qemu_next_deadline should not consider host-time timers

It is purely for icount-based virtual timers.  And now that we got the
code right, rename the function to clarify the intended scope.
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Tested-by: NEdgar E. Iglesias <edgar.iglesias@gmail.com>
Signed-off-by: NEdgar E. Iglesias <edgar.iglesias@gmail.com>

cpus.c

@@ -833,7 +833,7 @@ static void *qemu_tcg_cpu_thread_fn(void *arg)
 
     while (1) {
         cpu_exec_all();
-        if (use_icount && qemu_next_deadline() <= 0) {
+        if (use_icount && qemu_next_icount_deadline() <= 0) {
             qemu_notify_event();
         }
         qemu_tcg_wait_io_event();
@@ -1050,7 +1050,7 @@ 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;

qemu-timer.c

@@ -452,7 +452,7 @@ void qemu_clock_warp(QEMUClock *clock)
     }
 
     vm_clock_warp_start = qemu_get_clock_ns(rt_clock);
-    deadline = qemu_next_deadline();
+    deadline = qemu_next_icount_deadline();
     if (deadline > 0) {
         /*
          * Ensure the vm_clock proceeds even when the virtual CPU goes to
@@ -765,21 +765,16 @@ static void host_alarm_handler(int host_signum)
     }
 }
 
-int64_t qemu_next_deadline(void)
+int64_t qemu_next_icount_deadline(void)
 {
     /* To avoid problems with overflow limit this to 2^32.  */
     int64_t delta = INT32_MAX;
 
+    assert(use_icount);
     if (active_timers[QEMU_CLOCK_VIRTUAL]) {
         delta = active_timers[QEMU_CLOCK_VIRTUAL]->expire_time -
                      qemu_get_clock_ns(vm_clock);
     }
-    if (active_timers[QEMU_CLOCK_HOST]) {
-        int64_t hdelta = active_timers[QEMU_CLOCK_HOST]->expire_time -
-                 qemu_get_clock_ns(host_clock);
-        if (hdelta < delta)
-            delta = hdelta;
-    }
 
     if (delta < 0)
         delta = 0;
@@ -1169,7 +1164,7 @@ int qemu_calculate_timeout(void)
         } else {
             /* Wait for either IO to occur or the next
                timer event.  */
-            add = qemu_next_deadline();
+            add = qemu_next_icount_deadline();
             /* We advance the timer before checking for IO.
                Limit the amount we advance so that early IO
                activity won't get the guest too far ahead.  */

qemu-timer.h

@@ -51,7 +51,7 @@ int qemu_timer_expired(QEMUTimer *timer_head, int64_t current_time);
 
 void qemu_run_all_timers(void);
 int qemu_alarm_pending(void);
-int64_t qemu_next_deadline(void);
+int64_t qemu_next_icount_deadline(void);
 void configure_alarms(char const *opt);
 void configure_icount(const char *option);
 int qemu_calculate_timeout(void);