1 /*
2 * KVM in-kernel IOPIC support
3 *
4 * Copyright (c) 2011 Siemens AG
5 *
6 * Authors:
7 * Jan Kiszka <jan.kiszka@siemens.com>
8 *
9 * This work is licensed under the terms of the GNU GPL version 2.
10 * See the COPYING file in the top-level directory.
11 */
12
13 #include "qemu/osdep.h"
14 #include "monitor/monitor.h"
15 #include "hw/qdev-properties.h"
16 #include "hw/intc/ioapic_internal.h"
17 #include "hw/intc/kvm_irqcount.h"
18 #include "sysemu/kvm.h"
19 #include "kvm/kvm_i386.h"
20
21 /* PC Utility function */
kvm_pc_setup_irq_routing(bool pci_enabled)22 void kvm_pc_setup_irq_routing(bool pci_enabled)
23 {
24 KVMState *s = kvm_state;
25 int i;
26
27 assert(kvm_has_gsi_routing());
28 for (i = 0; i < 8; ++i) {
29 if (i == 2) {
30 continue;
31 }
32 kvm_irqchip_add_irq_route(s, i, KVM_IRQCHIP_PIC_MASTER, i);
33 }
34 for (i = 8; i < 16; ++i) {
35 kvm_irqchip_add_irq_route(s, i, KVM_IRQCHIP_PIC_SLAVE, i - 8);
36 }
37 if (pci_enabled) {
38 for (i = 0; i < KVM_IOAPIC_NUM_PINS; ++i) {
39 if (i == 0) {
40 kvm_irqchip_add_irq_route(s, i, KVM_IRQCHIP_IOAPIC, 2);
41 } else if (i != 2) {
42 kvm_irqchip_add_irq_route(s, i, KVM_IRQCHIP_IOAPIC, i);
43 }
44 }
45 }
46 kvm_irqchip_commit_routes(s);
47 }
48
49 typedef struct KVMIOAPICState KVMIOAPICState;
50
51 struct KVMIOAPICState {
52 IOAPICCommonState ioapic;
53 uint32_t kvm_gsi_base;
54 };
55
kvm_ioapic_get(IOAPICCommonState * s)56 static void kvm_ioapic_get(IOAPICCommonState *s)
57 {
58 struct kvm_irqchip chip;
59 struct kvm_ioapic_state *kioapic;
60 int ret, i;
61
62 chip.chip_id = KVM_IRQCHIP_IOAPIC;
63 ret = kvm_vm_ioctl(kvm_state, KVM_GET_IRQCHIP, &chip);
64 if (ret < 0) {
65 fprintf(stderr, "KVM_GET_IRQCHIP failed: %s\n", strerror(-ret));
66 abort();
67 }
68
69 kioapic = &chip.chip.ioapic;
70
71 s->id = kioapic->id;
72 s->ioregsel = kioapic->ioregsel;
73 s->irr = kioapic->irr;
74 for (i = 0; i < IOAPIC_NUM_PINS; i++) {
75 s->ioredtbl[i] = kioapic->redirtbl[i].bits;
76 }
77 }
78
kvm_ioapic_put(IOAPICCommonState * s)79 static void kvm_ioapic_put(IOAPICCommonState *s)
80 {
81 struct kvm_irqchip chip;
82 struct kvm_ioapic_state *kioapic;
83 int ret, i;
84
85 chip.chip_id = KVM_IRQCHIP_IOAPIC;
86 kioapic = &chip.chip.ioapic;
87
88 kioapic->id = s->id;
89 kioapic->ioregsel = s->ioregsel;
90 kioapic->base_address = s->busdev.mmio[0].addr;
91 kioapic->irr = s->irr;
92 for (i = 0; i < IOAPIC_NUM_PINS; i++) {
93 kioapic->redirtbl[i].bits = s->ioredtbl[i];
94 }
95
96 ret = kvm_vm_ioctl(kvm_state, KVM_SET_IRQCHIP, &chip);
97 if (ret < 0) {
98 fprintf(stderr, "KVM_SET_IRQCHIP failed: %s\n", strerror(-ret));
99 abort();
100 }
101 }
102
kvm_ioapic_reset(DeviceState * dev)103 static void kvm_ioapic_reset(DeviceState *dev)
104 {
105 IOAPICCommonState *s = IOAPIC_COMMON(dev);
106
107 ioapic_reset_common(dev);
108 kvm_ioapic_put(s);
109 }
110
kvm_ioapic_set_irq(void * opaque,int irq,int level)111 static void kvm_ioapic_set_irq(void *opaque, int irq, int level)
112 {
113 KVMIOAPICState *s = opaque;
114 IOAPICCommonState *common = IOAPIC_COMMON(s);
115 int delivered;
116
117 ioapic_stat_update_irq(common, irq, level);
118 delivered = kvm_set_irq(kvm_state, s->kvm_gsi_base + irq, level);
119 kvm_report_irq_delivered(delivered);
120 }
121
kvm_ioapic_realize(DeviceState * dev,Error ** errp)122 static void kvm_ioapic_realize(DeviceState *dev, Error **errp)
123 {
124 IOAPICCommonState *s = IOAPIC_COMMON(dev);
125
126 memory_region_init_io(&s->io_memory, OBJECT(dev), NULL, NULL, "kvm-ioapic", 0x1000);
127 /*
128 * KVM ioapic only supports 0x11 now. This will only be used when
129 * we want to dump ioapic version.
130 */
131 s->version = 0x11;
132
133 qdev_init_gpio_in(dev, kvm_ioapic_set_irq, IOAPIC_NUM_PINS);
134 }
135
136 static Property kvm_ioapic_properties[] = {
137 DEFINE_PROP_UINT32("gsi_base", KVMIOAPICState, kvm_gsi_base, 0),
138 DEFINE_PROP_END_OF_LIST()
139 };
140
kvm_ioapic_class_init(ObjectClass * klass,void * data)141 static void kvm_ioapic_class_init(ObjectClass *klass, void *data)
142 {
143 IOAPICCommonClass *k = IOAPIC_COMMON_CLASS(klass);
144 DeviceClass *dc = DEVICE_CLASS(klass);
145
146 k->realize = kvm_ioapic_realize;
147 k->pre_save = kvm_ioapic_get;
148 k->post_load = kvm_ioapic_put;
149 device_class_set_legacy_reset(dc, kvm_ioapic_reset);
150 device_class_set_props(dc, kvm_ioapic_properties);
151 }
152
153 static const TypeInfo kvm_ioapic_info = {
154 .name = TYPE_KVM_IOAPIC,
155 .parent = TYPE_IOAPIC_COMMON,
156 .instance_size = sizeof(KVMIOAPICState),
157 .class_init = kvm_ioapic_class_init,
158 };
159
kvm_ioapic_register_types(void)160 static void kvm_ioapic_register_types(void)
161 {
162 type_register_static(&kvm_ioapic_info);
163 }
164
165 type_init(kvm_ioapic_register_types)
166