+static bool start_hv_tscdeadline(struct kvm_lapic *apic)
+{
+ u64 tscdeadline = apic->lapic_timer.tscdeadline;
+
+ if (atomic_read(&apic->lapic_timer.pending) ||
+ kvm_x86_ops->set_hv_timer(apic->vcpu, tscdeadline)) {
+ if (apic->lapic_timer.hv_timer_in_use)
+ cancel_hv_tscdeadline(apic);
+ } else {
+ apic->lapic_timer.hv_timer_in_use = true;
+ hrtimer_cancel(&apic->lapic_timer.timer);
+
+ /* In case the sw timer triggered in the window */
+ if (atomic_read(&apic->lapic_timer.pending))
+ cancel_hv_tscdeadline(apic);
+ }
+ trace_kvm_hv_timer_state(apic->vcpu->vcpu_id,
+ apic->lapic_timer.hv_timer_in_use);
+ return apic->lapic_timer.hv_timer_in_use;
+}
+