cpus: prepare new CpusAccel cpu accelerator interface

The new interface starts unused, will start being used by the
next patches.

It provides methods for each accelerator to start a vcpu, kick a vcpu,
synchronize state, get cpu virtual clock and elapsed ticks.

In qemu_wait_io_event, make it clear that APC is used only for HAX
on Windows.

Signed-off-by: Claudio Fontana <cfontana@suse.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 2 insertions, 7 deletions

diff --git a/softmmu/cpu-timers.c b/softmmu/cpu-timers.c
index 7efec17fea..1eb7c675c1 100644
--- a/softmmu/cpu-timers.c
+++ b/softmmu/cpu-timers.c
@@ -61,18 +61,13 @@ static int64_t cpu_get_ticks_locked(void)
 }
 
 /*
- * return the time elapsed in VM between vm_start and vm_stop.  Unless
- * icount is active, cpu_get_ticks() uses units of the host CPU cycle
- * counter.
+ * return the time elapsed in VM between vm_start and vm_stop.
+ * cpu_get_ticks() uses units of the host CPU cycle counter.
  */
 int64_t cpu_get_ticks(void)
 {
     int64_t ticks;
 
-    if (icount_enabled()) {
-        return icount_get();
-    }
-
     qemu_spin_lock(&timers_state.vm_clock_lock);
     ticks = cpu_get_ticks_locked();
     qemu_spin_unlock(&timers_state.vm_clock_lock);