Revision 05330448
b/kvm-all.c | ||
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1 |
/* |
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2 |
* QEMU KVM support |
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3 |
* |
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4 |
* Copyright IBM, Corp. 2008 |
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5 |
* |
|
6 |
* Authors: |
|
7 |
* Anthony Liguori <aliguori@us.ibm.com> |
|
8 |
* |
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9 |
* This work is licensed under the terms of the GNU GPL, version 2 or later. |
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10 |
* See the COPYING file in the top-level directory. |
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11 |
* |
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12 |
*/ |
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13 |
|
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14 |
#include <sys/types.h> |
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15 |
#include <sys/ioctl.h> |
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16 |
#include <sys/mman.h> |
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17 |
|
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18 |
#include <linux/kvm.h> |
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19 |
|
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20 |
#include "qemu-common.h" |
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21 |
#include "sysemu.h" |
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22 |
#include "kvm.h" |
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23 |
|
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//#define DEBUG_KVM |
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25 |
|
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#ifdef DEBUG_KVM |
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#define dprintf(fmt, ...) \ |
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do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) |
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#else |
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30 |
#define dprintf(fmt, ...) \ |
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do { } while (0) |
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#endif |
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33 |
|
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typedef struct kvm_userspace_memory_region KVMSlot; |
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35 |
|
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int kvm_allowed = 0; |
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|
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struct KVMState |
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{ |
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KVMSlot slots[32]; |
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int fd; |
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int vmfd; |
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}; |
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|
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static KVMState *kvm_state; |
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46 |
|
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static KVMSlot *kvm_alloc_slot(KVMState *s) |
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{ |
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int i; |
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50 |
|
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for (i = 0; i < ARRAY_SIZE(s->slots); i++) { |
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if (s->slots[i].memory_size == 0) |
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return &s->slots[i]; |
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} |
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|
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return NULL; |
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} |
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|
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static KVMSlot *kvm_lookup_slot(KVMState *s, target_phys_addr_t start_addr) |
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{ |
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int i; |
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|
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for (i = 0; i < ARRAY_SIZE(s->slots); i++) { |
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KVMSlot *mem = &s->slots[i]; |
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|
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if (start_addr >= mem->guest_phys_addr && |
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start_addr < (mem->guest_phys_addr + mem->memory_size)) |
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return mem; |
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} |
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70 |
|
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return NULL; |
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} |
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|
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int kvm_init_vcpu(CPUState *env) |
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{ |
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KVMState *s = kvm_state; |
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long mmap_size; |
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int ret; |
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79 |
|
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dprintf("kvm_init_vcpu\n"); |
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81 |
|
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ret = kvm_vm_ioctl(s, KVM_CREATE_VCPU, |
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(void *)(unsigned long)env->cpu_index); |
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if (ret < 0) { |
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dprintf("kvm_create_vcpu failed\n"); |
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goto err; |
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} |
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88 |
|
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env->kvm_fd = ret; |
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env->kvm_state = s; |
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91 |
|
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mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0); |
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if (mmap_size < 0) { |
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dprintf("KVM_GET_VCPU_MMAP_SIZE failed\n"); |
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goto err; |
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} |
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97 |
|
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env->kvm_run = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED, |
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env->kvm_fd, 0); |
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if (env->kvm_run == MAP_FAILED) { |
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ret = -errno; |
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102 |
dprintf("mmap'ing vcpu state failed\n"); |
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103 |
goto err; |
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104 |
} |
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105 |
|
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ret = kvm_arch_init_vcpu(env); |
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107 |
|
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err: |
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return ret; |
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110 |
} |
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111 |
|
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112 |
int kvm_init(int smp_cpus) |
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{ |
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114 |
KVMState *s; |
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115 |
int ret; |
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int i; |
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117 |
|
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118 |
if (smp_cpus > 1) |
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119 |
return -EINVAL; |
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120 |
|
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s = qemu_mallocz(sizeof(KVMState)); |
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122 |
if (s == NULL) |
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return -ENOMEM; |
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124 |
|
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125 |
for (i = 0; i < ARRAY_SIZE(s->slots); i++) |
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126 |
s->slots[i].slot = i; |
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127 |
|
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128 |
s->vmfd = -1; |
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129 |
s->fd = open("/dev/kvm", O_RDWR); |
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130 |
if (s->fd == -1) { |
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131 |
fprintf(stderr, "Could not access KVM kernel module: %m\n"); |
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ret = -errno; |
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133 |
goto err; |
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134 |
} |
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135 |
|
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136 |
ret = kvm_ioctl(s, KVM_GET_API_VERSION, 0); |
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137 |
if (ret < KVM_API_VERSION) { |
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138 |
if (ret > 0) |
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ret = -EINVAL; |
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140 |
fprintf(stderr, "kvm version too old\n"); |
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141 |
goto err; |
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142 |
} |
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143 |
|
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144 |
if (ret > KVM_API_VERSION) { |
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145 |
ret = -EINVAL; |
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146 |
fprintf(stderr, "kvm version not supported\n"); |
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147 |
goto err; |
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148 |
} |
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149 |
|
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150 |
s->vmfd = kvm_ioctl(s, KVM_CREATE_VM, 0); |
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151 |
if (s->vmfd < 0) |
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152 |
goto err; |
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153 |
|
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154 |
/* initially, KVM allocated its own memory and we had to jump through |
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155 |
* hooks to make phys_ram_base point to this. Modern versions of KVM |
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* just use a user allocated buffer so we can use phys_ram_base |
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157 |
* unmodified. Make sure we have a sufficiently modern version of KVM. |
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158 |
*/ |
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159 |
ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, (void *)KVM_CAP_USER_MEMORY); |
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160 |
if (ret <= 0) { |
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161 |
if (ret == 0) |
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162 |
ret = -EINVAL; |
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163 |
fprintf(stderr, "kvm does not support KVM_CAP_USER_MEMORY\n"); |
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164 |
goto err; |
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165 |
} |
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166 |
|
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ret = kvm_arch_init(s, smp_cpus); |
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168 |
if (ret < 0) |
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169 |
goto err; |
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170 |
|
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171 |
kvm_state = s; |
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172 |
|
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173 |
return 0; |
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174 |
|
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175 |
err: |
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176 |
if (s) { |
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177 |
if (s->vmfd != -1) |
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178 |
close(s->vmfd); |
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179 |
if (s->fd != -1) |
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180 |
close(s->fd); |
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181 |
} |
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182 |
qemu_free(s); |
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183 |
|
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184 |
return ret; |
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185 |
} |
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186 |
|
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187 |
static int kvm_handle_io(CPUState *env, uint16_t port, void *data, |
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188 |
int direction, int size, uint32_t count) |
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189 |
{ |
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190 |
int i; |
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191 |
uint8_t *ptr = data; |
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192 |
|
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193 |
for (i = 0; i < count; i++) { |
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194 |
if (direction == KVM_EXIT_IO_IN) { |
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195 |
switch (size) { |
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196 |
case 1: |
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197 |
stb_p(ptr, cpu_inb(env, port)); |
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198 |
break; |
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199 |
case 2: |
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200 |
stw_p(ptr, cpu_inw(env, port)); |
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201 |
break; |
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202 |
case 4: |
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203 |
stl_p(ptr, cpu_inl(env, port)); |
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204 |
break; |
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205 |
} |
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206 |
} else { |
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207 |
switch (size) { |
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208 |
case 1: |
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209 |
cpu_outb(env, port, ldub_p(ptr)); |
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210 |
break; |
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211 |
case 2: |
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212 |
cpu_outw(env, port, lduw_p(ptr)); |
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213 |
break; |
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214 |
case 4: |
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215 |
cpu_outl(env, port, ldl_p(ptr)); |
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216 |
break; |
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217 |
} |
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218 |
} |
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219 |
|
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220 |
ptr += size; |
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221 |
} |
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222 |
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223 |
return 1; |
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224 |
} |
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225 |
|
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226 |
int kvm_cpu_exec(CPUState *env) |
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227 |
{ |
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228 |
struct kvm_run *run = env->kvm_run; |
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229 |
int ret; |
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230 |
|
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231 |
dprintf("kvm_cpu_exec()\n"); |
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232 |
|
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233 |
do { |
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234 |
kvm_arch_pre_run(env, run); |
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235 |
|
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236 |
if ((env->interrupt_request & CPU_INTERRUPT_EXIT)) { |
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237 |
dprintf("interrupt exit requested\n"); |
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238 |
ret = 0; |
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239 |
break; |
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240 |
} |
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241 |
|
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242 |
ret = kvm_vcpu_ioctl(env, KVM_RUN, 0); |
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243 |
kvm_arch_post_run(env, run); |
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244 |
|
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245 |
if (ret == -EINTR || ret == -EAGAIN) { |
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246 |
dprintf("io window exit\n"); |
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247 |
ret = 0; |
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248 |
break; |
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249 |
} |
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250 |
|
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251 |
if (ret < 0) { |
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252 |
dprintf("kvm run failed %s\n", strerror(-ret)); |
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253 |
abort(); |
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254 |
} |
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255 |
|
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256 |
ret = 0; /* exit loop */ |
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257 |
switch (run->exit_reason) { |
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258 |
case KVM_EXIT_IO: |
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259 |
dprintf("handle_io\n"); |
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260 |
ret = kvm_handle_io(env, run->io.port, |
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261 |
(uint8_t *)run + run->io.data_offset, |
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262 |
run->io.direction, |
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263 |
run->io.size, |
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264 |
run->io.count); |
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265 |
break; |
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266 |
case KVM_EXIT_MMIO: |
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267 |
dprintf("handle_mmio\n"); |
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268 |
cpu_physical_memory_rw(run->mmio.phys_addr, |
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269 |
run->mmio.data, |
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270 |
run->mmio.len, |
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271 |
run->mmio.is_write); |
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272 |
ret = 1; |
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273 |
break; |
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274 |
case KVM_EXIT_IRQ_WINDOW_OPEN: |
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275 |
dprintf("irq_window_open\n"); |
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276 |
break; |
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277 |
case KVM_EXIT_SHUTDOWN: |
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278 |
dprintf("shutdown\n"); |
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279 |
qemu_system_reset_request(); |
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280 |
ret = 1; |
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281 |
break; |
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282 |
case KVM_EXIT_UNKNOWN: |
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283 |
dprintf("kvm_exit_unknown\n"); |
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284 |
break; |
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285 |
case KVM_EXIT_FAIL_ENTRY: |
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286 |
dprintf("kvm_exit_fail_entry\n"); |
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287 |
break; |
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288 |
case KVM_EXIT_EXCEPTION: |
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289 |
dprintf("kvm_exit_exception\n"); |
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290 |
break; |
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291 |
case KVM_EXIT_DEBUG: |
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292 |
dprintf("kvm_exit_debug\n"); |
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293 |
break; |
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294 |
default: |
|
295 |
dprintf("kvm_arch_handle_exit\n"); |
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296 |
ret = kvm_arch_handle_exit(env, run); |
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297 |
break; |
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298 |
} |
|
299 |
} while (ret > 0); |
|
300 |
|
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301 |
return ret; |
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302 |
} |
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303 |
|
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304 |
void kvm_set_phys_mem(target_phys_addr_t start_addr, |
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305 |
ram_addr_t size, |
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306 |
ram_addr_t phys_offset) |
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307 |
{ |
|
308 |
KVMState *s = kvm_state; |
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309 |
ram_addr_t flags = phys_offset & ~TARGET_PAGE_MASK; |
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310 |
KVMSlot *mem; |
|
311 |
|
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312 |
/* KVM does not support read-only slots */ |
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313 |
phys_offset &= ~IO_MEM_ROM; |
|
314 |
|
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315 |
mem = kvm_lookup_slot(s, start_addr); |
|
316 |
if (mem) { |
|
317 |
if (flags == IO_MEM_UNASSIGNED) { |
|
318 |
mem->memory_size = 0; |
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319 |
mem->guest_phys_addr = start_addr; |
|
320 |
mem->userspace_addr = 0; |
|
321 |
mem->flags = 0; |
|
322 |
|
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323 |
kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, mem); |
|
324 |
} else if (start_addr >= mem->guest_phys_addr && |
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325 |
(start_addr + size) <= (mem->guest_phys_addr + mem->memory_size)) |
|
326 |
return; |
|
327 |
} |
|
328 |
|
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329 |
/* KVM does not need to know about this memory */ |
|
330 |
if (flags >= IO_MEM_UNASSIGNED) |
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331 |
return; |
|
332 |
|
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333 |
mem = kvm_alloc_slot(s); |
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334 |
mem->memory_size = size; |
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335 |
mem->guest_phys_addr = start_addr; |
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336 |
mem->userspace_addr = (unsigned long)(phys_ram_base + phys_offset); |
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337 |
mem->flags = 0; |
|
338 |
|
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339 |
kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, mem); |
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340 |
/* FIXME deal with errors */ |
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341 |
} |
|
342 |
|
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343 |
int kvm_ioctl(KVMState *s, int type, void *data) |
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344 |
{ |
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345 |
int ret; |
|
346 |
|
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347 |
ret = ioctl(s->fd, type, data); |
|
348 |
if (ret == -1) |
|
349 |
ret = -errno; |
|
350 |
|
|
351 |
return ret; |
|
352 |
} |
|
353 |
|
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354 |
int kvm_vm_ioctl(KVMState *s, int type, void *data) |
|
355 |
{ |
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356 |
int ret; |
|
357 |
|
|
358 |
ret = ioctl(s->vmfd, type, data); |
|
359 |
if (ret == -1) |
|
360 |
ret = -errno; |
|
361 |
|
|
362 |
return ret; |
|
363 |
} |
|
364 |
|
|
365 |
int kvm_vcpu_ioctl(CPUState *env, int type, void *data) |
|
366 |
{ |
|
367 |
int ret; |
|
368 |
|
|
369 |
ret = ioctl(env->kvm_fd, type, data); |
|
370 |
if (ret == -1) |
|
371 |
ret = -errno; |
|
372 |
|
|
373 |
return ret; |
|
374 |
} |
b/kvm.h | ||
---|---|---|
1 |
/* |
|
2 |
* QEMU KVM support |
|
3 |
* |
|
4 |
* Copyright IBM, Corp. 2008 |
|
5 |
* |
|
6 |
* Authors: |
|
7 |
* Anthony Liguori <aliguori@us.ibm.com> |
|
8 |
* |
|
9 |
* This work is licensed under the terms of the GNU GPL, version 2 or later. |
|
10 |
* See the COPYING file in the top-level directory. |
|
11 |
* |
|
12 |
*/ |
|
13 |
|
|
14 |
#ifndef QEMU_KVM_H |
|
15 |
#define QEMU_KVM_H |
|
16 |
|
|
17 |
#include "config.h" |
|
18 |
|
|
19 |
#ifdef CONFIG_KVM |
|
20 |
extern int kvm_allowed; |
|
21 |
|
|
22 |
#define kvm_enabled() (kvm_allowed) |
|
23 |
#else |
|
24 |
#define kvm_enabled() (0) |
|
25 |
#endif |
|
26 |
|
|
27 |
struct kvm_run; |
|
28 |
|
|
29 |
/* external API */ |
|
30 |
|
|
31 |
int kvm_init(int smp_cpus); |
|
32 |
|
|
33 |
int kvm_init_vcpu(CPUState *env); |
|
34 |
|
|
35 |
int kvm_cpu_exec(CPUState *env); |
|
36 |
|
|
37 |
void kvm_set_phys_mem(target_phys_addr_t start_addr, |
|
38 |
ram_addr_t size, |
|
39 |
ram_addr_t phys_offset); |
|
40 |
|
|
41 |
/* internal API */ |
|
42 |
|
|
43 |
struct KVMState; |
|
44 |
typedef struct KVMState KVMState; |
|
45 |
|
|
46 |
int kvm_ioctl(KVMState *s, int type, void *data); |
|
47 |
|
|
48 |
int kvm_vm_ioctl(KVMState *s, int type, void *data); |
|
49 |
|
|
50 |
int kvm_vcpu_ioctl(CPUState *env, int type, void *data); |
|
51 |
|
|
52 |
/* Arch specific hooks */ |
|
53 |
|
|
54 |
int kvm_arch_post_run(CPUState *env, struct kvm_run *run); |
|
55 |
|
|
56 |
int kvm_arch_handle_exit(CPUState *env, struct kvm_run *run); |
|
57 |
|
|
58 |
int kvm_arch_pre_run(CPUState *env, struct kvm_run *run); |
|
59 |
|
|
60 |
int kvm_arch_get_registers(CPUState *env); |
|
61 |
|
|
62 |
int kvm_arch_put_registers(CPUState *env); |
|
63 |
|
|
64 |
int kvm_arch_init(KVMState *s, int smp_cpus); |
|
65 |
|
|
66 |
int kvm_arch_init_vcpu(CPUState *env); |
|
67 |
|
|
68 |
#endif |
b/target-i386/kvm.c | ||
---|---|---|
1 |
/* |
|
2 |
* QEMU KVM support |
|
3 |
* |
|
4 |
* Copyright (C) 2006-2008 Qumranet Technologies |
|
5 |
* Copyright IBM, Corp. 2008 |
|
6 |
* |
|
7 |
* Authors: |
|
8 |
* Anthony Liguori <aliguori@us.ibm.com> |
|
9 |
* |
|
10 |
* This work is licensed under the terms of the GNU GPL, version 2 or later. |
|
11 |
* See the COPYING file in the top-level directory. |
|
12 |
* |
|
13 |
*/ |
|
14 |
|
|
15 |
#include <sys/types.h> |
|
16 |
#include <sys/ioctl.h> |
|
17 |
#include <sys/mman.h> |
|
18 |
|
|
19 |
#include <linux/kvm.h> |
|
20 |
|
|
21 |
#include "qemu-common.h" |
|
22 |
#include "sysemu.h" |
|
23 |
#include "kvm.h" |
|
24 |
#include "cpu.h" |
|
25 |
|
|
26 |
//#define DEBUG_KVM |
|
27 |
|
|
28 |
#ifdef DEBUG_KVM |
|
29 |
#define dprintf(fmt, ...) \ |
|
30 |
do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) |
|
31 |
#else |
|
32 |
#define dprintf(fmt, ...) \ |
|
33 |
do { } while (0) |
|
34 |
#endif |
|
35 |
|
|
36 |
int kvm_arch_init_vcpu(CPUState *env) |
|
37 |
{ |
|
38 |
struct { |
|
39 |
struct kvm_cpuid cpuid; |
|
40 |
struct kvm_cpuid_entry entries[100]; |
|
41 |
} __attribute__((packed)) cpuid_data; |
|
42 |
int limit, i, cpuid_i; |
|
43 |
uint32_t eax, ebx, ecx, edx; |
|
44 |
|
|
45 |
cpuid_i = 0; |
|
46 |
|
|
47 |
cpu_x86_cpuid(env, 0, &eax, &ebx, &ecx, &edx); |
|
48 |
limit = eax; |
|
49 |
|
|
50 |
for (i = 0; i <= limit; i++) { |
|
51 |
struct kvm_cpuid_entry *c = &cpuid_data.entries[cpuid_i++]; |
|
52 |
|
|
53 |
cpu_x86_cpuid(env, i, &eax, &ebx, &ecx, &edx); |
|
54 |
c->function = i; |
|
55 |
c->eax = eax; |
|
56 |
c->ebx = ebx; |
|
57 |
c->ecx = ecx; |
|
58 |
c->edx = edx; |
|
59 |
} |
|
60 |
|
|
61 |
cpu_x86_cpuid(env, 0x80000000, &eax, &ebx, &ecx, &edx); |
|
62 |
limit = eax; |
|
63 |
|
|
64 |
for (i = 0x80000000; i <= limit; i++) { |
|
65 |
struct kvm_cpuid_entry *c = &cpuid_data.entries[cpuid_i++]; |
|
66 |
|
|
67 |
cpu_x86_cpuid(env, i, &eax, &ebx, &ecx, &edx); |
|
68 |
c->function = i; |
|
69 |
c->eax = eax; |
|
70 |
c->ebx = ebx; |
|
71 |
c->ecx = ecx; |
|
72 |
c->edx = edx; |
|
73 |
} |
|
74 |
|
|
75 |
cpuid_data.cpuid.nent = cpuid_i; |
|
76 |
|
|
77 |
return kvm_vcpu_ioctl(env, KVM_SET_CPUID, &cpuid_data); |
|
78 |
} |
|
79 |
|
|
80 |
static int kvm_has_msr_star(CPUState *env) |
|
81 |
{ |
|
82 |
static int has_msr_star; |
|
83 |
int ret; |
|
84 |
|
|
85 |
/* first time */ |
|
86 |
if (has_msr_star == 0) { |
|
87 |
struct kvm_msr_list msr_list, *kvm_msr_list; |
|
88 |
|
|
89 |
has_msr_star = -1; |
|
90 |
|
|
91 |
/* Obtain MSR list from KVM. These are the MSRs that we must |
|
92 |
* save/restore */ |
|
93 |
ret = kvm_ioctl(env->kvm_state, KVM_GET_MSR_INDEX_LIST, &msr_list); |
|
94 |
if (ret < 0) |
|
95 |
return 0; |
|
96 |
|
|
97 |
msr_list.nmsrs = 0; |
|
98 |
kvm_msr_list = qemu_mallocz(sizeof(msr_list) + |
|
99 |
msr_list.nmsrs * sizeof(msr_list.indices[0])); |
|
100 |
if (kvm_msr_list == NULL) |
|
101 |
return 0; |
|
102 |
|
|
103 |
ret = kvm_ioctl(env->kvm_state, KVM_GET_MSR_INDEX_LIST, kvm_msr_list); |
|
104 |
if (ret >= 0) { |
|
105 |
int i; |
|
106 |
|
|
107 |
for (i = 0; i < kvm_msr_list->nmsrs; i++) { |
|
108 |
if (kvm_msr_list->indices[i] == MSR_STAR) { |
|
109 |
has_msr_star = 1; |
|
110 |
break; |
|
111 |
} |
|
112 |
} |
|
113 |
} |
|
114 |
|
|
115 |
free(kvm_msr_list); |
|
116 |
} |
|
117 |
|
|
118 |
if (has_msr_star == 1) |
|
119 |
return 1; |
|
120 |
return 0; |
|
121 |
} |
|
122 |
|
|
123 |
int kvm_arch_init(KVMState *s, int smp_cpus) |
|
124 |
{ |
|
125 |
int ret; |
|
126 |
|
|
127 |
/* create vm86 tss. KVM uses vm86 mode to emulate 16-bit code |
|
128 |
* directly. In order to use vm86 mode, a TSS is needed. Since this |
|
129 |
* must be part of guest physical memory, we need to allocate it. Older |
|
130 |
* versions of KVM just assumed that it would be at the end of physical |
|
131 |
* memory but that doesn't work with more than 4GB of memory. We simply |
|
132 |
* refuse to work with those older versions of KVM. */ |
|
133 |
ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, (void *)KVM_CAP_SET_TSS_ADDR); |
|
134 |
if (ret <= 0) { |
|
135 |
fprintf(stderr, "kvm does not support KVM_CAP_SET_TSS_ADDR\n"); |
|
136 |
return ret; |
|
137 |
} |
|
138 |
|
|
139 |
/* this address is 3 pages before the bios, and the bios should present |
|
140 |
* as unavaible memory. FIXME, need to ensure the e820 map deals with |
|
141 |
* this? |
|
142 |
*/ |
|
143 |
return kvm_vm_ioctl(s, KVM_SET_TSS_ADDR, (void *)0xfffbd000); |
|
144 |
} |
|
145 |
|
|
146 |
static void set_v8086_seg(struct kvm_segment *lhs, const SegmentCache *rhs) |
|
147 |
{ |
|
148 |
lhs->selector = rhs->selector; |
|
149 |
lhs->base = rhs->base; |
|
150 |
lhs->limit = rhs->limit; |
|
151 |
lhs->type = 3; |
|
152 |
lhs->present = 1; |
|
153 |
lhs->dpl = 3; |
|
154 |
lhs->db = 0; |
|
155 |
lhs->s = 1; |
|
156 |
lhs->l = 0; |
|
157 |
lhs->g = 0; |
|
158 |
lhs->avl = 0; |
|
159 |
lhs->unusable = 0; |
|
160 |
} |
|
161 |
|
|
162 |
static void set_seg(struct kvm_segment *lhs, const SegmentCache *rhs) |
|
163 |
{ |
|
164 |
unsigned flags = rhs->flags; |
|
165 |
lhs->selector = rhs->selector; |
|
166 |
lhs->base = rhs->base; |
|
167 |
lhs->limit = rhs->limit; |
|
168 |
lhs->type = (flags >> DESC_TYPE_SHIFT) & 15; |
|
169 |
lhs->present = (flags & DESC_P_MASK) != 0; |
|
170 |
lhs->dpl = rhs->selector & 3; |
|
171 |
lhs->db = (flags >> DESC_B_SHIFT) & 1; |
|
172 |
lhs->s = (flags & DESC_S_MASK) != 0; |
|
173 |
lhs->l = (flags >> DESC_L_SHIFT) & 1; |
|
174 |
lhs->g = (flags & DESC_G_MASK) != 0; |
|
175 |
lhs->avl = (flags & DESC_AVL_MASK) != 0; |
|
176 |
lhs->unusable = 0; |
|
177 |
} |
|
178 |
|
|
179 |
static void get_seg(SegmentCache *lhs, const struct kvm_segment *rhs) |
|
180 |
{ |
|
181 |
lhs->selector = rhs->selector; |
|
182 |
lhs->base = rhs->base; |
|
183 |
lhs->limit = rhs->limit; |
|
184 |
lhs->flags = |
|
185 |
(rhs->type << DESC_TYPE_SHIFT) |
|
186 |
| (rhs->present * DESC_P_MASK) |
|
187 |
| (rhs->dpl << DESC_DPL_SHIFT) |
|
188 |
| (rhs->db << DESC_B_SHIFT) |
|
189 |
| (rhs->s * DESC_S_MASK) |
|
190 |
| (rhs->l << DESC_L_SHIFT) |
|
191 |
| (rhs->g * DESC_G_MASK) |
|
192 |
| (rhs->avl * DESC_AVL_MASK); |
|
193 |
} |
|
194 |
|
|
195 |
static void kvm_getput_reg(__u64 *kvm_reg, target_ulong *qemu_reg, int set) |
|
196 |
{ |
|
197 |
if (set) |
|
198 |
*kvm_reg = *qemu_reg; |
|
199 |
else |
|
200 |
*qemu_reg = *kvm_reg; |
|
201 |
} |
|
202 |
|
|
203 |
static int kvm_getput_regs(CPUState *env, int set) |
|
204 |
{ |
|
205 |
struct kvm_regs regs; |
|
206 |
int ret = 0; |
|
207 |
|
|
208 |
if (!set) { |
|
209 |
ret = kvm_vcpu_ioctl(env, KVM_GET_REGS, ®s); |
|
210 |
if (ret < 0) |
|
211 |
return ret; |
|
212 |
} |
|
213 |
|
|
214 |
kvm_getput_reg(®s.rax, &env->regs[R_EAX], set); |
|
215 |
kvm_getput_reg(®s.rbx, &env->regs[R_EBX], set); |
|
216 |
kvm_getput_reg(®s.rcx, &env->regs[R_ECX], set); |
|
217 |
kvm_getput_reg(®s.rdx, &env->regs[R_EDX], set); |
|
218 |
kvm_getput_reg(®s.rsi, &env->regs[R_ESI], set); |
|
219 |
kvm_getput_reg(®s.rdi, &env->regs[R_EDI], set); |
|
220 |
kvm_getput_reg(®s.rsp, &env->regs[R_ESP], set); |
|
221 |
kvm_getput_reg(®s.rbp, &env->regs[R_EBP], set); |
|
222 |
#ifdef TARGET_X86_64 |
|
223 |
kvm_getput_reg(®s.r8, &env->regs[8], set); |
|
224 |
kvm_getput_reg(®s.r9, &env->regs[9], set); |
|
225 |
kvm_getput_reg(®s.r10, &env->regs[10], set); |
|
226 |
kvm_getput_reg(®s.r11, &env->regs[11], set); |
|
227 |
kvm_getput_reg(®s.r12, &env->regs[12], set); |
|
228 |
kvm_getput_reg(®s.r13, &env->regs[13], set); |
|
229 |
kvm_getput_reg(®s.r14, &env->regs[14], set); |
|
230 |
kvm_getput_reg(®s.r15, &env->regs[15], set); |
|
231 |
#endif |
|
232 |
|
|
233 |
kvm_getput_reg(®s.rflags, &env->eflags, set); |
|
234 |
kvm_getput_reg(®s.rip, &env->eip, set); |
|
235 |
|
|
236 |
if (set) |
|
237 |
ret = kvm_vcpu_ioctl(env, KVM_SET_REGS, ®s); |
|
238 |
|
|
239 |
return ret; |
|
240 |
} |
|
241 |
|
|
242 |
static int kvm_put_fpu(CPUState *env) |
|
243 |
{ |
|
244 |
struct kvm_fpu fpu; |
|
245 |
int i; |
|
246 |
|
|
247 |
memset(&fpu, 0, sizeof fpu); |
|
248 |
fpu.fsw = env->fpus & ~(7 << 11); |
|
249 |
fpu.fsw |= (env->fpstt & 7) << 11; |
|
250 |
fpu.fcw = env->fpuc; |
|
251 |
for (i = 0; i < 8; ++i) |
|
252 |
fpu.ftwx |= (!env->fptags[i]) << i; |
|
253 |
memcpy(fpu.fpr, env->fpregs, sizeof env->fpregs); |
|
254 |
memcpy(fpu.xmm, env->xmm_regs, sizeof env->xmm_regs); |
|
255 |
fpu.mxcsr = env->mxcsr; |
|
256 |
|
|
257 |
return kvm_vcpu_ioctl(env, KVM_SET_FPU, &fpu); |
|
258 |
} |
|
259 |
|
|
260 |
static int kvm_put_sregs(CPUState *env) |
|
261 |
{ |
|
262 |
struct kvm_sregs sregs; |
|
263 |
|
|
264 |
memcpy(sregs.interrupt_bitmap, |
|
265 |
env->interrupt_bitmap, |
|
266 |
sizeof(sregs.interrupt_bitmap)); |
|
267 |
|
|
268 |
if ((env->eflags & VM_MASK)) { |
|
269 |
set_v8086_seg(&sregs.cs, &env->segs[R_CS]); |
|
270 |
set_v8086_seg(&sregs.ds, &env->segs[R_DS]); |
|
271 |
set_v8086_seg(&sregs.es, &env->segs[R_ES]); |
|
272 |
set_v8086_seg(&sregs.fs, &env->segs[R_FS]); |
|
273 |
set_v8086_seg(&sregs.gs, &env->segs[R_GS]); |
|
274 |
set_v8086_seg(&sregs.ss, &env->segs[R_SS]); |
|
275 |
} else { |
|
276 |
set_seg(&sregs.cs, &env->segs[R_CS]); |
|
277 |
set_seg(&sregs.ds, &env->segs[R_DS]); |
|
278 |
set_seg(&sregs.es, &env->segs[R_ES]); |
|
279 |
set_seg(&sregs.fs, &env->segs[R_FS]); |
|
280 |
set_seg(&sregs.gs, &env->segs[R_GS]); |
|
281 |
set_seg(&sregs.ss, &env->segs[R_SS]); |
|
282 |
|
|
283 |
if (env->cr[0] & CR0_PE_MASK) { |
|
284 |
/* force ss cpl to cs cpl */ |
|
285 |
sregs.ss.selector = (sregs.ss.selector & ~3) | |
|
286 |
(sregs.cs.selector & 3); |
|
287 |
sregs.ss.dpl = sregs.ss.selector & 3; |
|
288 |
} |
|
289 |
} |
|
290 |
|
|
291 |
set_seg(&sregs.tr, &env->tr); |
|
292 |
set_seg(&sregs.ldt, &env->ldt); |
|
293 |
|
|
294 |
sregs.idt.limit = env->idt.limit; |
|
295 |
sregs.idt.base = env->idt.base; |
|
296 |
sregs.gdt.limit = env->gdt.limit; |
|
297 |
sregs.gdt.base = env->gdt.base; |
|
298 |
|
|
299 |
sregs.cr0 = env->cr[0]; |
|
300 |
sregs.cr2 = env->cr[2]; |
|
301 |
sregs.cr3 = env->cr[3]; |
|
302 |
sregs.cr4 = env->cr[4]; |
|
303 |
|
|
304 |
sregs.cr8 = cpu_get_apic_tpr(env); |
|
305 |
sregs.apic_base = cpu_get_apic_base(env); |
|
306 |
|
|
307 |
sregs.efer = env->efer; |
|
308 |
|
|
309 |
return kvm_vcpu_ioctl(env, KVM_SET_SREGS, &sregs); |
|
310 |
} |
|
311 |
|
|
312 |
static void kvm_msr_entry_set(struct kvm_msr_entry *entry, |
|
313 |
uint32_t index, uint64_t value) |
|
314 |
{ |
|
315 |
entry->index = index; |
|
316 |
entry->data = value; |
|
317 |
} |
|
318 |
|
|
319 |
static int kvm_put_msrs(CPUState *env) |
|
320 |
{ |
|
321 |
struct { |
|
322 |
struct kvm_msrs info; |
|
323 |
struct kvm_msr_entry entries[100]; |
|
324 |
} msr_data; |
|
325 |
struct kvm_msr_entry *msrs = msr_data.entries; |
|
326 |
int n = 0; |
|
327 |
|
|
328 |
kvm_msr_entry_set(&msrs[n++], MSR_IA32_SYSENTER_CS, env->sysenter_cs); |
|
329 |
kvm_msr_entry_set(&msrs[n++], MSR_IA32_SYSENTER_ESP, env->sysenter_esp); |
|
330 |
kvm_msr_entry_set(&msrs[n++], MSR_IA32_SYSENTER_EIP, env->sysenter_eip); |
|
331 |
if (kvm_has_msr_star(env)) |
|
332 |
kvm_msr_entry_set(&msrs[n++], MSR_STAR, env->star); |
|
333 |
kvm_msr_entry_set(&msrs[n++], MSR_IA32_TSC, env->tsc); |
|
334 |
#ifdef TARGET_X86_64 |
|
335 |
/* FIXME if lm capable */ |
|
336 |
kvm_msr_entry_set(&msrs[n++], MSR_CSTAR, env->cstar); |
|
337 |
kvm_msr_entry_set(&msrs[n++], MSR_KERNELGSBASE, env->kernelgsbase); |
|
338 |
kvm_msr_entry_set(&msrs[n++], MSR_FMASK, env->fmask); |
|
339 |
kvm_msr_entry_set(&msrs[n++], MSR_LSTAR, env->lstar); |
|
340 |
#endif |
|
341 |
msr_data.info.nmsrs = n; |
|
342 |
|
|
343 |
return kvm_vcpu_ioctl(env, KVM_SET_MSRS, &msr_data); |
|
344 |
|
|
345 |
} |
|
346 |
|
|
347 |
|
|
348 |
static int kvm_get_fpu(CPUState *env) |
|
349 |
{ |
|
350 |
struct kvm_fpu fpu; |
|
351 |
int i, ret; |
|
352 |
|
|
353 |
ret = kvm_vcpu_ioctl(env, KVM_GET_FPU, &fpu); |
|
354 |
if (ret < 0) |
|
355 |
return ret; |
|
356 |
|
|
357 |
env->fpstt = (fpu.fsw >> 11) & 7; |
|
358 |
env->fpus = fpu.fsw; |
|
359 |
env->fpuc = fpu.fcw; |
|
360 |
for (i = 0; i < 8; ++i) |
|
361 |
env->fptags[i] = !((fpu.ftwx >> i) & 1); |
|
362 |
memcpy(env->fpregs, fpu.fpr, sizeof env->fpregs); |
|
363 |
memcpy(env->xmm_regs, fpu.xmm, sizeof env->xmm_regs); |
|
364 |
env->mxcsr = fpu.mxcsr; |
|
365 |
|
|
366 |
return 0; |
|
367 |
} |
|
368 |
|
|
369 |
static int kvm_get_sregs(CPUState *env) |
|
370 |
{ |
|
371 |
struct kvm_sregs sregs; |
|
372 |
uint32_t hflags; |
|
373 |
int ret; |
|
374 |
|
|
375 |
ret = kvm_vcpu_ioctl(env, KVM_GET_SREGS, &sregs); |
|
376 |
if (ret < 0) |
|
377 |
return ret; |
|
378 |
|
|
379 |
memcpy(env->interrupt_bitmap, |
|
380 |
sregs.interrupt_bitmap, |
|
381 |
sizeof(sregs.interrupt_bitmap)); |
|
382 |
|
|
383 |
get_seg(&env->segs[R_CS], &sregs.cs); |
|
384 |
get_seg(&env->segs[R_DS], &sregs.ds); |
|
385 |
get_seg(&env->segs[R_ES], &sregs.es); |
|
386 |
get_seg(&env->segs[R_FS], &sregs.fs); |
|
387 |
get_seg(&env->segs[R_GS], &sregs.gs); |
|
388 |
get_seg(&env->segs[R_SS], &sregs.ss); |
|
389 |
|
|
390 |
get_seg(&env->tr, &sregs.tr); |
|
391 |
get_seg(&env->ldt, &sregs.ldt); |
|
392 |
|
|
393 |
env->idt.limit = sregs.idt.limit; |
|
394 |
env->idt.base = sregs.idt.base; |
|
395 |
env->gdt.limit = sregs.gdt.limit; |
|
396 |
env->gdt.base = sregs.gdt.base; |
|
397 |
|
|
398 |
env->cr[0] = sregs.cr0; |
|
399 |
env->cr[2] = sregs.cr2; |
|
400 |
env->cr[3] = sregs.cr3; |
|
401 |
env->cr[4] = sregs.cr4; |
|
402 |
|
|
403 |
cpu_set_apic_base(env, sregs.apic_base); |
|
404 |
|
|
405 |
env->efer = sregs.efer; |
|
406 |
//cpu_set_apic_tpr(env, sregs.cr8); |
|
407 |
|
|
408 |
#define HFLAG_COPY_MASK ~( \ |
|
409 |
HF_CPL_MASK | HF_PE_MASK | HF_MP_MASK | HF_EM_MASK | \ |
|
410 |
HF_TS_MASK | HF_TF_MASK | HF_VM_MASK | HF_IOPL_MASK | \ |
|
411 |
HF_OSFXSR_MASK | HF_LMA_MASK | HF_CS32_MASK | \ |
|
412 |
HF_SS32_MASK | HF_CS64_MASK | HF_ADDSEG_MASK) |
|
413 |
|
|
414 |
|
|
415 |
|
|
416 |
hflags = (env->segs[R_CS].flags >> DESC_DPL_SHIFT) & HF_CPL_MASK; |
|
417 |
hflags |= (env->cr[0] & CR0_PE_MASK) << (HF_PE_SHIFT - CR0_PE_SHIFT); |
|
418 |
hflags |= (env->cr[0] << (HF_MP_SHIFT - CR0_MP_SHIFT)) & |
|
419 |
(HF_MP_MASK | HF_EM_MASK | HF_TS_MASK); |
|
420 |
hflags |= (env->eflags & (HF_TF_MASK | HF_VM_MASK | HF_IOPL_MASK)); |
|
421 |
hflags |= (env->cr[4] & CR4_OSFXSR_MASK) << |
|
422 |
(HF_OSFXSR_SHIFT - CR4_OSFXSR_SHIFT); |
|
423 |
|
|
424 |
if (env->efer & MSR_EFER_LMA) { |
|
425 |
hflags |= HF_LMA_MASK; |
|
426 |
} |
|
427 |
|
|
428 |
if ((hflags & HF_LMA_MASK) && (env->segs[R_CS].flags & DESC_L_MASK)) { |
|
429 |
hflags |= HF_CS32_MASK | HF_SS32_MASK | HF_CS64_MASK; |
|
430 |
} else { |
|
431 |
hflags |= (env->segs[R_CS].flags & DESC_B_MASK) >> |
|
432 |
(DESC_B_SHIFT - HF_CS32_SHIFT); |
|
433 |
hflags |= (env->segs[R_SS].flags & DESC_B_MASK) >> |
|
434 |
(DESC_B_SHIFT - HF_SS32_SHIFT); |
|
435 |
if (!(env->cr[0] & CR0_PE_MASK) || |
|
436 |
(env->eflags & VM_MASK) || |
|
437 |
!(hflags & HF_CS32_MASK)) { |
|
438 |
hflags |= HF_ADDSEG_MASK; |
|
439 |
} else { |
|
440 |
hflags |= ((env->segs[R_DS].base | |
|
441 |
env->segs[R_ES].base | |
|
442 |
env->segs[R_SS].base) != 0) << |
|
443 |
HF_ADDSEG_SHIFT; |
|
444 |
} |
|
445 |
} |
|
446 |
env->hflags = (env->hflags & HFLAG_COPY_MASK) | hflags; |
|
447 |
env->cc_src = env->eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C); |
|
448 |
env->df = 1 - (2 * ((env->eflags >> 10) & 1)); |
|
449 |
env->cc_op = CC_OP_EFLAGS; |
|
450 |
env->eflags &= ~(DF_MASK | CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C); |
|
451 |
|
|
452 |
return 0; |
|
453 |
} |
|
454 |
|
|
455 |
static int kvm_get_msrs(CPUState *env) |
|
456 |
{ |
|
457 |
struct { |
|
458 |
struct kvm_msrs info; |
|
459 |
struct kvm_msr_entry entries[100]; |
|
460 |
} msr_data; |
|
461 |
struct kvm_msr_entry *msrs = msr_data.entries; |
|
462 |
int ret, i, n; |
|
463 |
|
|
464 |
n = 0; |
|
465 |
msrs[n++].index = MSR_IA32_SYSENTER_CS; |
|
466 |
msrs[n++].index = MSR_IA32_SYSENTER_ESP; |
|
467 |
msrs[n++].index = MSR_IA32_SYSENTER_EIP; |
|
468 |
if (kvm_has_msr_star(env)) |
|
469 |
msrs[n++].index = MSR_STAR; |
|
470 |
msrs[n++].index = MSR_IA32_TSC; |
|
471 |
#ifdef TARGET_X86_64 |
|
472 |
/* FIXME lm_capable_kernel */ |
|
473 |
msrs[n++].index = MSR_CSTAR; |
|
474 |
msrs[n++].index = MSR_KERNELGSBASE; |
|
475 |
msrs[n++].index = MSR_FMASK; |
|
476 |
msrs[n++].index = MSR_LSTAR; |
|
477 |
#endif |
|
478 |
msr_data.info.nmsrs = n; |
|
479 |
ret = kvm_vcpu_ioctl(env, KVM_GET_MSRS, &msr_data); |
|
480 |
if (ret < 0) |
|
481 |
return ret; |
|
482 |
|
|
483 |
for (i = 0; i < ret; i++) { |
|
484 |
switch (msrs[i].index) { |
|
485 |
case MSR_IA32_SYSENTER_CS: |
|
486 |
env->sysenter_cs = msrs[i].data; |
|
487 |
break; |
|
488 |
case MSR_IA32_SYSENTER_ESP: |
|
489 |
env->sysenter_esp = msrs[i].data; |
|
490 |
break; |
|
491 |
case MSR_IA32_SYSENTER_EIP: |
|
492 |
env->sysenter_eip = msrs[i].data; |
|
493 |
break; |
|
494 |
case MSR_STAR: |
|
495 |
env->star = msrs[i].data; |
|
496 |
break; |
|
497 |
#ifdef TARGET_X86_64 |
|
498 |
case MSR_CSTAR: |
|
499 |
env->cstar = msrs[i].data; |
|
500 |
break; |
|
501 |
case MSR_KERNELGSBASE: |
|
502 |
env->kernelgsbase = msrs[i].data; |
|
503 |
break; |
|
504 |
case MSR_FMASK: |
|
505 |
env->fmask = msrs[i].data; |
|
506 |
break; |
|
507 |
case MSR_LSTAR: |
|
508 |
env->lstar = msrs[i].data; |
|
509 |
break; |
|
510 |
#endif |
|
511 |
case MSR_IA32_TSC: |
|
512 |
env->tsc = msrs[i].data; |
|
513 |
break; |
|
514 |
} |
|
515 |
} |
|
516 |
|
|
517 |
return 0; |
|
518 |
} |
|
519 |
|
|
520 |
int kvm_arch_put_registers(CPUState *env) |
|
521 |
{ |
|
522 |
int ret; |
|
523 |
|
|
524 |
ret = kvm_getput_regs(env, 1); |
|
525 |
if (ret < 0) |
|
526 |
return ret; |
|
527 |
|
|
528 |
ret = kvm_put_fpu(env); |
|
529 |
if (ret < 0) |
|
530 |
return ret; |
|
531 |
|
|
532 |
ret = kvm_put_sregs(env); |
|
533 |
if (ret < 0) |
|
534 |
return ret; |
|
535 |
|
|
536 |
ret = kvm_put_msrs(env); |
|
537 |
if (ret < 0) |
|
538 |
return ret; |
|
539 |
|
|
540 |
return 0; |
|
541 |
} |
|
542 |
|
|
543 |
int kvm_arch_get_registers(CPUState *env) |
|
544 |
{ |
|
545 |
int ret; |
|
546 |
|
|
547 |
ret = kvm_getput_regs(env, 0); |
|
548 |
if (ret < 0) |
|
549 |
return ret; |
|
550 |
|
|
551 |
ret = kvm_get_fpu(env); |
|
552 |
if (ret < 0) |
|
553 |
return ret; |
|
554 |
|
|
555 |
ret = kvm_get_sregs(env); |
|
556 |
if (ret < 0) |
|
557 |
return ret; |
|
558 |
|
|
559 |
ret = kvm_get_msrs(env); |
|
560 |
if (ret < 0) |
|
561 |
return ret; |
|
562 |
|
|
563 |
return 0; |
|
564 |
} |
|
565 |
|
|
566 |
int kvm_arch_pre_run(CPUState *env, struct kvm_run *run) |
|
567 |
{ |
|
568 |
/* Try to inject an interrupt if the guest can accept it */ |
|
569 |
if (run->ready_for_interrupt_injection && |
|
570 |
(env->interrupt_request & CPU_INTERRUPT_HARD) && |
|
571 |
(env->eflags & IF_MASK)) { |
|
572 |
int irq; |
|
573 |
|
|
574 |
env->interrupt_request &= ~CPU_INTERRUPT_HARD; |
|
575 |
irq = cpu_get_pic_interrupt(env); |
|
576 |
if (irq >= 0) { |
|
577 |
struct kvm_interrupt intr; |
|
578 |
intr.irq = irq; |
|
579 |
/* FIXME: errors */ |
|
580 |
dprintf("injected interrupt %d\n", irq); |
|
581 |
kvm_vcpu_ioctl(env, KVM_INTERRUPT, &intr); |
|
582 |
} |
|
583 |
} |
|
584 |
|
|
585 |
/* If we have an interrupt but the guest is not ready to receive an |
|
586 |
* interrupt, request an interrupt window exit. This will |
|
587 |
* cause a return to userspace as soon as the guest is ready to |
|
588 |
* receive interrupts. */ |
|
589 |
if ((env->interrupt_request & CPU_INTERRUPT_HARD)) |
|
590 |
run->request_interrupt_window = 1; |
|
591 |
else |
|
592 |
run->request_interrupt_window = 0; |
|
593 |
|
|
594 |
dprintf("setting tpr\n"); |
|
595 |
run->cr8 = cpu_get_apic_tpr(env); |
|
596 |
|
|
597 |
return 0; |
|
598 |
} |
|
599 |
|
|
600 |
int kvm_arch_post_run(CPUState *env, struct kvm_run *run) |
|
601 |
{ |
|
602 |
if (run->if_flag) |
|
603 |
env->eflags |= IF_MASK; |
|
604 |
else |
|
605 |
env->eflags &= ~IF_MASK; |
|
606 |
|
|
607 |
cpu_set_apic_tpr(env, run->cr8); |
|
608 |
cpu_set_apic_base(env, run->apic_base); |
|
609 |
|
|
610 |
return 0; |
|
611 |
} |
|
612 |
|
|
613 |
static int kvm_handle_halt(CPUState *env) |
|
614 |
{ |
|
615 |
if (!((env->interrupt_request & CPU_INTERRUPT_HARD) && |
|
616 |
(env->eflags & IF_MASK)) && |
|
617 |
!(env->interrupt_request & CPU_INTERRUPT_NMI)) { |
|
618 |
env->halted = 1; |
|
619 |
env->exception_index = EXCP_HLT; |
|
620 |
return 0; |
|
621 |
} |
|
622 |
|
|
623 |
return 1; |
|
624 |
} |
|
625 |
|
|
626 |
int kvm_arch_handle_exit(CPUState *env, struct kvm_run *run) |
|
627 |
{ |
|
628 |
int ret = 0; |
|
629 |
|
|
630 |
switch (run->exit_reason) { |
|
631 |
case KVM_EXIT_HLT: |
|
632 |
dprintf("handle_hlt\n"); |
|
633 |
ret = kvm_handle_halt(env); |
|
634 |
break; |
|
635 |
} |
|
636 |
|
|
637 |
return ret; |
|
638 |
} |
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