最近在研究qemu的用法，在次做一些筆記，希望大家批評指正，多做交流。
vl.c 中main函數内容記錄：
進入main函數：
2846：
module_call_init(MODULE_INIT_QOM);——————————以MODULE_INIT_QOM類型，對各個調用的子產品初始化
進入module_call_init (type=MODULE_INIT_QOM) at util/module.c:72
typedef enum {
MODULE_INIT_BLOCK,
MODULE_INIT_MACHINE,
MODULE_INIT_QAPI,
MODULE_INIT_QOM,
MODULE_INIT_MAX
} module_init_type;
static ModuleTypeList *find_type(module_init_type type)
{
ModuleTypeList *l;
init_types();
l = &init_type_list[type];
return l;
}
2848：
qemu_add_opts(&qemu_drive_opts);——————————————擷取各種需要的參數
qemu_add_opts(&qemu_chardev_opts);
qemu_add_opts(&qemu_device_opts);
qemu_add_opts(&qemu_netdev_opts);
qemu_add_opts(&qemu_net_opts);
qemu_add_opts(&qemu_rtc_opts);
qemu_add_opts(&qemu_global_opts);
qemu_add_opts(&qemu_mon_opts);
qemu_add_opts(&qemu_trace_opts);
qemu_add_opts(&qemu_option_rom_opts);
qemu_add_opts(&qemu_machine_opts);
qemu_add_opts(&qemu_boot_opts);
qemu_add_opts(&qemu_sandbox_opts);
qemu_add_opts(&qemu_add_fd_opts);
qemu_add_opts(&qemu_object_opts);
void qemu_add_opts(QemuOptsList *list) ——————————————擷取各種需要的參數
{
int entries, i;
entries = ARRAY_SIZE(vm_config_groups);
entries--;
for (i = 0; i < entries; i++) {
if (vm_config_groups[i] == NULL) {
vm_config_groups[i] = list;
return;
}
}
fprintf(stderr, "ran out of space in vm_config_groups");
abort();
}
struct QemuOptsList {
const char *name;
const char *implied_opt_name;
bool merge_lists;
QTAILQ_HEAD(, QemuOpts) head;
QemuOptDesc desc[];
};
2864 runstate_init();————————————對運作狀态進行初始化（ vl.c）
522
523
524
525 static RunState current_run_state = RUN_STATE_PRELAUNCH;
526
527 typedef struct {
528 RunState from;
529 RunState to;
530 } RunStateTransition;
531
532 static const RunStateTransition runstate_transitions_def[] = {
533
534 { RUN_STATE_DEBUG, RUN_STATE_RUNNING },
535
536 { RUN_STATE_INMIGRATE, RUN_STATE_RUNNING },
537 { RUN_STATE_INMIGRATE, RUN_STATE_PAUSED },
538
539 { RUN_STATE_INTERNAL_ERROR, RUN_STATE_PAUSED },
540 { RUN_STATE_INTERNAL_ERROR, RUN_STATE_FINISH_MIGRATE },
541
542 { RUN_STATE_IO_ERROR, RUN_STATE_RUNNING },
543 { RUN_STATE_IO_ERROR, RUN_STATE_FINISH_MIGRATE },
544
545 { RUN_STATE_PAUSED, RUN_STATE_RUNNING },
546 { RUN_STATE_PAUSED, RUN_STATE_FINISH_MIGRATE },
547
548 { RUN_STATE_POSTMIGRATE, RUN_STATE_RUNNING },
549 { RUN_STATE_POSTMIGRATE, RUN_STATE_FINISH_MIGRATE },
550
551 { RUN_STATE_PRELAUNCH, RUN_STATE_RUNNING },
552 { RUN_STATE_PRELAUNCH, RUN_STATE_FINISH_MIGRATE },
553 { RUN_STATE_PRELAUNCH, RUN_STATE_INMIGRATE },
554
555 { RUN_STATE_FINISH_MIGRATE, RUN_STATE_RUNNING },
556 { RUN_STATE_FINISH_MIGRATE, RUN_STATE_POSTMIGRATE },
557
558 { RUN_STATE_RESTORE_VM, RUN_STATE_RUNNING },
559
560 { RUN_STATE_RUNNING, RUN_STATE_DEBUG },
561 { RUN_STATE_RUNNING, RUN_STATE_INTERNAL_ERROR },
562 { RUN_STATE_RUNNING, RUN_STATE_IO_ERROR },
563 { RUN_STATE_RUNNING, RUN_STATE_PAUSED },
564 { RUN_STATE_RUNNING, RUN_STATE_FINISH_MIGRATE },
565 { RUN_STATE_RUNNING, RUN_STATE_RESTORE_VM },
566 { RUN_STATE_RUNNING, RUN_STATE_SAVE_VM },
567 { RUN_STATE_RUNNING, RUN_STATE_SHUTDOWN },
568 { RUN_STATE_RUNNING, RUN_STATE_WATCHDOG },
569
570 { RUN_STATE_SAVE_VM, RUN_STATE_RUNNING },
571
572 { RUN_STATE_SHUTDOWN, RUN_STATE_PAUSED },
573 { RUN_STATE_SHUTDOWN, RUN_STATE_FINISH_MIGRATE },
574
575 { RUN_STATE_DEBUG, RUN_STATE_SUSPENDED },
576 { RUN_STATE_RUNNING, RUN_STATE_SUSPENDED },
577 { RUN_STATE_SUSPENDED, RUN_STATE_RUNNING },
578 { RUN_STATE_SUSPENDED, RUN_STATE_FINISH_MIGRATE },
579
580 { RUN_STATE_WATCHDOG, RUN_STATE_RUNNING },
581 { RUN_STATE_WATCHDOG, RUN_STATE_FINISH_MIGRATE },
582
583 { RUN_STATE_MAX, RUN_STATE_MAX },
584 };
2866 ：
init_clocks();——————————————————初始化guest的時鐘為host的時鐘：
rtc_clock = host_clock;
2874：
module_call_init(MODULE_INIT_MACHINE);————以MODULE_INIT_MACHINE類型進行子產品調用初始化
2875：
machine = find_default_machine();
2894 while (optind < argc) {————————————第一次周遊指令行參數
2916：
ret = qemu_read_default_config_files(userconfig);——————————讀取使用者預設配置：
qemu_read_default_config_files (userconfig=true)
at /home/robin/workspace/qemu_workspace/debug/qemu-1.4.0/arch_init.c:150
預設配置檔案的位置定義如下兩個，我發現與自己機器的不符合，是不是要添加自己的在下面呢？？？？？？？
142 default_config_files[] = {——————————————arch_init.c
143 { CONFIG_QEMU_CONFDIR "/qemu.conf", true },
144 { CONFIG_QEMU_CONFDIR "/target-" TARGET_ARCH ".conf", true },
145 { NULL },
146 };
./config-host.h:2:#define CONFIG_QEMU_CONFDIR "/usr/local/etc/qemu"
./config-host.h-timestamp:2:#define CONFIG_QEMU_CONFDIR "/usr/local/etc/qemu"
158
ret = qemu_read_config_file(f->filename);
qemu_read_config_file (filename=0x80510bbc "/usr/local/etc/qemu/qemu.conf") at util/qemu-config.c:199
2924
for(;;) {——————————————第二次周遊指令行參數
3814
loc_set_none();
3854
cpudef_init();————————cpu的初始化
3994：
socket_init();—————————初始化socket
初始化cpu_loop:
4055
qemu_init_cpu_loop();
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