Replace qemu_gettimeofday() with g_get_real_time()

GLib g_get_real_time() is an alternative to gettimeofday() which allows
to simplify our code.

For semihosting, a few bits are lost on POSIX host, but this shouldn't
be a big concern.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20220307070401.171986-5-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

7 files changed, 35 insertions, 50 deletions

diff --git a/blockdev.c b/blockdev.c
index e46e831212..9230888e34 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -1258,7 +1258,7 @@ static void internal_snapshot_prepare(BlkActionState *common,
     BlockDriverState *bs;
     QEMUSnapshotInfo old_sn, *sn;
     bool ret;
-    qemu_timeval tv;
+    int64_t rt;
     BlockdevSnapshotInternal *internal;
     InternalSnapshotState *state;
     AioContext *aio_context;
@@ -1328,9 +1328,9 @@ static void internal_snapshot_prepare(BlkActionState *common,
     /* 3. take the snapshot */
     sn = &state->sn;
     pstrcpy(sn->name, sizeof(sn->name), name);
-    qemu_gettimeofday(&tv);
-    sn->date_sec = tv.tv_sec;
-    sn->date_nsec = tv.tv_usec * 1000;
+    rt = g_get_real_time();
+    sn->date_sec = rt / G_USEC_PER_SEC;
+    sn->date_nsec = (rt % G_USEC_PER_SEC) * 1000;
     sn->vm_clock_nsec = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
     if (replay_mode != REPLAY_MODE_NONE) {
         sn->icount = replay_get_current_icount();
diff --git a/hw/rtc/m41t80.c b/hw/rtc/m41t80.c
index a00971a67e..e045c864bb 100644
--- a/hw/rtc/m41t80.c
+++ b/hw/rtc/m41t80.c
@@ -47,7 +47,7 @@ static uint8_t m41t80_recv(I2CSlave *i2c)
 {
     M41t80State *s = M41T80(i2c);
     struct tm now;
-    qemu_timeval tv;
+    int64_t rt;
 
     if (s->addr < 0) {
         s->addr = 0;
@@ -57,8 +57,8 @@ static uint8_t m41t80_recv(I2CSlave *i2c)
     }
     switch (s->addr++) {
     case 0:
-        qemu_gettimeofday(&tv);
-        return to_bcd(tv.tv_usec / 10000);
+        rt = g_get_real_time();
+        return to_bcd((rt % G_USEC_PER_SEC) / 10000);
     case 1:
         return to_bcd(now.tm_sec);
     case 2:
diff --git a/hw/virtio/virtio-balloon.c b/hw/virtio/virtio-balloon.c
index 163d244eb4..8f1b38ef5c 100644
--- a/hw/virtio/virtio-balloon.c
+++ b/hw/virtio/virtio-balloon.c
@@ -452,7 +452,6 @@ static void virtio_balloon_receive_stats(VirtIODevice *vdev, VirtQueue *vq)
     VirtQueueElement *elem;
     VirtIOBalloonStat stat;
     size_t offset = 0;
-    qemu_timeval tv;
 
     elem = virtqueue_pop(vq, sizeof(VirtQueueElement));
     if (!elem) {
@@ -484,13 +483,7 @@ static void virtio_balloon_receive_stats(VirtIODevice *vdev, VirtQueue *vq)
             s->stats[tag] = val;
     }
     s->stats_vq_offset = offset;
-
-    if (qemu_gettimeofday(&tv) < 0) {
-        warn_report("%s: failed to get time of day", __func__);
-        goto out;
-    }
-
-    s->stats_last_update = tv.tv_sec;
+    s->stats_last_update = g_get_real_time() / G_USEC_PER_SEC;
 
 out:
     if (balloon_stats_enabled(s)) {
diff --git a/qapi/qmp-event.c b/qapi/qmp-event.c
index 19d3cd0038..0fe0d0a5a6 100644
--- a/qapi/qmp-event.c
+++ b/qapi/qmp-event.c
@@ -20,15 +20,12 @@
 
 static void timestamp_put(QDict *qdict)
 {
-    int err;
     QDict *ts;
-    qemu_timeval tv;
+    int64_t rt = g_get_real_time();
 
-    err = qemu_gettimeofday(&tv);
-    /* Put -1 to indicate failure of getting host time */
     ts = qdict_from_jsonf_nofail("{ 'seconds': %lld, 'microseconds': %lld }",
-                                 err < 0 ? -1LL : (long long)tv.tv_sec,
-                                 err < 0 ? -1LL : (long long)tv.tv_usec);
+                                 (long long)rt / G_USEC_PER_SEC,
+                                 (long long)rt % G_USEC_PER_SEC);
     qdict_put(qdict, "timestamp", ts);
 }
 
diff --git a/qemu-img.c b/qemu-img.c
index 1caddfb23a..cf63db7655 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -3305,11 +3305,11 @@ static int img_snapshot(int argc, char **argv)
     char *filename, *snapshot_name = NULL;
     int c, ret = 0, bdrv_oflags;
     int action = 0;
-    qemu_timeval tv;
     bool quiet = false;
     Error *err = NULL;
     bool image_opts = false;
     bool force_share = false;
+    int64_t rt;
 
     bdrv_oflags = BDRV_O_RDWR;
     /* Parse commandline parameters */
@@ -3406,9 +3406,9 @@ static int img_snapshot(int argc, char **argv)
         memset(&sn, 0, sizeof(sn));
         pstrcpy(sn.name, sizeof(sn.name), snapshot_name);
 
-        qemu_gettimeofday(&tv);
-        sn.date_sec = tv.tv_sec;
-        sn.date_nsec = tv.tv_usec * 1000;
+        rt = g_get_real_time();
+        sn.date_sec = rt / G_USEC_PER_SEC;
+        sn.date_nsec = (rt % G_USEC_PER_SEC) * 1000;
 
         ret = bdrv_snapshot_create(bs, &sn);
         if (ret) {
diff --git a/target/m68k/m68k-semi.c b/target/m68k/m68k-semi.c
index c5c164e096..37343d47e2 100644
--- a/target/m68k/m68k-semi.c
+++ b/target/m68k/m68k-semi.c
@@ -378,19 +378,17 @@ void do_m68k_semihosting(CPUM68KState *env, int nr)
                            arg0, arg1);
             return;
         } else {
-            qemu_timeval tv;
             struct gdb_timeval *p;
-            result = qemu_gettimeofday(&tv);
-            if (result == 0) {
-                if (!(p = lock_user(VERIFY_WRITE,
-                                    arg0, sizeof(struct gdb_timeval), 0))) {
-                    /* FIXME - check error code? */
-                    result = -1;
-                } else {
-                    p->tv_sec = cpu_to_be32(tv.tv_sec);
-                    p->tv_usec = cpu_to_be64(tv.tv_usec);
-                    unlock_user(p, arg0, sizeof(struct gdb_timeval));
-                }
+            int64_t rt = g_get_real_time();
+            p = lock_user(VERIFY_WRITE, arg0, sizeof(struct gdb_timeval), 0);
+            if (!p) {
+                /* FIXME - check error code? */
+                result = -1;
+            } else {
+                result = 0;
+                p->tv_sec = cpu_to_be32(rt / G_USEC_PER_SEC);
+                p->tv_usec = cpu_to_be64(rt % G_USEC_PER_SEC);
+                unlock_user(p, arg0, sizeof(struct gdb_timeval));
             }
         }
         break;
diff --git a/target/nios2/nios2-semi.c b/target/nios2/nios2-semi.c
index 5a7ad0c710..3decf6924c 100644
--- a/target/nios2/nios2-semi.c
+++ b/target/nios2/nios2-semi.c
@@ -400,20 +400,17 @@ void do_nios2_semihosting(CPUNios2State *env)
                            arg0, 0);
             return;
         } else {
-            qemu_timeval tv;
             struct gdb_timeval *p;
-            result = qemu_gettimeofday(&tv);
-            if (result == 0) {
-                p = lock_user(VERIFY_WRITE, arg0, sizeof(struct gdb_timeval),
-                              0);
-                if (!p) {
-                    result = -1;
-                    errno = EFAULT;
-                } else {
-                    p->tv_sec = cpu_to_be32(tv.tv_sec);
-                    p->tv_usec = cpu_to_be64(tv.tv_usec);
-                    unlock_user(p, arg0, sizeof(struct gdb_timeval));
-                }
+            int64_t rt = g_get_real_time();
+            p = lock_user(VERIFY_WRITE, arg0, sizeof(struct gdb_timeval), 0);
+            if (!p) {
+                result = -1;
+                errno = EFAULT;
+            } else {
+                result = 0;
+                p->tv_sec = cpu_to_be32(rt / G_USEC_PER_SEC);
+                p->tv_usec = cpu_to_be64(rt % G_USEC_PER_SEC);
+                unlock_user(p, arg0, sizeof(struct gdb_timeval));
             }
         }
         break;