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, KVM_MAX_VCPUS);  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
114 	e = &ioapic->redirtbl[RTC_GSI];  in __rtc_irq_eoi_tracking_restore_one()
120 	old_val = test_bit(vcpu->vcpu_id, ioapic->rtc_status.dest_map);  in __rtc_irq_eoi_tracking_restore_one()
126 		__set_bit(vcpu->vcpu_id, ioapic->rtc_status.dest_map);  in __rtc_irq_eoi_tracking_restore_one()
127 		ioapic->rtc_status.pending_eoi++;  in __rtc_irq_eoi_tracking_restore_one()
129 		__clear_bit(vcpu->vcpu_id, ioapic->rtc_status.dest_map);  in __rtc_irq_eoi_tracking_restore_one()
130 		ioapic->rtc_status.pending_eoi--;  in __rtc_irq_eoi_tracking_restore_one()
131 		rtc_status_pending_eoi_check_valid(ioapic);  in __rtc_irq_eoi_tracking_restore_one()
137 	struct kvm_ioapic *ioapic = vcpu->kvm->arch.vioapic;  in kvm_rtc_eoi_tracking_restore_one()  local
139 	spin_lock(&ioapic->lock);  in kvm_rtc_eoi_tracking_restore_one()
141 	spin_unlock(&ioapic->lock);  in kvm_rtc_eoi_tracking_restore_one()
144 static void kvm_rtc_eoi_tracking_restore_all(struct kvm_ioapic *ioapic)  in kvm_rtc_eoi_tracking_restore_all()  argument
152 	rtc_irq_eoi_tracking_reset(ioapic);  in kvm_rtc_eoi_tracking_restore_all()
153 	kvm_for_each_vcpu(i, vcpu, ioapic->kvm)  in kvm_rtc_eoi_tracking_restore_all()
157 static void rtc_irq_eoi(struct kvm_ioapic *ioapic, struct kvm_vcpu *vcpu)  in rtc_irq_eoi()  argument
159 	if (test_and_clear_bit(vcpu->vcpu_id, ioapic->rtc_status.dest_map)) {  in rtc_irq_eoi()
160 		--ioapic->rtc_status.pending_eoi;  in rtc_irq_eoi()
161 		rtc_status_pending_eoi_check_valid(ioapic);  in rtc_irq_eoi()
165 static bool rtc_irq_check_coalesced(struct kvm_ioapic *ioapic)  in rtc_irq_check_coalesced()  argument
167 	if (ioapic->rtc_status.pending_eoi > 0)  in rtc_irq_check_coalesced()
173 static int ioapic_set_irq(struct kvm_ioapic *ioapic, unsigned int irq,  in ioapic_set_irq()  argument
181 	entry = ioapic->redirtbl[irq];  in ioapic_set_irq()
185 		ioapic->irr &= ~mask;  in ioapic_set_irq()
202 		rtc_irq_check_coalesced(ioapic)) {  in ioapic_set_irq()
207 	old_irr = ioapic->irr;  in ioapic_set_irq()
208 	ioapic->irr |= mask;  in ioapic_set_irq()
210 		ioapic->irr_delivered &= ~mask;  in ioapic_set_irq()
211 	if ((edge && old_irr == ioapic->irr) ||  in ioapic_set_irq()
217 	ret = ioapic_service(ioapic, irq, line_status);  in ioapic_set_irq()
224 static void kvm_ioapic_inject_all(struct kvm_ioapic *ioapic, unsigned long irr)  in kvm_ioapic_inject_all()  argument
228 	rtc_irq_eoi_tracking_reset(ioapic);  in kvm_ioapic_inject_all()
230 		ioapic_set_irq(ioapic, idx, 1, true);  in kvm_ioapic_inject_all()
232 	kvm_rtc_eoi_tracking_restore_all(ioapic);  in kvm_ioapic_inject_all()
236 static void update_handled_vectors(struct kvm_ioapic *ioapic)  in update_handled_vectors()  argument
243 		__set_bit(ioapic->redirtbl[i].fields.vector, handled_vectors);  in update_handled_vectors()
244 	memcpy(ioapic->handled_vectors, handled_vectors,  in update_handled_vectors()
252 	struct kvm_ioapic *ioapic = vcpu->kvm->arch.vioapic;  in kvm_ioapic_scan_entry()  local
256 	spin_lock(&ioapic->lock);  in kvm_ioapic_scan_entry()
258 		e = &ioapic->redirtbl[index];  in kvm_ioapic_scan_entry()
260 		    kvm_irq_has_notifier(ioapic->kvm, KVM_IRQCHIP_IOAPIC, index) ||  in kvm_ioapic_scan_entry()
272 	spin_unlock(&ioapic->lock);  in kvm_ioapic_scan_entry()
277 	struct kvm_ioapic *ioapic = kvm->arch.vioapic;  in kvm_vcpu_request_scan_ioapic()  local
279 	if (!ioapic)  in kvm_vcpu_request_scan_ioapic()
284 static void ioapic_write_indirect(struct kvm_ioapic *ioapic, u32 val)  in ioapic_write_indirect()  argument
290 	switch (ioapic->ioregsel) {  in ioapic_write_indirect()
296 		ioapic->id = (val >> 24) & 0xf;  in ioapic_write_indirect()
303 		index = (ioapic->ioregsel - 0x10) >> 1;  in ioapic_write_indirect()
308 		e = &ioapic->redirtbl[index];  in ioapic_write_indirect()
310 		if (ioapic->ioregsel & 1) {  in ioapic_write_indirect()
318 		update_handled_vectors(ioapic);  in ioapic_write_indirect()
321 			kvm_fire_mask_notifiers(ioapic->kvm, KVM_IRQCHIP_IOAPIC, index, mask_after);  in ioapic_write_indirect()
323 		    && ioapic->irr & (1 << index))  in ioapic_write_indirect()
324 			ioapic_service(ioapic, index, false);  in ioapic_write_indirect()
325 		kvm_vcpu_request_scan_ioapic(ioapic->kvm);  in ioapic_write_indirect()
330 static int ioapic_service(struct kvm_ioapic *ioapic, int irq, bool line_status)  in ioapic_service()  argument
332 	union kvm_ioapic_redirect_entry *entry = &ioapic->redirtbl[irq];  in ioapic_service()
354 		ioapic->irr_delivered |= 1 << irq;  in ioapic_service()
363 		BUG_ON(ioapic->rtc_status.pending_eoi != 0);  in ioapic_service()
364 		ret = kvm_irq_delivery_to_apic(ioapic->kvm, NULL, &irqe,  in ioapic_service()
365 				ioapic->rtc_status.dest_map);  in ioapic_service()
366 		ioapic->rtc_status.pending_eoi = (ret < 0 ? 0 : ret);  in ioapic_service()
368 		ret = kvm_irq_delivery_to_apic(ioapic->kvm, NULL, &irqe, NULL);  in ioapic_service()
376 int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int irq_source_id,  in kvm_ioapic_set_irq()  argument
383 	spin_lock(&ioapic->lock);  in kvm_ioapic_set_irq()
384 	irq_level = __kvm_irq_line_state(&ioapic->irq_states[irq],  in kvm_ioapic_set_irq()
386 	ret = ioapic_set_irq(ioapic, irq, irq_level, line_status);  in kvm_ioapic_set_irq()
388 	spin_unlock(&ioapic->lock);  in kvm_ioapic_set_irq()
393 void kvm_ioapic_clear_all(struct kvm_ioapic *ioapic, int irq_source_id)  in kvm_ioapic_clear_all()  argument
397 	spin_lock(&ioapic->lock);  in kvm_ioapic_clear_all()
399 		__clear_bit(irq_source_id, &ioapic->irq_states[i]);  in kvm_ioapic_clear_all()
400 	spin_unlock(&ioapic->lock);  in kvm_ioapic_clear_all()
406 	struct kvm_ioapic *ioapic = container_of(work, struct kvm_ioapic,  in kvm_ioapic_eoi_inject_work()  local
408 	spin_lock(&ioapic->lock);  in kvm_ioapic_eoi_inject_work()
410 		union kvm_ioapic_redirect_entry *ent = &ioapic->redirtbl[i];  in kvm_ioapic_eoi_inject_work()
415 		if (ioapic->irr & (1 << i) && !ent->fields.remote_irr)  in kvm_ioapic_eoi_inject_work()
416 			ioapic_service(ioapic, i, false);  in kvm_ioapic_eoi_inject_work()
418 	spin_unlock(&ioapic->lock);  in kvm_ioapic_eoi_inject_work()
424 			struct kvm_ioapic *ioapic, int vector, int trigger_mode)  in __kvm_ioapic_update_eoi()  argument
430 		union kvm_ioapic_redirect_entry *ent = &ioapic->redirtbl[i];  in __kvm_ioapic_update_eoi()
436 			rtc_irq_eoi(ioapic, vcpu);  in __kvm_ioapic_update_eoi()
445 		spin_unlock(&ioapic->lock);  in __kvm_ioapic_update_eoi()
446 		kvm_notify_acked_irq(ioapic->kvm, KVM_IRQCHIP_IOAPIC, i);  in __kvm_ioapic_update_eoi()
447 		spin_lock(&ioapic->lock);  in __kvm_ioapic_update_eoi()
455 		if (!ent->fields.mask && (ioapic->irr & (1 << i))) {  in __kvm_ioapic_update_eoi()
456 			++ioapic->irq_eoi[i];  in __kvm_ioapic_update_eoi()
457 			if (ioapic->irq_eoi[i] == IOAPIC_SUCCESSIVE_IRQ_MAX_COUNT) {  in __kvm_ioapic_update_eoi()
466 				schedule_delayed_work(&ioapic->eoi_inject, HZ / 100);  in __kvm_ioapic_update_eoi()
467 				ioapic->irq_eoi[i] = 0;  in __kvm_ioapic_update_eoi()
470 				ioapic_service(ioapic, i, false);  in __kvm_ioapic_update_eoi()
473 			ioapic->irq_eoi[i] = 0;  in __kvm_ioapic_update_eoi()
480 	struct kvm_ioapic *ioapic = vcpu->kvm->arch.vioapic;  in kvm_ioapic_update_eoi()  local
482 	spin_lock(&ioapic->lock);  in kvm_ioapic_update_eoi()
483 	__kvm_ioapic_update_eoi(vcpu, ioapic, vector, trigger_mode);  in kvm_ioapic_update_eoi()
484 	spin_unlock(&ioapic->lock);  in kvm_ioapic_update_eoi()
492 static inline int ioapic_in_range(struct kvm_ioapic *ioapic, gpa_t addr)  in ioapic_in_range()  argument
494 	return ((addr >= ioapic->base_address &&  in ioapic_in_range()
495 		 (addr < ioapic->base_address + IOAPIC_MEM_LENGTH)));  in ioapic_in_range()
501 	struct kvm_ioapic *ioapic = to_ioapic(this);  in ioapic_mmio_read()  local
503 	if (!ioapic_in_range(ioapic, addr))  in ioapic_mmio_read()
510 	spin_lock(&ioapic->lock);  in ioapic_mmio_read()
513 		result = ioapic->ioregsel;  in ioapic_mmio_read()
517 		result = ioapic_read_indirect(ioapic, addr, len);  in ioapic_mmio_read()
524 	spin_unlock(&ioapic->lock);  in ioapic_mmio_read()
544 	struct kvm_ioapic *ioapic = to_ioapic(this);  in ioapic_mmio_write()  local
546 	if (!ioapic_in_range(ioapic, addr))  in ioapic_mmio_write()
570 	spin_lock(&ioapic->lock);  in ioapic_mmio_write()
573 		ioapic->ioregsel = data & 0xFF; /* 8-bit register */  in ioapic_mmio_write()
577 		ioapic_write_indirect(ioapic, data);  in ioapic_mmio_write()
583 	spin_unlock(&ioapic->lock);  in ioapic_mmio_write()
587 static void kvm_ioapic_reset(struct kvm_ioapic *ioapic)  in kvm_ioapic_reset()  argument
591 	cancel_delayed_work_sync(&ioapic->eoi_inject);  in kvm_ioapic_reset()
593 		ioapic->redirtbl[i].fields.mask = 1;  in kvm_ioapic_reset()
594 	ioapic->base_address = IOAPIC_DEFAULT_BASE_ADDRESS;  in kvm_ioapic_reset()
595 	ioapic->ioregsel = 0;  in kvm_ioapic_reset()
596 	ioapic->irr = 0;  in kvm_ioapic_reset()
597 	ioapic->irr_delivered = 0;  in kvm_ioapic_reset()
598 	ioapic->id = 0;  in kvm_ioapic_reset()
599 	memset(ioapic->irq_eoi, 0x00, IOAPIC_NUM_PINS);  in kvm_ioapic_reset()
600 	rtc_irq_eoi_tracking_reset(ioapic);  in kvm_ioapic_reset()
601 	update_handled_vectors(ioapic);  in kvm_ioapic_reset()
611 	struct kvm_ioapic *ioapic;  in kvm_ioapic_init()  local
614 	ioapic = kzalloc(sizeof(struct kvm_ioapic), GFP_KERNEL);  in kvm_ioapic_init()
615 	if (!ioapic)  in kvm_ioapic_init()
617 	spin_lock_init(&ioapic->lock);  in kvm_ioapic_init()
618 	INIT_DELAYED_WORK(&ioapic->eoi_inject, kvm_ioapic_eoi_inject_work);  in kvm_ioapic_init()
619 	kvm->arch.vioapic = ioapic;  in kvm_ioapic_init()
620 	kvm_ioapic_reset(ioapic);  in kvm_ioapic_init()
621 	kvm_iodevice_init(&ioapic->dev, &ioapic_mmio_ops);  in kvm_ioapic_init()
622 	ioapic->kvm = kvm;  in kvm_ioapic_init()
624 	ret = kvm_io_bus_register_dev(kvm, KVM_MMIO_BUS, ioapic->base_address,  in kvm_ioapic_init()
625 				      IOAPIC_MEM_LENGTH, &ioapic->dev);  in kvm_ioapic_init()
629 		kfree(ioapic);  in kvm_ioapic_init()
637 	struct kvm_ioapic *ioapic = kvm->arch.vioapic;  in kvm_ioapic_destroy()  local
639 	cancel_delayed_work_sync(&ioapic->eoi_inject);  in kvm_ioapic_destroy()
640 	if (ioapic) {  in kvm_ioapic_destroy()
641 		kvm_io_bus_unregister_dev(kvm, KVM_MMIO_BUS, &ioapic->dev);  in kvm_ioapic_destroy()
643 		kfree(ioapic);  in kvm_ioapic_destroy()
649 	struct kvm_ioapic *ioapic = ioapic_irqchip(kvm);  in kvm_get_ioapic()  local
650 	if (!ioapic)  in kvm_get_ioapic()
653 	spin_lock(&ioapic->lock);  in kvm_get_ioapic()
654 	memcpy(state, ioapic, sizeof(struct kvm_ioapic_state));  in kvm_get_ioapic()
655 	state->irr &= ~ioapic->irr_delivered;  in kvm_get_ioapic()
656 	spin_unlock(&ioapic->lock);  in kvm_get_ioapic()
662 	struct kvm_ioapic *ioapic = ioapic_irqchip(kvm);  in kvm_set_ioapic()  local
663 	if (!ioapic)  in kvm_set_ioapic()
666 	spin_lock(&ioapic->lock);  in kvm_set_ioapic()
667 	memcpy(ioapic, state, sizeof(struct kvm_ioapic_state));  in kvm_set_ioapic()
668 	ioapic->irr = 0;  in kvm_set_ioapic()
669 	ioapic->irr_delivered = 0;  in kvm_set_ioapic()
670 	update_handled_vectors(ioapic);  in kvm_set_ioapic()
672 	kvm_ioapic_inject_all(ioapic, state->irr);  in kvm_set_ioapic()
673 	spin_unlock(&ioapic->lock);  in kvm_set_ioapic()