示例#1
0
/* modify the current timer so that it will be fired when current_time
   >= expire_time. The corresponding callback will be called. */
static void qemu_mod_timer_ns(QEMUTimer *ts, int64_t expire_time)
{
    QEMUTimer **pt, *t;

    qemu_del_timer(ts);

    /* add the timer in the sorted list */
    /* NOTE: this code must be signal safe because
       qemu_timer_expired() can be called from a signal. */
    pt = &active_timers[ts->clock->type];
    for(;;) {
        t = *pt;
        if (!qemu_timer_expired_ns(t, expire_time)) {
            break;
        }
        pt = &t->next;
    }
    ts->expire_time = expire_time;
    ts->next = *pt;
    *pt = ts;

    /* Rearm if necessary  */
    if (pt == &active_timers[ts->clock->type]) {
        if (!alarm_timer->pending) {
            qemu_rearm_alarm_timer(alarm_timer);
        }
        /* Interrupt execution to force deadline recalculation.  */
        qemu_clock_warp(ts->clock);
        if (use_icount) {
            qemu_notify_event();
        }
    }
}
示例#2
0
static void tcg_exec_all(void)
{
    int r;

    /* Account partial waits to the vm_clock.  */
    qemu_clock_warp(vm_clock);

    if (next_cpu == NULL) {
        next_cpu = first_cpu;
    }
    for (; next_cpu != NULL && !exit_request; next_cpu = next_cpu->next_cpu) {
        CPUArchState *env = next_cpu;
        CPUState *cpu = ENV_GET_CPU(env);

        qemu_clock_enable(vm_clock,
                          (env->singlestep_enabled & SSTEP_NOTIMER) == 0);

        if (cpu_can_run(cpu)) {
            r = tcg_cpu_exec(env);
            if (r == EXCP_DEBUG) {
                cpu_handle_guest_debug(env);
                break;
            }
        } else if (cpu->stop || cpu->stopped) {
            break;
        }
    }
    exit_request = 0;
}
示例#3
0
文件: cpus.c 项目: zhouy-fnst/qemu
static void tcg_exec_all(void)
{
    int r;

    /* Account partial waits to QEMU_CLOCK_VIRTUAL.  */
    qemu_clock_warp(QEMU_CLOCK_VIRTUAL);

    if (next_cpu == NULL) {
        next_cpu = first_cpu;
    }
    for (; next_cpu != NULL && !exit_request; next_cpu = next_cpu->next_cpu) {
        CPUState *cpu = next_cpu;
        CPUArchState *env = cpu->env_ptr;

        qemu_clock_enable(QEMU_CLOCK_VIRTUAL,
                          (cpu->singlestep_enabled & SSTEP_NOTIMER) == 0);

        if (cpu_can_run(cpu)) {
            r = tcg_cpu_exec(env);
            if (r == EXCP_DEBUG) {
                cpu_handle_guest_debug(cpu);
                break;
            }
        } else if (cpu->stop || cpu->stopped) {
            break;
        }
    }
    exit_request = 0;
}
示例#4
0
文件: cpus.c 项目: 0bliv10n/s2e
static void qemu_tcg_wait_io_event(void)
{
    CPUArchState *env;

    while (all_cpu_threads_idle()) {
#ifdef CONFIG_S2E_DEBUG
        s2e_debug_print("CPU: qemu_tcg_wait_io_event: waiting for awaken cpu %p\n", tcg_halt_cond);
#endif
        /* Start accounting real time to the virtual clock if the CPUs
          are idle.  */
        qemu_clock_warp(vm_clock);
        qemu_cond_wait(tcg_halt_cond, &qemu_global_mutex);
    }

    while (iothread_requesting_mutex) {
#ifdef CONFIG_S2E_DEBUG
        s2e_debug_print("CPU: qemu_tcg_wait_io_event iothread_requesting_mutex\n");
#endif
        qemu_cond_wait(&qemu_io_proceeded_cond, &qemu_global_mutex);
    }

    for (env = first_cpu; env != NULL; env = env->next_cpu) {
        qemu_wait_io_event_common(env);
    }
}
示例#5
0
bool cpu_exec_all(void)
{
    int r;

    /* Account partial waits to the vm_clock.  */
    qemu_clock_warp(vm_clock);

    if (next_cpu == NULL) {
        next_cpu = first_cpu;
    }
    for (; next_cpu != NULL && !exit_request; next_cpu = next_cpu->next_cpu) {
        CPUState *env = next_cpu;

        qemu_clock_enable(vm_clock,
                          (env->singlestep_enabled & SSTEP_NOTIMER) == 0);

        if (cpu_can_run(env)) {
            if (kvm_enabled()) {
                r = kvm_cpu_exec(env);
                qemu_kvm_eat_signals(env);
            } else {
                r = tcg_cpu_exec(env);
            }
            if (r == EXCP_DEBUG) {
                cpu_handle_guest_debug(env);
                break;
            }
        } else if (env->stop || env->stopped) {
            break;
        }
    }
    exit_request = 0;
    return !all_cpu_threads_idle();
}
示例#6
0
static void qemu_tcg_wait_io_event(void)
{
    CPUState *env;

    while (all_cpu_threads_idle()) {
       /* Start accounting real time to the virtual clock if the CPUs
          are idle.  */
        qemu_clock_warp(vm_clock);
        qemu_cond_wait(tcg_halt_cond, &qemu_global_mutex);
    }

    qemu_mutex_unlock(&qemu_global_mutex);

    /*
     * Users of qemu_global_mutex can be starved, having no chance
     * to acquire it since this path will get to it first.
     * So use another lock to provide fairness.
     */
    qemu_mutex_lock(&qemu_fair_mutex);
    qemu_mutex_unlock(&qemu_fair_mutex);

    qemu_mutex_lock(&qemu_global_mutex);

    for (env = first_cpu; env != NULL; env = env->next_cpu) {
        qemu_wait_io_event_common(env);
    }
}
示例#7
0
文件: cpus.c 项目: linuxcer/qemu
bool cpu_exec_all(void)
{
    int r;

    /* Account partial waits to the vm_clock.  */
    qemu_clock_warp(vm_clock);

    if (next_cpu == NULL) {
        next_cpu = first_cpu;
    }
    for (; next_cpu != NULL && !exit_request; next_cpu = next_cpu->next_cpu) {
        CPUState *env = next_cpu;

        qemu_clock_enable(vm_clock,
                          (env->singlestep_enabled & SSTEP_NOTIMER) == 0);

#ifndef CONFIG_IOTHREAD
        if (qemu_alarm_pending()) {
            break;
        }
#endif
        if (cpu_can_run(env)) {
            if (kvm_enabled()) {
                r = kvm_cpu_exec(env);
                qemu_kvm_eat_signals(env);
            } else {
                r = tcg_cpu_exec(env);
            }
            if (r == EXCP_TRIPLE) {
                cpu_dump_state(env, stderr, fprintf, 0);
                fprintf(stderr, "Triple fault.  Halting for inspection via"
                        " QEMU monitor.\n");
                if (gdbserver_running())
                    r = EXCP_DEBUG;
                else {
                    vm_stop(0);
                    break;
                }
            }
            if (r == EXCP_DEBUG) {
                cpu_handle_guest_debug(env);
                break;
            }
        } else if (env->stop || env->stopped) {
            break;
        }
    }
    exit_request = 0;
    return !all_cpu_threads_idle();
}
示例#8
0
static void qemu_tcg_wait_io_event(void)
{
    CPUArchState *env;

    while (all_cpu_threads_idle()) {
       /* Start accounting real time to the virtual clock if the CPUs
          are idle.  */
        qemu_clock_warp(vm_clock);
        qemu_cond_wait(tcg_halt_cond, &qemu_global_mutex);
    }

    while (iothread_requesting_mutex) {
        qemu_cond_wait(&qemu_io_proceeded_cond, &qemu_global_mutex);
    }

    for (env = first_cpu; env != NULL; env = env->next_cpu) {
        qemu_wait_io_event_common(ENV_GET_CPU(env));
    }
}
示例#9
0
文件: cpus.c 项目: zhouy-fnst/qemu
static void qemu_tcg_wait_io_event(void)
{
    CPUState *cpu;

    while (all_cpu_threads_idle()) {
       /* Start accounting real time to the virtual clock if the CPUs
          are idle.  */
        qemu_clock_warp(QEMU_CLOCK_VIRTUAL);
        qemu_cond_wait(tcg_halt_cond, &qemu_global_mutex);
    }

    while (iothread_requesting_mutex) {
        qemu_cond_wait(&qemu_io_proceeded_cond, &qemu_global_mutex);
    }

    for (cpu = first_cpu; cpu != NULL; cpu = cpu->next_cpu) {
        qemu_wait_io_event_common(cpu);
    }
}
示例#10
0
文件: main-loop.c 项目: JMR-b/qemu
int main_loop_wait(int nonblocking)
{
    int ret;
    uint32_t timeout = UINT32_MAX;
    int64_t timeout_ns;

    if (nonblocking) {
        timeout = 0;
    }

    /* poll any events */
    g_array_set_size(gpollfds, 0); /* reset for new iteration */
    /* XXX: separate device handlers from system ones */
#ifdef CONFIG_SLIRP
    slirp_pollfds_fill(gpollfds, &timeout);
#endif

    if (timeout == UINT32_MAX) {
        timeout_ns = -1;
    } else {
        timeout_ns = (uint64_t)timeout * (int64_t)(SCALE_MS);
    }

    timeout_ns = qemu_soonest_timeout(timeout_ns,
                                      timerlistgroup_deadline_ns(
                                          &main_loop_tlg));

    ret = os_host_main_loop_wait(timeout_ns);
#ifdef CONFIG_SLIRP
    slirp_pollfds_poll(gpollfds, (ret < 0));
#endif

    /* CPU thread can infinitely wait for event after
       missing the warp */
    qemu_clock_warp(QEMU_CLOCK_VIRTUAL);
    qemu_clock_run_all_timers();

    return ret;
}