Add access control support to qemu bridge helper
[qemu.git] / hw / kvm / i8259.c
1 /*
2 * KVM in-kernel PIC (i8259) 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 #include "hw/i8259_internal.h"
13 #include "hw/apic_internal.h"
14 #include "kvm.h"
15
16 static void kvm_pic_get(PICCommonState *s)
17 {
18 struct kvm_irqchip chip;
19 struct kvm_pic_state *kpic;
20 int ret;
21
22 chip.chip_id = s->master ? KVM_IRQCHIP_PIC_MASTER : KVM_IRQCHIP_PIC_SLAVE;
23 ret = kvm_vm_ioctl(kvm_state, KVM_GET_IRQCHIP, &chip);
24 if (ret < 0) {
25 fprintf(stderr, "KVM_GET_IRQCHIP failed: %s\n", strerror(ret));
26 abort();
27 }
28
29 kpic = &chip.chip.pic;
30
31 s->last_irr = kpic->last_irr;
32 s->irr = kpic->irr;
33 s->imr = kpic->imr;
34 s->isr = kpic->isr;
35 s->priority_add = kpic->priority_add;
36 s->irq_base = kpic->irq_base;
37 s->read_reg_select = kpic->read_reg_select;
38 s->poll = kpic->poll;
39 s->special_mask = kpic->special_mask;
40 s->init_state = kpic->init_state;
41 s->auto_eoi = kpic->auto_eoi;
42 s->rotate_on_auto_eoi = kpic->rotate_on_auto_eoi;
43 s->special_fully_nested_mode = kpic->special_fully_nested_mode;
44 s->init4 = kpic->init4;
45 s->elcr = kpic->elcr;
46 s->elcr_mask = kpic->elcr_mask;
47 }
48
49 static void kvm_pic_put(PICCommonState *s)
50 {
51 struct kvm_irqchip chip;
52 struct kvm_pic_state *kpic;
53 int ret;
54
55 chip.chip_id = s->master ? KVM_IRQCHIP_PIC_MASTER : KVM_IRQCHIP_PIC_SLAVE;
56
57 kpic = &chip.chip.pic;
58
59 kpic->last_irr = s->last_irr;
60 kpic->irr = s->irr;
61 kpic->imr = s->imr;
62 kpic->isr = s->isr;
63 kpic->priority_add = s->priority_add;
64 kpic->irq_base = s->irq_base;
65 kpic->read_reg_select = s->read_reg_select;
66 kpic->poll = s->poll;
67 kpic->special_mask = s->special_mask;
68 kpic->init_state = s->init_state;
69 kpic->auto_eoi = s->auto_eoi;
70 kpic->rotate_on_auto_eoi = s->rotate_on_auto_eoi;
71 kpic->special_fully_nested_mode = s->special_fully_nested_mode;
72 kpic->init4 = s->init4;
73 kpic->elcr = s->elcr;
74 kpic->elcr_mask = s->elcr_mask;
75
76 ret = kvm_vm_ioctl(kvm_state, KVM_SET_IRQCHIP, &chip);
77 if (ret < 0) {
78 fprintf(stderr, "KVM_GET_IRQCHIP failed: %s\n", strerror(ret));
79 abort();
80 }
81 }
82
83 static void kvm_pic_reset(DeviceState *dev)
84 {
85 PICCommonState *s = DO_UPCAST(PICCommonState, dev.qdev, dev);
86
87 pic_reset_common(s);
88 s->elcr = 0;
89
90 kvm_pic_put(s);
91 }
92
93 static void kvm_pic_set_irq(void *opaque, int irq, int level)
94 {
95 int delivered;
96
97 delivered = kvm_irqchip_set_irq(kvm_state, irq, level);
98 apic_report_irq_delivered(delivered);
99 }
100
101 static void kvm_pic_init(PICCommonState *s)
102 {
103 memory_region_init_reservation(&s->base_io, "kvm-pic", 2);
104 memory_region_init_reservation(&s->elcr_io, "kvm-elcr", 1);
105 }
106
107 qemu_irq *kvm_i8259_init(ISABus *bus)
108 {
109 i8259_init_chip("kvm-i8259", bus, true);
110 i8259_init_chip("kvm-i8259", bus, false);
111
112 return qemu_allocate_irqs(kvm_pic_set_irq, NULL, ISA_NUM_IRQS);
113 }
114
115 static void kvm_i8259_class_init(ObjectClass *klass, void *data)
116 {
117 PICCommonClass *k = PIC_COMMON_CLASS(klass);
118
119 k->init = kvm_pic_init;
120 k->pre_save = kvm_pic_get;
121 k->post_load = kvm_pic_put;
122 }
123
124 static DeviceInfo kvm_i8259_info = {
125 .name = "kvm-i8259",
126 .reset = kvm_pic_reset,
127 .class_init = kvm_i8259_class_init,
128 };
129
130 static void kvm_pic_register(void)
131 {
132 pic_qdev_register(&kvm_i8259_info);
133 }
134
135 device_init(kvm_pic_register)