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1 | 296af7c9 | Blue Swirl | /*
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2 | 296af7c9 | Blue Swirl | * QEMU System Emulator
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3 | 296af7c9 | Blue Swirl | *
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4 | 296af7c9 | Blue Swirl | * Copyright (c) 2003-2008 Fabrice Bellard
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5 | 296af7c9 | Blue Swirl | *
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6 | 296af7c9 | Blue Swirl | * Permission is hereby granted, free of charge, to any person obtaining a copy
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7 | 296af7c9 | Blue Swirl | * of this software and associated documentation files (the "Software"), to deal
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8 | 296af7c9 | Blue Swirl | * in the Software without restriction, including without limitation the rights
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9 | 296af7c9 | Blue Swirl | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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10 | 296af7c9 | Blue Swirl | * copies of the Software, and to permit persons to whom the Software is
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11 | 296af7c9 | Blue Swirl | * furnished to do so, subject to the following conditions:
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12 | 296af7c9 | Blue Swirl | *
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13 | 296af7c9 | Blue Swirl | * The above copyright notice and this permission notice shall be included in
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14 | 296af7c9 | Blue Swirl | * all copies or substantial portions of the Software.
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15 | 296af7c9 | Blue Swirl | *
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16 | 296af7c9 | Blue Swirl | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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17 | 296af7c9 | Blue Swirl | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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18 | 296af7c9 | Blue Swirl | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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19 | 296af7c9 | Blue Swirl | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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20 | 296af7c9 | Blue Swirl | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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21 | 296af7c9 | Blue Swirl | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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22 | 296af7c9 | Blue Swirl | * THE SOFTWARE.
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23 | 296af7c9 | Blue Swirl | */
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24 | 296af7c9 | Blue Swirl | |
25 | 296af7c9 | Blue Swirl | /* Needed early for CONFIG_BSD etc. */
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26 | 296af7c9 | Blue Swirl | #include "config-host.h" |
27 | 296af7c9 | Blue Swirl | |
28 | 296af7c9 | Blue Swirl | #include "monitor.h" |
29 | 296af7c9 | Blue Swirl | #include "sysemu.h" |
30 | 296af7c9 | Blue Swirl | #include "gdbstub.h" |
31 | 296af7c9 | Blue Swirl | #include "dma.h" |
32 | 296af7c9 | Blue Swirl | #include "kvm.h" |
33 | 262ea18e | Jan Kiszka | #include "exec-all.h" |
34 | 296af7c9 | Blue Swirl | |
35 | 96284e89 | Paolo Bonzini | #include "qemu-thread.h" |
36 | 296af7c9 | Blue Swirl | #include "cpus.h" |
37 | a8486bc9 | Marcelo Tosatti | #include "compatfd.h" |
38 | 296af7c9 | Blue Swirl | |
39 | 7277e027 | Blue Swirl | #ifdef SIGRTMIN
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40 | 7277e027 | Blue Swirl | #define SIG_IPI (SIGRTMIN+4) |
41 | 7277e027 | Blue Swirl | #else
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42 | 7277e027 | Blue Swirl | #define SIG_IPI SIGUSR1
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43 | 7277e027 | Blue Swirl | #endif
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44 | 7277e027 | Blue Swirl | |
45 | 6d9cb73c | Jan Kiszka | #ifdef CONFIG_LINUX
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46 | 6d9cb73c | Jan Kiszka | |
47 | 6d9cb73c | Jan Kiszka | #include <sys/prctl.h> |
48 | 6d9cb73c | Jan Kiszka | |
49 | c0532a76 | Marcelo Tosatti | #ifndef PR_MCE_KILL
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50 | c0532a76 | Marcelo Tosatti | #define PR_MCE_KILL 33 |
51 | c0532a76 | Marcelo Tosatti | #endif
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52 | c0532a76 | Marcelo Tosatti | |
53 | 6d9cb73c | Jan Kiszka | #ifndef PR_MCE_KILL_SET
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54 | 6d9cb73c | Jan Kiszka | #define PR_MCE_KILL_SET 1 |
55 | 6d9cb73c | Jan Kiszka | #endif
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56 | 6d9cb73c | Jan Kiszka | |
57 | 6d9cb73c | Jan Kiszka | #ifndef PR_MCE_KILL_EARLY
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58 | 6d9cb73c | Jan Kiszka | #define PR_MCE_KILL_EARLY 1 |
59 | 6d9cb73c | Jan Kiszka | #endif
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60 | 6d9cb73c | Jan Kiszka | |
61 | 6d9cb73c | Jan Kiszka | #endif /* CONFIG_LINUX */ |
62 | 6d9cb73c | Jan Kiszka | |
63 | 296af7c9 | Blue Swirl | static CPUState *next_cpu;
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64 | 296af7c9 | Blue Swirl | |
65 | 296af7c9 | Blue Swirl | /***********************************************************/
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66 | 296af7c9 | Blue Swirl | void hw_error(const char *fmt, ...) |
67 | 296af7c9 | Blue Swirl | { |
68 | 296af7c9 | Blue Swirl | va_list ap; |
69 | 296af7c9 | Blue Swirl | CPUState *env; |
70 | 296af7c9 | Blue Swirl | |
71 | 296af7c9 | Blue Swirl | va_start(ap, fmt); |
72 | 296af7c9 | Blue Swirl | fprintf(stderr, "qemu: hardware error: ");
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73 | 296af7c9 | Blue Swirl | vfprintf(stderr, fmt, ap); |
74 | 296af7c9 | Blue Swirl | fprintf(stderr, "\n");
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75 | 296af7c9 | Blue Swirl | for(env = first_cpu; env != NULL; env = env->next_cpu) { |
76 | 296af7c9 | Blue Swirl | fprintf(stderr, "CPU #%d:\n", env->cpu_index);
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77 | 296af7c9 | Blue Swirl | #ifdef TARGET_I386
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78 | 296af7c9 | Blue Swirl | cpu_dump_state(env, stderr, fprintf, X86_DUMP_FPU); |
79 | 296af7c9 | Blue Swirl | #else
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80 | 296af7c9 | Blue Swirl | cpu_dump_state(env, stderr, fprintf, 0);
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81 | 296af7c9 | Blue Swirl | #endif
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82 | 296af7c9 | Blue Swirl | } |
83 | 296af7c9 | Blue Swirl | va_end(ap); |
84 | 296af7c9 | Blue Swirl | abort(); |
85 | 296af7c9 | Blue Swirl | } |
86 | 296af7c9 | Blue Swirl | |
87 | 296af7c9 | Blue Swirl | void cpu_synchronize_all_states(void) |
88 | 296af7c9 | Blue Swirl | { |
89 | 296af7c9 | Blue Swirl | CPUState *cpu; |
90 | 296af7c9 | Blue Swirl | |
91 | 296af7c9 | Blue Swirl | for (cpu = first_cpu; cpu; cpu = cpu->next_cpu) {
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92 | 296af7c9 | Blue Swirl | cpu_synchronize_state(cpu); |
93 | 296af7c9 | Blue Swirl | } |
94 | 296af7c9 | Blue Swirl | } |
95 | 296af7c9 | Blue Swirl | |
96 | 296af7c9 | Blue Swirl | void cpu_synchronize_all_post_reset(void) |
97 | 296af7c9 | Blue Swirl | { |
98 | 296af7c9 | Blue Swirl | CPUState *cpu; |
99 | 296af7c9 | Blue Swirl | |
100 | 296af7c9 | Blue Swirl | for (cpu = first_cpu; cpu; cpu = cpu->next_cpu) {
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101 | 296af7c9 | Blue Swirl | cpu_synchronize_post_reset(cpu); |
102 | 296af7c9 | Blue Swirl | } |
103 | 296af7c9 | Blue Swirl | } |
104 | 296af7c9 | Blue Swirl | |
105 | 296af7c9 | Blue Swirl | void cpu_synchronize_all_post_init(void) |
106 | 296af7c9 | Blue Swirl | { |
107 | 296af7c9 | Blue Swirl | CPUState *cpu; |
108 | 296af7c9 | Blue Swirl | |
109 | 296af7c9 | Blue Swirl | for (cpu = first_cpu; cpu; cpu = cpu->next_cpu) {
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110 | 296af7c9 | Blue Swirl | cpu_synchronize_post_init(cpu); |
111 | 296af7c9 | Blue Swirl | } |
112 | 296af7c9 | Blue Swirl | } |
113 | 296af7c9 | Blue Swirl | |
114 | 3ae9501c | Marcelo Tosatti | int cpu_is_stopped(CPUState *env)
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115 | 3ae9501c | Marcelo Tosatti | { |
116 | 3ae9501c | Marcelo Tosatti | return !vm_running || env->stopped;
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117 | 3ae9501c | Marcelo Tosatti | } |
118 | 3ae9501c | Marcelo Tosatti | |
119 | 296af7c9 | Blue Swirl | static void do_vm_stop(int reason) |
120 | 296af7c9 | Blue Swirl | { |
121 | 296af7c9 | Blue Swirl | if (vm_running) {
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122 | 296af7c9 | Blue Swirl | cpu_disable_ticks(); |
123 | 296af7c9 | Blue Swirl | vm_running = 0;
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124 | 296af7c9 | Blue Swirl | pause_all_vcpus(); |
125 | 296af7c9 | Blue Swirl | vm_state_notify(0, reason);
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126 | 55df6f33 | Michael S. Tsirkin | qemu_aio_flush(); |
127 | 55df6f33 | Michael S. Tsirkin | bdrv_flush_all(); |
128 | 296af7c9 | Blue Swirl | monitor_protocol_event(QEVENT_STOP, NULL);
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129 | 296af7c9 | Blue Swirl | } |
130 | 296af7c9 | Blue Swirl | } |
131 | 296af7c9 | Blue Swirl | |
132 | 296af7c9 | Blue Swirl | static int cpu_can_run(CPUState *env) |
133 | 296af7c9 | Blue Swirl | { |
134 | 0ab07c62 | Jan Kiszka | if (env->stop) {
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135 | 296af7c9 | Blue Swirl | return 0; |
136 | 0ab07c62 | Jan Kiszka | } |
137 | 0ab07c62 | Jan Kiszka | if (env->stopped || !vm_running) {
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138 | 296af7c9 | Blue Swirl | return 0; |
139 | 0ab07c62 | Jan Kiszka | } |
140 | 296af7c9 | Blue Swirl | return 1; |
141 | 296af7c9 | Blue Swirl | } |
142 | 296af7c9 | Blue Swirl | |
143 | 16400322 | Jan Kiszka | static bool cpu_thread_is_idle(CPUState *env) |
144 | 296af7c9 | Blue Swirl | { |
145 | 16400322 | Jan Kiszka | if (env->stop || env->queued_work_first) {
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146 | 16400322 | Jan Kiszka | return false; |
147 | 16400322 | Jan Kiszka | } |
148 | 16400322 | Jan Kiszka | if (env->stopped || !vm_running) {
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149 | 16400322 | Jan Kiszka | return true; |
150 | 16400322 | Jan Kiszka | } |
151 | 16400322 | Jan Kiszka | if (!env->halted || qemu_cpu_has_work(env)) {
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152 | 16400322 | Jan Kiszka | return false; |
153 | 16400322 | Jan Kiszka | } |
154 | 16400322 | Jan Kiszka | return true; |
155 | 296af7c9 | Blue Swirl | } |
156 | 296af7c9 | Blue Swirl | |
157 | 16400322 | Jan Kiszka | static bool all_cpu_threads_idle(void) |
158 | 296af7c9 | Blue Swirl | { |
159 | 296af7c9 | Blue Swirl | CPUState *env; |
160 | 296af7c9 | Blue Swirl | |
161 | 16400322 | Jan Kiszka | for (env = first_cpu; env != NULL; env = env->next_cpu) { |
162 | 16400322 | Jan Kiszka | if (!cpu_thread_is_idle(env)) {
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163 | 16400322 | Jan Kiszka | return false; |
164 | 16400322 | Jan Kiszka | } |
165 | 16400322 | Jan Kiszka | } |
166 | 16400322 | Jan Kiszka | return true; |
167 | 296af7c9 | Blue Swirl | } |
168 | 296af7c9 | Blue Swirl | |
169 | 83f338f7 | Jan Kiszka | static CPUDebugExcpHandler *debug_excp_handler;
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170 | 83f338f7 | Jan Kiszka | |
171 | 83f338f7 | Jan Kiszka | CPUDebugExcpHandler *cpu_set_debug_excp_handler(CPUDebugExcpHandler *handler) |
172 | 83f338f7 | Jan Kiszka | { |
173 | 83f338f7 | Jan Kiszka | CPUDebugExcpHandler *old_handler = debug_excp_handler; |
174 | 83f338f7 | Jan Kiszka | |
175 | 83f338f7 | Jan Kiszka | debug_excp_handler = handler; |
176 | 83f338f7 | Jan Kiszka | return old_handler;
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177 | 83f338f7 | Jan Kiszka | } |
178 | 83f338f7 | Jan Kiszka | |
179 | 83f338f7 | Jan Kiszka | static void cpu_handle_debug_exception(CPUState *env) |
180 | 3c638d06 | Jan Kiszka | { |
181 | 83f338f7 | Jan Kiszka | CPUWatchpoint *wp; |
182 | 83f338f7 | Jan Kiszka | |
183 | 83f338f7 | Jan Kiszka | if (!env->watchpoint_hit) {
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184 | 83f338f7 | Jan Kiszka | QTAILQ_FOREACH(wp, &env->watchpoints, entry) { |
185 | 83f338f7 | Jan Kiszka | wp->flags &= ~BP_WATCHPOINT_HIT; |
186 | 83f338f7 | Jan Kiszka | } |
187 | 83f338f7 | Jan Kiszka | } |
188 | 83f338f7 | Jan Kiszka | if (debug_excp_handler) {
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189 | 83f338f7 | Jan Kiszka | debug_excp_handler(env); |
190 | 83f338f7 | Jan Kiszka | } |
191 | 83f338f7 | Jan Kiszka | |
192 | 3c638d06 | Jan Kiszka | gdb_set_stop_cpu(env); |
193 | 8cf71710 | Jan Kiszka | qemu_system_debug_request(); |
194 | 83f338f7 | Jan Kiszka | #ifdef CONFIG_IOTHREAD
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195 | 83f338f7 | Jan Kiszka | env->stopped = 1;
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196 | 83f338f7 | Jan Kiszka | #endif
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197 | 3c638d06 | Jan Kiszka | } |
198 | 3c638d06 | Jan Kiszka | |
199 | 6d9cb73c | Jan Kiszka | #ifdef CONFIG_LINUX
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200 | 6d9cb73c | Jan Kiszka | static void sigbus_reraise(void) |
201 | 6d9cb73c | Jan Kiszka | { |
202 | 6d9cb73c | Jan Kiszka | sigset_t set; |
203 | 6d9cb73c | Jan Kiszka | struct sigaction action;
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204 | 6d9cb73c | Jan Kiszka | |
205 | 6d9cb73c | Jan Kiszka | memset(&action, 0, sizeof(action)); |
206 | 6d9cb73c | Jan Kiszka | action.sa_handler = SIG_DFL; |
207 | 6d9cb73c | Jan Kiszka | if (!sigaction(SIGBUS, &action, NULL)) { |
208 | 6d9cb73c | Jan Kiszka | raise(SIGBUS); |
209 | 6d9cb73c | Jan Kiszka | sigemptyset(&set); |
210 | 6d9cb73c | Jan Kiszka | sigaddset(&set, SIGBUS); |
211 | 6d9cb73c | Jan Kiszka | sigprocmask(SIG_UNBLOCK, &set, NULL);
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212 | 6d9cb73c | Jan Kiszka | } |
213 | 6d9cb73c | Jan Kiszka | perror("Failed to re-raise SIGBUS!\n");
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214 | 6d9cb73c | Jan Kiszka | abort(); |
215 | 6d9cb73c | Jan Kiszka | } |
216 | 6d9cb73c | Jan Kiszka | |
217 | 6d9cb73c | Jan Kiszka | static void sigbus_handler(int n, struct qemu_signalfd_siginfo *siginfo, |
218 | 6d9cb73c | Jan Kiszka | void *ctx)
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219 | 6d9cb73c | Jan Kiszka | { |
220 | 6d9cb73c | Jan Kiszka | if (kvm_on_sigbus(siginfo->ssi_code,
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221 | 6d9cb73c | Jan Kiszka | (void *)(intptr_t)siginfo->ssi_addr)) {
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222 | 6d9cb73c | Jan Kiszka | sigbus_reraise(); |
223 | 6d9cb73c | Jan Kiszka | } |
224 | 6d9cb73c | Jan Kiszka | } |
225 | 6d9cb73c | Jan Kiszka | |
226 | 6d9cb73c | Jan Kiszka | static void qemu_init_sigbus(void) |
227 | 6d9cb73c | Jan Kiszka | { |
228 | 6d9cb73c | Jan Kiszka | struct sigaction action;
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229 | 6d9cb73c | Jan Kiszka | |
230 | 6d9cb73c | Jan Kiszka | memset(&action, 0, sizeof(action)); |
231 | 6d9cb73c | Jan Kiszka | action.sa_flags = SA_SIGINFO; |
232 | 6d9cb73c | Jan Kiszka | action.sa_sigaction = (void (*)(int, siginfo_t*, void*))sigbus_handler; |
233 | 6d9cb73c | Jan Kiszka | sigaction(SIGBUS, &action, NULL);
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234 | 6d9cb73c | Jan Kiszka | |
235 | 6d9cb73c | Jan Kiszka | prctl(PR_MCE_KILL, PR_MCE_KILL_SET, PR_MCE_KILL_EARLY, 0, 0); |
236 | 6d9cb73c | Jan Kiszka | } |
237 | 6d9cb73c | Jan Kiszka | |
238 | 6d9cb73c | Jan Kiszka | #else /* !CONFIG_LINUX */ |
239 | 6d9cb73c | Jan Kiszka | |
240 | 6d9cb73c | Jan Kiszka | static void qemu_init_sigbus(void) |
241 | 6d9cb73c | Jan Kiszka | { |
242 | 6d9cb73c | Jan Kiszka | } |
243 | 6d9cb73c | Jan Kiszka | #endif /* !CONFIG_LINUX */ |
244 | 6d9cb73c | Jan Kiszka | |
245 | 296af7c9 | Blue Swirl | #ifndef _WIN32
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246 | 296af7c9 | Blue Swirl | static int io_thread_fd = -1; |
247 | 296af7c9 | Blue Swirl | |
248 | 296af7c9 | Blue Swirl | static void qemu_event_increment(void) |
249 | 296af7c9 | Blue Swirl | { |
250 | 296af7c9 | Blue Swirl | /* Write 8 bytes to be compatible with eventfd. */
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251 | 26a82330 | Blue Swirl | static const uint64_t val = 1; |
252 | 296af7c9 | Blue Swirl | ssize_t ret; |
253 | 296af7c9 | Blue Swirl | |
254 | 0ab07c62 | Jan Kiszka | if (io_thread_fd == -1) { |
255 | 296af7c9 | Blue Swirl | return;
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256 | 0ab07c62 | Jan Kiszka | } |
257 | 296af7c9 | Blue Swirl | do {
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258 | 296af7c9 | Blue Swirl | ret = write(io_thread_fd, &val, sizeof(val));
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259 | 296af7c9 | Blue Swirl | } while (ret < 0 && errno == EINTR); |
260 | 296af7c9 | Blue Swirl | |
261 | 296af7c9 | Blue Swirl | /* EAGAIN is fine, a read must be pending. */
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262 | 296af7c9 | Blue Swirl | if (ret < 0 && errno != EAGAIN) { |
263 | 296af7c9 | Blue Swirl | fprintf(stderr, "qemu_event_increment: write() filed: %s\n",
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264 | 296af7c9 | Blue Swirl | strerror(errno)); |
265 | 296af7c9 | Blue Swirl | exit (1);
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266 | 296af7c9 | Blue Swirl | } |
267 | 296af7c9 | Blue Swirl | } |
268 | 296af7c9 | Blue Swirl | |
269 | 296af7c9 | Blue Swirl | static void qemu_event_read(void *opaque) |
270 | 296af7c9 | Blue Swirl | { |
271 | 296af7c9 | Blue Swirl | int fd = (unsigned long)opaque; |
272 | 296af7c9 | Blue Swirl | ssize_t len; |
273 | 296af7c9 | Blue Swirl | char buffer[512]; |
274 | 296af7c9 | Blue Swirl | |
275 | 296af7c9 | Blue Swirl | /* Drain the notify pipe. For eventfd, only 8 bytes will be read. */
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276 | 296af7c9 | Blue Swirl | do {
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277 | 296af7c9 | Blue Swirl | len = read(fd, buffer, sizeof(buffer));
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278 | 296af7c9 | Blue Swirl | } while ((len == -1 && errno == EINTR) || len == sizeof(buffer)); |
279 | 296af7c9 | Blue Swirl | } |
280 | 296af7c9 | Blue Swirl | |
281 | 296af7c9 | Blue Swirl | static int qemu_event_init(void) |
282 | 296af7c9 | Blue Swirl | { |
283 | 296af7c9 | Blue Swirl | int err;
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284 | 296af7c9 | Blue Swirl | int fds[2]; |
285 | 296af7c9 | Blue Swirl | |
286 | 296af7c9 | Blue Swirl | err = qemu_eventfd(fds); |
287 | 0ab07c62 | Jan Kiszka | if (err == -1) { |
288 | 296af7c9 | Blue Swirl | return -errno;
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289 | 0ab07c62 | Jan Kiszka | } |
290 | 296af7c9 | Blue Swirl | err = fcntl_setfl(fds[0], O_NONBLOCK);
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291 | 0ab07c62 | Jan Kiszka | if (err < 0) { |
292 | 296af7c9 | Blue Swirl | goto fail;
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293 | 0ab07c62 | Jan Kiszka | } |
294 | 296af7c9 | Blue Swirl | err = fcntl_setfl(fds[1], O_NONBLOCK);
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295 | 0ab07c62 | Jan Kiszka | if (err < 0) { |
296 | 296af7c9 | Blue Swirl | goto fail;
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297 | 0ab07c62 | Jan Kiszka | } |
298 | 296af7c9 | Blue Swirl | qemu_set_fd_handler2(fds[0], NULL, qemu_event_read, NULL, |
299 | 296af7c9 | Blue Swirl | (void *)(unsigned long)fds[0]); |
300 | 296af7c9 | Blue Swirl | |
301 | 296af7c9 | Blue Swirl | io_thread_fd = fds[1];
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302 | 296af7c9 | Blue Swirl | return 0; |
303 | 296af7c9 | Blue Swirl | |
304 | 296af7c9 | Blue Swirl | fail:
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305 | 296af7c9 | Blue Swirl | close(fds[0]);
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306 | 296af7c9 | Blue Swirl | close(fds[1]);
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307 | 296af7c9 | Blue Swirl | return err;
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308 | 296af7c9 | Blue Swirl | } |
309 | 55f8d6ac | Jan Kiszka | |
310 | 55f8d6ac | Jan Kiszka | static void dummy_signal(int sig) |
311 | 55f8d6ac | Jan Kiszka | { |
312 | 55f8d6ac | Jan Kiszka | } |
313 | 55f8d6ac | Jan Kiszka | |
314 | d0f294ce | Jan Kiszka | /* If we have signalfd, we mask out the signals we want to handle and then
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315 | d0f294ce | Jan Kiszka | * use signalfd to listen for them. We rely on whatever the current signal
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316 | d0f294ce | Jan Kiszka | * handler is to dispatch the signals when we receive them.
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317 | d0f294ce | Jan Kiszka | */
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318 | d0f294ce | Jan Kiszka | static void sigfd_handler(void *opaque) |
319 | d0f294ce | Jan Kiszka | { |
320 | d0f294ce | Jan Kiszka | int fd = (unsigned long) opaque; |
321 | d0f294ce | Jan Kiszka | struct qemu_signalfd_siginfo info;
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322 | d0f294ce | Jan Kiszka | struct sigaction action;
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323 | d0f294ce | Jan Kiszka | ssize_t len; |
324 | d0f294ce | Jan Kiszka | |
325 | d0f294ce | Jan Kiszka | while (1) { |
326 | d0f294ce | Jan Kiszka | do {
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327 | d0f294ce | Jan Kiszka | len = read(fd, &info, sizeof(info));
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328 | d0f294ce | Jan Kiszka | } while (len == -1 && errno == EINTR); |
329 | d0f294ce | Jan Kiszka | |
330 | d0f294ce | Jan Kiszka | if (len == -1 && errno == EAGAIN) { |
331 | d0f294ce | Jan Kiszka | break;
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332 | d0f294ce | Jan Kiszka | } |
333 | d0f294ce | Jan Kiszka | |
334 | d0f294ce | Jan Kiszka | if (len != sizeof(info)) { |
335 | d0f294ce | Jan Kiszka | printf("read from sigfd returned %zd: %m\n", len);
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336 | d0f294ce | Jan Kiszka | return;
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337 | d0f294ce | Jan Kiszka | } |
338 | d0f294ce | Jan Kiszka | |
339 | d0f294ce | Jan Kiszka | sigaction(info.ssi_signo, NULL, &action);
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340 | d0f294ce | Jan Kiszka | if ((action.sa_flags & SA_SIGINFO) && action.sa_sigaction) {
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341 | d0f294ce | Jan Kiszka | action.sa_sigaction(info.ssi_signo, |
342 | d0f294ce | Jan Kiszka | (siginfo_t *)&info, NULL);
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343 | d0f294ce | Jan Kiszka | } else if (action.sa_handler) { |
344 | d0f294ce | Jan Kiszka | action.sa_handler(info.ssi_signo); |
345 | d0f294ce | Jan Kiszka | } |
346 | d0f294ce | Jan Kiszka | } |
347 | d0f294ce | Jan Kiszka | } |
348 | d0f294ce | Jan Kiszka | |
349 | d0f294ce | Jan Kiszka | static int qemu_signalfd_init(sigset_t mask) |
350 | d0f294ce | Jan Kiszka | { |
351 | d0f294ce | Jan Kiszka | int sigfd;
|
352 | d0f294ce | Jan Kiszka | |
353 | d0f294ce | Jan Kiszka | sigfd = qemu_signalfd(&mask); |
354 | d0f294ce | Jan Kiszka | if (sigfd == -1) { |
355 | d0f294ce | Jan Kiszka | fprintf(stderr, "failed to create signalfd\n");
|
356 | d0f294ce | Jan Kiszka | return -errno;
|
357 | d0f294ce | Jan Kiszka | } |
358 | d0f294ce | Jan Kiszka | |
359 | d0f294ce | Jan Kiszka | fcntl_setfl(sigfd, O_NONBLOCK); |
360 | d0f294ce | Jan Kiszka | |
361 | d0f294ce | Jan Kiszka | qemu_set_fd_handler2(sigfd, NULL, sigfd_handler, NULL, |
362 | d0f294ce | Jan Kiszka | (void *)(unsigned long) sigfd); |
363 | d0f294ce | Jan Kiszka | |
364 | d0f294ce | Jan Kiszka | return 0; |
365 | d0f294ce | Jan Kiszka | } |
366 | d0f294ce | Jan Kiszka | |
367 | 9a36085b | Jan Kiszka | static void qemu_kvm_eat_signals(CPUState *env) |
368 | 9a36085b | Jan Kiszka | { |
369 | 9a36085b | Jan Kiszka | struct timespec ts = { 0, 0 }; |
370 | 9a36085b | Jan Kiszka | siginfo_t siginfo; |
371 | 9a36085b | Jan Kiszka | sigset_t waitset; |
372 | 9a36085b | Jan Kiszka | sigset_t chkset; |
373 | 9a36085b | Jan Kiszka | int r;
|
374 | 9a36085b | Jan Kiszka | |
375 | 9a36085b | Jan Kiszka | sigemptyset(&waitset); |
376 | 9a36085b | Jan Kiszka | sigaddset(&waitset, SIG_IPI); |
377 | 9a36085b | Jan Kiszka | sigaddset(&waitset, SIGBUS); |
378 | 9a36085b | Jan Kiszka | |
379 | 9a36085b | Jan Kiszka | do {
|
380 | 9a36085b | Jan Kiszka | r = sigtimedwait(&waitset, &siginfo, &ts); |
381 | 9a36085b | Jan Kiszka | if (r == -1 && !(errno == EAGAIN || errno == EINTR)) { |
382 | 9a36085b | Jan Kiszka | perror("sigtimedwait");
|
383 | 9a36085b | Jan Kiszka | exit(1);
|
384 | 9a36085b | Jan Kiszka | } |
385 | 9a36085b | Jan Kiszka | |
386 | 9a36085b | Jan Kiszka | switch (r) {
|
387 | 9a36085b | Jan Kiszka | case SIGBUS:
|
388 | 9a36085b | Jan Kiszka | if (kvm_on_sigbus_vcpu(env, siginfo.si_code, siginfo.si_addr)) {
|
389 | 9a36085b | Jan Kiszka | sigbus_reraise(); |
390 | 9a36085b | Jan Kiszka | } |
391 | 9a36085b | Jan Kiszka | break;
|
392 | 9a36085b | Jan Kiszka | default:
|
393 | 9a36085b | Jan Kiszka | break;
|
394 | 9a36085b | Jan Kiszka | } |
395 | 9a36085b | Jan Kiszka | |
396 | 9a36085b | Jan Kiszka | r = sigpending(&chkset); |
397 | 9a36085b | Jan Kiszka | if (r == -1) { |
398 | 9a36085b | Jan Kiszka | perror("sigpending");
|
399 | 9a36085b | Jan Kiszka | exit(1);
|
400 | 9a36085b | Jan Kiszka | } |
401 | 9a36085b | Jan Kiszka | } while (sigismember(&chkset, SIG_IPI) || sigismember(&chkset, SIGBUS));
|
402 | de758970 | Jan Kiszka | |
403 | de758970 | Jan Kiszka | #ifndef CONFIG_IOTHREAD
|
404 | de758970 | Jan Kiszka | if (sigismember(&chkset, SIGIO) || sigismember(&chkset, SIGALRM)) {
|
405 | de758970 | Jan Kiszka | qemu_notify_event(); |
406 | de758970 | Jan Kiszka | } |
407 | de758970 | Jan Kiszka | #endif
|
408 | 9a36085b | Jan Kiszka | } |
409 | 9a36085b | Jan Kiszka | |
410 | 55f8d6ac | Jan Kiszka | #else /* _WIN32 */ |
411 | 55f8d6ac | Jan Kiszka | |
412 | 296af7c9 | Blue Swirl | HANDLE qemu_event_handle; |
413 | 296af7c9 | Blue Swirl | |
414 | 296af7c9 | Blue Swirl | static void dummy_event_handler(void *opaque) |
415 | 296af7c9 | Blue Swirl | { |
416 | 296af7c9 | Blue Swirl | } |
417 | 296af7c9 | Blue Swirl | |
418 | 296af7c9 | Blue Swirl | static int qemu_event_init(void) |
419 | 296af7c9 | Blue Swirl | { |
420 | 296af7c9 | Blue Swirl | qemu_event_handle = CreateEvent(NULL, FALSE, FALSE, NULL); |
421 | 296af7c9 | Blue Swirl | if (!qemu_event_handle) {
|
422 | 296af7c9 | Blue Swirl | fprintf(stderr, "Failed CreateEvent: %ld\n", GetLastError());
|
423 | 296af7c9 | Blue Swirl | return -1; |
424 | 296af7c9 | Blue Swirl | } |
425 | 296af7c9 | Blue Swirl | qemu_add_wait_object(qemu_event_handle, dummy_event_handler, NULL);
|
426 | 296af7c9 | Blue Swirl | return 0; |
427 | 296af7c9 | Blue Swirl | } |
428 | 296af7c9 | Blue Swirl | |
429 | 296af7c9 | Blue Swirl | static void qemu_event_increment(void) |
430 | 296af7c9 | Blue Swirl | { |
431 | 296af7c9 | Blue Swirl | if (!SetEvent(qemu_event_handle)) {
|
432 | 296af7c9 | Blue Swirl | fprintf(stderr, "qemu_event_increment: SetEvent failed: %ld\n",
|
433 | 296af7c9 | Blue Swirl | GetLastError()); |
434 | 296af7c9 | Blue Swirl | exit (1);
|
435 | 296af7c9 | Blue Swirl | } |
436 | 296af7c9 | Blue Swirl | } |
437 | 9a36085b | Jan Kiszka | |
438 | 9a36085b | Jan Kiszka | static void qemu_kvm_eat_signals(CPUState *env) |
439 | 9a36085b | Jan Kiszka | { |
440 | 9a36085b | Jan Kiszka | } |
441 | 55f8d6ac | Jan Kiszka | #endif /* _WIN32 */ |
442 | 296af7c9 | Blue Swirl | |
443 | 296af7c9 | Blue Swirl | #ifndef CONFIG_IOTHREAD
|
444 | ff48eb5f | Jan Kiszka | static void qemu_kvm_init_cpu_signals(CPUState *env) |
445 | ff48eb5f | Jan Kiszka | { |
446 | ff48eb5f | Jan Kiszka | #ifndef _WIN32
|
447 | ff48eb5f | Jan Kiszka | int r;
|
448 | ff48eb5f | Jan Kiszka | sigset_t set; |
449 | ff48eb5f | Jan Kiszka | struct sigaction sigact;
|
450 | ff48eb5f | Jan Kiszka | |
451 | ff48eb5f | Jan Kiszka | memset(&sigact, 0, sizeof(sigact)); |
452 | ff48eb5f | Jan Kiszka | sigact.sa_handler = dummy_signal; |
453 | ff48eb5f | Jan Kiszka | sigaction(SIG_IPI, &sigact, NULL);
|
454 | ff48eb5f | Jan Kiszka | |
455 | ff48eb5f | Jan Kiszka | sigemptyset(&set); |
456 | ff48eb5f | Jan Kiszka | sigaddset(&set, SIG_IPI); |
457 | de758970 | Jan Kiszka | sigaddset(&set, SIGIO); |
458 | de758970 | Jan Kiszka | sigaddset(&set, SIGALRM); |
459 | ff48eb5f | Jan Kiszka | pthread_sigmask(SIG_BLOCK, &set, NULL);
|
460 | ff48eb5f | Jan Kiszka | |
461 | ff48eb5f | Jan Kiszka | pthread_sigmask(SIG_BLOCK, NULL, &set);
|
462 | ff48eb5f | Jan Kiszka | sigdelset(&set, SIG_IPI); |
463 | ff48eb5f | Jan Kiszka | sigdelset(&set, SIGBUS); |
464 | de758970 | Jan Kiszka | sigdelset(&set, SIGIO); |
465 | de758970 | Jan Kiszka | sigdelset(&set, SIGALRM); |
466 | ff48eb5f | Jan Kiszka | r = kvm_set_signal_mask(env, &set); |
467 | ff48eb5f | Jan Kiszka | if (r) {
|
468 | ff48eb5f | Jan Kiszka | fprintf(stderr, "kvm_set_signal_mask: %s\n", strerror(-r));
|
469 | ff48eb5f | Jan Kiszka | exit(1);
|
470 | ff48eb5f | Jan Kiszka | } |
471 | ff48eb5f | Jan Kiszka | #endif
|
472 | ff48eb5f | Jan Kiszka | } |
473 | ff48eb5f | Jan Kiszka | |
474 | de758970 | Jan Kiszka | #ifndef _WIN32
|
475 | de758970 | Jan Kiszka | static sigset_t block_synchronous_signals(void) |
476 | de758970 | Jan Kiszka | { |
477 | de758970 | Jan Kiszka | sigset_t set; |
478 | de758970 | Jan Kiszka | |
479 | de758970 | Jan Kiszka | sigemptyset(&set); |
480 | 6d9cb73c | Jan Kiszka | sigaddset(&set, SIGBUS); |
481 | de758970 | Jan Kiszka | if (kvm_enabled()) {
|
482 | de758970 | Jan Kiszka | /*
|
483 | de758970 | Jan Kiszka | * We need to process timer signals synchronously to avoid a race
|
484 | de758970 | Jan Kiszka | * between exit_request check and KVM vcpu entry.
|
485 | de758970 | Jan Kiszka | */
|
486 | de758970 | Jan Kiszka | sigaddset(&set, SIGIO); |
487 | de758970 | Jan Kiszka | sigaddset(&set, SIGALRM); |
488 | de758970 | Jan Kiszka | } |
489 | de758970 | Jan Kiszka | |
490 | de758970 | Jan Kiszka | return set;
|
491 | de758970 | Jan Kiszka | } |
492 | de758970 | Jan Kiszka | #endif
|
493 | de758970 | Jan Kiszka | |
494 | 296af7c9 | Blue Swirl | int qemu_init_main_loop(void) |
495 | 296af7c9 | Blue Swirl | { |
496 | d0f294ce | Jan Kiszka | #ifndef _WIN32
|
497 | d0f294ce | Jan Kiszka | sigset_t blocked_signals; |
498 | d0f294ce | Jan Kiszka | int ret;
|
499 | d0f294ce | Jan Kiszka | |
500 | de758970 | Jan Kiszka | blocked_signals = block_synchronous_signals(); |
501 | d0f294ce | Jan Kiszka | |
502 | d0f294ce | Jan Kiszka | ret = qemu_signalfd_init(blocked_signals); |
503 | d0f294ce | Jan Kiszka | if (ret) {
|
504 | d0f294ce | Jan Kiszka | return ret;
|
505 | d0f294ce | Jan Kiszka | } |
506 | d0f294ce | Jan Kiszka | #endif
|
507 | 3c638d06 | Jan Kiszka | |
508 | 6d9cb73c | Jan Kiszka | qemu_init_sigbus(); |
509 | 3c638d06 | Jan Kiszka | |
510 | 296af7c9 | Blue Swirl | return qemu_event_init();
|
511 | 296af7c9 | Blue Swirl | } |
512 | 296af7c9 | Blue Swirl | |
513 | 7277e027 | Blue Swirl | void qemu_main_loop_start(void) |
514 | 7277e027 | Blue Swirl | { |
515 | 7277e027 | Blue Swirl | } |
516 | 7277e027 | Blue Swirl | |
517 | 296af7c9 | Blue Swirl | void qemu_init_vcpu(void *_env) |
518 | 296af7c9 | Blue Swirl | { |
519 | 296af7c9 | Blue Swirl | CPUState *env = _env; |
520 | 84b4915d | Jan Kiszka | int r;
|
521 | 296af7c9 | Blue Swirl | |
522 | 296af7c9 | Blue Swirl | env->nr_cores = smp_cores; |
523 | 296af7c9 | Blue Swirl | env->nr_threads = smp_threads; |
524 | 84b4915d | Jan Kiszka | |
525 | 84b4915d | Jan Kiszka | if (kvm_enabled()) {
|
526 | 84b4915d | Jan Kiszka | r = kvm_init_vcpu(env); |
527 | 84b4915d | Jan Kiszka | if (r < 0) { |
528 | 84b4915d | Jan Kiszka | fprintf(stderr, "kvm_init_vcpu failed: %s\n", strerror(-r));
|
529 | 84b4915d | Jan Kiszka | exit(1);
|
530 | 84b4915d | Jan Kiszka | } |
531 | ff48eb5f | Jan Kiszka | qemu_kvm_init_cpu_signals(env); |
532 | 84b4915d | Jan Kiszka | } |
533 | 296af7c9 | Blue Swirl | } |
534 | 296af7c9 | Blue Swirl | |
535 | b7680cb6 | Jan Kiszka | int qemu_cpu_is_self(void *env) |
536 | 296af7c9 | Blue Swirl | { |
537 | 296af7c9 | Blue Swirl | return 1; |
538 | 296af7c9 | Blue Swirl | } |
539 | 296af7c9 | Blue Swirl | |
540 | e82bcec2 | Marcelo Tosatti | void run_on_cpu(CPUState *env, void (*func)(void *data), void *data) |
541 | e82bcec2 | Marcelo Tosatti | { |
542 | e82bcec2 | Marcelo Tosatti | func(data); |
543 | e82bcec2 | Marcelo Tosatti | } |
544 | e82bcec2 | Marcelo Tosatti | |
545 | 296af7c9 | Blue Swirl | void resume_all_vcpus(void) |
546 | 296af7c9 | Blue Swirl | { |
547 | 296af7c9 | Blue Swirl | } |
548 | 296af7c9 | Blue Swirl | |
549 | 296af7c9 | Blue Swirl | void pause_all_vcpus(void) |
550 | 296af7c9 | Blue Swirl | { |
551 | 296af7c9 | Blue Swirl | } |
552 | 296af7c9 | Blue Swirl | |
553 | 296af7c9 | Blue Swirl | void qemu_cpu_kick(void *env) |
554 | 296af7c9 | Blue Swirl | { |
555 | 296af7c9 | Blue Swirl | } |
556 | 296af7c9 | Blue Swirl | |
557 | 46d62fac | Jan Kiszka | void qemu_cpu_kick_self(void) |
558 | 46d62fac | Jan Kiszka | { |
559 | 46d62fac | Jan Kiszka | #ifndef _WIN32
|
560 | 46d62fac | Jan Kiszka | assert(cpu_single_env); |
561 | 46d62fac | Jan Kiszka | |
562 | 46d62fac | Jan Kiszka | raise(SIG_IPI); |
563 | 46d62fac | Jan Kiszka | #else
|
564 | 46d62fac | Jan Kiszka | abort(); |
565 | 46d62fac | Jan Kiszka | #endif
|
566 | 296af7c9 | Blue Swirl | } |
567 | 296af7c9 | Blue Swirl | |
568 | 296af7c9 | Blue Swirl | void qemu_notify_event(void) |
569 | 296af7c9 | Blue Swirl | { |
570 | 296af7c9 | Blue Swirl | CPUState *env = cpu_single_env; |
571 | 296af7c9 | Blue Swirl | |
572 | 296af7c9 | Blue Swirl | qemu_event_increment (); |
573 | 296af7c9 | Blue Swirl | if (env) {
|
574 | 296af7c9 | Blue Swirl | cpu_exit(env); |
575 | 296af7c9 | Blue Swirl | } |
576 | 296af7c9 | Blue Swirl | if (next_cpu && env != next_cpu) {
|
577 | 296af7c9 | Blue Swirl | cpu_exit(next_cpu); |
578 | 296af7c9 | Blue Swirl | } |
579 | 38145df2 | Jan Kiszka | exit_request = 1;
|
580 | 296af7c9 | Blue Swirl | } |
581 | 296af7c9 | Blue Swirl | |
582 | 296af7c9 | Blue Swirl | void qemu_mutex_lock_iothread(void) {} |
583 | 296af7c9 | Blue Swirl | void qemu_mutex_unlock_iothread(void) {} |
584 | 296af7c9 | Blue Swirl | |
585 | b4a3d965 | Jan Kiszka | void cpu_stop_current(void) |
586 | b4a3d965 | Jan Kiszka | { |
587 | b4a3d965 | Jan Kiszka | } |
588 | b4a3d965 | Jan Kiszka | |
589 | 296af7c9 | Blue Swirl | void vm_stop(int reason) |
590 | 296af7c9 | Blue Swirl | { |
591 | 296af7c9 | Blue Swirl | do_vm_stop(reason); |
592 | 296af7c9 | Blue Swirl | } |
593 | 296af7c9 | Blue Swirl | |
594 | 296af7c9 | Blue Swirl | #else /* CONFIG_IOTHREAD */ |
595 | 296af7c9 | Blue Swirl | |
596 | 296af7c9 | Blue Swirl | QemuMutex qemu_global_mutex; |
597 | 296af7c9 | Blue Swirl | static QemuMutex qemu_fair_mutex;
|
598 | 296af7c9 | Blue Swirl | |
599 | 296af7c9 | Blue Swirl | static QemuThread io_thread;
|
600 | 296af7c9 | Blue Swirl | |
601 | 296af7c9 | Blue Swirl | static QemuThread *tcg_cpu_thread;
|
602 | 296af7c9 | Blue Swirl | static QemuCond *tcg_halt_cond;
|
603 | 296af7c9 | Blue Swirl | |
604 | 296af7c9 | Blue Swirl | static int qemu_system_ready; |
605 | 296af7c9 | Blue Swirl | /* cpu creation */
|
606 | 296af7c9 | Blue Swirl | static QemuCond qemu_cpu_cond;
|
607 | 296af7c9 | Blue Swirl | /* system init */
|
608 | 296af7c9 | Blue Swirl | static QemuCond qemu_system_cond;
|
609 | 296af7c9 | Blue Swirl | static QemuCond qemu_pause_cond;
|
610 | e82bcec2 | Marcelo Tosatti | static QemuCond qemu_work_cond;
|
611 | 296af7c9 | Blue Swirl | |
612 | 55f8d6ac | Jan Kiszka | static void cpu_signal(int sig) |
613 | a8486bc9 | Marcelo Tosatti | { |
614 | 55f8d6ac | Jan Kiszka | if (cpu_single_env) {
|
615 | 55f8d6ac | Jan Kiszka | cpu_exit(cpu_single_env); |
616 | 55f8d6ac | Jan Kiszka | } |
617 | 55f8d6ac | Jan Kiszka | exit_request = 1;
|
618 | 55f8d6ac | Jan Kiszka | } |
619 | a8486bc9 | Marcelo Tosatti | |
620 | 55f8d6ac | Jan Kiszka | static void qemu_kvm_init_cpu_signals(CPUState *env) |
621 | 55f8d6ac | Jan Kiszka | { |
622 | 55f8d6ac | Jan Kiszka | int r;
|
623 | 55f8d6ac | Jan Kiszka | sigset_t set; |
624 | 55f8d6ac | Jan Kiszka | struct sigaction sigact;
|
625 | a8486bc9 | Marcelo Tosatti | |
626 | 55f8d6ac | Jan Kiszka | memset(&sigact, 0, sizeof(sigact)); |
627 | 55f8d6ac | Jan Kiszka | sigact.sa_handler = dummy_signal; |
628 | 55f8d6ac | Jan Kiszka | sigaction(SIG_IPI, &sigact, NULL);
|
629 | a8486bc9 | Marcelo Tosatti | |
630 | 55f8d6ac | Jan Kiszka | pthread_sigmask(SIG_BLOCK, NULL, &set);
|
631 | 55f8d6ac | Jan Kiszka | sigdelset(&set, SIG_IPI); |
632 | 55f8d6ac | Jan Kiszka | sigdelset(&set, SIGBUS); |
633 | 55f8d6ac | Jan Kiszka | r = kvm_set_signal_mask(env, &set); |
634 | 55f8d6ac | Jan Kiszka | if (r) {
|
635 | 55f8d6ac | Jan Kiszka | fprintf(stderr, "kvm_set_signal_mask: %s\n", strerror(-r));
|
636 | 55f8d6ac | Jan Kiszka | exit(1);
|
637 | a8486bc9 | Marcelo Tosatti | } |
638 | a8486bc9 | Marcelo Tosatti | } |
639 | a8486bc9 | Marcelo Tosatti | |
640 | 55f8d6ac | Jan Kiszka | static void qemu_tcg_init_cpu_signals(void) |
641 | a8486bc9 | Marcelo Tosatti | { |
642 | 55f8d6ac | Jan Kiszka | sigset_t set; |
643 | 55f8d6ac | Jan Kiszka | struct sigaction sigact;
|
644 | a8486bc9 | Marcelo Tosatti | |
645 | 55f8d6ac | Jan Kiszka | memset(&sigact, 0, sizeof(sigact)); |
646 | 55f8d6ac | Jan Kiszka | sigact.sa_handler = cpu_signal; |
647 | 55f8d6ac | Jan Kiszka | sigaction(SIG_IPI, &sigact, NULL);
|
648 | a8486bc9 | Marcelo Tosatti | |
649 | 55f8d6ac | Jan Kiszka | sigemptyset(&set); |
650 | 55f8d6ac | Jan Kiszka | sigaddset(&set, SIG_IPI); |
651 | 55f8d6ac | Jan Kiszka | pthread_sigmask(SIG_UNBLOCK, &set, NULL);
|
652 | 55f8d6ac | Jan Kiszka | } |
653 | a8486bc9 | Marcelo Tosatti | |
654 | 55f8d6ac | Jan Kiszka | static sigset_t block_io_signals(void) |
655 | 55f8d6ac | Jan Kiszka | { |
656 | 55f8d6ac | Jan Kiszka | sigset_t set; |
657 | a8486bc9 | Marcelo Tosatti | |
658 | 55f8d6ac | Jan Kiszka | /* SIGUSR2 used by posix-aio-compat.c */
|
659 | 55f8d6ac | Jan Kiszka | sigemptyset(&set); |
660 | 55f8d6ac | Jan Kiszka | sigaddset(&set, SIGUSR2); |
661 | 55f8d6ac | Jan Kiszka | pthread_sigmask(SIG_UNBLOCK, &set, NULL);
|
662 | 55f8d6ac | Jan Kiszka | |
663 | 55f8d6ac | Jan Kiszka | sigemptyset(&set); |
664 | 55f8d6ac | Jan Kiszka | sigaddset(&set, SIGIO); |
665 | 55f8d6ac | Jan Kiszka | sigaddset(&set, SIGALRM); |
666 | 55f8d6ac | Jan Kiszka | sigaddset(&set, SIG_IPI); |
667 | 55f8d6ac | Jan Kiszka | sigaddset(&set, SIGBUS); |
668 | 55f8d6ac | Jan Kiszka | pthread_sigmask(SIG_BLOCK, &set, NULL);
|
669 | 55f8d6ac | Jan Kiszka | |
670 | 55f8d6ac | Jan Kiszka | return set;
|
671 | a8486bc9 | Marcelo Tosatti | } |
672 | 296af7c9 | Blue Swirl | |
673 | 296af7c9 | Blue Swirl | int qemu_init_main_loop(void) |
674 | 296af7c9 | Blue Swirl | { |
675 | 296af7c9 | Blue Swirl | int ret;
|
676 | a8486bc9 | Marcelo Tosatti | sigset_t blocked_signals; |
677 | 296af7c9 | Blue Swirl | |
678 | 6d9cb73c | Jan Kiszka | qemu_init_sigbus(); |
679 | 3c638d06 | Jan Kiszka | |
680 | a8486bc9 | Marcelo Tosatti | blocked_signals = block_io_signals(); |
681 | a8486bc9 | Marcelo Tosatti | |
682 | a8486bc9 | Marcelo Tosatti | ret = qemu_signalfd_init(blocked_signals); |
683 | 0ab07c62 | Jan Kiszka | if (ret) {
|
684 | a8486bc9 | Marcelo Tosatti | return ret;
|
685 | 0ab07c62 | Jan Kiszka | } |
686 | a8486bc9 | Marcelo Tosatti | |
687 | a8486bc9 | Marcelo Tosatti | /* Note eventfd must be drained before signalfd handlers run */
|
688 | 296af7c9 | Blue Swirl | ret = qemu_event_init(); |
689 | 0ab07c62 | Jan Kiszka | if (ret) {
|
690 | 296af7c9 | Blue Swirl | return ret;
|
691 | 0ab07c62 | Jan Kiszka | } |
692 | 296af7c9 | Blue Swirl | |
693 | ed94592b | Anthony Liguori | qemu_cond_init(&qemu_cpu_cond); |
694 | f8ca7b43 | Jan Kiszka | qemu_cond_init(&qemu_system_cond); |
695 | ed94592b | Anthony Liguori | qemu_cond_init(&qemu_pause_cond); |
696 | ed94592b | Anthony Liguori | qemu_cond_init(&qemu_work_cond); |
697 | 296af7c9 | Blue Swirl | qemu_mutex_init(&qemu_fair_mutex); |
698 | 296af7c9 | Blue Swirl | qemu_mutex_init(&qemu_global_mutex); |
699 | 296af7c9 | Blue Swirl | qemu_mutex_lock(&qemu_global_mutex); |
700 | 296af7c9 | Blue Swirl | |
701 | b7680cb6 | Jan Kiszka | qemu_thread_get_self(&io_thread); |
702 | 296af7c9 | Blue Swirl | |
703 | 296af7c9 | Blue Swirl | return 0; |
704 | 296af7c9 | Blue Swirl | } |
705 | 296af7c9 | Blue Swirl | |
706 | 7277e027 | Blue Swirl | void qemu_main_loop_start(void) |
707 | 7277e027 | Blue Swirl | { |
708 | 7277e027 | Blue Swirl | qemu_system_ready = 1;
|
709 | 7277e027 | Blue Swirl | qemu_cond_broadcast(&qemu_system_cond); |
710 | 7277e027 | Blue Swirl | } |
711 | 7277e027 | Blue Swirl | |
712 | e82bcec2 | Marcelo Tosatti | void run_on_cpu(CPUState *env, void (*func)(void *data), void *data) |
713 | e82bcec2 | Marcelo Tosatti | { |
714 | e82bcec2 | Marcelo Tosatti | struct qemu_work_item wi;
|
715 | e82bcec2 | Marcelo Tosatti | |
716 | b7680cb6 | Jan Kiszka | if (qemu_cpu_is_self(env)) {
|
717 | e82bcec2 | Marcelo Tosatti | func(data); |
718 | e82bcec2 | Marcelo Tosatti | return;
|
719 | e82bcec2 | Marcelo Tosatti | } |
720 | e82bcec2 | Marcelo Tosatti | |
721 | e82bcec2 | Marcelo Tosatti | wi.func = func; |
722 | e82bcec2 | Marcelo Tosatti | wi.data = data; |
723 | 0ab07c62 | Jan Kiszka | if (!env->queued_work_first) {
|
724 | e82bcec2 | Marcelo Tosatti | env->queued_work_first = &wi; |
725 | 0ab07c62 | Jan Kiszka | } else {
|
726 | e82bcec2 | Marcelo Tosatti | env->queued_work_last->next = &wi; |
727 | 0ab07c62 | Jan Kiszka | } |
728 | e82bcec2 | Marcelo Tosatti | env->queued_work_last = &wi; |
729 | e82bcec2 | Marcelo Tosatti | wi.next = NULL;
|
730 | e82bcec2 | Marcelo Tosatti | wi.done = false;
|
731 | e82bcec2 | Marcelo Tosatti | |
732 | e82bcec2 | Marcelo Tosatti | qemu_cpu_kick(env); |
733 | e82bcec2 | Marcelo Tosatti | while (!wi.done) {
|
734 | e82bcec2 | Marcelo Tosatti | CPUState *self_env = cpu_single_env; |
735 | e82bcec2 | Marcelo Tosatti | |
736 | e82bcec2 | Marcelo Tosatti | qemu_cond_wait(&qemu_work_cond, &qemu_global_mutex); |
737 | e82bcec2 | Marcelo Tosatti | cpu_single_env = self_env; |
738 | e82bcec2 | Marcelo Tosatti | } |
739 | e82bcec2 | Marcelo Tosatti | } |
740 | e82bcec2 | Marcelo Tosatti | |
741 | e82bcec2 | Marcelo Tosatti | static void flush_queued_work(CPUState *env) |
742 | e82bcec2 | Marcelo Tosatti | { |
743 | e82bcec2 | Marcelo Tosatti | struct qemu_work_item *wi;
|
744 | e82bcec2 | Marcelo Tosatti | |
745 | 0ab07c62 | Jan Kiszka | if (!env->queued_work_first) {
|
746 | e82bcec2 | Marcelo Tosatti | return;
|
747 | 0ab07c62 | Jan Kiszka | } |
748 | e82bcec2 | Marcelo Tosatti | |
749 | e82bcec2 | Marcelo Tosatti | while ((wi = env->queued_work_first)) {
|
750 | e82bcec2 | Marcelo Tosatti | env->queued_work_first = wi->next; |
751 | e82bcec2 | Marcelo Tosatti | wi->func(wi->data); |
752 | e82bcec2 | Marcelo Tosatti | wi->done = true;
|
753 | e82bcec2 | Marcelo Tosatti | } |
754 | e82bcec2 | Marcelo Tosatti | env->queued_work_last = NULL;
|
755 | e82bcec2 | Marcelo Tosatti | qemu_cond_broadcast(&qemu_work_cond); |
756 | e82bcec2 | Marcelo Tosatti | } |
757 | e82bcec2 | Marcelo Tosatti | |
758 | 296af7c9 | Blue Swirl | static void qemu_wait_io_event_common(CPUState *env) |
759 | 296af7c9 | Blue Swirl | { |
760 | 296af7c9 | Blue Swirl | if (env->stop) {
|
761 | 296af7c9 | Blue Swirl | env->stop = 0;
|
762 | 296af7c9 | Blue Swirl | env->stopped = 1;
|
763 | 296af7c9 | Blue Swirl | qemu_cond_signal(&qemu_pause_cond); |
764 | 296af7c9 | Blue Swirl | } |
765 | e82bcec2 | Marcelo Tosatti | flush_queued_work(env); |
766 | aa2c364b | Jan Kiszka | env->thread_kicked = false;
|
767 | 296af7c9 | Blue Swirl | } |
768 | 296af7c9 | Blue Swirl | |
769 | 6cabe1f3 | Jan Kiszka | static void qemu_tcg_wait_io_event(void) |
770 | 296af7c9 | Blue Swirl | { |
771 | 6cabe1f3 | Jan Kiszka | CPUState *env; |
772 | 6cabe1f3 | Jan Kiszka | |
773 | 16400322 | Jan Kiszka | while (all_cpu_threads_idle()) {
|
774 | 6cabe1f3 | Jan Kiszka | qemu_cond_timedwait(tcg_halt_cond, &qemu_global_mutex, 1000);
|
775 | 16400322 | Jan Kiszka | } |
776 | 296af7c9 | Blue Swirl | |
777 | 296af7c9 | Blue Swirl | qemu_mutex_unlock(&qemu_global_mutex); |
778 | 296af7c9 | Blue Swirl | |
779 | 296af7c9 | Blue Swirl | /*
|
780 | 296af7c9 | Blue Swirl | * Users of qemu_global_mutex can be starved, having no chance
|
781 | 296af7c9 | Blue Swirl | * to acquire it since this path will get to it first.
|
782 | 296af7c9 | Blue Swirl | * So use another lock to provide fairness.
|
783 | 296af7c9 | Blue Swirl | */
|
784 | 296af7c9 | Blue Swirl | qemu_mutex_lock(&qemu_fair_mutex); |
785 | 296af7c9 | Blue Swirl | qemu_mutex_unlock(&qemu_fair_mutex); |
786 | 296af7c9 | Blue Swirl | |
787 | 296af7c9 | Blue Swirl | qemu_mutex_lock(&qemu_global_mutex); |
788 | 6cabe1f3 | Jan Kiszka | |
789 | 6cabe1f3 | Jan Kiszka | for (env = first_cpu; env != NULL; env = env->next_cpu) { |
790 | 6cabe1f3 | Jan Kiszka | qemu_wait_io_event_common(env); |
791 | 6cabe1f3 | Jan Kiszka | } |
792 | 296af7c9 | Blue Swirl | } |
793 | 296af7c9 | Blue Swirl | |
794 | 296af7c9 | Blue Swirl | static void qemu_kvm_wait_io_event(CPUState *env) |
795 | 296af7c9 | Blue Swirl | { |
796 | 16400322 | Jan Kiszka | while (cpu_thread_is_idle(env)) {
|
797 | 296af7c9 | Blue Swirl | qemu_cond_timedwait(env->halt_cond, &qemu_global_mutex, 1000);
|
798 | 16400322 | Jan Kiszka | } |
799 | 296af7c9 | Blue Swirl | |
800 | 5db5bdac | Jan Kiszka | qemu_kvm_eat_signals(env); |
801 | 296af7c9 | Blue Swirl | qemu_wait_io_event_common(env); |
802 | 296af7c9 | Blue Swirl | } |
803 | 296af7c9 | Blue Swirl | |
804 | 7e97cd88 | Jan Kiszka | static void *qemu_kvm_cpu_thread_fn(void *arg) |
805 | 296af7c9 | Blue Swirl | { |
806 | 296af7c9 | Blue Swirl | CPUState *env = arg; |
807 | 84b4915d | Jan Kiszka | int r;
|
808 | 296af7c9 | Blue Swirl | |
809 | 6164e6d6 | Marcelo Tosatti | qemu_mutex_lock(&qemu_global_mutex); |
810 | b7680cb6 | Jan Kiszka | qemu_thread_get_self(env->thread); |
811 | 296af7c9 | Blue Swirl | |
812 | 84b4915d | Jan Kiszka | r = kvm_init_vcpu(env); |
813 | 84b4915d | Jan Kiszka | if (r < 0) { |
814 | 84b4915d | Jan Kiszka | fprintf(stderr, "kvm_init_vcpu failed: %s\n", strerror(-r));
|
815 | 84b4915d | Jan Kiszka | exit(1);
|
816 | 84b4915d | Jan Kiszka | } |
817 | 296af7c9 | Blue Swirl | |
818 | 55f8d6ac | Jan Kiszka | qemu_kvm_init_cpu_signals(env); |
819 | 296af7c9 | Blue Swirl | |
820 | 296af7c9 | Blue Swirl | /* signal CPU creation */
|
821 | 296af7c9 | Blue Swirl | env->created = 1;
|
822 | 296af7c9 | Blue Swirl | qemu_cond_signal(&qemu_cpu_cond); |
823 | 296af7c9 | Blue Swirl | |
824 | 296af7c9 | Blue Swirl | /* and wait for machine initialization */
|
825 | 0ab07c62 | Jan Kiszka | while (!qemu_system_ready) {
|
826 | 296af7c9 | Blue Swirl | qemu_cond_timedwait(&qemu_system_cond, &qemu_global_mutex, 100);
|
827 | 0ab07c62 | Jan Kiszka | } |
828 | 296af7c9 | Blue Swirl | |
829 | 296af7c9 | Blue Swirl | while (1) { |
830 | 0ab07c62 | Jan Kiszka | if (cpu_can_run(env)) {
|
831 | 6792a57b | Jan Kiszka | r = kvm_cpu_exec(env); |
832 | 83f338f7 | Jan Kiszka | if (r == EXCP_DEBUG) {
|
833 | 83f338f7 | Jan Kiszka | cpu_handle_debug_exception(env); |
834 | 83f338f7 | Jan Kiszka | } |
835 | 0ab07c62 | Jan Kiszka | } |
836 | 296af7c9 | Blue Swirl | qemu_kvm_wait_io_event(env); |
837 | 296af7c9 | Blue Swirl | } |
838 | 296af7c9 | Blue Swirl | |
839 | 296af7c9 | Blue Swirl | return NULL; |
840 | 296af7c9 | Blue Swirl | } |
841 | 296af7c9 | Blue Swirl | |
842 | 7e97cd88 | Jan Kiszka | static void *qemu_tcg_cpu_thread_fn(void *arg) |
843 | 296af7c9 | Blue Swirl | { |
844 | 296af7c9 | Blue Swirl | CPUState *env = arg; |
845 | 296af7c9 | Blue Swirl | |
846 | 55f8d6ac | Jan Kiszka | qemu_tcg_init_cpu_signals(); |
847 | b7680cb6 | Jan Kiszka | qemu_thread_get_self(env->thread); |
848 | 296af7c9 | Blue Swirl | |
849 | 296af7c9 | Blue Swirl | /* signal CPU creation */
|
850 | 296af7c9 | Blue Swirl | qemu_mutex_lock(&qemu_global_mutex); |
851 | 0ab07c62 | Jan Kiszka | for (env = first_cpu; env != NULL; env = env->next_cpu) { |
852 | 296af7c9 | Blue Swirl | env->created = 1;
|
853 | 0ab07c62 | Jan Kiszka | } |
854 | 296af7c9 | Blue Swirl | qemu_cond_signal(&qemu_cpu_cond); |
855 | 296af7c9 | Blue Swirl | |
856 | 296af7c9 | Blue Swirl | /* and wait for machine initialization */
|
857 | 0ab07c62 | Jan Kiszka | while (!qemu_system_ready) {
|
858 | 296af7c9 | Blue Swirl | qemu_cond_timedwait(&qemu_system_cond, &qemu_global_mutex, 100);
|
859 | 0ab07c62 | Jan Kiszka | } |
860 | 296af7c9 | Blue Swirl | |
861 | 296af7c9 | Blue Swirl | while (1) { |
862 | 472fb0c4 | Jan Kiszka | cpu_exec_all(); |
863 | 6cabe1f3 | Jan Kiszka | qemu_tcg_wait_io_event(); |
864 | 296af7c9 | Blue Swirl | } |
865 | 296af7c9 | Blue Swirl | |
866 | 296af7c9 | Blue Swirl | return NULL; |
867 | 296af7c9 | Blue Swirl | } |
868 | 296af7c9 | Blue Swirl | |
869 | 296af7c9 | Blue Swirl | void qemu_cpu_kick(void *_env) |
870 | 296af7c9 | Blue Swirl | { |
871 | 296af7c9 | Blue Swirl | CPUState *env = _env; |
872 | 296af7c9 | Blue Swirl | |
873 | 296af7c9 | Blue Swirl | qemu_cond_broadcast(env->halt_cond); |
874 | aa2c364b | Jan Kiszka | if (!env->thread_kicked) {
|
875 | aa2c364b | Jan Kiszka | qemu_thread_signal(env->thread, SIG_IPI); |
876 | aa2c364b | Jan Kiszka | env->thread_kicked = true;
|
877 | aa2c364b | Jan Kiszka | } |
878 | 296af7c9 | Blue Swirl | } |
879 | 296af7c9 | Blue Swirl | |
880 | 46d62fac | Jan Kiszka | void qemu_cpu_kick_self(void) |
881 | 296af7c9 | Blue Swirl | { |
882 | 46d62fac | Jan Kiszka | assert(cpu_single_env); |
883 | 296af7c9 | Blue Swirl | |
884 | 46d62fac | Jan Kiszka | if (!cpu_single_env->thread_kicked) {
|
885 | 46d62fac | Jan Kiszka | qemu_thread_signal(cpu_single_env->thread, SIG_IPI); |
886 | 46d62fac | Jan Kiszka | cpu_single_env->thread_kicked = true;
|
887 | 296af7c9 | Blue Swirl | } |
888 | 296af7c9 | Blue Swirl | } |
889 | 296af7c9 | Blue Swirl | |
890 | b7680cb6 | Jan Kiszka | int qemu_cpu_is_self(void *_env) |
891 | 296af7c9 | Blue Swirl | { |
892 | 296af7c9 | Blue Swirl | CPUState *env = _env; |
893 | a8486bc9 | Marcelo Tosatti | |
894 | b7680cb6 | Jan Kiszka | return qemu_thread_is_self(env->thread);
|
895 | 296af7c9 | Blue Swirl | } |
896 | 296af7c9 | Blue Swirl | |
897 | 296af7c9 | Blue Swirl | void qemu_mutex_lock_iothread(void) |
898 | 296af7c9 | Blue Swirl | { |
899 | 296af7c9 | Blue Swirl | if (kvm_enabled()) {
|
900 | 296af7c9 | Blue Swirl | qemu_mutex_lock(&qemu_global_mutex); |
901 | 1a28cac3 | Marcelo Tosatti | } else {
|
902 | 1a28cac3 | Marcelo Tosatti | qemu_mutex_lock(&qemu_fair_mutex); |
903 | 1a28cac3 | Marcelo Tosatti | if (qemu_mutex_trylock(&qemu_global_mutex)) {
|
904 | 1a28cac3 | Marcelo Tosatti | qemu_thread_signal(tcg_cpu_thread, SIG_IPI); |
905 | 1a28cac3 | Marcelo Tosatti | qemu_mutex_lock(&qemu_global_mutex); |
906 | 1a28cac3 | Marcelo Tosatti | } |
907 | 1a28cac3 | Marcelo Tosatti | qemu_mutex_unlock(&qemu_fair_mutex); |
908 | 1a28cac3 | Marcelo Tosatti | } |
909 | 296af7c9 | Blue Swirl | } |
910 | 296af7c9 | Blue Swirl | |
911 | 296af7c9 | Blue Swirl | void qemu_mutex_unlock_iothread(void) |
912 | 296af7c9 | Blue Swirl | { |
913 | 296af7c9 | Blue Swirl | qemu_mutex_unlock(&qemu_global_mutex); |
914 | 296af7c9 | Blue Swirl | } |
915 | 296af7c9 | Blue Swirl | |
916 | 296af7c9 | Blue Swirl | static int all_vcpus_paused(void) |
917 | 296af7c9 | Blue Swirl | { |
918 | 296af7c9 | Blue Swirl | CPUState *penv = first_cpu; |
919 | 296af7c9 | Blue Swirl | |
920 | 296af7c9 | Blue Swirl | while (penv) {
|
921 | 0ab07c62 | Jan Kiszka | if (!penv->stopped) {
|
922 | 296af7c9 | Blue Swirl | return 0; |
923 | 0ab07c62 | Jan Kiszka | } |
924 | 296af7c9 | Blue Swirl | penv = (CPUState *)penv->next_cpu; |
925 | 296af7c9 | Blue Swirl | } |
926 | 296af7c9 | Blue Swirl | |
927 | 296af7c9 | Blue Swirl | return 1; |
928 | 296af7c9 | Blue Swirl | } |
929 | 296af7c9 | Blue Swirl | |
930 | 296af7c9 | Blue Swirl | void pause_all_vcpus(void) |
931 | 296af7c9 | Blue Swirl | { |
932 | 296af7c9 | Blue Swirl | CPUState *penv = first_cpu; |
933 | 296af7c9 | Blue Swirl | |
934 | 296af7c9 | Blue Swirl | while (penv) {
|
935 | 296af7c9 | Blue Swirl | penv->stop = 1;
|
936 | 296af7c9 | Blue Swirl | qemu_cpu_kick(penv); |
937 | 296af7c9 | Blue Swirl | penv = (CPUState *)penv->next_cpu; |
938 | 296af7c9 | Blue Swirl | } |
939 | 296af7c9 | Blue Swirl | |
940 | 296af7c9 | Blue Swirl | while (!all_vcpus_paused()) {
|
941 | 296af7c9 | Blue Swirl | qemu_cond_timedwait(&qemu_pause_cond, &qemu_global_mutex, 100);
|
942 | 296af7c9 | Blue Swirl | penv = first_cpu; |
943 | 296af7c9 | Blue Swirl | while (penv) {
|
944 | 1fbb22e5 | Marcelo Tosatti | qemu_cpu_kick(penv); |
945 | 296af7c9 | Blue Swirl | penv = (CPUState *)penv->next_cpu; |
946 | 296af7c9 | Blue Swirl | } |
947 | 296af7c9 | Blue Swirl | } |
948 | 296af7c9 | Blue Swirl | } |
949 | 296af7c9 | Blue Swirl | |
950 | 296af7c9 | Blue Swirl | void resume_all_vcpus(void) |
951 | 296af7c9 | Blue Swirl | { |
952 | 296af7c9 | Blue Swirl | CPUState *penv = first_cpu; |
953 | 296af7c9 | Blue Swirl | |
954 | 296af7c9 | Blue Swirl | while (penv) {
|
955 | 296af7c9 | Blue Swirl | penv->stop = 0;
|
956 | 296af7c9 | Blue Swirl | penv->stopped = 0;
|
957 | 296af7c9 | Blue Swirl | qemu_cpu_kick(penv); |
958 | 296af7c9 | Blue Swirl | penv = (CPUState *)penv->next_cpu; |
959 | 296af7c9 | Blue Swirl | } |
960 | 296af7c9 | Blue Swirl | } |
961 | 296af7c9 | Blue Swirl | |
962 | 7e97cd88 | Jan Kiszka | static void qemu_tcg_init_vcpu(void *_env) |
963 | 296af7c9 | Blue Swirl | { |
964 | 296af7c9 | Blue Swirl | CPUState *env = _env; |
965 | 0ab07c62 | Jan Kiszka | |
966 | 296af7c9 | Blue Swirl | /* share a single thread for all cpus with TCG */
|
967 | 296af7c9 | Blue Swirl | if (!tcg_cpu_thread) {
|
968 | 296af7c9 | Blue Swirl | env->thread = qemu_mallocz(sizeof(QemuThread));
|
969 | 296af7c9 | Blue Swirl | env->halt_cond = qemu_mallocz(sizeof(QemuCond));
|
970 | 296af7c9 | Blue Swirl | qemu_cond_init(env->halt_cond); |
971 | 7e97cd88 | Jan Kiszka | qemu_thread_create(env->thread, qemu_tcg_cpu_thread_fn, env); |
972 | 0ab07c62 | Jan Kiszka | while (env->created == 0) { |
973 | 296af7c9 | Blue Swirl | qemu_cond_timedwait(&qemu_cpu_cond, &qemu_global_mutex, 100);
|
974 | 0ab07c62 | Jan Kiszka | } |
975 | 296af7c9 | Blue Swirl | tcg_cpu_thread = env->thread; |
976 | 296af7c9 | Blue Swirl | tcg_halt_cond = env->halt_cond; |
977 | 296af7c9 | Blue Swirl | } else {
|
978 | 296af7c9 | Blue Swirl | env->thread = tcg_cpu_thread; |
979 | 296af7c9 | Blue Swirl | env->halt_cond = tcg_halt_cond; |
980 | 296af7c9 | Blue Swirl | } |
981 | 296af7c9 | Blue Swirl | } |
982 | 296af7c9 | Blue Swirl | |
983 | 7e97cd88 | Jan Kiszka | static void qemu_kvm_start_vcpu(CPUState *env) |
984 | 296af7c9 | Blue Swirl | { |
985 | 296af7c9 | Blue Swirl | env->thread = qemu_mallocz(sizeof(QemuThread));
|
986 | 296af7c9 | Blue Swirl | env->halt_cond = qemu_mallocz(sizeof(QemuCond));
|
987 | 296af7c9 | Blue Swirl | qemu_cond_init(env->halt_cond); |
988 | 7e97cd88 | Jan Kiszka | qemu_thread_create(env->thread, qemu_kvm_cpu_thread_fn, env); |
989 | 0ab07c62 | Jan Kiszka | while (env->created == 0) { |
990 | 296af7c9 | Blue Swirl | qemu_cond_timedwait(&qemu_cpu_cond, &qemu_global_mutex, 100);
|
991 | 0ab07c62 | Jan Kiszka | } |
992 | 296af7c9 | Blue Swirl | } |
993 | 296af7c9 | Blue Swirl | |
994 | 296af7c9 | Blue Swirl | void qemu_init_vcpu(void *_env) |
995 | 296af7c9 | Blue Swirl | { |
996 | 296af7c9 | Blue Swirl | CPUState *env = _env; |
997 | 296af7c9 | Blue Swirl | |
998 | 296af7c9 | Blue Swirl | env->nr_cores = smp_cores; |
999 | 296af7c9 | Blue Swirl | env->nr_threads = smp_threads; |
1000 | 0ab07c62 | Jan Kiszka | if (kvm_enabled()) {
|
1001 | 7e97cd88 | Jan Kiszka | qemu_kvm_start_vcpu(env); |
1002 | 0ab07c62 | Jan Kiszka | } else {
|
1003 | 7e97cd88 | Jan Kiszka | qemu_tcg_init_vcpu(env); |
1004 | 0ab07c62 | Jan Kiszka | } |
1005 | 296af7c9 | Blue Swirl | } |
1006 | 296af7c9 | Blue Swirl | |
1007 | 296af7c9 | Blue Swirl | void qemu_notify_event(void) |
1008 | 296af7c9 | Blue Swirl | { |
1009 | 296af7c9 | Blue Swirl | qemu_event_increment(); |
1010 | 296af7c9 | Blue Swirl | } |
1011 | 296af7c9 | Blue Swirl | |
1012 | b4a3d965 | Jan Kiszka | void cpu_stop_current(void) |
1013 | 296af7c9 | Blue Swirl | { |
1014 | b4a3d965 | Jan Kiszka | if (cpu_single_env) {
|
1015 | 67bb172f | Paolo Bonzini | cpu_single_env->stop = 0;
|
1016 | b4a3d965 | Jan Kiszka | cpu_single_env->stopped = 1;
|
1017 | b4a3d965 | Jan Kiszka | cpu_exit(cpu_single_env); |
1018 | 67bb172f | Paolo Bonzini | qemu_cond_signal(&qemu_pause_cond); |
1019 | b4a3d965 | Jan Kiszka | } |
1020 | 296af7c9 | Blue Swirl | } |
1021 | 296af7c9 | Blue Swirl | |
1022 | 296af7c9 | Blue Swirl | void vm_stop(int reason) |
1023 | 296af7c9 | Blue Swirl | { |
1024 | b7680cb6 | Jan Kiszka | if (!qemu_thread_is_self(&io_thread)) {
|
1025 | 296af7c9 | Blue Swirl | qemu_system_vmstop_request(reason); |
1026 | 296af7c9 | Blue Swirl | /*
|
1027 | 296af7c9 | Blue Swirl | * FIXME: should not return to device code in case
|
1028 | 296af7c9 | Blue Swirl | * vm_stop() has been requested.
|
1029 | 296af7c9 | Blue Swirl | */
|
1030 | b4a3d965 | Jan Kiszka | cpu_stop_current(); |
1031 | 296af7c9 | Blue Swirl | return;
|
1032 | 296af7c9 | Blue Swirl | } |
1033 | 296af7c9 | Blue Swirl | do_vm_stop(reason); |
1034 | 296af7c9 | Blue Swirl | } |
1035 | 296af7c9 | Blue Swirl | |
1036 | 296af7c9 | Blue Swirl | #endif
|
1037 | 296af7c9 | Blue Swirl | |
1038 | 6792a57b | Jan Kiszka | static int tcg_cpu_exec(CPUState *env) |
1039 | 296af7c9 | Blue Swirl | { |
1040 | 296af7c9 | Blue Swirl | int ret;
|
1041 | 296af7c9 | Blue Swirl | #ifdef CONFIG_PROFILER
|
1042 | 296af7c9 | Blue Swirl | int64_t ti; |
1043 | 296af7c9 | Blue Swirl | #endif
|
1044 | 296af7c9 | Blue Swirl | |
1045 | 296af7c9 | Blue Swirl | #ifdef CONFIG_PROFILER
|
1046 | 296af7c9 | Blue Swirl | ti = profile_getclock(); |
1047 | 296af7c9 | Blue Swirl | #endif
|
1048 | 296af7c9 | Blue Swirl | if (use_icount) {
|
1049 | 296af7c9 | Blue Swirl | int64_t count; |
1050 | 296af7c9 | Blue Swirl | int decr;
|
1051 | 296af7c9 | Blue Swirl | qemu_icount -= (env->icount_decr.u16.low + env->icount_extra); |
1052 | 296af7c9 | Blue Swirl | env->icount_decr.u16.low = 0;
|
1053 | 296af7c9 | Blue Swirl | env->icount_extra = 0;
|
1054 | 296af7c9 | Blue Swirl | count = qemu_icount_round (qemu_next_deadline()); |
1055 | 296af7c9 | Blue Swirl | qemu_icount += count; |
1056 | 296af7c9 | Blue Swirl | decr = (count > 0xffff) ? 0xffff : count; |
1057 | 296af7c9 | Blue Swirl | count -= decr; |
1058 | 296af7c9 | Blue Swirl | env->icount_decr.u16.low = decr; |
1059 | 296af7c9 | Blue Swirl | env->icount_extra = count; |
1060 | 296af7c9 | Blue Swirl | } |
1061 | 296af7c9 | Blue Swirl | ret = cpu_exec(env); |
1062 | 296af7c9 | Blue Swirl | #ifdef CONFIG_PROFILER
|
1063 | 296af7c9 | Blue Swirl | qemu_time += profile_getclock() - ti; |
1064 | 296af7c9 | Blue Swirl | #endif
|
1065 | 296af7c9 | Blue Swirl | if (use_icount) {
|
1066 | 296af7c9 | Blue Swirl | /* Fold pending instructions back into the
|
1067 | 296af7c9 | Blue Swirl | instruction counter, and clear the interrupt flag. */
|
1068 | 296af7c9 | Blue Swirl | qemu_icount -= (env->icount_decr.u16.low |
1069 | 296af7c9 | Blue Swirl | + env->icount_extra); |
1070 | 296af7c9 | Blue Swirl | env->icount_decr.u32 = 0;
|
1071 | 296af7c9 | Blue Swirl | env->icount_extra = 0;
|
1072 | 296af7c9 | Blue Swirl | } |
1073 | 296af7c9 | Blue Swirl | return ret;
|
1074 | 296af7c9 | Blue Swirl | } |
1075 | 296af7c9 | Blue Swirl | |
1076 | 472fb0c4 | Jan Kiszka | bool cpu_exec_all(void) |
1077 | 296af7c9 | Blue Swirl | { |
1078 | 9a36085b | Jan Kiszka | int r;
|
1079 | 9a36085b | Jan Kiszka | |
1080 | 0ab07c62 | Jan Kiszka | if (next_cpu == NULL) { |
1081 | 296af7c9 | Blue Swirl | next_cpu = first_cpu; |
1082 | 0ab07c62 | Jan Kiszka | } |
1083 | c629a4bc | Jan Kiszka | for (; next_cpu != NULL && !exit_request; next_cpu = next_cpu->next_cpu) { |
1084 | 345f4426 | Jan Kiszka | CPUState *env = next_cpu; |
1085 | 296af7c9 | Blue Swirl | |
1086 | 296af7c9 | Blue Swirl | qemu_clock_enable(vm_clock, |
1087 | 345f4426 | Jan Kiszka | (env->singlestep_enabled & SSTEP_NOTIMER) == 0);
|
1088 | 296af7c9 | Blue Swirl | |
1089 | 0ab07c62 | Jan Kiszka | if (qemu_alarm_pending()) {
|
1090 | 296af7c9 | Blue Swirl | break;
|
1091 | 0ab07c62 | Jan Kiszka | } |
1092 | 3c638d06 | Jan Kiszka | if (cpu_can_run(env)) {
|
1093 | 9a36085b | Jan Kiszka | if (kvm_enabled()) {
|
1094 | 6792a57b | Jan Kiszka | r = kvm_cpu_exec(env); |
1095 | 9a36085b | Jan Kiszka | qemu_kvm_eat_signals(env); |
1096 | 6792a57b | Jan Kiszka | } else {
|
1097 | 6792a57b | Jan Kiszka | r = tcg_cpu_exec(env); |
1098 | 9a36085b | Jan Kiszka | } |
1099 | 9a36085b | Jan Kiszka | if (r == EXCP_DEBUG) {
|
1100 | 83f338f7 | Jan Kiszka | cpu_handle_debug_exception(env); |
1101 | 3c638d06 | Jan Kiszka | break;
|
1102 | 3c638d06 | Jan Kiszka | } |
1103 | df646dfd | Paolo Bonzini | } else if (env->stop || env->stopped) { |
1104 | 296af7c9 | Blue Swirl | break;
|
1105 | 296af7c9 | Blue Swirl | } |
1106 | 296af7c9 | Blue Swirl | } |
1107 | c629a4bc | Jan Kiszka | exit_request = 0;
|
1108 | 16400322 | Jan Kiszka | return !all_cpu_threads_idle();
|
1109 | 296af7c9 | Blue Swirl | } |
1110 | 296af7c9 | Blue Swirl | |
1111 | 296af7c9 | Blue Swirl | void set_numa_modes(void) |
1112 | 296af7c9 | Blue Swirl | { |
1113 | 296af7c9 | Blue Swirl | CPUState *env; |
1114 | 296af7c9 | Blue Swirl | int i;
|
1115 | 296af7c9 | Blue Swirl | |
1116 | 296af7c9 | Blue Swirl | for (env = first_cpu; env != NULL; env = env->next_cpu) { |
1117 | 296af7c9 | Blue Swirl | for (i = 0; i < nb_numa_nodes; i++) { |
1118 | 296af7c9 | Blue Swirl | if (node_cpumask[i] & (1 << env->cpu_index)) { |
1119 | 296af7c9 | Blue Swirl | env->numa_node = i; |
1120 | 296af7c9 | Blue Swirl | } |
1121 | 296af7c9 | Blue Swirl | } |
1122 | 296af7c9 | Blue Swirl | } |
1123 | 296af7c9 | Blue Swirl | } |
1124 | 296af7c9 | Blue Swirl | |
1125 | 296af7c9 | Blue Swirl | void set_cpu_log(const char *optarg) |
1126 | 296af7c9 | Blue Swirl | { |
1127 | 296af7c9 | Blue Swirl | int mask;
|
1128 | 296af7c9 | Blue Swirl | const CPULogItem *item;
|
1129 | 296af7c9 | Blue Swirl | |
1130 | 296af7c9 | Blue Swirl | mask = cpu_str_to_log_mask(optarg); |
1131 | 296af7c9 | Blue Swirl | if (!mask) {
|
1132 | 296af7c9 | Blue Swirl | printf("Log items (comma separated):\n");
|
1133 | 296af7c9 | Blue Swirl | for (item = cpu_log_items; item->mask != 0; item++) { |
1134 | 296af7c9 | Blue Swirl | printf("%-10s %s\n", item->name, item->help);
|
1135 | 296af7c9 | Blue Swirl | } |
1136 | 296af7c9 | Blue Swirl | exit(1);
|
1137 | 296af7c9 | Blue Swirl | } |
1138 | 296af7c9 | Blue Swirl | cpu_set_log(mask); |
1139 | 296af7c9 | Blue Swirl | } |
1140 | 29e922b6 | Blue Swirl | |
1141 | 29e922b6 | Blue Swirl | /* Return the virtual CPU time, based on the instruction counter. */
|
1142 | 29e922b6 | Blue Swirl | int64_t cpu_get_icount(void)
|
1143 | 29e922b6 | Blue Swirl | { |
1144 | 29e922b6 | Blue Swirl | int64_t icount; |
1145 | 29e922b6 | Blue Swirl | CPUState *env = cpu_single_env;; |
1146 | 29e922b6 | Blue Swirl | |
1147 | 29e922b6 | Blue Swirl | icount = qemu_icount; |
1148 | 29e922b6 | Blue Swirl | if (env) {
|
1149 | 29e922b6 | Blue Swirl | if (!can_do_io(env)) {
|
1150 | 29e922b6 | Blue Swirl | fprintf(stderr, "Bad clock read\n");
|
1151 | 29e922b6 | Blue Swirl | } |
1152 | 29e922b6 | Blue Swirl | icount -= (env->icount_decr.u16.low + env->icount_extra); |
1153 | 29e922b6 | Blue Swirl | } |
1154 | 29e922b6 | Blue Swirl | return qemu_icount_bias + (icount << icount_time_shift);
|
1155 | 29e922b6 | Blue Swirl | } |
1156 | 262353cb | Blue Swirl | |
1157 | 9a78eead | Stefan Weil | void list_cpus(FILE *f, fprintf_function cpu_fprintf, const char *optarg) |
1158 | 262353cb | Blue Swirl | { |
1159 | 262353cb | Blue Swirl | /* XXX: implement xxx_cpu_list for targets that still miss it */
|
1160 | 262353cb | Blue Swirl | #if defined(cpu_list_id)
|
1161 | 262353cb | Blue Swirl | cpu_list_id(f, cpu_fprintf, optarg); |
1162 | 262353cb | Blue Swirl | #elif defined(cpu_list)
|
1163 | 262353cb | Blue Swirl | cpu_list(f, cpu_fprintf); /* deprecated */
|
1164 | 262353cb | Blue Swirl | #endif
|
1165 | 262353cb | Blue Swirl | } |