 | [diff] [blame] | 180 | } |
| 181 | |
| 182 | void cpu_synchronize_post_init(CPUState *cpu) |
| 183 | { |
Claudio Fontana | 994aa17 | 2020-08-19 16:01:03 +0200 | [diff] [blame] | 184 | if (cpus_accel->synchronize_post_init) { |
Claudio Fontana | 430065d | 2020-07-31 12:23:42 +0200 | [diff] [blame] | 185 | cpus_accel->synchronize_post_init(cpu); |
| 186 | } |
Claudio Fontana | 430065d | 2020-07-31 12:23:42 +0200 | [diff] [blame] | 187 | } |
| 188 | |
| 189 | void cpu_synchronize_pre_loadvm(CPUState *cpu) |
| 190 | { |
Claudio Fontana | 994aa17 | 2020-08-19 16:01:03 +0200 | [diff] [blame] | 191 | if (cpus_accel->synchronize_pre_loadvm) { |
Claudio Fontana | 430065d | 2020-07-31 12:23:42 +0200 | [diff] [blame] | 192 | cpus_accel->synchronize_pre_loadvm(cpu); |
| 193 | } |
Claudio Fontana | 430065d | 2020-07-31 12:23:42 +0200 | [diff] [blame] | 194 | } |
| 195 | |
Tom Lendacky | 92a5199 | 2021-01-26 11:36:47 -0600 | [diff] [blame] | 196 | bool cpus_are_resettable(void) |
| 197 | { |
Philippe Mathieu-Daudé | 3919635 | 2022-02-03 02:03:57 +0100 | [diff] [blame] | 198 | if (cpus_accel->cpus_are_resettable) { |
| 199 | return cpus_accel->cpus_are_resettable(); |
| 200 | } |
| 201 | return true; |
Tom Lendacky | 92a5199 | 2021-01-26 11:36:47 -0600 | [diff] [blame] | 202 | } |
| 203 | |
Claudio Fontana | 430065d | 2020-07-31 12:23:42 +0200 | [diff] [blame] | 204 | int64_t cpus_get_virtual_clock(void) |
| 205 | { |
Claudio Fontana | 994aa17 | 2020-08-19 16:01:03 +0200 | [diff] [blame] | 206 | /* |
| 207 | * XXX |
| 208 | * |
| 209 | * need to check that cpus_accel is not NULL, because qcow2 calls |
| 210 | * qemu_get_clock_ns(CLOCK_VIRTUAL) without any accel initialized and |
| 211 | * with ticks disabled in some io-tests: |
| 212 | * 030 040 041 060 099 120 127 140 156 161 172 181 191 192 195 203 229 249 256 267 |
| 213 | * |
| 214 | * is this expected? |
| 215 | * |
| 216 | * XXX |
| 217 | */ |
Claudio Fontana | 430065d | 2020-07-31 12:23:42 +0200 | [diff] [blame] | 218 | if (cpus_accel && cpus_accel->get_virtual_clock) { |
| 219 | return cpus_accel->get_virtual_clock(); |
| 220 | } |
Claudio Fontana | 430065d | 2020-07-31 12:23:42 +0200 | [diff] [blame] | 221 | return cpu_get_clock(); |
| 222 | } |
| 223 | |
| 224 | /* |
| 225 | * return the time elapsed in VM between vm_start and vm_stop. Unless |
| 226 | * icount is active, cpus_get_elapsed_ticks() uses units of the host CPU cycle |
| 227 | * counter. |
| 228 | */ |
| 229 | int64_t cpus_get_elapsed_ticks(void) |
| 230 | { |
Claudio Fontana | 994aa17 | 2020-08-19 16:01:03 +0200 | [diff] [blame] | 231 | if (cpus_accel->get_elapsed_ticks) { |
Claudio Fontana | 430065d | 2020-07-31 12:23:42 +0200 | [diff] [blame] | 232 | return cpus_accel->get_elapsed_ticks(); |
| 233 | } |
Claudio Fontana | 430065d | 2020-07-31 12:23:42 +0200 | [diff] [blame] | 234 | return cpu_get_ticks(); |
| 235 | } |
| 236 | |
Claudio Fontana | bb4776b | 2020-08-11 15:16:33 +0200 | [diff] [blame] | 237 | static void generic_handle_interrupt(CPUState *cpu, int mask) |
| 238 | { |
| 239 | cpu->interrupt_request |= mask; |
| 240 | |
| 241 | if (!qemu_cpu_is_self(cpu)) { |
| 242 | qemu_cpu_kick(cpu); |
| 243 | } |
| 244 | } |
| 245 | |
| 246 | void cpu_interrupt(CPUState *cpu, int mask) |
| 247 | { |
| 248 | if (cpus_accel->handle_interrupt) { |
| 249 | cpus_accel->handle_interrupt(cpu, mask); |
| 250 | } else { |
| 251 | generic_handle_interrupt(cpu, mask); |
| 252 | } |
| 253 | } |
| 254 | |
Stefan Hajnoczi | 4486e89 | 2018-03-07 14:42:05 +0000 | [diff] [blame] | 255 | static int do_vm_stop(RunState state, bool send_stop) |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 256 | { |
Kevin Wolf | 5698346 | 2013-07-05 13:49:54 +0200 | [diff] [blame] | 257 | int ret = 0; |
| 258 | |
Luiz Capitulino | 1354869 | 2011-07-29 15:36:43 -0300 | [diff] [blame] | 259 | if (runstate_is_running()) { |
Longpeng | f962cac | 2020-03-16 16:37:32 +0800 | [diff] [blame] | 260 | runstate_set(state); |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 261 | cpu_disable_ticks(); |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 262 | pause_all_vcpus(); |
Luiz Capitulino | 1dfb4dd | 2011-07-29 14:26:33 -0300 | [diff] [blame] | 263 | vm_state_notify(0, state); |
Stefan Hajnoczi | 4486e89 | 2018-03-07 14:42:05 +0000 | [diff] [blame] | 264 | if (send_stop) { |
Peter Xu | 3ab7238 | 2018-08-15 21:37:37 +0800 | [diff] [blame] | 265 | qapi_event_send_stop(); |
Stefan Hajnoczi | 4486e89 | 2018-03-07 14:42:05 +0000 | [diff] [blame] | 266 | } |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 267 | } |
Kevin Wolf | 5698346 | 2013-07-05 13:49:54 +0200 | [diff] [blame] | 268 | |
Kevin Wolf | 594a45c | 2013-07-18 14:52:19 +0200 | [diff] [blame] | 269 | bdrv_drain_all(); |
John Snow | 22af08e | 2016-09-22 21:45:51 -0400 | [diff] [blame] | 270 | ret = bdrv_flush_all(); |
Daniel P. Berrangé | 8af3f5c | 2021-04-15 14:33:51 +0100 | [diff] [blame] | 271 | trace_vm_stop_flush_all(ret); |
Kevin Wolf | 594a45c | 2013-07-18 14:52:19 +0200 | [diff] [blame] | 272 | |
Kevin Wolf | 5698346 | 2013-07-05 13:49:54 +0200 | [diff] [blame] | 273 | return ret; |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 274 | } |
| 275 | |
Stefan Hajnoczi | 4486e89 | 2018-03-07 14:42:05 +0000 | [diff] [blame] | 276 | /* Special vm_stop() variant for terminating the process. Historically clients |
| 277 | * did not expect a QMP STOP event and so we need to retain compatibility. |
| 278 | */ |
| 279 | int vm_shutdown(void) |
| 280 | { |
| 281 | return do_vm_stop(RUN_STATE_SHUTDOWN, false); |
| 282 | } |
| 283 | |
Claudio Fontana | 430065d | 2020-07-31 12:23:42 +0200 | [diff] [blame] | 284 | bool cpu_can_run(CPUState *cpu) |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 285 | { |
Andreas Färber | 4fdeee7 | 2012-05-02 23:10:09 +0200 | [diff] [blame] | 286 | if (cpu->stop) { |
Andreas Färber | a1fcaa7 | 2012-05-02 23:42:26 +0200 | [diff] [blame] | 287 | return false; |
Jan Kiszka | 0ab07c6 | 2011-02-07 12:19:14 +0100 | [diff] [blame] | 288 | } |
Tiejun Chen | 321bc0b | 2013-08-02 09:43:09 +0800 | [diff] [blame] | 289 | if (cpu_is_stopped(cpu)) { |
Andreas Färber | a1fcaa7 | 2012-05-02 23:42:26 +0200 | [diff] [blame] | 290 | return false; |
Jan Kiszka | 0ab07c6 | 2011-02-07 12:19:14 +0100 | [diff] [blame] | 291 | } |
Andreas Färber | a1fcaa7 | 2012-05-02 23:42:26 +0200 | [diff] [blame] | 292 | return true; |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 293 | } |
| 294 | |
Claudio Fontana | 430065d | 2020-07-31 12:23:42 +0200 | [diff] [blame] | 295 | void cpu_handle_guest_debug(CPUState *cpu) |
Jan Kiszka | 3c638d0 | 2010-06-25 16:56:56 +0200 | [diff] [blame] | 296 | { |
Pavel Dovgalyuk | fda8458 | 2020-10-03 20:13:43 +0300 | [diff] [blame] | 297 | if (replay_running_debug()) { |
| 298 | if (!cpu->singlestep_enabled) { |
Pavel Dovgalyuk | cda3825 | 2020-10-03 20:13:49 +0300 | [diff] [blame] | 299 | /* |
| 300 | * Report about the breakpoint and |
| 301 | * make a single step to skip it |
| 302 | */ |
| 303 | replay_breakpoint(); |
Pavel Dovgalyuk | fda8458 | 2020-10-03 20:13:43 +0300 | [diff] [blame] | 304 | cpu_single_step(cpu, SSTEP_ENABLE); |
| 305 | } else { |
| 306 | cpu_single_step(cpu, 0); |
| 307 | } |
| 308 | } else { |
| 309 | gdb_set_stop_cpu(cpu); |
| 310 | qemu_system_debug_request(); |
| 311 | cpu->stopped = true; |
| 312 | } |
Jan Kiszka | 3c638d0 | 2010-06-25 16:56:56 +0200 | [diff] [blame] | 313 | } |
| 314 | |
Jan Kiszka | 6d9cb73 | 2011-02-01 22:15:58 +0100 | [diff] [blame] | 315 | #ifdef CONFIG_LINUX |
| 316 | static void sigbus_reraise(void) |
| 317 | { |
| 318 | sigset_t set; |
| 319 | struct sigaction action; |
| 320 | |
| 321 | memset(&action, 0, sizeof(action)); |
| 322 | action.sa_handler = SIG_DFL; |
| 323 | if (!sigaction(SIGBUS, &action, NULL)) { |
| 324 | raise(SIGBUS); |
| 325 | sigemptyset(&set); |
| 326 | sigaddset(&set, SIGBUS); |
Peter Maydell | a2d1761 | 2016-05-16 18:33:59 +0100 | [diff] [blame] | 327 | pthread_sigmask(SIG_UNBLOCK, &set, NULL); |
Jan Kiszka | 6d9cb73 | 2011-02-01 22:15:58 +0100 | [diff] [blame] | 328 | } |
Li Zhijian | eb1960a | 2021-07-06 17:44:33 +0800 | [diff] [blame] | 329 | perror("Failed to re-raise SIGBUS!"); |
Jan Kiszka | 6d9cb73 | 2011-02-01 22:15:58 +0100 | [diff] [blame] | 330 | abort(); |
| 331 | } |
| 332 | |
Paolo Bonzini | d98d407 | 2017-02-08 13:22:12 +0100 | [diff] [blame] | 333 | static void sigbus_handler(int n, siginfo_t *siginfo, void *ctx) |
Jan Kiszka | 6d9cb73 | 2011-02-01 22:15:58 +0100 | [diff] [blame] | 334 | { |
Paolo Bonzini | a16fc07 | 2017-02-09 09:50:02 +0100 | [diff] [blame] | 335 | if (siginfo->si_code != BUS_MCEERR_AO && siginfo->si_code != BUS_MCEERR_AR) { |
| 336 | sigbus_reraise(); |
| 337 | } |
| 338 | |
Paolo Bonzini | 2ae41db | 2017-02-08 12:48:54 +0100 | [diff] [blame] | 339 | if (current_cpu) { |
| 340 | /* Called asynchronously in VCPU thread. */ |
| 341 | if (kvm_on_sigbus_vcpu(current_cpu, siginfo->si_code, siginfo->si_addr)) { |
| 342 | sigbus_reraise(); |
| 343 | } |
| 344 | } else { |
| 345 | /* Called synchronously (via signalfd) in main thread. */ |
| 346 | if (kvm_on_sigbus(siginfo->si_code, siginfo->si_addr)) { |
| 347 | sigbus_reraise(); |
| 348 | } |
Jan Kiszka | 6d9cb73 | 2011-02-01 22:15:58 +0100 | [diff] [blame] | 349 | } |
| 350 | } |
| 351 | |
| 352 | static void qemu_init_sigbus(void) |
| 353 | { |
| 354 | struct sigaction action; |
| 355 | |
David Hildenbrand | 29b838c | 2021-12-17 14:46:10 +0100 | [diff] [blame] | 356 | /* |
| 357 | * ALERT: when modifying this, take care that SIGBUS forwarding in |
David Hildenbrand | 6556aad | 2022-10-14 15:47:14 +0200 | [diff] [blame] | 358 | * qemu_prealloc_mem() will continue working as expected. |
David Hildenbrand | 29b838c | 2021-12-17 14:46:10 +0100 | [diff] [blame] | 359 | */ |
Jan Kiszka | 6d9cb73 | 2011-02-01 22:15:58 +0100 | [diff] [blame] | 360 | memset(&action, 0, sizeof(action)); |
| 361 | action.sa_flags = SA_SIGINFO; |
Paolo Bonzini | d98d407 | 2017-02-08 13:22:12 +0100 | [diff] [blame] | 362 | action.sa_sigaction = sigbus_handler; |
Jan Kiszka | 6d9cb73 | 2011-02-01 22:15:58 +0100 | [diff] [blame] | 363 | sigaction(SIGBUS, &action, NULL); |
| 364 | |
| 365 | prctl(PR_MCE_KILL, PR_MCE_KILL_SET, PR_MCE_KILL_EARLY, 0, 0); |
| 366 | } |
Paolo Bonzini | a16fc07 | 2017-02-09 09:50:02 +0100 | [diff] [blame] | 367 | #else /* !CONFIG_LINUX */ |
| 368 | static void qemu_init_sigbus(void) |
| 369 | { |
| 370 | } |
Paolo Bonzini | a16fc07 | 2017-02-09 09:50:02 +0100 | [diff] [blame] | 371 | #endif /* !CONFIG_LINUX */ |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 372 | |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 373 | static QemuThread io_thread; |
| 374 | |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 375 | /* cpu creation */ |
| 376 | static QemuCond qemu_cpu_cond; |
| 377 | /* system init */ |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 378 | static QemuCond qemu_pause_cond; |
| 379 | |
Paolo Bonzini | d3b12f5 | 2011-09-13 10:30:52 +0200 | [diff] [blame] | 380 | void qemu_init_cpu_loop(void) |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 381 | { |
Jan Kiszka | 6d9cb73 | 2011-02-01 22:15:58 +0100 | [diff] [blame] | 382 | qemu_init_sigbus(); |
Anthony Liguori | ed94592 | 2011-02-08 18:18:18 +0100 | [diff] [blame] | 383 | qemu_cond_init(&qemu_cpu_cond); |
Anthony Liguori | ed94592 | 2011-02-08 18:18:18 +0100 | [diff] [blame] | 384 | qemu_cond_init(&qemu_pause_cond); |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 385 | qemu_mutex_init(&qemu_global_mutex); |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 386 | |
Jan Kiszka | b7680cb | 2011-03-12 17:43:51 +0100 | [diff] [blame] | 387 | qemu_thread_get_self(&io_thread); |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 388 | } |
| 389 | |
Paolo Bonzini | 14e6fe1 | 2016-10-31 10:36:08 +0100 | [diff] [blame] | 390 | void run_on_cpu(CPUState *cpu, run_on_cpu_func func, run_on_cpu_data data) |
Marcelo Tosatti | e82bcec | 2010-05-04 09:45:22 -0300 | [diff] [blame] | 391 | { |
Sergey Fedorov | d148d90 | 2016-08-29 09:51:00 +0200 | [diff] [blame] | 392 | do_run_on_cpu(cpu, func, data, &qemu_global_mutex); |
Chegu Vinod | 3c02270 | 2013-06-24 03:49:41 -0600 | [diff] [blame] | 393 | } |
| 394 | |
David Hildenbrand | ebd05fe | 2017-11-29 20:12:15 +0100 | [diff] [blame] | 395 | static void qemu_cpu_stop(CPUState *cpu, bool exit) |
| 396 | { |
| 397 | g_assert(qemu_cpu_is_self(cpu)); |
| 398 | cpu->stop = false; |
| 399 | cpu->stopped = true; |
| 400 | if (exit) { |
| 401 | cpu_exit(cpu); |
| 402 | } |
| 403 | qemu_cond_broadcast(&qemu_pause_cond); |
| 404 | } |
| 405 | |
Claudio Fontana | 430065d | 2020-07-31 12:23:42 +0200 | [diff] [blame] | 406 | void qemu_wait_io_event_common(CPUState *cpu) |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 407 | { |
Paolo Bonzini | 0683100 | 2023-03-03 14:37:51 +0100 | [diff] [blame] | 408 | qatomic_set_mb(&cpu->thread_kicked, false); |
Andreas Färber | 4fdeee7 | 2012-05-02 23:10:09 +0200 | [diff] [blame] | 409 | if (cpu->stop) { |
David Hildenbrand | ebd05fe | 2017-11-29 20:12:15 +0100 | [diff] [blame] | 410 | qemu_cpu_stop(cpu, false); |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 411 | } |
Sergey Fedorov | a5403c6 | 2016-08-02 18:27:36 +0100 | [diff] [blame] | 412 | process_queued_cpu_work(cpu); |
Alex Bennée | 3725794 | 2017-02-23 18:29:14 +0000 | [diff] [blame] | 413 | } |
| 414 | |
Claudio Fontana | 430065d | 2020-07-31 12:23:42 +0200 | [diff] [blame] | 415 | void qemu_wait_io_event(CPUState *cpu) |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 416 | { |
Emilio G. Cota | 30865f3 | 2018-10-21 13:30:35 -0400 | [diff] [blame] | 417 | bool slept = false; |
| 418 | |
Andreas Färber | a98ae1d | 2013-05-26 23:21:08 +0200 | [diff] [blame] | 419 | while (cpu_thread_is_idle(cpu)) { |
Emilio G. Cota | 30865f3 | 2018-10-21 13:30:35 -0400 | [diff] [blame] | 420 | if (!slept) { |
| 421 | slept = true; |
| 422 | qemu_plugin_vcpu_idle_cb(cpu); |
| 423 | } |
Andreas Färber | f5c121b | 2012-05-03 01:22:49 +0200 | [diff] [blame] | 424 | qemu_cond_wait(cpu->halt_cond, &qemu_global_mutex); |
Jan Kiszka | 1640032 | 2011-02-09 16:29:37 +0100 | [diff] [blame] | 425 | } |
Emilio G. Cota | 30865f3 | 2018-10-21 13:30:35 -0400 | [diff] [blame] | 426 | if (slept) { |
| 427 | qemu_plugin_vcpu_resume_cb(cpu); |
| 428 | } |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 429 | |
Sergio Andres Gomez Del Real | c97d6d2 | 2017-09-13 04:05:09 -0500 | [diff] [blame] | 430 | qemu_wait_io_event_common(cpu); |
| 431 | } |
| 432 | |
Claudio Fontana | 430065d | 2020-07-31 12:23:42 +0200 | [diff] [blame] | 433 | void cpus_kick_thread(CPUState *cpu) |
Paolo Bonzini | cc015e9 | 2011-03-12 17:44:08 +0100 | [diff] [blame] | 434 | { |
Paolo Bonzini | e0c3821 | 2015-08-26 00:19:19 +0200 | [diff] [blame] | 435 | if (cpu->thread_kicked) { |
| 436 | return; |
Paolo Bonzini | 9102ded | 2015-08-18 06:52:09 -0700 | [diff] [blame] | 437 | } |
Paolo Bonzini | e0c3821 | 2015-08-26 00:19:19 +0200 | [diff] [blame] | 438 | cpu->thread_kicked = true; |
Xuzhou Cheng | c992355 | 2022-10-28 12:57:26 +0800 | [diff] [blame] | 439 | |
| 440 | #ifndef _WIN32 |
| 441 | int err = pthread_kill(cpu->thread->thread, SIG_IPI); |
Laurent Vivier | d455ebc | 2019-01-02 15:16:03 +0100 | [diff] [blame] | 442 | if (err && err != ESRCH) { |
Paolo Bonzini | cc015e9 | 2011-03-12 17:44:08 +0100 | [diff] [blame] | 443 | fprintf(stderr, "qemu:%s: %s", __func__, strerror(err)); |
| 444 | exit(1); |
| 445 | } |
Xuzhou Cheng | c992355 | 2022-10-28 12:57:26 +0800 | [diff] [blame] | 446 | #else |
| 447 | qemu_sem_post(&cpu->sem); |
Paolo Bonzini | cc015e9 | 2011-03-12 17:44:08 +0100 | [diff] [blame] | 448 | #endif |
| 449 | } |
| 450 | |
Andreas Färber | c08d742 | 2012-05-03 04:34:15 +0200 | [diff] [blame] | 451 | void qemu_cpu_kick(CPUState *cpu) |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 452 | { |
Andreas Färber | f5c121b | 2012-05-03 01:22:49 +0200 | [diff] [blame] | 453 | qemu_cond_broadcast(cpu->halt_cond); |
Claudio Fontana | 994aa17 | 2020-08-19 16:01:03 +0200 | [diff] [blame] | 454 | if (cpus_accel->kick_vcpu_thread) { |
Claudio Fontana | 430065d | 2020-07-31 12:23:42 +0200 | [diff] [blame] | 455 | cpus_accel->kick_vcpu_thread(cpu); |
Claudio Fontana | e92558e | 2020-07-07 11:18:49 +0200 | [diff] [blame] | 456 | } else { /* default */ |
Claudio Fontana | 430065d | 2020-07-31 12:23:42 +0200 | [diff] [blame] | 457 | cpus_kick_thread(cpu); |
Paolo Bonzini | e0c3821 | 2015-08-26 00:19:19 +0200 | [diff] [blame] | 458 | } |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 459 | } |
| 460 | |
Jan Kiszka | 46d62fa | 2011-02-01 22:15:59 +0100 | [diff] [blame] | 461 | void qemu_cpu_kick_self(void) |
| 462 | { |
Andreas Färber | 4917cf4 | 2013-05-27 05:17:50 +0200 | [diff] [blame] | 463 | assert(current_cpu); |
Claudio Fontana | 430065d | 2020-07-31 12:23:42 +0200 | [diff] [blame] | 464 | cpus_kick_thread(current_cpu); |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 465 | } |
| 466 | |
Andreas Färber | 60e8257 | 2012-05-02 22:23:49 +0200 | [diff] [blame] | 467 | bool qemu_cpu_is_self(CPUState *cpu) |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 468 | { |
Andreas Färber | 814e612 | 2012-05-02 17:00:37 +0200 | [diff] [blame] | 469 | return qemu_thread_is_self(cpu->thread); |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 470 | } |
| 471 | |
Paolo Bonzini | 79e2b9a | 2015-01-21 12:09:14 +0100 | [diff] [blame] | 472 | bool qemu_in_vcpu_thread(void) |
Juan Quintela | aa723c2 | 2012-09-18 16:30:11 +0200 | [diff] [blame] | 473 | { |
Andreas Färber | 4917cf4 | 2013-05-27 05:17:50 +0200 | [diff] [blame] | 474 | return current_cpu && qemu_cpu_is_self(current_cpu); |
Juan Quintela | aa723c2 | 2012-09-18 16:30:11 +0200 | [diff] [blame] | 475 | } |
| 476 | |
Stefan Hajnoczi | d5d2b15 | 2022-02-22 14:01:50 +0000 | [diff] [blame] | 477 | QEMU_DEFINE_STATIC_CO_TLS(bool, iothread_locked) |
Paolo Bonzini | afbe705 | 2015-06-18 18:47:19 +0200 | [diff] [blame] | 478 | |
| 479 | bool qemu_mutex_iothread_locked(void) |
| 480 | { |
Stefan Hajnoczi | d5d2b15 | 2022-02-22 14:01:50 +0000 | [diff] [blame] | 481 | return get_iothread_locked(); |
Paolo Bonzini | afbe705 | 2015-06-18 18:47:19 +0200 | [diff] [blame] | 482 | } |
| 483 | |
Emanuele Giuseppe Esposito | 6538692 | 2022-03-03 10:15:46 -0500 | [diff] [blame] | 484 | bool qemu_in_main_thread(void) |
| 485 | { |
| 486 | return qemu_mutex_iothread_locked(); |
| 487 | } |
| 488 | |
Emilio G. Cota | cb764d0 | 2017-10-28 02:16:41 -0400 | [diff] [blame] | 489 | /* |
| 490 | * The BQL is taken from so many places that it is worth profiling the |
| 491 | * callers directly, instead of funneling them all through a single function. |
| 492 | */ |
| 493 | void qemu_mutex_lock_iothread_impl(const char *file, int line) |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 494 | { |
Stefan Hajnoczi | d73415a | 2020-09-23 11:56:46 +0100 | [diff] [blame] | 495 | QemuMutexLockFunc bql_lock = qatomic_read(&qemu_bql_mutex_lock_func); |
Emilio G. Cota | cb764d0 | 2017-10-28 02:16:41 -0400 | [diff] [blame] | 496 | |
Jan Kiszka | 8d04fb5 | 2017-02-23 18:29:11 +0000 | [diff] [blame] | 497 | g_assert(!qemu_mutex_iothread_locked()); |
Emilio G. Cota | cb764d0 | 2017-10-28 02:16:41 -0400 | [diff] [blame] | 498 | bql_lock(&qemu_global_mutex, file, line); |
Stefan Hajnoczi | d5d2b15 | 2022-02-22 14:01:50 +0000 | [diff] [blame] | 499 | set_iothread_locked(true); |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 500 | } |
| 501 | |
| 502 | void qemu_mutex_unlock_iothread(void) |
| 503 | { |
Jan Kiszka | 8d04fb5 | 2017-02-23 18:29:11 +0000 | [diff] [blame] | 504 | g_assert(qemu_mutex_iothread_locked()); |
Stefan Hajnoczi | d5d2b15 | 2022-02-22 14:01:50 +0000 | [diff] [blame] | 505 | set_iothread_locked(false); |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 506 | qemu_mutex_unlock(&qemu_global_mutex); |
| 507 | } |
| 508 | |
Aravinda Prasad | 19e067e | 2020-01-31 00:14:17 +0530 | [diff] [blame] | 509 | void qemu_cond_wait_iothread(QemuCond *cond) |
| 510 | { |
| 511 | qemu_cond_wait(cond, &qemu_global_mutex); |
| 512 | } |
| 513 | |
Claudio Fontana | b0c3cf9 | 2020-06-29 11:35:03 +0200 | [diff] [blame] | 514 | void qemu_cond_timedwait_iothread(QemuCond *cond, int ms) |
| 515 | { |
| 516 | qemu_cond_timedwait(cond, &qemu_global_mutex, ms); |
| 517 | } |
| 518 | |
Claudio Fontana | 430065d | 2020-07-31 12:23:42 +0200 | [diff] [blame] | 519 | /* signal CPU creation */ |
| 520 | void cpu_thread_signal_created(CPUState *cpu) |
| 521 | { |
| 522 | cpu->created = true; |
| 523 | qemu_cond_signal(&qemu_cpu_cond); |
| 524 | } |
| 525 | |
| 526 | /* signal CPU destruction */ |
| 527 | void cpu_thread_signal_destroyed(CPUState *cpu) |
| 528 | { |
| 529 | cpu->created = false; |
| 530 | qemu_cond_signal(&qemu_cpu_cond); |
| 531 | } |
| 532 | |
| 533 | |
Alex Bennée | e8faee0 | 2016-10-27 16:09:58 +0100 | [diff] [blame] | 534 | static bool all_vcpus_paused(void) |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 535 | { |
Andreas Färber | bdc4464 | 2013-06-24 23:50:24 +0200 | [diff] [blame] | 536 | CPUState *cpu; |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 537 | |
Andreas Färber | bdc4464 | 2013-06-24 23:50:24 +0200 | [diff] [blame] | 538 | CPU_FOREACH(cpu) { |
Andreas Färber | 182735e | 2013-05-29 22:29:20 +0200 | [diff] [blame] | 539 | if (!cpu->stopped) { |
Alex Bennée | e8faee0 | 2016-10-27 16:09:58 +0100 | [diff] [blame] | 540 | return false; |
Jan Kiszka | 0ab07c6 | 2011-02-07 12:19:14 +0100 | [diff] [blame] | 541 | } |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 542 | } |
| 543 | |
Alex Bennée | e8faee0 | 2016-10-27 16:09:58 +0100 | [diff] [blame] | 544 | return true; |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 545 | } |
| 546 | |
| 547 | void pause_all_vcpus(void) |
| 548 | { |
Andreas Färber | bdc4464 | 2013-06-24 23:50:24 +0200 | [diff] [blame] | 549 | CPUState *cpu; |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 550 | |
Alex Bligh | 40daca5 | 2013-08-21 16:03:02 +0100 | [diff] [blame] | 551 | qemu_clock_enable(QEMU_CLOCK_VIRTUAL, false); |
Andreas Färber | bdc4464 | 2013-06-24 23:50:24 +0200 | [diff] [blame] | 552 | CPU_FOREACH(cpu) { |
David Hildenbrand | ebd05fe | 2017-11-29 20:12:15 +0100 | [diff] [blame] | 553 | if (qemu_cpu_is_self(cpu)) { |
| 554 | qemu_cpu_stop(cpu, true); |
| 555 | } else { |
| 556 | cpu->stop = true; |
| 557 | qemu_cpu_kick(cpu); |
| 558 | } |
Jan Kiszka | d798e97 | 2012-02-17 18:31:16 +0100 | [diff] [blame] | 559 | } |
| 560 | |
Alex Bennée | d759c95 | 2018-02-27 12:52:48 +0300 | [diff] [blame] | 561 | /* We need to drop the replay_lock so any vCPU threads woken up |
| 562 | * can finish their replay tasks |
| 563 | */ |
| 564 | replay_mutex_unlock(); |
| 565 | |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 566 | while (!all_vcpus_paused()) { |
Paolo Bonzini | be7d6c5 | 2011-03-12 17:44:02 +0100 | [diff] [blame] | 567 | qemu_cond_wait(&qemu_pause_cond, &qemu_global_mutex); |
Andreas Färber | bdc4464 | 2013-06-24 23:50:24 +0200 | [diff] [blame] | 568 | CPU_FOREACH(cpu) { |
Andreas Färber | 182735e | 2013-05-29 22:29:20 +0200 | [diff] [blame] | 569 | qemu_cpu_kick(cpu); |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 570 | } |
| 571 | } |
Alex Bennée | d759c95 | 2018-02-27 12:52:48 +0300 | [diff] [blame] | 572 | |
| 573 | qemu_mutex_unlock_iothread(); |
| 574 | replay_mutex_lock(); |
| 575 | qemu_mutex_lock_iothread(); |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 576 | } |
| 577 | |
Igor Mammedov | 2993683 | 2013-04-23 10:29:37 +0200 | [diff] [blame] | 578 | void cpu_resume(CPUState *cpu) |
| 579 | { |
| 580 | cpu->stop = false; |
| 581 | cpu->stopped = false; |
| 582 | qemu_cpu_kick(cpu); |
| 583 | } |
| 584 | |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 585 | void resume_all_vcpus(void) |
| 586 | { |
Andreas Färber | bdc4464 | 2013-06-24 23:50:24 +0200 | [diff] [blame] | 587 | CPUState *cpu; |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 588 | |
Longpeng | f962cac | 2020-03-16 16:37:32 +0800 | [diff] [blame] | 589 | if (!runstate_is_running()) { |
| 590 | return; |
| 591 | } |
| 592 | |
Alex Bligh | 40daca5 | 2013-08-21 16:03:02 +0100 | [diff] [blame] | 593 | qemu_clock_enable(QEMU_CLOCK_VIRTUAL, true); |
Andreas Färber | bdc4464 | 2013-06-24 23:50:24 +0200 | [diff] [blame] | 594 | CPU_FOREACH(cpu) { |
Andreas Färber | 182735e | 2013-05-29 22:29:20 +0200 | [diff] [blame] | 595 | cpu_resume(cpu); |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 596 | } |
| 597 | } |
| 598 | |
Paolo Bonzini | dbadee4 | 2018-01-30 16:40:12 +0100 | [diff] [blame] | 599 | void cpu_remove_sync(CPUState *cpu) |
Gu Zheng | 4c055ab | 2016-05-12 09:18:13 +0530 | [diff] [blame] | 600 | { |
| 601 | cpu->stop = true; |
| 602 | cpu->unplug = true; |
| 603 | qemu_cpu_kick(cpu); |
Paolo Bonzini | dbadee4 | 2018-01-30 16:40:12 +0100 | [diff] [blame] | 604 | qemu_mutex_unlock_iothread(); |
| 605 | qemu_thread_join(cpu->thread); |
| 606 | qemu_mutex_lock_iothread(); |
Bharata B Rao | 2c57904 | 2016-05-12 09:18:14 +0530 | [diff] [blame] | 607 | } |
| 608 | |
Claudio Fontana | b86f59c | 2021-02-04 17:39:25 +0100 | [diff] [blame] | 609 | void cpus_register_accel(const AccelOpsClass *ops) |
Claudio Fontana | 430065d | 2020-07-31 12:23:42 +0200 | [diff] [blame] | 610 | { |
Claudio Fontana | b86f59c | 2021-02-04 17:39:25 +0100 | [diff] [blame] | 611 | assert(ops != NULL); |
| 612 | assert(ops->create_vcpu_thread != NULL); /* mandatory */ |
| 613 | cpus_accel = ops; |
Claudio Fontana | 430065d | 2020-07-31 12:23:42 +0200 | [diff] [blame] | 614 | } |
| 615 | |
Alex Bennée | ae7467b | 2022-09-29 12:42:24 +0100 | [diff] [blame] | 616 | const AccelOpsClass *cpus_get_accel(void) |
| 617 | { |
| 618 | /* broken if we call this early */ |
| 619 | assert(cpus_accel); |
| 620 | return cpus_accel; |
| 621 | } |
| 622 | |
Andreas Färber | c643bed | 2013-05-27 03:23:24 +0200 | [diff] [blame] | 623 | void qemu_init_vcpu(CPUState *cpu) |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 624 | { |
Like Xu | 5cc8767 | 2019-05-19 04:54:21 +0800 | [diff] [blame] | 625 | MachineState *ms = MACHINE(qdev_get_machine()); |
| 626 | |
| 627 | cpu->nr_cores = ms->smp.cores; |
| 628 | cpu->nr_threads = ms->smp.threads; |
Andreas Färber | f324e76 | 2012-05-02 23:26:21 +0200 | [diff] [blame] | 629 | cpu->stopped = true; |
Richard Henderson | 9c09a25 | 2019-03-14 13:06:29 -0700 | [diff] [blame] | 630 | cpu->random_seed = qemu_guest_random_seed_thread_part1(); |
Peter Maydell | 56943e8 | 2016-01-21 14:15:04 +0000 | [diff] [blame] | 631 | |
| 632 | if (!cpu->as) { |
| 633 | /* If the target cpu hasn't set up any address spaces itself, |
| 634 | * give it the default one. |
| 635 | */ |
Peter Maydell | 12ebc9a | 2016-01-21 14:15:04 +0000 | [diff] [blame] | 636 | cpu->num_ases = 1; |
Peter Xu | 80ceb07 | 2017-11-23 17:23:32 +0800 | [diff] [blame] | 637 | cpu_address_space_init(cpu, 0, "cpu-memory", cpu->memory); |
Peter Maydell | 56943e8 | 2016-01-21 14:15:04 +0000 | [diff] [blame] | 638 | } |
| 639 | |
Claudio Fontana | b86f59c | 2021-02-04 17:39:25 +0100 | [diff] [blame] | 640 | /* accelerators all implement the AccelOpsClass */ |
Claudio Fontana | 994aa17 | 2020-08-19 16:01:03 +0200 | [diff] [blame] | 641 | g_assert(cpus_accel != NULL && cpus_accel->create_vcpu_thread != NULL); |
| 642 | cpus_accel->create_vcpu_thread(cpu); |
David Hildenbrand | 81e9631 | 2018-02-09 20:52:38 +0100 | [diff] [blame] | 643 | |
| 644 | while (!cpu->created) { |
| 645 | qemu_cond_wait(&qemu_cpu_cond, &qemu_global_mutex); |
| 646 | } |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 647 | } |
| 648 | |
Jan Kiszka | b4a3d96 | 2011-02-01 22:15:43 +0100 | [diff] [blame] | 649 | void cpu_stop_current(void) |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 650 | { |
Andreas Färber | 4917cf4 | 2013-05-27 05:17:50 +0200 | [diff] [blame] | 651 | if (current_cpu) { |
Peter Maydell | 0ec7e67 | 2019-01-07 15:23:47 +0000 | [diff] [blame] | 652 | current_cpu->stop = true; |
| 653 | cpu_exit(current_cpu); |
Jan Kiszka | b4a3d96 | 2011-02-01 22:15:43 +0100 | [diff] [blame] | 654 | } |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 655 | } |
| 656 | |
Kevin Wolf | 5698346 | 2013-07-05 13:49:54 +0200 | [diff] [blame] | 657 | int vm_stop(RunState state) |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 658 | { |
Juan Quintela | aa723c2 | 2012-09-18 16:30:11 +0200 | [diff] [blame] | 659 | if (qemu_in_vcpu_thread()) { |
Paolo Bonzini | 74892d2 | 2014-06-05 14:53:58 +0200 | [diff] [blame] | 660 | qemu_system_vmstop_request_prepare(); |
Luiz Capitulino | 1dfb4dd | 2011-07-29 14:26:33 -0300 | [diff] [blame] | 661 | qemu_system_vmstop_request(state); |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 662 | /* |
| 663 | * FIXME: should not return to device code in case |
| 664 | * vm_stop() has been requested. |
| 665 | */ |
Jan Kiszka | b4a3d96 | 2011-02-01 22:15:43 +0100 | [diff] [blame] | 666 | cpu_stop_current(); |
Kevin Wolf | 5698346 | 2013-07-05 13:49:54 +0200 | [diff] [blame] | 667 | return 0; |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 668 | } |
Kevin Wolf | 5698346 | 2013-07-05 13:49:54 +0200 | [diff] [blame] | 669 | |
Stefan Hajnoczi | 4486e89 | 2018-03-07 14:42:05 +0000 | [diff] [blame] | 670 | return do_vm_stop(state, true); |
Blue Swirl | 296af7c | 2010-03-29 19:23:50 +0000 | [diff] [blame] | 671 | } |
| 672 | |
Claudio Imbrenda | 2d76e82 | 2017-02-14 18:07:47 +0100 | [diff] [blame] | 673 | /** |
| 674 | * Prepare for (re)starting the VM. |
| 675 | * Returns -1 if the vCPUs are not to be restarted (e.g. if they are already |
| 676 | * running or in case of an error condition), 0 otherwise. |
| 677 | */ |
Ivan Shcherbakov | d7482ff | 2022-03-02 17:28:33 -0800 | [diff] [blame] | 678 | int vm_prepare_start(bool step_pending) |
Claudio Imbrenda | 2d76e82 | 2017-02-14 18:07:47 +0100 | [diff] [blame] | 679 | { |
| 680 | RunState requested; |
Claudio Imbrenda | 2d76e82 | 2017-02-14 18:07:47 +0100 | [diff] [blame] | 681 | |
| 682 | qemu_vmstop_requested(&requested); |
| 683 | if (runstate_is_running() && requested == RUN_STATE__MAX) { |
| 684 | return -1; |
| 685 | } |
| 686 | |
| 687 | /* Ensure that a STOP/RESUME pair of events is emitted if a |
| 688 | * vmstop request was pending. The BLOCK_IO_ERROR event, for |
| 689 | * example, according to documentation is always followed by |
| 690 | * the STOP event. |
| 691 | */ |
| 692 | if (runstate_is_running()) { |
Peter Xu | 3ab7238 | 2018-08-15 21:37:37 +0800 | [diff] [blame] | 693 | qapi_event_send_stop(); |
| 694 | qapi_event_send_resume(); |
Markus Armbruster | f056158 | 2018-04-23 10:45:18 +0200 | [diff] [blame] | 695 | return -1; |
Claudio Imbrenda | 2d76e82 | 2017-02-14 18:07:47 +0100 | [diff] [blame] | 696 | } |
| 697 | |
Ivan Shcherbakov | d7482ff | 2022-03-02 17:28:33 -0800 | [diff] [blame] | 698 | /* |
| 699 | * WHPX accelerator needs to know whether we are going to step |
| 700 | * any CPUs, before starting the first one. |
| 701 | */ |
| 702 | if (cpus_accel->synchronize_pre_resume) { |
| 703 | cpus_accel->synchronize_pre_resume(step_pending); |
| 704 | } |
| 705 | |
Claudio Imbrenda | 2d76e82 | 2017-02-14 18:07:47 +0100 | [diff] [blame] | 706 | /* We are sending this now, but the CPUs will be resumed shortly later */ |
Peter Xu | 3ab7238 | 2018-08-15 21:37:37 +0800 | [diff] [blame] | 707 | qapi_event_send_resume(); |
Markus Armbruster | f056158 | 2018-04-23 10:45:18 +0200 | [diff] [blame] | 708 | |
Markus Armbruster | f056158 | 2018-04-23 10:45:18 +0200 | [diff] [blame] | 709 | cpu_enable_ticks(); |
| 710 | runstate_set(RUN_STATE_RUNNING); |
| 711 | vm_state_notify(1, RUN_STATE_RUNNING); |
| 712 | return 0; |
Claudio Imbrenda | 2d76e82 | 2017-02-14 18:07:47 +0100 | [diff] [blame] | 713 | } |
| 714 | |
| 715 | void vm_start(void) |
| 716 | { |
Ivan Shcherbakov | d7482ff | 2022-03-02 17:28:33 -0800 | [diff] [blame] | 717 | if (!vm_prepare_start(false)) { |
Claudio Imbrenda | 2d76e82 | 2017-02-14 18:07:47 +0100 | [diff] [blame] | 718 | resume_all_vcpus(); |
| 719 | } |
| 720 | } |
| 721 | |
Luiz Capitulino | 8a9236f | 2011-10-14 11:18:09 -0300 | [diff] [blame] | 722 | /* does a state transition even if the VM is already stopped, |
| 723 | current state is forgotten forever */ |
Kevin Wolf | 5698346 | 2013-07-05 13:49:54 +0200 | [diff] [blame] | 724 | int vm_stop_force_state(RunState state) |
Luiz Capitulino | 8a9236f | 2011-10-14 11:18:09 -0300 | [diff] [blame] | 725 | { |
| 726 | if (runstate_is_running()) { |
Kevin Wolf | 5698346 | 2013-07-05 13:49:54 +0200 | [diff] [blame] | 727 | return vm_stop(state); |
Luiz Capitulino | 8a9236f | 2011-10-14 11:18:09 -0300 | [diff] [blame] | 728 | } else { |
Daniel P. Berrangé | 8af3f5c | 2021-04-15 14:33:51 +0100 | [diff] [blame] | 729 | int ret; |
Luiz Capitulino | 8a9236f | 2011-10-14 11:18:09 -0300 | [diff] [blame] | 730 | runstate_set(state); |
Wen Congyang | b2780d3 | 2015-11-20 17:34:38 +0800 | [diff] [blame] | 731 | |
| 732 | bdrv_drain_all(); |
Kevin Wolf | 594a45c | 2013-07-18 14:52:19 +0200 | [diff] [blame] | 733 | /* Make sure to return an error if the flush in a previous vm_stop() |
| 734 | * failed. */ |
Daniel P. Berrangé | 8af3f5c | 2021-04-15 14:33:51 +0100 | [diff] [blame] | 735 | ret = bdrv_flush_all(); |
| 736 | trace_vm_stop_flush_all(ret); |
| 737 | return ret; |
Luiz Capitulino | 8a9236f | 2011-10-14 11:18:09 -0300 | [diff] [blame] | 738 | } |
| 739 | } |
| 740 | |
Luiz Capitulino | 0cfd6a9 | 2011-11-22 16:32:37 -0200 | [diff] [blame] | 741 | void qmp_memsave(int64_t addr, int64_t size, const char *filename, |
| 742 | bool has_cpu, int64_t cpu_index, Error **errp) |
| 743 | { |
| 744 | FILE *f; |
| 745 | uint32_t l; |
Andreas Färber | 55e5c28 | 2012-12-17 06:18:02 +0100 | [diff] [blame] | 746 | CPUState *cpu; |
Luiz Capitulino | 0cfd6a9 | 2011-11-22 16:32:37 -0200 | [diff] [blame] | 747 | uint8_t buf[1024]; |
Borislav Petkov | 0dc9daf | 2015-02-08 13:14:38 +0100 | [diff] [blame] | 748 | int64_t orig_addr = addr, orig_size = size; |
Luiz Capitulino | 0cfd6a9 | 2011-11-22 16:32:37 -0200 | [diff] [blame] | 749 | |
| 750 | if (!has_cpu) { |
| 751 | cpu_index = 0; |
| 752 | } |
| 753 | |
Andreas Färber | 151d132 | 2013-02-15 15:41:49 +0100 | [diff] [blame] | 754 | cpu = qemu_get_cpu(cpu_index); |
| 755 | if (cpu == NULL) { |
Markus Armbruster | c6bd8c7 | 2015-03-17 11:54:50 +0100 | [diff] [blame] | 756 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "cpu-index", |
| 757 | "a CPU number"); |
Luiz Capitulino | 0cfd6a9 | 2011-11-22 16:32:37 -0200 | [diff] [blame] | 758 | return; |
| 759 | } |
| 760 | |
| 761 | f = fopen(filename, "wb"); |
| 762 | if (!f) { |
Luiz Capitulino | 618da85 | 2013-06-07 14:35:06 -0400 | [diff] [blame] | 763 | error_setg_file_open(errp, errno, filename); |
Luiz Capitulino | 0cfd6a9 | 2011-11-22 16:32:37 -0200 | [diff] [blame] | 764 | return; |
| 765 | } |
| 766 | |
| 767 | while (size != 0) { |
| 768 | l = sizeof(buf); |
| 769 | if (l > size) |
| 770 | l = size; |
Aneesh Kumar K.V | 2f4d0f5 | 2013-10-01 21:49:30 +0530 | [diff] [blame] | 771 | if (cpu_memory_rw_debug(cpu, addr, buf, l, 0) != 0) { |
Borislav Petkov | 0dc9daf | 2015-02-08 13:14:38 +0100 | [diff] [blame] | 772 | error_setg(errp, "Invalid addr 0x%016" PRIx64 "/size %" PRId64 |
| 773 | " specified", orig_addr, orig_size); |
Aneesh Kumar K.V | 2f4d0f5 | 2013-10-01 21:49:30 +0530 | [diff] [blame] | 774 | goto exit; |
| 775 | } |
Luiz Capitulino | 0cfd6a9 | 2011-11-22 16:32:37 -0200 | [diff] [blame] | 776 | if (fwrite(buf, 1, l, f) != l) { |
Markus Armbruster | c6bd8c7 | 2015-03-17 11:54:50 +0100 | [diff] [blame] | 777 | error_setg(errp, QERR_IO_ERROR); |
Luiz Capitulino | 0cfd6a9 | 2011-11-22 16:32:37 -0200 | [diff] [blame] | 778 | goto exit; |
| 779 | } |
| 780 | addr += l; |
| 781 | size -= l; |
| 782 | } |
| 783 | |
| 784 | exit: |
| 785 | fclose(f); |
| 786 | } |
Luiz Capitulino | 6d3962b | 2011-11-22 17:26:46 -0200 | [diff] [blame] | 787 | |
| 788 | void qmp_pmemsave(int64_t addr, int64_t size, const char *filename, |
| 789 | Error **errp) |
| 790 | { |
| 791 | FILE *f; |
| 792 | uint32_t l; |
| 793 | uint8_t buf[1024]; |
| 794 | |
| 795 | f = fopen(filename, "wb"); |
| 796 | if (!f) { |
Luiz Capitulino | 618da85 | 2013-06-07 14:35:06 -0400 | [diff] [blame] | 797 | error_setg_file_open(errp, errno, filename); |
Luiz Capitulino | 6d3962b | 2011-11-22 17:26:46 -0200 | [diff] [blame] | 798 | return; |
| 799 | } |
| 800 | |
| 801 | while (size != 0) { |
| 802 | l = sizeof(buf); |
| 803 | if (l > size) |
| 804 | l = size; |
Stefan Weil | eb6282f | 2014-04-07 20:28:23 +0200 | [diff] [blame] | 805 | cpu_physical_memory_read(addr, buf, l); |
Luiz Capitulino | 6d3962b | 2011-11-22 17:26:46 -0200 | [diff] [blame] | 806 | if (fwrite(buf, 1, l, f) != l) { |
Markus Armbruster | c6bd8c7 | 2015-03-17 11:54:50 +0100 | [diff] [blame] | 807 | error_setg(errp, QERR_IO_ERROR); |
Luiz Capitulino | 6d3962b | 2011-11-22 17:26:46 -0200 | [diff] [blame] | 808 | goto exit; |
| 809 | } |
| 810 | addr += l; |
| 811 | size -= l; |
| 812 | } |
| 813 | |
| 814 | exit: |
| 815 | fclose(f); |
| 816 | } |
Luiz Capitulino | ab49ab5 | 2011-11-23 12:55:53 -0200 | [diff] [blame] | 817 | |
| 818 | void qmp_inject_nmi(Error **errp) |
| 819 | { |
Kevin Wolf | 947e474 | 2020-10-05 17:58:44 +0200 | [diff] [blame] | 820 | nmi_monitor_handle(monitor_get_cpu_index(monitor_cur()), errp); |
Luiz Capitulino | ab49ab5 | 2011-11-23 12:55:53 -0200 | [diff] [blame] | 821 | } |
Sebastian Tanase | 27498be | 2014-07-25 11:56:33 +0200 | [diff] [blame] | 822 | |