X-Git-Url: https://git.proxmox.com/?a=blobdiff_plain;f=cpus.c;h=6bf4e3f005c117be0ca752eed466aa4cb4051a94;hb=aad04cd024f0c59f0b96f032cde2e24eb3abba6d;hp=6cfb45b01dddc73fcb6a16e43a2116925bcaed84;hpb=67bb172f9d995880a9c752e9f33819f4a63a3fda;p=qemu.git

diff --git a/cpus.c b/cpus.c
index 6cfb45b01..6bf4e3f00 100644
--- a/cpus.c
+++ b/cpus.c
@@ -30,11 +30,13 @@
 #include "gdbstub.h"
 #include "dma.h"
 #include "kvm.h"
-#include "exec-all.h"
 
 #include "qemu-thread.h"
 #include "cpus.h"
+
+#ifndef _WIN32
 #include "compatfd.h"
+#endif
 
 #ifdef SIGRTMIN
 #define SIG_IPI (SIGRTMIN+4)
@@ -148,13 +150,14 @@ static bool cpu_thread_is_idle(CPUState *env)
     if (env->stopped || !vm_running) {
         return true;
     }
-    if (!env->halted || qemu_cpu_has_work(env)) {
+    if (!env->halted || qemu_cpu_has_work(env) ||
+        (kvm_enabled() && kvm_irqchip_in_kernel())) {
         return false;
     }
     return true;
 }
 
-static bool all_cpu_threads_idle(void)
+bool all_cpu_threads_idle(void)
 {
     CPUState *env;
 
@@ -166,29 +169,8 @@ static bool all_cpu_threads_idle(void)
     return true;
 }
 
-static CPUDebugExcpHandler *debug_excp_handler;
-
-CPUDebugExcpHandler *cpu_set_debug_excp_handler(CPUDebugExcpHandler *handler)
+static void cpu_handle_guest_debug(CPUState *env)
 {
-    CPUDebugExcpHandler *old_handler = debug_excp_handler;
-
-    debug_excp_handler = handler;
-    return old_handler;
-}
-
-static void cpu_handle_debug_exception(CPUState *env)
-{
-    CPUWatchpoint *wp;
-
-    if (!env->watchpoint_hit) {
-        QTAILQ_FOREACH(wp, &env->watchpoints, entry) {
-            wp->flags &= ~BP_WATCHPOINT_HIT;
-        }
-    }
-    if (debug_excp_handler) {
-        debug_excp_handler(env);
-    }
-
     gdb_set_stop_cpu(env);
     qemu_system_debug_request();
 #ifdef CONFIG_IOTHREAD
@@ -196,6 +178,16 @@ static void cpu_handle_debug_exception(CPUState *env)
 #endif
 }
 
+#ifdef CONFIG_IOTHREAD
+static void cpu_signal(int sig)
+{
+    if (cpu_single_env) {
+        cpu_exit(cpu_single_env);
+    }
+    exit_request = 1;
+}
+#endif
+
 #ifdef CONFIG_LINUX
 static void sigbus_reraise(void)
 {
@@ -235,11 +227,58 @@ static void qemu_init_sigbus(void)
     prctl(PR_MCE_KILL, PR_MCE_KILL_SET, PR_MCE_KILL_EARLY, 0, 0);
 }
 
+static void qemu_kvm_eat_signals(CPUState *env)
+{
+    struct timespec ts = { 0, 0 };
+    siginfo_t siginfo;
+    sigset_t waitset;
+    sigset_t chkset;
+    int r;
+
+    sigemptyset(&waitset);
+    sigaddset(&waitset, SIG_IPI);
+    sigaddset(&waitset, SIGBUS);
+
+    do {
+        r = sigtimedwait(&waitset, &siginfo, &ts);
+        if (r == -1 && !(errno == EAGAIN || errno == EINTR)) {
+            perror("sigtimedwait");
+            exit(1);
+        }
+
+        switch (r) {
+        case SIGBUS:
+            if (kvm_on_sigbus_vcpu(env, siginfo.si_code, siginfo.si_addr)) {
+                sigbus_reraise();
+            }
+            break;
+        default:
+            break;
+        }
+
+        r = sigpending(&chkset);
+        if (r == -1) {
+            perror("sigpending");
+            exit(1);
+        }
+    } while (sigismember(&chkset, SIG_IPI) || sigismember(&chkset, SIGBUS));
+
+#ifndef CONFIG_IOTHREAD
+    if (sigismember(&chkset, SIGIO) || sigismember(&chkset, SIGALRM)) {
+        qemu_notify_event();
+    }
+#endif
+}
+
 #else /* !CONFIG_LINUX */
 
 static void qemu_init_sigbus(void)
 {
 }
+
+static void qemu_kvm_eat_signals(CPUState *env)
+{
+}
 #endif /* !CONFIG_LINUX */
 
 #ifndef _WIN32
@@ -260,7 +299,7 @@ static void qemu_event_increment(void)
 
     /* EAGAIN is fine, a read must be pending.  */
     if (ret < 0 && errno != EAGAIN) {
-        fprintf(stderr, "qemu_event_increment: write() filed: %s\n",
+        fprintf(stderr, "qemu_event_increment: write() failed: %s\n",
                 strerror(errno));
         exit (1);
     }
@@ -268,7 +307,7 @@ static void qemu_event_increment(void)
 
 static void qemu_event_read(void *opaque)
 {
-    int fd = (unsigned long)opaque;
+    int fd = (intptr_t)opaque;
     ssize_t len;
     char buffer[512];
 
@@ -296,7 +335,7 @@ static int qemu_event_init(void)
         goto fail;
     }
     qemu_set_fd_handler2(fds[0], NULL, qemu_event_read, NULL,
-                         (void *)(unsigned long)fds[0]);
+                         (void *)(intptr_t)fds[0]);
 
     io_thread_fd = fds[1];
     return 0;
@@ -317,7 +356,7 @@ static void dummy_signal(int sig)
  */
 static void sigfd_handler(void *opaque)
 {
-    int fd = (unsigned long) opaque;
+    int fd = (intptr_t)opaque;
     struct qemu_signalfd_siginfo info;
     struct sigaction action;
     ssize_t len;
@@ -346,11 +385,45 @@ static void sigfd_handler(void *opaque)
     }
 }
 
-static int qemu_signalfd_init(sigset_t mask)
+static int qemu_signal_init(void)
 {
     int sigfd;
+    sigset_t set;
 
-    sigfd = qemu_signalfd(&mask);
+#ifdef CONFIG_IOTHREAD
+    /* SIGUSR2 used by posix-aio-compat.c */
+    sigemptyset(&set);
+    sigaddset(&set, SIGUSR2);
+    pthread_sigmask(SIG_UNBLOCK, &set, NULL);
+
+    /*
+     * SIG_IPI must be blocked in the main thread and must not be caught
+     * by sigwait() in the signal thread. Otherwise, the cpu thread will
+     * not catch it reliably.
+     */
+    sigemptyset(&set);
+    sigaddset(&set, SIG_IPI);
+    pthread_sigmask(SIG_BLOCK, &set, NULL);
+
+    sigemptyset(&set);
+    sigaddset(&set, SIGIO);
+    sigaddset(&set, SIGALRM);
+    sigaddset(&set, SIGBUS);
+#else
+    sigemptyset(&set);
+    sigaddset(&set, SIGBUS);
+    if (kvm_enabled()) {
+        /*
+         * We need to process timer signals synchronously to avoid a race
+         * between exit_request check and KVM vcpu entry.
+         */
+        sigaddset(&set, SIGIO);
+        sigaddset(&set, SIGALRM);
+    }
+#endif
+    pthread_sigmask(SIG_BLOCK, &set, NULL);
+
+    sigfd = qemu_signalfd(&set);
     if (sigfd == -1) {
         fprintf(stderr, "failed to create signalfd\n");
         return -errno;
@@ -359,51 +432,63 @@ static int qemu_signalfd_init(sigset_t mask)
     fcntl_setfl(sigfd, O_NONBLOCK);
 
     qemu_set_fd_handler2(sigfd, NULL, sigfd_handler, NULL,
-                         (void *)(unsigned long) sigfd);
+                         (void *)(intptr_t)sigfd);
 
     return 0;
 }
 
-static void qemu_kvm_eat_signals(CPUState *env)
+static void qemu_kvm_init_cpu_signals(CPUState *env)
 {
-    struct timespec ts = { 0, 0 };
-    siginfo_t siginfo;
-    sigset_t waitset;
-    sigset_t chkset;
     int r;
+    sigset_t set;
+    struct sigaction sigact;
 
-    sigemptyset(&waitset);
-    sigaddset(&waitset, SIG_IPI);
-    sigaddset(&waitset, SIGBUS);
+    memset(&sigact, 0, sizeof(sigact));
+    sigact.sa_handler = dummy_signal;
+    sigaction(SIG_IPI, &sigact, NULL);
 
-    do {
-        r = sigtimedwait(&waitset, &siginfo, &ts);
-        if (r == -1 && !(errno == EAGAIN || errno == EINTR)) {
-            perror("sigtimedwait");
-            exit(1);
-        }
+#ifdef CONFIG_IOTHREAD
+    pthread_sigmask(SIG_BLOCK, NULL, &set);
+    sigdelset(&set, SIG_IPI);
+    sigdelset(&set, SIGBUS);
+    r = kvm_set_signal_mask(env, &set);
+    if (r) {
+        fprintf(stderr, "kvm_set_signal_mask: %s\n", strerror(-r));
+        exit(1);
+    }
+#else
+    sigemptyset(&set);
+    sigaddset(&set, SIG_IPI);
+    sigaddset(&set, SIGIO);
+    sigaddset(&set, SIGALRM);
+    pthread_sigmask(SIG_BLOCK, &set, NULL);
 
-        switch (r) {
-        case SIGBUS:
-            if (kvm_on_sigbus_vcpu(env, siginfo.si_code, siginfo.si_addr)) {
-                sigbus_reraise();
-            }
-            break;
-        default:
-            break;
-        }
+    pthread_sigmask(SIG_BLOCK, NULL, &set);
+    sigdelset(&set, SIGIO);
+    sigdelset(&set, SIGALRM);
+#endif
+    sigdelset(&set, SIG_IPI);
+    sigdelset(&set, SIGBUS);
+    r = kvm_set_signal_mask(env, &set);
+    if (r) {
+        fprintf(stderr, "kvm_set_signal_mask: %s\n", strerror(-r));
+        exit(1);
+    }
+}
 
-        r = sigpending(&chkset);
-        if (r == -1) {
-            perror("sigpending");
-            exit(1);
-        }
-    } while (sigismember(&chkset, SIG_IPI) || sigismember(&chkset, SIGBUS));
+static void qemu_tcg_init_cpu_signals(void)
+{
+#ifdef CONFIG_IOTHREAD
+    sigset_t set;
+    struct sigaction sigact;
 
-#ifndef CONFIG_IOTHREAD
-    if (sigismember(&chkset, SIGIO) || sigismember(&chkset, SIGALRM)) {
-        qemu_notify_event();
-    }
+    memset(&sigact, 0, sizeof(sigact));
+    sigact.sa_handler = cpu_signal;
+    sigaction(SIG_IPI, &sigact, NULL);
+
+    sigemptyset(&set);
+    sigaddset(&set, SIG_IPI);
+    pthread_sigmask(SIG_UNBLOCK, &set, NULL);
 #endif
 }
 
@@ -435,75 +520,30 @@ static void qemu_event_increment(void)
     }
 }
 
-static void qemu_kvm_eat_signals(CPUState *env)
+static int qemu_signal_init(void)
 {
+    return 0;
 }
-#endif /* _WIN32 */
 
-#ifndef CONFIG_IOTHREAD
 static void qemu_kvm_init_cpu_signals(CPUState *env)
 {
-#ifndef _WIN32
-    int r;
-    sigset_t set;
-    struct sigaction sigact;
-
-    memset(&sigact, 0, sizeof(sigact));
-    sigact.sa_handler = dummy_signal;
-    sigaction(SIG_IPI, &sigact, NULL);
-
-    sigemptyset(&set);
-    sigaddset(&set, SIG_IPI);
-    sigaddset(&set, SIGIO);
-    sigaddset(&set, SIGALRM);
-    pthread_sigmask(SIG_BLOCK, &set, NULL);
-
-    pthread_sigmask(SIG_BLOCK, NULL, &set);
-    sigdelset(&set, SIG_IPI);
-    sigdelset(&set, SIGBUS);
-    sigdelset(&set, SIGIO);
-    sigdelset(&set, SIGALRM);
-    r = kvm_set_signal_mask(env, &set);
-    if (r) {
-        fprintf(stderr, "kvm_set_signal_mask: %s\n", strerror(-r));
-        exit(1);
-    }
-#endif
+    abort();
 }
 
-#ifndef _WIN32
-static sigset_t block_synchronous_signals(void)
+static void qemu_tcg_init_cpu_signals(void)
 {
-    sigset_t set;
-
-    sigemptyset(&set);
-    sigaddset(&set, SIGBUS);
-    if (kvm_enabled()) {
-        /*
-         * We need to process timer signals synchronously to avoid a race
-         * between exit_request check and KVM vcpu entry.
-         */
-        sigaddset(&set, SIGIO);
-        sigaddset(&set, SIGALRM);
-    }
-
-    return set;
 }
-#endif
+#endif /* _WIN32 */
 
+#ifndef CONFIG_IOTHREAD
 int qemu_init_main_loop(void)
 {
-#ifndef _WIN32
-    sigset_t blocked_signals;
     int ret;
 
-    blocked_signals = block_synchronous_signals();
-
-    ret = qemu_signalfd_init(blocked_signals);
+    ret = qemu_signal_init();
     if (ret) {
         return ret;
     }
-#endif
 
     qemu_init_sigbus();
 
@@ -529,6 +569,8 @@ void qemu_init_vcpu(void *_env)
             exit(1);
         }
         qemu_kvm_init_cpu_signals(env);
+    } else {
+        qemu_tcg_init_cpu_signals();
     }
 }
 
@@ -594,7 +636,8 @@ void vm_stop(int reason)
 #else /* CONFIG_IOTHREAD */
 
 QemuMutex qemu_global_mutex;
-static QemuMutex qemu_fair_mutex;
+static QemuCond qemu_io_proceeded_cond;
+static bool iothread_requesting_mutex;
 
 static QemuThread io_thread;
 
@@ -609,77 +652,13 @@ static QemuCond qemu_system_cond;
 static QemuCond qemu_pause_cond;
 static QemuCond qemu_work_cond;
 
-static void cpu_signal(int sig)
-{
-    if (cpu_single_env) {
-        cpu_exit(cpu_single_env);
-    }
-    exit_request = 1;
-}
-
-static void qemu_kvm_init_cpu_signals(CPUState *env)
-{
-    int r;
-    sigset_t set;
-    struct sigaction sigact;
-
-    memset(&sigact, 0, sizeof(sigact));
-    sigact.sa_handler = dummy_signal;
-    sigaction(SIG_IPI, &sigact, NULL);
-
-    pthread_sigmask(SIG_BLOCK, NULL, &set);
-    sigdelset(&set, SIG_IPI);
-    sigdelset(&set, SIGBUS);
-    r = kvm_set_signal_mask(env, &set);
-    if (r) {
-        fprintf(stderr, "kvm_set_signal_mask: %s\n", strerror(-r));
-        exit(1);
-    }
-}
-
-static void qemu_tcg_init_cpu_signals(void)
-{
-    sigset_t set;
-    struct sigaction sigact;
-
-    memset(&sigact, 0, sizeof(sigact));
-    sigact.sa_handler = cpu_signal;
-    sigaction(SIG_IPI, &sigact, NULL);
-
-    sigemptyset(&set);
-    sigaddset(&set, SIG_IPI);
-    pthread_sigmask(SIG_UNBLOCK, &set, NULL);
-}
-
-static sigset_t block_io_signals(void)
-{
-    sigset_t set;
-
-    /* SIGUSR2 used by posix-aio-compat.c */
-    sigemptyset(&set);
-    sigaddset(&set, SIGUSR2);
-    pthread_sigmask(SIG_UNBLOCK, &set, NULL);
-
-    sigemptyset(&set);
-    sigaddset(&set, SIGIO);
-    sigaddset(&set, SIGALRM);
-    sigaddset(&set, SIG_IPI);
-    sigaddset(&set, SIGBUS);
-    pthread_sigmask(SIG_BLOCK, &set, NULL);
-
-    return set;
-}
-
 int qemu_init_main_loop(void)
 {
     int ret;
-    sigset_t blocked_signals;
 
     qemu_init_sigbus();
 
-    blocked_signals = block_io_signals();
-
-    ret = qemu_signalfd_init(blocked_signals);
+    ret = qemu_signal_init();
     if (ret) {
         return ret;
     }
@@ -694,7 +673,7 @@ int qemu_init_main_loop(void)
     qemu_cond_init(&qemu_system_cond);
     qemu_cond_init(&qemu_pause_cond);
     qemu_cond_init(&qemu_work_cond);
-    qemu_mutex_init(&qemu_fair_mutex);
+    qemu_cond_init(&qemu_io_proceeded_cond);
     qemu_mutex_init(&qemu_global_mutex);
     qemu_mutex_lock(&qemu_global_mutex);
 
@@ -771,20 +750,15 @@ static void qemu_tcg_wait_io_event(void)
     CPUState *env;
 
     while (all_cpu_threads_idle()) {
-        qemu_cond_timedwait(tcg_halt_cond, &qemu_global_mutex, 1000);
+       /* 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);
+    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);
@@ -794,7 +768,7 @@ static void qemu_tcg_wait_io_event(void)
 static void qemu_kvm_wait_io_event(CPUState *env)
 {
     while (cpu_thread_is_idle(env)) {
-        qemu_cond_timedwait(env->halt_cond, &qemu_global_mutex, 1000);
+        qemu_cond_wait(env->halt_cond, &qemu_global_mutex);
     }
 
     qemu_kvm_eat_signals(env);
@@ -808,6 +782,7 @@ static void *qemu_kvm_cpu_thread_fn(void *arg)
 
     qemu_mutex_lock(&qemu_global_mutex);
     qemu_thread_get_self(env->thread);
+    env->thread_id = qemu_get_thread_id();
 
     r = kvm_init_vcpu(env);
     if (r < 0) {
@@ -823,14 +798,14 @@ static void *qemu_kvm_cpu_thread_fn(void *arg)
 
     /* and wait for machine initialization */
     while (!qemu_system_ready) {
-        qemu_cond_timedwait(&qemu_system_cond, &qemu_global_mutex, 100);
+        qemu_cond_wait(&qemu_system_cond, &qemu_global_mutex);
     }
 
     while (1) {
         if (cpu_can_run(env)) {
             r = kvm_cpu_exec(env);
             if (r == EXCP_DEBUG) {
-                cpu_handle_debug_exception(env);
+                cpu_handle_guest_debug(env);
             }
         }
         qemu_kvm_wait_io_event(env);
@@ -849,42 +824,69 @@ static void *qemu_tcg_cpu_thread_fn(void *arg)
     /* signal CPU creation */
     qemu_mutex_lock(&qemu_global_mutex);
     for (env = first_cpu; env != NULL; env = env->next_cpu) {
+        env->thread_id = qemu_get_thread_id();
         env->created = 1;
     }
     qemu_cond_signal(&qemu_cpu_cond);
 
     /* and wait for machine initialization */
     while (!qemu_system_ready) {
-        qemu_cond_timedwait(&qemu_system_cond, &qemu_global_mutex, 100);
+        qemu_cond_wait(&qemu_system_cond, &qemu_global_mutex);
     }
 
     while (1) {
         cpu_exec_all();
+        if (use_icount && qemu_next_icount_deadline() <= 0) {
+            qemu_notify_event();
+        }
         qemu_tcg_wait_io_event();
     }
 
     return NULL;
 }
 
+static void qemu_cpu_kick_thread(CPUState *env)
+{
+#ifndef _WIN32
+    int err;
+
+    err = pthread_kill(env->thread->thread, SIG_IPI);
+    if (err) {
+        fprintf(stderr, "qemu:%s: %s", __func__, strerror(err));
+        exit(1);
+    }
+#else /* _WIN32 */
+    if (!qemu_cpu_is_self(env)) {
+        SuspendThread(env->thread->thread);
+        cpu_signal(0);
+        ResumeThread(env->thread->thread);
+    }
+#endif
+}
+
 void qemu_cpu_kick(void *_env)
 {
     CPUState *env = _env;
 
     qemu_cond_broadcast(env->halt_cond);
     if (!env->thread_kicked) {
-        qemu_thread_signal(env->thread, SIG_IPI);
+        qemu_cpu_kick_thread(env);
         env->thread_kicked = true;
     }
 }
 
 void qemu_cpu_kick_self(void)
 {
+#ifndef _WIN32
     assert(cpu_single_env);
 
     if (!cpu_single_env->thread_kicked) {
-        qemu_thread_signal(cpu_single_env->thread, SIG_IPI);
+        qemu_cpu_kick_thread(cpu_single_env);
         cpu_single_env->thread_kicked = true;
     }
+#else
+    abort();
+#endif
 }
 
 int qemu_cpu_is_self(void *_env)
@@ -899,12 +901,13 @@ void qemu_mutex_lock_iothread(void)
     if (kvm_enabled()) {
         qemu_mutex_lock(&qemu_global_mutex);
     } else {
-        qemu_mutex_lock(&qemu_fair_mutex);
+        iothread_requesting_mutex = true;
         if (qemu_mutex_trylock(&qemu_global_mutex)) {
-            qemu_thread_signal(tcg_cpu_thread, SIG_IPI);
+            qemu_cpu_kick_thread(first_cpu);
             qemu_mutex_lock(&qemu_global_mutex);
         }
-        qemu_mutex_unlock(&qemu_fair_mutex);
+        iothread_requesting_mutex = false;
+        qemu_cond_broadcast(&qemu_io_proceeded_cond);
     }
 }
 
@@ -938,7 +941,7 @@ void pause_all_vcpus(void)
     }
 
     while (!all_vcpus_paused()) {
-        qemu_cond_timedwait(&qemu_pause_cond, &qemu_global_mutex, 100);
+        qemu_cond_wait(&qemu_pause_cond, &qemu_global_mutex);
         penv = first_cpu;
         while (penv) {
             qemu_cpu_kick(penv);
@@ -970,7 +973,7 @@ static void qemu_tcg_init_vcpu(void *_env)
         qemu_cond_init(env->halt_cond);
         qemu_thread_create(env->thread, qemu_tcg_cpu_thread_fn, env);
         while (env->created == 0) {
-            qemu_cond_timedwait(&qemu_cpu_cond, &qemu_global_mutex, 100);
+            qemu_cond_wait(&qemu_cpu_cond, &qemu_global_mutex);
         }
         tcg_cpu_thread = env->thread;
         tcg_halt_cond = env->halt_cond;
@@ -987,7 +990,7 @@ static void qemu_kvm_start_vcpu(CPUState *env)
     qemu_cond_init(env->halt_cond);
     qemu_thread_create(env->thread, qemu_kvm_cpu_thread_fn, env);
     while (env->created == 0) {
-        qemu_cond_timedwait(&qemu_cpu_cond, &qemu_global_mutex, 100);
+        qemu_cond_wait(&qemu_cpu_cond, &qemu_global_mutex);
     }
 }
 
@@ -1051,7 +1054,7 @@ static int tcg_cpu_exec(CPUState *env)
         qemu_icount -= (env->icount_decr.u16.low + env->icount_extra);
         env->icount_decr.u16.low = 0;
         env->icount_extra = 0;
-        count = qemu_icount_round (qemu_next_deadline());
+        count = qemu_icount_round(qemu_next_icount_deadline());
         qemu_icount += count;
         decr = (count > 0xffff) ? 0xffff : count;
         count -= decr;
@@ -1077,6 +1080,9 @@ 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;
     }
@@ -1086,9 +1092,11 @@ bool cpu_exec_all(void)
         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);
@@ -1097,7 +1105,7 @@ bool cpu_exec_all(void)
                 r = tcg_cpu_exec(env);
             }
             if (r == EXCP_DEBUG) {
-                cpu_handle_debug_exception(env);
+                cpu_handle_guest_debug(env);
                 break;
             }
         } else if (env->stop || env->stopped) {
@@ -1138,6 +1146,11 @@ void set_cpu_log(const char *optarg)
     cpu_set_log(mask);
 }
 
+void set_cpu_log_filename(const char *optarg)
+{
+    cpu_set_log_filename(optarg);
+}
+
 /* Return the virtual CPU time, based on the instruction counter.  */
 int64_t cpu_get_icount(void)
 {