vl.c

/*
 * QEMU System Emulator
 *
 * Copyright (c) 2003-2008 Fabrice Bellard
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
#include <unistd.h>
#include <fcntl.h>
#include <signal.h>
#include <time.h>
#include <errno.h>
#include <sys/time.h>
#include <zlib.h>
#include "qemu/bitmap.h"

/* Needed early for CONFIG_BSD etc. */
#include "config-host.h"

#ifndef _WIN32
#include <libgen.h>
#include <sys/times.h>
#include <sys/wait.h>
#include <termios.h>
#include <sys/mman.h>
#include <sys/ioctl.h>
#include <sys/resource.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <net/if.h>
#include <arpa/inet.h>
#include <dirent.h>
#include <netdb.h>
#include <sys/select.h>

#ifdef CONFIG_BSD
#include <sys/stat.h>
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
#include <sys/sysctl.h>
#else
#include <util.h>
#endif
#else
#ifdef __linux__
#include <malloc.h>

#include <linux/ppdev.h>
#include <linux/parport.h>
#endif

#ifdef CONFIG_SECCOMP
#include "sysemu/seccomp.h"
#endif

#ifdef __sun__
#include <sys/stat.h>
#include <sys/ethernet.h>
#include <sys/sockio.h>
#include <netinet/arp.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_icmp.h> // must come after ip.h
#include <netinet/udp.h>
#include <netinet/tcp.h>
#include <net/if.h>
#include <syslog.h>
#include <stropts.h>
#endif
#endif
#endif

#if defined(CONFIG_VDE)
#include <libvdeplug.h>
#endif

#ifdef _WIN32
#include <windows.h>
#endif

#ifdef CONFIG_SDL
#if defined(__APPLE__) || defined(main)
#include <SDL.h>
int qemu_main(int argc, char **argv, char **envp);
int main(int argc, char **argv)
{
    return qemu_main(argc, argv, NULL);
}
#undef main
#define main qemu_main
#endif
#endif /* CONFIG_SDL */

#ifdef CONFIG_COCOA
#undef main
#define main qemu_main
#endif /* CONFIG_COCOA */

#include <glib.h>

#include "hw/hw.h"
#include "hw/boards.h"
#include "hw/usb.h"
#include "hw/pcmcia.h"
#include "hw/i386/pc.h"
#include "hw/isa/isa.h"
#include "hw/bt.h"
#include "sysemu/watchdog.h"
#include "hw/i386/smbios.h"
#include "hw/xen/xen.h"
#include "hw/qdev.h"
#include "hw/loader.h"
#include "monitor/qdev.h"
#include "sysemu/bt.h"
#include "net/net.h"
#include "net/slirp.h"
#include "monitor/monitor.h"
#include "ui/console.h"
#include "sysemu/sysemu.h"
#include "exec/gdbstub.h"
#include "qemu/timer.h"
#include "sysemu/char.h"
#include "qemu/cache-utils.h"
#include "sysemu/blockdev.h"
#include "hw/block/block.h"
#include "migration/block.h"
#include "sysemu/tpm.h"
#include "sysemu/dma.h"
#include "audio/audio.h"
#include "migration/migration.h"
#include "sysemu/kvm.h"
#include "qapi/qmp/qjson.h"
#include "qemu/option.h"
#include "qemu/config-file.h"
#include "qemu-options.h"
#include "qmp-commands.h"
#include "qemu/main-loop.h"
#ifdef CONFIG_VIRTFS
#include "fsdev/qemu-fsdev.h"
#endif
#include "sysemu/qtest.h"

#include "disas/disas.h"

#include "qemu/sockets.h"

#include "slirp/libslirp.h"

#include "trace.h"
#include "trace/control.h"
#include "qemu/queue.h"
#include "sysemu/cpus.h"
#include "sysemu/arch_init.h"
#include "qemu/osdep.h"

#include "ui/qemu-spice.h"
#include "qapi/string-input-visitor.h"

//#define DEBUG_NET
//#define DEBUG_SLIRP

#define DEFAULT_RAM_SIZE 128

#define MAX_VIRTIO_CONSOLES 1
#define MAX_SCLP_CONSOLES 1

static const char *data_dir[16];
static int data_dir_idx;
const char *bios_name = NULL;
enum vga_retrace_method vga_retrace_method = VGA_RETRACE_DUMB;
DisplayType display_type = DT_DEFAULT;
static int display_remote;
const char* keyboard_layout = NULL;
ram_addr_t ram_size;
const char *mem_path = NULL;
#ifdef MAP_POPULATE
int mem_prealloc = 0; /* force preallocation of physical target memory */
#endif
int nb_nics;
NICInfo nd_table[MAX_NICS];
int autostart;
static int rtc_utc = 1;
static int rtc_date_offset = -1; /* -1 means no change */
QEMUClock *rtc_clock;
int vga_interface_type = VGA_NONE;
static int full_screen = 0;
#ifdef CONFIG_SDL
static int no_frame = 0;
#endif
int no_quit = 0;
CharDriverState *serial_hds[MAX_SERIAL_PORTS];
CharDriverState *parallel_hds[MAX_PARALLEL_PORTS];
CharDriverState *virtcon_hds[MAX_VIRTIO_CONSOLES];
CharDriverState *sclp_hds[MAX_SCLP_CONSOLES];
int win2k_install_hack = 0;
int singlestep = 0;
int smp_cpus = 1;
int max_cpus = 0;
int smp_cores = 1;
int smp_threads = 1;
#ifdef CONFIG_VNC
const char *vnc_display;
#endif
int acpi_enabled = 1;
int no_hpet = 0;
int fd_bootchk = 1;
static int no_reboot;
int no_shutdown = 0;
int cursor_hide = 1;
int graphic_rotate = 0;
const char *watchdog;
QEMUOptionRom option_rom[MAX_OPTION_ROMS];
int nb_option_roms;
int semihosting_enabled = 0;
int old_param = 0;
const char *qemu_name;
int alt_grab = 0;
int ctrl_grab = 0;
unsigned int nb_prom_envs = 0;
const char *prom_envs[MAX_PROM_ENVS];
int boot_menu;
bool boot_strict;
uint8_t *boot_splash_filedata;
size_t boot_splash_filedata_size;
uint8_t qemu_extra_params_fw[2];

typedef struct FWBootEntry FWBootEntry;

struct FWBootEntry {
    QTAILQ_ENTRY(FWBootEntry) link;
    int32_t bootindex;
    DeviceState *dev;
    char *suffix;
};

static QTAILQ_HEAD(, FWBootEntry) fw_boot_order =
    QTAILQ_HEAD_INITIALIZER(fw_boot_order);

int nb_numa_nodes;
uint64_t node_mem[MAX_NODES];
unsigned long *node_cpumask[MAX_NODES];

uint8_t qemu_uuid[16];

static QEMUBootSetHandler *boot_set_handler;
static void *boot_set_opaque;

static NotifierList exit_notifiers =
    NOTIFIER_LIST_INITIALIZER(exit_notifiers);

static NotifierList machine_init_done_notifiers =
    NOTIFIER_LIST_INITIALIZER(machine_init_done_notifiers);

static bool tcg_allowed = true;
bool xen_allowed;
uint32_t xen_domid;
enum xen_mode xen_mode = XEN_EMULATE;
static int tcg_tb_size;

static int default_serial = 1;
static int default_parallel = 1;
static int default_virtcon = 1;
static int default_sclp = 1;
static int default_monitor = 1;
static int default_floppy = 1;
static int default_cdrom = 1;
static int default_sdcard = 1;
static int default_vga = 1;

static struct {
    const char *driver;
    int *flag;
} default_list[] = {
    { .driver = "isa-serial",           .flag = &default_serial    },
    { .driver = "isa-parallel",         .flag = &default_parallel  },
    { .driver = "isa-fdc",              .flag = &default_floppy    },
    { .driver = "ide-cd",               .flag = &default_cdrom     },
    { .driver = "ide-hd",               .flag = &default_cdrom     },
    { .driver = "ide-drive",            .flag = &default_cdrom     },
    { .driver = "scsi-cd",              .flag = &default_cdrom     },
    { .driver = "virtio-serial-pci",    .flag = &default_virtcon   },
    { .driver = "virtio-serial-s390",   .flag = &default_virtcon   },
    { .driver = "virtio-serial",        .flag = &default_virtcon   },
    { .driver = "VGA",                  .flag = &default_vga       },
    { .driver = "isa-vga",              .flag = &default_vga       },
    { .driver = "cirrus-vga",           .flag = &default_vga       },
    { .driver = "isa-cirrus-vga",       .flag = &default_vga       },
    { .driver = "vmware-svga",          .flag = &default_vga       },
    { .driver = "qxl-vga",              .flag = &default_vga       },
};

static QemuOptsList qemu_rtc_opts = {
    .name = "rtc",
    .head = QTAILQ_HEAD_INITIALIZER(qemu_rtc_opts.head),
    .desc = {
        {
            .name = "base",
            .type = QEMU_OPT_STRING,
        },{
            .name = "clock",
            .type = QEMU_OPT_STRING,
        },{
            .name = "driftfix",
            .type = QEMU_OPT_STRING,
        },
        { /* end of list */ }
    },
};

static QemuOptsList qemu_sandbox_opts = {
    .name = "sandbox",
    .implied_opt_name = "enable",
    .head = QTAILQ_HEAD_INITIALIZER(qemu_sandbox_opts.head),
    .desc = {
        {
            .name = "enable",
            .type = QEMU_OPT_BOOL,
        },
        { /* end of list */ }
    },
};

static QemuOptsList qemu_trace_opts = {
    .name = "trace",
    .implied_opt_name = "trace",
    .head = QTAILQ_HEAD_INITIALIZER(qemu_trace_opts.head),
    .desc = {
        {
            .name = "events",
            .type = QEMU_OPT_STRING,
        },{
            .name = "file",
            .type = QEMU_OPT_STRING,
        },
        { /* end of list */ }
    },
};

static QemuOptsList qemu_option_rom_opts = {
    .name = "option-rom",
    .implied_opt_name = "romfile",
    .head = QTAILQ_HEAD_INITIALIZER(qemu_option_rom_opts.head),
    .desc = {
        {
            .name = "bootindex",
            .type = QEMU_OPT_NUMBER,
        }, {
            .name = "romfile",
            .type = QEMU_OPT_STRING,
        },
        { /* end of list */ }
    },
};

static QemuOptsList qemu_machine_opts = {
    .name = "machine",
    .implied_opt_name = "type",
    .merge_lists = true,
    .head = QTAILQ_HEAD_INITIALIZER(qemu_machine_opts.head),
    .desc = {
        {
            .name = "type",
            .type = QEMU_OPT_STRING,
            .help = "emulated machine"
        }, {
            .name = "accel",
            .type = QEMU_OPT_STRING,
            .help = "accelerator list",
        }, {
            .name = "kernel_irqchip",
            .type = QEMU_OPT_BOOL,
            .help = "use KVM in-kernel irqchip",
        }, {
            .name = "kvm_shadow_mem",
            .type = QEMU_OPT_SIZE,
            .help = "KVM shadow MMU size",
        }, {
            .name = "kernel",
            .type = QEMU_OPT_STRING,
            .help = "Linux kernel image file",
        }, {
            .name = "initrd",
            .type = QEMU_OPT_STRING,
            .help = "Linux initial ramdisk file",
        }, {
            .name = "append",
            .type = QEMU_OPT_STRING,
            .help = "Linux kernel command line",
        }, {
            .name = "dtb",
            .type = QEMU_OPT_STRING,
            .help = "Linux kernel device tree file",
        }, {
            .name = "dumpdtb",
            .type = QEMU_OPT_STRING,
            .help = "Dump current dtb to a file and quit",
        }, {
            .name = "phandle_start",
            .type = QEMU_OPT_STRING,
            .help = "The first phandle ID we may generate dynamically",
        }, {
            .name = "dt_compatible",
            .type = QEMU_OPT_STRING,
            .help = "Overrides the \"compatible\" property of the dt root node",
        }, {
            .name = "dump-guest-core",
            .type = QEMU_OPT_BOOL,
            .help = "Include guest memory in  a core dump",
        }, {
            .name = "mem-merge",
            .type = QEMU_OPT_BOOL,
            .help = "enable/disable memory merge support",
        },{
            .name = "usb",
            .type = QEMU_OPT_BOOL,
            .help = "Set on/off to enable/disable usb",
        },
        { /* End of list */ }
    },
};

static QemuOptsList qemu_boot_opts = {
    .name = "boot-opts",
    .head = QTAILQ_HEAD_INITIALIZER(qemu_boot_opts.head),
    .desc = {
        /* the three names below are not used now */
        {
            .name = "order",
            .type = QEMU_OPT_STRING,
        }, {
            .name = "once",
            .type = QEMU_OPT_STRING,
        }, {
            .name = "menu",
            .type = QEMU_OPT_STRING,
        /* following are really used */
        }, {
            .name = "splash",
            .type = QEMU_OPT_STRING,
        }, {
            .name = "splash-time",
            .type = QEMU_OPT_STRING,
        }, {
            .name = "reboot-timeout",
            .type = QEMU_OPT_STRING,
        }, {
            .name = "strict",
            .type = QEMU_OPT_STRING,
        },
        { /*End of list */ }
    },
};

static QemuOptsList qemu_add_fd_opts = {
    .name = "add-fd",
    .head = QTAILQ_HEAD_INITIALIZER(qemu_add_fd_opts.head),
    .desc = {
        {
            .name = "fd",
            .type = QEMU_OPT_NUMBER,
            .help = "file descriptor of which a duplicate is added to fd set",
        },{
            .name = "set",
            .type = QEMU_OPT_NUMBER,
            .help = "ID of the fd set to add fd to",
        },{
            .name = "opaque",
            .type = QEMU_OPT_STRING,
            .help = "free-form string used to describe fd",
        },
        { /* end of list */ }
    },
};

static QemuOptsList qemu_object_opts = {
    .name = "object",
    .implied_opt_name = "qom-type",
    .head = QTAILQ_HEAD_INITIALIZER(qemu_object_opts.head),
    .desc = {
        { }
    },
};

static QemuOptsList qemu_tpmdev_opts = {
    .name = "tpmdev",
    .implied_opt_name = "type",
    .head = QTAILQ_HEAD_INITIALIZER(qemu_tpmdev_opts.head),
    .desc = {
        /* options are defined in the TPM backends */
        { /* end of list */ }
    },
};

static QemuOptsList qemu_realtime_opts = {
    .name = "realtime",
    .head = QTAILQ_HEAD_INITIALIZER(qemu_realtime_opts.head),
    .desc = {
        {
            .name = "mlock",
            .type = QEMU_OPT_BOOL,
        },
        { /* end of list */ }
    },
};

const char *qemu_get_vm_name(void)
{
    return qemu_name;
}

static void res_free(void)
{
    if (boot_splash_filedata != NULL) {
        g_free(boot_splash_filedata);
        boot_splash_filedata = NULL;
    }
}

static int default_driver_check(QemuOpts *opts, void *opaque)
{
    const char *driver = qemu_opt_get(opts, "driver");
    int i;

    if (!driver)
        return 0;
    for (i = 0; i < ARRAY_SIZE(default_list); i++) {
        if (strcmp(default_list[i].driver, driver) != 0)
            continue;
        *(default_list[i].flag) = 0;
    }
    return 0;
}

/***********************************************************/
/* QEMU state */

static RunState current_run_state = RUN_STATE_PRELAUNCH;

typedef struct {
    RunState from;
    RunState to;
} RunStateTransition;

static const RunStateTransition runstate_transitions_def[] = {
    /*     from      ->     to      */
    { RUN_STATE_DEBUG, RUN_STATE_RUNNING },

    { RUN_STATE_INMIGRATE, RUN_STATE_RUNNING },
    { RUN_STATE_INMIGRATE, RUN_STATE_PAUSED },

    { RUN_STATE_INTERNAL_ERROR, RUN_STATE_PAUSED },
    { RUN_STATE_INTERNAL_ERROR, RUN_STATE_FINISH_MIGRATE },

    { RUN_STATE_IO_ERROR, RUN_STATE_RUNNING },
    { RUN_STATE_IO_ERROR, RUN_STATE_FINISH_MIGRATE },

    { RUN_STATE_PAUSED, RUN_STATE_RUNNING },
    { RUN_STATE_PAUSED, RUN_STATE_FINISH_MIGRATE },

    { RUN_STATE_POSTMIGRATE, RUN_STATE_RUNNING },
    { RUN_STATE_POSTMIGRATE, RUN_STATE_FINISH_MIGRATE },

    { RUN_STATE_PRELAUNCH, RUN_STATE_RUNNING },
    { RUN_STATE_PRELAUNCH, RUN_STATE_FINISH_MIGRATE },
    { RUN_STATE_PRELAUNCH, RUN_STATE_INMIGRATE },

    { RUN_STATE_FINISH_MIGRATE, RUN_STATE_RUNNING },
    { RUN_STATE_FINISH_MIGRATE, RUN_STATE_POSTMIGRATE },

    { RUN_STATE_RESTORE_VM, RUN_STATE_RUNNING },

    { RUN_STATE_RUNNING, RUN_STATE_DEBUG },
    { RUN_STATE_RUNNING, RUN_STATE_INTERNAL_ERROR },
    { RUN_STATE_RUNNING, RUN_STATE_IO_ERROR },
    { RUN_STATE_RUNNING, RUN_STATE_PAUSED },
    { RUN_STATE_RUNNING, RUN_STATE_FINISH_MIGRATE },
    { RUN_STATE_RUNNING, RUN_STATE_RESTORE_VM },
    { RUN_STATE_RUNNING, RUN_STATE_SAVE_VM },
    { RUN_STATE_RUNNING, RUN_STATE_SHUTDOWN },
    { RUN_STATE_RUNNING, RUN_STATE_WATCHDOG },
    { RUN_STATE_RUNNING, RUN_STATE_GUEST_PANICKED },

    { RUN_STATE_SAVE_VM, RUN_STATE_RUNNING },

    { RUN_STATE_SHUTDOWN, RUN_STATE_PAUSED },
    { RUN_STATE_SHUTDOWN, RUN_STATE_FINISH_MIGRATE },

    { RUN_STATE_DEBUG, RUN_STATE_SUSPENDED },
    { RUN_STATE_RUNNING, RUN_STATE_SUSPENDED },
    { RUN_STATE_SUSPENDED, RUN_STATE_RUNNING },
    { RUN_STATE_SUSPENDED, RUN_STATE_FINISH_MIGRATE },

    { RUN_STATE_WATCHDOG, RUN_STATE_RUNNING },
    { RUN_STATE_WATCHDOG, RUN_STATE_FINISH_MIGRATE },

    { RUN_STATE_GUEST_PANICKED, RUN_STATE_PAUSED },
    { RUN_STATE_GUEST_PANICKED, RUN_STATE_FINISH_MIGRATE },
    { RUN_STATE_GUEST_PANICKED, RUN_STATE_DEBUG },

    { RUN_STATE_MAX, RUN_STATE_MAX },
};

static bool runstate_valid_transitions[RUN_STATE_MAX][RUN_STATE_MAX];

bool runstate_check(RunState state)
{
    return current_run_state == state;
}

static void runstate_init(void)
{
    const RunStateTransition *p;

    memset(&runstate_valid_transitions, 0, sizeof(runstate_valid_transitions));

    for (p = &runstate_transitions_def[0]; p->from != RUN_STATE_MAX; p++) {
        runstate_valid_transitions[p->from][p->to] = true;
    }
}

/* This function will abort() on invalid state transitions */
void runstate_set(RunState new_state)
{
    assert(new_state < RUN_STATE_MAX);

    if (!runstate_valid_transitions[current_run_state][new_state]) {
        fprintf(stderr, "ERROR: invalid runstate transition: '%s' -> '%s'\n",
                RunState_lookup[current_run_state],
                RunState_lookup[new_state]);
        abort();
    }
    trace_runstate_set(new_state);
    current_run_state = new_state;
}

int runstate_is_running(void)
{
    return runstate_check(RUN_STATE_RUNNING);
}

bool runstate_needs_reset(void)
{
    return runstate_check(RUN_STATE_INTERNAL_ERROR) ||
        runstate_check(RUN_STATE_SHUTDOWN) ||
        runstate_check(RUN_STATE_GUEST_PANICKED);
}

StatusInfo *qmp_query_status(Error **errp)
{
    StatusInfo *info = g_malloc0(sizeof(*info));

    info->running = runstate_is_running();
    info->singlestep = singlestep;
    info->status = current_run_state;

    return info;
}

/***********************************************************/
/* real time host monotonic timer */

/***********************************************************/
/* host time/date access */
void qemu_get_timedate(struct tm *tm, int offset)
{
    time_t ti;

    time(&ti);
    ti += offset;
    if (rtc_date_offset == -1) {
        if (rtc_utc)
            gmtime_r(&ti, tm);
        else
            localtime_r(&ti, tm);
    } else {
        ti -= rtc_date_offset;
        gmtime_r(&ti, tm);
    }
}

int qemu_timedate_diff(struct tm *tm)
{
    time_t seconds;

    if (rtc_date_offset == -1)
        if (rtc_utc)
            seconds = mktimegm(tm);
        else {
            struct tm tmp = *tm;
            tmp.tm_isdst = -1; /* use timezone to figure it out */
            seconds = mktime(&tmp);
	}
    else
        seconds = mktimegm(tm) + rtc_date_offset;

    return seconds - time(NULL);
}

void rtc_change_mon_event(struct tm *tm)
{
    QObject *data;

    data = qobject_from_jsonf("{ 'offset': %d }", qemu_timedate_diff(tm));
    monitor_protocol_event(QEVENT_RTC_CHANGE, data);
    qobject_decref(data);
}

static void configure_rtc_date_offset(const char *startdate, int legacy)
{
    time_t rtc_start_date;
    struct tm tm;

    if (!strcmp(startdate, "now") && legacy) {
        rtc_date_offset = -1;
    } else {
        if (sscanf(startdate, "%d-%d-%dT%d:%d:%d",
                   &tm.tm_year,
                   &tm.tm_mon,
                   &tm.tm_mday,
                   &tm.tm_hour,
                   &tm.tm_min,
                   &tm.tm_sec) == 6) {
            /* OK */
        } else if (sscanf(startdate, "%d-%d-%d",
                          &tm.tm_year,
                          &tm.tm_mon,
                          &tm.tm_mday) == 3) {
            tm.tm_hour = 0;
            tm.tm_min = 0;
            tm.tm_sec = 0;
        } else {
            goto date_fail;
        }
        tm.tm_year -= 1900;
        tm.tm_mon--;
        rtc_start_date = mktimegm(&tm);
        if (rtc_start_date == -1) {
        date_fail:
            fprintf(stderr, "Invalid date format. Valid formats are:\n"
                            "'2006-06-17T16:01:21' or '2006-06-17'\n");
            exit(1);
        }
        rtc_date_offset = time(NULL) - rtc_start_date;
    }
}

static void configure_rtc(QemuOpts *opts)
{
    const char *value;

    value = qemu_opt_get(opts, "base");
    if (value) {
        if (!strcmp(value, "utc")) {
            rtc_utc = 1;
        } else if (!strcmp(value, "localtime")) {
            rtc_utc = 0;
        } else {
            configure_rtc_date_offset(value, 0);
        }
    }
    value = qemu_opt_get(opts, "clock");
    if (value) {
        if (!strcmp(value, "host")) {
            rtc_clock = host_clock;
        } else if (!strcmp(value, "rt")) {
            rtc_clock = rt_clock;
        } else if (!strcmp(value, "vm")) {
            rtc_clock = vm_clock;
        } else {
            fprintf(stderr, "qemu: invalid option value '%s'\n", value);
            exit(1);
        }
    }
    value = qemu_opt_get(opts, "driftfix");
    if (value) {
        if (!strcmp(value, "slew")) {
            static GlobalProperty slew_lost_ticks[] = {
                {
                    .driver   = "mc146818rtc",
                    .property = "lost_tick_policy",
                    .value    = "slew",
                },
                { /* end of list */ }
            };

            qdev_prop_register_global_list(slew_lost_ticks);
        } else if (!strcmp(value, "none")) {
            /* discard is default */
        } else {
            fprintf(stderr, "qemu: invalid option value '%s'\n", value);
            exit(1);
        }
    }
}

/***********************************************************/
/* Bluetooth support */
static int nb_hcis;
static int cur_hci;
static struct HCIInfo *hci_table[MAX_NICS];

static struct bt_vlan_s {
    struct bt_scatternet_s net;
    int id;
    struct bt_vlan_s *next;
} *first_bt_vlan;

/* find or alloc a new bluetooth "VLAN" */
static struct bt_scatternet_s *qemu_find_bt_vlan(int id)
{
    struct bt_vlan_s **pvlan, *vlan;
    for (vlan = first_bt_vlan; vlan != NULL; vlan = vlan->next) {
        if (vlan->id == id)
            return &vlan->net;
    }
    vlan = g_malloc0(sizeof(struct bt_vlan_s));
    vlan->id = id;
    pvlan = &first_bt_vlan;
    while (*pvlan != NULL)
        pvlan = &(*pvlan)->next;
    *pvlan = vlan;
    return &vlan->net;
}

static void null_hci_send(struct HCIInfo *hci, const uint8_t *data, int len)
{
}

static int null_hci_addr_set(struct HCIInfo *hci, const uint8_t *bd_addr)
{
    return -ENOTSUP;
}

static struct HCIInfo null_hci = {
    .cmd_send = null_hci_send,
    .sco_send = null_hci_send,
    .acl_send = null_hci_send,
    .bdaddr_set = null_hci_addr_set,
};

struct HCIInfo *qemu_next_hci(void)
{
    if (cur_hci == nb_hcis)
        return &null_hci;

    return hci_table[cur_hci++];
}

static struct HCIInfo *hci_init(const char *str)
{
    char *endp;
    struct bt_scatternet_s *vlan = 0;

    if (!strcmp(str, "null"))
        /* null */
        return &null_hci;
    else if (!strncmp(str, "host", 4) && (str[4] == '\0' || str[4] == ':'))
        /* host[:hciN] */
        return bt_host_hci(str[4] ? str + 5 : "hci0");
    else if (!strncmp(str, "hci", 3)) {
        /* hci[,vlan=n] */
        if (str[3]) {
            if (!strncmp(str + 3, ",vlan=", 6)) {
                vlan = qemu_find_bt_vlan(strtol(str + 9, &endp, 0));
                if (*endp)
                    vlan = 0;
            }
        } else
            vlan = qemu_find_bt_vlan(0);
        if (vlan)
           return bt_new_hci(vlan);
    }

    fprintf(stderr, "qemu: Unknown bluetooth HCI `%s'.\n", str);

    return 0;
}

static int bt_hci_parse(const char *str)
{
    struct HCIInfo *hci;
    bdaddr_t bdaddr;

    if (nb_hcis >= MAX_NICS) {
        fprintf(stderr, "qemu: Too many bluetooth HCIs (max %i).\n", MAX_NICS);
        return -1;
    }

    hci = hci_init(str);
    if (!hci)
        return -1;

    bdaddr.b[0] = 0x52;
    bdaddr.b[1] = 0x54;
    bdaddr.b[2] = 0x00;
    bdaddr.b[3] = 0x12;
    bdaddr.b[4] = 0x34;
    bdaddr.b[5] = 0x56 + nb_hcis;
    hci->bdaddr_set(hci, bdaddr.b);

    hci_table[nb_hcis++] = hci;

    return 0;
}

static void bt_vhci_add(int vlan_id)
{
    struct bt_scatternet_s *vlan = qemu_find_bt_vlan(vlan_id);

    if (!vlan->slave)
        fprintf(stderr, "qemu: warning: adding a VHCI to "
                        "an empty scatternet %i\n", vlan_id);

    bt_vhci_init(bt_new_hci(vlan));
}

static struct bt_device_s *bt_device_add(const char *opt)
{
    struct bt_scatternet_s *vlan;
    int vlan_id = 0;
    char *endp = strstr(opt, ",vlan=");
    int len = (endp ? endp - opt : strlen(opt)) + 1;
    char devname[10];

    pstrcpy(devname, MIN(sizeof(devname), len), opt);

    if (endp) {
        vlan_id = strtol(endp + 6, &endp, 0);
        if (*endp) {
            fprintf(stderr, "qemu: unrecognised bluetooth vlan Id\n");
            return 0;
        }
    }

    vlan = qemu_find_bt_vlan(vlan_id);

    if (!vlan->slave)
        fprintf(stderr, "qemu: warning: adding a slave device to "
                        "an empty scatternet %i\n", vlan_id);

    if (!strcmp(devname, "keyboard"))
        return bt_keyboard_init(vlan);

    fprintf(stderr, "qemu: unsupported bluetooth device `%s'\n", devname);
    return 0;
}

static int bt_parse(const char *opt)
{
    const char *endp, *p;
    int vlan;

    if (strstart(opt, "hci", &endp)) {
        if (!*endp || *endp == ',') {
            if (*endp)
                if (!strstart(endp, ",vlan=", 0))
                    opt = endp + 1;

            return bt_hci_parse(opt);
       }
    } else if (strstart(opt, "vhci", &endp)) {
        if (!*endp || *endp == ',') {
            if (*endp) {
                if (strstart(endp, ",vlan=", &p)) {
                    vlan = strtol(p, (char **) &endp, 0);
                    if (*endp) {
                        fprintf(stderr, "qemu: bad scatternet '%s'\n", p);
                        return 1;
                    }
                } else {
                    fprintf(stderr, "qemu: bad parameter '%s'\n", endp + 1);
                    return 1;
                }
            } else
                vlan = 0;

            bt_vhci_add(vlan);
            return 0;
        }
    } else if (strstart(opt, "device:", &endp))
        return !bt_device_add(endp);

    fprintf(stderr, "qemu: bad bluetooth parameter '%s'\n", opt);
    return 1;
}

static int parse_sandbox(QemuOpts *opts, void *opaque)
{
    /* FIXME: change this to true for 1.3 */
    if (qemu_opt_get_bool(opts, "enable", false)) {
#ifdef CONFIG_SECCOMP
        if (seccomp_start() < 0) {
            qerror_report(ERROR_CLASS_GENERIC_ERROR,
                          "failed to install seccomp syscall filter in the kernel");
            return -1;
        }
#else
        qerror_report(ERROR_CLASS_GENERIC_ERROR,
                      "sandboxing request but seccomp is not compiled into this build");
        return -1;
#endif
    }

    return 0;
}

/*********QEMU USB setting******/
bool usb_enabled(bool default_usb)
{
    QemuOpts *mach_opts;
    mach_opts = qemu_opts_find(qemu_find_opts("machine"), 0);
    if (mach_opts) {
        return qemu_opt_get_bool(mach_opts, "usb", default_usb);
    }
    return default_usb;
}

#ifndef _WIN32
static int parse_add_fd(QemuOpts *opts, void *opaque)
{
    int fd, dupfd, flags;
    int64_t fdset_id;
    const char *fd_opaque = NULL;

    fd = qemu_opt_get_number(opts, "fd", -1);
    fdset_id = qemu_opt_get_number(opts, "set", -1);
    fd_opaque = qemu_opt_get(opts, "opaque");

    if (fd < 0) {
        qerror_report(ERROR_CLASS_GENERIC_ERROR,
                      "fd option is required and must be non-negative");
        return -1;
    }

    if (fd <= STDERR_FILENO) {
        qerror_report(ERROR_CLASS_GENERIC_ERROR,
                      "fd cannot be a standard I/O stream");
        return -1;
    }

    /*
     * All fds inherited across exec() necessarily have FD_CLOEXEC
     * clear, while qemu sets FD_CLOEXEC on all other fds used internally.
     */
    flags = fcntl(fd, F_GETFD);
    if (flags == -1 || (flags & FD_CLOEXEC)) {
        qerror_report(ERROR_CLASS_GENERIC_ERROR,
                      "fd is not valid or already in use");
        return -1;
    }

    if (fdset_id < 0) {
        qerror_report(ERROR_CLASS_GENERIC_ERROR,
                      "set option is required and must be non-negative");
        return -1;
    }

#ifdef F_DUPFD_CLOEXEC
    dupfd = fcntl(fd, F_DUPFD_CLOEXEC, 0);
#else
    dupfd = dup(fd);
    if (dupfd != -1) {
        qemu_set_cloexec(dupfd);
    }
#endif
    if (dupfd == -1) {
        qerror_report(ERROR_CLASS_GENERIC_ERROR,
                      "Error duplicating fd: %s", strerror(errno));
        return -1;
    }

    /* add the duplicate fd, and optionally the opaque string, to the fd set */
    monitor_fdset_add_fd(dupfd, true, fdset_id, fd_opaque ? true : false,
                         fd_opaque, NULL);

    return 0;
}

static int cleanup_add_fd(QemuOpts *opts, void *opaque)
{
    int fd;

    fd = qemu_opt_get_number(opts, "fd", -1);
    close(fd);

    return 0;
}
#endif

/***********************************************************/
/* QEMU Block devices */

#define HD_OPTS "media=disk"
#define CDROM_OPTS "media=cdrom"
#define FD_OPTS ""
#define PFLASH_OPTS ""
#define MTD_OPTS ""
#define SD_OPTS ""

static int drive_init_func(QemuOpts *opts, void *opaque)
{
    BlockInterfaceType *block_default_type = opaque;

    return drive_init(opts, *block_default_type) == NULL;
}

static int drive_enable_snapshot(QemuOpts *opts, void *opaque)
{
    if (NULL == qemu_opt_get(opts, "snapshot")) {
        qemu_opt_set(opts, "snapshot", "on");
    }
    return 0;
}

static void default_drive(int enable, int snapshot, BlockInterfaceType type,
                          int index, const char *optstr)
{
    QemuOpts *opts;

    if (!enable || drive_get_by_index(type, index)) {
        return;
    }

    opts = drive_add(type, index, NULL, optstr);
    if (snapshot) {
        drive_enable_snapshot(opts, NULL);
    }
    if (!drive_init(opts, type)) {
        exit(1);
    }
}

void qemu_register_boot_set(QEMUBootSetHandler *func, void *opaque)
{
    boot_set_handler = func;
    boot_set_opaque = opaque;
}

int qemu_boot_set(const char *boot_devices)
{
    if (!boot_set_handler) {
        return -EINVAL;
    }
    return boot_set_handler(boot_set_opaque, boot_devices);
}

static void validate_bootdevices(char *devices)
{
    /* We just do some generic consistency checks */
    const char *p;
    int bitmap = 0;

    for (p = devices; *p != '\0'; p++) {
        /* Allowed boot devices are:
         * a-b: floppy disk drives
         * c-f: IDE disk drives
         * g-m: machine implementation dependent drives
         * n-p: network devices
         * It's up to each machine implementation to check if the given boot
         * devices match the actual hardware implementation and firmware
         * features.
         */
        if (*p < 'a' || *p > 'p') {
            fprintf(stderr, "Invalid boot device '%c'\n", *p);
            exit(1);
        }
        if (bitmap & (1 << (*p - 'a'))) {
            fprintf(stderr, "Boot device '%c' was given twice\n", *p);
            exit(1);
        }
        bitmap |= 1 << (*p - 'a');
    }
}

static void restore_boot_devices(void *opaque)
{
    char *standard_boot_devices = opaque;
    static int first = 1;

    /* Restore boot order and remove ourselves after the first boot */
    if (first) {
        first = 0;
        return;
    }

    qemu_boot_set(standard_boot_devices);

    qemu_unregister_reset(restore_boot_devices, standard_boot_devices);
    g_free(standard_boot_devices);
}

void add_boot_device_path(int32_t bootindex, DeviceState *dev,
                          const char *suffix)
{
    FWBootEntry *node, *i;

    if (bootindex < 0) {
        return;
    }

    assert(dev != NULL || suffix != NULL);

    node = g_malloc0(sizeof(FWBootEntry));
    node->bootindex = bootindex;
    node->suffix = g_strdup(suffix);
    node->dev = dev;

    QTAILQ_FOREACH(i, &fw_boot_order, link) {
        if (i->bootindex == bootindex) {
            fprintf(stderr, "Two devices with same boot index %d\n", bootindex);
            exit(1);
        } else if (i->bootindex < bootindex) {
            continue;
        }
        QTAILQ_INSERT_BEFORE(i, node, link);
        return;
    }
    QTAILQ_INSERT_TAIL(&fw_boot_order, node, link);
}

DeviceState *get_boot_device(uint32_t position)
{
    uint32_t counter = 0;
    FWBootEntry *i = NULL;
    DeviceState *res = NULL;

    if (!QTAILQ_EMPTY(&fw_boot_order)) {
        QTAILQ_FOREACH(i, &fw_boot_order, link) {
            if (counter == position) {
                res = i->dev;
                break;
            }
            counter++;
        }
    }
    return res;
}

/*
 * This function returns null terminated string that consist of new line
 * separated device paths.
 *
 * memory pointed by "size" is assigned total length of the array in bytes
 *
 */
char *get_boot_devices_list(size_t *size)
{
    FWBootEntry *i;
    size_t total = 0;
    char *list = NULL;

    QTAILQ_FOREACH(i, &fw_boot_order, link) {
        char *devpath = NULL, *bootpath;
        size_t len;

        if (i->dev) {
            devpath = qdev_get_fw_dev_path(i->dev);
            assert(devpath);
        }

        if (i->suffix && devpath) {
            size_t bootpathlen = strlen(devpath) + strlen(i->suffix) + 1;

            bootpath = g_malloc(bootpathlen);
            snprintf(bootpath, bootpathlen, "%s%s", devpath, i->suffix);
            g_free(devpath);
        } else if (devpath) {
            bootpath = devpath;
        } else {
            assert(i->suffix);
            bootpath = g_strdup(i->suffix);
        }

        if (total) {
            list[total-1] = '\n';
        }
        len = strlen(bootpath) + 1;
        list = g_realloc(list, total + len);
        memcpy(&list[total], bootpath, len);
        total += len;
        g_free(bootpath);
    }

    *size = total;

    if (boot_strict && *size > 0) {
        list[total-1] = '\n';
        list = g_realloc(list, total + 5);
        memcpy(&list[total], "HALT", 5);
        *size = total + 5;
    }
    return list;
}

static void numa_node_parse_cpus(int nodenr, const char *cpus)
{
    char *endptr;
    unsigned long long value, endvalue;

    /* Empty CPU range strings will be considered valid, they will simply
     * not set any bit in the CPU bitmap.
     */
    if (!*cpus) {
        return;
    }

    if (parse_uint(cpus, &value, &endptr, 10) < 0) {
        goto error;
    }
    if (*endptr == '-') {
        if (parse_uint_full(endptr + 1, &endvalue, 10) < 0) {
            goto error;
        }
    } else if (*endptr == '\0') {
        endvalue = value;
    } else {
        goto error;
    }

    if (endvalue >= MAX_CPUMASK_BITS) {
        endvalue = MAX_CPUMASK_BITS - 1;
        fprintf(stderr,
            "qemu: NUMA: A max of %d VCPUs are supported\n",
             MAX_CPUMASK_BITS);
    }

    if (endvalue < value) {
        goto error;
    }

    bitmap_set(node_cpumask[nodenr], value, endvalue-value+1);
    return;

error:
    fprintf(stderr, "qemu: Invalid NUMA CPU range: %s\n", cpus);
    exit(1);
}

static void numa_add(const char *optarg)
{
    char option[128];
    char *endptr;
    unsigned long long nodenr;

    optarg = get_opt_name(option, 128, optarg, ',');
    if (*optarg == ',') {
        optarg++;
    }
    if (!strcmp(option, "node")) {

        if (nb_numa_nodes >= MAX_NODES) {
            fprintf(stderr, "qemu: too many NUMA nodes\n");
            exit(1);
        }

        if (get_param_value(option, 128, "nodeid", optarg) == 0) {
            nodenr = nb_numa_nodes;
        } else {
            if (parse_uint_full(option, &nodenr, 10) < 0) {
                fprintf(stderr, "qemu: Invalid NUMA nodeid: %s\n", option);
                exit(1);
            }
        }

        if (nodenr >= MAX_NODES) {
            fprintf(stderr, "qemu: invalid NUMA nodeid: %llu\n", nodenr);
            exit(1);
        }

        if (get_param_value(option, 128, "mem", optarg) == 0) {
            node_mem[nodenr] = 0;
        } else {
            int64_t sval;
            sval = strtosz(option, &endptr);
            if (sval < 0 || *endptr) {
                fprintf(stderr, "qemu: invalid numa mem size: %s\n", optarg);
                exit(1);
            }
            node_mem[nodenr] = sval;
        }
        if (get_param_value(option, 128, "cpus", optarg) != 0) {
            numa_node_parse_cpus(nodenr, option);
        }
        nb_numa_nodes++;
    } else {
        fprintf(stderr, "Invalid -numa option: %s\n", option);
        exit(1);
    }
}

static void smp_parse(const char *optarg)
{
    int smp, sockets = 0, threads = 0, cores = 0;
    char *endptr;
    char option[128];

    smp = strtoul(optarg, &endptr, 10);
    if (endptr != optarg) {
        if (*endptr == ',') {
            endptr++;
        }
    }
    if (get_param_value(option, 128, "sockets", endptr) != 0)
        sockets = strtoull(option, NULL, 10);
    if (get_param_value(option, 128, "cores", endptr) != 0)
        cores = strtoull(option, NULL, 10);
    if (get_param_value(option, 128, "threads", endptr) != 0)
        threads = strtoull(option, NULL, 10);
    if (get_param_value(option, 128, "maxcpus", endptr) != 0)
        max_cpus = strtoull(option, NULL, 10);

    /* compute missing values, prefer sockets over cores over threads */
    if (smp == 0 || sockets == 0) {
        sockets = sockets > 0 ? sockets : 1;
        cores = cores > 0 ? cores : 1;
        threads = threads > 0 ? threads : 1;
        if (smp == 0) {
            smp = cores * threads * sockets;
        }
    } else {
        if (cores == 0) {
            threads = threads > 0 ? threads : 1;
            cores = smp / (sockets * threads);
        } else {
            threads = smp / (cores * sockets);
        }
    }
    smp_cpus = smp;
    smp_cores = cores > 0 ? cores : 1;
    smp_threads = threads > 0 ? threads : 1;
    if (max_cpus == 0)
        max_cpus = smp_cpus;
}

static void configure_realtime(QemuOpts *opts)
{
    bool enable_mlock;

    enable_mlock = qemu_opt_get_bool(opts, "mlock", true);

    if (enable_mlock) {
        if (os_mlock() < 0) {
            fprintf(stderr, "qemu: locking memory failed\n");
            exit(1);
        }
    }
}

/***********************************************************/
/* USB devices */

static int usb_device_add(const char *devname)
{
    const char *p;
    USBDevice *dev = NULL;

    if (!usb_enabled(false)) {
        return -1;
    }

    /* drivers with .usbdevice_name entry in USBDeviceInfo */
    dev = usbdevice_create(devname);
    if (dev)
        goto done;

    /* the other ones */
#ifndef CONFIG_LINUX
    /* only the linux version is qdev-ified, usb-bsd still needs this */
    if (strstart(devname, "host:", &p)) {
        dev = usb_host_device_open(usb_bus_find(-1), p);
    } else
#endif
    if (!strcmp(devname, "bt") || strstart(devname, "bt:", &p)) {
        dev = usb_bt_init(usb_bus_find(-1),
                          devname[2] ? hci_init(p)
                                     : bt_new_hci(qemu_find_bt_vlan(0)));
    } else {
        return -1;
    }
    if (!dev)
        return -1;

done:
    return 0;
}

static int usb_device_del(const char *devname)
{
    int bus_num, addr;
    const char *p;

    if (strstart(devname, "host:", &p)) {
        return -1;
    }

    if (!usb_enabled(false)) {
        return -1;
    }

    p = strchr(devname, '.');
    if (!p)
        return -1;
    bus_num = strtoul(devname, NULL, 0);
    addr = strtoul(p + 1, NULL, 0);

    return usb_device_delete_addr(bus_num, addr);
}

static int usb_parse(const char *cmdline)
{
    int r;
    r = usb_device_add(cmdline);
    if (r < 0) {
        fprintf(stderr, "qemu: could not add USB device '%s'\n", cmdline);
    }
    return r;
}

void do_usb_add(Monitor *mon, const QDict *qdict)
{
    const char *devname = qdict_get_str(qdict, "devname");
    if (usb_device_add(devname) < 0) {
        error_report("could not add USB device '%s'", devname);
    }
}

void do_usb_del(Monitor *mon, const QDict *qdict)
{
    const char *devname = qdict_get_str(qdict, "devname");
    if (usb_device_del(devname) < 0) {
        error_report("could not delete USB device '%s'", devname);
    }
}

/***********************************************************/
/* PCMCIA/Cardbus */

static struct pcmcia_socket_entry_s {
    PCMCIASocket *socket;
    struct pcmcia_socket_entry_s *next;
} *pcmcia_sockets = 0;

void pcmcia_socket_register(PCMCIASocket *socket)
{
    struct pcmcia_socket_entry_s *entry;

    entry = g_malloc(sizeof(struct pcmcia_socket_entry_s));
    entry->socket = socket;
    entry->next = pcmcia_sockets;
    pcmcia_sockets = entry;
}

void pcmcia_socket_unregister(PCMCIASocket *socket)
{
    struct pcmcia_socket_entry_s *entry, **ptr;

    ptr = &pcmcia_sockets;
    for (entry = *ptr; entry; ptr = &entry->next, entry = *ptr)
        if (entry->socket == socket) {
            *ptr = entry->next;
            g_free(entry);
        }
}

void pcmcia_info(Monitor *mon, const QDict *qdict)
{
    struct pcmcia_socket_entry_s *iter;

    if (!pcmcia_sockets)
        monitor_printf(mon, "No PCMCIA sockets\n");

    for (iter = pcmcia_sockets; iter; iter = iter->next)
        monitor_printf(mon, "%s: %s\n", iter->socket->slot_string,
                       iter->socket->attached ? iter->socket->card_string :
                       "Empty");
}

/***********************************************************/
/* machine registration */

static QEMUMachine *first_machine = NULL;
QEMUMachine *current_machine = NULL;

int qemu_register_machine(QEMUMachine *m)
{
    QEMUMachine **pm;
    pm = &first_machine;
    while (*pm != NULL)
        pm = &(*pm)->next;
    m->next = NULL;
    *pm = m;
    return 0;
}

static QEMUMachine *find_machine(const char *name)
{
    QEMUMachine *m;

    for(m = first_machine; m != NULL; m = m->next) {
        if (!strcmp(m->name, name))
            return m;
        if (m->alias && !strcmp(m->alias, name))
            return m;
    }
    return NULL;
}

QEMUMachine *find_default_machine(void)
{
    QEMUMachine *m;

    for(m = first_machine; m != NULL; m = m->next) {
        if (m->is_default) {
            return m;
        }
    }
    return NULL;
}

MachineInfoList *qmp_query_machines(Error **errp)
{
    MachineInfoList *mach_list = NULL;
    QEMUMachine *m;

    for (m = first_machine; m; m = m->next) {
        MachineInfoList *entry;
        MachineInfo *info;

        info = g_malloc0(sizeof(*info));
        if (m->is_default) {
            info->has_is_default = true;
            info->is_default = true;
        }

        if (m->alias) {
            info->has_alias = true;
            info->alias = g_strdup(m->alias);
        }

        info->name = g_strdup(m->name);
        info->cpu_max = !m->max_cpus ? 1 : m->max_cpus;

        entry = g_malloc0(sizeof(*entry));
        entry->value = info;
        entry->next = mach_list;
        mach_list = entry;
    }

    return mach_list;
}

/***********************************************************/
/* main execution loop */

struct vm_change_state_entry {
    VMChangeStateHandler *cb;
    void *opaque;
    QLIST_ENTRY (vm_change_state_entry) entries;
};

static QLIST_HEAD(vm_change_state_head, vm_change_state_entry) vm_change_state_head;

VMChangeStateEntry *qemu_add_vm_change_state_handler(VMChangeStateHandler *cb,
                                                     void *opaque)
{
    VMChangeStateEntry *e;

    e = g_malloc0(sizeof (*e));

    e->cb = cb;
    e->opaque = opaque;
    QLIST_INSERT_HEAD(&vm_change_state_head, e, entries);
    return e;
}

void qemu_del_vm_change_state_handler(VMChangeStateEntry *e)
{
    QLIST_REMOVE (e, entries);
    g_free (e);
}

void vm_state_notify(int running, RunState state)
{
    VMChangeStateEntry *e;

    trace_vm_state_notify(running, state);

    for (e = vm_change_state_head.lh_first; e; e = e->entries.le_next) {
        e->cb(e->opaque, running, state);
    }
}

void vm_start(void)
{
    if (!runstate_is_running()) {
        cpu_enable_ticks();
        runstate_set(RUN_STATE_RUNNING);
        vm_state_notify(1, RUN_STATE_RUNNING);
        resume_all_vcpus();
        monitor_protocol_event(QEVENT_RESUME, NULL);
    }
}

/* reset/shutdown handler */

typedef struct QEMUResetEntry {
    QTAILQ_ENTRY(QEMUResetEntry) entry;
    QEMUResetHandler *func;
    void *opaque;
} QEMUResetEntry;

static QTAILQ_HEAD(reset_handlers, QEMUResetEntry) reset_handlers =
    QTAILQ_HEAD_INITIALIZER(reset_handlers);
static int reset_requested;
static int shutdown_requested, shutdown_signal = -1;
static pid_t shutdown_pid;
static int powerdown_requested;
static int debug_requested;
static int suspend_requested;
static int wakeup_requested;
static NotifierList powerdown_notifiers =
    NOTIFIER_LIST_INITIALIZER(powerdown_notifiers);
static NotifierList suspend_notifiers =
    NOTIFIER_LIST_INITIALIZER(suspend_notifiers);
static NotifierList wakeup_notifiers =
    NOTIFIER_LIST_INITIALIZER(wakeup_notifiers);
static uint32_t wakeup_reason_mask = ~0;
static RunState vmstop_requested = RUN_STATE_MAX;

int qemu_shutdown_requested_get(void)
{
    return shutdown_requested;
}

int qemu_reset_requested_get(void)
{
    return reset_requested;
}

static int qemu_shutdown_requested(void)
{
    int r = shutdown_requested;
    shutdown_requested = 0;
    return r;
}

static void qemu_kill_report(void)
{
    if (!qtest_enabled() && shutdown_signal != -1) {
        fprintf(stderr, "qemu: terminating on signal %d", shutdown_signal);
        if (shutdown_pid == 0) {
            /* This happens for eg ^C at the terminal, so it's worth
             * avoiding printing an odd message in that case.
             */
            fputc('\n', stderr);
        } else {
            fprintf(stderr, " from pid " FMT_pid "\n", shutdown_pid);
        }
        shutdown_signal = -1;
    }
}

static int qemu_reset_requested(void)
{
    int r = reset_requested;
    reset_requested = 0;
    return r;
}

static int qemu_suspend_requested(void)
{
    int r = suspend_requested;
    suspend_requested = 0;
    return r;
}

static int qemu_wakeup_requested(void)
{
    int r = wakeup_requested;
    wakeup_requested = 0;
    return r;
}

static int qemu_powerdown_requested(void)
{
    int r = powerdown_requested;
    powerdown_requested = 0;
    return r;
}

static int qemu_debug_requested(void)
{
    int r = debug_requested;
    debug_requested = 0;
    return r;
}

/* We use RUN_STATE_MAX but any invalid value will do */
static bool qemu_vmstop_requested(RunState *r)
{
    if (vmstop_requested < RUN_STATE_MAX) {
        *r = vmstop_requested;
        vmstop_requested = RUN_STATE_MAX;
        return true;
    }

    return false;
}

void qemu_register_reset(QEMUResetHandler *func, void *opaque)
{
    QEMUResetEntry *re = g_malloc0(sizeof(QEMUResetEntry));

    re->func = func;
    re->opaque = opaque;
    QTAILQ_INSERT_TAIL(&reset_handlers, re, entry);
}

void qemu_unregister_reset(QEMUResetHandler *func, void *opaque)
{
    QEMUResetEntry *re;

    QTAILQ_FOREACH(re, &reset_handlers, entry) {
        if (re->func == func && re->opaque == opaque) {
            QTAILQ_REMOVE(&reset_handlers, re, entry);
            g_free(re);
            return;
        }
    }
}

void qemu_devices_reset(void)
{
    QEMUResetEntry *re, *nre;

    /* reset all devices */
    QTAILQ_FOREACH_SAFE(re, &reset_handlers, entry, nre) {
        re->func(re->opaque);
    }
}

void qemu_system_reset(bool report)
{
    if (current_machine && current_machine->reset) {
        current_machine->reset();
    } else {
        qemu_devices_reset();
    }
    if (report) {
        monitor_protocol_event(QEVENT_RESET, NULL);
    }
    cpu_synchronize_all_post_reset();
}

void qemu_system_reset_request(void)
{
    if (no_reboot) {
        shutdown_requested = 1;
    } else {
        reset_requested = 1;
    }
    cpu_stop_current();
    qemu_notify_event();
}

static void qemu_system_suspend(void)
{
    pause_all_vcpus();
    notifier_list_notify(&suspend_notifiers, NULL);
    runstate_set(RUN_STATE_SUSPENDED);
    monitor_protocol_event(QEVENT_SUSPEND, NULL);
}

void qemu_system_suspend_request(void)
{
    if (runstate_check(RUN_STATE_SUSPENDED)) {
        return;
    }
    suspend_requested = 1;
    cpu_stop_current();
    qemu_notify_event();
}

void qemu_register_suspend_notifier(Notifier *notifier)
{
    notifier_list_add(&suspend_notifiers, notifier);
}

void qemu_system_wakeup_request(WakeupReason reason)
{
    if (!runstate_check(RUN_STATE_SUSPENDED)) {
        return;
    }
    if (!(wakeup_reason_mask & (1 << reason))) {
        return;
    }
    runstate_set(RUN_STATE_RUNNING);
    notifier_list_notify(&wakeup_notifiers, &reason);
    wakeup_requested = 1;
    qemu_notify_event();
}

void qemu_system_wakeup_enable(WakeupReason reason, bool enabled)
{
    if (enabled) {
        wakeup_reason_mask |= (1 << reason);
    } else {
        wakeup_reason_mask &= ~(1 << reason);
    }
}

void qemu_register_wakeup_notifier(Notifier *notifier)
{
    notifier_list_add(&wakeup_notifiers, notifier);
}

void qemu_system_killed(int signal, pid_t pid)
{
    shutdown_signal = signal;
    shutdown_pid = pid;
    no_shutdown = 0;
    qemu_system_shutdown_request();
}

void qemu_system_shutdown_request(void)
{
    shutdown_requested = 1;
    qemu_notify_event();
}

static void qemu_system_powerdown(void)
{
    monitor_protocol_event(QEVENT_POWERDOWN, NULL);
    notifier_list_notify(&powerdown_notifiers, NULL);
}

void qemu_system_powerdown_request(void)
{
    powerdown_requested = 1;
    qemu_notify_event();
}

void qemu_register_powerdown_notifier(Notifier *notifier)
{
    notifier_list_add(&powerdown_notifiers, notifier);
}

void qemu_system_debug_request(void)
{
    debug_requested = 1;
    qemu_notify_event();
}

void qemu_system_vmstop_request(RunState state)
{
    vmstop_requested = state;
    qemu_notify_event();
}

static bool main_loop_should_exit(void)
{
    RunState r;
    if (qemu_debug_requested()) {
        vm_stop(RUN_STATE_DEBUG);
    }
    if (qemu_suspend_requested()) {
        qemu_system_suspend();
    }
    if (qemu_shutdown_requested()) {
        qemu_kill_report();
        monitor_protocol_event(QEVENT_SHUTDOWN, NULL);
        if (no_shutdown) {
            vm_stop(RUN_STATE_SHUTDOWN);
        } else {
            return true;
        }
    }
    if (qemu_reset_requested()) {
        pause_all_vcpus();
        cpu_synchronize_all_states();
        qemu_system_reset(VMRESET_REPORT);
        resume_all_vcpus();
        if (runstate_needs_reset()) {
            runstate_set(RUN_STATE_PAUSED);
        }
    }
    if (qemu_wakeup_requested()) {
        pause_all_vcpus();
        cpu_synchronize_all_states();
        qemu_system_reset(VMRESET_SILENT);
        resume_all_vcpus();
        monitor_protocol_event(QEVENT_WAKEUP, NULL);
    }
    if (qemu_powerdown_requested()) {
        qemu_system_powerdown();
    }
    if (qemu_vmstop_requested(&r)) {
        vm_stop(r);
    }
    return false;
}

static void main_loop(void)
{
    bool nonblocking;
    int last_io = 0;
#ifdef CONFIG_PROFILER
    int64_t ti;
#endif
    do {
        nonblocking = !kvm_enabled() && !xen_enabled() && last_io > 0;
#ifdef CONFIG_PROFILER
        ti = profile_getclock();
#endif
        last_io = main_loop_wait(nonblocking);
#ifdef CONFIG_PROFILER
        dev_time += profile_getclock() - ti;
#endif
    } while (!main_loop_should_exit());
}

static void version(void)
{
    printf("QEMU emulator version " QEMU_VERSION QEMU_PKGVERSION ", Copyright (c) 2003-2008 Fabrice Bellard\n");
}

static void help(int exitcode)
{
    version();
    printf("usage: %s [options] [disk_image]\n\n"
           "'disk_image' is a raw hard disk image for IDE hard disk 0\n\n",
            error_get_progname());

#define QEMU_OPTIONS_GENERATE_HELP
#include "qemu-options-wrapper.h"

    printf("\nDuring emulation, the following keys are useful:\n"
           "ctrl-alt-f      toggle full screen\n"
           "ctrl-alt-n      switch to virtual console 'n'\n"
           "ctrl-alt        toggle mouse and keyboard grab\n"
           "\n"
           "When using -nographic, press 'ctrl-a h' to get some help.\n");

    exit(exitcode);
}

#define HAS_ARG 0x0001

typedef struct QEMUOption {
    const char *name;
    int flags;
    int index;
    uint32_t arch_mask;
} QEMUOption;

static const QEMUOption qemu_options[] = {
    { "h", 0, QEMU_OPTION_h, QEMU_ARCH_ALL },
#define QEMU_OPTIONS_GENERATE_OPTIONS
#include "qemu-options-wrapper.h"
    { NULL },
};

static bool vga_available(void)
{
    return object_class_by_name("VGA") || object_class_by_name("isa-vga");
}

static bool cirrus_vga_available(void)
{
    return object_class_by_name("cirrus-vga")
           || object_class_by_name("isa-cirrus-vga");
}

static bool vmware_vga_available(void)
{
    return object_class_by_name("vmware-svga");
}

static bool qxl_vga_available(void)
{
    return object_class_by_name("qxl-vga");
}

static void select_vgahw (const char *p)
{
    const char *opts;

    vga_interface_type = VGA_NONE;
    if (strstart(p, "std", &opts)) {
        if (vga_available()) {
            vga_interface_type = VGA_STD;
        } else {
            fprintf(stderr, "Error: standard VGA not available\n");
            exit(0);
        }
    } else if (strstart(p, "cirrus", &opts)) {
        if (cirrus_vga_available()) {
            vga_interface_type = VGA_CIRRUS;
        } else {
            fprintf(stderr, "Error: Cirrus VGA not available\n");
            exit(0);
        }
    } else if (strstart(p, "vmware", &opts)) {
        if (vmware_vga_available()) {
            vga_interface_type = VGA_VMWARE;
        } else {
            fprintf(stderr, "Error: VMWare SVGA not available\n");
            exit(0);
        }
    } else if (strstart(p, "xenfb", &opts)) {
        vga_interface_type = VGA_XENFB;
    } else if (strstart(p, "qxl", &opts)) {
        if (qxl_vga_available()) {
            vga_interface_type = VGA_QXL;
        } else {
            fprintf(stderr, "Error: QXL VGA not available\n");
            exit(0);
        }
    } else if (!strstart(p, "none", &opts)) {
    invalid_vga:
        fprintf(stderr, "Unknown vga type: %s\n", p);
        exit(1);
    }
    while (*opts) {
        const char *nextopt;

        if (strstart(opts, ",retrace=", &nextopt)) {
            opts = nextopt;
            if (strstart(opts, "dumb", &nextopt))
                vga_retrace_method = VGA_RETRACE_DUMB;
            else if (strstart(opts, "precise", &nextopt))
                vga_retrace_method = VGA_RETRACE_PRECISE;
            else goto invalid_vga;
        } else goto invalid_vga;
        opts = nextopt;
    }
}

static DisplayType select_display(const char *p)
{
    const char *opts;
    DisplayType display = DT_DEFAULT;

    if (strstart(p, "sdl", &opts)) {
#ifdef CONFIG_SDL
        display = DT_SDL;
        while (*opts) {
            const char *nextopt;

            if (strstart(opts, ",frame=", &nextopt)) {
                opts = nextopt;
                if (strstart(opts, "on", &nextopt)) {
                    no_frame = 0;
                } else if (strstart(opts, "off", &nextopt)) {
                    no_frame = 1;
                } else {
                    goto invalid_sdl_args;
                }
            } else if (strstart(opts, ",alt_grab=", &nextopt)) {
                opts = nextopt;
                if (strstart(opts, "on", &nextopt)) {
                    alt_grab = 1;
                } else if (strstart(opts, "off", &nextopt)) {
                    alt_grab = 0;
                } else {
                    goto invalid_sdl_args;
                }
            } else if (strstart(opts, ",ctrl_grab=", &nextopt)) {
                opts = nextopt;
                if (strstart(opts, "on", &nextopt)) {
                    ctrl_grab = 1;
                } else if (strstart(opts, "off", &nextopt)) {
                    ctrl_grab = 0;
                } else {
                    goto invalid_sdl_args;
                }
            } else if (strstart(opts, ",window_close=", &nextopt)) {
                opts = nextopt;
                if (strstart(opts, "on", &nextopt)) {
                    no_quit = 0;
                } else if (strstart(opts, "off", &nextopt)) {
                    no_quit = 1;
                } else {
                    goto invalid_sdl_args;
                }
            } else {
            invalid_sdl_args:
                fprintf(stderr, "Invalid SDL option string: %s\n", p);
                exit(1);
            }
            opts = nextopt;
        }
#else
        fprintf(stderr, "SDL support is disabled\n");
        exit(1);
#endif
    } else if (strstart(p, "vnc", &opts)) {
#ifdef CONFIG_VNC
        display_remote++;

        if (*opts) {
            const char *nextopt;

            if (strstart(opts, "=", &nextopt)) {
                vnc_display = nextopt;
            }
        }
        if (!vnc_display) {
            fprintf(stderr, "VNC requires a display argument vnc=<display>\n");
            exit(1);
        }
#else
        fprintf(stderr, "VNC support is disabled\n");
        exit(1);
#endif
    } else if (strstart(p, "curses", &opts)) {
#ifdef CONFIG_CURSES
        display = DT_CURSES;
#else
        fprintf(stderr, "Curses support is disabled\n");
        exit(1);
#endif
    } else if (strstart(p, "gtk", &opts)) {
#ifdef CONFIG_GTK
        display = DT_GTK;
#else
        fprintf(stderr, "GTK support is disabled\n");
        exit(1);
#endif
    } else if (strstart(p, "none", &opts)) {
        display = DT_NONE;
    } else {
        fprintf(stderr, "Unknown display type: %s\n", p);
        exit(1);
    }

    return display;
}

static int balloon_parse(const char *arg)
{
    QemuOpts *opts;

    if (strcmp(arg, "none") == 0) {
        return 0;
    }

    if (!strncmp(arg, "virtio", 6)) {
        if (arg[6] == ',') {
            /* have params -> parse them */
            opts = qemu_opts_parse(qemu_find_opts("device"), arg+7, 0);
            if (!opts)
                return  -1;
        } else {
            /* create empty opts */
            opts = qemu_opts_create_nofail(qemu_find_opts("device"));
        }
        qemu_opt_set(opts, "driver", "virtio-balloon");
        return 0;
    }

    return -1;
}

char *qemu_find_file(int type, const char *name)
{
    int i;
    const char *subdir;
    char *buf;

    /* Try the name as a straight path first */
    if (access(name, R_OK) == 0) {
        trace_load_file(name, name);
        return g_strdup(name);
    }

    switch (type) {
    case QEMU_FILE_TYPE_BIOS:
        subdir = "";
        break;
    case QEMU_FILE_TYPE_KEYMAP:
        subdir = "keymaps/";
        break;
    default:
        abort();
    }

    for (i = 0; i < data_dir_idx; i++) {
        buf = g_strdup_printf("%s/%s%s", data_dir[i], subdir, name);
        if (access(buf, R_OK) == 0) {
            trace_load_file(name, buf);
            return buf;
        }
        g_free(buf);
    }
    return NULL;
}

static int device_help_func(QemuOpts *opts, void *opaque)
{
    return qdev_device_help(opts);
}

static int device_init_func(QemuOpts *opts, void *opaque)
{
    DeviceState *dev;

    dev = qdev_device_add(opts);
    if (!dev)
        return -1;
    object_unref(OBJECT(dev));
    return 0;
}

static int chardev_init_func(QemuOpts *opts, void *opaque)
{
    Error *local_err = NULL;

    qemu_chr_new_from_opts(opts, NULL, &local_err);
    if (error_is_set(&local_err)) {
        fprintf(stderr, "%s\n", error_get_pretty(local_err));
        error_free(local_err);
        return -1;
    }
    return 0;
}

#ifdef CONFIG_VIRTFS
static int fsdev_init_func(QemuOpts *opts, void *opaque)
{
    int ret;
    ret = qemu_fsdev_add(opts);

    return ret;
}
#endif

static int mon_init_func(QemuOpts *opts, void *opaque)
{
    CharDriverState *chr;
    const char *chardev;
    const char *mode;
    int flags;

    mode = qemu_opt_get(opts, "mode");
    if (mode == NULL) {
        mode = "readline";
    }
    if (strcmp(mode, "readline") == 0) {
        flags = MONITOR_USE_READLINE;
    } else if (strcmp(mode, "control") == 0) {
        flags = MONITOR_USE_CONTROL;
    } else {
        fprintf(stderr, "unknown monitor mode \"%s\"\n", mode);
        exit(1);
    }

    if (qemu_opt_get_bool(opts, "pretty", 0))
        flags |= MONITOR_USE_PRETTY;

    if (qemu_opt_get_bool(opts, "default", 0))
        flags |= MONITOR_IS_DEFAULT;

    chardev = qemu_opt_get(opts, "chardev");
    chr = qemu_chr_find(chardev);
    if (chr == NULL) {
        fprintf(stderr, "chardev \"%s\" not found\n", chardev);
        exit(1);
    }

    qemu_chr_fe_claim_no_fail(chr);
    monitor_init(chr, flags);
    return 0;
}

static void monitor_parse(const char *optarg, const char *mode)
{
    static int monitor_device_index = 0;
    QemuOpts *opts;
    const char *p;
    char label[32];
    int def = 0;

    if (strstart(optarg, "chardev:", &p)) {
        snprintf(label, sizeof(label), "%s", p);
    } else {
        snprintf(label, sizeof(label), "compat_monitor%d",
                 monitor_device_index);
        if (monitor_device_index == 0) {
            def = 1;
        }
        opts = qemu_chr_parse_compat(label, optarg);
        if (!opts) {
            fprintf(stderr, "parse error: %s\n", optarg);
            exit(1);
        }
    }

    opts = qemu_opts_create(qemu_find_opts("mon"), label, 1, NULL);
    if (!opts) {
        fprintf(stderr, "duplicate chardev: %s\n", label);
        exit(1);
    }
    qemu_opt_set(opts, "mode", mode);
    qemu_opt_set(opts, "chardev", label);
    if (def)
        qemu_opt_set(opts, "default", "on");
    monitor_device_index++;
}

struct device_config {
    enum {
        DEV_USB,       /* -usbdevice     */
        DEV_BT,        /* -bt            */
        DEV_SERIAL,    /* -serial        */
        DEV_PARALLEL,  /* -parallel      */
        DEV_VIRTCON,   /* -virtioconsole */
        DEV_DEBUGCON,  /* -debugcon */
        DEV_GDB,       /* -gdb, -s */
        DEV_SCLP,      /* s390 sclp */
    } type;
    const char *cmdline;
    Location loc;
    QTAILQ_ENTRY(device_config) next;
};

static QTAILQ_HEAD(, device_config) device_configs =
    QTAILQ_HEAD_INITIALIZER(device_configs);

static void add_device_config(int type, const char *cmdline)
{
    struct device_config *conf;

    conf = g_malloc0(sizeof(*conf));
    conf->type = type;
    conf->cmdline = cmdline;
    loc_save(&conf->loc);
    QTAILQ_INSERT_TAIL(&device_configs, conf, next);
}

static int foreach_device_config(int type, int (*func)(const char *cmdline))
{
    struct device_config *conf;
    int rc;

    QTAILQ_FOREACH(conf, &device_configs, next) {
        if (conf->type != type)
            continue;
        loc_push_restore(&conf->loc);
        rc = func(conf->cmdline);
        loc_pop(&conf->loc);
        if (0 != rc)
            return rc;
    }
    return 0;
}

static int serial_parse(const char *devname)
{
    static int index = 0;
    char label[32];

    if (strcmp(devname, "none") == 0)
        return 0;
    if (index == MAX_SERIAL_PORTS) {
        fprintf(stderr, "qemu: too many serial ports\n");
        exit(1);
    }
    snprintf(label, sizeof(label), "serial%d", index);
    serial_hds[index] = qemu_chr_new(label, devname, NULL);
    if (!serial_hds[index]) {
        fprintf(stderr, "qemu: could not connect serial device"
                " to character backend '%s'\n", devname);
        return -1;
    }
    index++;
    return 0;
}

static int parallel_parse(const char *devname)
{
    static int index = 0;
    char label[32];

    if (strcmp(devname, "none") == 0)
        return 0;
    if (index == MAX_PARALLEL_PORTS) {
        fprintf(stderr, "qemu: too many parallel ports\n");
        exit(1);
    }
    snprintf(label, sizeof(label), "parallel%d", index);
    parallel_hds[index] = qemu_chr_new(label, devname, NULL);
    if (!parallel_hds[index]) {
        fprintf(stderr, "qemu: could not connect parallel device"
                " to character backend '%s'\n", devname);
        return -1;
    }
    index++;
    return 0;
}

static int virtcon_parse(const char *devname)
{
    QemuOptsList *device = qemu_find_opts("device");
    static int index = 0;
    char label[32];
    QemuOpts *bus_opts, *dev_opts;

    if (strcmp(devname, "none") == 0)
        return 0;
    if (index == MAX_VIRTIO_CONSOLES) {
        fprintf(stderr, "qemu: too many virtio consoles\n");
        exit(1);
    }

    bus_opts = qemu_opts_create_nofail(device);
    if (arch_type == QEMU_ARCH_S390X) {
        qemu_opt_set(bus_opts, "driver", "virtio-serial-s390");
    } else {
        qemu_opt_set(bus_opts, "driver", "virtio-serial-pci");
    }

    dev_opts = qemu_opts_create_nofail(device);
    qemu_opt_set(dev_opts, "driver", "virtconsole");

    snprintf(label, sizeof(label), "virtcon%d", index);
    virtcon_hds[index] = qemu_chr_new(label, devname, NULL);
    if (!virtcon_hds[index]) {
        fprintf(stderr, "qemu: could not connect virtio console"
                " to character backend '%s'\n", devname);
        return -1;
    }
    qemu_opt_set(dev_opts, "chardev", label);

    index++;
    return 0;
}

static int sclp_parse(const char *devname)
{
    QemuOptsList *device = qemu_find_opts("device");
    static int index = 0;
    char label[32];
    QemuOpts *dev_opts;

    if (strcmp(devname, "none") == 0) {
        return 0;
    }
    if (index == MAX_SCLP_CONSOLES) {
        fprintf(stderr, "qemu: too many sclp consoles\n");
        exit(1);
    }

    assert(arch_type == QEMU_ARCH_S390X);

    dev_opts = qemu_opts_create(device, NULL, 0, NULL);
    qemu_opt_set(dev_opts, "driver", "sclpconsole");

    snprintf(label, sizeof(label), "sclpcon%d", index);
    sclp_hds[index] = qemu_chr_new(label, devname, NULL);
    if (!sclp_hds[index]) {
        fprintf(stderr, "qemu: could not connect sclp console"
                " to character backend '%s'\n", devname);
        return -1;
    }
    qemu_opt_set(dev_opts, "chardev", label);

    index++;
    return 0;
}

static int debugcon_parse(const char *devname)
{
    QemuOpts *opts;

    if (!qemu_chr_new("debugcon", devname, NULL)) {
        exit(1);
    }
    opts = qemu_opts_create(qemu_find_opts("device"), "debugcon", 1, NULL);
    if (!opts) {
        fprintf(stderr, "qemu: already have a debugcon device\n");
        exit(1);
    }
    qemu_opt_set(opts, "driver", "isa-debugcon");
    qemu_opt_set(opts, "chardev", "debugcon");
    return 0;
}

static QEMUMachine *machine_parse(const char *name)
{
    QEMUMachine *m, *machine = NULL;

    if (name) {
        machine = find_machine(name);
    }
    if (machine) {
        return machine;
    }
    printf("Supported machines are:\n");
    for (m = first_machine; m != NULL; m = m->next) {
        if (m->alias) {
            printf("%-20s %s (alias of %s)\n", m->alias, m->desc, m->name);
        }
        printf("%-20s %s%s\n", m->name, m->desc,
               m->is_default ? " (default)" : "");
    }
    exit(!name || !is_help_option(name));
}

static int tcg_init(void)
{
    tcg_exec_init(tcg_tb_size * 1024 * 1024);
    return 0;
}

static struct {
    const char *opt_name;
    const char *name;
    int (*available)(void);
    int (*init)(void);
    bool *allowed;
} accel_list[] = {
    { "tcg", "tcg", tcg_available, tcg_init, &tcg_allowed },
    { "xen", "Xen", xen_available, xen_init, &xen_allowed },
    { "kvm", "KVM", kvm_available, kvm_init, &kvm_allowed },
    { "qtest", "QTest", qtest_available, qtest_init, &qtest_allowed },
};

static int configure_accelerator(void)
{
    const char *p = NULL;
    char buf[10];
    int i, ret;
    bool accel_initialised = false;
    bool init_failed = false;

    QemuOptsList *list = qemu_find_opts("machine");
    if (!QTAILQ_EMPTY(&list->head)) {
        p = qemu_opt_get(QTAILQ_FIRST(&list->head), "accel");
    }

    if (p == NULL) {
        /* Use the default "accelerator", tcg */
        p = "tcg";
    }

    while (!accel_initialised && *p != '\0') {
        if (*p == ':') {
            p++;
        }
        p = get_opt_name(buf, sizeof (buf), p, ':');
        for (i = 0; i < ARRAY_SIZE(accel_list); i++) {
            if (strcmp(accel_list[i].opt_name, buf) == 0) {
                if (!accel_list[i].available()) {
                    printf("%s not supported for this target\n",
                           accel_list[i].name);
                    continue;
                }
                *(accel_list[i].allowed) = true;
                ret = accel_list[i].init();
                if (ret < 0) {
                    init_failed = true;
                    fprintf(stderr, "failed to initialize %s: %s\n",
                            accel_list[i].name,
                            strerror(-ret));
                    *(accel_list[i].allowed) = false;
                } else {
                    accel_initialised = true;
                }
                break;
            }
        }
        if (i == ARRAY_SIZE(accel_list)) {
            fprintf(stderr, "\"%s\" accelerator does not exist.\n", buf);
        }
    }

    if (!accel_initialised) {
        if (!init_failed) {
            fprintf(stderr, "No accelerator found!\n");
        }
        exit(1);
    }

    if (init_failed) {
        fprintf(stderr, "Back to %s accelerator.\n", accel_list[i].name);
    }

    return !accel_initialised;
}

void qemu_add_exit_notifier(Notifier *notify)
{
    notifier_list_add(&exit_notifiers, notify);
}

void qemu_remove_exit_notifier(Notifier *notify)
{
    notifier_remove(notify);
}

static void qemu_run_exit_notifiers(void)
{
    notifier_list_notify(&exit_notifiers, NULL);
}

void qemu_add_machine_init_done_notifier(Notifier *notify)
{
    notifier_list_add(&machine_init_done_notifiers, notify);
}

static void qemu_run_machine_init_done_notifiers(void)
{
    notifier_list_notify(&machine_init_done_notifiers, NULL);
}

static const QEMUOption *lookup_opt(int argc, char **argv,
                                    const char **poptarg, int *poptind)
{
    const QEMUOption *popt;
    int optind = *poptind;
    char *r = argv[optind];
    const char *optarg;

    loc_set_cmdline(argv, optind, 1);
    optind++;
    /* Treat --foo the same as -foo.  */
    if (r[1] == '-')
        r++;
    popt = qemu_options;
    for(;;) {
        if (!popt->name) {
            error_report("invalid option");
            exit(1);
        }
        if (!strcmp(popt->name, r + 1))
            break;
        popt++;
    }
    if (popt->flags & HAS_ARG) {
        if (optind >= argc) {
            error_report("requires an argument");
            exit(1);
        }
        optarg = argv[optind++];
        loc_set_cmdline(argv, optind - 2, 2);
    } else {
        optarg = NULL;
    }

    *poptarg = optarg;
    *poptind = optind;

    return popt;
}

static gpointer malloc_and_trace(gsize n_bytes)
{
    void *ptr = malloc(n_bytes);
    trace_g_malloc(n_bytes, ptr);
    return ptr;
}

static gpointer realloc_and_trace(gpointer mem, gsize n_bytes)
{
    void *ptr = realloc(mem, n_bytes);
    trace_g_realloc(mem, n_bytes, ptr);
    return ptr;
}

static void free_and_trace(gpointer mem)
{
    trace_g_free(mem);
    free(mem);
}

static int object_set_property(const char *name, const char *value, void *opaque)
{
    Object *obj = OBJECT(opaque);
    StringInputVisitor *siv;
    Error *local_err = NULL;

    if (strcmp(name, "qom-type") == 0 || strcmp(name, "id") == 0) {
        return 0;
    }

    siv = string_input_visitor_new(value);
    object_property_set(obj, string_input_get_visitor(siv), name, &local_err);
    string_input_visitor_cleanup(siv);

    if (local_err) {
        qerror_report_err(local_err);
        error_free(local_err);
        return -1;
    }

    return 0;
}

static int object_create(QemuOpts *opts, void *opaque)
{
    const char *type = qemu_opt_get(opts, "qom-type");
    const char *id = qemu_opts_id(opts);
    Object *obj;

    g_assert(type != NULL);

    if (id == NULL) {
        qerror_report(QERR_MISSING_PARAMETER, "id");
        return -1;
    }

    obj = object_new(type);
    if (qemu_opt_foreach(opts, object_set_property, obj, 1) < 0) {
        return -1;
    }

    object_property_add_child(container_get(object_get_root(), "/objects"),
                              id, obj, NULL);

    return 0;
}

int main(int argc, char **argv, char **envp)
{
    int i;
    int snapshot, linux_boot;
    const char *icount_option = NULL;
    const char *initrd_filename;
    const char *kernel_filename, *kernel_cmdline;
    char boot_devices[33] = "";
    DisplayState *ds;
    int cyls, heads, secs, translation;
    QemuOpts *hda_opts = NULL, *opts, *machine_opts;
    QemuOptsList *olist;
    int optind;
    const char *optarg;
    const char *loadvm = NULL;
    QEMUMachine *machine;
    const char *cpu_model;
    const char *vga_model = "none";
    const char *pid_file = NULL;
    const char *incoming = NULL;
#ifdef CONFIG_VNC
    int show_vnc_port = 0;
#endif
    bool defconfig = true;
    bool userconfig = true;
    const char *log_mask = NULL;
    const char *log_file = NULL;
    GMemVTable mem_trace = {
        .malloc = malloc_and_trace,
        .realloc = realloc_and_trace,
        .free = free_and_trace,
    };
    const char *trace_events = NULL;
    const char *trace_file = NULL;

    atexit(qemu_run_exit_notifiers);
    error_set_progname(argv[0]);

    g_mem_set_vtable(&mem_trace);
    if (!g_thread_supported()) {
#if !GLIB_CHECK_VERSION(2, 31, 0)
        g_thread_init(NULL);
#else
        fprintf(stderr, "glib threading failed to initialize.\n");
        exit(1);
#endif
    }

    module_call_init(MODULE_INIT_QOM);

    qemu_add_opts(&qemu_drive_opts);
    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);
    qemu_add_opts(&qemu_tpmdev_opts);
    qemu_add_opts(&qemu_realtime_opts);

    runstate_init();

    init_clocks();
    rtc_clock = host_clock;

    qemu_cache_utils_init(envp);

    QLIST_INIT (&vm_change_state_head);
    os_setup_early_signal_handling();

    module_call_init(MODULE_INIT_MACHINE);
    machine = find_default_machine();
    cpu_model = NULL;
    ram_size = 0;
    snapshot = 0;
    cyls = heads = secs = 0;
    translation = BIOS_ATA_TRANSLATION_AUTO;

    for (i = 0; i < MAX_NODES; i++) {
        node_mem[i] = 0;
        node_cpumask[i] = bitmap_new(MAX_CPUMASK_BITS);
    }

    nb_numa_nodes = 0;
    nb_nics = 0;

    bdrv_init_with_whitelist();

    autostart= 1;

    /* first pass of option parsing */
    optind = 1;
    while (optind < argc) {
        if (argv[optind][0] != '-') {
            /* disk image */
            optind++;
            continue;
        } else {
            const QEMUOption *popt;

            popt = lookup_opt(argc, argv, &optarg, &optind);
            switch (popt->index) {
            case QEMU_OPTION_nodefconfig:
                defconfig = false;
                break;
            case QEMU_OPTION_nouserconfig:
                userconfig = false;
                break;
            }
        }
    }

    if (defconfig) {
        int ret;
        ret = qemu_read_default_config_files(userconfig);
        if (ret < 0) {
            exit(1);
        }
    }

    /* second pass of option parsing */
    optind = 1;
    for(;;) {
        if (optind >= argc)
            break;
        if (argv[optind][0] != '-') {
	    hda_opts = drive_add(IF_DEFAULT, 0, argv[optind++], HD_OPTS);
        } else {
            const QEMUOption *popt;

            popt = lookup_opt(argc, argv, &optarg, &optind);
            if (!(popt->arch_mask & arch_type)) {
                printf("Option %s not supported for this target\n", popt->name);
                exit(1);
            }
            switch(popt->index) {
            case QEMU_OPTION_M:
                machine = machine_parse(optarg);
                break;
            case QEMU_OPTION_no_kvm_irqchip: {
                olist = qemu_find_opts("machine");
                qemu_opts_parse(olist, "kernel_irqchip=off", 0);
                break;
            }
            case QEMU_OPTION_cpu:
                /* hw initialization will check this */
                cpu_model = optarg;
                break;
            case QEMU_OPTION_hda:
                {
                    char buf[256];
                    if (cyls == 0)
                        snprintf(buf, sizeof(buf), "%s", HD_OPTS);
                    else
                        snprintf(buf, sizeof(buf),
                                 "%s,cyls=%d,heads=%d,secs=%d%s",
                                 HD_OPTS , cyls, heads, secs,
                                 translation == BIOS_ATA_TRANSLATION_LBA ?
                                 ",trans=lba" :
                                 translation == BIOS_ATA_TRANSLATION_NONE ?
                                 ",trans=none" : "");
                    drive_add(IF_DEFAULT, 0, optarg, buf);
                    break;
                }
            case QEMU_OPTION_hdb:
            case QEMU_OPTION_hdc:
            case QEMU_OPTION_hdd:
                drive_add(IF_DEFAULT, popt->index - QEMU_OPTION_hda, optarg,
                          HD_OPTS);
                break;
            case QEMU_OPTION_drive:
                if (drive_def(optarg) == NULL) {
                    exit(1);
                }
	        break;
            case QEMU_OPTION_set:
                if (qemu_set_option(optarg) != 0)
                    exit(1);
	        break;
            case QEMU_OPTION_global:
                if (qemu_global_option(optarg) != 0)
                    exit(1);
	        break;
            case QEMU_OPTION_mtdblock:
                drive_add(IF_MTD, -1, optarg, MTD_OPTS);
                break;
            case QEMU_OPTION_sd:
                drive_add(IF_SD, -1, optarg, SD_OPTS);
                break;
            case QEMU_OPTION_pflash:
                drive_add(IF_PFLASH, -1, optarg, PFLASH_OPTS);
                break;
            case QEMU_OPTION_snapshot:
                snapshot = 1;
                break;
            case QEMU_OPTION_hdachs:
                {
                    const char *p;
                    p = optarg;
                    cyls = strtol(p, (char **)&p, 0);
                    if (cyls < 1 || cyls > 16383)
                        goto chs_fail;
                    if (*p != ',')
                        goto chs_fail;
                    p++;
                    heads = strtol(p, (char **)&p, 0);
                    if (heads < 1 || heads > 16)
                        goto chs_fail;
                    if (*p != ',')
                        goto chs_fail;
                    p++;
                    secs = strtol(p, (char **)&p, 0);
                    if (secs < 1 || secs > 63)
                        goto chs_fail;
                    if (*p == ',') {
                        p++;
                        if (!strcmp(p, "none"))
                            translation = BIOS_ATA_TRANSLATION_NONE;
                        else if (!strcmp(p, "lba"))
                            translation = BIOS_ATA_TRANSLATION_LBA;
                        else if (!strcmp(p, "auto"))
                            translation = BIOS_ATA_TRANSLATION_AUTO;
                        else
                            goto chs_fail;
                    } else if (*p != '\0') {
                    chs_fail:
                        fprintf(stderr, "qemu: invalid physical CHS format\n");
                        exit(1);
                    }
		    if (hda_opts != NULL) {
                        char num[16];
                        snprintf(num, sizeof(num), "%d", cyls);
                        qemu_opt_set(hda_opts, "cyls", num);
                        snprintf(num, sizeof(num), "%d", heads);
                        qemu_opt_set(hda_opts, "heads", num);
                        snprintf(num, sizeof(num), "%d", secs);
                        qemu_opt_set(hda_opts, "secs", num);
                        if (translation == BIOS_ATA_TRANSLATION_LBA)
                            qemu_opt_set(hda_opts, "trans", "lba");
                        if (translation == BIOS_ATA_TRANSLATION_NONE)
                            qemu_opt_set(hda_opts, "trans", "none");
                    }
                }
                break;
            case QEMU_OPTION_numa:
                numa_add(optarg);
                break;
            case QEMU_OPTION_display:
                display_type = select_display(optarg);
                break;
            case QEMU_OPTION_nographic:
                display_type = DT_NOGRAPHIC;
                break;
            case QEMU_OPTION_curses:
#ifdef CONFIG_CURSES
                display_type = DT_CURSES;
#else
                fprintf(stderr, "Curses support is disabled\n");
                exit(1);
#endif
                break;
            case QEMU_OPTION_portrait:
                graphic_rotate = 90;
                break;
            case QEMU_OPTION_rotate:
                graphic_rotate = strtol(optarg, (char **) &optarg, 10);
                if (graphic_rotate != 0 && graphic_rotate != 90 &&
                    graphic_rotate != 180 && graphic_rotate != 270) {
                    fprintf(stderr,
                        "qemu: only 90, 180, 270 deg rotation is available\n");
                    exit(1);
                }
                break;
            case QEMU_OPTION_kernel:
                qemu_opts_set(qemu_find_opts("machine"), 0, "kernel", optarg);
                break;
            case QEMU_OPTION_initrd:
                qemu_opts_set(qemu_find_opts("machine"), 0, "initrd", optarg);
                break;
            case QEMU_OPTION_append:
                qemu_opts_set(qemu_find_opts("machine"), 0, "append", optarg);
                break;
            case QEMU_OPTION_dtb:
                qemu_opts_set(qemu_find_opts("machine"), 0, "dtb", optarg);
                break;
            case QEMU_OPTION_cdrom:
                drive_add(IF_DEFAULT, 2, optarg, CDROM_OPTS);
                break;
            case QEMU_OPTION_boot:
                {
                    static const char * const params[] = {
                        "order", "once", "menu",
                        "splash", "splash-time",
                        "reboot-timeout", "strict", NULL
                    };
                    char buf[sizeof(boot_devices)];
                    char *standard_boot_devices;
                    int legacy = 0;

                    if (!strchr(optarg, '=')) {
                        legacy = 1;
                        pstrcpy(buf, sizeof(buf), optarg);
                    } else if (check_params(buf, sizeof(buf), params, optarg) < 0) {
                        fprintf(stderr,
                                "qemu: unknown boot parameter '%s' in '%s'\n",
                                buf, optarg);
                        exit(1);
                    }

                    if (legacy ||
                        get_param_value(buf, sizeof(buf), "order", optarg)) {
                        validate_bootdevices(buf);
                        pstrcpy(boot_devices, sizeof(boot_devices), buf);
                    }
                    if (!legacy) {
                        if (get_param_value(buf, sizeof(buf),
                                            "once", optarg)) {
                            validate_bootdevices(buf);
                            standard_boot_devices = g_strdup(boot_devices);
                            pstrcpy(boot_devices, sizeof(boot_devices), buf);
                            qemu_register_reset(restore_boot_devices,
                                                standard_boot_devices);
                        }
                        if (get_param_value(buf, sizeof(buf),
                                            "menu", optarg)) {
                            if (!strcmp(buf, "on")) {
                                boot_menu = 1;
                            } else if (!strcmp(buf, "off")) {
                                boot_menu = 0;
                            } else {
                                fprintf(stderr,
                                        "qemu: invalid option value '%s'\n",
                                        buf);
                                exit(1);
                            }
                        }
                        if (get_param_value(buf, sizeof(buf),
                                            "strict", optarg)) {
                            if (!strcmp(buf, "on")) {
                                boot_strict = true;
                            } else if (!strcmp(buf, "off")) {
                                boot_strict = false;
                            } else {
                                fprintf(stderr,
                                        "qemu: invalid option value '%s'\n",
                                        buf);
                                exit(1);
                            }
                        }
                        if (!qemu_opts_parse(qemu_find_opts("boot-opts"),
                                             optarg, 0)) {
                            exit(1);
                        }
                    }
                }
                break;
            case QEMU_OPTION_fda:
            case QEMU_OPTION_fdb:
                drive_add(IF_FLOPPY, popt->index - QEMU_OPTION_fda,
                          optarg, FD_OPTS);
                break;
            case QEMU_OPTION_no_fd_bootchk:
                fd_bootchk = 0;
                break;
            case QEMU_OPTION_netdev:
                if (net_client_parse(qemu_find_opts("netdev"), optarg) == -1) {
                    exit(1);
                }
                break;
            case QEMU_OPTION_net:
                if (net_client_parse(qemu_find_opts("net"), optarg) == -1) {
                    exit(1);
                }
                break;
#ifdef CONFIG_LIBISCSI
            case QEMU_OPTION_iscsi:
                opts = qemu_opts_parse(qemu_find_opts("iscsi"), optarg, 0);
                if (!opts) {
                    exit(1);
                }
                break;
#endif
#ifdef CONFIG_SLIRP
            case QEMU_OPTION_tftp:
                legacy_tftp_prefix = optarg;
                break;
            case QEMU_OPTION_bootp:
                legacy_bootp_filename = optarg;
                break;
            case QEMU_OPTION_redir:
                if (net_slirp_redir(optarg) < 0)
                    exit(1);
                break;
#endif
            case QEMU_OPTION_bt:
                add_device_config(DEV_BT, optarg);
                break;
            case QEMU_OPTION_audio_help:
                AUD_help ();
                exit (0);
                break;
            case QEMU_OPTION_soundhw:
                select_soundhw (optarg);
                break;
            case QEMU_OPTION_h:
                help(0);
                break;
            case QEMU_OPTION_version:
                version();
                exit(0);
                break;
            case QEMU_OPTION_m: {
                int64_t value;
                uint64_t sz;
                char *end;

                value = strtosz(optarg, &end);
                if (value < 0 || *end) {
                    fprintf(stderr, "qemu: invalid ram size: %s\n", optarg);
                    exit(1);
                }
                sz = QEMU_ALIGN_UP((uint64_t)value, 8192);
                ram_size = sz;
                if (ram_size != sz) {
                    fprintf(stderr, "qemu: ram size too large\n");
                    exit(1);
                }
                break;
            }
#ifdef CONFIG_TPM
            case QEMU_OPTION_tpmdev:
                if (tpm_config_parse(qemu_find_opts("tpmdev"), optarg) < 0) {
                    exit(1);
                }
                break;
#endif
            case QEMU_OPTION_mempath:
                mem_path = optarg;
                break;
#ifdef MAP_POPULATE
            case QEMU_OPTION_mem_prealloc:
                mem_prealloc = 1;
                break;
#endif
            case QEMU_OPTION_d:
                log_mask = optarg;
                break;
            case QEMU_OPTION_D:
                log_file = optarg;
                break;
            case QEMU_OPTION_s:
                add_device_config(DEV_GDB, "tcp::" DEFAULT_GDBSTUB_PORT);
                break;
            case QEMU_OPTION_gdb:
                add_device_config(DEV_GDB, optarg);
                break;
            case QEMU_OPTION_L:
                if (data_dir_idx < ARRAY_SIZE(data_dir)) {
                    data_dir[data_dir_idx++] = optarg;
                }
                break;
            case QEMU_OPTION_bios:
                bios_name = optarg;
                break;
            case QEMU_OPTION_singlestep:
                singlestep = 1;
                break;
            case QEMU_OPTION_S:
                autostart = 0;
                break;
	    case QEMU_OPTION_k:
		keyboard_layout = optarg;
		break;
            case QEMU_OPTION_localtime:
                rtc_utc = 0;
                break;
            case QEMU_OPTION_vga:
                vga_model = optarg;
                default_vga = 0;
                break;
            case QEMU_OPTION_g:
                {
                    const char *p;
                    int w, h, depth;
                    p = optarg;
                    w = strtol(p, (char **)&p, 10);
                    if (w <= 0) {
                    graphic_error:
                        fprintf(stderr, "qemu: invalid resolution or depth\n");
                        exit(1);
                    }
                    if (*p != 'x')
                        goto graphic_error;
                    p++;
                    h = strtol(p, (char **)&p, 10);
                    if (h <= 0)
                        goto graphic_error;
                    if (*p == 'x') {
                        p++;
                        depth = strtol(p, (char **)&p, 10);
                        if (depth != 8 && depth != 15 && depth != 16 &&
                            depth != 24 && depth != 32)
                            goto graphic_error;
                    } else if (*p == '\0') {
                        depth = graphic_depth;
                    } else {
                        goto graphic_error;
                    }

                    graphic_width = w;
                    graphic_height = h;
                    graphic_depth = depth;
                }
                break;
            case QEMU_OPTION_echr:
                {
                    char *r;
                    term_escape_char = strtol(optarg, &r, 0);
                    if (r == optarg)
                        printf("Bad argument to echr\n");
                    break;
                }
            case QEMU_OPTION_monitor:
                default_monitor = 0;
                if (strncmp(optarg, "none", 4)) {
                    monitor_parse(optarg, "readline");
                }
                break;
            case QEMU_OPTION_qmp:
                monitor_parse(optarg, "control");
                default_monitor = 0;
                break;
            case QEMU_OPTION_mon:
                opts = qemu_opts_parse(qemu_find_opts("mon"), optarg, 1);
                if (!opts) {
                    exit(1);
                }
                default_monitor = 0;
                break;
            case QEMU_OPTION_chardev:
                opts = qemu_opts_parse(qemu_find_opts("chardev"), optarg, 1);
                if (!opts) {
                    exit(1);
                }
                break;
            case QEMU_OPTION_fsdev:
                olist = qemu_find_opts("fsdev");
                if (!olist) {
                    fprintf(stderr, "fsdev is not supported by this qemu build.\n");
                    exit(1);
                }
                opts = qemu_opts_parse(olist, optarg, 1);
                if (!opts) {
                    exit(1);
                }
                break;
            case QEMU_OPTION_virtfs: {
                QemuOpts *fsdev;
                QemuOpts *device;
                const char *writeout, *sock_fd, *socket;

                olist = qemu_find_opts("virtfs");
                if (!olist) {
                    fprintf(stderr, "virtfs is not supported by this qemu build.\n");
                    exit(1);
                }
                opts = qemu_opts_parse(olist, optarg, 1);
                if (!opts) {
                    exit(1);
                }

                if (qemu_opt_get(opts, "fsdriver") == NULL ||
                    qemu_opt_get(opts, "mount_tag") == NULL) {
                    fprintf(stderr, "Usage: -virtfs fsdriver,mount_tag=tag.\n");
                    exit(1);
                }
                fsdev = qemu_opts_create(qemu_find_opts("fsdev"),
                                         qemu_opt_get(opts, "mount_tag"),
                                         1, NULL);
                if (!fsdev) {
                    fprintf(stderr, "duplicate fsdev id: %s\n",
                            qemu_opt_get(opts, "mount_tag"));
                    exit(1);
                }

                writeout = qemu_opt_get(opts, "writeout");
                if (writeout) {
#ifdef CONFIG_SYNC_FILE_RANGE
                    qemu_opt_set(fsdev, "writeout", writeout);
#else
                    fprintf(stderr, "writeout=immediate not supported on "
                            "this platform\n");
                    exit(1);
#endif
                }
                qemu_opt_set(fsdev, "fsdriver", qemu_opt_get(opts, "fsdriver"));
                qemu_opt_set(fsdev, "path", qemu_opt_get(opts, "path"));
                qemu_opt_set(fsdev, "security_model",
                             qemu_opt_get(opts, "security_model"));
                socket = qemu_opt_get(opts, "socket");
                if (socket) {
                    qemu_opt_set(fsdev, "socket", socket);
                }
                sock_fd = qemu_opt_get(opts, "sock_fd");
                if (sock_fd) {
                    qemu_opt_set(fsdev, "sock_fd", sock_fd);
                }

                qemu_opt_set_bool(fsdev, "readonly",
                                qemu_opt_get_bool(opts, "readonly", 0));
                device = qemu_opts_create_nofail(qemu_find_opts("device"));
                qemu_opt_set(device, "driver", "virtio-9p-pci");
                qemu_opt_set(device, "fsdev",
                             qemu_opt_get(opts, "mount_tag"));
                qemu_opt_set(device, "mount_tag",
                             qemu_opt_get(opts, "mount_tag"));
                break;
            }
            case QEMU_OPTION_virtfs_synth: {
                QemuOpts *fsdev;
                QemuOpts *device;

                fsdev = qemu_opts_create(qemu_find_opts("fsdev"), "v_synth",
                                         1, NULL);
                if (!fsdev) {
                    fprintf(stderr, "duplicate option: %s\n", "virtfs_synth");
                    exit(1);
                }
                qemu_opt_set(fsdev, "fsdriver", "synth");

                device = qemu_opts_create_nofail(qemu_find_opts("device"));
                qemu_opt_set(device, "driver", "virtio-9p-pci");
                qemu_opt_set(device, "fsdev", "v_synth");
                qemu_opt_set(device, "mount_tag", "v_synth");
                break;
            }
            case QEMU_OPTION_serial:
                add_device_config(DEV_SERIAL, optarg);
                default_serial = 0;
                if (strncmp(optarg, "mon:", 4) == 0) {
                    default_monitor = 0;
                }
                break;
            case QEMU_OPTION_watchdog:
                if (watchdog) {
                    fprintf(stderr,
                            "qemu: only one watchdog option may be given\n");
                    return 1;
                }
                watchdog = optarg;
                break;
            case QEMU_OPTION_watchdog_action:
                if (select_watchdog_action(optarg) == -1) {
                    fprintf(stderr, "Unknown -watchdog-action parameter\n");
                    exit(1);
                }
                break;
            case QEMU_OPTION_virtiocon:
                add_device_config(DEV_VIRTCON, optarg);
                default_virtcon = 0;
                if (strncmp(optarg, "mon:", 4) == 0) {
                    default_monitor = 0;
                }
                break;
            case QEMU_OPTION_parallel:
                add_device_config(DEV_PARALLEL, optarg);
                default_parallel = 0;
                if (strncmp(optarg, "mon:", 4) == 0) {
                    default_monitor = 0;
                }
                break;
            case QEMU_OPTION_debugcon:
                add_device_config(DEV_DEBUGCON, optarg);
                break;
	    case QEMU_OPTION_loadvm:
		loadvm = optarg;
		break;
            case QEMU_OPTION_full_screen:
                full_screen = 1;
                break;
            case QEMU_OPTION_no_frame:
                no_frame = 1;
                break;
            case QEMU_OPTION_alt_grab:
                alt_grab = 1;
                break;
            case QEMU_OPTION_ctrl_grab:
                ctrl_grab = 1;
                break;
            case QEMU_OPTION_no_quit:
                no_quit = 1;
                break;
#ifdef CONFIG_SDL
            case QEMU_OPTION_sdl:
                display_type = DT_SDL;
                break;
#else
            case QEMU_OPTION_sdl:
                fprintf(stderr, "SDL support is disabled\n");
                exit(1);
#endif
            case QEMU_OPTION_pidfile:
                pid_file = optarg;
                break;
            case QEMU_OPTION_win2k_hack:
                win2k_install_hack = 1;
                break;
            case QEMU_OPTION_rtc_td_hack: {
                static GlobalProperty slew_lost_ticks[] = {
                    {
                        .driver   = "mc146818rtc",
                        .property = "lost_tick_policy",
                        .value    = "slew",
                    },
                    { /* end of list */ }
                };

                qdev_prop_register_global_list(slew_lost_ticks);
                break;
            }
            case QEMU_OPTION_acpitable:
                opts = qemu_opts_parse(qemu_find_opts("acpi"), optarg, 1);
                g_assert(opts != NULL);
                do_acpitable_option(opts);
                break;
            case QEMU_OPTION_smbios:
                do_smbios_option(optarg);
                break;
            case QEMU_OPTION_enable_kvm:
                olist = qemu_find_opts("machine");
                qemu_opts_parse(olist, "accel=kvm", 0);
                break;
            case QEMU_OPTION_machine:
                olist = qemu_find_opts("machine");
                opts = qemu_opts_parse(olist, optarg, 1);
                if (!opts) {
                    exit(1);
                }
                optarg = qemu_opt_get(opts, "type");
                if (optarg) {
                    machine = machine_parse(optarg);
                }
                break;
             case QEMU_OPTION_no_kvm:
                olist = qemu_find_opts("machine");
                qemu_opts_parse(olist, "accel=tcg", 0);
                break;
            case QEMU_OPTION_no_kvm_pit: {
                fprintf(stderr, "Warning: KVM PIT can no longer be disabled "
                                "separately.\n");
                break;
            }
            case QEMU_OPTION_no_kvm_pit_reinjection: {
                static GlobalProperty kvm_pit_lost_tick_policy[] = {
                    {
                        .driver   = "kvm-pit",
                        .property = "lost_tick_policy",
                        .value    = "discard",
                    },
                    { /* end of list */ }
                };

                fprintf(stderr, "Warning: option deprecated, use "
                        "lost_tick_policy property of kvm-pit instead.\n");
                qdev_prop_register_global_list(kvm_pit_lost_tick_policy);
                break;
            }
            case QEMU_OPTION_usb:
                olist = qemu_find_opts("machine");
                qemu_opts_parse(olist, "usb=on", 0);
                break;
            case QEMU_OPTION_usbdevice:
                olist = qemu_find_opts("machine");
                qemu_opts_parse(olist, "usb=on", 0);
                add_device_config(DEV_USB, optarg);
                break;
            case QEMU_OPTION_device:
                if (!qemu_opts_parse(qemu_find_opts("device"), optarg, 1)) {
                    exit(1);
                }
                break;
            case QEMU_OPTION_smp:
                smp_parse(optarg);
                if (smp_cpus < 1) {
                    fprintf(stderr, "Invalid number of CPUs\n");
                    exit(1);
                }
                if (max_cpus < smp_cpus) {
                    fprintf(stderr, "maxcpus must be equal to or greater than "
                            "smp\n");
                    exit(1);
                }
                if (max_cpus > 255) {
                    fprintf(stderr, "Unsupported number of maxcpus\n");
                    exit(1);
                }
                break;
	    case QEMU_OPTION_vnc:
#ifdef CONFIG_VNC
                display_remote++;
                vnc_display = optarg;
#else
                fprintf(stderr, "VNC support is disabled\n");
                exit(1);
#endif
                break;
            case QEMU_OPTION_no_acpi:
                acpi_enabled = 0;
                break;
            case QEMU_OPTION_no_hpet:
                no_hpet = 1;
                break;
            case QEMU_OPTION_balloon:
                if (balloon_parse(optarg) < 0) {
                    fprintf(stderr, "Unknown -balloon argument %s\n", optarg);
                    exit(1);
                }
                break;
            case QEMU_OPTION_no_reboot:
                no_reboot = 1;
                break;
            case QEMU_OPTION_no_shutdown:
                no_shutdown = 1;
                break;
            case QEMU_OPTION_show_cursor:
                cursor_hide = 0;
                break;
            case QEMU_OPTION_uuid:
                if(qemu_uuid_parse(optarg, qemu_uuid) < 0) {
                    fprintf(stderr, "Fail to parse UUID string."
                            " Wrong format.\n");
                    exit(1);
                }
                break;
	    case QEMU_OPTION_option_rom:
		if (nb_option_roms >= MAX_OPTION_ROMS) {
		    fprintf(stderr, "Too many option ROMs\n");
		    exit(1);
		}
                opts = qemu_opts_parse(qemu_find_opts("option-rom"), optarg, 1);
                if (!opts) {
                    exit(1);
                }
                option_rom[nb_option_roms].name = qemu_opt_get(opts, "romfile");
                option_rom[nb_option_roms].bootindex =
                    qemu_opt_get_number(opts, "bootindex", -1);
                if (!option_rom[nb_option_roms].name) {
                    fprintf(stderr, "Option ROM file is not specified\n");
                    exit(1);
                }
		nb_option_roms++;
		break;
            case QEMU_OPTION_semihosting:
                semihosting_enabled = 1;
                break;
            case QEMU_OPTION_tdf:
                fprintf(stderr, "Warning: user space PIT time drift fix "
                                "is no longer supported.\n");
                break;
            case QEMU_OPTION_name:
                qemu_name = g_strdup(optarg);
		 {
		     char *p = strchr(qemu_name, ',');
		     if (p != NULL) {
		        *p++ = 0;
			if (strncmp(p, "process=", 8)) {
			    fprintf(stderr, "Unknown subargument %s to -name\n", p);
			    exit(1);
			}
			p += 8;
			os_set_proc_name(p);
		     }
		 }
                break;
            case QEMU_OPTION_prom_env:
                if (nb_prom_envs >= MAX_PROM_ENVS) {
                    fprintf(stderr, "Too many prom variables\n");
                    exit(1);
                }
                prom_envs[nb_prom_envs] = optarg;
                nb_prom_envs++;
                break;
            case QEMU_OPTION_old_param:
                old_param = 1;
                break;
            case QEMU_OPTION_clock:
                configure_alarms(optarg);
                break;
            case QEMU_OPTION_startdate:
                configure_rtc_date_offset(optarg, 1);
                break;
            case QEMU_OPTION_rtc:
                opts = qemu_opts_parse(qemu_find_opts("rtc"), optarg, 0);
                if (!opts) {
                    exit(1);
                }
                configure_rtc(opts);
                break;
            case QEMU_OPTION_tb_size:
                tcg_tb_size = strtol(optarg, NULL, 0);
                if (tcg_tb_size < 0) {
                    tcg_tb_size = 0;
                }
                break;
            case QEMU_OPTION_icount:
                icount_option = optarg;
                break;
            case QEMU_OPTION_incoming:
                incoming = optarg;
                runstate_set(RUN_STATE_INMIGRATE);
                break;
            case QEMU_OPTION_nodefaults:
                default_serial = 0;
                default_parallel = 0;
                default_virtcon = 0;
                default_sclp = 0;
                default_monitor = 0;
                default_net = 0;
                default_floppy = 0;
                default_cdrom = 0;
                default_sdcard = 0;
                default_vga = 0;
                break;
            case QEMU_OPTION_xen_domid:
                if (!(xen_available())) {
                    printf("Option %s not supported for this target\n", popt->name);
                    exit(1);
                }
                xen_domid = atoi(optarg);
                break;
            case QEMU_OPTION_xen_create:
                if (!(xen_available())) {
                    printf("Option %s not supported for this target\n", popt->name);
                    exit(1);
                }
                xen_mode = XEN_CREATE;
                break;
            case QEMU_OPTION_xen_attach:
                if (!(xen_available())) {
                    printf("Option %s not supported for this target\n", popt->name);
                    exit(1);
                }
                xen_mode = XEN_ATTACH;
                break;
            case QEMU_OPTION_trace:
            {
                opts = qemu_opts_parse(qemu_find_opts("trace"), optarg, 0);
                if (!opts) {
                    exit(1);
                }
                trace_events = qemu_opt_get(opts, "events");
                trace_file = qemu_opt_get(opts, "file");
                break;
            }
            case QEMU_OPTION_readconfig:
                {
                    int ret = qemu_read_config_file(optarg);
                    if (ret < 0) {
                        fprintf(stderr, "read config %s: %s\n", optarg,
                            strerror(-ret));
                        exit(1);
                    }
                    break;
                }
            case QEMU_OPTION_spice:
                olist = qemu_find_opts("spice");
                if (!olist) {
                    fprintf(stderr, "spice is not supported by this qemu build.\n");
                    exit(1);
                }
                opts = qemu_opts_parse(olist, optarg, 0);
                if (!opts) {
                    exit(1);
                }
                display_remote++;
                break;
            case QEMU_OPTION_writeconfig:
                {
                    FILE *fp;
                    if (strcmp(optarg, "-") == 0) {
                        fp = stdout;
                    } else {
                        fp = fopen(optarg, "w");
                        if (fp == NULL) {
                            fprintf(stderr, "open %s: %s\n", optarg, strerror(errno));
                            exit(1);
                        }
                    }
                    qemu_config_write(fp);
                    fclose(fp);
                    break;
                }
            case QEMU_OPTION_qtest:
                qtest_chrdev = optarg;
                break;
            case QEMU_OPTION_qtest_log:
                qtest_log = optarg;
                break;
            case QEMU_OPTION_sandbox:
                opts = qemu_opts_parse(qemu_find_opts("sandbox"), optarg, 1);
                if (!opts) {
                    exit(1);
                }
                break;
            case QEMU_OPTION_add_fd:
#ifndef _WIN32
                opts = qemu_opts_parse(qemu_find_opts("add-fd"), optarg, 0);
                if (!opts) {
                    exit(1);
                }
#else
                error_report("File descriptor passing is disabled on this "
                             "platform");
                exit(1);
#endif
                break;
            case QEMU_OPTION_object:
                opts = qemu_opts_parse(qemu_find_opts("object"), optarg, 1);
                if (!opts) {
                    exit(1);
                }
                break;
            case QEMU_OPTION_realtime:
                opts = qemu_opts_parse(qemu_find_opts("realtime"), optarg, 0);
                if (!opts) {
                    exit(1);
                }
                configure_realtime(opts);
                break;
            default:
                os_parse_cmd_args(popt->index, optarg);
            }
        }
    }
    loc_set_none();

    if (qemu_init_main_loop()) {
        fprintf(stderr, "qemu_init_main_loop failed\n");
        exit(1);
    }

    if (qemu_opts_foreach(qemu_find_opts("sandbox"), parse_sandbox, NULL, 0)) {
        exit(1);
    }

#ifndef _WIN32
    if (qemu_opts_foreach(qemu_find_opts("add-fd"), parse_add_fd, NULL, 1)) {
        exit(1);
    }

    if (qemu_opts_foreach(qemu_find_opts("add-fd"), cleanup_add_fd, NULL, 1)) {
        exit(1);
    }
#endif

    if (machine == NULL) {
        fprintf(stderr, "No machine found.\n");
        exit(1);
    }

    if (machine->hw_version) {
        qemu_set_version(machine->hw_version);
    }

    if (qemu_opts_foreach(qemu_find_opts("object"),
                          object_create, NULL, 0) != 0) {
        exit(1);
    }

    /* Init CPU def lists, based on config
     * - Must be called after all the qemu_read_config_file() calls
     * - Must be called before list_cpus()
     * - Must be called before machine->init()
     */
    cpudef_init();

    if (cpu_model && is_help_option(cpu_model)) {
        list_cpus(stdout, &fprintf, cpu_model);
        exit(0);
    }

    /* Open the logfile at this point, if necessary. We can't open the logfile
     * when encountering either of the logging options (-d or -D) because the
     * other one may be encountered later on the command line, changing the
     * location or level of logging.
     */
    if (log_mask) {
        int mask;
        if (log_file) {
            qemu_set_log_filename(log_file);
        }

        mask = qemu_str_to_log_mask(log_mask);
        if (!mask) {
            qemu_print_log_usage(stdout);
            exit(1);
        }
        qemu_set_log(mask);
    }

    if (!trace_backend_init(trace_events, trace_file)) {
        exit(1);
    }

    /* If no data_dir is specified then try to find it relative to the
       executable path.  */
    if (data_dir_idx < ARRAY_SIZE(data_dir)) {
        data_dir[data_dir_idx] = os_find_datadir(argv[0]);
        if (data_dir[data_dir_idx] != NULL) {
            data_dir_idx++;
        }
    }
    /* If all else fails use the install path specified when building. */
    if (data_dir_idx < ARRAY_SIZE(data_dir)) {
        data_dir[data_dir_idx++] = CONFIG_QEMU_DATADIR;
    }

    /*
     * Default to max_cpus = smp_cpus, in case the user doesn't
     * specify a max_cpus value.
     */
    if (!max_cpus)
        max_cpus = smp_cpus;

    machine->max_cpus = machine->max_cpus ?: 1; /* Default to UP */
    if (smp_cpus > machine->max_cpus) {
        fprintf(stderr, "Number of SMP cpus requested (%d), exceeds max cpus "
                "supported by machine `%s' (%d)\n", smp_cpus,  machine->name,
                machine->max_cpus);
        exit(1);
    }

    /*
     * Get the default machine options from the machine if it is not already
     * specified either by the configuration file or by the command line.
     */
    if (machine->default_machine_opts) {
        qemu_opts_set_defaults(qemu_find_opts("machine"),
                               machine->default_machine_opts, 0);
    }

    qemu_opts_foreach(qemu_find_opts("device"), default_driver_check, NULL, 0);
    qemu_opts_foreach(qemu_find_opts("global"), default_driver_check, NULL, 0);

    if (machine->no_serial) {
        default_serial = 0;
    }
    if (machine->no_parallel) {
        default_parallel = 0;
    }
    if (!machine->use_virtcon) {
        default_virtcon = 0;
    }
    if (!machine->use_sclp) {
        default_sclp = 0;
    }
    if (machine->no_floppy) {
        default_floppy = 0;
    }
    if (machine->no_cdrom) {
        default_cdrom = 0;
    }
    if (machine->no_sdcard) {
        default_sdcard = 0;
    }

    if (is_daemonized()) {
        /* According to documentation and historically, -nographic redirects
         * serial port, parallel port and monitor to stdio, which does not work
         * with -daemonize.  We can redirect these to null instead, but since
         * -nographic is legacy, let's just error out.
         * We disallow -nographic only if all other ports are not redirected
         * explicitly, to not break existing legacy setups which uses
         * -nographic _and_ redirects all ports explicitly - this is valid
         * usage, -nographic is just a no-op in this case.
         */
        if (display_type == DT_NOGRAPHIC
            && (default_parallel || default_serial
                || default_monitor || default_virtcon)) {
            fprintf(stderr, "-nographic can not be used with -daemonize\n");
            exit(1);
        }
#ifdef CONFIG_CURSES
        if (display_type == DT_CURSES) {
            fprintf(stderr, "curses display can not be used with -daemonize\n");
            exit(1);
        }
#endif
    }

    if (display_type == DT_NOGRAPHIC) {
        if (default_parallel)
            add_device_config(DEV_PARALLEL, "null");
        if (default_serial && default_monitor) {
            add_device_config(DEV_SERIAL, "mon:stdio");
        } else if (default_virtcon && default_monitor) {
            add_device_config(DEV_VIRTCON, "mon:stdio");
        } else if (default_sclp && default_monitor) {
            add_device_config(DEV_SCLP, "mon:stdio");
        } else {
            if (default_serial)
                add_device_config(DEV_SERIAL, "stdio");
            if (default_virtcon)
                add_device_config(DEV_VIRTCON, "stdio");
            if (default_sclp) {
                add_device_config(DEV_SCLP, "stdio");
            }
            if (default_monitor)
                monitor_parse("stdio", "readline");
        }
    } else {
        if (default_serial)
            add_device_config(DEV_SERIAL, "vc:80Cx24C");
        if (default_parallel)
            add_device_config(DEV_PARALLEL, "vc:80Cx24C");
        if (default_monitor)
            monitor_parse("vc:80Cx24C", "readline");
        if (default_virtcon)
            add_device_config(DEV_VIRTCON, "vc:80Cx24C");
        if (default_sclp) {
            add_device_config(DEV_SCLP, "vc:80Cx24C");
        }
    }

    if (display_type == DT_DEFAULT && !display_remote) {
#if defined(CONFIG_GTK)
        display_type = DT_GTK;
#elif defined(CONFIG_SDL) || defined(CONFIG_COCOA)
        display_type = DT_SDL;
#elif defined(CONFIG_VNC)
        vnc_display = "localhost:0,to=99";
        show_vnc_port = 1;
#else
        display_type = DT_NONE;
#endif
    }

    if ((no_frame || alt_grab || ctrl_grab) && display_type != DT_SDL) {
        fprintf(stderr, "-no-frame, -alt-grab and -ctrl-grab are only valid "
                        "for SDL, ignoring option\n");
    }
    if (no_quit && (display_type != DT_GTK && display_type != DT_SDL)) {
        fprintf(stderr, "-no-quit is only valid for GTK and SDL, "
                        "ignoring option\n");
    }

#if defined(CONFIG_GTK)
    if (display_type == DT_GTK) {
        early_gtk_display_init();
    }
#endif

    socket_init();

    if (qemu_opts_foreach(qemu_find_opts("chardev"), chardev_init_func, NULL, 1) != 0)
        exit(1);
#ifdef CONFIG_VIRTFS
    if (qemu_opts_foreach(qemu_find_opts("fsdev"), fsdev_init_func, NULL, 1) != 0) {
        exit(1);
    }
#endif

    os_daemonize();

    if (pid_file && qemu_create_pidfile(pid_file) != 0) {
        os_pidfile_error();
        exit(1);
    }

    /* init the memory */
    if (ram_size == 0) {
        ram_size = DEFAULT_RAM_SIZE * 1024 * 1024;
    }

    if (qemu_opts_foreach(qemu_find_opts("device"), device_help_func, NULL, 0)
        != 0) {
        exit(0);
    }

    configure_accelerator();

    if (!qtest_enabled() && qtest_chrdev) {
        qtest_init();
    }

    machine_opts = qemu_opts_find(qemu_find_opts("machine"), 0);
    if (machine_opts) {
        kernel_filename = qemu_opt_get(machine_opts, "kernel");
        initrd_filename = qemu_opt_get(machine_opts, "initrd");
        kernel_cmdline = qemu_opt_get(machine_opts, "append");
    } else {
        kernel_filename = initrd_filename = kernel_cmdline = NULL;
    }

    if (!kernel_cmdline) {
        kernel_cmdline = "";
    }

    linux_boot = (kernel_filename != NULL);

    if (!linux_boot && *kernel_cmdline != '\0') {
        fprintf(stderr, "-append only allowed with -kernel option\n");
        exit(1);
    }

    if (!linux_boot && initrd_filename != NULL) {
        fprintf(stderr, "-initrd only allowed with -kernel option\n");
        exit(1);
    }

    if (!linux_boot && machine_opts && qemu_opt_get(machine_opts, "dtb")) {
        fprintf(stderr, "-dtb only allowed with -kernel option\n");
        exit(1);
    }

    os_set_line_buffering();

    qemu_init_cpu_loop();
    qemu_mutex_lock_iothread();

#ifdef CONFIG_SPICE
    /* spice needs the timers to be initialized by this point */
    qemu_spice_init();
#endif

    if (icount_option && (kvm_enabled() || xen_enabled())) {
        fprintf(stderr, "-icount is not allowed with kvm or xen\n");
        exit(1);
    }
    configure_icount(icount_option);

    /* clean up network at qemu process termination */
    atexit(&net_cleanup);

    if (net_init_clients() < 0) {
        exit(1);
    }

#ifdef CONFIG_TPM
    if (tpm_init() < 0) {
        exit(1);
    }
#endif

    /* init the bluetooth world */
    if (foreach_device_config(DEV_BT, bt_parse))
        exit(1);

    if (!xen_enabled()) {
        /* On 32-bit hosts, QEMU is limited by virtual address space */
        if (ram_size > (2047 << 20) && HOST_LONG_BITS == 32) {
            fprintf(stderr, "qemu: at most 2047 MB RAM can be simulated\n");
            exit(1);
        }
    }

    cpu_exec_init_all();

    blk_mig_init();

    /* open the virtual block devices */
    if (snapshot)
        qemu_opts_foreach(qemu_find_opts("drive"), drive_enable_snapshot, NULL, 0);
    if (qemu_opts_foreach(qemu_find_opts("drive"), drive_init_func,
                          &machine->block_default_type, 1) != 0) {
        exit(1);
    }

    default_drive(default_cdrom, snapshot, machine->block_default_type, 2,
                  CDROM_OPTS);
    default_drive(default_floppy, snapshot, IF_FLOPPY, 0, FD_OPTS);
    default_drive(default_sdcard, snapshot, IF_SD, 0, SD_OPTS);

    register_savevm_live(NULL, "ram", 0, 4, &savevm_ram_handlers, NULL);

    if (nb_numa_nodes > 0) {
        int i;

        if (nb_numa_nodes > MAX_NODES) {
            nb_numa_nodes = MAX_NODES;
        }

        /* If no memory size if given for any node, assume the default case
         * and distribute the available memory equally across all nodes
         */
        for (i = 0; i < nb_numa_nodes; i++) {
            if (node_mem[i] != 0)
                break;
        }
        if (i == nb_numa_nodes) {
            uint64_t usedmem = 0;

            /* On Linux, the each node's border has to be 8MB aligned,
             * the final node gets the rest.
             */
            for (i = 0; i < nb_numa_nodes - 1; i++) {
                node_mem[i] = (ram_size / nb_numa_nodes) & ~((1 << 23UL) - 1);
                usedmem += node_mem[i];
            }
            node_mem[i] = ram_size - usedmem;
        }

        for (i = 0; i < nb_numa_nodes; i++) {
            if (!bitmap_empty(node_cpumask[i], MAX_CPUMASK_BITS)) {
                break;
            }
        }
        /* assigning the VCPUs round-robin is easier to implement, guest OSes
         * must cope with this anyway, because there are BIOSes out there in
         * real machines which also use this scheme.
         */
        if (i == nb_numa_nodes) {
            for (i = 0; i < max_cpus; i++) {
                set_bit(i, node_cpumask[i % nb_numa_nodes]);
            }
        }
    }

    if (qemu_opts_foreach(qemu_find_opts("mon"), mon_init_func, NULL, 1) != 0) {
        exit(1);
    }

    if (foreach_device_config(DEV_SERIAL, serial_parse) < 0)
        exit(1);
    if (foreach_device_config(DEV_PARALLEL, parallel_parse) < 0)
        exit(1);
    if (foreach_device_config(DEV_VIRTCON, virtcon_parse) < 0)
        exit(1);
    if (foreach_device_config(DEV_SCLP, sclp_parse) < 0) {
        exit(1);
    }
    if (foreach_device_config(DEV_DEBUGCON, debugcon_parse) < 0)
        exit(1);

    /* If no default VGA is requested, the default is "none".  */
    if (default_vga) {
        if (cirrus_vga_available()) {
            vga_model = "cirrus";
        } else if (vga_available()) {
            vga_model = "std";
        }
    }
    select_vgahw(vga_model);

    if (watchdog) {
        i = select_watchdog(watchdog);
        if (i > 0)
            exit (i == 1 ? 1 : 0);
    }

    if (machine->compat_props) {
        qdev_prop_register_global_list(machine->compat_props);
    }
    qemu_add_globals();

    qdev_machine_init();

    QEMUMachineInitArgs args = { .ram_size = ram_size,
                                 .boot_device = (boot_devices[0] == '\0') ?
                                                machine->boot_order :
                                                boot_devices,
                                 .kernel_filename = kernel_filename,
                                 .kernel_cmdline = kernel_cmdline,
                                 .initrd_filename = initrd_filename,
                                 .cpu_model = cpu_model };
    machine->init(&args);

    audio_init();

    cpu_synchronize_all_post_init();

    set_numa_modes();

    current_machine = machine;

    /* init USB devices */
    if (usb_enabled(false)) {
        if (foreach_device_config(DEV_USB, usb_parse) < 0)
            exit(1);
    }

    /* init generic devices */
    if (qemu_opts_foreach(qemu_find_opts("device"), device_init_func, NULL, 1) != 0)
        exit(1);

    net_check_clients();

    ds = init_displaystate();

    /* init local displays */
    switch (display_type) {
    case DT_NOGRAPHIC:
        break;
#if defined(CONFIG_CURSES)
    case DT_CURSES:
        curses_display_init(ds, full_screen);
        break;
#endif
#if defined(CONFIG_SDL)
    case DT_SDL:
        sdl_display_init(ds, full_screen, no_frame);
        break;
#elif defined(CONFIG_COCOA)
    case DT_SDL:
        cocoa_display_init(ds, full_screen);
        break;
#endif
#if defined(CONFIG_GTK)
    case DT_GTK:
        gtk_display_init(ds, full_screen);
        break;
#endif
    default:
        break;
    }

    /* must be after terminal init, SDL library changes signal handlers */
    os_setup_signal_handling();

#ifdef CONFIG_VNC
    /* init remote displays */
    if (vnc_display) {
        Error *local_err = NULL;
        vnc_display_init(ds);
        vnc_display_open(ds, vnc_display, &local_err);
        if (local_err != NULL) {
            fprintf(stderr, "Failed to start VNC server on `%s': %s\n",
                    vnc_display, error_get_pretty(local_err));
            error_free(local_err);
            exit(1);
        }

        if (show_vnc_port) {
            printf("VNC server running on `%s'\n", vnc_display_local_addr(ds));
        }
    }
#endif
#ifdef CONFIG_SPICE
    if (using_spice && !qxl_enabled) {
        qemu_spice_display_init(ds);
    }
#endif

    if (foreach_device_config(DEV_GDB, gdbserver_start) < 0) {
        exit(1);
    }

    qdev_machine_creation_done();

    if (rom_load_all() != 0) {
        fprintf(stderr, "rom loading failed\n");
        exit(1);
    }

    /* TODO: once all bus devices are qdevified, this should be done
     * when bus is created by qdev.c */
    qemu_register_reset(qbus_reset_all_fn, sysbus_get_default());
    qemu_run_machine_init_done_notifiers();

    qemu_system_reset(VMRESET_SILENT);
    if (loadvm) {
        if (load_vmstate(loadvm) < 0) {
            autostart = 0;
        }
    }

    if (incoming) {
        Error *local_err = NULL;
        qemu_start_incoming_migration(incoming, &local_err);
        if (local_err) {
            fprintf(stderr, "-incoming %s: %s\n", incoming, error_get_pretty(local_err));
            error_free(local_err);
            exit(1);
        }
    } else if (autostart) {
        vm_start();
    }

    os_setup_post();

    main_loop();
    bdrv_close_all();
    pause_all_vcpus();
    res_free();
#ifdef CONFIG_TPM
    tpm_cleanup();
#endif

    return 0;
}