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a39c1d47 JK |
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 "hw/pc.h" | |
14 | #include "hw/ioapic_internal.h" | |
15 | #include "hw/apic_internal.h" | |
16 | #include "kvm.h" | |
17 | ||
18 | typedef struct KVMIOAPICState KVMIOAPICState; | |
19 | ||
20 | struct KVMIOAPICState { | |
21 | IOAPICCommonState ioapic; | |
22 | uint32_t kvm_gsi_base; | |
23 | }; | |
24 | ||
25 | static void kvm_ioapic_get(IOAPICCommonState *s) | |
26 | { | |
27 | struct kvm_irqchip chip; | |
28 | struct kvm_ioapic_state *kioapic; | |
29 | int ret, i; | |
30 | ||
31 | chip.chip_id = KVM_IRQCHIP_IOAPIC; | |
32 | ret = kvm_vm_ioctl(kvm_state, KVM_GET_IRQCHIP, &chip); | |
33 | if (ret < 0) { | |
34 | fprintf(stderr, "KVM_GET_IRQCHIP failed: %s\n", strerror(ret)); | |
35 | abort(); | |
36 | } | |
37 | ||
38 | kioapic = &chip.chip.ioapic; | |
39 | ||
40 | s->id = kioapic->id; | |
41 | s->ioregsel = kioapic->ioregsel; | |
42 | s->irr = kioapic->irr; | |
43 | for (i = 0; i < IOAPIC_NUM_PINS; i++) { | |
44 | s->ioredtbl[i] = kioapic->redirtbl[i].bits; | |
45 | } | |
46 | } | |
47 | ||
48 | static void kvm_ioapic_put(IOAPICCommonState *s) | |
49 | { | |
50 | struct kvm_irqchip chip; | |
51 | struct kvm_ioapic_state *kioapic; | |
52 | int ret, i; | |
53 | ||
54 | chip.chip_id = KVM_IRQCHIP_IOAPIC; | |
55 | kioapic = &chip.chip.ioapic; | |
56 | ||
57 | kioapic->id = s->id; | |
58 | kioapic->ioregsel = s->ioregsel; | |
59 | kioapic->base_address = s->busdev.mmio[0].addr; | |
60 | kioapic->irr = s->irr; | |
61 | for (i = 0; i < IOAPIC_NUM_PINS; i++) { | |
62 | kioapic->redirtbl[i].bits = s->ioredtbl[i]; | |
63 | } | |
64 | ||
65 | ret = kvm_vm_ioctl(kvm_state, KVM_SET_IRQCHIP, &chip); | |
66 | if (ret < 0) { | |
67 | fprintf(stderr, "KVM_GET_IRQCHIP failed: %s\n", strerror(ret)); | |
68 | abort(); | |
69 | } | |
70 | } | |
71 | ||
72 | static void kvm_ioapic_reset(DeviceState *dev) | |
73 | { | |
74 | IOAPICCommonState *s = DO_UPCAST(IOAPICCommonState, busdev.qdev, dev); | |
75 | ||
76 | ioapic_reset_common(dev); | |
77 | kvm_ioapic_put(s); | |
78 | } | |
79 | ||
80 | static void kvm_ioapic_set_irq(void *opaque, int irq, int level) | |
81 | { | |
82 | KVMIOAPICState *s = opaque; | |
83 | int delivered; | |
84 | ||
85 | delivered = kvm_irqchip_set_irq(kvm_state, s->kvm_gsi_base + irq, level); | |
86 | apic_report_irq_delivered(delivered); | |
87 | } | |
88 | ||
89 | static void kvm_ioapic_init(IOAPICCommonState *s, int instance_no) | |
90 | { | |
91 | memory_region_init_reservation(&s->io_memory, "kvm-ioapic", 0x1000); | |
92 | ||
93 | qdev_init_gpio_in(&s->busdev.qdev, kvm_ioapic_set_irq, IOAPIC_NUM_PINS); | |
94 | } | |
95 | ||
39bffca2 AL |
96 | static Property kvm_ioapic_properties[] = { |
97 | DEFINE_PROP_UINT32("gsi_base", KVMIOAPICState, kvm_gsi_base, 0), | |
98 | DEFINE_PROP_END_OF_LIST() | |
99 | }; | |
100 | ||
999e12bb AL |
101 | static void kvm_ioapic_class_init(ObjectClass *klass, void *data) |
102 | { | |
103 | IOAPICCommonClass *k = IOAPIC_COMMON_CLASS(klass); | |
39bffca2 | 104 | DeviceClass *dc = DEVICE_CLASS(klass); |
999e12bb AL |
105 | |
106 | k->init = kvm_ioapic_init; | |
107 | k->pre_save = kvm_ioapic_get; | |
108 | k->post_load = kvm_ioapic_put; | |
39bffca2 AL |
109 | dc->reset = kvm_ioapic_reset; |
110 | dc->props = kvm_ioapic_properties; | |
999e12bb AL |
111 | } |
112 | ||
39bffca2 | 113 | static TypeInfo kvm_ioapic_info = { |
999e12bb | 114 | .name = "kvm-ioapic", |
39bffca2 AL |
115 | .parent = TYPE_IOAPIC_COMMON, |
116 | .instance_size = sizeof(KVMIOAPICState), | |
999e12bb | 117 | .class_init = kvm_ioapic_class_init, |
a39c1d47 JK |
118 | }; |
119 | ||
120 | static void kvm_ioapic_register_device(void) | |
121 | { | |
39bffca2 | 122 | type_register_static(&kvm_ioapic_info); |
a39c1d47 JK |
123 | } |
124 | ||
125 | device_init(kvm_ioapic_register_device) |