[PATCH v4 16/32] tests/qtest: remove clock_steps from virtio tests

[Alex Bennée]

In the qtest environment time will not step forward if the system is
paused (timers disabled) or we have no timer events to fire. As a
result VirtIO events are responded to directly and we don't need to
step time forward.

We still do timeout processing to handle the fact the target QEMU may
not be ready to respond right away. This will usually be due to a slow
CI system or if QEMU is running under something like rr.

Future qtest patches will assert that time actually changes when a
step is requested.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Fabiano Rosas <farosas@suse.de>

---
v2
  - s/with/when/
  - drop clock_step entirely
---
 tests/qtest/libqos/virtio.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/tests/qtest/libqos/virtio.c b/tests/qtest/libqos/virtio.c
index a21b6eee9c..2e7979652f 100644
--- a/tests/qtest/libqos/virtio.c
+++ b/tests/qtest/libqos/virtio.c
@@ -170,7 +170,6 @@ void qvirtio_wait_queue_isr(QTestState *qts, QVirtioDevice 
*d,
     gint64 start_time = g_get_monotonic_time();
 
     for (;;) {
-        qtest_clock_step(qts, 100);
         if (d->bus->get_queue_isr_status(d, vq)) {
             return;
         }
@@ -192,7 +191,6 @@ uint8_t qvirtio_wait_status_byte_no_isr(QTestState *qts, 
QVirtioDevice *d,
     uint8_t val;
 
     while ((val = qtest_readb(qts, addr)) == 0xff) {
-        qtest_clock_step(qts, 100);
         g_assert(!d->bus->get_queue_isr_status(d, vq));
         g_assert(g_get_monotonic_time() - start_time <= timeout_us);
     }
@@ -219,14 +217,12 @@ void qvirtio_wait_used_elem(QTestState *qts, 
QVirtioDevice *d,
     for (;;) {
         uint32_t got_desc_idx;
 
-        qtest_clock_step(qts, 100);
 
         if (d->bus->get_queue_isr_status(d, vq) &&
             qvirtqueue_get_buf(qts, vq, &got_desc_idx, len)) {
             g_assert_cmpint(got_desc_idx, ==, desc_idx);
             return;
         }
-
         g_assert(g_get_monotonic_time() - start_time <= timeout_us);
     }
 }
-- 
2.39.5