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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 "hw/irq.h"
18#include "sysemu/kvm.h"
19
20#define TYPE_KVM_I8259 "kvm-i8259"
21#define KVM_PIC_CLASS(class) \
22 OBJECT_CLASS_CHECK(KVMPICClass, (class), TYPE_KVM_I8259)
23#define KVM_PIC_GET_CLASS(obj) \
24 OBJECT_GET_CLASS(KVMPICClass, (obj), TYPE_KVM_I8259)
25
26
27
28
29
30typedef struct KVMPICClass {
31 PICCommonClass parent_class;
32
33 DeviceRealize parent_realize;
34} KVMPICClass;
35
36static void kvm_pic_get(PICCommonState *s)
37{
38 struct kvm_irqchip chip;
39 struct kvm_pic_state *kpic;
40 int ret;
41
42 chip.chip_id = s->master ? KVM_IRQCHIP_PIC_MASTER : KVM_IRQCHIP_PIC_SLAVE;
43 ret = kvm_vm_ioctl(kvm_state, KVM_GET_IRQCHIP, &chip);
44 if (ret < 0) {
45 fprintf(stderr, "KVM_GET_IRQCHIP failed: %s\n", strerror(ret));
46 abort();
47 }
48
49 kpic = &chip.chip.pic;
50
51 s->last_irr = kpic->last_irr;
52 s->irr = kpic->irr;
53 s->imr = kpic->imr;
54 s->isr = kpic->isr;
55 s->priority_add = kpic->priority_add;
56 s->irq_base = kpic->irq_base;
57 s->read_reg_select = kpic->read_reg_select;
58 s->poll = kpic->poll;
59 s->special_mask = kpic->special_mask;
60 s->init_state = kpic->init_state;
61 s->auto_eoi = kpic->auto_eoi;
62 s->rotate_on_auto_eoi = kpic->rotate_on_auto_eoi;
63 s->special_fully_nested_mode = kpic->special_fully_nested_mode;
64 s->init4 = kpic->init4;
65 s->elcr = kpic->elcr;
66 s->elcr_mask = kpic->elcr_mask;
67}
68
69static void kvm_pic_put(PICCommonState *s)
70{
71 struct kvm_irqchip chip;
72 struct kvm_pic_state *kpic;
73 int ret;
74
75 chip.chip_id = s->master ? KVM_IRQCHIP_PIC_MASTER : KVM_IRQCHIP_PIC_SLAVE;
76
77 kpic = &chip.chip.pic;
78
79 kpic->last_irr = s->last_irr;
80 kpic->irr = s->irr;
81 kpic->imr = s->imr;
82 kpic->isr = s->isr;
83 kpic->priority_add = s->priority_add;
84 kpic->irq_base = s->irq_base;
85 kpic->read_reg_select = s->read_reg_select;
86 kpic->poll = s->poll;
87 kpic->special_mask = s->special_mask;
88 kpic->init_state = s->init_state;
89 kpic->auto_eoi = s->auto_eoi;
90 kpic->rotate_on_auto_eoi = s->rotate_on_auto_eoi;
91 kpic->special_fully_nested_mode = s->special_fully_nested_mode;
92 kpic->init4 = s->init4;
93 kpic->elcr = s->elcr;
94 kpic->elcr_mask = s->elcr_mask;
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
103static void kvm_pic_reset(DeviceState *dev)
104{
105 PICCommonState *s = PIC_COMMON(dev);
106
107 s->elcr = 0;
108 pic_reset_common(s);
109
110 kvm_pic_put(s);
111}
112
113static void kvm_pic_set_irq(void *opaque, int irq, int level)
114{
115 int delivered;
116
117 pic_stat_update_irq(irq, level);
118 delivered = kvm_set_irq(kvm_state, irq, level);
119 apic_report_irq_delivered(delivered);
120}
121
122static void kvm_pic_realize(DeviceState *dev, Error **errp)
123{
124 PICCommonState *s = PIC_COMMON(dev);
125 KVMPICClass *kpc = KVM_PIC_GET_CLASS(dev);
126
127 memory_region_init_io(&s->base_io, OBJECT(dev), NULL, NULL, "kvm-pic", 2);
128 memory_region_init_io(&s->elcr_io, OBJECT(dev), NULL, NULL, "kvm-elcr", 1);
129
130 kpc->parent_realize(dev, errp);
131}
132
133qemu_irq *kvm_i8259_init(ISABus *bus)
134{
135 i8259_init_chip(TYPE_KVM_I8259, bus, true);
136 i8259_init_chip(TYPE_KVM_I8259, bus, false);
137
138 return qemu_allocate_irqs(kvm_pic_set_irq, NULL, ISA_NUM_IRQS);
139}
140
141static void kvm_i8259_class_init(ObjectClass *klass, void *data)
142{
143 KVMPICClass *kpc = KVM_PIC_CLASS(klass);
144 PICCommonClass *k = PIC_COMMON_CLASS(klass);
145 DeviceClass *dc = DEVICE_CLASS(klass);
146
147 dc->reset = kvm_pic_reset;
148 device_class_set_parent_realize(dc, kvm_pic_realize, &kpc->parent_realize);
149 k->pre_save = kvm_pic_get;
150 k->post_load = kvm_pic_put;
151}
152
153static const TypeInfo kvm_i8259_info = {
154 .name = TYPE_KVM_I8259,
155 .parent = TYPE_PIC_COMMON,
156 .instance_size = sizeof(PICCommonState),
157 .class_init = kvm_i8259_class_init,
158 .class_size = sizeof(KVMPICClass),
159};
160
161static void kvm_pic_register_types(void)
162{
163 type_register_static(&kvm_i8259_info);
164}
165
166type_init(kvm_pic_register_types)
167
