1 | /****************************************************************************** |
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2 | * keyhandler.c |
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3 | */ |
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4 | |
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5 | #include <asm/regs.h> |
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6 | #include <xen/keyhandler.h> |
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7 | #include <xen/shutdown.h> |
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8 | #include <xen/event.h> |
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9 | #include <xen/console.h> |
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10 | #include <xen/serial.h> |
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11 | #include <xen/sched.h> |
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12 | #include <xen/softirq.h> |
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13 | #include <xen/domain.h> |
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14 | #include <xen/rangeset.h> |
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15 | #include <xen/compat.h> |
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16 | #include <asm/debugger.h> |
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17 | #include <asm/shadow.h> |
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18 | #include <asm/div64.h> |
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19 | |
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20 | #define KEY_MAX 256 |
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21 | #define STR_MAX 64 |
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22 | |
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23 | static struct { |
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24 | union { |
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25 | keyhandler_t *handler; |
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26 | irq_keyhandler_t *irq_handler; |
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27 | } u; |
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28 | unsigned int flags; |
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29 | char desc[STR_MAX]; |
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30 | } key_table[KEY_MAX]; |
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31 | |
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32 | #define KEYHANDLER_IRQ_CALLBACK 0x1 |
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33 | |
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34 | static unsigned char keypress_key; |
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35 | |
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36 | static void keypress_softirq(void) |
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37 | { |
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38 | keyhandler_t *h; |
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39 | unsigned char key = keypress_key; |
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40 | console_start_log_everything(); |
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41 | if ( (h = key_table[key].u.handler) != NULL ) |
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42 | (*h)(key); |
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43 | console_end_log_everything(); |
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44 | } |
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45 | |
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46 | void handle_keypress(unsigned char key, struct cpu_user_regs *regs) |
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47 | { |
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48 | irq_keyhandler_t *h; |
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49 | |
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50 | if ( !in_irq() || (key_table[key].flags & KEYHANDLER_IRQ_CALLBACK) ) |
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51 | { |
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52 | console_start_log_everything(); |
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53 | if ( (h = key_table[key].u.irq_handler) != NULL ) |
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54 | (*h)(key, regs); |
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55 | console_end_log_everything(); |
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56 | } |
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57 | else |
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58 | { |
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59 | keypress_key = key; |
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60 | raise_softirq(KEYPRESS_SOFTIRQ); |
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61 | } |
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62 | } |
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63 | |
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64 | void register_keyhandler( |
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65 | unsigned char key, keyhandler_t *handler, char *desc) |
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66 | { |
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67 | ASSERT(key_table[key].u.handler == NULL); |
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68 | key_table[key].u.handler = handler; |
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69 | key_table[key].flags = 0; |
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70 | safe_strcpy(key_table[key].desc, desc); |
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71 | } |
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72 | |
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73 | void register_irq_keyhandler( |
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74 | unsigned char key, irq_keyhandler_t *handler, char *desc) |
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75 | { |
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76 | ASSERT(key_table[key].u.irq_handler == NULL); |
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77 | key_table[key].u.irq_handler = handler; |
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78 | key_table[key].flags = KEYHANDLER_IRQ_CALLBACK; |
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79 | safe_strcpy(key_table[key].desc, desc); |
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80 | } |
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81 | |
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82 | static void show_handlers(unsigned char key) |
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83 | { |
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84 | int i; |
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85 | printk("'%c' pressed -> showing installed handlers\n", key); |
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86 | for ( i = 0; i < KEY_MAX; i++ ) |
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87 | if ( key_table[i].u.handler != NULL ) |
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88 | printk(" key '%c' (ascii '%02x') => %s\n", |
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89 | (i<33 || i>126)?(' '):(i),i, |
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90 | key_table[i].desc); |
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91 | } |
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92 | |
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93 | static void __dump_execstate(void *unused) |
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94 | { |
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95 | dump_execution_state(); |
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96 | printk("*** Dumping CPU%d guest state: ***\n", smp_processor_id()); |
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97 | if ( is_idle_vcpu(current) ) |
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98 | printk("No guest context (CPU is idle).\n"); |
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99 | else |
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100 | show_execution_state(guest_cpu_user_regs()); |
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101 | } |
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102 | |
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103 | static void dump_registers(unsigned char key, struct cpu_user_regs *regs) |
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104 | { |
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105 | unsigned int cpu; |
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106 | |
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107 | printk("'%c' pressed -> dumping registers\n", key); |
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108 | |
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109 | /* Get local execution state out immediately, in case we get stuck. */ |
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110 | printk("\n*** Dumping CPU%d host state: ***\n", smp_processor_id()); |
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111 | __dump_execstate(NULL); |
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112 | |
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113 | for_each_online_cpu ( cpu ) |
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114 | { |
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115 | if ( cpu == smp_processor_id() ) |
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116 | continue; |
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117 | printk("\n*** Dumping CPU%d host state: ***\n", cpu); |
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118 | on_selected_cpus(cpumask_of_cpu(cpu), __dump_execstate, NULL, 1, 1); |
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119 | } |
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120 | |
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121 | printk("\n"); |
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122 | } |
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123 | |
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124 | static void halt_machine(unsigned char key, struct cpu_user_regs *regs) |
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125 | { |
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126 | printk("'%c' pressed -> rebooting machine\n", key); |
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127 | machine_restart(NULL); |
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128 | } |
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129 | |
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130 | static void cpuset_print(char *set, int size, cpumask_t mask) |
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131 | { |
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132 | *set++ = '{'; |
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133 | set += cpulist_scnprintf(set, size-2, mask); |
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134 | *set++ = '}'; |
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135 | *set++ = '\0'; |
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136 | } |
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137 | |
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138 | static void periodic_timer_print(char *str, int size, uint64_t period) |
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139 | { |
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140 | if ( period == 0 ) |
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141 | { |
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142 | strlcpy(str, "No periodic timer", size); |
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143 | return; |
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144 | } |
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145 | |
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146 | snprintf(str, size, |
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147 | "%u Hz periodic timer (period %u ms)", |
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148 | 1000000000/(int)period, (int)period/1000000); |
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149 | } |
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150 | |
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151 | static void dump_domains(unsigned char key) |
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152 | { |
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153 | struct domain *d; |
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154 | struct vcpu *v; |
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155 | s_time_t now = NOW(); |
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156 | char tmpstr[100]; |
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157 | |
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158 | printk("'%c' pressed -> dumping domain info (now=0x%X:%08X)\n", key, |
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159 | (u32)(now>>32), (u32)now); |
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160 | |
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161 | rcu_read_lock(&domlist_read_lock); |
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162 | |
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163 | for_each_domain ( d ) |
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164 | { |
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165 | printk("General information for domain %u:\n", d->domain_id); |
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166 | cpuset_print(tmpstr, sizeof(tmpstr), d->domain_dirty_cpumask); |
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167 | printk(" refcnt=%d nr_pages=%d xenheap_pages=%d " |
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168 | "dirty_cpus=%s\n", |
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169 | atomic_read(&d->refcnt), |
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170 | d->tot_pages, d->xenheap_pages, tmpstr); |
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171 | printk(" handle=%02x%02x%02x%02x-%02x%02x-%02x%02x-" |
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172 | "%02x%02x-%02x%02x%02x%02x%02x%02x vm_assist=%08lx\n", |
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173 | d->handle[ 0], d->handle[ 1], d->handle[ 2], d->handle[ 3], |
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174 | d->handle[ 4], d->handle[ 5], d->handle[ 6], d->handle[ 7], |
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175 | d->handle[ 8], d->handle[ 9], d->handle[10], d->handle[11], |
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176 | d->handle[12], d->handle[13], d->handle[14], d->handle[15], |
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177 | d->vm_assist); |
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178 | |
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179 | arch_dump_domain_info(d); |
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180 | |
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181 | rangeset_domain_printk(d); |
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182 | |
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183 | dump_pageframe_info(d); |
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184 | |
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185 | printk("VCPU information and callbacks for domain %u:\n", |
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186 | d->domain_id); |
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187 | for_each_vcpu ( d, v ) { |
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188 | printk(" VCPU%d: CPU%d [has=%c] flags=%lx " |
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189 | "upcall_pend = %02x, upcall_mask = %02x ", |
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190 | v->vcpu_id, v->processor, |
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191 | v->is_running ? 'T':'F', |
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192 | v->pause_flags, |
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193 | vcpu_info(v, evtchn_upcall_pending), |
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194 | vcpu_info(v, evtchn_upcall_mask)); |
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195 | cpuset_print(tmpstr, sizeof(tmpstr), v->vcpu_dirty_cpumask); |
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196 | printk("dirty_cpus=%s ", tmpstr); |
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197 | cpuset_print(tmpstr, sizeof(tmpstr), v->cpu_affinity); |
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198 | printk("cpu_affinity=%s\n", tmpstr); |
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199 | arch_dump_vcpu_info(v); |
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200 | periodic_timer_print(tmpstr, sizeof(tmpstr), v->periodic_period); |
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201 | printk(" %s\n", tmpstr); |
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202 | printk(" Notifying guest (virq %d, port %d, stat %d/%d/%d)\n", |
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203 | VIRQ_DEBUG, v->virq_to_evtchn[VIRQ_DEBUG], |
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204 | test_bit(v->virq_to_evtchn[VIRQ_DEBUG], |
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205 | shared_info_addr(d, evtchn_pending)), |
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206 | test_bit(v->virq_to_evtchn[VIRQ_DEBUG], |
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207 | shared_info_addr(d, evtchn_mask)), |
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208 | test_bit(v->virq_to_evtchn[VIRQ_DEBUG] / |
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209 | BITS_PER_GUEST_LONG(d), |
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210 | vcpu_info_addr(v, evtchn_pending_sel))); |
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211 | send_guest_vcpu_virq(v, VIRQ_DEBUG); |
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212 | } |
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213 | } |
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214 | |
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215 | rcu_read_unlock(&domlist_read_lock); |
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216 | } |
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217 | |
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218 | static cpumask_t read_clocks_cpumask = CPU_MASK_NONE; |
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219 | static s_time_t read_clocks_time[NR_CPUS]; |
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220 | |
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221 | static void read_clocks_slave(void *unused) |
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222 | { |
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223 | unsigned int cpu = smp_processor_id(); |
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224 | while ( !cpu_isset(cpu, read_clocks_cpumask) ) |
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225 | cpu_relax(); |
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226 | read_clocks_time[cpu] = NOW(); |
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227 | cpu_clear(cpu, read_clocks_cpumask); |
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228 | } |
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229 | |
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230 | static void read_clocks(unsigned char key) |
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231 | { |
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232 | unsigned int cpu = smp_processor_id(), min_cpu, max_cpu; |
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233 | u64 min, max, dif, difus; |
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234 | static DEFINE_SPINLOCK(lock); |
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235 | |
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236 | spin_lock(&lock); |
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237 | |
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238 | smp_call_function(read_clocks_slave, NULL, 0, 0); |
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239 | |
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240 | local_irq_disable(); |
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241 | read_clocks_cpumask = cpu_online_map; |
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242 | read_clocks_time[cpu] = NOW(); |
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243 | cpu_clear(cpu, read_clocks_cpumask); |
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244 | local_irq_enable(); |
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245 | |
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246 | while ( !cpus_empty(read_clocks_cpumask) ) |
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247 | cpu_relax(); |
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248 | |
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249 | min_cpu = max_cpu = cpu; |
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250 | for_each_online_cpu ( cpu ) |
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251 | { |
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252 | if ( read_clocks_time[cpu] < read_clocks_time[min_cpu] ) |
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253 | min_cpu = cpu; |
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254 | if ( read_clocks_time[cpu] > read_clocks_time[max_cpu] ) |
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255 | max_cpu = cpu; |
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256 | } |
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257 | |
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258 | min = read_clocks_time[min_cpu]; |
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259 | max = read_clocks_time[max_cpu]; |
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260 | |
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261 | spin_unlock(&lock); |
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262 | |
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263 | dif = difus = max - min; |
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264 | do_div(difus, 1000); |
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265 | printk("Min = %"PRIu64" ; Max = %"PRIu64" ; Diff = %"PRIu64 |
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266 | " (%"PRIu64" microseconds)\n", |
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267 | min, max, dif, difus); |
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268 | } |
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269 | |
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270 | extern void dump_runq(unsigned char key); |
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271 | |
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272 | #ifdef PERF_COUNTERS |
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273 | extern void perfc_printall(unsigned char key); |
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274 | extern void perfc_reset(unsigned char key); |
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275 | #endif |
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276 | |
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277 | static void do_debug_key(unsigned char key, struct cpu_user_regs *regs) |
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278 | { |
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279 | (void)debugger_trap_fatal(0xf001, regs); |
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280 | nop(); /* Prevent the compiler doing tail call |
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281 | optimisation, as that confuses xendbg a |
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282 | bit. */ |
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283 | } |
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284 | |
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285 | void initialize_keytable(void) |
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286 | { |
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287 | open_softirq(KEYPRESS_SOFTIRQ, keypress_softirq); |
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288 | |
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289 | register_irq_keyhandler( |
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290 | 'd', dump_registers, "dump registers"); |
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291 | register_keyhandler( |
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292 | 'h', show_handlers, "show this message"); |
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293 | register_keyhandler( |
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294 | 'q', dump_domains, "dump domain (and guest debug) info"); |
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295 | register_keyhandler( |
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296 | 'r', dump_runq, "dump run queues"); |
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297 | register_irq_keyhandler( |
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298 | 'R', halt_machine, "reboot machine"); |
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299 | |
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300 | register_keyhandler( |
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301 | 't', read_clocks, "display multi-cpu clock info"); |
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302 | |
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303 | #ifdef PERF_COUNTERS |
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304 | register_keyhandler( |
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305 | 'p', perfc_printall, "print performance counters"); |
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306 | register_keyhandler( |
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307 | 'P', perfc_reset, "reset performance counters"); |
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308 | #endif |
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309 | |
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310 | register_irq_keyhandler('%', do_debug_key, "Trap to xendbg"); |
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311 | } |
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312 | |
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313 | /* |
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314 | * Local variables: |
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315 | * mode: C |
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316 | * c-set-style: "BSD" |
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317 | * c-basic-offset: 4 |
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318 | * tab-width: 4 |
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319 | * indent-tabs-mode: nil |
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320 | * End: |
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321 | */ |
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