sysemu: generalise qtest_warp_clock as qemu_clock_advance_virtual_time

Move the key functionality of moving time forward into the clock
sub-system itself. This will allow us to plumb in time control into
plugins.

Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20240620152220.2192768-7-alex.bennee@linaro.org>

1 files changed, 26 insertions, 0 deletions

diff --git a/util/qemu-timer.c b/util/qemu-timer.c
index 6a0de33dd2..213114be68 100644
--- a/util/qemu-timer.c
+++ b/util/qemu-timer.c
@@ -645,6 +645,11 @@ int64_t qemu_clock_get_ns(QEMUClockType type)
     }
 }
 
+static void qemu_virtual_clock_set_ns(int64_t time)
+{
+    return cpus_set_virtual_clock(time);
+}
+
 void init_clocks(QEMUTimerListNotifyCB *notify_cb)
 {
     QEMUClockType type;
@@ -675,3 +680,24 @@ bool qemu_clock_run_all_timers(void)
 
     return progress;
 }
+
+int64_t qemu_clock_advance_virtual_time(int64_t dest)
+{
+    int64_t clock = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
+    AioContext *aio_context;
+    aio_context = qemu_get_aio_context();
+    while (clock < dest) {
+        int64_t deadline = qemu_clock_deadline_ns_all(QEMU_CLOCK_VIRTUAL,
+                                                      QEMU_TIMER_ATTR_ALL);
+        int64_t warp = qemu_soonest_timeout(dest - clock, deadline);
+
+        qemu_virtual_clock_set_ns(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + warp);
+
+        qemu_clock_run_timers(QEMU_CLOCK_VIRTUAL);
+        timerlist_run_timers(aio_context->tlg.tl[QEMU_CLOCK_VIRTUAL]);
+        clock = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
+    }
+    qemu_clock_notify(QEMU_CLOCK_VIRTUAL);
+
+    return clock;
+}