lapic.c (03e075b38e6cd25267c8d6e2797fa4537ca3348d) lapic.c (520040146a0af36f7875ec06b58f44b19a0edf53)
1
2/*
3 * Local APIC virtualization
4 *
5 * Copyright (C) 2006 Qumranet, Inc.
6 * Copyright (C) 2007 Novell
7 * Copyright (C) 2007 Intel
8 * Copyright 2009 Red Hat, Inc. and/or its affiliates.

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670 return target != source;
671 default:
672 apic_debug("kvm: apic: Bad dest shorthand value %x\n",
673 short_hand);
674 return false;
675 }
676}
677
1
2/*
3 * Local APIC virtualization
4 *
5 * Copyright (C) 2006 Qumranet, Inc.
6 * Copyright (C) 2007 Novell
7 * Copyright (C) 2007 Intel
8 * Copyright 2009 Red Hat, Inc. and/or its affiliates.

--- 661 unchanged lines hidden (view full) ---

670 return target != source;
671 default:
672 apic_debug("kvm: apic: Bad dest shorthand value %x\n",
673 short_hand);
674 return false;
675 }
676}
677
678int kvm_vector_to_index(u32 vector, u32 dest_vcpus,
679 const unsigned long *bitmap, u32 bitmap_size)
680{
681 u32 mod;
682 int i, idx = -1;
683
684 mod = vector % dest_vcpus;
685
686 for (i = 0; i <= mod; i++) {
687 idx = find_next_bit(bitmap, bitmap_size, idx + 1);
688 BUG_ON(idx == bitmap_size);
689 }
690
691 return idx;
692}
693
678bool kvm_irq_delivery_to_apic_fast(struct kvm *kvm, struct kvm_lapic *src,
679 struct kvm_lapic_irq *irq, int *r, unsigned long *dest_map)
680{
681 struct kvm_apic_map *map;
682 unsigned long bitmap = 1;
683 struct kvm_lapic **dst;
684 int i;
685 bool ret, x2apic_ipi;

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722
723 apic_logical_id(map, irq->dest_id, &cid, (u16 *)&bitmap);
724
725 if (cid >= ARRAY_SIZE(map->logical_map))
726 goto out;
727
728 dst = map->logical_map[cid];
729
694bool kvm_irq_delivery_to_apic_fast(struct kvm *kvm, struct kvm_lapic *src,
695 struct kvm_lapic_irq *irq, int *r, unsigned long *dest_map)
696{
697 struct kvm_apic_map *map;
698 unsigned long bitmap = 1;
699 struct kvm_lapic **dst;
700 int i;
701 bool ret, x2apic_ipi;

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738
739 apic_logical_id(map, irq->dest_id, &cid, (u16 *)&bitmap);
740
741 if (cid >= ARRAY_SIZE(map->logical_map))
742 goto out;
743
744 dst = map->logical_map[cid];
745
730 if (kvm_lowest_prio_delivery(irq)) {
746 if (!kvm_lowest_prio_delivery(irq))
747 goto set_irq;
748
749 if (!kvm_vector_hashing_enabled()) {
731 int l = -1;
732 for_each_set_bit(i, &bitmap, 16) {
733 if (!dst[i])
734 continue;
735 if (l < 0)
736 l = i;
750 int l = -1;
751 for_each_set_bit(i, &bitmap, 16) {
752 if (!dst[i])
753 continue;
754 if (l < 0)
755 l = i;
737 else if (kvm_apic_compare_prio(dst[i]->vcpu, dst[l]->vcpu) < 0)
756 else if (kvm_apic_compare_prio(dst[i]->vcpu,
757 dst[l]->vcpu) < 0)
738 l = i;
739 }
758 l = i;
759 }
740
741 bitmap = (l >= 0) ? 1 << l : 0;
760 bitmap = (l >= 0) ? 1 << l : 0;
761 } else {
762 int idx;
763 unsigned int dest_vcpus;
764
765 dest_vcpus = hweight16(bitmap);
766 if (dest_vcpus == 0)
767 goto out;
768
769 idx = kvm_vector_to_index(irq->vector,
770 dest_vcpus, &bitmap, 16);
771
772 /*
773 * We may find a hardware disabled LAPIC here, if that
774 * is the case, print out a error message once for each
775 * guest and return.
776 */
777 if (!dst[idx] && !kvm->arch.disabled_lapic_found) {
778 kvm->arch.disabled_lapic_found = true;
779 printk(KERN_INFO
780 "Disabled LAPIC found during irq injection\n");
781 goto out;
782 }
783
784 bitmap = (idx >= 0) ? 1 << idx : 0;
742 }
743 }
744
785 }
786 }
787
788set_irq:
745 for_each_set_bit(i, &bitmap, 16) {
746 if (!dst[i])
747 continue;
748 if (*r < 0)
749 *r = 0;
750 *r += kvm_apic_set_irq(dst[i]->vcpu, irq, dest_map);
751 }
752out:

--- 1443 unchanged lines hidden --- 		789 for_each_set_bit(i, &bitmap, 16) {
790 if (!dst[i])
791 continue;
792 if (*r < 0)
793 *r = 0;
794 *r += kvm_apic_set_irq(dst[i]->vcpu, irq, dest_map);
795 }
796out:

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