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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 __linux__
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43 | db1a4972 | Paolo Bonzini | #include <sys/ioctl.h> |
44 | db1a4972 | Paolo Bonzini | #include <linux/rtc.h> |
45 | db1a4972 | Paolo Bonzini | /* For the benefit of older linux systems which don't supply it,
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46 | db1a4972 | Paolo Bonzini | we use a local copy of hpet.h. */
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47 | db1a4972 | Paolo Bonzini | /* #include <linux/hpet.h> */
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48 | db1a4972 | Paolo Bonzini | #include "hpet.h" |
49 | db1a4972 | Paolo Bonzini | #endif
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50 | db1a4972 | Paolo Bonzini | |
51 | db1a4972 | Paolo Bonzini | #ifdef _WIN32
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52 | db1a4972 | Paolo Bonzini | #include <windows.h> |
53 | db1a4972 | Paolo Bonzini | #include <mmsystem.h> |
54 | db1a4972 | Paolo Bonzini | #endif
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55 | db1a4972 | Paolo Bonzini | |
56 | db1a4972 | Paolo Bonzini | #include "qemu-timer.h" |
57 | db1a4972 | Paolo Bonzini | |
58 | db1a4972 | Paolo Bonzini | /* Conversion factor from emulated instructions to virtual clock ticks. */
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59 | 29e922b6 | Blue Swirl | int icount_time_shift;
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60 | db1a4972 | Paolo Bonzini | /* Arbitrarily pick 1MIPS as the minimum allowable speed. */
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61 | db1a4972 | Paolo Bonzini | #define MAX_ICOUNT_SHIFT 10 |
62 | db1a4972 | Paolo Bonzini | /* Compensate for varying guest execution speed. */
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63 | 29e922b6 | Blue Swirl | int64_t qemu_icount_bias; |
64 | db1a4972 | Paolo Bonzini | static QEMUTimer *icount_rt_timer;
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65 | db1a4972 | Paolo Bonzini | static QEMUTimer *icount_vm_timer;
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66 | db1a4972 | Paolo Bonzini | |
67 | db1a4972 | Paolo Bonzini | /***********************************************************/
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68 | db1a4972 | Paolo Bonzini | /* guest cycle counter */
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69 | db1a4972 | Paolo Bonzini | |
70 | db1a4972 | Paolo Bonzini | typedef struct TimersState { |
71 | db1a4972 | Paolo Bonzini | int64_t cpu_ticks_prev; |
72 | db1a4972 | Paolo Bonzini | int64_t cpu_ticks_offset; |
73 | db1a4972 | Paolo Bonzini | int64_t cpu_clock_offset; |
74 | db1a4972 | Paolo Bonzini | int32_t cpu_ticks_enabled; |
75 | db1a4972 | Paolo Bonzini | int64_t dummy; |
76 | db1a4972 | Paolo Bonzini | } TimersState; |
77 | db1a4972 | Paolo Bonzini | |
78 | db1a4972 | Paolo Bonzini | TimersState timers_state; |
79 | db1a4972 | Paolo Bonzini | |
80 | db1a4972 | Paolo Bonzini | /* return the host CPU cycle counter and handle stop/restart */
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81 | db1a4972 | Paolo Bonzini | int64_t cpu_get_ticks(void)
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82 | db1a4972 | Paolo Bonzini | { |
83 | db1a4972 | Paolo Bonzini | if (use_icount) {
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84 | db1a4972 | Paolo Bonzini | return cpu_get_icount();
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85 | db1a4972 | Paolo Bonzini | } |
86 | db1a4972 | Paolo Bonzini | if (!timers_state.cpu_ticks_enabled) {
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87 | db1a4972 | Paolo Bonzini | return timers_state.cpu_ticks_offset;
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88 | db1a4972 | Paolo Bonzini | } else {
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89 | db1a4972 | Paolo Bonzini | int64_t ticks; |
90 | db1a4972 | Paolo Bonzini | ticks = cpu_get_real_ticks(); |
91 | db1a4972 | Paolo Bonzini | if (timers_state.cpu_ticks_prev > ticks) {
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92 | db1a4972 | Paolo Bonzini | /* Note: non increasing ticks may happen if the host uses
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93 | db1a4972 | Paolo Bonzini | software suspend */
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94 | db1a4972 | Paolo Bonzini | timers_state.cpu_ticks_offset += timers_state.cpu_ticks_prev - ticks; |
95 | db1a4972 | Paolo Bonzini | } |
96 | db1a4972 | Paolo Bonzini | timers_state.cpu_ticks_prev = ticks; |
97 | db1a4972 | Paolo Bonzini | return ticks + timers_state.cpu_ticks_offset;
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98 | db1a4972 | Paolo Bonzini | } |
99 | db1a4972 | Paolo Bonzini | } |
100 | db1a4972 | Paolo Bonzini | |
101 | db1a4972 | Paolo Bonzini | /* return the host CPU monotonic timer and handle stop/restart */
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102 | db1a4972 | Paolo Bonzini | static int64_t cpu_get_clock(void) |
103 | db1a4972 | Paolo Bonzini | { |
104 | db1a4972 | Paolo Bonzini | int64_t ti; |
105 | db1a4972 | Paolo Bonzini | if (!timers_state.cpu_ticks_enabled) {
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106 | db1a4972 | Paolo Bonzini | return timers_state.cpu_clock_offset;
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107 | db1a4972 | Paolo Bonzini | } else {
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108 | db1a4972 | Paolo Bonzini | ti = get_clock(); |
109 | db1a4972 | Paolo Bonzini | return ti + timers_state.cpu_clock_offset;
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110 | db1a4972 | Paolo Bonzini | } |
111 | db1a4972 | Paolo Bonzini | } |
112 | db1a4972 | Paolo Bonzini | |
113 | db1a4972 | Paolo Bonzini | static int64_t qemu_icount_delta(void) |
114 | db1a4972 | Paolo Bonzini | { |
115 | c9f7383c | Paolo Bonzini | if (use_icount == 1) { |
116 | db1a4972 | Paolo Bonzini | /* When not using an adaptive execution frequency
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117 | db1a4972 | Paolo Bonzini | we tend to get badly out of sync with real time,
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118 | db1a4972 | Paolo Bonzini | so just delay for a reasonable amount of time. */
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119 | db1a4972 | Paolo Bonzini | return 0; |
120 | db1a4972 | Paolo Bonzini | } else {
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121 | db1a4972 | Paolo Bonzini | return cpu_get_icount() - cpu_get_clock();
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122 | db1a4972 | Paolo Bonzini | } |
123 | db1a4972 | Paolo Bonzini | } |
124 | db1a4972 | Paolo Bonzini | |
125 | db1a4972 | Paolo Bonzini | /* enable cpu_get_ticks() */
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126 | db1a4972 | Paolo Bonzini | void cpu_enable_ticks(void) |
127 | db1a4972 | Paolo Bonzini | { |
128 | db1a4972 | Paolo Bonzini | if (!timers_state.cpu_ticks_enabled) {
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129 | db1a4972 | Paolo Bonzini | timers_state.cpu_ticks_offset -= cpu_get_real_ticks(); |
130 | db1a4972 | Paolo Bonzini | timers_state.cpu_clock_offset -= get_clock(); |
131 | db1a4972 | Paolo Bonzini | timers_state.cpu_ticks_enabled = 1;
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132 | db1a4972 | Paolo Bonzini | } |
133 | db1a4972 | Paolo Bonzini | } |
134 | db1a4972 | Paolo Bonzini | |
135 | db1a4972 | Paolo Bonzini | /* disable cpu_get_ticks() : the clock is stopped. You must not call
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136 | db1a4972 | Paolo Bonzini | cpu_get_ticks() after that. */
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137 | db1a4972 | Paolo Bonzini | void cpu_disable_ticks(void) |
138 | db1a4972 | Paolo Bonzini | { |
139 | db1a4972 | Paolo Bonzini | if (timers_state.cpu_ticks_enabled) {
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140 | db1a4972 | Paolo Bonzini | timers_state.cpu_ticks_offset = cpu_get_ticks(); |
141 | db1a4972 | Paolo Bonzini | timers_state.cpu_clock_offset = cpu_get_clock(); |
142 | db1a4972 | Paolo Bonzini | timers_state.cpu_ticks_enabled = 0;
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143 | db1a4972 | Paolo Bonzini | } |
144 | db1a4972 | Paolo Bonzini | } |
145 | db1a4972 | Paolo Bonzini | |
146 | db1a4972 | Paolo Bonzini | /***********************************************************/
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147 | db1a4972 | Paolo Bonzini | /* timers */
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148 | db1a4972 | Paolo Bonzini | |
149 | db1a4972 | Paolo Bonzini | #define QEMU_CLOCK_REALTIME 0 |
150 | db1a4972 | Paolo Bonzini | #define QEMU_CLOCK_VIRTUAL 1 |
151 | db1a4972 | Paolo Bonzini | #define QEMU_CLOCK_HOST 2 |
152 | db1a4972 | Paolo Bonzini | |
153 | db1a4972 | Paolo Bonzini | struct QEMUClock {
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154 | db1a4972 | Paolo Bonzini | int type;
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155 | db1a4972 | Paolo Bonzini | int enabled;
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156 | db1a4972 | Paolo Bonzini | /* XXX: add frequency */
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157 | db1a4972 | Paolo Bonzini | }; |
158 | db1a4972 | Paolo Bonzini | |
159 | db1a4972 | Paolo Bonzini | struct QEMUTimer {
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160 | db1a4972 | Paolo Bonzini | QEMUClock *clock; |
161 | db1a4972 | Paolo Bonzini | int64_t expire_time; |
162 | db1a4972 | Paolo Bonzini | QEMUTimerCB *cb; |
163 | db1a4972 | Paolo Bonzini | void *opaque;
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164 | db1a4972 | Paolo Bonzini | struct QEMUTimer *next;
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165 | db1a4972 | Paolo Bonzini | }; |
166 | db1a4972 | Paolo Bonzini | |
167 | db1a4972 | Paolo Bonzini | struct qemu_alarm_timer {
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168 | db1a4972 | Paolo Bonzini | char const *name; |
169 | db1a4972 | Paolo Bonzini | int (*start)(struct qemu_alarm_timer *t); |
170 | db1a4972 | Paolo Bonzini | void (*stop)(struct qemu_alarm_timer *t); |
171 | db1a4972 | Paolo Bonzini | void (*rearm)(struct qemu_alarm_timer *t); |
172 | db1a4972 | Paolo Bonzini | void *priv;
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173 | db1a4972 | Paolo Bonzini | |
174 | db1a4972 | Paolo Bonzini | char expired;
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175 | db1a4972 | Paolo Bonzini | char pending;
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176 | db1a4972 | Paolo Bonzini | }; |
177 | db1a4972 | Paolo Bonzini | |
178 | db1a4972 | Paolo Bonzini | static struct qemu_alarm_timer *alarm_timer; |
179 | db1a4972 | Paolo Bonzini | |
180 | db1a4972 | Paolo Bonzini | int qemu_alarm_pending(void) |
181 | db1a4972 | Paolo Bonzini | { |
182 | db1a4972 | Paolo Bonzini | return alarm_timer->pending;
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183 | db1a4972 | Paolo Bonzini | } |
184 | db1a4972 | Paolo Bonzini | |
185 | db1a4972 | Paolo Bonzini | static inline int alarm_has_dynticks(struct qemu_alarm_timer *t) |
186 | db1a4972 | Paolo Bonzini | { |
187 | db1a4972 | Paolo Bonzini | return !!t->rearm;
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188 | db1a4972 | Paolo Bonzini | } |
189 | db1a4972 | Paolo Bonzini | |
190 | db1a4972 | Paolo Bonzini | static void qemu_rearm_alarm_timer(struct qemu_alarm_timer *t) |
191 | db1a4972 | Paolo Bonzini | { |
192 | db1a4972 | Paolo Bonzini | if (!alarm_has_dynticks(t))
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193 | db1a4972 | Paolo Bonzini | return;
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194 | db1a4972 | Paolo Bonzini | |
195 | db1a4972 | Paolo Bonzini | t->rearm(t); |
196 | db1a4972 | Paolo Bonzini | } |
197 | db1a4972 | Paolo Bonzini | |
198 | 9c13246a | Paolo Bonzini | /* TODO: MIN_TIMER_REARM_NS should be optimized */
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199 | 9c13246a | Paolo Bonzini | #define MIN_TIMER_REARM_NS 250000 |
200 | db1a4972 | Paolo Bonzini | |
201 | db1a4972 | Paolo Bonzini | #ifdef _WIN32
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202 | db1a4972 | Paolo Bonzini | |
203 | db1a4972 | Paolo Bonzini | static int win32_start_timer(struct qemu_alarm_timer *t); |
204 | db1a4972 | Paolo Bonzini | static void win32_stop_timer(struct qemu_alarm_timer *t); |
205 | db1a4972 | Paolo Bonzini | static void win32_rearm_timer(struct qemu_alarm_timer *t); |
206 | db1a4972 | Paolo Bonzini | |
207 | db1a4972 | Paolo Bonzini | #else
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208 | db1a4972 | Paolo Bonzini | |
209 | db1a4972 | Paolo Bonzini | static int unix_start_timer(struct qemu_alarm_timer *t); |
210 | db1a4972 | Paolo Bonzini | static void unix_stop_timer(struct qemu_alarm_timer *t); |
211 | db1a4972 | Paolo Bonzini | |
212 | db1a4972 | Paolo Bonzini | #ifdef __linux__
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213 | db1a4972 | Paolo Bonzini | |
214 | db1a4972 | Paolo Bonzini | static int dynticks_start_timer(struct qemu_alarm_timer *t); |
215 | db1a4972 | Paolo Bonzini | static void dynticks_stop_timer(struct qemu_alarm_timer *t); |
216 | db1a4972 | Paolo Bonzini | static void dynticks_rearm_timer(struct qemu_alarm_timer *t); |
217 | db1a4972 | Paolo Bonzini | |
218 | db1a4972 | Paolo Bonzini | static int hpet_start_timer(struct qemu_alarm_timer *t); |
219 | db1a4972 | Paolo Bonzini | static void hpet_stop_timer(struct qemu_alarm_timer *t); |
220 | db1a4972 | Paolo Bonzini | |
221 | db1a4972 | Paolo Bonzini | static int rtc_start_timer(struct qemu_alarm_timer *t); |
222 | db1a4972 | Paolo Bonzini | static void rtc_stop_timer(struct qemu_alarm_timer *t); |
223 | db1a4972 | Paolo Bonzini | |
224 | db1a4972 | Paolo Bonzini | #endif /* __linux__ */ |
225 | db1a4972 | Paolo Bonzini | |
226 | db1a4972 | Paolo Bonzini | #endif /* _WIN32 */ |
227 | db1a4972 | Paolo Bonzini | |
228 | db1a4972 | Paolo Bonzini | /* Correlation between real and virtual time is always going to be
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229 | db1a4972 | Paolo Bonzini | fairly approximate, so ignore small variation.
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230 | db1a4972 | Paolo Bonzini | When the guest is idle real and virtual time will be aligned in
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231 | db1a4972 | Paolo Bonzini | the IO wait loop. */
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232 | db1a4972 | Paolo Bonzini | #define ICOUNT_WOBBLE (get_ticks_per_sec() / 10) |
233 | db1a4972 | Paolo Bonzini | |
234 | db1a4972 | Paolo Bonzini | static void icount_adjust(void) |
235 | db1a4972 | Paolo Bonzini | { |
236 | db1a4972 | Paolo Bonzini | int64_t cur_time; |
237 | db1a4972 | Paolo Bonzini | int64_t cur_icount; |
238 | db1a4972 | Paolo Bonzini | int64_t delta; |
239 | db1a4972 | Paolo Bonzini | static int64_t last_delta;
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240 | db1a4972 | Paolo Bonzini | /* If the VM is not running, then do nothing. */
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241 | db1a4972 | Paolo Bonzini | if (!vm_running)
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242 | db1a4972 | Paolo Bonzini | return;
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243 | db1a4972 | Paolo Bonzini | |
244 | db1a4972 | Paolo Bonzini | cur_time = cpu_get_clock(); |
245 | db1a4972 | Paolo Bonzini | cur_icount = qemu_get_clock(vm_clock); |
246 | db1a4972 | Paolo Bonzini | delta = cur_icount - cur_time; |
247 | db1a4972 | Paolo Bonzini | /* FIXME: This is a very crude algorithm, somewhat prone to oscillation. */
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248 | db1a4972 | Paolo Bonzini | if (delta > 0 |
249 | db1a4972 | Paolo Bonzini | && last_delta + ICOUNT_WOBBLE < delta * 2
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250 | db1a4972 | Paolo Bonzini | && icount_time_shift > 0) {
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251 | db1a4972 | Paolo Bonzini | /* The guest is getting too far ahead. Slow time down. */
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252 | db1a4972 | Paolo Bonzini | icount_time_shift--; |
253 | db1a4972 | Paolo Bonzini | } |
254 | db1a4972 | Paolo Bonzini | if (delta < 0 |
255 | db1a4972 | Paolo Bonzini | && last_delta - ICOUNT_WOBBLE > delta * 2
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256 | db1a4972 | Paolo Bonzini | && icount_time_shift < MAX_ICOUNT_SHIFT) { |
257 | db1a4972 | Paolo Bonzini | /* The guest is getting too far behind. Speed time up. */
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258 | db1a4972 | Paolo Bonzini | icount_time_shift++; |
259 | db1a4972 | Paolo Bonzini | } |
260 | db1a4972 | Paolo Bonzini | last_delta = delta; |
261 | db1a4972 | Paolo Bonzini | qemu_icount_bias = cur_icount - (qemu_icount << icount_time_shift); |
262 | db1a4972 | Paolo Bonzini | } |
263 | db1a4972 | Paolo Bonzini | |
264 | db1a4972 | Paolo Bonzini | static void icount_adjust_rt(void * opaque) |
265 | db1a4972 | Paolo Bonzini | { |
266 | db1a4972 | Paolo Bonzini | qemu_mod_timer(icount_rt_timer, |
267 | db1a4972 | Paolo Bonzini | qemu_get_clock(rt_clock) + 1000);
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268 | db1a4972 | Paolo Bonzini | icount_adjust(); |
269 | db1a4972 | Paolo Bonzini | } |
270 | db1a4972 | Paolo Bonzini | |
271 | db1a4972 | Paolo Bonzini | static void icount_adjust_vm(void * opaque) |
272 | db1a4972 | Paolo Bonzini | { |
273 | db1a4972 | Paolo Bonzini | qemu_mod_timer(icount_vm_timer, |
274 | db1a4972 | Paolo Bonzini | qemu_get_clock(vm_clock) + get_ticks_per_sec() / 10);
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275 | db1a4972 | Paolo Bonzini | icount_adjust(); |
276 | db1a4972 | Paolo Bonzini | } |
277 | db1a4972 | Paolo Bonzini | |
278 | db1a4972 | Paolo Bonzini | int64_t qemu_icount_round(int64_t count) |
279 | db1a4972 | Paolo Bonzini | { |
280 | db1a4972 | Paolo Bonzini | return (count + (1 << icount_time_shift) - 1) >> icount_time_shift; |
281 | db1a4972 | Paolo Bonzini | } |
282 | db1a4972 | Paolo Bonzini | |
283 | db1a4972 | Paolo Bonzini | static struct qemu_alarm_timer alarm_timers[] = { |
284 | db1a4972 | Paolo Bonzini | #ifndef _WIN32
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285 | db1a4972 | Paolo Bonzini | #ifdef __linux__
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286 | db1a4972 | Paolo Bonzini | {"dynticks", dynticks_start_timer,
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287 | db1a4972 | Paolo Bonzini | dynticks_stop_timer, dynticks_rearm_timer, NULL},
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288 | db1a4972 | Paolo Bonzini | /* HPET - if available - is preferred */
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289 | db1a4972 | Paolo Bonzini | {"hpet", hpet_start_timer, hpet_stop_timer, NULL, NULL}, |
290 | db1a4972 | Paolo Bonzini | /* ...otherwise try RTC */
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291 | db1a4972 | Paolo Bonzini | {"rtc", rtc_start_timer, rtc_stop_timer, NULL, NULL}, |
292 | db1a4972 | Paolo Bonzini | #endif
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293 | db1a4972 | Paolo Bonzini | {"unix", unix_start_timer, unix_stop_timer, NULL, NULL}, |
294 | db1a4972 | Paolo Bonzini | #else
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295 | db1a4972 | Paolo Bonzini | {"dynticks", win32_start_timer,
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296 | 68c23e55 | Paolo Bonzini | win32_stop_timer, win32_rearm_timer, NULL},
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297 | db1a4972 | Paolo Bonzini | {"win32", win32_start_timer,
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298 | 68c23e55 | Paolo Bonzini | win32_stop_timer, NULL, 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;
|
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 | db1a4972 | Paolo Bonzini | QEMUTimer *qemu_new_timer(QEMUClock *clock, QEMUTimerCB *cb, void *opaque)
|
390 | db1a4972 | Paolo Bonzini | { |
391 | db1a4972 | Paolo Bonzini | QEMUTimer *ts; |
392 | db1a4972 | Paolo Bonzini | |
393 | db1a4972 | Paolo Bonzini | ts = qemu_mallocz(sizeof(QEMUTimer));
|
394 | db1a4972 | Paolo Bonzini | ts->clock = clock; |
395 | db1a4972 | Paolo Bonzini | ts->cb = cb; |
396 | db1a4972 | Paolo Bonzini | ts->opaque = opaque; |
397 | db1a4972 | Paolo Bonzini | return ts;
|
398 | db1a4972 | Paolo Bonzini | } |
399 | db1a4972 | Paolo Bonzini | |
400 | db1a4972 | Paolo Bonzini | void qemu_free_timer(QEMUTimer *ts)
|
401 | db1a4972 | Paolo Bonzini | { |
402 | db1a4972 | Paolo Bonzini | qemu_free(ts); |
403 | db1a4972 | Paolo Bonzini | } |
404 | db1a4972 | Paolo Bonzini | |
405 | db1a4972 | Paolo Bonzini | /* stop a timer, but do not dealloc it */
|
406 | db1a4972 | Paolo Bonzini | void qemu_del_timer(QEMUTimer *ts)
|
407 | db1a4972 | Paolo Bonzini | { |
408 | db1a4972 | Paolo Bonzini | QEMUTimer **pt, *t; |
409 | db1a4972 | Paolo Bonzini | |
410 | db1a4972 | Paolo Bonzini | /* NOTE: this code must be signal safe because
|
411 | db1a4972 | Paolo Bonzini | qemu_timer_expired() can be called from a signal. */
|
412 | db1a4972 | Paolo Bonzini | pt = &active_timers[ts->clock->type]; |
413 | db1a4972 | Paolo Bonzini | for(;;) {
|
414 | db1a4972 | Paolo Bonzini | t = *pt; |
415 | db1a4972 | Paolo Bonzini | if (!t)
|
416 | db1a4972 | Paolo Bonzini | break;
|
417 | db1a4972 | Paolo Bonzini | if (t == ts) {
|
418 | db1a4972 | Paolo Bonzini | *pt = t->next; |
419 | db1a4972 | Paolo Bonzini | break;
|
420 | db1a4972 | Paolo Bonzini | } |
421 | db1a4972 | Paolo Bonzini | pt = &t->next; |
422 | db1a4972 | Paolo Bonzini | } |
423 | db1a4972 | Paolo Bonzini | } |
424 | db1a4972 | Paolo Bonzini | |
425 | db1a4972 | Paolo Bonzini | /* modify the current timer so that it will be fired when current_time
|
426 | db1a4972 | Paolo Bonzini | >= expire_time. The corresponding callback will be called. */
|
427 | db1a4972 | Paolo Bonzini | void qemu_mod_timer(QEMUTimer *ts, int64_t expire_time)
|
428 | db1a4972 | Paolo Bonzini | { |
429 | db1a4972 | Paolo Bonzini | QEMUTimer **pt, *t; |
430 | db1a4972 | Paolo Bonzini | |
431 | db1a4972 | Paolo Bonzini | qemu_del_timer(ts); |
432 | db1a4972 | Paolo Bonzini | |
433 | db1a4972 | Paolo Bonzini | /* add the timer in the sorted list */
|
434 | db1a4972 | Paolo Bonzini | /* NOTE: this code must be signal safe because
|
435 | db1a4972 | Paolo Bonzini | qemu_timer_expired() can be called from a signal. */
|
436 | db1a4972 | Paolo Bonzini | pt = &active_timers[ts->clock->type]; |
437 | db1a4972 | Paolo Bonzini | for(;;) {
|
438 | db1a4972 | Paolo Bonzini | t = *pt; |
439 | db1a4972 | Paolo Bonzini | if (!t)
|
440 | db1a4972 | Paolo Bonzini | break;
|
441 | db1a4972 | Paolo Bonzini | if (t->expire_time > expire_time)
|
442 | db1a4972 | Paolo Bonzini | break;
|
443 | db1a4972 | Paolo Bonzini | pt = &t->next; |
444 | db1a4972 | Paolo Bonzini | } |
445 | db1a4972 | Paolo Bonzini | ts->expire_time = expire_time; |
446 | db1a4972 | Paolo Bonzini | ts->next = *pt; |
447 | db1a4972 | Paolo Bonzini | *pt = ts; |
448 | db1a4972 | Paolo Bonzini | |
449 | db1a4972 | Paolo Bonzini | /* Rearm if necessary */
|
450 | db1a4972 | Paolo Bonzini | if (pt == &active_timers[ts->clock->type]) {
|
451 | db1a4972 | Paolo Bonzini | if (!alarm_timer->pending) {
|
452 | db1a4972 | Paolo Bonzini | qemu_rearm_alarm_timer(alarm_timer); |
453 | db1a4972 | Paolo Bonzini | } |
454 | db1a4972 | Paolo Bonzini | /* Interrupt execution to force deadline recalculation. */
|
455 | db1a4972 | Paolo Bonzini | if (use_icount)
|
456 | db1a4972 | Paolo Bonzini | qemu_notify_event(); |
457 | db1a4972 | Paolo Bonzini | } |
458 | db1a4972 | Paolo Bonzini | } |
459 | db1a4972 | Paolo Bonzini | |
460 | db1a4972 | Paolo Bonzini | int qemu_timer_pending(QEMUTimer *ts)
|
461 | db1a4972 | Paolo Bonzini | { |
462 | db1a4972 | Paolo Bonzini | QEMUTimer *t; |
463 | db1a4972 | Paolo Bonzini | for(t = active_timers[ts->clock->type]; t != NULL; t = t->next) { |
464 | db1a4972 | Paolo Bonzini | if (t == ts)
|
465 | db1a4972 | Paolo Bonzini | return 1; |
466 | db1a4972 | Paolo Bonzini | } |
467 | db1a4972 | Paolo Bonzini | return 0; |
468 | db1a4972 | Paolo Bonzini | } |
469 | db1a4972 | Paolo Bonzini | |
470 | db1a4972 | Paolo Bonzini | int qemu_timer_expired(QEMUTimer *timer_head, int64_t current_time)
|
471 | db1a4972 | Paolo Bonzini | { |
472 | db1a4972 | Paolo Bonzini | if (!timer_head)
|
473 | db1a4972 | Paolo Bonzini | return 0; |
474 | db1a4972 | Paolo Bonzini | return (timer_head->expire_time <= current_time);
|
475 | db1a4972 | Paolo Bonzini | } |
476 | db1a4972 | Paolo Bonzini | |
477 | db1a4972 | Paolo Bonzini | static void qemu_run_timers(QEMUClock *clock) |
478 | db1a4972 | Paolo Bonzini | { |
479 | db1a4972 | Paolo Bonzini | QEMUTimer **ptimer_head, *ts; |
480 | db1a4972 | Paolo Bonzini | int64_t current_time; |
481 | db1a4972 | Paolo Bonzini | |
482 | db1a4972 | Paolo Bonzini | if (!clock->enabled)
|
483 | db1a4972 | Paolo Bonzini | return;
|
484 | db1a4972 | Paolo Bonzini | |
485 | db1a4972 | Paolo Bonzini | current_time = qemu_get_clock (clock); |
486 | db1a4972 | Paolo Bonzini | ptimer_head = &active_timers[clock->type]; |
487 | db1a4972 | Paolo Bonzini | for(;;) {
|
488 | db1a4972 | Paolo Bonzini | ts = *ptimer_head; |
489 | db1a4972 | Paolo Bonzini | if (!ts || ts->expire_time > current_time)
|
490 | db1a4972 | Paolo Bonzini | break;
|
491 | db1a4972 | Paolo Bonzini | /* remove timer from the list before calling the callback */
|
492 | db1a4972 | Paolo Bonzini | *ptimer_head = ts->next; |
493 | db1a4972 | Paolo Bonzini | ts->next = NULL;
|
494 | db1a4972 | Paolo Bonzini | |
495 | db1a4972 | Paolo Bonzini | /* run the callback (the timer list can be modified) */
|
496 | db1a4972 | Paolo Bonzini | ts->cb(ts->opaque); |
497 | db1a4972 | Paolo Bonzini | } |
498 | db1a4972 | Paolo Bonzini | } |
499 | db1a4972 | Paolo Bonzini | |
500 | db1a4972 | Paolo Bonzini | int64_t qemu_get_clock(QEMUClock *clock) |
501 | db1a4972 | Paolo Bonzini | { |
502 | db1a4972 | Paolo Bonzini | switch(clock->type) {
|
503 | db1a4972 | Paolo Bonzini | case QEMU_CLOCK_REALTIME:
|
504 | db1a4972 | Paolo Bonzini | return get_clock() / 1000000; |
505 | db1a4972 | Paolo Bonzini | default:
|
506 | db1a4972 | Paolo Bonzini | case QEMU_CLOCK_VIRTUAL:
|
507 | db1a4972 | Paolo Bonzini | if (use_icount) {
|
508 | db1a4972 | Paolo Bonzini | return cpu_get_icount();
|
509 | db1a4972 | Paolo Bonzini | } else {
|
510 | db1a4972 | Paolo Bonzini | return cpu_get_clock();
|
511 | db1a4972 | Paolo Bonzini | } |
512 | db1a4972 | Paolo Bonzini | case QEMU_CLOCK_HOST:
|
513 | db1a4972 | Paolo Bonzini | return get_clock_realtime();
|
514 | db1a4972 | Paolo Bonzini | } |
515 | db1a4972 | Paolo Bonzini | } |
516 | db1a4972 | Paolo Bonzini | |
517 | db1a4972 | Paolo Bonzini | int64_t qemu_get_clock_ns(QEMUClock *clock) |
518 | db1a4972 | Paolo Bonzini | { |
519 | db1a4972 | Paolo Bonzini | switch(clock->type) {
|
520 | db1a4972 | Paolo Bonzini | case QEMU_CLOCK_REALTIME:
|
521 | db1a4972 | Paolo Bonzini | return get_clock();
|
522 | db1a4972 | Paolo Bonzini | default:
|
523 | db1a4972 | Paolo Bonzini | case QEMU_CLOCK_VIRTUAL:
|
524 | db1a4972 | Paolo Bonzini | if (use_icount) {
|
525 | db1a4972 | Paolo Bonzini | return cpu_get_icount();
|
526 | db1a4972 | Paolo Bonzini | } else {
|
527 | db1a4972 | Paolo Bonzini | return cpu_get_clock();
|
528 | db1a4972 | Paolo Bonzini | } |
529 | db1a4972 | Paolo Bonzini | case QEMU_CLOCK_HOST:
|
530 | db1a4972 | Paolo Bonzini | return get_clock_realtime();
|
531 | db1a4972 | Paolo Bonzini | } |
532 | db1a4972 | Paolo Bonzini | } |
533 | db1a4972 | Paolo Bonzini | |
534 | db1a4972 | Paolo Bonzini | void init_clocks(void) |
535 | db1a4972 | Paolo Bonzini | { |
536 | db1a4972 | Paolo Bonzini | rt_clock = qemu_new_clock(QEMU_CLOCK_REALTIME); |
537 | db1a4972 | Paolo Bonzini | vm_clock = qemu_new_clock(QEMU_CLOCK_VIRTUAL); |
538 | db1a4972 | Paolo Bonzini | host_clock = qemu_new_clock(QEMU_CLOCK_HOST); |
539 | db1a4972 | Paolo Bonzini | |
540 | db1a4972 | Paolo Bonzini | rtc_clock = host_clock; |
541 | db1a4972 | Paolo Bonzini | } |
542 | db1a4972 | Paolo Bonzini | |
543 | db1a4972 | Paolo Bonzini | /* save a timer */
|
544 | db1a4972 | Paolo Bonzini | void qemu_put_timer(QEMUFile *f, QEMUTimer *ts)
|
545 | db1a4972 | Paolo Bonzini | { |
546 | db1a4972 | Paolo Bonzini | uint64_t expire_time; |
547 | db1a4972 | Paolo Bonzini | |
548 | db1a4972 | Paolo Bonzini | if (qemu_timer_pending(ts)) {
|
549 | db1a4972 | Paolo Bonzini | expire_time = ts->expire_time; |
550 | db1a4972 | Paolo Bonzini | } else {
|
551 | db1a4972 | Paolo Bonzini | expire_time = -1;
|
552 | db1a4972 | Paolo Bonzini | } |
553 | db1a4972 | Paolo Bonzini | qemu_put_be64(f, expire_time); |
554 | db1a4972 | Paolo Bonzini | } |
555 | db1a4972 | Paolo Bonzini | |
556 | db1a4972 | Paolo Bonzini | void qemu_get_timer(QEMUFile *f, QEMUTimer *ts)
|
557 | db1a4972 | Paolo Bonzini | { |
558 | db1a4972 | Paolo Bonzini | uint64_t expire_time; |
559 | db1a4972 | Paolo Bonzini | |
560 | db1a4972 | Paolo Bonzini | expire_time = qemu_get_be64(f); |
561 | db1a4972 | Paolo Bonzini | if (expire_time != -1) { |
562 | db1a4972 | Paolo Bonzini | qemu_mod_timer(ts, expire_time); |
563 | db1a4972 | Paolo Bonzini | } else {
|
564 | db1a4972 | Paolo Bonzini | qemu_del_timer(ts); |
565 | db1a4972 | Paolo Bonzini | } |
566 | db1a4972 | Paolo Bonzini | } |
567 | db1a4972 | Paolo Bonzini | |
568 | db1a4972 | Paolo Bonzini | static const VMStateDescription vmstate_timers = { |
569 | db1a4972 | Paolo Bonzini | .name = "timer",
|
570 | db1a4972 | Paolo Bonzini | .version_id = 2,
|
571 | db1a4972 | Paolo Bonzini | .minimum_version_id = 1,
|
572 | db1a4972 | Paolo Bonzini | .minimum_version_id_old = 1,
|
573 | db1a4972 | Paolo Bonzini | .fields = (VMStateField []) { |
574 | db1a4972 | Paolo Bonzini | VMSTATE_INT64(cpu_ticks_offset, TimersState), |
575 | db1a4972 | Paolo Bonzini | VMSTATE_INT64(dummy, TimersState), |
576 | db1a4972 | Paolo Bonzini | VMSTATE_INT64_V(cpu_clock_offset, TimersState, 2),
|
577 | db1a4972 | Paolo Bonzini | VMSTATE_END_OF_LIST() |
578 | db1a4972 | Paolo Bonzini | } |
579 | db1a4972 | Paolo Bonzini | }; |
580 | db1a4972 | Paolo Bonzini | |
581 | db1a4972 | Paolo Bonzini | void configure_icount(const char *option) |
582 | db1a4972 | Paolo Bonzini | { |
583 | 0be71e32 | Alex Williamson | vmstate_register(NULL, 0, &vmstate_timers, &timers_state); |
584 | db1a4972 | Paolo Bonzini | if (!option)
|
585 | db1a4972 | Paolo Bonzini | return;
|
586 | db1a4972 | Paolo Bonzini | |
587 | db1a4972 | Paolo Bonzini | if (strcmp(option, "auto") != 0) { |
588 | db1a4972 | Paolo Bonzini | icount_time_shift = strtol(option, NULL, 0); |
589 | db1a4972 | Paolo Bonzini | use_icount = 1;
|
590 | db1a4972 | Paolo Bonzini | return;
|
591 | db1a4972 | Paolo Bonzini | } |
592 | db1a4972 | Paolo Bonzini | |
593 | db1a4972 | Paolo Bonzini | use_icount = 2;
|
594 | db1a4972 | Paolo Bonzini | |
595 | db1a4972 | Paolo Bonzini | /* 125MIPS seems a reasonable initial guess at the guest speed.
|
596 | db1a4972 | Paolo Bonzini | It will be corrected fairly quickly anyway. */
|
597 | db1a4972 | Paolo Bonzini | icount_time_shift = 3;
|
598 | db1a4972 | Paolo Bonzini | |
599 | db1a4972 | Paolo Bonzini | /* Have both realtime and virtual time triggers for speed adjustment.
|
600 | db1a4972 | Paolo Bonzini | The realtime trigger catches emulated time passing too slowly,
|
601 | db1a4972 | Paolo Bonzini | the virtual time trigger catches emulated time passing too fast.
|
602 | db1a4972 | Paolo Bonzini | Realtime triggers occur even when idle, so use them less frequently
|
603 | db1a4972 | Paolo Bonzini | than VM triggers. */
|
604 | db1a4972 | Paolo Bonzini | icount_rt_timer = qemu_new_timer(rt_clock, icount_adjust_rt, NULL);
|
605 | db1a4972 | Paolo Bonzini | qemu_mod_timer(icount_rt_timer, |
606 | db1a4972 | Paolo Bonzini | qemu_get_clock(rt_clock) + 1000);
|
607 | db1a4972 | Paolo Bonzini | icount_vm_timer = qemu_new_timer(vm_clock, icount_adjust_vm, NULL);
|
608 | db1a4972 | Paolo Bonzini | qemu_mod_timer(icount_vm_timer, |
609 | db1a4972 | Paolo Bonzini | qemu_get_clock(vm_clock) + get_ticks_per_sec() / 10);
|
610 | db1a4972 | Paolo Bonzini | } |
611 | db1a4972 | Paolo Bonzini | |
612 | db1a4972 | Paolo Bonzini | void qemu_run_all_timers(void) |
613 | db1a4972 | Paolo Bonzini | { |
614 | ca5a2a4b | Paolo Bonzini | alarm_timer->pending = 0;
|
615 | ca5a2a4b | Paolo Bonzini | |
616 | db1a4972 | Paolo Bonzini | /* rearm timer, if not periodic */
|
617 | db1a4972 | Paolo Bonzini | if (alarm_timer->expired) {
|
618 | db1a4972 | Paolo Bonzini | alarm_timer->expired = 0;
|
619 | db1a4972 | Paolo Bonzini | qemu_rearm_alarm_timer(alarm_timer); |
620 | db1a4972 | Paolo Bonzini | } |
621 | db1a4972 | Paolo Bonzini | |
622 | db1a4972 | Paolo Bonzini | /* vm time timers */
|
623 | db1a4972 | Paolo Bonzini | if (vm_running) {
|
624 | db1a4972 | Paolo Bonzini | qemu_run_timers(vm_clock); |
625 | db1a4972 | Paolo Bonzini | } |
626 | db1a4972 | Paolo Bonzini | |
627 | db1a4972 | Paolo Bonzini | qemu_run_timers(rt_clock); |
628 | db1a4972 | Paolo Bonzini | qemu_run_timers(host_clock); |
629 | db1a4972 | Paolo Bonzini | } |
630 | db1a4972 | Paolo Bonzini | |
631 | 4c3d45eb | Paolo Bonzini | static int64_t qemu_next_alarm_deadline(void); |
632 | 4c3d45eb | Paolo Bonzini | |
633 | db1a4972 | Paolo Bonzini | #ifdef _WIN32
|
634 | 68c23e55 | Paolo Bonzini | static void CALLBACK host_alarm_handler(PVOID lpParam, BOOLEAN unused) |
635 | db1a4972 | Paolo Bonzini | #else
|
636 | db1a4972 | Paolo Bonzini | static void host_alarm_handler(int host_signum) |
637 | db1a4972 | Paolo Bonzini | #endif
|
638 | db1a4972 | Paolo Bonzini | { |
639 | db1a4972 | Paolo Bonzini | struct qemu_alarm_timer *t = alarm_timer;
|
640 | db1a4972 | Paolo Bonzini | if (!t)
|
641 | db1a4972 | Paolo Bonzini | return;
|
642 | db1a4972 | Paolo Bonzini | |
643 | db1a4972 | Paolo Bonzini | #if 0
|
644 | db1a4972 | Paolo Bonzini | #define DISP_FREQ 1000
|
645 | db1a4972 | Paolo Bonzini | {
|
646 | db1a4972 | Paolo Bonzini | static int64_t delta_min = INT64_MAX;
|
647 | db1a4972 | Paolo Bonzini | static int64_t delta_max, delta_cum, last_clock, delta, ti;
|
648 | db1a4972 | Paolo Bonzini | static int count;
|
649 | db1a4972 | Paolo Bonzini | ti = qemu_get_clock(vm_clock);
|
650 | db1a4972 | Paolo Bonzini | if (last_clock != 0) {
|
651 | db1a4972 | Paolo Bonzini | delta = ti - last_clock;
|
652 | db1a4972 | Paolo Bonzini | if (delta < delta_min)
|
653 | db1a4972 | Paolo Bonzini | delta_min = delta;
|
654 | db1a4972 | Paolo Bonzini | if (delta > delta_max)
|
655 | db1a4972 | Paolo Bonzini | delta_max = delta;
|
656 | db1a4972 | Paolo Bonzini | delta_cum += delta;
|
657 | db1a4972 | Paolo Bonzini | if (++count == DISP_FREQ) {
|
658 | db1a4972 | Paolo Bonzini | printf("timer: min=%" PRId64 " us max=%" PRId64 " us avg=%" PRId64 " us avg_freq=%0.3f Hz\n",
|
659 | db1a4972 | Paolo Bonzini | muldiv64(delta_min, 1000000, get_ticks_per_sec()),
|
660 | db1a4972 | Paolo Bonzini | muldiv64(delta_max, 1000000, get_ticks_per_sec()),
|
661 | db1a4972 | Paolo Bonzini | muldiv64(delta_cum, 1000000 / DISP_FREQ, get_ticks_per_sec()),
|
662 | db1a4972 | Paolo Bonzini | (double)get_ticks_per_sec() / ((double)delta_cum / DISP_FREQ));
|
663 | db1a4972 | Paolo Bonzini | count = 0;
|
664 | db1a4972 | Paolo Bonzini | delta_min = INT64_MAX;
|
665 | db1a4972 | Paolo Bonzini | delta_max = 0;
|
666 | db1a4972 | Paolo Bonzini | delta_cum = 0;
|
667 | db1a4972 | Paolo Bonzini | }
|
668 | db1a4972 | Paolo Bonzini | }
|
669 | db1a4972 | Paolo Bonzini | last_clock = ti;
|
670 | db1a4972 | Paolo Bonzini | }
|
671 | db1a4972 | Paolo Bonzini | #endif
|
672 | db1a4972 | Paolo Bonzini | if (alarm_has_dynticks(t) ||
|
673 | 4c3d45eb | Paolo Bonzini | qemu_next_alarm_deadline () <= 0) {
|
674 | db1a4972 | Paolo Bonzini | t->expired = alarm_has_dynticks(t); |
675 | db1a4972 | Paolo Bonzini | t->pending = 1;
|
676 | db1a4972 | Paolo Bonzini | qemu_notify_event(); |
677 | db1a4972 | Paolo Bonzini | } |
678 | db1a4972 | Paolo Bonzini | } |
679 | db1a4972 | Paolo Bonzini | |
680 | db1a4972 | Paolo Bonzini | int64_t qemu_next_deadline(void)
|
681 | db1a4972 | Paolo Bonzini | { |
682 | db1a4972 | Paolo Bonzini | /* To avoid problems with overflow limit this to 2^32. */
|
683 | db1a4972 | Paolo Bonzini | int64_t delta = INT32_MAX; |
684 | db1a4972 | Paolo Bonzini | |
685 | db1a4972 | Paolo Bonzini | if (active_timers[QEMU_CLOCK_VIRTUAL]) {
|
686 | db1a4972 | Paolo Bonzini | delta = active_timers[QEMU_CLOCK_VIRTUAL]->expire_time - |
687 | 9c13246a | Paolo Bonzini | qemu_get_clock_ns(vm_clock); |
688 | db1a4972 | Paolo Bonzini | } |
689 | db1a4972 | Paolo Bonzini | if (active_timers[QEMU_CLOCK_HOST]) {
|
690 | db1a4972 | Paolo Bonzini | int64_t hdelta = active_timers[QEMU_CLOCK_HOST]->expire_time - |
691 | 9c13246a | Paolo Bonzini | qemu_get_clock_ns(host_clock); |
692 | db1a4972 | Paolo Bonzini | if (hdelta < delta)
|
693 | db1a4972 | Paolo Bonzini | delta = hdelta; |
694 | db1a4972 | Paolo Bonzini | } |
695 | db1a4972 | Paolo Bonzini | |
696 | db1a4972 | Paolo Bonzini | if (delta < 0) |
697 | db1a4972 | Paolo Bonzini | delta = 0;
|
698 | db1a4972 | Paolo Bonzini | |
699 | db1a4972 | Paolo Bonzini | return delta;
|
700 | db1a4972 | Paolo Bonzini | } |
701 | db1a4972 | Paolo Bonzini | |
702 | 4c3d45eb | Paolo Bonzini | static int64_t qemu_next_alarm_deadline(void) |
703 | db1a4972 | Paolo Bonzini | { |
704 | db1a4972 | Paolo Bonzini | int64_t delta; |
705 | db1a4972 | Paolo Bonzini | int64_t rtdelta; |
706 | db1a4972 | Paolo Bonzini | |
707 | 6ad0a1ed | Paolo Bonzini | if (!use_icount && active_timers[QEMU_CLOCK_VIRTUAL]) {
|
708 | 6ad0a1ed | Paolo Bonzini | delta = active_timers[QEMU_CLOCK_VIRTUAL]->expire_time - |
709 | 6ad0a1ed | Paolo Bonzini | qemu_get_clock(vm_clock); |
710 | 6ad0a1ed | Paolo Bonzini | } else {
|
711 | db1a4972 | Paolo Bonzini | delta = INT32_MAX; |
712 | 6ad0a1ed | Paolo Bonzini | } |
713 | 6ad0a1ed | Paolo Bonzini | if (active_timers[QEMU_CLOCK_HOST]) {
|
714 | 6ad0a1ed | Paolo Bonzini | int64_t hdelta = active_timers[QEMU_CLOCK_HOST]->expire_time - |
715 | 6ad0a1ed | Paolo Bonzini | qemu_get_clock_ns(host_clock); |
716 | 6ad0a1ed | Paolo Bonzini | if (hdelta < delta)
|
717 | 6ad0a1ed | Paolo Bonzini | delta = hdelta; |
718 | 6ad0a1ed | Paolo Bonzini | } |
719 | db1a4972 | Paolo Bonzini | if (active_timers[QEMU_CLOCK_REALTIME]) {
|
720 | 9c13246a | Paolo Bonzini | rtdelta = (active_timers[QEMU_CLOCK_REALTIME]->expire_time * 1000000 -
|
721 | 9c13246a | Paolo Bonzini | qemu_get_clock_ns(rt_clock)); |
722 | db1a4972 | Paolo Bonzini | if (rtdelta < delta)
|
723 | db1a4972 | Paolo Bonzini | delta = rtdelta; |
724 | db1a4972 | Paolo Bonzini | } |
725 | db1a4972 | Paolo Bonzini | |
726 | db1a4972 | Paolo Bonzini | return delta;
|
727 | db1a4972 | Paolo Bonzini | } |
728 | db1a4972 | Paolo Bonzini | |
729 | 4c3d45eb | Paolo Bonzini | #if defined(__linux__)
|
730 | 4c3d45eb | Paolo Bonzini | |
731 | 4c3d45eb | Paolo Bonzini | #define RTC_FREQ 1024 |
732 | 4c3d45eb | Paolo Bonzini | |
733 | db1a4972 | Paolo Bonzini | static void enable_sigio_timer(int fd) |
734 | db1a4972 | Paolo Bonzini | { |
735 | db1a4972 | Paolo Bonzini | struct sigaction act;
|
736 | db1a4972 | Paolo Bonzini | |
737 | db1a4972 | Paolo Bonzini | /* timer signal */
|
738 | db1a4972 | Paolo Bonzini | sigfillset(&act.sa_mask); |
739 | db1a4972 | Paolo Bonzini | act.sa_flags = 0;
|
740 | db1a4972 | Paolo Bonzini | act.sa_handler = host_alarm_handler; |
741 | db1a4972 | Paolo Bonzini | |
742 | db1a4972 | Paolo Bonzini | sigaction(SIGIO, &act, NULL);
|
743 | db1a4972 | Paolo Bonzini | fcntl_setfl(fd, O_ASYNC); |
744 | db1a4972 | Paolo Bonzini | fcntl(fd, F_SETOWN, getpid()); |
745 | db1a4972 | Paolo Bonzini | } |
746 | db1a4972 | Paolo Bonzini | |
747 | db1a4972 | Paolo Bonzini | static int hpet_start_timer(struct qemu_alarm_timer *t) |
748 | db1a4972 | Paolo Bonzini | { |
749 | db1a4972 | Paolo Bonzini | struct hpet_info info;
|
750 | db1a4972 | Paolo Bonzini | int r, fd;
|
751 | db1a4972 | Paolo Bonzini | |
752 | db1a4972 | Paolo Bonzini | fd = qemu_open("/dev/hpet", O_RDONLY);
|
753 | db1a4972 | Paolo Bonzini | if (fd < 0) |
754 | db1a4972 | Paolo Bonzini | return -1; |
755 | db1a4972 | Paolo Bonzini | |
756 | db1a4972 | Paolo Bonzini | /* Set frequency */
|
757 | db1a4972 | Paolo Bonzini | r = ioctl(fd, HPET_IRQFREQ, RTC_FREQ); |
758 | db1a4972 | Paolo Bonzini | if (r < 0) { |
759 | db1a4972 | Paolo Bonzini | fprintf(stderr, "Could not configure '/dev/hpet' to have a 1024Hz timer. This is not a fatal\n"
|
760 | db1a4972 | Paolo Bonzini | "error, but for better emulation accuracy type:\n"
|
761 | db1a4972 | Paolo Bonzini | "'echo 1024 > /proc/sys/dev/hpet/max-user-freq' as root.\n");
|
762 | db1a4972 | Paolo Bonzini | goto fail;
|
763 | db1a4972 | Paolo Bonzini | } |
764 | db1a4972 | Paolo Bonzini | |
765 | db1a4972 | Paolo Bonzini | /* Check capabilities */
|
766 | db1a4972 | Paolo Bonzini | r = ioctl(fd, HPET_INFO, &info); |
767 | db1a4972 | Paolo Bonzini | if (r < 0) |
768 | db1a4972 | Paolo Bonzini | goto fail;
|
769 | db1a4972 | Paolo Bonzini | |
770 | db1a4972 | Paolo Bonzini | /* Enable periodic mode */
|
771 | db1a4972 | Paolo Bonzini | r = ioctl(fd, HPET_EPI, 0);
|
772 | db1a4972 | Paolo Bonzini | if (info.hi_flags && (r < 0)) |
773 | db1a4972 | Paolo Bonzini | goto fail;
|
774 | db1a4972 | Paolo Bonzini | |
775 | db1a4972 | Paolo Bonzini | /* Enable interrupt */
|
776 | db1a4972 | Paolo Bonzini | r = ioctl(fd, HPET_IE_ON, 0);
|
777 | db1a4972 | Paolo Bonzini | if (r < 0) |
778 | db1a4972 | Paolo Bonzini | goto fail;
|
779 | db1a4972 | Paolo Bonzini | |
780 | db1a4972 | Paolo Bonzini | enable_sigio_timer(fd); |
781 | db1a4972 | Paolo Bonzini | t->priv = (void *)(long)fd; |
782 | db1a4972 | Paolo Bonzini | |
783 | db1a4972 | Paolo Bonzini | return 0; |
784 | db1a4972 | Paolo Bonzini | fail:
|
785 | db1a4972 | Paolo Bonzini | close(fd); |
786 | db1a4972 | Paolo Bonzini | return -1; |
787 | db1a4972 | Paolo Bonzini | } |
788 | db1a4972 | Paolo Bonzini | |
789 | db1a4972 | Paolo Bonzini | static void hpet_stop_timer(struct qemu_alarm_timer *t) |
790 | db1a4972 | Paolo Bonzini | { |
791 | db1a4972 | Paolo Bonzini | int fd = (long)t->priv; |
792 | db1a4972 | Paolo Bonzini | |
793 | db1a4972 | Paolo Bonzini | close(fd); |
794 | db1a4972 | Paolo Bonzini | } |
795 | db1a4972 | Paolo Bonzini | |
796 | db1a4972 | Paolo Bonzini | static int rtc_start_timer(struct qemu_alarm_timer *t) |
797 | db1a4972 | Paolo Bonzini | { |
798 | db1a4972 | Paolo Bonzini | int rtc_fd;
|
799 | db1a4972 | Paolo Bonzini | unsigned long current_rtc_freq = 0; |
800 | db1a4972 | Paolo Bonzini | |
801 | db1a4972 | Paolo Bonzini | TFR(rtc_fd = qemu_open("/dev/rtc", O_RDONLY));
|
802 | db1a4972 | Paolo Bonzini | if (rtc_fd < 0) |
803 | db1a4972 | Paolo Bonzini | return -1; |
804 | db1a4972 | Paolo Bonzini | ioctl(rtc_fd, RTC_IRQP_READ, ¤t_rtc_freq); |
805 | db1a4972 | Paolo Bonzini | if (current_rtc_freq != RTC_FREQ &&
|
806 | db1a4972 | Paolo Bonzini | ioctl(rtc_fd, RTC_IRQP_SET, RTC_FREQ) < 0) {
|
807 | db1a4972 | Paolo Bonzini | fprintf(stderr, "Could not configure '/dev/rtc' to have a 1024 Hz timer. This is not a fatal\n"
|
808 | db1a4972 | Paolo Bonzini | "error, but for better emulation accuracy either use a 2.6 host Linux kernel or\n"
|
809 | db1a4972 | Paolo Bonzini | "type 'echo 1024 > /proc/sys/dev/rtc/max-user-freq' as root.\n");
|
810 | db1a4972 | Paolo Bonzini | goto fail;
|
811 | db1a4972 | Paolo Bonzini | } |
812 | db1a4972 | Paolo Bonzini | if (ioctl(rtc_fd, RTC_PIE_ON, 0) < 0) { |
813 | db1a4972 | Paolo Bonzini | fail:
|
814 | db1a4972 | Paolo Bonzini | close(rtc_fd); |
815 | db1a4972 | Paolo Bonzini | return -1; |
816 | db1a4972 | Paolo Bonzini | } |
817 | db1a4972 | Paolo Bonzini | |
818 | db1a4972 | Paolo Bonzini | enable_sigio_timer(rtc_fd); |
819 | db1a4972 | Paolo Bonzini | |
820 | db1a4972 | Paolo Bonzini | t->priv = (void *)(long)rtc_fd; |
821 | db1a4972 | Paolo Bonzini | |
822 | db1a4972 | Paolo Bonzini | return 0; |
823 | db1a4972 | Paolo Bonzini | } |
824 | db1a4972 | Paolo Bonzini | |
825 | db1a4972 | Paolo Bonzini | static void rtc_stop_timer(struct qemu_alarm_timer *t) |
826 | db1a4972 | Paolo Bonzini | { |
827 | db1a4972 | Paolo Bonzini | int rtc_fd = (long)t->priv; |
828 | db1a4972 | Paolo Bonzini | |
829 | db1a4972 | Paolo Bonzini | close(rtc_fd); |
830 | db1a4972 | Paolo Bonzini | } |
831 | db1a4972 | Paolo Bonzini | |
832 | db1a4972 | Paolo Bonzini | static int dynticks_start_timer(struct qemu_alarm_timer *t) |
833 | db1a4972 | Paolo Bonzini | { |
834 | db1a4972 | Paolo Bonzini | struct sigevent ev;
|
835 | db1a4972 | Paolo Bonzini | timer_t host_timer; |
836 | db1a4972 | Paolo Bonzini | struct sigaction act;
|
837 | db1a4972 | Paolo Bonzini | |
838 | db1a4972 | Paolo Bonzini | sigfillset(&act.sa_mask); |
839 | db1a4972 | Paolo Bonzini | act.sa_flags = 0;
|
840 | db1a4972 | Paolo Bonzini | act.sa_handler = host_alarm_handler; |
841 | db1a4972 | Paolo Bonzini | |
842 | db1a4972 | Paolo Bonzini | sigaction(SIGALRM, &act, NULL);
|
843 | db1a4972 | Paolo Bonzini | |
844 | db1a4972 | Paolo Bonzini | /*
|
845 | db1a4972 | Paolo Bonzini | * Initialize ev struct to 0 to avoid valgrind complaining
|
846 | db1a4972 | Paolo Bonzini | * about uninitialized data in timer_create call
|
847 | db1a4972 | Paolo Bonzini | */
|
848 | db1a4972 | Paolo Bonzini | memset(&ev, 0, sizeof(ev)); |
849 | db1a4972 | Paolo Bonzini | ev.sigev_value.sival_int = 0;
|
850 | db1a4972 | Paolo Bonzini | ev.sigev_notify = SIGEV_SIGNAL; |
851 | db1a4972 | Paolo Bonzini | ev.sigev_signo = SIGALRM; |
852 | db1a4972 | Paolo Bonzini | |
853 | db1a4972 | Paolo Bonzini | if (timer_create(CLOCK_REALTIME, &ev, &host_timer)) {
|
854 | db1a4972 | Paolo Bonzini | perror("timer_create");
|
855 | db1a4972 | Paolo Bonzini | |
856 | db1a4972 | Paolo Bonzini | /* disable dynticks */
|
857 | db1a4972 | Paolo Bonzini | fprintf(stderr, "Dynamic Ticks disabled\n");
|
858 | db1a4972 | Paolo Bonzini | |
859 | db1a4972 | Paolo Bonzini | return -1; |
860 | db1a4972 | Paolo Bonzini | } |
861 | db1a4972 | Paolo Bonzini | |
862 | db1a4972 | Paolo Bonzini | t->priv = (void *)(long)host_timer; |
863 | db1a4972 | Paolo Bonzini | |
864 | db1a4972 | Paolo Bonzini | return 0; |
865 | db1a4972 | Paolo Bonzini | } |
866 | db1a4972 | Paolo Bonzini | |
867 | db1a4972 | Paolo Bonzini | static void dynticks_stop_timer(struct qemu_alarm_timer *t) |
868 | db1a4972 | Paolo Bonzini | { |
869 | db1a4972 | Paolo Bonzini | timer_t host_timer = (timer_t)(long)t->priv;
|
870 | db1a4972 | Paolo Bonzini | |
871 | db1a4972 | Paolo Bonzini | timer_delete(host_timer); |
872 | db1a4972 | Paolo Bonzini | } |
873 | db1a4972 | Paolo Bonzini | |
874 | db1a4972 | Paolo Bonzini | static void dynticks_rearm_timer(struct qemu_alarm_timer *t) |
875 | db1a4972 | Paolo Bonzini | { |
876 | db1a4972 | Paolo Bonzini | timer_t host_timer = (timer_t)(long)t->priv;
|
877 | db1a4972 | Paolo Bonzini | struct itimerspec timeout;
|
878 | 9c13246a | Paolo Bonzini | int64_t nearest_delta_ns = INT64_MAX; |
879 | 9c13246a | Paolo Bonzini | int64_t current_ns; |
880 | db1a4972 | Paolo Bonzini | |
881 | db1a4972 | Paolo Bonzini | assert(alarm_has_dynticks(t)); |
882 | db1a4972 | Paolo Bonzini | if (!active_timers[QEMU_CLOCK_REALTIME] &&
|
883 | db1a4972 | Paolo Bonzini | !active_timers[QEMU_CLOCK_VIRTUAL] && |
884 | db1a4972 | Paolo Bonzini | !active_timers[QEMU_CLOCK_HOST]) |
885 | db1a4972 | Paolo Bonzini | return;
|
886 | db1a4972 | Paolo Bonzini | |
887 | 4c3d45eb | Paolo Bonzini | nearest_delta_ns = qemu_next_alarm_deadline(); |
888 | 4c3d45eb | Paolo Bonzini | if (nearest_delta_ns < MIN_TIMER_REARM_NS)
|
889 | 4c3d45eb | Paolo Bonzini | nearest_delta_ns = MIN_TIMER_REARM_NS; |
890 | db1a4972 | Paolo Bonzini | |
891 | db1a4972 | Paolo Bonzini | /* check whether a timer is already running */
|
892 | db1a4972 | Paolo Bonzini | if (timer_gettime(host_timer, &timeout)) {
|
893 | db1a4972 | Paolo Bonzini | perror("gettime");
|
894 | db1a4972 | Paolo Bonzini | fprintf(stderr, "Internal timer error: aborting\n");
|
895 | db1a4972 | Paolo Bonzini | exit(1);
|
896 | db1a4972 | Paolo Bonzini | } |
897 | 9c13246a | Paolo Bonzini | current_ns = timeout.it_value.tv_sec * 1000000000LL + timeout.it_value.tv_nsec;
|
898 | 9c13246a | Paolo Bonzini | if (current_ns && current_ns <= nearest_delta_ns)
|
899 | db1a4972 | Paolo Bonzini | return;
|
900 | db1a4972 | Paolo Bonzini | |
901 | db1a4972 | Paolo Bonzini | timeout.it_interval.tv_sec = 0;
|
902 | db1a4972 | Paolo Bonzini | timeout.it_interval.tv_nsec = 0; /* 0 for one-shot timer */ |
903 | 9c13246a | Paolo Bonzini | timeout.it_value.tv_sec = nearest_delta_ns / 1000000000;
|
904 | 9c13246a | Paolo Bonzini | timeout.it_value.tv_nsec = nearest_delta_ns % 1000000000;
|
905 | db1a4972 | Paolo Bonzini | if (timer_settime(host_timer, 0 /* RELATIVE */, &timeout, NULL)) { |
906 | db1a4972 | Paolo Bonzini | perror("settime");
|
907 | db1a4972 | Paolo Bonzini | fprintf(stderr, "Internal timer error: aborting\n");
|
908 | db1a4972 | Paolo Bonzini | exit(1);
|
909 | db1a4972 | Paolo Bonzini | } |
910 | db1a4972 | Paolo Bonzini | } |
911 | db1a4972 | Paolo Bonzini | |
912 | db1a4972 | Paolo Bonzini | #endif /* defined(__linux__) */ |
913 | db1a4972 | Paolo Bonzini | |
914 | f26e5a54 | Stefan Weil | #if !defined(_WIN32)
|
915 | f26e5a54 | Stefan Weil | |
916 | db1a4972 | Paolo Bonzini | static int unix_start_timer(struct qemu_alarm_timer *t) |
917 | db1a4972 | Paolo Bonzini | { |
918 | db1a4972 | Paolo Bonzini | struct sigaction act;
|
919 | db1a4972 | Paolo Bonzini | struct itimerval itv;
|
920 | db1a4972 | Paolo Bonzini | int err;
|
921 | db1a4972 | Paolo Bonzini | |
922 | db1a4972 | Paolo Bonzini | /* timer signal */
|
923 | db1a4972 | Paolo Bonzini | sigfillset(&act.sa_mask); |
924 | db1a4972 | Paolo Bonzini | act.sa_flags = 0;
|
925 | db1a4972 | Paolo Bonzini | act.sa_handler = host_alarm_handler; |
926 | db1a4972 | Paolo Bonzini | |
927 | db1a4972 | Paolo Bonzini | sigaction(SIGALRM, &act, NULL);
|
928 | db1a4972 | Paolo Bonzini | |
929 | db1a4972 | Paolo Bonzini | itv.it_interval.tv_sec = 0;
|
930 | db1a4972 | Paolo Bonzini | /* for i386 kernel 2.6 to get 1 ms */
|
931 | db1a4972 | Paolo Bonzini | itv.it_interval.tv_usec = 999;
|
932 | db1a4972 | Paolo Bonzini | itv.it_value.tv_sec = 0;
|
933 | db1a4972 | Paolo Bonzini | itv.it_value.tv_usec = 10 * 1000; |
934 | db1a4972 | Paolo Bonzini | |
935 | db1a4972 | Paolo Bonzini | err = setitimer(ITIMER_REAL, &itv, NULL);
|
936 | db1a4972 | Paolo Bonzini | if (err)
|
937 | db1a4972 | Paolo Bonzini | return -1; |
938 | db1a4972 | Paolo Bonzini | |
939 | db1a4972 | Paolo Bonzini | return 0; |
940 | db1a4972 | Paolo Bonzini | } |
941 | db1a4972 | Paolo Bonzini | |
942 | db1a4972 | Paolo Bonzini | static void unix_stop_timer(struct qemu_alarm_timer *t) |
943 | db1a4972 | Paolo Bonzini | { |
944 | db1a4972 | Paolo Bonzini | struct itimerval itv;
|
945 | db1a4972 | Paolo Bonzini | |
946 | db1a4972 | Paolo Bonzini | memset(&itv, 0, sizeof(itv)); |
947 | db1a4972 | Paolo Bonzini | setitimer(ITIMER_REAL, &itv, NULL);
|
948 | db1a4972 | Paolo Bonzini | } |
949 | db1a4972 | Paolo Bonzini | |
950 | db1a4972 | Paolo Bonzini | #endif /* !defined(_WIN32) */ |
951 | db1a4972 | Paolo Bonzini | |
952 | db1a4972 | Paolo Bonzini | |
953 | db1a4972 | Paolo Bonzini | #ifdef _WIN32
|
954 | db1a4972 | Paolo Bonzini | |
955 | db1a4972 | Paolo Bonzini | static int win32_start_timer(struct qemu_alarm_timer *t) |
956 | db1a4972 | Paolo Bonzini | { |
957 | 68c23e55 | Paolo Bonzini | HANDLE hTimer; |
958 | 68c23e55 | Paolo Bonzini | BOOLEAN success; |
959 | 68c23e55 | Paolo Bonzini | |
960 | 68c23e55 | Paolo Bonzini | /* If you call ChangeTimerQueueTimer on a one-shot timer (its period
|
961 | 68c23e55 | Paolo Bonzini | is zero) that has already expired, the timer is not updated. Since
|
962 | 68c23e55 | Paolo Bonzini | creating a new timer is relatively expensive, set a bogus one-hour
|
963 | 68c23e55 | Paolo Bonzini | interval in the dynticks case. */
|
964 | 68c23e55 | Paolo Bonzini | success = CreateTimerQueueTimer(&hTimer, |
965 | 68c23e55 | Paolo Bonzini | NULL,
|
966 | 68c23e55 | Paolo Bonzini | host_alarm_handler, |
967 | 68c23e55 | Paolo Bonzini | t, |
968 | 68c23e55 | Paolo Bonzini | 1,
|
969 | 68c23e55 | Paolo Bonzini | alarm_has_dynticks(t) ? 3600000 : 1, |
970 | 68c23e55 | Paolo Bonzini | WT_EXECUTEINTIMERTHREAD); |
971 | 68c23e55 | Paolo Bonzini | |
972 | 68c23e55 | Paolo Bonzini | if (!success) {
|
973 | db1a4972 | Paolo Bonzini | fprintf(stderr, "Failed to initialize win32 alarm timer: %ld\n",
|
974 | db1a4972 | Paolo Bonzini | GetLastError()); |
975 | db1a4972 | Paolo Bonzini | return -1; |
976 | db1a4972 | Paolo Bonzini | } |
977 | db1a4972 | Paolo Bonzini | |
978 | 68c23e55 | Paolo Bonzini | t->priv = (PVOID) hTimer; |
979 | db1a4972 | Paolo Bonzini | return 0; |
980 | db1a4972 | Paolo Bonzini | } |
981 | db1a4972 | Paolo Bonzini | |
982 | db1a4972 | Paolo Bonzini | static void win32_stop_timer(struct qemu_alarm_timer *t) |
983 | db1a4972 | Paolo Bonzini | { |
984 | 68c23e55 | Paolo Bonzini | HANDLE hTimer = t->priv; |
985 | db1a4972 | Paolo Bonzini | |
986 | 68c23e55 | Paolo Bonzini | if (hTimer) {
|
987 | 68c23e55 | Paolo Bonzini | DeleteTimerQueueTimer(NULL, hTimer, NULL); |
988 | 68c23e55 | Paolo Bonzini | } |
989 | db1a4972 | Paolo Bonzini | } |
990 | db1a4972 | Paolo Bonzini | |
991 | db1a4972 | Paolo Bonzini | static void win32_rearm_timer(struct qemu_alarm_timer *t) |
992 | db1a4972 | Paolo Bonzini | { |
993 | 68c23e55 | Paolo Bonzini | HANDLE hTimer = t->priv; |
994 | cfced5b2 | Paolo Bonzini | int nearest_delta_ms;
|
995 | 68c23e55 | Paolo Bonzini | BOOLEAN success; |
996 | db1a4972 | Paolo Bonzini | |
997 | db1a4972 | Paolo Bonzini | assert(alarm_has_dynticks(t)); |
998 | db1a4972 | Paolo Bonzini | if (!active_timers[QEMU_CLOCK_REALTIME] &&
|
999 | db1a4972 | Paolo Bonzini | !active_timers[QEMU_CLOCK_VIRTUAL] && |
1000 | db1a4972 | Paolo Bonzini | !active_timers[QEMU_CLOCK_HOST]) |
1001 | db1a4972 | Paolo Bonzini | return;
|
1002 | db1a4972 | Paolo Bonzini | |
1003 | cfced5b2 | Paolo Bonzini | nearest_delta_ms = (qemu_next_alarm_deadline() + 999999) / 1000000; |
1004 | cfced5b2 | Paolo Bonzini | if (nearest_delta_ms < 1) { |
1005 | cfced5b2 | Paolo Bonzini | nearest_delta_ms = 1;
|
1006 | cfced5b2 | Paolo Bonzini | } |
1007 | 68c23e55 | Paolo Bonzini | success = ChangeTimerQueueTimer(NULL,
|
1008 | 68c23e55 | Paolo Bonzini | hTimer, |
1009 | 68c23e55 | Paolo Bonzini | nearest_delta_ms, |
1010 | 68c23e55 | Paolo Bonzini | 3600000);
|
1011 | db1a4972 | Paolo Bonzini | |
1012 | 68c23e55 | Paolo Bonzini | if (!success) {
|
1013 | 68c23e55 | Paolo Bonzini | fprintf(stderr, "Failed to rearm win32 alarm timer: %ld\n",
|
1014 | 68c23e55 | Paolo Bonzini | GetLastError()); |
1015 | 68c23e55 | Paolo Bonzini | exit(-1);
|
1016 | db1a4972 | Paolo Bonzini | } |
1017 | 68c23e55 | Paolo Bonzini | |
1018 | db1a4972 | Paolo Bonzini | } |
1019 | db1a4972 | Paolo Bonzini | |
1020 | db1a4972 | Paolo Bonzini | #endif /* _WIN32 */ |
1021 | db1a4972 | Paolo Bonzini | |
1022 | db1a4972 | Paolo Bonzini | static void alarm_timer_on_change_state_rearm(void *opaque, int running, int reason) |
1023 | db1a4972 | Paolo Bonzini | { |
1024 | db1a4972 | Paolo Bonzini | if (running)
|
1025 | db1a4972 | Paolo Bonzini | qemu_rearm_alarm_timer((struct qemu_alarm_timer *) opaque);
|
1026 | db1a4972 | Paolo Bonzini | } |
1027 | db1a4972 | Paolo Bonzini | |
1028 | db1a4972 | Paolo Bonzini | int init_timer_alarm(void) |
1029 | db1a4972 | Paolo Bonzini | { |
1030 | db1a4972 | Paolo Bonzini | struct qemu_alarm_timer *t = NULL; |
1031 | db1a4972 | Paolo Bonzini | int i, err = -1; |
1032 | db1a4972 | Paolo Bonzini | |
1033 | db1a4972 | Paolo Bonzini | for (i = 0; alarm_timers[i].name; i++) { |
1034 | db1a4972 | Paolo Bonzini | t = &alarm_timers[i]; |
1035 | db1a4972 | Paolo Bonzini | |
1036 | db1a4972 | Paolo Bonzini | err = t->start(t); |
1037 | db1a4972 | Paolo Bonzini | if (!err)
|
1038 | db1a4972 | Paolo Bonzini | break;
|
1039 | db1a4972 | Paolo Bonzini | } |
1040 | db1a4972 | Paolo Bonzini | |
1041 | db1a4972 | Paolo Bonzini | if (err) {
|
1042 | db1a4972 | Paolo Bonzini | err = -ENOENT; |
1043 | db1a4972 | Paolo Bonzini | goto fail;
|
1044 | db1a4972 | Paolo Bonzini | } |
1045 | db1a4972 | Paolo Bonzini | |
1046 | db1a4972 | Paolo Bonzini | /* first event is at time 0 */
|
1047 | db1a4972 | Paolo Bonzini | t->pending = 1;
|
1048 | db1a4972 | Paolo Bonzini | alarm_timer = t; |
1049 | db1a4972 | Paolo Bonzini | qemu_add_vm_change_state_handler(alarm_timer_on_change_state_rearm, t); |
1050 | db1a4972 | Paolo Bonzini | |
1051 | db1a4972 | Paolo Bonzini | return 0; |
1052 | db1a4972 | Paolo Bonzini | |
1053 | db1a4972 | Paolo Bonzini | fail:
|
1054 | db1a4972 | Paolo Bonzini | return err;
|
1055 | db1a4972 | Paolo Bonzini | } |
1056 | db1a4972 | Paolo Bonzini | |
1057 | db1a4972 | Paolo Bonzini | void quit_timers(void) |
1058 | db1a4972 | Paolo Bonzini | { |
1059 | db1a4972 | Paolo Bonzini | struct qemu_alarm_timer *t = alarm_timer;
|
1060 | db1a4972 | Paolo Bonzini | alarm_timer = NULL;
|
1061 | db1a4972 | Paolo Bonzini | t->stop(t); |
1062 | db1a4972 | Paolo Bonzini | } |
1063 | db1a4972 | Paolo Bonzini | |
1064 | db1a4972 | Paolo Bonzini | int qemu_calculate_timeout(void) |
1065 | db1a4972 | Paolo Bonzini | { |
1066 | db1a4972 | Paolo Bonzini | int timeout;
|
1067 | c9f7383c | Paolo Bonzini | int64_t add; |
1068 | c9f7383c | Paolo Bonzini | int64_t delta; |
1069 | db1a4972 | Paolo Bonzini | |
1070 | 225d02cd | Edgar E. Iglesias | /* When using icount, making forward progress with qemu_icount when the
|
1071 | 225d02cd | Edgar E. Iglesias | guest CPU is idle is critical. We only use the static io-thread timeout
|
1072 | 225d02cd | Edgar E. Iglesias | for non icount runs. */
|
1073 | c9f7383c | Paolo Bonzini | if (!use_icount || !vm_running) {
|
1074 | c9f7383c | Paolo Bonzini | return 5000; |
1075 | 225d02cd | Edgar E. Iglesias | } |
1076 | 225d02cd | Edgar E. Iglesias | |
1077 | c9f7383c | Paolo Bonzini | /* Advance virtual time to the next event. */
|
1078 | c9f7383c | Paolo Bonzini | delta = qemu_icount_delta(); |
1079 | c9f7383c | Paolo Bonzini | if (delta > 0) { |
1080 | c9f7383c | Paolo Bonzini | /* If virtual time is ahead of real time then just
|
1081 | c9f7383c | Paolo Bonzini | wait for IO. */
|
1082 | c9f7383c | Paolo Bonzini | timeout = (delta + 999999) / 1000000; |
1083 | c9f7383c | Paolo Bonzini | } else {
|
1084 | c9f7383c | Paolo Bonzini | /* Wait for either IO to occur or the next
|
1085 | c9f7383c | Paolo Bonzini | timer event. */
|
1086 | c9f7383c | Paolo Bonzini | add = qemu_next_deadline(); |
1087 | c9f7383c | Paolo Bonzini | /* We advance the timer before checking for IO.
|
1088 | c9f7383c | Paolo Bonzini | Limit the amount we advance so that early IO
|
1089 | c9f7383c | Paolo Bonzini | activity won't get the guest too far ahead. */
|
1090 | c9f7383c | Paolo Bonzini | if (add > 10000000) |
1091 | c9f7383c | Paolo Bonzini | add = 10000000;
|
1092 | c9f7383c | Paolo Bonzini | delta += add; |
1093 | c9f7383c | Paolo Bonzini | qemu_icount += qemu_icount_round (add); |
1094 | c9f7383c | Paolo Bonzini | timeout = delta / 1000000;
|
1095 | c9f7383c | Paolo Bonzini | if (timeout < 0) |
1096 | c9f7383c | Paolo Bonzini | timeout = 0;
|
1097 | db1a4972 | Paolo Bonzini | } |
1098 | db1a4972 | Paolo Bonzini | |
1099 | db1a4972 | Paolo Bonzini | return timeout;
|
1100 | db1a4972 | Paolo Bonzini | } |