For good measure, ensure that the following sequence:
thread 1 calls qemu_mutex_lock_iothread
thread 2 calls qemu_mutex_lock_iothread
VCPU thread are created
VCPU thread enters execution loop
results in the VCPU threads letting the other two threads run
and obeying iothread_requesting_mutex even if the VCPUs are
not halted. To do this, check iothread_requesting_mutex
before execution starts.
Tested-by: Leon Alrae <leon.alrae@imgtec.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
}
}
+ /* process any pending work */
+ exit_request = 1;
+
while (1) {
tcg_exec_all();
void qemu_mutex_lock_iothread(void)
{
+ atomic_inc(&iothread_requesting_mutex);
if (!tcg_enabled() || !first_cpu) {
qemu_mutex_lock(&qemu_global_mutex);
+ atomic_dec(&iothread_requesting_mutex);
} else {
- atomic_inc(&iothread_requesting_mutex);
if (qemu_mutex_trylock(&qemu_global_mutex)) {
qemu_cpu_kick_thread(first_cpu);
qemu_mutex_lock(&qemu_global_mutex);