When all cpus are sleeping (e.g in WFI), to avoid a deadlock
in the main_loop, wake it up in order to start the warp timer.
Signed-off-by: Clement Deschamps <clement.descha...@greensocs.com>
---
cpus.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/cpus.c b/cpus.c
index bb2a511483..798d43623a 100644
--- a/cpus.c
+++ b/cpus.c
@@ -1554,6 +1554,14 @@ static void *qemu_tcg_rr_cpu_thread_fn(void *arg)
atomic_mb_set(&cpu->exit_request, 0);
}
+ if (use_icount && all_cpu_threads_idle()) {
+ /*
+ * When all cpus are sleeping (e.g in WFI), to avoid a deadlock
+ * in the main_loop, wake it up in order to start the warp timer.
+ */
+ qemu_notify_event();
+ }
+
qemu_tcg_rr_wait_io_event(cpu ? cpu : first_cpu);
deal_with_unplugged_cpus();
}
--
2.19.1
