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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 | |
68 | db1a4972 | Paolo Bonzini | /***********************************************************/
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69 | db1a4972 | Paolo Bonzini | /* real time host monotonic timer */
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70 | db1a4972 | Paolo Bonzini | |
71 | db1a4972 | Paolo Bonzini | |
72 | db1a4972 | Paolo Bonzini | static int64_t get_clock_realtime(void) |
73 | db1a4972 | Paolo Bonzini | { |
74 | db1a4972 | Paolo Bonzini | struct timeval tv;
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75 | db1a4972 | Paolo Bonzini | |
76 | db1a4972 | Paolo Bonzini | gettimeofday(&tv, NULL);
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77 | db1a4972 | Paolo Bonzini | return tv.tv_sec * 1000000000LL + (tv.tv_usec * 1000); |
78 | db1a4972 | Paolo Bonzini | } |
79 | db1a4972 | Paolo Bonzini | |
80 | db1a4972 | Paolo Bonzini | #ifdef WIN32
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81 | db1a4972 | Paolo Bonzini | |
82 | db1a4972 | Paolo Bonzini | static int64_t clock_freq;
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83 | db1a4972 | Paolo Bonzini | |
84 | db1a4972 | Paolo Bonzini | static void init_get_clock(void) |
85 | db1a4972 | Paolo Bonzini | { |
86 | db1a4972 | Paolo Bonzini | LARGE_INTEGER freq; |
87 | db1a4972 | Paolo Bonzini | int ret;
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88 | db1a4972 | Paolo Bonzini | ret = QueryPerformanceFrequency(&freq); |
89 | db1a4972 | Paolo Bonzini | if (ret == 0) { |
90 | db1a4972 | Paolo Bonzini | fprintf(stderr, "Could not calibrate ticks\n");
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91 | db1a4972 | Paolo Bonzini | exit(1);
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92 | db1a4972 | Paolo Bonzini | } |
93 | db1a4972 | Paolo Bonzini | clock_freq = freq.QuadPart; |
94 | db1a4972 | Paolo Bonzini | } |
95 | db1a4972 | Paolo Bonzini | |
96 | db1a4972 | Paolo Bonzini | static int64_t get_clock(void) |
97 | db1a4972 | Paolo Bonzini | { |
98 | db1a4972 | Paolo Bonzini | LARGE_INTEGER ti; |
99 | db1a4972 | Paolo Bonzini | QueryPerformanceCounter(&ti); |
100 | db1a4972 | Paolo Bonzini | return muldiv64(ti.QuadPart, get_ticks_per_sec(), clock_freq);
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101 | db1a4972 | Paolo Bonzini | } |
102 | db1a4972 | Paolo Bonzini | |
103 | db1a4972 | Paolo Bonzini | #else
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104 | db1a4972 | Paolo Bonzini | |
105 | db1a4972 | Paolo Bonzini | static int use_rt_clock; |
106 | db1a4972 | Paolo Bonzini | |
107 | db1a4972 | Paolo Bonzini | static void init_get_clock(void) |
108 | db1a4972 | Paolo Bonzini | { |
109 | db1a4972 | Paolo Bonzini | use_rt_clock = 0;
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110 | db1a4972 | Paolo Bonzini | #if defined(__linux__) || (defined(__FreeBSD__) && __FreeBSD_version >= 500000) \ |
111 | db1a4972 | Paolo Bonzini | || defined(__DragonFly__) || defined(__FreeBSD_kernel__) |
112 | db1a4972 | Paolo Bonzini | { |
113 | db1a4972 | Paolo Bonzini | struct timespec ts;
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114 | db1a4972 | Paolo Bonzini | if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0) { |
115 | db1a4972 | Paolo Bonzini | use_rt_clock = 1;
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116 | db1a4972 | Paolo Bonzini | } |
117 | db1a4972 | Paolo Bonzini | } |
118 | db1a4972 | Paolo Bonzini | #endif
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119 | db1a4972 | Paolo Bonzini | } |
120 | db1a4972 | Paolo Bonzini | |
121 | db1a4972 | Paolo Bonzini | static int64_t get_clock(void) |
122 | db1a4972 | Paolo Bonzini | { |
123 | db1a4972 | Paolo Bonzini | #if defined(__linux__) || (defined(__FreeBSD__) && __FreeBSD_version >= 500000) \ |
124 | db1a4972 | Paolo Bonzini | || defined(__DragonFly__) || defined(__FreeBSD_kernel__) |
125 | db1a4972 | Paolo Bonzini | if (use_rt_clock) {
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126 | db1a4972 | Paolo Bonzini | struct timespec ts;
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127 | db1a4972 | Paolo Bonzini | clock_gettime(CLOCK_MONOTONIC, &ts); |
128 | db1a4972 | Paolo Bonzini | return ts.tv_sec * 1000000000LL + ts.tv_nsec; |
129 | db1a4972 | Paolo Bonzini | } else
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130 | db1a4972 | Paolo Bonzini | #endif
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131 | db1a4972 | Paolo Bonzini | { |
132 | db1a4972 | Paolo Bonzini | /* XXX: using gettimeofday leads to problems if the date
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133 | db1a4972 | Paolo Bonzini | changes, so it should be avoided. */
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134 | db1a4972 | Paolo Bonzini | return get_clock_realtime();
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135 | db1a4972 | Paolo Bonzini | } |
136 | db1a4972 | Paolo Bonzini | } |
137 | db1a4972 | Paolo Bonzini | #endif
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138 | db1a4972 | Paolo Bonzini | |
139 | db1a4972 | Paolo Bonzini | /***********************************************************/
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140 | db1a4972 | Paolo Bonzini | /* guest cycle counter */
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141 | db1a4972 | Paolo Bonzini | |
142 | db1a4972 | Paolo Bonzini | typedef struct TimersState { |
143 | db1a4972 | Paolo Bonzini | int64_t cpu_ticks_prev; |
144 | db1a4972 | Paolo Bonzini | int64_t cpu_ticks_offset; |
145 | db1a4972 | Paolo Bonzini | int64_t cpu_clock_offset; |
146 | db1a4972 | Paolo Bonzini | int32_t cpu_ticks_enabled; |
147 | db1a4972 | Paolo Bonzini | int64_t dummy; |
148 | db1a4972 | Paolo Bonzini | } TimersState; |
149 | db1a4972 | Paolo Bonzini | |
150 | db1a4972 | Paolo Bonzini | TimersState timers_state; |
151 | db1a4972 | Paolo Bonzini | |
152 | db1a4972 | Paolo Bonzini | /* return the host CPU cycle counter and handle stop/restart */
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153 | db1a4972 | Paolo Bonzini | int64_t cpu_get_ticks(void)
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154 | db1a4972 | Paolo Bonzini | { |
155 | db1a4972 | Paolo Bonzini | if (use_icount) {
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156 | db1a4972 | Paolo Bonzini | return cpu_get_icount();
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157 | db1a4972 | Paolo Bonzini | } |
158 | db1a4972 | Paolo Bonzini | if (!timers_state.cpu_ticks_enabled) {
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159 | db1a4972 | Paolo Bonzini | return timers_state.cpu_ticks_offset;
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160 | db1a4972 | Paolo Bonzini | } else {
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161 | db1a4972 | Paolo Bonzini | int64_t ticks; |
162 | db1a4972 | Paolo Bonzini | ticks = cpu_get_real_ticks(); |
163 | db1a4972 | Paolo Bonzini | if (timers_state.cpu_ticks_prev > ticks) {
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164 | db1a4972 | Paolo Bonzini | /* Note: non increasing ticks may happen if the host uses
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165 | db1a4972 | Paolo Bonzini | software suspend */
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166 | db1a4972 | Paolo Bonzini | timers_state.cpu_ticks_offset += timers_state.cpu_ticks_prev - ticks; |
167 | db1a4972 | Paolo Bonzini | } |
168 | db1a4972 | Paolo Bonzini | timers_state.cpu_ticks_prev = ticks; |
169 | db1a4972 | Paolo Bonzini | return ticks + timers_state.cpu_ticks_offset;
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170 | db1a4972 | Paolo Bonzini | } |
171 | db1a4972 | Paolo Bonzini | } |
172 | db1a4972 | Paolo Bonzini | |
173 | db1a4972 | Paolo Bonzini | /* return the host CPU monotonic timer and handle stop/restart */
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174 | db1a4972 | Paolo Bonzini | static int64_t cpu_get_clock(void) |
175 | db1a4972 | Paolo Bonzini | { |
176 | db1a4972 | Paolo Bonzini | int64_t ti; |
177 | db1a4972 | Paolo Bonzini | if (!timers_state.cpu_ticks_enabled) {
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178 | db1a4972 | Paolo Bonzini | return timers_state.cpu_clock_offset;
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179 | db1a4972 | Paolo Bonzini | } else {
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180 | db1a4972 | Paolo Bonzini | ti = get_clock(); |
181 | db1a4972 | Paolo Bonzini | return ti + timers_state.cpu_clock_offset;
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182 | db1a4972 | Paolo Bonzini | } |
183 | db1a4972 | Paolo Bonzini | } |
184 | db1a4972 | Paolo Bonzini | |
185 | db1a4972 | Paolo Bonzini | #ifndef CONFIG_IOTHREAD
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186 | db1a4972 | Paolo Bonzini | static int64_t qemu_icount_delta(void) |
187 | db1a4972 | Paolo Bonzini | { |
188 | db1a4972 | Paolo Bonzini | if (!use_icount) {
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189 | db1a4972 | Paolo Bonzini | return 5000 * (int64_t) 1000000; |
190 | db1a4972 | Paolo Bonzini | } else if (use_icount == 1) { |
191 | db1a4972 | Paolo Bonzini | /* When not using an adaptive execution frequency
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192 | db1a4972 | Paolo Bonzini | we tend to get badly out of sync with real time,
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193 | db1a4972 | Paolo Bonzini | so just delay for a reasonable amount of time. */
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194 | db1a4972 | Paolo Bonzini | return 0; |
195 | db1a4972 | Paolo Bonzini | } else {
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196 | db1a4972 | Paolo Bonzini | return cpu_get_icount() - cpu_get_clock();
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197 | db1a4972 | Paolo Bonzini | } |
198 | db1a4972 | Paolo Bonzini | } |
199 | db1a4972 | Paolo Bonzini | #endif
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200 | db1a4972 | Paolo Bonzini | |
201 | db1a4972 | Paolo Bonzini | /* enable cpu_get_ticks() */
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202 | db1a4972 | Paolo Bonzini | void cpu_enable_ticks(void) |
203 | db1a4972 | Paolo Bonzini | { |
204 | db1a4972 | Paolo Bonzini | if (!timers_state.cpu_ticks_enabled) {
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205 | db1a4972 | Paolo Bonzini | timers_state.cpu_ticks_offset -= cpu_get_real_ticks(); |
206 | db1a4972 | Paolo Bonzini | timers_state.cpu_clock_offset -= get_clock(); |
207 | db1a4972 | Paolo Bonzini | timers_state.cpu_ticks_enabled = 1;
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208 | db1a4972 | Paolo Bonzini | } |
209 | db1a4972 | Paolo Bonzini | } |
210 | db1a4972 | Paolo Bonzini | |
211 | db1a4972 | Paolo Bonzini | /* disable cpu_get_ticks() : the clock is stopped. You must not call
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212 | db1a4972 | Paolo Bonzini | cpu_get_ticks() after that. */
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213 | db1a4972 | Paolo Bonzini | void cpu_disable_ticks(void) |
214 | db1a4972 | Paolo Bonzini | { |
215 | db1a4972 | Paolo Bonzini | if (timers_state.cpu_ticks_enabled) {
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216 | db1a4972 | Paolo Bonzini | timers_state.cpu_ticks_offset = cpu_get_ticks(); |
217 | db1a4972 | Paolo Bonzini | timers_state.cpu_clock_offset = cpu_get_clock(); |
218 | db1a4972 | Paolo Bonzini | timers_state.cpu_ticks_enabled = 0;
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219 | db1a4972 | Paolo Bonzini | } |
220 | db1a4972 | Paolo Bonzini | } |
221 | db1a4972 | Paolo Bonzini | |
222 | db1a4972 | Paolo Bonzini | /***********************************************************/
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223 | db1a4972 | Paolo Bonzini | /* timers */
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224 | db1a4972 | Paolo Bonzini | |
225 | db1a4972 | Paolo Bonzini | #define QEMU_CLOCK_REALTIME 0 |
226 | db1a4972 | Paolo Bonzini | #define QEMU_CLOCK_VIRTUAL 1 |
227 | db1a4972 | Paolo Bonzini | #define QEMU_CLOCK_HOST 2 |
228 | db1a4972 | Paolo Bonzini | |
229 | db1a4972 | Paolo Bonzini | struct QEMUClock {
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230 | db1a4972 | Paolo Bonzini | int type;
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231 | db1a4972 | Paolo Bonzini | int enabled;
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232 | db1a4972 | Paolo Bonzini | /* XXX: add frequency */
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233 | db1a4972 | Paolo Bonzini | }; |
234 | db1a4972 | Paolo Bonzini | |
235 | db1a4972 | Paolo Bonzini | struct QEMUTimer {
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236 | db1a4972 | Paolo Bonzini | QEMUClock *clock; |
237 | db1a4972 | Paolo Bonzini | int64_t expire_time; |
238 | db1a4972 | Paolo Bonzini | QEMUTimerCB *cb; |
239 | db1a4972 | Paolo Bonzini | void *opaque;
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240 | db1a4972 | Paolo Bonzini | struct QEMUTimer *next;
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241 | db1a4972 | Paolo Bonzini | }; |
242 | db1a4972 | Paolo Bonzini | |
243 | db1a4972 | Paolo Bonzini | struct qemu_alarm_timer {
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244 | db1a4972 | Paolo Bonzini | char const *name; |
245 | db1a4972 | Paolo Bonzini | int (*start)(struct qemu_alarm_timer *t); |
246 | db1a4972 | Paolo Bonzini | void (*stop)(struct qemu_alarm_timer *t); |
247 | db1a4972 | Paolo Bonzini | void (*rearm)(struct qemu_alarm_timer *t); |
248 | db1a4972 | Paolo Bonzini | void *priv;
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249 | db1a4972 | Paolo Bonzini | |
250 | db1a4972 | Paolo Bonzini | char expired;
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251 | db1a4972 | Paolo Bonzini | char pending;
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252 | db1a4972 | Paolo Bonzini | }; |
253 | db1a4972 | Paolo Bonzini | |
254 | db1a4972 | Paolo Bonzini | static struct qemu_alarm_timer *alarm_timer; |
255 | db1a4972 | Paolo Bonzini | |
256 | db1a4972 | Paolo Bonzini | int qemu_alarm_pending(void) |
257 | db1a4972 | Paolo Bonzini | { |
258 | db1a4972 | Paolo Bonzini | return alarm_timer->pending;
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259 | db1a4972 | Paolo Bonzini | } |
260 | db1a4972 | Paolo Bonzini | |
261 | db1a4972 | Paolo Bonzini | static inline int alarm_has_dynticks(struct qemu_alarm_timer *t) |
262 | db1a4972 | Paolo Bonzini | { |
263 | db1a4972 | Paolo Bonzini | return !!t->rearm;
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264 | db1a4972 | Paolo Bonzini | } |
265 | db1a4972 | Paolo Bonzini | |
266 | db1a4972 | Paolo Bonzini | static void qemu_rearm_alarm_timer(struct qemu_alarm_timer *t) |
267 | db1a4972 | Paolo Bonzini | { |
268 | db1a4972 | Paolo Bonzini | if (!alarm_has_dynticks(t))
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269 | db1a4972 | Paolo Bonzini | return;
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270 | db1a4972 | Paolo Bonzini | |
271 | db1a4972 | Paolo Bonzini | t->rearm(t); |
272 | db1a4972 | Paolo Bonzini | } |
273 | db1a4972 | Paolo Bonzini | |
274 | db1a4972 | Paolo Bonzini | /* TODO: MIN_TIMER_REARM_US should be optimized */
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275 | db1a4972 | Paolo Bonzini | #define MIN_TIMER_REARM_US 250 |
276 | db1a4972 | Paolo Bonzini | |
277 | db1a4972 | Paolo Bonzini | #ifdef _WIN32
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278 | db1a4972 | Paolo Bonzini | |
279 | db1a4972 | Paolo Bonzini | struct qemu_alarm_win32 {
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280 | db1a4972 | Paolo Bonzini | MMRESULT timerId; |
281 | db1a4972 | Paolo Bonzini | unsigned int period; |
282 | db1a4972 | Paolo Bonzini | } alarm_win32_data = {0, 0}; |
283 | db1a4972 | Paolo Bonzini | |
284 | db1a4972 | Paolo Bonzini | static int win32_start_timer(struct qemu_alarm_timer *t); |
285 | db1a4972 | Paolo Bonzini | static void win32_stop_timer(struct qemu_alarm_timer *t); |
286 | db1a4972 | Paolo Bonzini | static void win32_rearm_timer(struct qemu_alarm_timer *t); |
287 | db1a4972 | Paolo Bonzini | |
288 | db1a4972 | Paolo Bonzini | #else
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289 | db1a4972 | Paolo Bonzini | |
290 | db1a4972 | Paolo Bonzini | static int unix_start_timer(struct qemu_alarm_timer *t); |
291 | db1a4972 | Paolo Bonzini | static void unix_stop_timer(struct qemu_alarm_timer *t); |
292 | db1a4972 | Paolo Bonzini | |
293 | db1a4972 | Paolo Bonzini | #ifdef __linux__
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294 | db1a4972 | Paolo Bonzini | |
295 | db1a4972 | Paolo Bonzini | static int dynticks_start_timer(struct qemu_alarm_timer *t); |
296 | db1a4972 | Paolo Bonzini | static void dynticks_stop_timer(struct qemu_alarm_timer *t); |
297 | db1a4972 | Paolo Bonzini | static void dynticks_rearm_timer(struct qemu_alarm_timer *t); |
298 | db1a4972 | Paolo Bonzini | |
299 | db1a4972 | Paolo Bonzini | static int hpet_start_timer(struct qemu_alarm_timer *t); |
300 | db1a4972 | Paolo Bonzini | static void hpet_stop_timer(struct qemu_alarm_timer *t); |
301 | db1a4972 | Paolo Bonzini | |
302 | db1a4972 | Paolo Bonzini | static int rtc_start_timer(struct qemu_alarm_timer *t); |
303 | db1a4972 | Paolo Bonzini | static void rtc_stop_timer(struct qemu_alarm_timer *t); |
304 | db1a4972 | Paolo Bonzini | |
305 | db1a4972 | Paolo Bonzini | #endif /* __linux__ */ |
306 | db1a4972 | Paolo Bonzini | |
307 | db1a4972 | Paolo Bonzini | #endif /* _WIN32 */ |
308 | db1a4972 | Paolo Bonzini | |
309 | db1a4972 | Paolo Bonzini | /* Correlation between real and virtual time is always going to be
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310 | db1a4972 | Paolo Bonzini | fairly approximate, so ignore small variation.
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311 | db1a4972 | Paolo Bonzini | When the guest is idle real and virtual time will be aligned in
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312 | db1a4972 | Paolo Bonzini | the IO wait loop. */
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313 | db1a4972 | Paolo Bonzini | #define ICOUNT_WOBBLE (get_ticks_per_sec() / 10) |
314 | db1a4972 | Paolo Bonzini | |
315 | db1a4972 | Paolo Bonzini | static void icount_adjust(void) |
316 | db1a4972 | Paolo Bonzini | { |
317 | db1a4972 | Paolo Bonzini | int64_t cur_time; |
318 | db1a4972 | Paolo Bonzini | int64_t cur_icount; |
319 | db1a4972 | Paolo Bonzini | int64_t delta; |
320 | db1a4972 | Paolo Bonzini | static int64_t last_delta;
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321 | db1a4972 | Paolo Bonzini | /* If the VM is not running, then do nothing. */
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322 | db1a4972 | Paolo Bonzini | if (!vm_running)
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323 | db1a4972 | Paolo Bonzini | return;
|
324 | db1a4972 | Paolo Bonzini | |
325 | db1a4972 | Paolo Bonzini | cur_time = cpu_get_clock(); |
326 | db1a4972 | Paolo Bonzini | cur_icount = qemu_get_clock(vm_clock); |
327 | db1a4972 | Paolo Bonzini | delta = cur_icount - cur_time; |
328 | db1a4972 | Paolo Bonzini | /* FIXME: This is a very crude algorithm, somewhat prone to oscillation. */
|
329 | db1a4972 | Paolo Bonzini | if (delta > 0 |
330 | db1a4972 | Paolo Bonzini | && last_delta + ICOUNT_WOBBLE < delta * 2
|
331 | db1a4972 | Paolo Bonzini | && icount_time_shift > 0) {
|
332 | db1a4972 | Paolo Bonzini | /* The guest is getting too far ahead. Slow time down. */
|
333 | db1a4972 | Paolo Bonzini | icount_time_shift--; |
334 | db1a4972 | Paolo Bonzini | } |
335 | db1a4972 | Paolo Bonzini | if (delta < 0 |
336 | db1a4972 | Paolo Bonzini | && last_delta - ICOUNT_WOBBLE > delta * 2
|
337 | db1a4972 | Paolo Bonzini | && icount_time_shift < MAX_ICOUNT_SHIFT) { |
338 | db1a4972 | Paolo Bonzini | /* The guest is getting too far behind. Speed time up. */
|
339 | db1a4972 | Paolo Bonzini | icount_time_shift++; |
340 | db1a4972 | Paolo Bonzini | } |
341 | db1a4972 | Paolo Bonzini | last_delta = delta; |
342 | db1a4972 | Paolo Bonzini | qemu_icount_bias = cur_icount - (qemu_icount << icount_time_shift); |
343 | db1a4972 | Paolo Bonzini | } |
344 | db1a4972 | Paolo Bonzini | |
345 | db1a4972 | Paolo Bonzini | static void icount_adjust_rt(void * opaque) |
346 | db1a4972 | Paolo Bonzini | { |
347 | db1a4972 | Paolo Bonzini | qemu_mod_timer(icount_rt_timer, |
348 | db1a4972 | Paolo Bonzini | qemu_get_clock(rt_clock) + 1000);
|
349 | db1a4972 | Paolo Bonzini | icount_adjust(); |
350 | db1a4972 | Paolo Bonzini | } |
351 | db1a4972 | Paolo Bonzini | |
352 | db1a4972 | Paolo Bonzini | static void icount_adjust_vm(void * opaque) |
353 | db1a4972 | Paolo Bonzini | { |
354 | db1a4972 | Paolo Bonzini | qemu_mod_timer(icount_vm_timer, |
355 | db1a4972 | Paolo Bonzini | qemu_get_clock(vm_clock) + get_ticks_per_sec() / 10);
|
356 | db1a4972 | Paolo Bonzini | icount_adjust(); |
357 | db1a4972 | Paolo Bonzini | } |
358 | db1a4972 | Paolo Bonzini | |
359 | db1a4972 | Paolo Bonzini | int64_t qemu_icount_round(int64_t count) |
360 | db1a4972 | Paolo Bonzini | { |
361 | db1a4972 | Paolo Bonzini | return (count + (1 << icount_time_shift) - 1) >> icount_time_shift; |
362 | db1a4972 | Paolo Bonzini | } |
363 | db1a4972 | Paolo Bonzini | |
364 | db1a4972 | Paolo Bonzini | static struct qemu_alarm_timer alarm_timers[] = { |
365 | db1a4972 | Paolo Bonzini | #ifndef _WIN32
|
366 | db1a4972 | Paolo Bonzini | #ifdef __linux__
|
367 | db1a4972 | Paolo Bonzini | {"dynticks", dynticks_start_timer,
|
368 | db1a4972 | Paolo Bonzini | dynticks_stop_timer, dynticks_rearm_timer, NULL},
|
369 | db1a4972 | Paolo Bonzini | /* HPET - if available - is preferred */
|
370 | db1a4972 | Paolo Bonzini | {"hpet", hpet_start_timer, hpet_stop_timer, NULL, NULL}, |
371 | db1a4972 | Paolo Bonzini | /* ...otherwise try RTC */
|
372 | db1a4972 | Paolo Bonzini | {"rtc", rtc_start_timer, rtc_stop_timer, NULL, NULL}, |
373 | db1a4972 | Paolo Bonzini | #endif
|
374 | db1a4972 | Paolo Bonzini | {"unix", unix_start_timer, unix_stop_timer, NULL, NULL}, |
375 | db1a4972 | Paolo Bonzini | #else
|
376 | db1a4972 | Paolo Bonzini | {"dynticks", win32_start_timer,
|
377 | db1a4972 | Paolo Bonzini | win32_stop_timer, win32_rearm_timer, &alarm_win32_data}, |
378 | db1a4972 | Paolo Bonzini | {"win32", win32_start_timer,
|
379 | db1a4972 | Paolo Bonzini | win32_stop_timer, NULL, &alarm_win32_data},
|
380 | db1a4972 | Paolo Bonzini | #endif
|
381 | db1a4972 | Paolo Bonzini | {NULL, }
|
382 | db1a4972 | Paolo Bonzini | }; |
383 | db1a4972 | Paolo Bonzini | |
384 | db1a4972 | Paolo Bonzini | static void show_available_alarms(void) |
385 | db1a4972 | Paolo Bonzini | { |
386 | db1a4972 | Paolo Bonzini | int i;
|
387 | db1a4972 | Paolo Bonzini | |
388 | db1a4972 | Paolo Bonzini | printf("Available alarm timers, in order of precedence:\n");
|
389 | db1a4972 | Paolo Bonzini | for (i = 0; alarm_timers[i].name; i++) |
390 | db1a4972 | Paolo Bonzini | printf("%s\n", alarm_timers[i].name);
|
391 | db1a4972 | Paolo Bonzini | } |
392 | db1a4972 | Paolo Bonzini | |
393 | db1a4972 | Paolo Bonzini | void configure_alarms(char const *opt) |
394 | db1a4972 | Paolo Bonzini | { |
395 | db1a4972 | Paolo Bonzini | int i;
|
396 | db1a4972 | Paolo Bonzini | int cur = 0; |
397 | db1a4972 | Paolo Bonzini | int count = ARRAY_SIZE(alarm_timers) - 1; |
398 | db1a4972 | Paolo Bonzini | char *arg;
|
399 | db1a4972 | Paolo Bonzini | char *name;
|
400 | db1a4972 | Paolo Bonzini | struct qemu_alarm_timer tmp;
|
401 | db1a4972 | Paolo Bonzini | |
402 | db1a4972 | Paolo Bonzini | if (!strcmp(opt, "?")) { |
403 | db1a4972 | Paolo Bonzini | show_available_alarms(); |
404 | db1a4972 | Paolo Bonzini | exit(0);
|
405 | db1a4972 | Paolo Bonzini | } |
406 | db1a4972 | Paolo Bonzini | |
407 | db1a4972 | Paolo Bonzini | arg = qemu_strdup(opt); |
408 | db1a4972 | Paolo Bonzini | |
409 | db1a4972 | Paolo Bonzini | /* Reorder the array */
|
410 | db1a4972 | Paolo Bonzini | name = strtok(arg, ",");
|
411 | db1a4972 | Paolo Bonzini | while (name) {
|
412 | db1a4972 | Paolo Bonzini | for (i = 0; i < count && alarm_timers[i].name; i++) { |
413 | db1a4972 | Paolo Bonzini | if (!strcmp(alarm_timers[i].name, name))
|
414 | db1a4972 | Paolo Bonzini | break;
|
415 | db1a4972 | Paolo Bonzini | } |
416 | db1a4972 | Paolo Bonzini | |
417 | db1a4972 | Paolo Bonzini | if (i == count) {
|
418 | db1a4972 | Paolo Bonzini | fprintf(stderr, "Unknown clock %s\n", name);
|
419 | db1a4972 | Paolo Bonzini | goto next;
|
420 | db1a4972 | Paolo Bonzini | } |
421 | db1a4972 | Paolo Bonzini | |
422 | db1a4972 | Paolo Bonzini | if (i < cur)
|
423 | db1a4972 | Paolo Bonzini | /* Ignore */
|
424 | db1a4972 | Paolo Bonzini | goto next;
|
425 | db1a4972 | Paolo Bonzini | |
426 | db1a4972 | Paolo Bonzini | /* Swap */
|
427 | db1a4972 | Paolo Bonzini | tmp = alarm_timers[i]; |
428 | db1a4972 | Paolo Bonzini | alarm_timers[i] = alarm_timers[cur]; |
429 | db1a4972 | Paolo Bonzini | alarm_timers[cur] = tmp; |
430 | db1a4972 | Paolo Bonzini | |
431 | db1a4972 | Paolo Bonzini | cur++; |
432 | db1a4972 | Paolo Bonzini | next:
|
433 | db1a4972 | Paolo Bonzini | name = strtok(NULL, ","); |
434 | db1a4972 | Paolo Bonzini | } |
435 | db1a4972 | Paolo Bonzini | |
436 | db1a4972 | Paolo Bonzini | qemu_free(arg); |
437 | db1a4972 | Paolo Bonzini | |
438 | db1a4972 | Paolo Bonzini | if (cur) {
|
439 | db1a4972 | Paolo Bonzini | /* Disable remaining timers */
|
440 | db1a4972 | Paolo Bonzini | for (i = cur; i < count; i++)
|
441 | db1a4972 | Paolo Bonzini | alarm_timers[i].name = NULL;
|
442 | db1a4972 | Paolo Bonzini | } else {
|
443 | db1a4972 | Paolo Bonzini | show_available_alarms(); |
444 | db1a4972 | Paolo Bonzini | exit(1);
|
445 | db1a4972 | Paolo Bonzini | } |
446 | db1a4972 | Paolo Bonzini | } |
447 | db1a4972 | Paolo Bonzini | |
448 | db1a4972 | Paolo Bonzini | #define QEMU_NUM_CLOCKS 3 |
449 | db1a4972 | Paolo Bonzini | |
450 | db1a4972 | Paolo Bonzini | QEMUClock *rt_clock; |
451 | db1a4972 | Paolo Bonzini | QEMUClock *vm_clock; |
452 | db1a4972 | Paolo Bonzini | QEMUClock *host_clock; |
453 | db1a4972 | Paolo Bonzini | |
454 | db1a4972 | Paolo Bonzini | static QEMUTimer *active_timers[QEMU_NUM_CLOCKS];
|
455 | db1a4972 | Paolo Bonzini | |
456 | db1a4972 | Paolo Bonzini | static QEMUClock *qemu_new_clock(int type) |
457 | db1a4972 | Paolo Bonzini | { |
458 | db1a4972 | Paolo Bonzini | QEMUClock *clock; |
459 | db1a4972 | Paolo Bonzini | clock = qemu_mallocz(sizeof(QEMUClock));
|
460 | db1a4972 | Paolo Bonzini | clock->type = type; |
461 | db1a4972 | Paolo Bonzini | clock->enabled = 1;
|
462 | db1a4972 | Paolo Bonzini | return clock;
|
463 | db1a4972 | Paolo Bonzini | } |
464 | db1a4972 | Paolo Bonzini | |
465 | db1a4972 | Paolo Bonzini | void qemu_clock_enable(QEMUClock *clock, int enabled) |
466 | db1a4972 | Paolo Bonzini | { |
467 | db1a4972 | Paolo Bonzini | clock->enabled = enabled; |
468 | db1a4972 | Paolo Bonzini | } |
469 | db1a4972 | Paolo Bonzini | |
470 | db1a4972 | Paolo Bonzini | QEMUTimer *qemu_new_timer(QEMUClock *clock, QEMUTimerCB *cb, void *opaque)
|
471 | db1a4972 | Paolo Bonzini | { |
472 | db1a4972 | Paolo Bonzini | QEMUTimer *ts; |
473 | db1a4972 | Paolo Bonzini | |
474 | db1a4972 | Paolo Bonzini | ts = qemu_mallocz(sizeof(QEMUTimer));
|
475 | db1a4972 | Paolo Bonzini | ts->clock = clock; |
476 | db1a4972 | Paolo Bonzini | ts->cb = cb; |
477 | db1a4972 | Paolo Bonzini | ts->opaque = opaque; |
478 | db1a4972 | Paolo Bonzini | return ts;
|
479 | db1a4972 | Paolo Bonzini | } |
480 | db1a4972 | Paolo Bonzini | |
481 | db1a4972 | Paolo Bonzini | void qemu_free_timer(QEMUTimer *ts)
|
482 | db1a4972 | Paolo Bonzini | { |
483 | db1a4972 | Paolo Bonzini | qemu_free(ts); |
484 | db1a4972 | Paolo Bonzini | } |
485 | db1a4972 | Paolo Bonzini | |
486 | db1a4972 | Paolo Bonzini | /* stop a timer, but do not dealloc it */
|
487 | db1a4972 | Paolo Bonzini | void qemu_del_timer(QEMUTimer *ts)
|
488 | db1a4972 | Paolo Bonzini | { |
489 | db1a4972 | Paolo Bonzini | QEMUTimer **pt, *t; |
490 | db1a4972 | Paolo Bonzini | |
491 | db1a4972 | Paolo Bonzini | /* NOTE: this code must be signal safe because
|
492 | db1a4972 | Paolo Bonzini | qemu_timer_expired() can be called from a signal. */
|
493 | db1a4972 | Paolo Bonzini | pt = &active_timers[ts->clock->type]; |
494 | db1a4972 | Paolo Bonzini | for(;;) {
|
495 | db1a4972 | Paolo Bonzini | t = *pt; |
496 | db1a4972 | Paolo Bonzini | if (!t)
|
497 | db1a4972 | Paolo Bonzini | break;
|
498 | db1a4972 | Paolo Bonzini | if (t == ts) {
|
499 | db1a4972 | Paolo Bonzini | *pt = t->next; |
500 | db1a4972 | Paolo Bonzini | break;
|
501 | db1a4972 | Paolo Bonzini | } |
502 | db1a4972 | Paolo Bonzini | pt = &t->next; |
503 | db1a4972 | Paolo Bonzini | } |
504 | db1a4972 | Paolo Bonzini | } |
505 | db1a4972 | Paolo Bonzini | |
506 | db1a4972 | Paolo Bonzini | /* modify the current timer so that it will be fired when current_time
|
507 | db1a4972 | Paolo Bonzini | >= expire_time. The corresponding callback will be called. */
|
508 | db1a4972 | Paolo Bonzini | void qemu_mod_timer(QEMUTimer *ts, int64_t expire_time)
|
509 | db1a4972 | Paolo Bonzini | { |
510 | db1a4972 | Paolo Bonzini | QEMUTimer **pt, *t; |
511 | db1a4972 | Paolo Bonzini | |
512 | db1a4972 | Paolo Bonzini | qemu_del_timer(ts); |
513 | db1a4972 | Paolo Bonzini | |
514 | db1a4972 | Paolo Bonzini | /* add the timer in the sorted list */
|
515 | db1a4972 | Paolo Bonzini | /* NOTE: this code must be signal safe because
|
516 | db1a4972 | Paolo Bonzini | qemu_timer_expired() can be called from a signal. */
|
517 | db1a4972 | Paolo Bonzini | pt = &active_timers[ts->clock->type]; |
518 | db1a4972 | Paolo Bonzini | for(;;) {
|
519 | db1a4972 | Paolo Bonzini | t = *pt; |
520 | db1a4972 | Paolo Bonzini | if (!t)
|
521 | db1a4972 | Paolo Bonzini | break;
|
522 | db1a4972 | Paolo Bonzini | if (t->expire_time > expire_time)
|
523 | db1a4972 | Paolo Bonzini | break;
|
524 | db1a4972 | Paolo Bonzini | pt = &t->next; |
525 | db1a4972 | Paolo Bonzini | } |
526 | db1a4972 | Paolo Bonzini | ts->expire_time = expire_time; |
527 | db1a4972 | Paolo Bonzini | ts->next = *pt; |
528 | db1a4972 | Paolo Bonzini | *pt = ts; |
529 | db1a4972 | Paolo Bonzini | |
530 | db1a4972 | Paolo Bonzini | /* Rearm if necessary */
|
531 | db1a4972 | Paolo Bonzini | if (pt == &active_timers[ts->clock->type]) {
|
532 | db1a4972 | Paolo Bonzini | if (!alarm_timer->pending) {
|
533 | db1a4972 | Paolo Bonzini | qemu_rearm_alarm_timer(alarm_timer); |
534 | db1a4972 | Paolo Bonzini | } |
535 | db1a4972 | Paolo Bonzini | /* Interrupt execution to force deadline recalculation. */
|
536 | db1a4972 | Paolo Bonzini | if (use_icount)
|
537 | db1a4972 | Paolo Bonzini | qemu_notify_event(); |
538 | db1a4972 | Paolo Bonzini | } |
539 | db1a4972 | Paolo Bonzini | } |
540 | db1a4972 | Paolo Bonzini | |
541 | db1a4972 | Paolo Bonzini | int qemu_timer_pending(QEMUTimer *ts)
|
542 | db1a4972 | Paolo Bonzini | { |
543 | db1a4972 | Paolo Bonzini | QEMUTimer *t; |
544 | db1a4972 | Paolo Bonzini | for(t = active_timers[ts->clock->type]; t != NULL; t = t->next) { |
545 | db1a4972 | Paolo Bonzini | if (t == ts)
|
546 | db1a4972 | Paolo Bonzini | return 1; |
547 | db1a4972 | Paolo Bonzini | } |
548 | db1a4972 | Paolo Bonzini | return 0; |
549 | db1a4972 | Paolo Bonzini | } |
550 | db1a4972 | Paolo Bonzini | |
551 | db1a4972 | Paolo Bonzini | int qemu_timer_expired(QEMUTimer *timer_head, int64_t current_time)
|
552 | db1a4972 | Paolo Bonzini | { |
553 | db1a4972 | Paolo Bonzini | if (!timer_head)
|
554 | db1a4972 | Paolo Bonzini | return 0; |
555 | db1a4972 | Paolo Bonzini | return (timer_head->expire_time <= current_time);
|
556 | db1a4972 | Paolo Bonzini | } |
557 | db1a4972 | Paolo Bonzini | |
558 | db1a4972 | Paolo Bonzini | static void qemu_run_timers(QEMUClock *clock) |
559 | db1a4972 | Paolo Bonzini | { |
560 | db1a4972 | Paolo Bonzini | QEMUTimer **ptimer_head, *ts; |
561 | db1a4972 | Paolo Bonzini | int64_t current_time; |
562 | db1a4972 | Paolo Bonzini | |
563 | db1a4972 | Paolo Bonzini | if (!clock->enabled)
|
564 | db1a4972 | Paolo Bonzini | return;
|
565 | db1a4972 | Paolo Bonzini | |
566 | db1a4972 | Paolo Bonzini | current_time = qemu_get_clock (clock); |
567 | db1a4972 | Paolo Bonzini | ptimer_head = &active_timers[clock->type]; |
568 | db1a4972 | Paolo Bonzini | for(;;) {
|
569 | db1a4972 | Paolo Bonzini | ts = *ptimer_head; |
570 | db1a4972 | Paolo Bonzini | if (!ts || ts->expire_time > current_time)
|
571 | db1a4972 | Paolo Bonzini | break;
|
572 | db1a4972 | Paolo Bonzini | /* remove timer from the list before calling the callback */
|
573 | db1a4972 | Paolo Bonzini | *ptimer_head = ts->next; |
574 | db1a4972 | Paolo Bonzini | ts->next = NULL;
|
575 | db1a4972 | Paolo Bonzini | |
576 | db1a4972 | Paolo Bonzini | /* run the callback (the timer list can be modified) */
|
577 | db1a4972 | Paolo Bonzini | ts->cb(ts->opaque); |
578 | db1a4972 | Paolo Bonzini | } |
579 | db1a4972 | Paolo Bonzini | } |
580 | db1a4972 | Paolo Bonzini | |
581 | db1a4972 | Paolo Bonzini | int64_t qemu_get_clock(QEMUClock *clock) |
582 | db1a4972 | Paolo Bonzini | { |
583 | db1a4972 | Paolo Bonzini | switch(clock->type) {
|
584 | db1a4972 | Paolo Bonzini | case QEMU_CLOCK_REALTIME:
|
585 | db1a4972 | Paolo Bonzini | return get_clock() / 1000000; |
586 | db1a4972 | Paolo Bonzini | default:
|
587 | db1a4972 | Paolo Bonzini | case QEMU_CLOCK_VIRTUAL:
|
588 | db1a4972 | Paolo Bonzini | if (use_icount) {
|
589 | db1a4972 | Paolo Bonzini | return cpu_get_icount();
|
590 | db1a4972 | Paolo Bonzini | } else {
|
591 | db1a4972 | Paolo Bonzini | return cpu_get_clock();
|
592 | db1a4972 | Paolo Bonzini | } |
593 | db1a4972 | Paolo Bonzini | case QEMU_CLOCK_HOST:
|
594 | db1a4972 | Paolo Bonzini | return get_clock_realtime();
|
595 | db1a4972 | Paolo Bonzini | } |
596 | db1a4972 | Paolo Bonzini | } |
597 | db1a4972 | Paolo Bonzini | |
598 | db1a4972 | Paolo Bonzini | int64_t qemu_get_clock_ns(QEMUClock *clock) |
599 | db1a4972 | Paolo Bonzini | { |
600 | db1a4972 | Paolo Bonzini | switch(clock->type) {
|
601 | db1a4972 | Paolo Bonzini | case QEMU_CLOCK_REALTIME:
|
602 | db1a4972 | Paolo Bonzini | return get_clock();
|
603 | db1a4972 | Paolo Bonzini | default:
|
604 | db1a4972 | Paolo Bonzini | case QEMU_CLOCK_VIRTUAL:
|
605 | db1a4972 | Paolo Bonzini | if (use_icount) {
|
606 | db1a4972 | Paolo Bonzini | return cpu_get_icount();
|
607 | db1a4972 | Paolo Bonzini | } else {
|
608 | db1a4972 | Paolo Bonzini | return cpu_get_clock();
|
609 | db1a4972 | Paolo Bonzini | } |
610 | db1a4972 | Paolo Bonzini | case QEMU_CLOCK_HOST:
|
611 | db1a4972 | Paolo Bonzini | return get_clock_realtime();
|
612 | db1a4972 | Paolo Bonzini | } |
613 | db1a4972 | Paolo Bonzini | } |
614 | db1a4972 | Paolo Bonzini | |
615 | db1a4972 | Paolo Bonzini | void init_clocks(void) |
616 | db1a4972 | Paolo Bonzini | { |
617 | db1a4972 | Paolo Bonzini | init_get_clock(); |
618 | db1a4972 | Paolo Bonzini | rt_clock = qemu_new_clock(QEMU_CLOCK_REALTIME); |
619 | db1a4972 | Paolo Bonzini | vm_clock = qemu_new_clock(QEMU_CLOCK_VIRTUAL); |
620 | db1a4972 | Paolo Bonzini | host_clock = qemu_new_clock(QEMU_CLOCK_HOST); |
621 | db1a4972 | Paolo Bonzini | |
622 | db1a4972 | Paolo Bonzini | rtc_clock = host_clock; |
623 | db1a4972 | Paolo Bonzini | } |
624 | db1a4972 | Paolo Bonzini | |
625 | db1a4972 | Paolo Bonzini | /* save a timer */
|
626 | db1a4972 | Paolo Bonzini | void qemu_put_timer(QEMUFile *f, QEMUTimer *ts)
|
627 | db1a4972 | Paolo Bonzini | { |
628 | db1a4972 | Paolo Bonzini | uint64_t expire_time; |
629 | db1a4972 | Paolo Bonzini | |
630 | db1a4972 | Paolo Bonzini | if (qemu_timer_pending(ts)) {
|
631 | db1a4972 | Paolo Bonzini | expire_time = ts->expire_time; |
632 | db1a4972 | Paolo Bonzini | } else {
|
633 | db1a4972 | Paolo Bonzini | expire_time = -1;
|
634 | db1a4972 | Paolo Bonzini | } |
635 | db1a4972 | Paolo Bonzini | qemu_put_be64(f, expire_time); |
636 | db1a4972 | Paolo Bonzini | } |
637 | db1a4972 | Paolo Bonzini | |
638 | db1a4972 | Paolo Bonzini | void qemu_get_timer(QEMUFile *f, QEMUTimer *ts)
|
639 | db1a4972 | Paolo Bonzini | { |
640 | db1a4972 | Paolo Bonzini | uint64_t expire_time; |
641 | db1a4972 | Paolo Bonzini | |
642 | db1a4972 | Paolo Bonzini | expire_time = qemu_get_be64(f); |
643 | db1a4972 | Paolo Bonzini | if (expire_time != -1) { |
644 | db1a4972 | Paolo Bonzini | qemu_mod_timer(ts, expire_time); |
645 | db1a4972 | Paolo Bonzini | } else {
|
646 | db1a4972 | Paolo Bonzini | qemu_del_timer(ts); |
647 | db1a4972 | Paolo Bonzini | } |
648 | db1a4972 | Paolo Bonzini | } |
649 | db1a4972 | Paolo Bonzini | |
650 | db1a4972 | Paolo Bonzini | static const VMStateDescription vmstate_timers = { |
651 | db1a4972 | Paolo Bonzini | .name = "timer",
|
652 | db1a4972 | Paolo Bonzini | .version_id = 2,
|
653 | db1a4972 | Paolo Bonzini | .minimum_version_id = 1,
|
654 | db1a4972 | Paolo Bonzini | .minimum_version_id_old = 1,
|
655 | db1a4972 | Paolo Bonzini | .fields = (VMStateField []) { |
656 | db1a4972 | Paolo Bonzini | VMSTATE_INT64(cpu_ticks_offset, TimersState), |
657 | db1a4972 | Paolo Bonzini | VMSTATE_INT64(dummy, TimersState), |
658 | db1a4972 | Paolo Bonzini | VMSTATE_INT64_V(cpu_clock_offset, TimersState, 2),
|
659 | db1a4972 | Paolo Bonzini | VMSTATE_END_OF_LIST() |
660 | db1a4972 | Paolo Bonzini | } |
661 | db1a4972 | Paolo Bonzini | }; |
662 | db1a4972 | Paolo Bonzini | |
663 | db1a4972 | Paolo Bonzini | void configure_icount(const char *option) |
664 | db1a4972 | Paolo Bonzini | { |
665 | db1a4972 | Paolo Bonzini | vmstate_register(0, &vmstate_timers, &timers_state);
|
666 | db1a4972 | Paolo Bonzini | if (!option)
|
667 | db1a4972 | Paolo Bonzini | return;
|
668 | db1a4972 | Paolo Bonzini | |
669 | db1a4972 | Paolo Bonzini | if (strcmp(option, "auto") != 0) { |
670 | db1a4972 | Paolo Bonzini | icount_time_shift = strtol(option, NULL, 0); |
671 | db1a4972 | Paolo Bonzini | use_icount = 1;
|
672 | db1a4972 | Paolo Bonzini | return;
|
673 | db1a4972 | Paolo Bonzini | } |
674 | db1a4972 | Paolo Bonzini | |
675 | db1a4972 | Paolo Bonzini | use_icount = 2;
|
676 | db1a4972 | Paolo Bonzini | |
677 | db1a4972 | Paolo Bonzini | /* 125MIPS seems a reasonable initial guess at the guest speed.
|
678 | db1a4972 | Paolo Bonzini | It will be corrected fairly quickly anyway. */
|
679 | db1a4972 | Paolo Bonzini | icount_time_shift = 3;
|
680 | db1a4972 | Paolo Bonzini | |
681 | db1a4972 | Paolo Bonzini | /* Have both realtime and virtual time triggers for speed adjustment.
|
682 | db1a4972 | Paolo Bonzini | The realtime trigger catches emulated time passing too slowly,
|
683 | db1a4972 | Paolo Bonzini | the virtual time trigger catches emulated time passing too fast.
|
684 | db1a4972 | Paolo Bonzini | Realtime triggers occur even when idle, so use them less frequently
|
685 | db1a4972 | Paolo Bonzini | than VM triggers. */
|
686 | db1a4972 | Paolo Bonzini | icount_rt_timer = qemu_new_timer(rt_clock, icount_adjust_rt, NULL);
|
687 | db1a4972 | Paolo Bonzini | qemu_mod_timer(icount_rt_timer, |
688 | db1a4972 | Paolo Bonzini | qemu_get_clock(rt_clock) + 1000);
|
689 | db1a4972 | Paolo Bonzini | icount_vm_timer = qemu_new_timer(vm_clock, icount_adjust_vm, NULL);
|
690 | db1a4972 | Paolo Bonzini | qemu_mod_timer(icount_vm_timer, |
691 | db1a4972 | Paolo Bonzini | qemu_get_clock(vm_clock) + get_ticks_per_sec() / 10);
|
692 | db1a4972 | Paolo Bonzini | } |
693 | db1a4972 | Paolo Bonzini | |
694 | db1a4972 | Paolo Bonzini | void qemu_run_all_timers(void) |
695 | db1a4972 | Paolo Bonzini | { |
696 | ca5a2a4b | Paolo Bonzini | alarm_timer->pending = 0;
|
697 | ca5a2a4b | Paolo Bonzini | |
698 | db1a4972 | Paolo Bonzini | /* rearm timer, if not periodic */
|
699 | db1a4972 | Paolo Bonzini | if (alarm_timer->expired) {
|
700 | db1a4972 | Paolo Bonzini | alarm_timer->expired = 0;
|
701 | db1a4972 | Paolo Bonzini | qemu_rearm_alarm_timer(alarm_timer); |
702 | db1a4972 | Paolo Bonzini | } |
703 | db1a4972 | Paolo Bonzini | |
704 | db1a4972 | Paolo Bonzini | /* vm time timers */
|
705 | db1a4972 | Paolo Bonzini | if (vm_running) {
|
706 | db1a4972 | Paolo Bonzini | qemu_run_timers(vm_clock); |
707 | db1a4972 | Paolo Bonzini | } |
708 | db1a4972 | Paolo Bonzini | |
709 | db1a4972 | Paolo Bonzini | qemu_run_timers(rt_clock); |
710 | db1a4972 | Paolo Bonzini | qemu_run_timers(host_clock); |
711 | db1a4972 | Paolo Bonzini | } |
712 | db1a4972 | Paolo Bonzini | |
713 | db1a4972 | Paolo Bonzini | #ifdef _WIN32
|
714 | db1a4972 | Paolo Bonzini | static void CALLBACK host_alarm_handler(UINT uTimerID, UINT uMsg, |
715 | db1a4972 | Paolo Bonzini | DWORD_PTR dwUser, DWORD_PTR dw1, |
716 | db1a4972 | Paolo Bonzini | DWORD_PTR dw2) |
717 | db1a4972 | Paolo Bonzini | #else
|
718 | db1a4972 | Paolo Bonzini | static void host_alarm_handler(int host_signum) |
719 | db1a4972 | Paolo Bonzini | #endif
|
720 | db1a4972 | Paolo Bonzini | { |
721 | db1a4972 | Paolo Bonzini | struct qemu_alarm_timer *t = alarm_timer;
|
722 | db1a4972 | Paolo Bonzini | if (!t)
|
723 | db1a4972 | Paolo Bonzini | return;
|
724 | db1a4972 | Paolo Bonzini | |
725 | db1a4972 | Paolo Bonzini | #if 0
|
726 | db1a4972 | Paolo Bonzini | #define DISP_FREQ 1000
|
727 | db1a4972 | Paolo Bonzini | {
|
728 | db1a4972 | Paolo Bonzini | static int64_t delta_min = INT64_MAX;
|
729 | db1a4972 | Paolo Bonzini | static int64_t delta_max, delta_cum, last_clock, delta, ti;
|
730 | db1a4972 | Paolo Bonzini | static int count;
|
731 | db1a4972 | Paolo Bonzini | ti = qemu_get_clock(vm_clock);
|
732 | db1a4972 | Paolo Bonzini | if (last_clock != 0) {
|
733 | db1a4972 | Paolo Bonzini | delta = ti - last_clock;
|
734 | db1a4972 | Paolo Bonzini | if (delta < delta_min)
|
735 | db1a4972 | Paolo Bonzini | delta_min = delta;
|
736 | db1a4972 | Paolo Bonzini | if (delta > delta_max)
|
737 | db1a4972 | Paolo Bonzini | delta_max = delta;
|
738 | db1a4972 | Paolo Bonzini | delta_cum += delta;
|
739 | db1a4972 | Paolo Bonzini | if (++count == DISP_FREQ) {
|
740 | db1a4972 | Paolo Bonzini | printf("timer: min=%" PRId64 " us max=%" PRId64 " us avg=%" PRId64 " us avg_freq=%0.3f Hz\n",
|
741 | db1a4972 | Paolo Bonzini | muldiv64(delta_min, 1000000, get_ticks_per_sec()),
|
742 | db1a4972 | Paolo Bonzini | muldiv64(delta_max, 1000000, get_ticks_per_sec()),
|
743 | db1a4972 | Paolo Bonzini | muldiv64(delta_cum, 1000000 / DISP_FREQ, get_ticks_per_sec()),
|
744 | db1a4972 | Paolo Bonzini | (double)get_ticks_per_sec() / ((double)delta_cum / DISP_FREQ));
|
745 | db1a4972 | Paolo Bonzini | count = 0;
|
746 | db1a4972 | Paolo Bonzini | delta_min = INT64_MAX;
|
747 | db1a4972 | Paolo Bonzini | delta_max = 0;
|
748 | db1a4972 | Paolo Bonzini | delta_cum = 0;
|
749 | db1a4972 | Paolo Bonzini | }
|
750 | db1a4972 | Paolo Bonzini | }
|
751 | db1a4972 | Paolo Bonzini | last_clock = ti;
|
752 | db1a4972 | Paolo Bonzini | }
|
753 | db1a4972 | Paolo Bonzini | #endif
|
754 | db1a4972 | Paolo Bonzini | if (alarm_has_dynticks(t) ||
|
755 | db1a4972 | Paolo Bonzini | (!use_icount && |
756 | db1a4972 | Paolo Bonzini | qemu_timer_expired(active_timers[QEMU_CLOCK_VIRTUAL], |
757 | db1a4972 | Paolo Bonzini | qemu_get_clock(vm_clock))) || |
758 | db1a4972 | Paolo Bonzini | qemu_timer_expired(active_timers[QEMU_CLOCK_REALTIME], |
759 | db1a4972 | Paolo Bonzini | qemu_get_clock(rt_clock)) || |
760 | db1a4972 | Paolo Bonzini | qemu_timer_expired(active_timers[QEMU_CLOCK_HOST], |
761 | db1a4972 | Paolo Bonzini | qemu_get_clock(host_clock))) { |
762 | db1a4972 | Paolo Bonzini | |
763 | db1a4972 | Paolo Bonzini | t->expired = alarm_has_dynticks(t); |
764 | db1a4972 | Paolo Bonzini | t->pending = 1;
|
765 | db1a4972 | Paolo Bonzini | qemu_notify_event(); |
766 | db1a4972 | Paolo Bonzini | } |
767 | db1a4972 | Paolo Bonzini | } |
768 | db1a4972 | Paolo Bonzini | |
769 | db1a4972 | Paolo Bonzini | int64_t qemu_next_deadline(void)
|
770 | db1a4972 | Paolo Bonzini | { |
771 | db1a4972 | Paolo Bonzini | /* To avoid problems with overflow limit this to 2^32. */
|
772 | db1a4972 | Paolo Bonzini | int64_t delta = INT32_MAX; |
773 | db1a4972 | Paolo Bonzini | |
774 | db1a4972 | Paolo Bonzini | if (active_timers[QEMU_CLOCK_VIRTUAL]) {
|
775 | db1a4972 | Paolo Bonzini | delta = active_timers[QEMU_CLOCK_VIRTUAL]->expire_time - |
776 | db1a4972 | Paolo Bonzini | qemu_get_clock(vm_clock); |
777 | db1a4972 | Paolo Bonzini | } |
778 | db1a4972 | Paolo Bonzini | if (active_timers[QEMU_CLOCK_HOST]) {
|
779 | db1a4972 | Paolo Bonzini | int64_t hdelta = active_timers[QEMU_CLOCK_HOST]->expire_time - |
780 | db1a4972 | Paolo Bonzini | qemu_get_clock(host_clock); |
781 | db1a4972 | Paolo Bonzini | if (hdelta < delta)
|
782 | db1a4972 | Paolo Bonzini | delta = hdelta; |
783 | db1a4972 | Paolo Bonzini | } |
784 | db1a4972 | Paolo Bonzini | |
785 | db1a4972 | Paolo Bonzini | if (delta < 0) |
786 | db1a4972 | Paolo Bonzini | delta = 0;
|
787 | db1a4972 | Paolo Bonzini | |
788 | db1a4972 | Paolo Bonzini | return delta;
|
789 | db1a4972 | Paolo Bonzini | } |
790 | db1a4972 | Paolo Bonzini | |
791 | db1a4972 | Paolo Bonzini | #ifndef _WIN32
|
792 | db1a4972 | Paolo Bonzini | |
793 | db1a4972 | Paolo Bonzini | #if defined(__linux__)
|
794 | db1a4972 | Paolo Bonzini | |
795 | db1a4972 | Paolo Bonzini | #define RTC_FREQ 1024 |
796 | db1a4972 | Paolo Bonzini | |
797 | db1a4972 | Paolo Bonzini | static uint64_t qemu_next_deadline_dyntick(void) |
798 | db1a4972 | Paolo Bonzini | { |
799 | db1a4972 | Paolo Bonzini | int64_t delta; |
800 | db1a4972 | Paolo Bonzini | int64_t rtdelta; |
801 | db1a4972 | Paolo Bonzini | |
802 | db1a4972 | Paolo Bonzini | if (use_icount)
|
803 | db1a4972 | Paolo Bonzini | delta = INT32_MAX; |
804 | db1a4972 | Paolo Bonzini | else
|
805 | db1a4972 | Paolo Bonzini | delta = (qemu_next_deadline() + 999) / 1000; |
806 | db1a4972 | Paolo Bonzini | |
807 | db1a4972 | Paolo Bonzini | if (active_timers[QEMU_CLOCK_REALTIME]) {
|
808 | db1a4972 | Paolo Bonzini | rtdelta = (active_timers[QEMU_CLOCK_REALTIME]->expire_time - |
809 | db1a4972 | Paolo Bonzini | qemu_get_clock(rt_clock))*1000;
|
810 | db1a4972 | Paolo Bonzini | if (rtdelta < delta)
|
811 | db1a4972 | Paolo Bonzini | delta = rtdelta; |
812 | db1a4972 | Paolo Bonzini | } |
813 | db1a4972 | Paolo Bonzini | |
814 | db1a4972 | Paolo Bonzini | if (delta < MIN_TIMER_REARM_US)
|
815 | db1a4972 | Paolo Bonzini | delta = MIN_TIMER_REARM_US; |
816 | db1a4972 | Paolo Bonzini | |
817 | db1a4972 | Paolo Bonzini | return delta;
|
818 | db1a4972 | Paolo Bonzini | } |
819 | db1a4972 | Paolo Bonzini | |
820 | db1a4972 | Paolo Bonzini | static void enable_sigio_timer(int fd) |
821 | db1a4972 | Paolo Bonzini | { |
822 | db1a4972 | Paolo Bonzini | struct sigaction act;
|
823 | db1a4972 | Paolo Bonzini | |
824 | db1a4972 | Paolo Bonzini | /* timer signal */
|
825 | db1a4972 | Paolo Bonzini | sigfillset(&act.sa_mask); |
826 | db1a4972 | Paolo Bonzini | act.sa_flags = 0;
|
827 | db1a4972 | Paolo Bonzini | act.sa_handler = host_alarm_handler; |
828 | db1a4972 | Paolo Bonzini | |
829 | db1a4972 | Paolo Bonzini | sigaction(SIGIO, &act, NULL);
|
830 | db1a4972 | Paolo Bonzini | fcntl_setfl(fd, O_ASYNC); |
831 | db1a4972 | Paolo Bonzini | fcntl(fd, F_SETOWN, getpid()); |
832 | db1a4972 | Paolo Bonzini | } |
833 | db1a4972 | Paolo Bonzini | |
834 | db1a4972 | Paolo Bonzini | static int hpet_start_timer(struct qemu_alarm_timer *t) |
835 | db1a4972 | Paolo Bonzini | { |
836 | db1a4972 | Paolo Bonzini | struct hpet_info info;
|
837 | db1a4972 | Paolo Bonzini | int r, fd;
|
838 | db1a4972 | Paolo Bonzini | |
839 | db1a4972 | Paolo Bonzini | fd = qemu_open("/dev/hpet", O_RDONLY);
|
840 | db1a4972 | Paolo Bonzini | if (fd < 0) |
841 | db1a4972 | Paolo Bonzini | return -1; |
842 | db1a4972 | Paolo Bonzini | |
843 | db1a4972 | Paolo Bonzini | /* Set frequency */
|
844 | db1a4972 | Paolo Bonzini | r = ioctl(fd, HPET_IRQFREQ, RTC_FREQ); |
845 | db1a4972 | Paolo Bonzini | if (r < 0) { |
846 | db1a4972 | Paolo Bonzini | fprintf(stderr, "Could not configure '/dev/hpet' to have a 1024Hz timer. This is not a fatal\n"
|
847 | db1a4972 | Paolo Bonzini | "error, but for better emulation accuracy type:\n"
|
848 | db1a4972 | Paolo Bonzini | "'echo 1024 > /proc/sys/dev/hpet/max-user-freq' as root.\n");
|
849 | db1a4972 | Paolo Bonzini | goto fail;
|
850 | db1a4972 | Paolo Bonzini | } |
851 | db1a4972 | Paolo Bonzini | |
852 | db1a4972 | Paolo Bonzini | /* Check capabilities */
|
853 | db1a4972 | Paolo Bonzini | r = ioctl(fd, HPET_INFO, &info); |
854 | db1a4972 | Paolo Bonzini | if (r < 0) |
855 | db1a4972 | Paolo Bonzini | goto fail;
|
856 | db1a4972 | Paolo Bonzini | |
857 | db1a4972 | Paolo Bonzini | /* Enable periodic mode */
|
858 | db1a4972 | Paolo Bonzini | r = ioctl(fd, HPET_EPI, 0);
|
859 | db1a4972 | Paolo Bonzini | if (info.hi_flags && (r < 0)) |
860 | db1a4972 | Paolo Bonzini | goto fail;
|
861 | db1a4972 | Paolo Bonzini | |
862 | db1a4972 | Paolo Bonzini | /* Enable interrupt */
|
863 | db1a4972 | Paolo Bonzini | r = ioctl(fd, HPET_IE_ON, 0);
|
864 | db1a4972 | Paolo Bonzini | if (r < 0) |
865 | db1a4972 | Paolo Bonzini | goto fail;
|
866 | db1a4972 | Paolo Bonzini | |
867 | db1a4972 | Paolo Bonzini | enable_sigio_timer(fd); |
868 | db1a4972 | Paolo Bonzini | t->priv = (void *)(long)fd; |
869 | db1a4972 | Paolo Bonzini | |
870 | db1a4972 | Paolo Bonzini | return 0; |
871 | db1a4972 | Paolo Bonzini | fail:
|
872 | db1a4972 | Paolo Bonzini | close(fd); |
873 | db1a4972 | Paolo Bonzini | return -1; |
874 | db1a4972 | Paolo Bonzini | } |
875 | db1a4972 | Paolo Bonzini | |
876 | db1a4972 | Paolo Bonzini | static void hpet_stop_timer(struct qemu_alarm_timer *t) |
877 | db1a4972 | Paolo Bonzini | { |
878 | db1a4972 | Paolo Bonzini | int fd = (long)t->priv; |
879 | db1a4972 | Paolo Bonzini | |
880 | db1a4972 | Paolo Bonzini | close(fd); |
881 | db1a4972 | Paolo Bonzini | } |
882 | db1a4972 | Paolo Bonzini | |
883 | db1a4972 | Paolo Bonzini | static int rtc_start_timer(struct qemu_alarm_timer *t) |
884 | db1a4972 | Paolo Bonzini | { |
885 | db1a4972 | Paolo Bonzini | int rtc_fd;
|
886 | db1a4972 | Paolo Bonzini | unsigned long current_rtc_freq = 0; |
887 | db1a4972 | Paolo Bonzini | |
888 | db1a4972 | Paolo Bonzini | TFR(rtc_fd = qemu_open("/dev/rtc", O_RDONLY));
|
889 | db1a4972 | Paolo Bonzini | if (rtc_fd < 0) |
890 | db1a4972 | Paolo Bonzini | return -1; |
891 | db1a4972 | Paolo Bonzini | ioctl(rtc_fd, RTC_IRQP_READ, ¤t_rtc_freq); |
892 | db1a4972 | Paolo Bonzini | if (current_rtc_freq != RTC_FREQ &&
|
893 | db1a4972 | Paolo Bonzini | ioctl(rtc_fd, RTC_IRQP_SET, RTC_FREQ) < 0) {
|
894 | db1a4972 | Paolo Bonzini | fprintf(stderr, "Could not configure '/dev/rtc' to have a 1024 Hz timer. This is not a fatal\n"
|
895 | db1a4972 | Paolo Bonzini | "error, but for better emulation accuracy either use a 2.6 host Linux kernel or\n"
|
896 | db1a4972 | Paolo Bonzini | "type 'echo 1024 > /proc/sys/dev/rtc/max-user-freq' as root.\n");
|
897 | db1a4972 | Paolo Bonzini | goto fail;
|
898 | db1a4972 | Paolo Bonzini | } |
899 | db1a4972 | Paolo Bonzini | if (ioctl(rtc_fd, RTC_PIE_ON, 0) < 0) { |
900 | db1a4972 | Paolo Bonzini | fail:
|
901 | db1a4972 | Paolo Bonzini | close(rtc_fd); |
902 | db1a4972 | Paolo Bonzini | return -1; |
903 | db1a4972 | Paolo Bonzini | } |
904 | db1a4972 | Paolo Bonzini | |
905 | db1a4972 | Paolo Bonzini | enable_sigio_timer(rtc_fd); |
906 | db1a4972 | Paolo Bonzini | |
907 | db1a4972 | Paolo Bonzini | t->priv = (void *)(long)rtc_fd; |
908 | db1a4972 | Paolo Bonzini | |
909 | db1a4972 | Paolo Bonzini | return 0; |
910 | db1a4972 | Paolo Bonzini | } |
911 | db1a4972 | Paolo Bonzini | |
912 | db1a4972 | Paolo Bonzini | static void rtc_stop_timer(struct qemu_alarm_timer *t) |
913 | db1a4972 | Paolo Bonzini | { |
914 | db1a4972 | Paolo Bonzini | int rtc_fd = (long)t->priv; |
915 | db1a4972 | Paolo Bonzini | |
916 | db1a4972 | Paolo Bonzini | close(rtc_fd); |
917 | db1a4972 | Paolo Bonzini | } |
918 | db1a4972 | Paolo Bonzini | |
919 | db1a4972 | Paolo Bonzini | static int dynticks_start_timer(struct qemu_alarm_timer *t) |
920 | db1a4972 | Paolo Bonzini | { |
921 | db1a4972 | Paolo Bonzini | struct sigevent ev;
|
922 | db1a4972 | Paolo Bonzini | timer_t host_timer; |
923 | db1a4972 | Paolo Bonzini | struct sigaction act;
|
924 | db1a4972 | Paolo Bonzini | |
925 | db1a4972 | Paolo Bonzini | sigfillset(&act.sa_mask); |
926 | db1a4972 | Paolo Bonzini | act.sa_flags = 0;
|
927 | db1a4972 | Paolo Bonzini | act.sa_handler = host_alarm_handler; |
928 | db1a4972 | Paolo Bonzini | |
929 | db1a4972 | Paolo Bonzini | sigaction(SIGALRM, &act, NULL);
|
930 | db1a4972 | Paolo Bonzini | |
931 | db1a4972 | Paolo Bonzini | /*
|
932 | db1a4972 | Paolo Bonzini | * Initialize ev struct to 0 to avoid valgrind complaining
|
933 | db1a4972 | Paolo Bonzini | * about uninitialized data in timer_create call
|
934 | db1a4972 | Paolo Bonzini | */
|
935 | db1a4972 | Paolo Bonzini | memset(&ev, 0, sizeof(ev)); |
936 | db1a4972 | Paolo Bonzini | ev.sigev_value.sival_int = 0;
|
937 | db1a4972 | Paolo Bonzini | ev.sigev_notify = SIGEV_SIGNAL; |
938 | db1a4972 | Paolo Bonzini | ev.sigev_signo = SIGALRM; |
939 | db1a4972 | Paolo Bonzini | |
940 | db1a4972 | Paolo Bonzini | if (timer_create(CLOCK_REALTIME, &ev, &host_timer)) {
|
941 | db1a4972 | Paolo Bonzini | perror("timer_create");
|
942 | db1a4972 | Paolo Bonzini | |
943 | db1a4972 | Paolo Bonzini | /* disable dynticks */
|
944 | db1a4972 | Paolo Bonzini | fprintf(stderr, "Dynamic Ticks disabled\n");
|
945 | db1a4972 | Paolo Bonzini | |
946 | db1a4972 | Paolo Bonzini | return -1; |
947 | db1a4972 | Paolo Bonzini | } |
948 | db1a4972 | Paolo Bonzini | |
949 | db1a4972 | Paolo Bonzini | t->priv = (void *)(long)host_timer; |
950 | db1a4972 | Paolo Bonzini | |
951 | db1a4972 | Paolo Bonzini | return 0; |
952 | db1a4972 | Paolo Bonzini | } |
953 | db1a4972 | Paolo Bonzini | |
954 | db1a4972 | Paolo Bonzini | static void dynticks_stop_timer(struct qemu_alarm_timer *t) |
955 | db1a4972 | Paolo Bonzini | { |
956 | db1a4972 | Paolo Bonzini | timer_t host_timer = (timer_t)(long)t->priv;
|
957 | db1a4972 | Paolo Bonzini | |
958 | db1a4972 | Paolo Bonzini | timer_delete(host_timer); |
959 | db1a4972 | Paolo Bonzini | } |
960 | db1a4972 | Paolo Bonzini | |
961 | db1a4972 | Paolo Bonzini | static void dynticks_rearm_timer(struct qemu_alarm_timer *t) |
962 | db1a4972 | Paolo Bonzini | { |
963 | db1a4972 | Paolo Bonzini | timer_t host_timer = (timer_t)(long)t->priv;
|
964 | db1a4972 | Paolo Bonzini | struct itimerspec timeout;
|
965 | db1a4972 | Paolo Bonzini | int64_t nearest_delta_us = INT64_MAX; |
966 | db1a4972 | Paolo Bonzini | int64_t current_us; |
967 | db1a4972 | Paolo Bonzini | |
968 | db1a4972 | Paolo Bonzini | assert(alarm_has_dynticks(t)); |
969 | db1a4972 | Paolo Bonzini | if (!active_timers[QEMU_CLOCK_REALTIME] &&
|
970 | db1a4972 | Paolo Bonzini | !active_timers[QEMU_CLOCK_VIRTUAL] && |
971 | db1a4972 | Paolo Bonzini | !active_timers[QEMU_CLOCK_HOST]) |
972 | db1a4972 | Paolo Bonzini | return;
|
973 | db1a4972 | Paolo Bonzini | |
974 | db1a4972 | Paolo Bonzini | nearest_delta_us = qemu_next_deadline_dyntick(); |
975 | db1a4972 | Paolo Bonzini | |
976 | db1a4972 | Paolo Bonzini | /* check whether a timer is already running */
|
977 | db1a4972 | Paolo Bonzini | if (timer_gettime(host_timer, &timeout)) {
|
978 | db1a4972 | Paolo Bonzini | perror("gettime");
|
979 | db1a4972 | Paolo Bonzini | fprintf(stderr, "Internal timer error: aborting\n");
|
980 | db1a4972 | Paolo Bonzini | exit(1);
|
981 | db1a4972 | Paolo Bonzini | } |
982 | db1a4972 | Paolo Bonzini | current_us = timeout.it_value.tv_sec * 1000000 + timeout.it_value.tv_nsec/1000; |
983 | db1a4972 | Paolo Bonzini | if (current_us && current_us <= nearest_delta_us)
|
984 | db1a4972 | Paolo Bonzini | return;
|
985 | db1a4972 | Paolo Bonzini | |
986 | db1a4972 | Paolo Bonzini | timeout.it_interval.tv_sec = 0;
|
987 | db1a4972 | Paolo Bonzini | timeout.it_interval.tv_nsec = 0; /* 0 for one-shot timer */ |
988 | db1a4972 | Paolo Bonzini | timeout.it_value.tv_sec = nearest_delta_us / 1000000;
|
989 | db1a4972 | Paolo Bonzini | timeout.it_value.tv_nsec = (nearest_delta_us % 1000000) * 1000; |
990 | db1a4972 | Paolo Bonzini | if (timer_settime(host_timer, 0 /* RELATIVE */, &timeout, NULL)) { |
991 | db1a4972 | Paolo Bonzini | perror("settime");
|
992 | db1a4972 | Paolo Bonzini | fprintf(stderr, "Internal timer error: aborting\n");
|
993 | db1a4972 | Paolo Bonzini | exit(1);
|
994 | db1a4972 | Paolo Bonzini | } |
995 | db1a4972 | Paolo Bonzini | } |
996 | db1a4972 | Paolo Bonzini | |
997 | db1a4972 | Paolo Bonzini | #endif /* defined(__linux__) */ |
998 | db1a4972 | Paolo Bonzini | |
999 | db1a4972 | Paolo Bonzini | static int unix_start_timer(struct qemu_alarm_timer *t) |
1000 | db1a4972 | Paolo Bonzini | { |
1001 | db1a4972 | Paolo Bonzini | struct sigaction act;
|
1002 | db1a4972 | Paolo Bonzini | struct itimerval itv;
|
1003 | db1a4972 | Paolo Bonzini | int err;
|
1004 | db1a4972 | Paolo Bonzini | |
1005 | db1a4972 | Paolo Bonzini | /* timer signal */
|
1006 | db1a4972 | Paolo Bonzini | sigfillset(&act.sa_mask); |
1007 | db1a4972 | Paolo Bonzini | act.sa_flags = 0;
|
1008 | db1a4972 | Paolo Bonzini | act.sa_handler = host_alarm_handler; |
1009 | db1a4972 | Paolo Bonzini | |
1010 | db1a4972 | Paolo Bonzini | sigaction(SIGALRM, &act, NULL);
|
1011 | db1a4972 | Paolo Bonzini | |
1012 | db1a4972 | Paolo Bonzini | itv.it_interval.tv_sec = 0;
|
1013 | db1a4972 | Paolo Bonzini | /* for i386 kernel 2.6 to get 1 ms */
|
1014 | db1a4972 | Paolo Bonzini | itv.it_interval.tv_usec = 999;
|
1015 | db1a4972 | Paolo Bonzini | itv.it_value.tv_sec = 0;
|
1016 | db1a4972 | Paolo Bonzini | itv.it_value.tv_usec = 10 * 1000; |
1017 | db1a4972 | Paolo Bonzini | |
1018 | db1a4972 | Paolo Bonzini | err = setitimer(ITIMER_REAL, &itv, NULL);
|
1019 | db1a4972 | Paolo Bonzini | if (err)
|
1020 | db1a4972 | Paolo Bonzini | return -1; |
1021 | db1a4972 | Paolo Bonzini | |
1022 | db1a4972 | Paolo Bonzini | return 0; |
1023 | db1a4972 | Paolo Bonzini | } |
1024 | db1a4972 | Paolo Bonzini | |
1025 | db1a4972 | Paolo Bonzini | static void unix_stop_timer(struct qemu_alarm_timer *t) |
1026 | db1a4972 | Paolo Bonzini | { |
1027 | db1a4972 | Paolo Bonzini | struct itimerval itv;
|
1028 | db1a4972 | Paolo Bonzini | |
1029 | db1a4972 | Paolo Bonzini | memset(&itv, 0, sizeof(itv)); |
1030 | db1a4972 | Paolo Bonzini | setitimer(ITIMER_REAL, &itv, NULL);
|
1031 | db1a4972 | Paolo Bonzini | } |
1032 | db1a4972 | Paolo Bonzini | |
1033 | db1a4972 | Paolo Bonzini | #endif /* !defined(_WIN32) */ |
1034 | db1a4972 | Paolo Bonzini | |
1035 | db1a4972 | Paolo Bonzini | |
1036 | db1a4972 | Paolo Bonzini | #ifdef _WIN32
|
1037 | db1a4972 | Paolo Bonzini | |
1038 | db1a4972 | Paolo Bonzini | static int win32_start_timer(struct qemu_alarm_timer *t) |
1039 | db1a4972 | Paolo Bonzini | { |
1040 | db1a4972 | Paolo Bonzini | TIMECAPS tc; |
1041 | db1a4972 | Paolo Bonzini | struct qemu_alarm_win32 *data = t->priv;
|
1042 | db1a4972 | Paolo Bonzini | UINT flags; |
1043 | db1a4972 | Paolo Bonzini | |
1044 | db1a4972 | Paolo Bonzini | memset(&tc, 0, sizeof(tc)); |
1045 | db1a4972 | Paolo Bonzini | timeGetDevCaps(&tc, sizeof(tc));
|
1046 | db1a4972 | Paolo Bonzini | |
1047 | db1a4972 | Paolo Bonzini | data->period = tc.wPeriodMin; |
1048 | db1a4972 | Paolo Bonzini | timeBeginPeriod(data->period); |
1049 | db1a4972 | Paolo Bonzini | |
1050 | db1a4972 | Paolo Bonzini | flags = TIME_CALLBACK_FUNCTION; |
1051 | db1a4972 | Paolo Bonzini | if (alarm_has_dynticks(t))
|
1052 | db1a4972 | Paolo Bonzini | flags |= TIME_ONESHOT; |
1053 | db1a4972 | Paolo Bonzini | else
|
1054 | db1a4972 | Paolo Bonzini | flags |= TIME_PERIODIC; |
1055 | db1a4972 | Paolo Bonzini | |
1056 | db1a4972 | Paolo Bonzini | data->timerId = timeSetEvent(1, // interval (ms) |
1057 | db1a4972 | Paolo Bonzini | data->period, // resolution
|
1058 | db1a4972 | Paolo Bonzini | host_alarm_handler, // function
|
1059 | db1a4972 | Paolo Bonzini | (DWORD)t, // parameter
|
1060 | db1a4972 | Paolo Bonzini | flags); |
1061 | db1a4972 | Paolo Bonzini | |
1062 | db1a4972 | Paolo Bonzini | if (!data->timerId) {
|
1063 | db1a4972 | Paolo Bonzini | fprintf(stderr, "Failed to initialize win32 alarm timer: %ld\n",
|
1064 | db1a4972 | Paolo Bonzini | GetLastError()); |
1065 | db1a4972 | Paolo Bonzini | timeEndPeriod(data->period); |
1066 | db1a4972 | Paolo Bonzini | return -1; |
1067 | db1a4972 | Paolo Bonzini | } |
1068 | db1a4972 | Paolo Bonzini | |
1069 | db1a4972 | Paolo Bonzini | return 0; |
1070 | db1a4972 | Paolo Bonzini | } |
1071 | db1a4972 | Paolo Bonzini | |
1072 | db1a4972 | Paolo Bonzini | static void win32_stop_timer(struct qemu_alarm_timer *t) |
1073 | db1a4972 | Paolo Bonzini | { |
1074 | db1a4972 | Paolo Bonzini | struct qemu_alarm_win32 *data = t->priv;
|
1075 | db1a4972 | Paolo Bonzini | |
1076 | db1a4972 | Paolo Bonzini | timeKillEvent(data->timerId); |
1077 | db1a4972 | Paolo Bonzini | timeEndPeriod(data->period); |
1078 | db1a4972 | Paolo Bonzini | } |
1079 | db1a4972 | Paolo Bonzini | |
1080 | db1a4972 | Paolo Bonzini | static void win32_rearm_timer(struct qemu_alarm_timer *t) |
1081 | db1a4972 | Paolo Bonzini | { |
1082 | db1a4972 | Paolo Bonzini | struct qemu_alarm_win32 *data = t->priv;
|
1083 | db1a4972 | Paolo Bonzini | |
1084 | db1a4972 | Paolo Bonzini | assert(alarm_has_dynticks(t)); |
1085 | db1a4972 | Paolo Bonzini | if (!active_timers[QEMU_CLOCK_REALTIME] &&
|
1086 | db1a4972 | Paolo Bonzini | !active_timers[QEMU_CLOCK_VIRTUAL] && |
1087 | db1a4972 | Paolo Bonzini | !active_timers[QEMU_CLOCK_HOST]) |
1088 | db1a4972 | Paolo Bonzini | return;
|
1089 | db1a4972 | Paolo Bonzini | |
1090 | db1a4972 | Paolo Bonzini | timeKillEvent(data->timerId); |
1091 | db1a4972 | Paolo Bonzini | |
1092 | db1a4972 | Paolo Bonzini | data->timerId = timeSetEvent(1,
|
1093 | db1a4972 | Paolo Bonzini | data->period, |
1094 | db1a4972 | Paolo Bonzini | host_alarm_handler, |
1095 | db1a4972 | Paolo Bonzini | (DWORD)t, |
1096 | db1a4972 | Paolo Bonzini | TIME_ONESHOT | TIME_CALLBACK_FUNCTION); |
1097 | db1a4972 | Paolo Bonzini | |
1098 | db1a4972 | Paolo Bonzini | if (!data->timerId) {
|
1099 | db1a4972 | Paolo Bonzini | fprintf(stderr, "Failed to re-arm win32 alarm timer %ld\n",
|
1100 | db1a4972 | Paolo Bonzini | GetLastError()); |
1101 | db1a4972 | Paolo Bonzini | |
1102 | db1a4972 | Paolo Bonzini | timeEndPeriod(data->period); |
1103 | db1a4972 | Paolo Bonzini | exit(1);
|
1104 | db1a4972 | Paolo Bonzini | } |
1105 | db1a4972 | Paolo Bonzini | } |
1106 | db1a4972 | Paolo Bonzini | |
1107 | db1a4972 | Paolo Bonzini | #endif /* _WIN32 */ |
1108 | db1a4972 | Paolo Bonzini | |
1109 | db1a4972 | Paolo Bonzini | static void alarm_timer_on_change_state_rearm(void *opaque, int running, int reason) |
1110 | db1a4972 | Paolo Bonzini | { |
1111 | db1a4972 | Paolo Bonzini | if (running)
|
1112 | db1a4972 | Paolo Bonzini | qemu_rearm_alarm_timer((struct qemu_alarm_timer *) opaque);
|
1113 | db1a4972 | Paolo Bonzini | } |
1114 | db1a4972 | Paolo Bonzini | |
1115 | db1a4972 | Paolo Bonzini | int init_timer_alarm(void) |
1116 | db1a4972 | Paolo Bonzini | { |
1117 | db1a4972 | Paolo Bonzini | struct qemu_alarm_timer *t = NULL; |
1118 | db1a4972 | Paolo Bonzini | int i, err = -1; |
1119 | db1a4972 | Paolo Bonzini | |
1120 | db1a4972 | Paolo Bonzini | for (i = 0; alarm_timers[i].name; i++) { |
1121 | db1a4972 | Paolo Bonzini | t = &alarm_timers[i]; |
1122 | db1a4972 | Paolo Bonzini | |
1123 | db1a4972 | Paolo Bonzini | err = t->start(t); |
1124 | db1a4972 | Paolo Bonzini | if (!err)
|
1125 | db1a4972 | Paolo Bonzini | break;
|
1126 | db1a4972 | Paolo Bonzini | } |
1127 | db1a4972 | Paolo Bonzini | |
1128 | db1a4972 | Paolo Bonzini | if (err) {
|
1129 | db1a4972 | Paolo Bonzini | err = -ENOENT; |
1130 | db1a4972 | Paolo Bonzini | goto fail;
|
1131 | db1a4972 | Paolo Bonzini | } |
1132 | db1a4972 | Paolo Bonzini | |
1133 | db1a4972 | Paolo Bonzini | /* first event is at time 0 */
|
1134 | db1a4972 | Paolo Bonzini | t->pending = 1;
|
1135 | db1a4972 | Paolo Bonzini | alarm_timer = t; |
1136 | db1a4972 | Paolo Bonzini | qemu_add_vm_change_state_handler(alarm_timer_on_change_state_rearm, t); |
1137 | db1a4972 | Paolo Bonzini | |
1138 | db1a4972 | Paolo Bonzini | return 0; |
1139 | db1a4972 | Paolo Bonzini | |
1140 | db1a4972 | Paolo Bonzini | fail:
|
1141 | db1a4972 | Paolo Bonzini | return err;
|
1142 | db1a4972 | Paolo Bonzini | } |
1143 | db1a4972 | Paolo Bonzini | |
1144 | db1a4972 | Paolo Bonzini | void quit_timers(void) |
1145 | db1a4972 | Paolo Bonzini | { |
1146 | db1a4972 | Paolo Bonzini | struct qemu_alarm_timer *t = alarm_timer;
|
1147 | db1a4972 | Paolo Bonzini | alarm_timer = NULL;
|
1148 | db1a4972 | Paolo Bonzini | t->stop(t); |
1149 | db1a4972 | Paolo Bonzini | } |
1150 | db1a4972 | Paolo Bonzini | |
1151 | db1a4972 | Paolo Bonzini | int qemu_calculate_timeout(void) |
1152 | db1a4972 | Paolo Bonzini | { |
1153 | db1a4972 | Paolo Bonzini | #ifndef CONFIG_IOTHREAD
|
1154 | db1a4972 | Paolo Bonzini | int timeout;
|
1155 | db1a4972 | Paolo Bonzini | |
1156 | db1a4972 | Paolo Bonzini | if (!vm_running)
|
1157 | db1a4972 | Paolo Bonzini | timeout = 5000;
|
1158 | db1a4972 | Paolo Bonzini | else {
|
1159 | db1a4972 | Paolo Bonzini | /* XXX: use timeout computed from timers */
|
1160 | db1a4972 | Paolo Bonzini | int64_t add; |
1161 | db1a4972 | Paolo Bonzini | int64_t delta; |
1162 | db1a4972 | Paolo Bonzini | /* Advance virtual time to the next event. */
|
1163 | db1a4972 | Paolo Bonzini | delta = qemu_icount_delta(); |
1164 | db1a4972 | Paolo Bonzini | if (delta > 0) { |
1165 | db1a4972 | Paolo Bonzini | /* If virtual time is ahead of real time then just
|
1166 | db1a4972 | Paolo Bonzini | wait for IO. */
|
1167 | db1a4972 | Paolo Bonzini | timeout = (delta + 999999) / 1000000; |
1168 | db1a4972 | Paolo Bonzini | } else {
|
1169 | db1a4972 | Paolo Bonzini | /* Wait for either IO to occur or the next
|
1170 | db1a4972 | Paolo Bonzini | timer event. */
|
1171 | db1a4972 | Paolo Bonzini | add = qemu_next_deadline(); |
1172 | db1a4972 | Paolo Bonzini | /* We advance the timer before checking for IO.
|
1173 | db1a4972 | Paolo Bonzini | Limit the amount we advance so that early IO
|
1174 | db1a4972 | Paolo Bonzini | activity won't get the guest too far ahead. */
|
1175 | db1a4972 | Paolo Bonzini | if (add > 10000000) |
1176 | db1a4972 | Paolo Bonzini | add = 10000000;
|
1177 | db1a4972 | Paolo Bonzini | delta += add; |
1178 | db1a4972 | Paolo Bonzini | qemu_icount += qemu_icount_round (add); |
1179 | db1a4972 | Paolo Bonzini | timeout = delta / 1000000;
|
1180 | db1a4972 | Paolo Bonzini | if (timeout < 0) |
1181 | db1a4972 | Paolo Bonzini | timeout = 0;
|
1182 | db1a4972 | Paolo Bonzini | } |
1183 | db1a4972 | Paolo Bonzini | } |
1184 | db1a4972 | Paolo Bonzini | |
1185 | db1a4972 | Paolo Bonzini | return timeout;
|
1186 | db1a4972 | Paolo Bonzini | #else /* CONFIG_IOTHREAD */ |
1187 | db1a4972 | Paolo Bonzini | return 1000; |
1188 | db1a4972 | Paolo Bonzini | #endif
|
1189 | db1a4972 | Paolo Bonzini | } |