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1 | db1a4972 | Paolo Bonzini | /*
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2 | db1a4972 | Paolo Bonzini | * QEMU System Emulator
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3 | db1a4972 | Paolo Bonzini | *
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4 | db1a4972 | Paolo Bonzini | * Copyright (c) 2003-2008 Fabrice Bellard
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5 | db1a4972 | Paolo Bonzini | *
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6 | db1a4972 | Paolo Bonzini | * Permission is hereby granted, free of charge, to any person obtaining a copy
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7 | db1a4972 | Paolo Bonzini | * of this software and associated documentation files (the "Software"), to deal
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8 | db1a4972 | Paolo Bonzini | * in the Software without restriction, including without limitation the rights
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9 | db1a4972 | Paolo Bonzini | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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10 | db1a4972 | Paolo Bonzini | * copies of the Software, and to permit persons to whom the Software is
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11 | db1a4972 | Paolo Bonzini | * furnished to do so, subject to the following conditions:
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12 | db1a4972 | Paolo Bonzini | *
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13 | db1a4972 | Paolo Bonzini | * The above copyright notice and this permission notice shall be included in
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14 | db1a4972 | Paolo Bonzini | * all copies or substantial portions of the Software.
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15 | db1a4972 | Paolo Bonzini | *
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16 | db1a4972 | Paolo Bonzini | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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17 | db1a4972 | Paolo Bonzini | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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18 | db1a4972 | Paolo Bonzini | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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19 | db1a4972 | Paolo Bonzini | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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20 | db1a4972 | Paolo Bonzini | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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21 | db1a4972 | Paolo Bonzini | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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22 | db1a4972 | Paolo Bonzini | * THE SOFTWARE.
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23 | db1a4972 | Paolo Bonzini | */
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24 | db1a4972 | Paolo Bonzini | |
25 | db1a4972 | Paolo Bonzini | #include "sysemu.h" |
26 | db1a4972 | Paolo Bonzini | #include "net.h" |
27 | db1a4972 | Paolo Bonzini | #include "monitor.h" |
28 | db1a4972 | Paolo Bonzini | #include "console.h" |
29 | db1a4972 | Paolo Bonzini | |
30 | db1a4972 | Paolo Bonzini | #include "hw/hw.h" |
31 | db1a4972 | Paolo Bonzini | |
32 | db1a4972 | Paolo Bonzini | #include <unistd.h> |
33 | db1a4972 | Paolo Bonzini | #include <fcntl.h> |
34 | db1a4972 | Paolo Bonzini | #include <time.h> |
35 | db1a4972 | Paolo Bonzini | #include <errno.h> |
36 | db1a4972 | Paolo Bonzini | #include <sys/time.h> |
37 | db1a4972 | Paolo Bonzini | #include <signal.h> |
38 | 44459349 | Juergen Lock | #ifdef __FreeBSD__
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39 | 44459349 | Juergen Lock | #include <sys/param.h> |
40 | 44459349 | Juergen Lock | #endif
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41 | db1a4972 | Paolo Bonzini | |
42 | db1a4972 | Paolo Bonzini | #ifdef _WIN32
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43 | db1a4972 | Paolo Bonzini | #include <windows.h> |
44 | db1a4972 | Paolo Bonzini | #include <mmsystem.h> |
45 | db1a4972 | Paolo Bonzini | #endif
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46 | db1a4972 | Paolo Bonzini | |
47 | db1a4972 | Paolo Bonzini | #include "qemu-timer.h" |
48 | db1a4972 | Paolo Bonzini | |
49 | db1a4972 | Paolo Bonzini | /* Conversion factor from emulated instructions to virtual clock ticks. */
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50 | 29e922b6 | Blue Swirl | int icount_time_shift;
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51 | db1a4972 | Paolo Bonzini | /* Arbitrarily pick 1MIPS as the minimum allowable speed. */
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52 | db1a4972 | Paolo Bonzini | #define MAX_ICOUNT_SHIFT 10 |
53 | db1a4972 | Paolo Bonzini | /* Compensate for varying guest execution speed. */
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54 | 29e922b6 | Blue Swirl | int64_t qemu_icount_bias; |
55 | db1a4972 | Paolo Bonzini | static QEMUTimer *icount_rt_timer;
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56 | db1a4972 | Paolo Bonzini | static QEMUTimer *icount_vm_timer;
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57 | db1a4972 | Paolo Bonzini | |
58 | db1a4972 | Paolo Bonzini | /***********************************************************/
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59 | db1a4972 | Paolo Bonzini | /* guest cycle counter */
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60 | db1a4972 | Paolo Bonzini | |
61 | db1a4972 | Paolo Bonzini | typedef struct TimersState { |
62 | db1a4972 | Paolo Bonzini | int64_t cpu_ticks_prev; |
63 | db1a4972 | Paolo Bonzini | int64_t cpu_ticks_offset; |
64 | db1a4972 | Paolo Bonzini | int64_t cpu_clock_offset; |
65 | db1a4972 | Paolo Bonzini | int32_t cpu_ticks_enabled; |
66 | db1a4972 | Paolo Bonzini | int64_t dummy; |
67 | db1a4972 | Paolo Bonzini | } TimersState; |
68 | db1a4972 | Paolo Bonzini | |
69 | db1a4972 | Paolo Bonzini | TimersState timers_state; |
70 | db1a4972 | Paolo Bonzini | |
71 | db1a4972 | Paolo Bonzini | /* return the host CPU cycle counter and handle stop/restart */
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72 | db1a4972 | Paolo Bonzini | int64_t cpu_get_ticks(void)
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73 | db1a4972 | Paolo Bonzini | { |
74 | db1a4972 | Paolo Bonzini | if (use_icount) {
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75 | db1a4972 | Paolo Bonzini | return cpu_get_icount();
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76 | db1a4972 | Paolo Bonzini | } |
77 | db1a4972 | Paolo Bonzini | if (!timers_state.cpu_ticks_enabled) {
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78 | db1a4972 | Paolo Bonzini | return timers_state.cpu_ticks_offset;
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79 | db1a4972 | Paolo Bonzini | } else {
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80 | db1a4972 | Paolo Bonzini | int64_t ticks; |
81 | db1a4972 | Paolo Bonzini | ticks = cpu_get_real_ticks(); |
82 | db1a4972 | Paolo Bonzini | if (timers_state.cpu_ticks_prev > ticks) {
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83 | db1a4972 | Paolo Bonzini | /* Note: non increasing ticks may happen if the host uses
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84 | db1a4972 | Paolo Bonzini | software suspend */
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85 | db1a4972 | Paolo Bonzini | timers_state.cpu_ticks_offset += timers_state.cpu_ticks_prev - ticks; |
86 | db1a4972 | Paolo Bonzini | } |
87 | db1a4972 | Paolo Bonzini | timers_state.cpu_ticks_prev = ticks; |
88 | db1a4972 | Paolo Bonzini | return ticks + timers_state.cpu_ticks_offset;
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89 | db1a4972 | Paolo Bonzini | } |
90 | db1a4972 | Paolo Bonzini | } |
91 | db1a4972 | Paolo Bonzini | |
92 | db1a4972 | Paolo Bonzini | /* return the host CPU monotonic timer and handle stop/restart */
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93 | db1a4972 | Paolo Bonzini | static int64_t cpu_get_clock(void) |
94 | db1a4972 | Paolo Bonzini | { |
95 | db1a4972 | Paolo Bonzini | int64_t ti; |
96 | db1a4972 | Paolo Bonzini | if (!timers_state.cpu_ticks_enabled) {
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97 | db1a4972 | Paolo Bonzini | return timers_state.cpu_clock_offset;
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98 | db1a4972 | Paolo Bonzini | } else {
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99 | db1a4972 | Paolo Bonzini | ti = get_clock(); |
100 | db1a4972 | Paolo Bonzini | return ti + timers_state.cpu_clock_offset;
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101 | db1a4972 | Paolo Bonzini | } |
102 | db1a4972 | Paolo Bonzini | } |
103 | db1a4972 | Paolo Bonzini | |
104 | 1ece93a9 | Paolo Bonzini | #ifndef CONFIG_IOTHREAD
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105 | db1a4972 | Paolo Bonzini | static int64_t qemu_icount_delta(void) |
106 | db1a4972 | Paolo Bonzini | { |
107 | 1ece93a9 | Paolo Bonzini | if (!use_icount) {
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108 | 1ece93a9 | Paolo Bonzini | return 5000 * (int64_t) 1000000; |
109 | 1ece93a9 | Paolo Bonzini | } else if (use_icount == 1) { |
110 | db1a4972 | Paolo Bonzini | /* When not using an adaptive execution frequency
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111 | db1a4972 | Paolo Bonzini | we tend to get badly out of sync with real time,
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112 | db1a4972 | Paolo Bonzini | so just delay for a reasonable amount of time. */
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113 | db1a4972 | Paolo Bonzini | return 0; |
114 | db1a4972 | Paolo Bonzini | } else {
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115 | db1a4972 | Paolo Bonzini | return cpu_get_icount() - cpu_get_clock();
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116 | db1a4972 | Paolo Bonzini | } |
117 | db1a4972 | Paolo Bonzini | } |
118 | 1ece93a9 | Paolo Bonzini | #endif
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119 | db1a4972 | Paolo Bonzini | |
120 | db1a4972 | Paolo Bonzini | /* enable cpu_get_ticks() */
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121 | db1a4972 | Paolo Bonzini | void cpu_enable_ticks(void) |
122 | db1a4972 | Paolo Bonzini | { |
123 | db1a4972 | Paolo Bonzini | if (!timers_state.cpu_ticks_enabled) {
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124 | db1a4972 | Paolo Bonzini | timers_state.cpu_ticks_offset -= cpu_get_real_ticks(); |
125 | db1a4972 | Paolo Bonzini | timers_state.cpu_clock_offset -= get_clock(); |
126 | db1a4972 | Paolo Bonzini | timers_state.cpu_ticks_enabled = 1;
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127 | db1a4972 | Paolo Bonzini | } |
128 | db1a4972 | Paolo Bonzini | } |
129 | db1a4972 | Paolo Bonzini | |
130 | db1a4972 | Paolo Bonzini | /* disable cpu_get_ticks() : the clock is stopped. You must not call
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131 | db1a4972 | Paolo Bonzini | cpu_get_ticks() after that. */
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132 | db1a4972 | Paolo Bonzini | void cpu_disable_ticks(void) |
133 | db1a4972 | Paolo Bonzini | { |
134 | db1a4972 | Paolo Bonzini | if (timers_state.cpu_ticks_enabled) {
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135 | db1a4972 | Paolo Bonzini | timers_state.cpu_ticks_offset = cpu_get_ticks(); |
136 | db1a4972 | Paolo Bonzini | timers_state.cpu_clock_offset = cpu_get_clock(); |
137 | db1a4972 | Paolo Bonzini | timers_state.cpu_ticks_enabled = 0;
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138 | db1a4972 | Paolo Bonzini | } |
139 | db1a4972 | Paolo Bonzini | } |
140 | db1a4972 | Paolo Bonzini | |
141 | db1a4972 | Paolo Bonzini | /***********************************************************/
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142 | db1a4972 | Paolo Bonzini | /* timers */
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143 | db1a4972 | Paolo Bonzini | |
144 | db1a4972 | Paolo Bonzini | #define QEMU_CLOCK_REALTIME 0 |
145 | db1a4972 | Paolo Bonzini | #define QEMU_CLOCK_VIRTUAL 1 |
146 | db1a4972 | Paolo Bonzini | #define QEMU_CLOCK_HOST 2 |
147 | db1a4972 | Paolo Bonzini | |
148 | db1a4972 | Paolo Bonzini | struct QEMUClock {
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149 | db1a4972 | Paolo Bonzini | int type;
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150 | db1a4972 | Paolo Bonzini | int enabled;
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151 | ab33fcda | Paolo Bonzini | |
152 | ab33fcda | Paolo Bonzini | QEMUTimer *warp_timer; |
153 | db1a4972 | Paolo Bonzini | }; |
154 | db1a4972 | Paolo Bonzini | |
155 | db1a4972 | Paolo Bonzini | struct QEMUTimer {
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156 | db1a4972 | Paolo Bonzini | QEMUClock *clock; |
157 | 4a998740 | Paolo Bonzini | int64_t expire_time; /* in nanoseconds */
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158 | 4a998740 | Paolo Bonzini | int scale;
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159 | db1a4972 | Paolo Bonzini | QEMUTimerCB *cb; |
160 | db1a4972 | Paolo Bonzini | void *opaque;
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161 | db1a4972 | Paolo Bonzini | struct QEMUTimer *next;
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162 | db1a4972 | Paolo Bonzini | }; |
163 | db1a4972 | Paolo Bonzini | |
164 | db1a4972 | Paolo Bonzini | struct qemu_alarm_timer {
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165 | db1a4972 | Paolo Bonzini | char const *name; |
166 | db1a4972 | Paolo Bonzini | int (*start)(struct qemu_alarm_timer *t); |
167 | db1a4972 | Paolo Bonzini | void (*stop)(struct qemu_alarm_timer *t); |
168 | db1a4972 | Paolo Bonzini | void (*rearm)(struct qemu_alarm_timer *t); |
169 | cd0544ee | Stefan Weil | #if defined(__linux__)
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170 | cd0544ee | Stefan Weil | int fd;
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171 | cd0544ee | Stefan Weil | timer_t timer; |
172 | cd0544ee | Stefan Weil | #elif defined(_WIN32)
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173 | cd0544ee | Stefan Weil | HANDLE timer; |
174 | cd0544ee | Stefan Weil | #endif
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175 | db1a4972 | Paolo Bonzini | char expired;
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176 | db1a4972 | Paolo Bonzini | char pending;
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177 | db1a4972 | Paolo Bonzini | }; |
178 | db1a4972 | Paolo Bonzini | |
179 | db1a4972 | Paolo Bonzini | static struct qemu_alarm_timer *alarm_timer; |
180 | db1a4972 | Paolo Bonzini | |
181 | 45c7b37f | Stefan Weil | static bool qemu_timer_expired_ns(QEMUTimer *timer_head, int64_t current_time) |
182 | 45c7b37f | Stefan Weil | { |
183 | 45c7b37f | Stefan Weil | return timer_head && (timer_head->expire_time <= current_time);
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184 | 45c7b37f | Stefan Weil | } |
185 | 45c7b37f | Stefan Weil | |
186 | db1a4972 | Paolo Bonzini | int qemu_alarm_pending(void) |
187 | db1a4972 | Paolo Bonzini | { |
188 | db1a4972 | Paolo Bonzini | return alarm_timer->pending;
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189 | db1a4972 | Paolo Bonzini | } |
190 | db1a4972 | Paolo Bonzini | |
191 | db1a4972 | Paolo Bonzini | static inline int alarm_has_dynticks(struct qemu_alarm_timer *t) |
192 | db1a4972 | Paolo Bonzini | { |
193 | db1a4972 | Paolo Bonzini | return !!t->rearm;
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194 | db1a4972 | Paolo Bonzini | } |
195 | db1a4972 | Paolo Bonzini | |
196 | db1a4972 | Paolo Bonzini | static void qemu_rearm_alarm_timer(struct qemu_alarm_timer *t) |
197 | db1a4972 | Paolo Bonzini | { |
198 | db1a4972 | Paolo Bonzini | if (!alarm_has_dynticks(t))
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199 | db1a4972 | Paolo Bonzini | return;
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200 | db1a4972 | Paolo Bonzini | |
201 | db1a4972 | Paolo Bonzini | t->rearm(t); |
202 | db1a4972 | Paolo Bonzini | } |
203 | db1a4972 | Paolo Bonzini | |
204 | 9c13246a | Paolo Bonzini | /* TODO: MIN_TIMER_REARM_NS should be optimized */
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205 | 9c13246a | Paolo Bonzini | #define MIN_TIMER_REARM_NS 250000 |
206 | db1a4972 | Paolo Bonzini | |
207 | db1a4972 | Paolo Bonzini | #ifdef _WIN32
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208 | db1a4972 | Paolo Bonzini | |
209 | 2f9cba0c | Stefan Weil | static int mm_start_timer(struct qemu_alarm_timer *t); |
210 | 2f9cba0c | Stefan Weil | static void mm_stop_timer(struct qemu_alarm_timer *t); |
211 | 2f9cba0c | Stefan Weil | static void mm_rearm_timer(struct qemu_alarm_timer *t); |
212 | 2f9cba0c | Stefan Weil | |
213 | db1a4972 | Paolo Bonzini | static int win32_start_timer(struct qemu_alarm_timer *t); |
214 | db1a4972 | Paolo Bonzini | static void win32_stop_timer(struct qemu_alarm_timer *t); |
215 | db1a4972 | Paolo Bonzini | static void win32_rearm_timer(struct qemu_alarm_timer *t); |
216 | db1a4972 | Paolo Bonzini | |
217 | db1a4972 | Paolo Bonzini | #else
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218 | db1a4972 | Paolo Bonzini | |
219 | db1a4972 | Paolo Bonzini | static int unix_start_timer(struct qemu_alarm_timer *t); |
220 | db1a4972 | Paolo Bonzini | static void unix_stop_timer(struct qemu_alarm_timer *t); |
221 | db1a4972 | Paolo Bonzini | |
222 | db1a4972 | Paolo Bonzini | #ifdef __linux__
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223 | db1a4972 | Paolo Bonzini | |
224 | db1a4972 | Paolo Bonzini | static int dynticks_start_timer(struct qemu_alarm_timer *t); |
225 | db1a4972 | Paolo Bonzini | static void dynticks_stop_timer(struct qemu_alarm_timer *t); |
226 | db1a4972 | Paolo Bonzini | static void dynticks_rearm_timer(struct qemu_alarm_timer *t); |
227 | db1a4972 | Paolo Bonzini | |
228 | db1a4972 | Paolo Bonzini | #endif /* __linux__ */ |
229 | db1a4972 | Paolo Bonzini | |
230 | db1a4972 | Paolo Bonzini | #endif /* _WIN32 */ |
231 | db1a4972 | Paolo Bonzini | |
232 | db1a4972 | Paolo Bonzini | /* Correlation between real and virtual time is always going to be
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233 | db1a4972 | Paolo Bonzini | fairly approximate, so ignore small variation.
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234 | db1a4972 | Paolo Bonzini | When the guest is idle real and virtual time will be aligned in
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235 | db1a4972 | Paolo Bonzini | the IO wait loop. */
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236 | db1a4972 | Paolo Bonzini | #define ICOUNT_WOBBLE (get_ticks_per_sec() / 10) |
237 | db1a4972 | Paolo Bonzini | |
238 | db1a4972 | Paolo Bonzini | static void icount_adjust(void) |
239 | db1a4972 | Paolo Bonzini | { |
240 | db1a4972 | Paolo Bonzini | int64_t cur_time; |
241 | db1a4972 | Paolo Bonzini | int64_t cur_icount; |
242 | db1a4972 | Paolo Bonzini | int64_t delta; |
243 | db1a4972 | Paolo Bonzini | static int64_t last_delta;
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244 | db1a4972 | Paolo Bonzini | /* If the VM is not running, then do nothing. */
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245 | db1a4972 | Paolo Bonzini | if (!vm_running)
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246 | db1a4972 | Paolo Bonzini | return;
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247 | db1a4972 | Paolo Bonzini | |
248 | db1a4972 | Paolo Bonzini | cur_time = cpu_get_clock(); |
249 | 74475455 | Paolo Bonzini | cur_icount = qemu_get_clock_ns(vm_clock); |
250 | db1a4972 | Paolo Bonzini | delta = cur_icount - cur_time; |
251 | db1a4972 | Paolo Bonzini | /* FIXME: This is a very crude algorithm, somewhat prone to oscillation. */
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252 | db1a4972 | Paolo Bonzini | if (delta > 0 |
253 | db1a4972 | Paolo Bonzini | && last_delta + ICOUNT_WOBBLE < delta * 2
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254 | db1a4972 | Paolo Bonzini | && icount_time_shift > 0) {
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255 | db1a4972 | Paolo Bonzini | /* The guest is getting too far ahead. Slow time down. */
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256 | db1a4972 | Paolo Bonzini | icount_time_shift--; |
257 | db1a4972 | Paolo Bonzini | } |
258 | db1a4972 | Paolo Bonzini | if (delta < 0 |
259 | db1a4972 | Paolo Bonzini | && last_delta - ICOUNT_WOBBLE > delta * 2
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260 | db1a4972 | Paolo Bonzini | && icount_time_shift < MAX_ICOUNT_SHIFT) { |
261 | db1a4972 | Paolo Bonzini | /* The guest is getting too far behind. Speed time up. */
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262 | db1a4972 | Paolo Bonzini | icount_time_shift++; |
263 | db1a4972 | Paolo Bonzini | } |
264 | db1a4972 | Paolo Bonzini | last_delta = delta; |
265 | db1a4972 | Paolo Bonzini | qemu_icount_bias = cur_icount - (qemu_icount << icount_time_shift); |
266 | db1a4972 | Paolo Bonzini | } |
267 | db1a4972 | Paolo Bonzini | |
268 | db1a4972 | Paolo Bonzini | static void icount_adjust_rt(void * opaque) |
269 | db1a4972 | Paolo Bonzini | { |
270 | db1a4972 | Paolo Bonzini | qemu_mod_timer(icount_rt_timer, |
271 | 7bd427d8 | Paolo Bonzini | qemu_get_clock_ms(rt_clock) + 1000);
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272 | db1a4972 | Paolo Bonzini | icount_adjust(); |
273 | db1a4972 | Paolo Bonzini | } |
274 | db1a4972 | Paolo Bonzini | |
275 | db1a4972 | Paolo Bonzini | static void icount_adjust_vm(void * opaque) |
276 | db1a4972 | Paolo Bonzini | { |
277 | db1a4972 | Paolo Bonzini | qemu_mod_timer(icount_vm_timer, |
278 | 74475455 | Paolo Bonzini | qemu_get_clock_ns(vm_clock) + get_ticks_per_sec() / 10);
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279 | db1a4972 | Paolo Bonzini | icount_adjust(); |
280 | db1a4972 | Paolo Bonzini | } |
281 | db1a4972 | Paolo Bonzini | |
282 | db1a4972 | Paolo Bonzini | int64_t qemu_icount_round(int64_t count) |
283 | db1a4972 | Paolo Bonzini | { |
284 | db1a4972 | Paolo Bonzini | return (count + (1 << icount_time_shift) - 1) >> icount_time_shift; |
285 | db1a4972 | Paolo Bonzini | } |
286 | db1a4972 | Paolo Bonzini | |
287 | db1a4972 | Paolo Bonzini | static struct qemu_alarm_timer alarm_timers[] = { |
288 | db1a4972 | Paolo Bonzini | #ifndef _WIN32
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289 | db1a4972 | Paolo Bonzini | #ifdef __linux__
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290 | db1a4972 | Paolo Bonzini | {"dynticks", dynticks_start_timer,
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291 | cd0544ee | Stefan Weil | dynticks_stop_timer, dynticks_rearm_timer}, |
292 | db1a4972 | Paolo Bonzini | #endif
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293 | cd0544ee | Stefan Weil | {"unix", unix_start_timer, unix_stop_timer, NULL}, |
294 | db1a4972 | Paolo Bonzini | #else
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295 | 2f9cba0c | Stefan Weil | {"mmtimer", mm_start_timer, mm_stop_timer, NULL}, |
296 | 2f9cba0c | Stefan Weil | {"mmtimer2", mm_start_timer, mm_stop_timer, mm_rearm_timer},
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297 | cd0544ee | Stefan Weil | {"dynticks", win32_start_timer, win32_stop_timer, win32_rearm_timer},
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298 | cd0544ee | Stefan Weil | {"win32", win32_start_timer, win32_stop_timer, NULL}, |
299 | db1a4972 | Paolo Bonzini | #endif
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300 | db1a4972 | Paolo Bonzini | {NULL, }
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301 | db1a4972 | Paolo Bonzini | }; |
302 | db1a4972 | Paolo Bonzini | |
303 | db1a4972 | Paolo Bonzini | static void show_available_alarms(void) |
304 | db1a4972 | Paolo Bonzini | { |
305 | db1a4972 | Paolo Bonzini | int i;
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306 | db1a4972 | Paolo Bonzini | |
307 | db1a4972 | Paolo Bonzini | printf("Available alarm timers, in order of precedence:\n");
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308 | db1a4972 | Paolo Bonzini | for (i = 0; alarm_timers[i].name; i++) |
309 | db1a4972 | Paolo Bonzini | printf("%s\n", alarm_timers[i].name);
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310 | db1a4972 | Paolo Bonzini | } |
311 | db1a4972 | Paolo Bonzini | |
312 | db1a4972 | Paolo Bonzini | void configure_alarms(char const *opt) |
313 | db1a4972 | Paolo Bonzini | { |
314 | db1a4972 | Paolo Bonzini | int i;
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315 | db1a4972 | Paolo Bonzini | int cur = 0; |
316 | db1a4972 | Paolo Bonzini | int count = ARRAY_SIZE(alarm_timers) - 1; |
317 | db1a4972 | Paolo Bonzini | char *arg;
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318 | db1a4972 | Paolo Bonzini | char *name;
|
319 | db1a4972 | Paolo Bonzini | struct qemu_alarm_timer tmp;
|
320 | db1a4972 | Paolo Bonzini | |
321 | db1a4972 | Paolo Bonzini | if (!strcmp(opt, "?")) { |
322 | db1a4972 | Paolo Bonzini | show_available_alarms(); |
323 | db1a4972 | Paolo Bonzini | exit(0);
|
324 | db1a4972 | Paolo Bonzini | } |
325 | db1a4972 | Paolo Bonzini | |
326 | db1a4972 | Paolo Bonzini | arg = qemu_strdup(opt); |
327 | db1a4972 | Paolo Bonzini | |
328 | db1a4972 | Paolo Bonzini | /* Reorder the array */
|
329 | db1a4972 | Paolo Bonzini | name = strtok(arg, ",");
|
330 | db1a4972 | Paolo Bonzini | while (name) {
|
331 | db1a4972 | Paolo Bonzini | for (i = 0; i < count && alarm_timers[i].name; i++) { |
332 | db1a4972 | Paolo Bonzini | if (!strcmp(alarm_timers[i].name, name))
|
333 | db1a4972 | Paolo Bonzini | break;
|
334 | db1a4972 | Paolo Bonzini | } |
335 | db1a4972 | Paolo Bonzini | |
336 | db1a4972 | Paolo Bonzini | if (i == count) {
|
337 | db1a4972 | Paolo Bonzini | fprintf(stderr, "Unknown clock %s\n", name);
|
338 | db1a4972 | Paolo Bonzini | goto next;
|
339 | db1a4972 | Paolo Bonzini | } |
340 | db1a4972 | Paolo Bonzini | |
341 | db1a4972 | Paolo Bonzini | if (i < cur)
|
342 | db1a4972 | Paolo Bonzini | /* Ignore */
|
343 | db1a4972 | Paolo Bonzini | goto next;
|
344 | db1a4972 | Paolo Bonzini | |
345 | db1a4972 | Paolo Bonzini | /* Swap */
|
346 | db1a4972 | Paolo Bonzini | tmp = alarm_timers[i]; |
347 | db1a4972 | Paolo Bonzini | alarm_timers[i] = alarm_timers[cur]; |
348 | db1a4972 | Paolo Bonzini | alarm_timers[cur] = tmp; |
349 | db1a4972 | Paolo Bonzini | |
350 | db1a4972 | Paolo Bonzini | cur++; |
351 | db1a4972 | Paolo Bonzini | next:
|
352 | db1a4972 | Paolo Bonzini | name = strtok(NULL, ","); |
353 | db1a4972 | Paolo Bonzini | } |
354 | db1a4972 | Paolo Bonzini | |
355 | db1a4972 | Paolo Bonzini | qemu_free(arg); |
356 | db1a4972 | Paolo Bonzini | |
357 | db1a4972 | Paolo Bonzini | if (cur) {
|
358 | db1a4972 | Paolo Bonzini | /* Disable remaining timers */
|
359 | db1a4972 | Paolo Bonzini | for (i = cur; i < count; i++)
|
360 | db1a4972 | Paolo Bonzini | alarm_timers[i].name = NULL;
|
361 | db1a4972 | Paolo Bonzini | } else {
|
362 | db1a4972 | Paolo Bonzini | show_available_alarms(); |
363 | db1a4972 | Paolo Bonzini | exit(1);
|
364 | db1a4972 | Paolo Bonzini | } |
365 | db1a4972 | Paolo Bonzini | } |
366 | db1a4972 | Paolo Bonzini | |
367 | db1a4972 | Paolo Bonzini | #define QEMU_NUM_CLOCKS 3 |
368 | db1a4972 | Paolo Bonzini | |
369 | db1a4972 | Paolo Bonzini | QEMUClock *rt_clock; |
370 | db1a4972 | Paolo Bonzini | QEMUClock *vm_clock; |
371 | db1a4972 | Paolo Bonzini | QEMUClock *host_clock; |
372 | db1a4972 | Paolo Bonzini | |
373 | db1a4972 | Paolo Bonzini | static QEMUTimer *active_timers[QEMU_NUM_CLOCKS];
|
374 | db1a4972 | Paolo Bonzini | |
375 | db1a4972 | Paolo Bonzini | static QEMUClock *qemu_new_clock(int type) |
376 | db1a4972 | Paolo Bonzini | { |
377 | db1a4972 | Paolo Bonzini | QEMUClock *clock; |
378 | db1a4972 | Paolo Bonzini | clock = qemu_mallocz(sizeof(QEMUClock));
|
379 | db1a4972 | Paolo Bonzini | clock->type = type; |
380 | db1a4972 | Paolo Bonzini | clock->enabled = 1;
|
381 | db1a4972 | Paolo Bonzini | return clock;
|
382 | db1a4972 | Paolo Bonzini | } |
383 | db1a4972 | Paolo Bonzini | |
384 | db1a4972 | Paolo Bonzini | void qemu_clock_enable(QEMUClock *clock, int enabled) |
385 | db1a4972 | Paolo Bonzini | { |
386 | db1a4972 | Paolo Bonzini | clock->enabled = enabled; |
387 | db1a4972 | Paolo Bonzini | } |
388 | db1a4972 | Paolo Bonzini | |
389 | ab33fcda | Paolo Bonzini | static int64_t vm_clock_warp_start;
|
390 | ab33fcda | Paolo Bonzini | |
391 | ab33fcda | Paolo Bonzini | static void icount_warp_rt(void *opaque) |
392 | ab33fcda | Paolo Bonzini | { |
393 | ab33fcda | Paolo Bonzini | if (vm_clock_warp_start == -1) { |
394 | ab33fcda | Paolo Bonzini | return;
|
395 | ab33fcda | Paolo Bonzini | } |
396 | ab33fcda | Paolo Bonzini | |
397 | ab33fcda | Paolo Bonzini | if (vm_running) {
|
398 | ab33fcda | Paolo Bonzini | int64_t clock = qemu_get_clock_ns(rt_clock); |
399 | ab33fcda | Paolo Bonzini | int64_t warp_delta = clock - vm_clock_warp_start; |
400 | ab33fcda | Paolo Bonzini | if (use_icount == 1) { |
401 | ab33fcda | Paolo Bonzini | qemu_icount_bias += warp_delta; |
402 | ab33fcda | Paolo Bonzini | } else {
|
403 | ab33fcda | Paolo Bonzini | /*
|
404 | ab33fcda | Paolo Bonzini | * In adaptive mode, do not let the vm_clock run too
|
405 | ab33fcda | Paolo Bonzini | * far ahead of real time.
|
406 | ab33fcda | Paolo Bonzini | */
|
407 | ab33fcda | Paolo Bonzini | int64_t cur_time = cpu_get_clock(); |
408 | ab33fcda | Paolo Bonzini | int64_t cur_icount = qemu_get_clock_ns(vm_clock); |
409 | ab33fcda | Paolo Bonzini | int64_t delta = cur_time - cur_icount; |
410 | ab33fcda | Paolo Bonzini | qemu_icount_bias += MIN(warp_delta, delta); |
411 | ab33fcda | Paolo Bonzini | } |
412 | ab33fcda | Paolo Bonzini | if (qemu_timer_expired(active_timers[QEMU_CLOCK_VIRTUAL],
|
413 | ab33fcda | Paolo Bonzini | qemu_get_clock_ns(vm_clock))) { |
414 | ab33fcda | Paolo Bonzini | qemu_notify_event(); |
415 | ab33fcda | Paolo Bonzini | } |
416 | ab33fcda | Paolo Bonzini | } |
417 | ab33fcda | Paolo Bonzini | vm_clock_warp_start = -1;
|
418 | ab33fcda | Paolo Bonzini | } |
419 | ab33fcda | Paolo Bonzini | |
420 | ab33fcda | Paolo Bonzini | void qemu_clock_warp(QEMUClock *clock)
|
421 | ab33fcda | Paolo Bonzini | { |
422 | ab33fcda | Paolo Bonzini | int64_t deadline; |
423 | ab33fcda | Paolo Bonzini | |
424 | ab33fcda | Paolo Bonzini | if (!clock->warp_timer) {
|
425 | ab33fcda | Paolo Bonzini | return;
|
426 | ab33fcda | Paolo Bonzini | } |
427 | ab33fcda | Paolo Bonzini | |
428 | ab33fcda | Paolo Bonzini | /*
|
429 | ab33fcda | Paolo Bonzini | * There are too many global variables to make the "warp" behavior
|
430 | ab33fcda | Paolo Bonzini | * applicable to other clocks. But a clock argument removes the
|
431 | ab33fcda | Paolo Bonzini | * need for if statements all over the place.
|
432 | ab33fcda | Paolo Bonzini | */
|
433 | ab33fcda | Paolo Bonzini | assert(clock == vm_clock); |
434 | ab33fcda | Paolo Bonzini | |
435 | ab33fcda | Paolo Bonzini | /*
|
436 | ab33fcda | Paolo Bonzini | * If the CPUs have been sleeping, advance the vm_clock timer now. This
|
437 | ab33fcda | Paolo Bonzini | * ensures that the deadline for the timer is computed correctly below.
|
438 | ab33fcda | Paolo Bonzini | * This also makes sure that the insn counter is synchronized before the
|
439 | ab33fcda | Paolo Bonzini | * CPU starts running, in case the CPU is woken by an event other than
|
440 | ab33fcda | Paolo Bonzini | * the earliest vm_clock timer.
|
441 | ab33fcda | Paolo Bonzini | */
|
442 | ab33fcda | Paolo Bonzini | icount_warp_rt(NULL);
|
443 | ab33fcda | Paolo Bonzini | if (!all_cpu_threads_idle() || !active_timers[clock->type]) {
|
444 | ab33fcda | Paolo Bonzini | qemu_del_timer(clock->warp_timer); |
445 | ab33fcda | Paolo Bonzini | return;
|
446 | ab33fcda | Paolo Bonzini | } |
447 | ab33fcda | Paolo Bonzini | |
448 | ab33fcda | Paolo Bonzini | vm_clock_warp_start = qemu_get_clock_ns(rt_clock); |
449 | cb842c90 | Paolo Bonzini | deadline = qemu_next_icount_deadline(); |
450 | ab33fcda | Paolo Bonzini | if (deadline > 0) { |
451 | ab33fcda | Paolo Bonzini | /*
|
452 | ab33fcda | Paolo Bonzini | * Ensure the vm_clock proceeds even when the virtual CPU goes to
|
453 | ab33fcda | Paolo Bonzini | * sleep. Otherwise, the CPU might be waiting for a future timer
|
454 | ab33fcda | Paolo Bonzini | * interrupt to wake it up, but the interrupt never comes because
|
455 | ab33fcda | Paolo Bonzini | * the vCPU isn't running any insns and thus doesn't advance the
|
456 | ab33fcda | Paolo Bonzini | * vm_clock.
|
457 | ab33fcda | Paolo Bonzini | *
|
458 | ab33fcda | Paolo Bonzini | * An extreme solution for this problem would be to never let VCPUs
|
459 | ab33fcda | Paolo Bonzini | * sleep in icount mode if there is a pending vm_clock timer; rather
|
460 | ab33fcda | Paolo Bonzini | * time could just advance to the next vm_clock event. Instead, we
|
461 | ab33fcda | Paolo Bonzini | * do stop VCPUs and only advance vm_clock after some "real" time,
|
462 | ab33fcda | Paolo Bonzini | * (related to the time left until the next event) has passed. This
|
463 | ab33fcda | Paolo Bonzini | * rt_clock timer will do this. This avoids that the warps are too
|
464 | ab33fcda | Paolo Bonzini | * visible externally---for example, you will not be sending network
|
465 | ab33fcda | Paolo Bonzini | * packets continously instead of every 100ms.
|
466 | ab33fcda | Paolo Bonzini | */
|
467 | ab33fcda | Paolo Bonzini | qemu_mod_timer(clock->warp_timer, vm_clock_warp_start + deadline); |
468 | ab33fcda | Paolo Bonzini | } else {
|
469 | ab33fcda | Paolo Bonzini | qemu_notify_event(); |
470 | ab33fcda | Paolo Bonzini | } |
471 | ab33fcda | Paolo Bonzini | } |
472 | ab33fcda | Paolo Bonzini | |
473 | 4a998740 | Paolo Bonzini | QEMUTimer *qemu_new_timer(QEMUClock *clock, int scale,
|
474 | 4a998740 | Paolo Bonzini | QEMUTimerCB *cb, void *opaque)
|
475 | db1a4972 | Paolo Bonzini | { |
476 | db1a4972 | Paolo Bonzini | QEMUTimer *ts; |
477 | db1a4972 | Paolo Bonzini | |
478 | db1a4972 | Paolo Bonzini | ts = qemu_mallocz(sizeof(QEMUTimer));
|
479 | db1a4972 | Paolo Bonzini | ts->clock = clock; |
480 | db1a4972 | Paolo Bonzini | ts->cb = cb; |
481 | db1a4972 | Paolo Bonzini | ts->opaque = opaque; |
482 | 4a998740 | Paolo Bonzini | ts->scale = scale; |
483 | db1a4972 | Paolo Bonzini | return ts;
|
484 | db1a4972 | Paolo Bonzini | } |
485 | db1a4972 | Paolo Bonzini | |
486 | db1a4972 | Paolo Bonzini | void qemu_free_timer(QEMUTimer *ts)
|
487 | db1a4972 | Paolo Bonzini | { |
488 | db1a4972 | Paolo Bonzini | qemu_free(ts); |
489 | db1a4972 | Paolo Bonzini | } |
490 | db1a4972 | Paolo Bonzini | |
491 | db1a4972 | Paolo Bonzini | /* stop a timer, but do not dealloc it */
|
492 | db1a4972 | Paolo Bonzini | void qemu_del_timer(QEMUTimer *ts)
|
493 | db1a4972 | Paolo Bonzini | { |
494 | db1a4972 | Paolo Bonzini | QEMUTimer **pt, *t; |
495 | db1a4972 | Paolo Bonzini | |
496 | db1a4972 | Paolo Bonzini | /* NOTE: this code must be signal safe because
|
497 | db1a4972 | Paolo Bonzini | qemu_timer_expired() can be called from a signal. */
|
498 | db1a4972 | Paolo Bonzini | pt = &active_timers[ts->clock->type]; |
499 | db1a4972 | Paolo Bonzini | for(;;) {
|
500 | db1a4972 | Paolo Bonzini | t = *pt; |
501 | db1a4972 | Paolo Bonzini | if (!t)
|
502 | db1a4972 | Paolo Bonzini | break;
|
503 | db1a4972 | Paolo Bonzini | if (t == ts) {
|
504 | db1a4972 | Paolo Bonzini | *pt = t->next; |
505 | db1a4972 | Paolo Bonzini | break;
|
506 | db1a4972 | Paolo Bonzini | } |
507 | db1a4972 | Paolo Bonzini | pt = &t->next; |
508 | db1a4972 | Paolo Bonzini | } |
509 | db1a4972 | Paolo Bonzini | } |
510 | db1a4972 | Paolo Bonzini | |
511 | db1a4972 | Paolo Bonzini | /* modify the current timer so that it will be fired when current_time
|
512 | db1a4972 | Paolo Bonzini | >= expire_time. The corresponding callback will be called. */
|
513 | 4a998740 | Paolo Bonzini | static void qemu_mod_timer_ns(QEMUTimer *ts, int64_t expire_time) |
514 | db1a4972 | Paolo Bonzini | { |
515 | db1a4972 | Paolo Bonzini | QEMUTimer **pt, *t; |
516 | db1a4972 | Paolo Bonzini | |
517 | db1a4972 | Paolo Bonzini | qemu_del_timer(ts); |
518 | db1a4972 | Paolo Bonzini | |
519 | db1a4972 | Paolo Bonzini | /* add the timer in the sorted list */
|
520 | db1a4972 | Paolo Bonzini | /* NOTE: this code must be signal safe because
|
521 | db1a4972 | Paolo Bonzini | qemu_timer_expired() can be called from a signal. */
|
522 | db1a4972 | Paolo Bonzini | pt = &active_timers[ts->clock->type]; |
523 | db1a4972 | Paolo Bonzini | for(;;) {
|
524 | db1a4972 | Paolo Bonzini | t = *pt; |
525 | 45c7b37f | Stefan Weil | if (!qemu_timer_expired_ns(t, expire_time)) {
|
526 | db1a4972 | Paolo Bonzini | break;
|
527 | 45c7b37f | Stefan Weil | } |
528 | db1a4972 | Paolo Bonzini | pt = &t->next; |
529 | db1a4972 | Paolo Bonzini | } |
530 | db1a4972 | Paolo Bonzini | ts->expire_time = expire_time; |
531 | db1a4972 | Paolo Bonzini | ts->next = *pt; |
532 | db1a4972 | Paolo Bonzini | *pt = ts; |
533 | db1a4972 | Paolo Bonzini | |
534 | db1a4972 | Paolo Bonzini | /* Rearm if necessary */
|
535 | db1a4972 | Paolo Bonzini | if (pt == &active_timers[ts->clock->type]) {
|
536 | db1a4972 | Paolo Bonzini | if (!alarm_timer->pending) {
|
537 | db1a4972 | Paolo Bonzini | qemu_rearm_alarm_timer(alarm_timer); |
538 | db1a4972 | Paolo Bonzini | } |
539 | db1a4972 | Paolo Bonzini | /* Interrupt execution to force deadline recalculation. */
|
540 | ab33fcda | Paolo Bonzini | qemu_clock_warp(ts->clock); |
541 | ab33fcda | Paolo Bonzini | if (use_icount) {
|
542 | db1a4972 | Paolo Bonzini | qemu_notify_event(); |
543 | ab33fcda | Paolo Bonzini | } |
544 | db1a4972 | Paolo Bonzini | } |
545 | db1a4972 | Paolo Bonzini | } |
546 | db1a4972 | Paolo Bonzini | |
547 | 4a998740 | Paolo Bonzini | /* modify the current timer so that it will be fired when current_time
|
548 | 4a998740 | Paolo Bonzini | >= expire_time. The corresponding callback will be called. */
|
549 | 4a998740 | Paolo Bonzini | void qemu_mod_timer(QEMUTimer *ts, int64_t expire_time)
|
550 | 4a998740 | Paolo Bonzini | { |
551 | 4a998740 | Paolo Bonzini | qemu_mod_timer_ns(ts, expire_time * ts->scale); |
552 | 4a998740 | Paolo Bonzini | } |
553 | 4a998740 | Paolo Bonzini | |
554 | db1a4972 | Paolo Bonzini | int qemu_timer_pending(QEMUTimer *ts)
|
555 | db1a4972 | Paolo Bonzini | { |
556 | db1a4972 | Paolo Bonzini | QEMUTimer *t; |
557 | db1a4972 | Paolo Bonzini | for(t = active_timers[ts->clock->type]; t != NULL; t = t->next) { |
558 | db1a4972 | Paolo Bonzini | if (t == ts)
|
559 | db1a4972 | Paolo Bonzini | return 1; |
560 | db1a4972 | Paolo Bonzini | } |
561 | db1a4972 | Paolo Bonzini | return 0; |
562 | db1a4972 | Paolo Bonzini | } |
563 | db1a4972 | Paolo Bonzini | |
564 | db1a4972 | Paolo Bonzini | int qemu_timer_expired(QEMUTimer *timer_head, int64_t current_time)
|
565 | db1a4972 | Paolo Bonzini | { |
566 | 45c7b37f | Stefan Weil | return qemu_timer_expired_ns(timer_head, current_time * timer_head->scale);
|
567 | db1a4972 | Paolo Bonzini | } |
568 | db1a4972 | Paolo Bonzini | |
569 | db1a4972 | Paolo Bonzini | static void qemu_run_timers(QEMUClock *clock) |
570 | db1a4972 | Paolo Bonzini | { |
571 | db1a4972 | Paolo Bonzini | QEMUTimer **ptimer_head, *ts; |
572 | db1a4972 | Paolo Bonzini | int64_t current_time; |
573 | db1a4972 | Paolo Bonzini | |
574 | db1a4972 | Paolo Bonzini | if (!clock->enabled)
|
575 | db1a4972 | Paolo Bonzini | return;
|
576 | db1a4972 | Paolo Bonzini | |
577 | 4a998740 | Paolo Bonzini | current_time = qemu_get_clock_ns(clock); |
578 | db1a4972 | Paolo Bonzini | ptimer_head = &active_timers[clock->type]; |
579 | db1a4972 | Paolo Bonzini | for(;;) {
|
580 | db1a4972 | Paolo Bonzini | ts = *ptimer_head; |
581 | 45c7b37f | Stefan Weil | if (!qemu_timer_expired_ns(ts, current_time)) {
|
582 | db1a4972 | Paolo Bonzini | break;
|
583 | 45c7b37f | Stefan Weil | } |
584 | db1a4972 | Paolo Bonzini | /* remove timer from the list before calling the callback */
|
585 | db1a4972 | Paolo Bonzini | *ptimer_head = ts->next; |
586 | db1a4972 | Paolo Bonzini | ts->next = NULL;
|
587 | db1a4972 | Paolo Bonzini | |
588 | db1a4972 | Paolo Bonzini | /* run the callback (the timer list can be modified) */
|
589 | db1a4972 | Paolo Bonzini | ts->cb(ts->opaque); |
590 | db1a4972 | Paolo Bonzini | } |
591 | db1a4972 | Paolo Bonzini | } |
592 | db1a4972 | Paolo Bonzini | |
593 | db1a4972 | Paolo Bonzini | int64_t qemu_get_clock_ns(QEMUClock *clock) |
594 | db1a4972 | Paolo Bonzini | { |
595 | db1a4972 | Paolo Bonzini | switch(clock->type) {
|
596 | db1a4972 | Paolo Bonzini | case QEMU_CLOCK_REALTIME:
|
597 | db1a4972 | Paolo Bonzini | return get_clock();
|
598 | db1a4972 | Paolo Bonzini | default:
|
599 | db1a4972 | Paolo Bonzini | case QEMU_CLOCK_VIRTUAL:
|
600 | db1a4972 | Paolo Bonzini | if (use_icount) {
|
601 | db1a4972 | Paolo Bonzini | return cpu_get_icount();
|
602 | db1a4972 | Paolo Bonzini | } else {
|
603 | db1a4972 | Paolo Bonzini | return cpu_get_clock();
|
604 | db1a4972 | Paolo Bonzini | } |
605 | db1a4972 | Paolo Bonzini | case QEMU_CLOCK_HOST:
|
606 | db1a4972 | Paolo Bonzini | return get_clock_realtime();
|
607 | db1a4972 | Paolo Bonzini | } |
608 | db1a4972 | Paolo Bonzini | } |
609 | db1a4972 | Paolo Bonzini | |
610 | db1a4972 | Paolo Bonzini | void init_clocks(void) |
611 | db1a4972 | Paolo Bonzini | { |
612 | db1a4972 | Paolo Bonzini | rt_clock = qemu_new_clock(QEMU_CLOCK_REALTIME); |
613 | db1a4972 | Paolo Bonzini | vm_clock = qemu_new_clock(QEMU_CLOCK_VIRTUAL); |
614 | db1a4972 | Paolo Bonzini | host_clock = qemu_new_clock(QEMU_CLOCK_HOST); |
615 | db1a4972 | Paolo Bonzini | |
616 | db1a4972 | Paolo Bonzini | rtc_clock = host_clock; |
617 | db1a4972 | Paolo Bonzini | } |
618 | db1a4972 | Paolo Bonzini | |
619 | db1a4972 | Paolo Bonzini | /* save a timer */
|
620 | db1a4972 | Paolo Bonzini | void qemu_put_timer(QEMUFile *f, QEMUTimer *ts)
|
621 | db1a4972 | Paolo Bonzini | { |
622 | db1a4972 | Paolo Bonzini | uint64_t expire_time; |
623 | db1a4972 | Paolo Bonzini | |
624 | db1a4972 | Paolo Bonzini | if (qemu_timer_pending(ts)) {
|
625 | db1a4972 | Paolo Bonzini | expire_time = ts->expire_time; |
626 | db1a4972 | Paolo Bonzini | } else {
|
627 | db1a4972 | Paolo Bonzini | expire_time = -1;
|
628 | db1a4972 | Paolo Bonzini | } |
629 | db1a4972 | Paolo Bonzini | qemu_put_be64(f, expire_time); |
630 | db1a4972 | Paolo Bonzini | } |
631 | db1a4972 | Paolo Bonzini | |
632 | db1a4972 | Paolo Bonzini | void qemu_get_timer(QEMUFile *f, QEMUTimer *ts)
|
633 | db1a4972 | Paolo Bonzini | { |
634 | db1a4972 | Paolo Bonzini | uint64_t expire_time; |
635 | db1a4972 | Paolo Bonzini | |
636 | db1a4972 | Paolo Bonzini | expire_time = qemu_get_be64(f); |
637 | db1a4972 | Paolo Bonzini | if (expire_time != -1) { |
638 | 4a998740 | Paolo Bonzini | qemu_mod_timer_ns(ts, expire_time); |
639 | db1a4972 | Paolo Bonzini | } else {
|
640 | db1a4972 | Paolo Bonzini | qemu_del_timer(ts); |
641 | db1a4972 | Paolo Bonzini | } |
642 | db1a4972 | Paolo Bonzini | } |
643 | db1a4972 | Paolo Bonzini | |
644 | db1a4972 | Paolo Bonzini | static const VMStateDescription vmstate_timers = { |
645 | db1a4972 | Paolo Bonzini | .name = "timer",
|
646 | db1a4972 | Paolo Bonzini | .version_id = 2,
|
647 | db1a4972 | Paolo Bonzini | .minimum_version_id = 1,
|
648 | db1a4972 | Paolo Bonzini | .minimum_version_id_old = 1,
|
649 | db1a4972 | Paolo Bonzini | .fields = (VMStateField []) { |
650 | db1a4972 | Paolo Bonzini | VMSTATE_INT64(cpu_ticks_offset, TimersState), |
651 | db1a4972 | Paolo Bonzini | VMSTATE_INT64(dummy, TimersState), |
652 | db1a4972 | Paolo Bonzini | VMSTATE_INT64_V(cpu_clock_offset, TimersState, 2),
|
653 | db1a4972 | Paolo Bonzini | VMSTATE_END_OF_LIST() |
654 | db1a4972 | Paolo Bonzini | } |
655 | db1a4972 | Paolo Bonzini | }; |
656 | db1a4972 | Paolo Bonzini | |
657 | db1a4972 | Paolo Bonzini | void configure_icount(const char *option) |
658 | db1a4972 | Paolo Bonzini | { |
659 | 0be71e32 | Alex Williamson | vmstate_register(NULL, 0, &vmstate_timers, &timers_state); |
660 | db1a4972 | Paolo Bonzini | if (!option)
|
661 | db1a4972 | Paolo Bonzini | return;
|
662 | db1a4972 | Paolo Bonzini | |
663 | ab33fcda | Paolo Bonzini | #ifdef CONFIG_IOTHREAD
|
664 | ab33fcda | Paolo Bonzini | vm_clock->warp_timer = qemu_new_timer_ns(rt_clock, icount_warp_rt, NULL);
|
665 | ab33fcda | Paolo Bonzini | #endif
|
666 | ab33fcda | Paolo Bonzini | |
667 | db1a4972 | Paolo Bonzini | if (strcmp(option, "auto") != 0) { |
668 | db1a4972 | Paolo Bonzini | icount_time_shift = strtol(option, NULL, 0); |
669 | db1a4972 | Paolo Bonzini | use_icount = 1;
|
670 | db1a4972 | Paolo Bonzini | return;
|
671 | db1a4972 | Paolo Bonzini | } |
672 | db1a4972 | Paolo Bonzini | |
673 | db1a4972 | Paolo Bonzini | use_icount = 2;
|
674 | db1a4972 | Paolo Bonzini | |
675 | db1a4972 | Paolo Bonzini | /* 125MIPS seems a reasonable initial guess at the guest speed.
|
676 | db1a4972 | Paolo Bonzini | It will be corrected fairly quickly anyway. */
|
677 | db1a4972 | Paolo Bonzini | icount_time_shift = 3;
|
678 | db1a4972 | Paolo Bonzini | |
679 | db1a4972 | Paolo Bonzini | /* Have both realtime and virtual time triggers for speed adjustment.
|
680 | db1a4972 | Paolo Bonzini | The realtime trigger catches emulated time passing too slowly,
|
681 | db1a4972 | Paolo Bonzini | the virtual time trigger catches emulated time passing too fast.
|
682 | db1a4972 | Paolo Bonzini | Realtime triggers occur even when idle, so use them less frequently
|
683 | db1a4972 | Paolo Bonzini | than VM triggers. */
|
684 | 7bd427d8 | Paolo Bonzini | icount_rt_timer = qemu_new_timer_ms(rt_clock, icount_adjust_rt, NULL);
|
685 | db1a4972 | Paolo Bonzini | qemu_mod_timer(icount_rt_timer, |
686 | 7bd427d8 | Paolo Bonzini | qemu_get_clock_ms(rt_clock) + 1000);
|
687 | 74475455 | Paolo Bonzini | icount_vm_timer = qemu_new_timer_ns(vm_clock, icount_adjust_vm, NULL);
|
688 | db1a4972 | Paolo Bonzini | qemu_mod_timer(icount_vm_timer, |
689 | 74475455 | Paolo Bonzini | qemu_get_clock_ns(vm_clock) + get_ticks_per_sec() / 10);
|
690 | db1a4972 | Paolo Bonzini | } |
691 | db1a4972 | Paolo Bonzini | |
692 | db1a4972 | Paolo Bonzini | void qemu_run_all_timers(void) |
693 | db1a4972 | Paolo Bonzini | { |
694 | ca5a2a4b | Paolo Bonzini | alarm_timer->pending = 0;
|
695 | ca5a2a4b | Paolo Bonzini | |
696 | db1a4972 | Paolo Bonzini | /* rearm timer, if not periodic */
|
697 | db1a4972 | Paolo Bonzini | if (alarm_timer->expired) {
|
698 | db1a4972 | Paolo Bonzini | alarm_timer->expired = 0;
|
699 | db1a4972 | Paolo Bonzini | qemu_rearm_alarm_timer(alarm_timer); |
700 | db1a4972 | Paolo Bonzini | } |
701 | db1a4972 | Paolo Bonzini | |
702 | db1a4972 | Paolo Bonzini | /* vm time timers */
|
703 | db1a4972 | Paolo Bonzini | if (vm_running) {
|
704 | db1a4972 | Paolo Bonzini | qemu_run_timers(vm_clock); |
705 | db1a4972 | Paolo Bonzini | } |
706 | db1a4972 | Paolo Bonzini | |
707 | db1a4972 | Paolo Bonzini | qemu_run_timers(rt_clock); |
708 | db1a4972 | Paolo Bonzini | qemu_run_timers(host_clock); |
709 | db1a4972 | Paolo Bonzini | } |
710 | db1a4972 | Paolo Bonzini | |
711 | 4c3d45eb | Paolo Bonzini | static int64_t qemu_next_alarm_deadline(void); |
712 | 4c3d45eb | Paolo Bonzini | |
713 | db1a4972 | Paolo Bonzini | #ifdef _WIN32
|
714 | 68c23e55 | Paolo Bonzini | static void CALLBACK host_alarm_handler(PVOID lpParam, BOOLEAN unused) |
715 | db1a4972 | Paolo Bonzini | #else
|
716 | db1a4972 | Paolo Bonzini | static void host_alarm_handler(int host_signum) |
717 | db1a4972 | Paolo Bonzini | #endif
|
718 | db1a4972 | Paolo Bonzini | { |
719 | db1a4972 | Paolo Bonzini | struct qemu_alarm_timer *t = alarm_timer;
|
720 | db1a4972 | Paolo Bonzini | if (!t)
|
721 | db1a4972 | Paolo Bonzini | return;
|
722 | db1a4972 | Paolo Bonzini | |
723 | db1a4972 | Paolo Bonzini | #if 0
|
724 | db1a4972 | Paolo Bonzini | #define DISP_FREQ 1000
|
725 | db1a4972 | Paolo Bonzini | {
|
726 | db1a4972 | Paolo Bonzini | static int64_t delta_min = INT64_MAX;
|
727 | db1a4972 | Paolo Bonzini | static int64_t delta_max, delta_cum, last_clock, delta, ti;
|
728 | db1a4972 | Paolo Bonzini | static int count;
|
729 | 74475455 | Paolo Bonzini | ti = qemu_get_clock_ns(vm_clock);
|
730 | db1a4972 | Paolo Bonzini | if (last_clock != 0) {
|
731 | db1a4972 | Paolo Bonzini | delta = ti - last_clock;
|
732 | db1a4972 | Paolo Bonzini | if (delta < delta_min)
|
733 | db1a4972 | Paolo Bonzini | delta_min = delta;
|
734 | db1a4972 | Paolo Bonzini | if (delta > delta_max)
|
735 | db1a4972 | Paolo Bonzini | delta_max = delta;
|
736 | db1a4972 | Paolo Bonzini | delta_cum += delta;
|
737 | db1a4972 | Paolo Bonzini | if (++count == DISP_FREQ) {
|
738 | db1a4972 | Paolo Bonzini | printf("timer: min=%" PRId64 " us max=%" PRId64 " us avg=%" PRId64 " us avg_freq=%0.3f Hz\n",
|
739 | db1a4972 | Paolo Bonzini | muldiv64(delta_min, 1000000, get_ticks_per_sec()),
|
740 | db1a4972 | Paolo Bonzini | muldiv64(delta_max, 1000000, get_ticks_per_sec()),
|
741 | db1a4972 | Paolo Bonzini | muldiv64(delta_cum, 1000000 / DISP_FREQ, get_ticks_per_sec()),
|
742 | db1a4972 | Paolo Bonzini | (double)get_ticks_per_sec() / ((double)delta_cum / DISP_FREQ));
|
743 | db1a4972 | Paolo Bonzini | count = 0;
|
744 | db1a4972 | Paolo Bonzini | delta_min = INT64_MAX;
|
745 | db1a4972 | Paolo Bonzini | delta_max = 0;
|
746 | db1a4972 | Paolo Bonzini | delta_cum = 0;
|
747 | db1a4972 | Paolo Bonzini | }
|
748 | db1a4972 | Paolo Bonzini | }
|
749 | db1a4972 | Paolo Bonzini | last_clock = ti;
|
750 | db1a4972 | Paolo Bonzini | }
|
751 | db1a4972 | Paolo Bonzini | #endif
|
752 | db1a4972 | Paolo Bonzini | if (alarm_has_dynticks(t) ||
|
753 | 4c3d45eb | Paolo Bonzini | qemu_next_alarm_deadline () <= 0) {
|
754 | db1a4972 | Paolo Bonzini | t->expired = alarm_has_dynticks(t); |
755 | db1a4972 | Paolo Bonzini | t->pending = 1;
|
756 | db1a4972 | Paolo Bonzini | qemu_notify_event(); |
757 | db1a4972 | Paolo Bonzini | } |
758 | db1a4972 | Paolo Bonzini | } |
759 | db1a4972 | Paolo Bonzini | |
760 | cb842c90 | Paolo Bonzini | int64_t qemu_next_icount_deadline(void)
|
761 | db1a4972 | Paolo Bonzini | { |
762 | db1a4972 | Paolo Bonzini | /* To avoid problems with overflow limit this to 2^32. */
|
763 | db1a4972 | Paolo Bonzini | int64_t delta = INT32_MAX; |
764 | db1a4972 | Paolo Bonzini | |
765 | cb842c90 | Paolo Bonzini | assert(use_icount); |
766 | db1a4972 | Paolo Bonzini | if (active_timers[QEMU_CLOCK_VIRTUAL]) {
|
767 | db1a4972 | Paolo Bonzini | delta = active_timers[QEMU_CLOCK_VIRTUAL]->expire_time - |
768 | 9c13246a | Paolo Bonzini | qemu_get_clock_ns(vm_clock); |
769 | db1a4972 | Paolo Bonzini | } |
770 | db1a4972 | Paolo Bonzini | |
771 | db1a4972 | Paolo Bonzini | if (delta < 0) |
772 | db1a4972 | Paolo Bonzini | delta = 0;
|
773 | db1a4972 | Paolo Bonzini | |
774 | db1a4972 | Paolo Bonzini | return delta;
|
775 | db1a4972 | Paolo Bonzini | } |
776 | db1a4972 | Paolo Bonzini | |
777 | 4c3d45eb | Paolo Bonzini | static int64_t qemu_next_alarm_deadline(void) |
778 | db1a4972 | Paolo Bonzini | { |
779 | db1a4972 | Paolo Bonzini | int64_t delta; |
780 | db1a4972 | Paolo Bonzini | int64_t rtdelta; |
781 | db1a4972 | Paolo Bonzini | |
782 | 6ad0a1ed | Paolo Bonzini | if (!use_icount && active_timers[QEMU_CLOCK_VIRTUAL]) {
|
783 | 6ad0a1ed | Paolo Bonzini | delta = active_timers[QEMU_CLOCK_VIRTUAL]->expire_time - |
784 | 74475455 | Paolo Bonzini | qemu_get_clock_ns(vm_clock); |
785 | 6ad0a1ed | Paolo Bonzini | } else {
|
786 | db1a4972 | Paolo Bonzini | delta = INT32_MAX; |
787 | 6ad0a1ed | Paolo Bonzini | } |
788 | 6ad0a1ed | Paolo Bonzini | if (active_timers[QEMU_CLOCK_HOST]) {
|
789 | 6ad0a1ed | Paolo Bonzini | int64_t hdelta = active_timers[QEMU_CLOCK_HOST]->expire_time - |
790 | 6ad0a1ed | Paolo Bonzini | qemu_get_clock_ns(host_clock); |
791 | 6ad0a1ed | Paolo Bonzini | if (hdelta < delta)
|
792 | 6ad0a1ed | Paolo Bonzini | delta = hdelta; |
793 | 6ad0a1ed | Paolo Bonzini | } |
794 | db1a4972 | Paolo Bonzini | if (active_timers[QEMU_CLOCK_REALTIME]) {
|
795 | 4a998740 | Paolo Bonzini | rtdelta = (active_timers[QEMU_CLOCK_REALTIME]->expire_time - |
796 | 9c13246a | Paolo Bonzini | qemu_get_clock_ns(rt_clock)); |
797 | db1a4972 | Paolo Bonzini | if (rtdelta < delta)
|
798 | db1a4972 | Paolo Bonzini | delta = rtdelta; |
799 | db1a4972 | Paolo Bonzini | } |
800 | db1a4972 | Paolo Bonzini | |
801 | db1a4972 | Paolo Bonzini | return delta;
|
802 | db1a4972 | Paolo Bonzini | } |
803 | db1a4972 | Paolo Bonzini | |
804 | 4c3d45eb | Paolo Bonzini | #if defined(__linux__)
|
805 | 4c3d45eb | Paolo Bonzini | |
806 | db1a4972 | Paolo Bonzini | static int dynticks_start_timer(struct qemu_alarm_timer *t) |
807 | db1a4972 | Paolo Bonzini | { |
808 | db1a4972 | Paolo Bonzini | struct sigevent ev;
|
809 | db1a4972 | Paolo Bonzini | timer_t host_timer; |
810 | db1a4972 | Paolo Bonzini | struct sigaction act;
|
811 | db1a4972 | Paolo Bonzini | |
812 | db1a4972 | Paolo Bonzini | sigfillset(&act.sa_mask); |
813 | db1a4972 | Paolo Bonzini | act.sa_flags = 0;
|
814 | db1a4972 | Paolo Bonzini | act.sa_handler = host_alarm_handler; |
815 | db1a4972 | Paolo Bonzini | |
816 | db1a4972 | Paolo Bonzini | sigaction(SIGALRM, &act, NULL);
|
817 | db1a4972 | Paolo Bonzini | |
818 | db1a4972 | Paolo Bonzini | /*
|
819 | db1a4972 | Paolo Bonzini | * Initialize ev struct to 0 to avoid valgrind complaining
|
820 | db1a4972 | Paolo Bonzini | * about uninitialized data in timer_create call
|
821 | db1a4972 | Paolo Bonzini | */
|
822 | db1a4972 | Paolo Bonzini | memset(&ev, 0, sizeof(ev)); |
823 | db1a4972 | Paolo Bonzini | ev.sigev_value.sival_int = 0;
|
824 | db1a4972 | Paolo Bonzini | ev.sigev_notify = SIGEV_SIGNAL; |
825 | db1a4972 | Paolo Bonzini | ev.sigev_signo = SIGALRM; |
826 | db1a4972 | Paolo Bonzini | |
827 | db1a4972 | Paolo Bonzini | if (timer_create(CLOCK_REALTIME, &ev, &host_timer)) {
|
828 | db1a4972 | Paolo Bonzini | perror("timer_create");
|
829 | db1a4972 | Paolo Bonzini | |
830 | db1a4972 | Paolo Bonzini | /* disable dynticks */
|
831 | db1a4972 | Paolo Bonzini | fprintf(stderr, "Dynamic Ticks disabled\n");
|
832 | db1a4972 | Paolo Bonzini | |
833 | db1a4972 | Paolo Bonzini | return -1; |
834 | db1a4972 | Paolo Bonzini | } |
835 | db1a4972 | Paolo Bonzini | |
836 | cd0544ee | Stefan Weil | t->timer = host_timer; |
837 | db1a4972 | Paolo Bonzini | |
838 | db1a4972 | Paolo Bonzini | return 0; |
839 | db1a4972 | Paolo Bonzini | } |
840 | db1a4972 | Paolo Bonzini | |
841 | db1a4972 | Paolo Bonzini | static void dynticks_stop_timer(struct qemu_alarm_timer *t) |
842 | db1a4972 | Paolo Bonzini | { |
843 | cd0544ee | Stefan Weil | timer_t host_timer = t->timer; |
844 | db1a4972 | Paolo Bonzini | |
845 | db1a4972 | Paolo Bonzini | timer_delete(host_timer); |
846 | db1a4972 | Paolo Bonzini | } |
847 | db1a4972 | Paolo Bonzini | |
848 | db1a4972 | Paolo Bonzini | static void dynticks_rearm_timer(struct qemu_alarm_timer *t) |
849 | db1a4972 | Paolo Bonzini | { |
850 | cd0544ee | Stefan Weil | timer_t host_timer = t->timer; |
851 | db1a4972 | Paolo Bonzini | struct itimerspec timeout;
|
852 | 9c13246a | Paolo Bonzini | int64_t nearest_delta_ns = INT64_MAX; |
853 | 9c13246a | Paolo Bonzini | int64_t current_ns; |
854 | db1a4972 | Paolo Bonzini | |
855 | db1a4972 | Paolo Bonzini | assert(alarm_has_dynticks(t)); |
856 | db1a4972 | Paolo Bonzini | if (!active_timers[QEMU_CLOCK_REALTIME] &&
|
857 | db1a4972 | Paolo Bonzini | !active_timers[QEMU_CLOCK_VIRTUAL] && |
858 | db1a4972 | Paolo Bonzini | !active_timers[QEMU_CLOCK_HOST]) |
859 | db1a4972 | Paolo Bonzini | return;
|
860 | db1a4972 | Paolo Bonzini | |
861 | 4c3d45eb | Paolo Bonzini | nearest_delta_ns = qemu_next_alarm_deadline(); |
862 | 4c3d45eb | Paolo Bonzini | if (nearest_delta_ns < MIN_TIMER_REARM_NS)
|
863 | 4c3d45eb | Paolo Bonzini | nearest_delta_ns = MIN_TIMER_REARM_NS; |
864 | db1a4972 | Paolo Bonzini | |
865 | db1a4972 | Paolo Bonzini | /* check whether a timer is already running */
|
866 | db1a4972 | Paolo Bonzini | if (timer_gettime(host_timer, &timeout)) {
|
867 | db1a4972 | Paolo Bonzini | perror("gettime");
|
868 | db1a4972 | Paolo Bonzini | fprintf(stderr, "Internal timer error: aborting\n");
|
869 | db1a4972 | Paolo Bonzini | exit(1);
|
870 | db1a4972 | Paolo Bonzini | } |
871 | 9c13246a | Paolo Bonzini | current_ns = timeout.it_value.tv_sec * 1000000000LL + timeout.it_value.tv_nsec;
|
872 | 9c13246a | Paolo Bonzini | if (current_ns && current_ns <= nearest_delta_ns)
|
873 | db1a4972 | Paolo Bonzini | return;
|
874 | db1a4972 | Paolo Bonzini | |
875 | db1a4972 | Paolo Bonzini | timeout.it_interval.tv_sec = 0;
|
876 | db1a4972 | Paolo Bonzini | timeout.it_interval.tv_nsec = 0; /* 0 for one-shot timer */ |
877 | 9c13246a | Paolo Bonzini | timeout.it_value.tv_sec = nearest_delta_ns / 1000000000;
|
878 | 9c13246a | Paolo Bonzini | timeout.it_value.tv_nsec = nearest_delta_ns % 1000000000;
|
879 | db1a4972 | Paolo Bonzini | if (timer_settime(host_timer, 0 /* RELATIVE */, &timeout, NULL)) { |
880 | db1a4972 | Paolo Bonzini | perror("settime");
|
881 | db1a4972 | Paolo Bonzini | fprintf(stderr, "Internal timer error: aborting\n");
|
882 | db1a4972 | Paolo Bonzini | exit(1);
|
883 | db1a4972 | Paolo Bonzini | } |
884 | db1a4972 | Paolo Bonzini | } |
885 | db1a4972 | Paolo Bonzini | |
886 | db1a4972 | Paolo Bonzini | #endif /* defined(__linux__) */ |
887 | db1a4972 | Paolo Bonzini | |
888 | f26e5a54 | Stefan Weil | #if !defined(_WIN32)
|
889 | f26e5a54 | Stefan Weil | |
890 | db1a4972 | Paolo Bonzini | static int unix_start_timer(struct qemu_alarm_timer *t) |
891 | db1a4972 | Paolo Bonzini | { |
892 | db1a4972 | Paolo Bonzini | struct sigaction act;
|
893 | db1a4972 | Paolo Bonzini | struct itimerval itv;
|
894 | db1a4972 | Paolo Bonzini | int err;
|
895 | db1a4972 | Paolo Bonzini | |
896 | db1a4972 | Paolo Bonzini | /* timer signal */
|
897 | db1a4972 | Paolo Bonzini | sigfillset(&act.sa_mask); |
898 | db1a4972 | Paolo Bonzini | act.sa_flags = 0;
|
899 | db1a4972 | Paolo Bonzini | act.sa_handler = host_alarm_handler; |
900 | db1a4972 | Paolo Bonzini | |
901 | db1a4972 | Paolo Bonzini | sigaction(SIGALRM, &act, NULL);
|
902 | db1a4972 | Paolo Bonzini | |
903 | db1a4972 | Paolo Bonzini | itv.it_interval.tv_sec = 0;
|
904 | db1a4972 | Paolo Bonzini | /* for i386 kernel 2.6 to get 1 ms */
|
905 | db1a4972 | Paolo Bonzini | itv.it_interval.tv_usec = 999;
|
906 | db1a4972 | Paolo Bonzini | itv.it_value.tv_sec = 0;
|
907 | db1a4972 | Paolo Bonzini | itv.it_value.tv_usec = 10 * 1000; |
908 | db1a4972 | Paolo Bonzini | |
909 | db1a4972 | Paolo Bonzini | err = setitimer(ITIMER_REAL, &itv, NULL);
|
910 | db1a4972 | Paolo Bonzini | if (err)
|
911 | db1a4972 | Paolo Bonzini | return -1; |
912 | db1a4972 | Paolo Bonzini | |
913 | db1a4972 | Paolo Bonzini | return 0; |
914 | db1a4972 | Paolo Bonzini | } |
915 | db1a4972 | Paolo Bonzini | |
916 | db1a4972 | Paolo Bonzini | static void unix_stop_timer(struct qemu_alarm_timer *t) |
917 | db1a4972 | Paolo Bonzini | { |
918 | db1a4972 | Paolo Bonzini | struct itimerval itv;
|
919 | db1a4972 | Paolo Bonzini | |
920 | db1a4972 | Paolo Bonzini | memset(&itv, 0, sizeof(itv)); |
921 | db1a4972 | Paolo Bonzini | setitimer(ITIMER_REAL, &itv, NULL);
|
922 | db1a4972 | Paolo Bonzini | } |
923 | db1a4972 | Paolo Bonzini | |
924 | db1a4972 | Paolo Bonzini | #endif /* !defined(_WIN32) */ |
925 | db1a4972 | Paolo Bonzini | |
926 | db1a4972 | Paolo Bonzini | |
927 | db1a4972 | Paolo Bonzini | #ifdef _WIN32
|
928 | db1a4972 | Paolo Bonzini | |
929 | 2f9cba0c | Stefan Weil | static MMRESULT mm_timer;
|
930 | 2f9cba0c | Stefan Weil | static unsigned mm_period; |
931 | 2f9cba0c | Stefan Weil | |
932 | 2f9cba0c | Stefan Weil | static void CALLBACK mm_alarm_handler(UINT uTimerID, UINT uMsg, |
933 | 2f9cba0c | Stefan Weil | DWORD_PTR dwUser, DWORD_PTR dw1, |
934 | 2f9cba0c | Stefan Weil | DWORD_PTR dw2) |
935 | 2f9cba0c | Stefan Weil | { |
936 | 2f9cba0c | Stefan Weil | struct qemu_alarm_timer *t = alarm_timer;
|
937 | 2f9cba0c | Stefan Weil | if (!t) {
|
938 | 2f9cba0c | Stefan Weil | return;
|
939 | 2f9cba0c | Stefan Weil | } |
940 | 2f9cba0c | Stefan Weil | if (alarm_has_dynticks(t) || qemu_next_alarm_deadline() <= 0) { |
941 | 2f9cba0c | Stefan Weil | t->expired = alarm_has_dynticks(t); |
942 | 2f9cba0c | Stefan Weil | t->pending = 1;
|
943 | 2f9cba0c | Stefan Weil | qemu_notify_event(); |
944 | 2f9cba0c | Stefan Weil | } |
945 | 2f9cba0c | Stefan Weil | } |
946 | 2f9cba0c | Stefan Weil | |
947 | 2f9cba0c | Stefan Weil | static int mm_start_timer(struct qemu_alarm_timer *t) |
948 | 2f9cba0c | Stefan Weil | { |
949 | 2f9cba0c | Stefan Weil | TIMECAPS tc; |
950 | 2f9cba0c | Stefan Weil | UINT flags; |
951 | 2f9cba0c | Stefan Weil | |
952 | 2f9cba0c | Stefan Weil | memset(&tc, 0, sizeof(tc)); |
953 | 2f9cba0c | Stefan Weil | timeGetDevCaps(&tc, sizeof(tc));
|
954 | 2f9cba0c | Stefan Weil | |
955 | 2f9cba0c | Stefan Weil | mm_period = tc.wPeriodMin; |
956 | 2f9cba0c | Stefan Weil | timeBeginPeriod(mm_period); |
957 | 2f9cba0c | Stefan Weil | |
958 | 2f9cba0c | Stefan Weil | flags = TIME_CALLBACK_FUNCTION; |
959 | 2f9cba0c | Stefan Weil | if (alarm_has_dynticks(t)) {
|
960 | 2f9cba0c | Stefan Weil | flags |= TIME_ONESHOT; |
961 | 2f9cba0c | Stefan Weil | } else {
|
962 | 2f9cba0c | Stefan Weil | flags |= TIME_PERIODIC; |
963 | 2f9cba0c | Stefan Weil | } |
964 | 2f9cba0c | Stefan Weil | |
965 | 2f9cba0c | Stefan Weil | mm_timer = timeSetEvent(1, /* interval (ms) */ |
966 | 2f9cba0c | Stefan Weil | mm_period, /* resolution */
|
967 | 2f9cba0c | Stefan Weil | mm_alarm_handler, /* function */
|
968 | 2f9cba0c | Stefan Weil | (DWORD_PTR)t, /* parameter */
|
969 | 2f9cba0c | Stefan Weil | flags); |
970 | 2f9cba0c | Stefan Weil | |
971 | 2f9cba0c | Stefan Weil | if (!mm_timer) {
|
972 | 2f9cba0c | Stefan Weil | fprintf(stderr, "Failed to initialize win32 alarm timer: %ld\n",
|
973 | 2f9cba0c | Stefan Weil | GetLastError()); |
974 | 2f9cba0c | Stefan Weil | timeEndPeriod(mm_period); |
975 | 2f9cba0c | Stefan Weil | return -1; |
976 | 2f9cba0c | Stefan Weil | } |
977 | 2f9cba0c | Stefan Weil | |
978 | 2f9cba0c | Stefan Weil | return 0; |
979 | 2f9cba0c | Stefan Weil | } |
980 | 2f9cba0c | Stefan Weil | |
981 | 2f9cba0c | Stefan Weil | static void mm_stop_timer(struct qemu_alarm_timer *t) |
982 | 2f9cba0c | Stefan Weil | { |
983 | 2f9cba0c | Stefan Weil | timeKillEvent(mm_timer); |
984 | 2f9cba0c | Stefan Weil | timeEndPeriod(mm_period); |
985 | 2f9cba0c | Stefan Weil | } |
986 | 2f9cba0c | Stefan Weil | |
987 | 2f9cba0c | Stefan Weil | static void mm_rearm_timer(struct qemu_alarm_timer *t) |
988 | 2f9cba0c | Stefan Weil | { |
989 | 2f9cba0c | Stefan Weil | int nearest_delta_ms;
|
990 | 2f9cba0c | Stefan Weil | |
991 | 2f9cba0c | Stefan Weil | assert(alarm_has_dynticks(t)); |
992 | 2f9cba0c | Stefan Weil | if (!active_timers[QEMU_CLOCK_REALTIME] &&
|
993 | 2f9cba0c | Stefan Weil | !active_timers[QEMU_CLOCK_VIRTUAL] && |
994 | 2f9cba0c | Stefan Weil | !active_timers[QEMU_CLOCK_HOST]) { |
995 | 2f9cba0c | Stefan Weil | return;
|
996 | 2f9cba0c | Stefan Weil | } |
997 | 2f9cba0c | Stefan Weil | |
998 | 2f9cba0c | Stefan Weil | timeKillEvent(mm_timer); |
999 | 2f9cba0c | Stefan Weil | |
1000 | 2f9cba0c | Stefan Weil | nearest_delta_ms = (qemu_next_alarm_deadline() + 999999) / 1000000; |
1001 | 2f9cba0c | Stefan Weil | if (nearest_delta_ms < 1) { |
1002 | 2f9cba0c | Stefan Weil | nearest_delta_ms = 1;
|
1003 | 2f9cba0c | Stefan Weil | } |
1004 | 2f9cba0c | Stefan Weil | mm_timer = timeSetEvent(nearest_delta_ms, |
1005 | 2f9cba0c | Stefan Weil | mm_period, |
1006 | 2f9cba0c | Stefan Weil | mm_alarm_handler, |
1007 | 2f9cba0c | Stefan Weil | (DWORD_PTR)t, |
1008 | 2f9cba0c | Stefan Weil | TIME_ONESHOT | TIME_CALLBACK_FUNCTION); |
1009 | 2f9cba0c | Stefan Weil | |
1010 | 2f9cba0c | Stefan Weil | if (!mm_timer) {
|
1011 | 2f9cba0c | Stefan Weil | fprintf(stderr, "Failed to re-arm win32 alarm timer %ld\n",
|
1012 | 2f9cba0c | Stefan Weil | GetLastError()); |
1013 | 2f9cba0c | Stefan Weil | |
1014 | 2f9cba0c | Stefan Weil | timeEndPeriod(mm_period); |
1015 | 2f9cba0c | Stefan Weil | exit(1);
|
1016 | 2f9cba0c | Stefan Weil | } |
1017 | 2f9cba0c | Stefan Weil | } |
1018 | 2f9cba0c | Stefan Weil | |
1019 | db1a4972 | Paolo Bonzini | static int win32_start_timer(struct qemu_alarm_timer *t) |
1020 | db1a4972 | Paolo Bonzini | { |
1021 | 68c23e55 | Paolo Bonzini | HANDLE hTimer; |
1022 | 68c23e55 | Paolo Bonzini | BOOLEAN success; |
1023 | 68c23e55 | Paolo Bonzini | |
1024 | 68c23e55 | Paolo Bonzini | /* If you call ChangeTimerQueueTimer on a one-shot timer (its period
|
1025 | 68c23e55 | Paolo Bonzini | is zero) that has already expired, the timer is not updated. Since
|
1026 | 68c23e55 | Paolo Bonzini | creating a new timer is relatively expensive, set a bogus one-hour
|
1027 | 68c23e55 | Paolo Bonzini | interval in the dynticks case. */
|
1028 | 68c23e55 | Paolo Bonzini | success = CreateTimerQueueTimer(&hTimer, |
1029 | 68c23e55 | Paolo Bonzini | NULL,
|
1030 | 68c23e55 | Paolo Bonzini | host_alarm_handler, |
1031 | 68c23e55 | Paolo Bonzini | t, |
1032 | 68c23e55 | Paolo Bonzini | 1,
|
1033 | 68c23e55 | Paolo Bonzini | alarm_has_dynticks(t) ? 3600000 : 1, |
1034 | 68c23e55 | Paolo Bonzini | WT_EXECUTEINTIMERTHREAD); |
1035 | 68c23e55 | Paolo Bonzini | |
1036 | 68c23e55 | Paolo Bonzini | if (!success) {
|
1037 | db1a4972 | Paolo Bonzini | fprintf(stderr, "Failed to initialize win32 alarm timer: %ld\n",
|
1038 | db1a4972 | Paolo Bonzini | GetLastError()); |
1039 | db1a4972 | Paolo Bonzini | return -1; |
1040 | db1a4972 | Paolo Bonzini | } |
1041 | db1a4972 | Paolo Bonzini | |
1042 | cd0544ee | Stefan Weil | t->timer = hTimer; |
1043 | db1a4972 | Paolo Bonzini | return 0; |
1044 | db1a4972 | Paolo Bonzini | } |
1045 | db1a4972 | Paolo Bonzini | |
1046 | db1a4972 | Paolo Bonzini | static void win32_stop_timer(struct qemu_alarm_timer *t) |
1047 | db1a4972 | Paolo Bonzini | { |
1048 | cd0544ee | Stefan Weil | HANDLE hTimer = t->timer; |
1049 | db1a4972 | Paolo Bonzini | |
1050 | 68c23e55 | Paolo Bonzini | if (hTimer) {
|
1051 | 68c23e55 | Paolo Bonzini | DeleteTimerQueueTimer(NULL, hTimer, NULL); |
1052 | 68c23e55 | Paolo Bonzini | } |
1053 | db1a4972 | Paolo Bonzini | } |
1054 | db1a4972 | Paolo Bonzini | |
1055 | db1a4972 | Paolo Bonzini | static void win32_rearm_timer(struct qemu_alarm_timer *t) |
1056 | db1a4972 | Paolo Bonzini | { |
1057 | cd0544ee | Stefan Weil | HANDLE hTimer = t->timer; |
1058 | cfced5b2 | Paolo Bonzini | int nearest_delta_ms;
|
1059 | 68c23e55 | Paolo Bonzini | BOOLEAN success; |
1060 | db1a4972 | Paolo Bonzini | |
1061 | db1a4972 | Paolo Bonzini | assert(alarm_has_dynticks(t)); |
1062 | db1a4972 | Paolo Bonzini | if (!active_timers[QEMU_CLOCK_REALTIME] &&
|
1063 | db1a4972 | Paolo Bonzini | !active_timers[QEMU_CLOCK_VIRTUAL] && |
1064 | db1a4972 | Paolo Bonzini | !active_timers[QEMU_CLOCK_HOST]) |
1065 | db1a4972 | Paolo Bonzini | return;
|
1066 | db1a4972 | Paolo Bonzini | |
1067 | cfced5b2 | Paolo Bonzini | nearest_delta_ms = (qemu_next_alarm_deadline() + 999999) / 1000000; |
1068 | cfced5b2 | Paolo Bonzini | if (nearest_delta_ms < 1) { |
1069 | cfced5b2 | Paolo Bonzini | nearest_delta_ms = 1;
|
1070 | cfced5b2 | Paolo Bonzini | } |
1071 | 68c23e55 | Paolo Bonzini | success = ChangeTimerQueueTimer(NULL,
|
1072 | 68c23e55 | Paolo Bonzini | hTimer, |
1073 | 68c23e55 | Paolo Bonzini | nearest_delta_ms, |
1074 | 68c23e55 | Paolo Bonzini | 3600000);
|
1075 | db1a4972 | Paolo Bonzini | |
1076 | 68c23e55 | Paolo Bonzini | if (!success) {
|
1077 | 68c23e55 | Paolo Bonzini | fprintf(stderr, "Failed to rearm win32 alarm timer: %ld\n",
|
1078 | 68c23e55 | Paolo Bonzini | GetLastError()); |
1079 | 68c23e55 | Paolo Bonzini | exit(-1);
|
1080 | db1a4972 | Paolo Bonzini | } |
1081 | 68c23e55 | Paolo Bonzini | |
1082 | db1a4972 | Paolo Bonzini | } |
1083 | db1a4972 | Paolo Bonzini | |
1084 | db1a4972 | Paolo Bonzini | #endif /* _WIN32 */ |
1085 | db1a4972 | Paolo Bonzini | |
1086 | db1a4972 | Paolo Bonzini | static void alarm_timer_on_change_state_rearm(void *opaque, int running, int reason) |
1087 | db1a4972 | Paolo Bonzini | { |
1088 | db1a4972 | Paolo Bonzini | if (running)
|
1089 | db1a4972 | Paolo Bonzini | qemu_rearm_alarm_timer((struct qemu_alarm_timer *) opaque);
|
1090 | db1a4972 | Paolo Bonzini | } |
1091 | db1a4972 | Paolo Bonzini | |
1092 | db1a4972 | Paolo Bonzini | int init_timer_alarm(void) |
1093 | db1a4972 | Paolo Bonzini | { |
1094 | db1a4972 | Paolo Bonzini | struct qemu_alarm_timer *t = NULL; |
1095 | db1a4972 | Paolo Bonzini | int i, err = -1; |
1096 | db1a4972 | Paolo Bonzini | |
1097 | db1a4972 | Paolo Bonzini | for (i = 0; alarm_timers[i].name; i++) { |
1098 | db1a4972 | Paolo Bonzini | t = &alarm_timers[i]; |
1099 | db1a4972 | Paolo Bonzini | |
1100 | db1a4972 | Paolo Bonzini | err = t->start(t); |
1101 | db1a4972 | Paolo Bonzini | if (!err)
|
1102 | db1a4972 | Paolo Bonzini | break;
|
1103 | db1a4972 | Paolo Bonzini | } |
1104 | db1a4972 | Paolo Bonzini | |
1105 | db1a4972 | Paolo Bonzini | if (err) {
|
1106 | db1a4972 | Paolo Bonzini | err = -ENOENT; |
1107 | db1a4972 | Paolo Bonzini | goto fail;
|
1108 | db1a4972 | Paolo Bonzini | } |
1109 | db1a4972 | Paolo Bonzini | |
1110 | db1a4972 | Paolo Bonzini | /* first event is at time 0 */
|
1111 | db1a4972 | Paolo Bonzini | t->pending = 1;
|
1112 | db1a4972 | Paolo Bonzini | alarm_timer = t; |
1113 | db1a4972 | Paolo Bonzini | qemu_add_vm_change_state_handler(alarm_timer_on_change_state_rearm, t); |
1114 | db1a4972 | Paolo Bonzini | |
1115 | db1a4972 | Paolo Bonzini | return 0; |
1116 | db1a4972 | Paolo Bonzini | |
1117 | db1a4972 | Paolo Bonzini | fail:
|
1118 | db1a4972 | Paolo Bonzini | return err;
|
1119 | db1a4972 | Paolo Bonzini | } |
1120 | db1a4972 | Paolo Bonzini | |
1121 | db1a4972 | Paolo Bonzini | void quit_timers(void) |
1122 | db1a4972 | Paolo Bonzini | { |
1123 | db1a4972 | Paolo Bonzini | struct qemu_alarm_timer *t = alarm_timer;
|
1124 | db1a4972 | Paolo Bonzini | alarm_timer = NULL;
|
1125 | db1a4972 | Paolo Bonzini | t->stop(t); |
1126 | db1a4972 | Paolo Bonzini | } |
1127 | db1a4972 | Paolo Bonzini | |
1128 | db1a4972 | Paolo Bonzini | int qemu_calculate_timeout(void) |
1129 | db1a4972 | Paolo Bonzini | { |
1130 | 1ece93a9 | Paolo Bonzini | #ifndef CONFIG_IOTHREAD
|
1131 | db1a4972 | Paolo Bonzini | int timeout;
|
1132 | db1a4972 | Paolo Bonzini | |
1133 | 1ece93a9 | Paolo Bonzini | if (!vm_running)
|
1134 | 1ece93a9 | Paolo Bonzini | timeout = 5000;
|
1135 | 1ece93a9 | Paolo Bonzini | else {
|
1136 | 1ece93a9 | Paolo Bonzini | /* XXX: use timeout computed from timers */
|
1137 | 1ece93a9 | Paolo Bonzini | int64_t add; |
1138 | 1ece93a9 | Paolo Bonzini | int64_t delta; |
1139 | 1ece93a9 | Paolo Bonzini | /* Advance virtual time to the next event. */
|
1140 | 1ece93a9 | Paolo Bonzini | delta = qemu_icount_delta(); |
1141 | 1ece93a9 | Paolo Bonzini | if (delta > 0) { |
1142 | 1ece93a9 | Paolo Bonzini | /* If virtual time is ahead of real time then just
|
1143 | 1ece93a9 | Paolo Bonzini | wait for IO. */
|
1144 | 1ece93a9 | Paolo Bonzini | timeout = (delta + 999999) / 1000000; |
1145 | 1ece93a9 | Paolo Bonzini | } else {
|
1146 | 1ece93a9 | Paolo Bonzini | /* Wait for either IO to occur or the next
|
1147 | 1ece93a9 | Paolo Bonzini | timer event. */
|
1148 | cb842c90 | Paolo Bonzini | add = qemu_next_icount_deadline(); |
1149 | 1ece93a9 | Paolo Bonzini | /* We advance the timer before checking for IO.
|
1150 | 1ece93a9 | Paolo Bonzini | Limit the amount we advance so that early IO
|
1151 | 1ece93a9 | Paolo Bonzini | activity won't get the guest too far ahead. */
|
1152 | 1ece93a9 | Paolo Bonzini | if (add > 10000000) |
1153 | 1ece93a9 | Paolo Bonzini | add = 10000000;
|
1154 | 1ece93a9 | Paolo Bonzini | delta += add; |
1155 | 1ece93a9 | Paolo Bonzini | qemu_icount += qemu_icount_round (add); |
1156 | 1ece93a9 | Paolo Bonzini | timeout = delta / 1000000;
|
1157 | 1ece93a9 | Paolo Bonzini | if (timeout < 0) |
1158 | 1ece93a9 | Paolo Bonzini | timeout = 0;
|
1159 | 1ece93a9 | Paolo Bonzini | } |
1160 | db1a4972 | Paolo Bonzini | } |
1161 | db1a4972 | Paolo Bonzini | |
1162 | db1a4972 | Paolo Bonzini | return timeout;
|
1163 | 1ece93a9 | Paolo Bonzini | #else /* CONFIG_IOTHREAD */ |
1164 | 1ece93a9 | Paolo Bonzini | return 1000; |
1165 | 1ece93a9 | Paolo Bonzini | #endif
|
1166 | db1a4972 | Paolo Bonzini | } |