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13#include "qemu/osdep.h"
14#include "hw/isa/i8259_internal.h"
15#include "qemu/module.h"
16#include "hw/i386/apic_internal.h"
17#include "sysemu/kvm.h"
18
19#define TYPE_KVM_I8259 "kvm-i8259"
20#define KVM_PIC_CLASS(class) \
21 OBJECT_CLASS_CHECK(KVMPICClass, (class), TYPE_KVM_I8259)
22#define KVM_PIC_GET_CLASS(obj) \
23 OBJECT_GET_CLASS(KVMPICClass, (obj), TYPE_KVM_I8259)
24
25
26
27
28
29typedef struct KVMPICClass {
30 PICCommonClass parent_class;
31
32 DeviceRealize parent_realize;
33} KVMPICClass;
34
35static void kvm_pic_get(PICCommonState *s)
36{
37 struct kvm_irqchip chip;
38 struct kvm_pic_state *kpic;
39 int ret;
40
41 chip.chip_id = s->master ? KVM_IRQCHIP_PIC_MASTER : KVM_IRQCHIP_PIC_SLAVE;
42 ret = kvm_vm_ioctl(kvm_state, KVM_GET_IRQCHIP, &chip);
43 if (ret < 0) {
44 fprintf(stderr, "KVM_GET_IRQCHIP failed: %s\n", strerror(ret));
45 abort();
46 }
47
48 kpic = &chip.chip.pic;
49
50 s->last_irr = kpic->last_irr;
51 s->irr = kpic->irr;
52 s->imr = kpic->imr;
53 s->isr = kpic->isr;
54 s->priority_add = kpic->priority_add;
55 s->irq_base = kpic->irq_base;
56 s->read_reg_select = kpic->read_reg_select;
57 s->poll = kpic->poll;
58 s->special_mask = kpic->special_mask;
59 s->init_state = kpic->init_state;
60 s->auto_eoi = kpic->auto_eoi;
61 s->rotate_on_auto_eoi = kpic->rotate_on_auto_eoi;
62 s->special_fully_nested_mode = kpic->special_fully_nested_mode;
63 s->init4 = kpic->init4;
64 s->elcr = kpic->elcr;
65 s->elcr_mask = kpic->elcr_mask;
66}
67
68static void kvm_pic_put(PICCommonState *s)
69{
70 struct kvm_irqchip chip;
71 struct kvm_pic_state *kpic;
72 int ret;
73
74 chip.chip_id = s->master ? KVM_IRQCHIP_PIC_MASTER : KVM_IRQCHIP_PIC_SLAVE;
75
76 kpic = &chip.chip.pic;
77
78 kpic->last_irr = s->last_irr;
79 kpic->irr = s->irr;
80 kpic->imr = s->imr;
81 kpic->isr = s->isr;
82 kpic->priority_add = s->priority_add;
83 kpic->irq_base = s->irq_base;
84 kpic->read_reg_select = s->read_reg_select;
85 kpic->poll = s->poll;
86 kpic->special_mask = s->special_mask;
87 kpic->init_state = s->init_state;
88 kpic->auto_eoi = s->auto_eoi;
89 kpic->rotate_on_auto_eoi = s->rotate_on_auto_eoi;
90 kpic->special_fully_nested_mode = s->special_fully_nested_mode;
91 kpic->init4 = s->init4;
92 kpic->elcr = s->elcr;
93 kpic->elcr_mask = s->elcr_mask;
94
95 ret = kvm_vm_ioctl(kvm_state, KVM_SET_IRQCHIP, &chip);
96 if (ret < 0) {
97 fprintf(stderr, "KVM_SET_IRQCHIP failed: %s\n", strerror(ret));
98 abort();
99 }
100}
101
102static void kvm_pic_reset(DeviceState *dev)
103{
104 PICCommonState *s = PIC_COMMON(dev);
105
106 s->elcr = 0;
107 pic_reset_common(s);
108
109 kvm_pic_put(s);
110}
111
112static void kvm_pic_set_irq(void *opaque, int irq, int level)
113{
114 int delivered;
115
116 pic_stat_update_irq(irq, level);
117 delivered = kvm_set_irq(kvm_state, irq, level);
118 apic_report_irq_delivered(delivered);
119}
120
121static void kvm_pic_realize(DeviceState *dev, Error **errp)
122{
123 PICCommonState *s = PIC_COMMON(dev);
124 KVMPICClass *kpc = KVM_PIC_GET_CLASS(dev);
125
126 memory_region_init_io(&s->base_io, OBJECT(dev), NULL, NULL, "kvm-pic", 2);
127 memory_region_init_io(&s->elcr_io, OBJECT(dev), NULL, NULL, "kvm-elcr", 1);
128
129 kpc->parent_realize(dev, errp);
130}
131
132qemu_irq *kvm_i8259_init(ISABus *bus)
133{
134 i8259_init_chip(TYPE_KVM_I8259, bus, true);
135 i8259_init_chip(TYPE_KVM_I8259, bus, false);
136
137 return qemu_allocate_irqs(kvm_pic_set_irq, NULL, ISA_NUM_IRQS);
138}
139
140static void kvm_i8259_class_init(ObjectClass *klass, void *data)
141{
142 KVMPICClass *kpc = KVM_PIC_CLASS(klass);
143 PICCommonClass *k = PIC_COMMON_CLASS(klass);
144 DeviceClass *dc = DEVICE_CLASS(klass);
145
146 dc->reset = kvm_pic_reset;
147 device_class_set_parent_realize(dc, kvm_pic_realize, &kpc->parent_realize);
148 k->pre_save = kvm_pic_get;
149 k->post_load = kvm_pic_put;
150}
151
152static const TypeInfo kvm_i8259_info = {
153 .name = TYPE_KVM_I8259,
154 .parent = TYPE_PIC_COMMON,
155 .instance_size = sizeof(PICCommonState),
156 .class_init = kvm_i8259_class_init,
157 .class_size = sizeof(KVMPICClass),
158};
159
160static void kvm_pic_register_types(void)
161{
162 type_register_static(&kvm_i8259_info);
163}
164
165type_init(kvm_pic_register_types)
166
