53 				      struct kvm_ioapic *ioapic,
57 static unsigned long ioapic_read_indirect(struct kvm_ioapic *ioapic)  in ioapic_read_indirect()  argument
61 	switch (ioapic->ioregsel) {  in ioapic_read_indirect()
69 		result = ((ioapic->id & 0xf) << 24);  in ioapic_read_indirect()
74 			u32 redir_index = (ioapic->ioregsel - 0x10) >> 1;  in ioapic_read_indirect()
81 				redir_content = ioapic->redirtbl[index].bits;  in ioapic_read_indirect()
84 			result = (ioapic->ioregsel & 0x1) ?  in ioapic_read_indirect()
94 static void rtc_irq_eoi_tracking_reset(struct kvm_ioapic *ioapic)  in rtc_irq_eoi_tracking_reset()  argument
96 	ioapic->rtc_status.pending_eoi = 0;  in rtc_irq_eoi_tracking_reset()
97 	bitmap_zero(ioapic->rtc_status.dest_map.map, KVM_MAX_VCPU_IDS);  in rtc_irq_eoi_tracking_reset()
100 static void kvm_rtc_eoi_tracking_restore_all(struct kvm_ioapic *ioapic);
102 static void rtc_status_pending_eoi_check_valid(struct kvm_ioapic *ioapic)  in rtc_status_pending_eoi_check_valid()  argument
104 	if (WARN_ON(ioapic->rtc_status.pending_eoi < 0))  in rtc_status_pending_eoi_check_valid()
105 		kvm_rtc_eoi_tracking_restore_all(ioapic);  in rtc_status_pending_eoi_check_valid()
111 	struct kvm_ioapic *ioapic = vcpu->kvm->arch.vioapic;  in __rtc_irq_eoi_tracking_restore_one()  local
112 	struct dest_map *dest_map = &ioapic->rtc_status.dest_map;  in __rtc_irq_eoi_tracking_restore_one()
115 	e = &ioapic->redirtbl[RTC_GSI];  in __rtc_irq_eoi_tracking_restore_one()
130 		ioapic->rtc_status.pending_eoi++;  in __rtc_irq_eoi_tracking_restore_one()
133 		ioapic->rtc_status.pending_eoi--;  in __rtc_irq_eoi_tracking_restore_one()
134 		rtc_status_pending_eoi_check_valid(ioapic);  in __rtc_irq_eoi_tracking_restore_one()
140 	struct kvm_ioapic *ioapic = vcpu->kvm->arch.vioapic;  in kvm_rtc_eoi_tracking_restore_one()  local
142 	spin_lock(&ioapic->lock);  in kvm_rtc_eoi_tracking_restore_one()
144 	spin_unlock(&ioapic->lock);  in kvm_rtc_eoi_tracking_restore_one()
147 static void kvm_rtc_eoi_tracking_restore_all(struct kvm_ioapic *ioapic)  in kvm_rtc_eoi_tracking_restore_all()  argument
155 	rtc_irq_eoi_tracking_reset(ioapic);  in kvm_rtc_eoi_tracking_restore_all()
156 	kvm_for_each_vcpu(i, vcpu, ioapic->kvm)  in kvm_rtc_eoi_tracking_restore_all()
160 static void rtc_irq_eoi(struct kvm_ioapic *ioapic, struct kvm_vcpu *vcpu,  in rtc_irq_eoi()  argument
163 	struct dest_map *dest_map = &ioapic->rtc_status.dest_map;  in rtc_irq_eoi()
169 				ioapic->rtc_status.dest_map.map))) {  in rtc_irq_eoi()
170 		--ioapic->rtc_status.pending_eoi;  in rtc_irq_eoi()
171 		rtc_status_pending_eoi_check_valid(ioapic);  in rtc_irq_eoi()
175 static bool rtc_irq_check_coalesced(struct kvm_ioapic *ioapic)  in rtc_irq_check_coalesced()  argument
177 	if (ioapic->rtc_status.pending_eoi > 0)  in rtc_irq_check_coalesced()
183 static void ioapic_lazy_update_eoi(struct kvm_ioapic *ioapic, int irq)  in ioapic_lazy_update_eoi()  argument
187 	union kvm_ioapic_redirect_entry *entry = &ioapic->redirtbl[irq];  in ioapic_lazy_update_eoi()
189 	kvm_for_each_vcpu(i, vcpu, ioapic->kvm) {  in ioapic_lazy_update_eoi()
200 		rtc_irq_eoi(ioapic, vcpu, entry->fields.vector);  in ioapic_lazy_update_eoi()
205 static int ioapic_set_irq(struct kvm_ioapic *ioapic, unsigned int irq,  in ioapic_set_irq()  argument
213 	entry = ioapic->redirtbl[irq];  in ioapic_set_irq()
217 		ioapic->irr &= ~mask;  in ioapic_set_irq()
228 	if (edge && kvm_apicv_activated(ioapic->kvm))  in ioapic_set_irq()
229 		ioapic_lazy_update_eoi(ioapic, irq);  in ioapic_set_irq()
243 		rtc_irq_check_coalesced(ioapic)) {  in ioapic_set_irq()
248 	old_irr = ioapic->irr;  in ioapic_set_irq()
249 	ioapic->irr |= mask;  in ioapic_set_irq()
251 		ioapic->irr_delivered &= ~mask;  in ioapic_set_irq()
252 		if (old_irr == ioapic->irr) {  in ioapic_set_irq()
258 	ret = ioapic_service(ioapic, irq, line_status);  in ioapic_set_irq()
265 static void kvm_ioapic_inject_all(struct kvm_ioapic *ioapic, unsigned long irr)  in kvm_ioapic_inject_all()  argument
269 	rtc_irq_eoi_tracking_reset(ioapic);  in kvm_ioapic_inject_all()
271 		ioapic_set_irq(ioapic, idx, 1, true);  in kvm_ioapic_inject_all()
273 	kvm_rtc_eoi_tracking_restore_all(ioapic);  in kvm_ioapic_inject_all()
279 	struct kvm_ioapic *ioapic = vcpu->kvm->arch.vioapic;  in kvm_ioapic_scan_entry()  local
280 	struct dest_map *dest_map = &ioapic->rtc_status.dest_map;  in kvm_ioapic_scan_entry()
284 	spin_lock(&ioapic->lock);  in kvm_ioapic_scan_entry()
292 		e = &ioapic->redirtbl[index];  in kvm_ioapic_scan_entry()
294 		    kvm_irq_has_notifier(ioapic->kvm, KVM_IRQCHIP_IOAPIC, index) ||  in kvm_ioapic_scan_entry()
305 	spin_unlock(&ioapic->lock);  in kvm_ioapic_scan_entry()
315 static void ioapic_write_indirect(struct kvm_ioapic *ioapic, u32 val)  in ioapic_write_indirect()  argument
323 	switch (ioapic->ioregsel) {  in ioapic_write_indirect()
329 		ioapic->id = (val >> 24) & 0xf;  in ioapic_write_indirect()
336 		index = (ioapic->ioregsel - 0x10) >> 1;  in ioapic_write_indirect()
341 		e = &ioapic->redirtbl[index];  in ioapic_write_indirect()
348 		if (ioapic->ioregsel & 1) {  in ioapic_write_indirect()
369 			kvm_fire_mask_notifiers(ioapic->kvm, KVM_IRQCHIP_IOAPIC, index, mask_after);  in ioapic_write_indirect()
371 		    && ioapic->irr & (1 << index))  in ioapic_write_indirect()
372 			ioapic_service(ioapic, index, false);  in ioapic_write_indirect()
386 			kvm_bitmap_or_dest_vcpus(ioapic->kvm, &irq,  in ioapic_write_indirect()
399 				kvm_bitmap_or_dest_vcpus(ioapic->kvm, &irq,  in ioapic_write_indirect()
402 			kvm_make_scan_ioapic_request_mask(ioapic->kvm,  in ioapic_write_indirect()
405 			kvm_make_scan_ioapic_request(ioapic->kvm);  in ioapic_write_indirect()
411 static int ioapic_service(struct kvm_ioapic *ioapic, int irq, bool line_status)  in ioapic_service()  argument
413 	union kvm_ioapic_redirect_entry *entry = &ioapic->redirtbl[irq];  in ioapic_service()
432 		ioapic->irr_delivered |= 1 << irq;  in ioapic_service()
441 		BUG_ON(ioapic->rtc_status.pending_eoi != 0);  in ioapic_service()
442 		ret = kvm_irq_delivery_to_apic(ioapic->kvm, NULL, &irqe,  in ioapic_service()
443 					       &ioapic->rtc_status.dest_map);  in ioapic_service()
444 		ioapic->rtc_status.pending_eoi = (ret < 0 ? 0 : ret);  in ioapic_service()
446 		ret = kvm_irq_delivery_to_apic(ioapic->kvm, NULL, &irqe, NULL);  in ioapic_service()
454 int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int irq_source_id,  in kvm_ioapic_set_irq()  argument
461 	spin_lock(&ioapic->lock);  in kvm_ioapic_set_irq()
462 	irq_level = __kvm_irq_line_state(&ioapic->irq_states[irq],  in kvm_ioapic_set_irq()
464 	ret = ioapic_set_irq(ioapic, irq, irq_level, line_status);  in kvm_ioapic_set_irq()
466 	spin_unlock(&ioapic->lock);  in kvm_ioapic_set_irq()
471 void kvm_ioapic_clear_all(struct kvm_ioapic *ioapic, int irq_source_id)  in kvm_ioapic_clear_all()  argument
475 	spin_lock(&ioapic->lock);  in kvm_ioapic_clear_all()
477 		__clear_bit(irq_source_id, &ioapic->irq_states[i]);  in kvm_ioapic_clear_all()
478 	spin_unlock(&ioapic->lock);  in kvm_ioapic_clear_all()
484 	struct kvm_ioapic *ioapic = container_of(work, struct kvm_ioapic,  in kvm_ioapic_eoi_inject_work()  local
486 	spin_lock(&ioapic->lock);  in kvm_ioapic_eoi_inject_work()
488 		union kvm_ioapic_redirect_entry *ent = &ioapic->redirtbl[i];  in kvm_ioapic_eoi_inject_work()
493 		if (ioapic->irr & (1 << i) && !ent->fields.remote_irr)  in kvm_ioapic_eoi_inject_work()
494 			ioapic_service(ioapic, i, false);  in kvm_ioapic_eoi_inject_work()
496 	spin_unlock(&ioapic->lock);  in kvm_ioapic_eoi_inject_work()
501 				      struct kvm_ioapic *ioapic,  in kvm_ioapic_update_eoi_one()  argument
506 	union kvm_ioapic_redirect_entry *ent = &ioapic->redirtbl[pin];  in kvm_ioapic_update_eoi_one()
516 	spin_unlock(&ioapic->lock);  in kvm_ioapic_update_eoi_one()
517 	kvm_notify_acked_irq(ioapic->kvm, KVM_IRQCHIP_IOAPIC, pin);  in kvm_ioapic_update_eoi_one()
518 	spin_lock(&ioapic->lock);  in kvm_ioapic_update_eoi_one()
526 	if (!ent->fields.mask && (ioapic->irr & (1 << pin))) {  in kvm_ioapic_update_eoi_one()
527 		++ioapic->irq_eoi[pin];  in kvm_ioapic_update_eoi_one()
528 		if (ioapic->irq_eoi[pin] == IOAPIC_SUCCESSIVE_IRQ_MAX_COUNT) {  in kvm_ioapic_update_eoi_one()
537 			schedule_delayed_work(&ioapic->eoi_inject, HZ / 100);  in kvm_ioapic_update_eoi_one()
538 			ioapic->irq_eoi[pin] = 0;  in kvm_ioapic_update_eoi_one()
541 			ioapic_service(ioapic, pin, false);  in kvm_ioapic_update_eoi_one()
544 		ioapic->irq_eoi[pin] = 0;  in kvm_ioapic_update_eoi_one()
551 	struct kvm_ioapic *ioapic = vcpu->kvm->arch.vioapic;  in kvm_ioapic_update_eoi()  local
553 	spin_lock(&ioapic->lock);  in kvm_ioapic_update_eoi()
554 	rtc_irq_eoi(ioapic, vcpu, vector);  in kvm_ioapic_update_eoi()
556 		union kvm_ioapic_redirect_entry *ent = &ioapic->redirtbl[i];  in kvm_ioapic_update_eoi()
560 		kvm_ioapic_update_eoi_one(vcpu, ioapic, trigger_mode, i);  in kvm_ioapic_update_eoi()
562 	spin_unlock(&ioapic->lock);  in kvm_ioapic_update_eoi()
570 static inline int ioapic_in_range(struct kvm_ioapic *ioapic, gpa_t addr)  in ioapic_in_range()  argument
572 	return ((addr >= ioapic->base_address &&  in ioapic_in_range()
573 		 (addr < ioapic->base_address + IOAPIC_MEM_LENGTH)));  in ioapic_in_range()
579 	struct kvm_ioapic *ioapic = to_ioapic(this);  in ioapic_mmio_read()  local
581 	if (!ioapic_in_range(ioapic, addr))  in ioapic_mmio_read()
587 	spin_lock(&ioapic->lock);  in ioapic_mmio_read()
590 		result = ioapic->ioregsel;  in ioapic_mmio_read()
594 		result = ioapic_read_indirect(ioapic);  in ioapic_mmio_read()
601 	spin_unlock(&ioapic->lock);  in ioapic_mmio_read()
621 	struct kvm_ioapic *ioapic = to_ioapic(this);  in ioapic_mmio_write()  local
623 	if (!ioapic_in_range(ioapic, addr))  in ioapic_mmio_write()
645 	spin_lock(&ioapic->lock);  in ioapic_mmio_write()
648 		ioapic->ioregsel = data & 0xFF; /* 8-bit register */  in ioapic_mmio_write()
652 		ioapic_write_indirect(ioapic, data);  in ioapic_mmio_write()
658 	spin_unlock(&ioapic->lock);  in ioapic_mmio_write()
662 static void kvm_ioapic_reset(struct kvm_ioapic *ioapic)  in kvm_ioapic_reset()  argument
666 	cancel_delayed_work_sync(&ioapic->eoi_inject);  in kvm_ioapic_reset()
668 		ioapic->redirtbl[i].fields.mask = 1;  in kvm_ioapic_reset()
669 	ioapic->base_address = IOAPIC_DEFAULT_BASE_ADDRESS;  in kvm_ioapic_reset()
670 	ioapic->ioregsel = 0;  in kvm_ioapic_reset()
671 	ioapic->irr = 0;  in kvm_ioapic_reset()
672 	ioapic->irr_delivered = 0;  in kvm_ioapic_reset()
673 	ioapic->id = 0;  in kvm_ioapic_reset()
674 	memset(ioapic->irq_eoi, 0x00, sizeof(ioapic->irq_eoi));  in kvm_ioapic_reset()
675 	rtc_irq_eoi_tracking_reset(ioapic);  in kvm_ioapic_reset()
685 	struct kvm_ioapic *ioapic;  in kvm_ioapic_init()  local
688 	ioapic = kzalloc(sizeof(struct kvm_ioapic), GFP_KERNEL_ACCOUNT);  in kvm_ioapic_init()
689 	if (!ioapic)  in kvm_ioapic_init()
691 	spin_lock_init(&ioapic->lock);  in kvm_ioapic_init()
692 	INIT_DELAYED_WORK(&ioapic->eoi_inject, kvm_ioapic_eoi_inject_work);  in kvm_ioapic_init()
693 	kvm->arch.vioapic = ioapic;  in kvm_ioapic_init()
694 	kvm_ioapic_reset(ioapic);  in kvm_ioapic_init()
695 	kvm_iodevice_init(&ioapic->dev, &ioapic_mmio_ops);  in kvm_ioapic_init()
696 	ioapic->kvm = kvm;  in kvm_ioapic_init()
698 	ret = kvm_io_bus_register_dev(kvm, KVM_MMIO_BUS, ioapic->base_address,  in kvm_ioapic_init()
699 				      IOAPIC_MEM_LENGTH, &ioapic->dev);  in kvm_ioapic_init()
703 		kfree(ioapic);  in kvm_ioapic_init()
711 	struct kvm_ioapic *ioapic = kvm->arch.vioapic;  in kvm_ioapic_destroy()  local
713 	if (!ioapic)  in kvm_ioapic_destroy()
716 	cancel_delayed_work_sync(&ioapic->eoi_inject);  in kvm_ioapic_destroy()
718 	kvm_io_bus_unregister_dev(kvm, KVM_MMIO_BUS, &ioapic->dev);  in kvm_ioapic_destroy()
721 	kfree(ioapic);  in kvm_ioapic_destroy()
726 	struct kvm_ioapic *ioapic = kvm->arch.vioapic;  in kvm_get_ioapic()  local
728 	spin_lock(&ioapic->lock);  in kvm_get_ioapic()
729 	memcpy(state, ioapic, sizeof(struct kvm_ioapic_state));  in kvm_get_ioapic()
730 	state->irr &= ~ioapic->irr_delivered;  in kvm_get_ioapic()
731 	spin_unlock(&ioapic->lock);  in kvm_get_ioapic()
736 	struct kvm_ioapic *ioapic = kvm->arch.vioapic;  in kvm_set_ioapic()  local
738 	spin_lock(&ioapic->lock);  in kvm_set_ioapic()
739 	memcpy(ioapic, state, sizeof(struct kvm_ioapic_state));  in kvm_set_ioapic()
740 	ioapic->irr = 0;  in kvm_set_ioapic()
741 	ioapic->irr_delivered = 0;  in kvm_set_ioapic()
743 	kvm_ioapic_inject_all(ioapic, state->irr);  in kvm_set_ioapic()
744 	spin_unlock(&ioapic->lock);  in kvm_set_ioapic()