add qemu_get_clock_ns

Some places use get_clock directly because they want to access the
rt_clock with nanosecond precision.  Add a function to do exactly that
instead of using internal interfaces.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

2 files changed, 20 insertions, 2 deletions

diff --git a/qemu-timer.h b/qemu-timer.h
index e7eaa0436c..c17b4e6058 100644
--- a/qemu-timer.h
+++ b/qemu-timer.h
@@ -25,6 +25,7 @@ extern QEMUClock *vm_clock;
 extern QEMUClock *host_clock;
 
 int64_t qemu_get_clock(QEMUClock *clock);
+int64_t qemu_get_clock_ns(QEMUClock *clock);
 
 QEMUTimer *qemu_new_timer(QEMUClock *clock, QEMUTimerCB *cb, void *opaque);
 void qemu_free_timer(QEMUTimer *ts);
diff --git a/vl.c b/vl.c
index 880bcd5943..b87044c53c 100644
--- a/vl.c
+++ b/vl.c
@@ -931,6 +931,23 @@ int64_t qemu_get_clock(QEMUClock *clock)
     }
 }
 
+int64_t qemu_get_clock_ns(QEMUClock *clock)
+{
+    switch(clock->type) {
+    case QEMU_CLOCK_REALTIME:
+        return get_clock();
+    default:
+    case QEMU_CLOCK_VIRTUAL:
+        if (use_icount) {
+            return cpu_get_icount();
+        } else {
+            return cpu_get_clock();
+        }
+    case QEMU_CLOCK_HOST:
+        return get_clock_realtime();
+    }
+}
+
 static void init_clocks(void)
 {
     init_get_clock();
@@ -2866,7 +2883,7 @@ static int ram_save_live(Monitor *mon, QEMUFile *f, int stage, void *opaque)
     }
 
     bytes_transferred_last = bytes_transferred;
-    bwidth = get_clock();
+    bwidth = qemu_get_clock_ns(rt_clock);
 
     while (!qemu_file_rate_limit(f)) {
         int ret;
@@ -2877,7 +2894,7 @@ static int ram_save_live(Monitor *mon, QEMUFile *f, int stage, void *opaque)
             break;
     }
 
-    bwidth = get_clock() - bwidth;
+    bwidth = qemu_get_clock_ns(rt_clock) - bwidth;
     bwidth = (bytes_transferred - bytes_transferred_last) / bwidth;
 
     /* if we haven't transferred anything this round, force expected_time to a