From: Clement Deschamps <clement.descha...@greensocs.com> 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> Message-Id: <20181021142103.19014-1-clement.descha...@greensocs.com> Signed-off-by: Paolo Bonzini <pbonz...@redhat.com> --- cpus.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/cpus.c b/cpus.c index 3978f63..a2b33cc 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(); } -- 1.8.3.1