aboutsummaryrefslogtreecommitdiffstats
path: root/virt/kvm/irq_comm.c
diff options
context:
space:
mode:
Diffstat (limited to 'virt/kvm/irq_comm.c')
-rw-r--r--virt/kvm/irq_comm.c95
1 files changed, 58 insertions, 37 deletions
diff --git a/virt/kvm/irq_comm.c b/virt/kvm/irq_comm.c
index 864ac5483baa..aec7a0d93a3f 100644
--- a/virt/kvm/irq_comm.c
+++ b/virt/kvm/irq_comm.c
@@ -43,53 +43,74 @@ static int kvm_set_ioapic_irq(struct kvm_kernel_irq_routing_entry *e,
43 return kvm_ioapic_set_irq(kvm->arch.vioapic, e->irqchip.pin, level); 43 return kvm_ioapic_set_irq(kvm->arch.vioapic, e->irqchip.pin, level);
44} 44}
45 45
46void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
47 union kvm_ioapic_redirect_entry *entry,
48 unsigned long *deliver_bitmask)
49{
50 struct kvm_vcpu *vcpu;
51
52 *deliver_bitmask = kvm_ioapic_get_delivery_bitmask(ioapic,
53 entry->fields.dest_id, entry->fields.dest_mode);
54 switch (entry->fields.delivery_mode) {
55 case IOAPIC_LOWEST_PRIORITY:
56 vcpu = kvm_get_lowest_prio_vcpu(ioapic->kvm,
57 entry->fields.vector, *deliver_bitmask);
58 *deliver_bitmask = 1 << vcpu->vcpu_id;
59 break;
60 case IOAPIC_FIXED:
61 case IOAPIC_NMI:
62 break;
63 default:
64 if (printk_ratelimit())
65 printk(KERN_INFO "kvm: unsupported delivery mode %d\n",
66 entry->fields.delivery_mode);
67 *deliver_bitmask = 0;
68 }
69}
70
46static int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e, 71static int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e,
47 struct kvm *kvm, int level) 72 struct kvm *kvm, int level)
48{ 73{
49 int vcpu_id, r = -1; 74 int vcpu_id, r = -1;
50 struct kvm_vcpu *vcpu; 75 struct kvm_vcpu *vcpu;
51 struct kvm_ioapic *ioapic = ioapic_irqchip(kvm); 76 struct kvm_ioapic *ioapic = ioapic_irqchip(kvm);
52 int dest_id = (e->msi.address_lo & MSI_ADDR_DEST_ID_MASK) 77 union kvm_ioapic_redirect_entry entry;
53 >> MSI_ADDR_DEST_ID_SHIFT; 78 unsigned long deliver_bitmask;
54 int vector = (e->msi.data & MSI_DATA_VECTOR_MASK)
55 >> MSI_DATA_VECTOR_SHIFT;
56 int dest_mode = test_bit(MSI_ADDR_DEST_MODE_SHIFT,
57 (unsigned long *)&e->msi.address_lo);
58 int trig_mode = test_bit(MSI_DATA_TRIGGER_SHIFT,
59 (unsigned long *)&e->msi.data);
60 int delivery_mode = test_bit(MSI_DATA_DELIVERY_MODE_SHIFT,
61 (unsigned long *)&e->msi.data);
62 u32 deliver_bitmask;
63 79
64 BUG_ON(!ioapic); 80 BUG_ON(!ioapic);
65 81
66 deliver_bitmask = kvm_ioapic_get_delivery_bitmask(ioapic, 82 entry.bits = 0;
67 dest_id, dest_mode); 83 entry.fields.dest_id = (e->msi.address_lo &
68 /* IOAPIC delivery mode value is the same as MSI here */ 84 MSI_ADDR_DEST_ID_MASK) >> MSI_ADDR_DEST_ID_SHIFT;
69 switch (delivery_mode) { 85 entry.fields.vector = (e->msi.data &
70 case IOAPIC_LOWEST_PRIORITY: 86 MSI_DATA_VECTOR_MASK) >> MSI_DATA_VECTOR_SHIFT;
71 vcpu = kvm_get_lowest_prio_vcpu(ioapic->kvm, vector, 87 entry.fields.dest_mode = test_bit(MSI_ADDR_DEST_MODE_SHIFT,
72 deliver_bitmask); 88 (unsigned long *)&e->msi.address_lo);
73 if (vcpu != NULL) 89 entry.fields.trig_mode = test_bit(MSI_DATA_TRIGGER_SHIFT,
74 r = kvm_apic_set_irq(vcpu, vector, trig_mode); 90 (unsigned long *)&e->msi.data);
75 else 91 entry.fields.delivery_mode = test_bit(
76 printk(KERN_INFO "kvm: null lowest priority vcpu!\n"); 92 MSI_DATA_DELIVERY_MODE_SHIFT,
77 break; 93 (unsigned long *)&e->msi.data);
78 case IOAPIC_FIXED: 94
79 for (vcpu_id = 0; deliver_bitmask != 0; vcpu_id++) { 95 /* TODO Deal with RH bit of MSI message address */
80 if (!(deliver_bitmask & (1 << vcpu_id))) 96
81 continue; 97 kvm_get_intr_delivery_bitmask(ioapic, &entry, &deliver_bitmask);
82 deliver_bitmask &= ~(1 << vcpu_id); 98
83 vcpu = ioapic->kvm->vcpus[vcpu_id]; 99 if (!deliver_bitmask) {
84 if (vcpu) { 100 printk(KERN_WARNING "kvm: no destination for MSI delivery!");
85 if (r < 0) 101 return -1;
86 r = 0; 102 }
87 r += kvm_apic_set_irq(vcpu, vector, trig_mode); 103 for (vcpu_id = 0; deliver_bitmask != 0; vcpu_id++) {
88 } 104 if (!(deliver_bitmask & (1 << vcpu_id)))
105 continue;
106 deliver_bitmask &= ~(1 << vcpu_id);
107 vcpu = ioapic->kvm->vcpus[vcpu_id];
108 if (vcpu) {
109 if (r < 0)
110 r = 0;
111 r += kvm_apic_set_irq(vcpu, entry.fields.vector,
112 entry.fields.trig_mode);
89 } 113 }
90 break;
91 default:
92 break;
93 } 114 }
94 return r; 115 return r;
95} 116}