56 static unsigned long ioapic_read_indirect(struct kvm_ioapic *ioapic,  in ioapic_read_indirect()  argument
62 	switch (ioapic->ioregsel) {  in ioapic_read_indirect()
70 		result = ((ioapic->id & 0xf) << 24);  in ioapic_read_indirect()
75 			u32 redir_index = (ioapic->ioregsel - 0x10) >> 1;  in ioapic_read_indirect()
80 					ioapic->redirtbl[redir_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_ID);  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()
129 		ioapic->rtc_status.pending_eoi++;  in __rtc_irq_eoi_tracking_restore_one()
132 		ioapic->rtc_status.pending_eoi--;  in __rtc_irq_eoi_tracking_restore_one()
133 		rtc_status_pending_eoi_check_valid(ioapic);  in __rtc_irq_eoi_tracking_restore_one()
139 	struct kvm_ioapic *ioapic = vcpu->kvm->arch.vioapic;  in kvm_rtc_eoi_tracking_restore_one()  local
141 	spin_lock(&ioapic->lock);  in kvm_rtc_eoi_tracking_restore_one()
143 	spin_unlock(&ioapic->lock);  in kvm_rtc_eoi_tracking_restore_one()
146 static void kvm_rtc_eoi_tracking_restore_all(struct kvm_ioapic *ioapic)  in kvm_rtc_eoi_tracking_restore_all()  argument
154 	rtc_irq_eoi_tracking_reset(ioapic);  in kvm_rtc_eoi_tracking_restore_all()
155 	kvm_for_each_vcpu(i, vcpu, ioapic->kvm)  in kvm_rtc_eoi_tracking_restore_all()
159 static void rtc_irq_eoi(struct kvm_ioapic *ioapic, struct kvm_vcpu *vcpu)  in rtc_irq_eoi()  argument
162 			       ioapic->rtc_status.dest_map.map)) {  in rtc_irq_eoi()
163 		--ioapic->rtc_status.pending_eoi;  in rtc_irq_eoi()
164 		rtc_status_pending_eoi_check_valid(ioapic);  in rtc_irq_eoi()
168 static bool rtc_irq_check_coalesced(struct kvm_ioapic *ioapic)  in rtc_irq_check_coalesced()  argument
170 	if (ioapic->rtc_status.pending_eoi > 0)  in rtc_irq_check_coalesced()
176 static int ioapic_set_irq(struct kvm_ioapic *ioapic, unsigned int irq,  in ioapic_set_irq()  argument
184 	entry = ioapic->redirtbl[irq];  in ioapic_set_irq()
188 		ioapic->irr &= ~mask;  in ioapic_set_irq()
205 		rtc_irq_check_coalesced(ioapic)) {  in ioapic_set_irq()
210 	old_irr = ioapic->irr;  in ioapic_set_irq()
211 	ioapic->irr |= mask;  in ioapic_set_irq()
213 		ioapic->irr_delivered &= ~mask;  in ioapic_set_irq()
214 		if (old_irr == ioapic->irr) {  in ioapic_set_irq()
220 	ret = ioapic_service(ioapic, irq, line_status);  in ioapic_set_irq()
227 static void kvm_ioapic_inject_all(struct kvm_ioapic *ioapic, unsigned long irr)  in kvm_ioapic_inject_all()  argument
231 	rtc_irq_eoi_tracking_reset(ioapic);  in kvm_ioapic_inject_all()
233 		ioapic_set_irq(ioapic, idx, 1, true);  in kvm_ioapic_inject_all()
235 	kvm_rtc_eoi_tracking_restore_all(ioapic);  in kvm_ioapic_inject_all()
241 	struct kvm_ioapic *ioapic = vcpu->kvm->arch.vioapic;  in kvm_ioapic_scan_entry()  local
242 	struct dest_map *dest_map = &ioapic->rtc_status.dest_map;  in kvm_ioapic_scan_entry()
246 	spin_lock(&ioapic->lock);  in kvm_ioapic_scan_entry()
254 		e = &ioapic->redirtbl[index];  in kvm_ioapic_scan_entry()
256 		    kvm_irq_has_notifier(ioapic->kvm, KVM_IRQCHIP_IOAPIC, index) ||  in kvm_ioapic_scan_entry()
265 	spin_unlock(&ioapic->lock);  in kvm_ioapic_scan_entry()
275 static void ioapic_write_indirect(struct kvm_ioapic *ioapic, u32 val)  in ioapic_write_indirect()  argument
282 	switch (ioapic->ioregsel) {  in ioapic_write_indirect()
288 		ioapic->id = (val >> 24) & 0xf;  in ioapic_write_indirect()
295 		index = (ioapic->ioregsel - 0x10) >> 1;  in ioapic_write_indirect()
300 		e = &ioapic->redirtbl[index];  in ioapic_write_indirect()
305 		if (ioapic->ioregsel & 1) {  in ioapic_write_indirect()
326 			kvm_fire_mask_notifiers(ioapic->kvm, KVM_IRQCHIP_IOAPIC, index, mask_after);  in ioapic_write_indirect()
328 		    && ioapic->irr & (1 << index))  in ioapic_write_indirect()
329 			ioapic_service(ioapic, index, false);  in ioapic_write_indirect()
330 		kvm_make_scan_ioapic_request(ioapic->kvm);  in ioapic_write_indirect()
335 static int ioapic_service(struct kvm_ioapic *ioapic, int irq, bool line_status)  in ioapic_service()  argument
337 	union kvm_ioapic_redirect_entry *entry = &ioapic->redirtbl[irq];  in ioapic_service()
362 		ioapic->irr_delivered |= 1 << irq;  in ioapic_service()
371 		BUG_ON(ioapic->rtc_status.pending_eoi != 0);  in ioapic_service()
372 		ret = kvm_irq_delivery_to_apic(ioapic->kvm, NULL, &irqe,  in ioapic_service()
373 					       &ioapic->rtc_status.dest_map);  in ioapic_service()
374 		ioapic->rtc_status.pending_eoi = (ret < 0 ? 0 : ret);  in ioapic_service()
376 		ret = kvm_irq_delivery_to_apic(ioapic->kvm, NULL, &irqe, NULL);  in ioapic_service()
384 int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int irq_source_id,  in kvm_ioapic_set_irq()  argument
391 	spin_lock(&ioapic->lock);  in kvm_ioapic_set_irq()
392 	irq_level = __kvm_irq_line_state(&ioapic->irq_states[irq],  in kvm_ioapic_set_irq()
394 	ret = ioapic_set_irq(ioapic, irq, irq_level, line_status);  in kvm_ioapic_set_irq()
396 	spin_unlock(&ioapic->lock);  in kvm_ioapic_set_irq()
401 void kvm_ioapic_clear_all(struct kvm_ioapic *ioapic, int irq_source_id)  in kvm_ioapic_clear_all()  argument
405 	spin_lock(&ioapic->lock);  in kvm_ioapic_clear_all()
407 		__clear_bit(irq_source_id, &ioapic->irq_states[i]);  in kvm_ioapic_clear_all()
408 	spin_unlock(&ioapic->lock);  in kvm_ioapic_clear_all()
414 	struct kvm_ioapic *ioapic = container_of(work, struct kvm_ioapic,  in kvm_ioapic_eoi_inject_work()  local
416 	spin_lock(&ioapic->lock);  in kvm_ioapic_eoi_inject_work()
418 		union kvm_ioapic_redirect_entry *ent = &ioapic->redirtbl[i];  in kvm_ioapic_eoi_inject_work()
423 		if (ioapic->irr & (1 << i) && !ent->fields.remote_irr)  in kvm_ioapic_eoi_inject_work()
424 			ioapic_service(ioapic, i, false);  in kvm_ioapic_eoi_inject_work()
426 	spin_unlock(&ioapic->lock);  in kvm_ioapic_eoi_inject_work()
432 			struct kvm_ioapic *ioapic, int vector, int trigger_mode)  in __kvm_ioapic_update_eoi()  argument
434 	struct dest_map *dest_map = &ioapic->rtc_status.dest_map;  in __kvm_ioapic_update_eoi()
441 		rtc_irq_eoi(ioapic, vcpu);  in __kvm_ioapic_update_eoi()
444 		union kvm_ioapic_redirect_entry *ent = &ioapic->redirtbl[i];  in __kvm_ioapic_update_eoi()
457 		spin_unlock(&ioapic->lock);  in __kvm_ioapic_update_eoi()
458 		kvm_notify_acked_irq(ioapic->kvm, KVM_IRQCHIP_IOAPIC, i);  in __kvm_ioapic_update_eoi()
459 		spin_lock(&ioapic->lock);  in __kvm_ioapic_update_eoi()
467 		if (!ent->fields.mask && (ioapic->irr & (1 << i))) {  in __kvm_ioapic_update_eoi()
468 			++ioapic->irq_eoi[i];  in __kvm_ioapic_update_eoi()
469 			if (ioapic->irq_eoi[i] == IOAPIC_SUCCESSIVE_IRQ_MAX_COUNT) {  in __kvm_ioapic_update_eoi()
478 				schedule_delayed_work(&ioapic->eoi_inject, HZ / 100);  in __kvm_ioapic_update_eoi()
479 				ioapic->irq_eoi[i] = 0;  in __kvm_ioapic_update_eoi()
482 				ioapic_service(ioapic, i, false);  in __kvm_ioapic_update_eoi()
485 			ioapic->irq_eoi[i] = 0;  in __kvm_ioapic_update_eoi()
492 	struct kvm_ioapic *ioapic = vcpu->kvm->arch.vioapic;  in kvm_ioapic_update_eoi()  local
494 	spin_lock(&ioapic->lock);  in kvm_ioapic_update_eoi()
495 	__kvm_ioapic_update_eoi(vcpu, ioapic, vector, trigger_mode);  in kvm_ioapic_update_eoi()
496 	spin_unlock(&ioapic->lock);  in kvm_ioapic_update_eoi()
504 static inline int ioapic_in_range(struct kvm_ioapic *ioapic, gpa_t addr)  in ioapic_in_range()  argument
506 	return ((addr >= ioapic->base_address &&  in ioapic_in_range()
507 		 (addr < ioapic->base_address + IOAPIC_MEM_LENGTH)));  in ioapic_in_range()
513 	struct kvm_ioapic *ioapic = to_ioapic(this);  in ioapic_mmio_read()  local
515 	if (!ioapic_in_range(ioapic, addr))  in ioapic_mmio_read()
522 	spin_lock(&ioapic->lock);  in ioapic_mmio_read()
525 		result = ioapic->ioregsel;  in ioapic_mmio_read()
529 		result = ioapic_read_indirect(ioapic, addr, len);  in ioapic_mmio_read()
536 	spin_unlock(&ioapic->lock);  in ioapic_mmio_read()
556 	struct kvm_ioapic *ioapic = to_ioapic(this);  in ioapic_mmio_write()  local
558 	if (!ioapic_in_range(ioapic, addr))  in ioapic_mmio_write()
582 	spin_lock(&ioapic->lock);  in ioapic_mmio_write()
585 		ioapic->ioregsel = data & 0xFF; /* 8-bit register */  in ioapic_mmio_write()
589 		ioapic_write_indirect(ioapic, data);  in ioapic_mmio_write()
595 	spin_unlock(&ioapic->lock);  in ioapic_mmio_write()
599 static void kvm_ioapic_reset(struct kvm_ioapic *ioapic)  in kvm_ioapic_reset()  argument
603 	cancel_delayed_work_sync(&ioapic->eoi_inject);  in kvm_ioapic_reset()
605 		ioapic->redirtbl[i].fields.mask = 1;  in kvm_ioapic_reset()
606 	ioapic->base_address = IOAPIC_DEFAULT_BASE_ADDRESS;  in kvm_ioapic_reset()
607 	ioapic->ioregsel = 0;  in kvm_ioapic_reset()
608 	ioapic->irr = 0;  in kvm_ioapic_reset()
609 	ioapic->irr_delivered = 0;  in kvm_ioapic_reset()
610 	ioapic->id = 0;  in kvm_ioapic_reset()
611 	memset(ioapic->irq_eoi, 0x00, sizeof(ioapic->irq_eoi));  in kvm_ioapic_reset()
612 	rtc_irq_eoi_tracking_reset(ioapic);  in kvm_ioapic_reset()
622 	struct kvm_ioapic *ioapic;  in kvm_ioapic_init()  local
625 	ioapic = kzalloc(sizeof(struct kvm_ioapic), GFP_KERNEL);  in kvm_ioapic_init()
626 	if (!ioapic)  in kvm_ioapic_init()
628 	spin_lock_init(&ioapic->lock);  in kvm_ioapic_init()
629 	INIT_DELAYED_WORK(&ioapic->eoi_inject, kvm_ioapic_eoi_inject_work);  in kvm_ioapic_init()
630 	kvm->arch.vioapic = ioapic;  in kvm_ioapic_init()
631 	kvm_ioapic_reset(ioapic);  in kvm_ioapic_init()
632 	kvm_iodevice_init(&ioapic->dev, &ioapic_mmio_ops);  in kvm_ioapic_init()
633 	ioapic->kvm = kvm;  in kvm_ioapic_init()
635 	ret = kvm_io_bus_register_dev(kvm, KVM_MMIO_BUS, ioapic->base_address,  in kvm_ioapic_init()
636 				      IOAPIC_MEM_LENGTH, &ioapic->dev);  in kvm_ioapic_init()
640 		kfree(ioapic);  in kvm_ioapic_init()
648 	struct kvm_ioapic *ioapic = kvm->arch.vioapic;  in kvm_ioapic_destroy()  local
650 	if (!ioapic)  in kvm_ioapic_destroy()
653 	cancel_delayed_work_sync(&ioapic->eoi_inject);  in kvm_ioapic_destroy()
655 	kvm_io_bus_unregister_dev(kvm, KVM_MMIO_BUS, &ioapic->dev);  in kvm_ioapic_destroy()
658 	kfree(ioapic);  in kvm_ioapic_destroy()
663 	struct kvm_ioapic *ioapic = kvm->arch.vioapic;  in kvm_get_ioapic()  local
665 	spin_lock(&ioapic->lock);  in kvm_get_ioapic()
666 	memcpy(state, ioapic, sizeof(struct kvm_ioapic_state));  in kvm_get_ioapic()
667 	state->irr &= ~ioapic->irr_delivered;  in kvm_get_ioapic()
668 	spin_unlock(&ioapic->lock);  in kvm_get_ioapic()
673 	struct kvm_ioapic *ioapic = kvm->arch.vioapic;  in kvm_set_ioapic()  local
675 	spin_lock(&ioapic->lock);  in kvm_set_ioapic()
676 	memcpy(ioapic, state, sizeof(struct kvm_ioapic_state));  in kvm_set_ioapic()
677 	ioapic->irr = 0;  in kvm_set_ioapic()
678 	ioapic->irr_delivered = 0;  in kvm_set_ioapic()
680 	kvm_ioapic_inject_all(ioapic, state->irr);  in kvm_set_ioapic()
681 	spin_unlock(&ioapic->lock);  in kvm_set_ioapic()