monitor/qmp: Update comment for commit 4eaca8de268
[qemu/armbru.git] / hw / i386 / kvm / ioapic.c
blobf94729c56553e68e30c609914a123d6bf133c7fd
1 /*
2 * KVM in-kernel IOPIC support
4 * Copyright (c) 2011 Siemens AG
6 * Authors:
7 * Jan Kiszka <jan.kiszka@siemens.com>
9 * This work is licensed under the terms of the GNU GPL version 2.
10 * See the COPYING file in the top-level directory.
13 #include "qemu/osdep.h"
14 #include "monitor/monitor.h"
15 #include "hw/i386/pc.h"
16 #include "hw/irq.h"
17 #include "hw/qdev-properties.h"
18 #include "hw/i386/ioapic_internal.h"
19 #include "hw/i386/apic_internal.h"
20 #include "sysemu/kvm.h"
22 /* PC Utility function */
23 void kvm_pc_setup_irq_routing(bool pci_enabled)
25 KVMState *s = kvm_state;
26 int i;
28 if (kvm_check_extension(s, KVM_CAP_IRQ_ROUTING)) {
29 for (i = 0; i < 8; ++i) {
30 if (i == 2) {
31 continue;
33 kvm_irqchip_add_irq_route(s, i, KVM_IRQCHIP_PIC_MASTER, i);
35 for (i = 8; i < 16; ++i) {
36 kvm_irqchip_add_irq_route(s, i, KVM_IRQCHIP_PIC_SLAVE, i - 8);
38 if (pci_enabled) {
39 for (i = 0; i < 24; ++i) {
40 if (i == 0) {
41 kvm_irqchip_add_irq_route(s, i, KVM_IRQCHIP_IOAPIC, 2);
42 } else if (i != 2) {
43 kvm_irqchip_add_irq_route(s, i, KVM_IRQCHIP_IOAPIC, i);
47 kvm_irqchip_commit_routes(s);
51 void kvm_pc_gsi_handler(void *opaque, int n, int level)
53 GSIState *s = opaque;
55 if (n < ISA_NUM_IRQS) {
56 /* Kernel will forward to both PIC and IOAPIC */
57 qemu_set_irq(s->i8259_irq[n], level);
58 } else {
59 qemu_set_irq(s->ioapic_irq[n], level);
63 typedef struct KVMIOAPICState KVMIOAPICState;
65 struct KVMIOAPICState {
66 IOAPICCommonState ioapic;
67 uint32_t kvm_gsi_base;
70 static void kvm_ioapic_get(IOAPICCommonState *s)
72 struct kvm_irqchip chip;
73 struct kvm_ioapic_state *kioapic;
74 int ret, i;
76 chip.chip_id = KVM_IRQCHIP_IOAPIC;
77 ret = kvm_vm_ioctl(kvm_state, KVM_GET_IRQCHIP, &chip);
78 if (ret < 0) {
79 fprintf(stderr, "KVM_GET_IRQCHIP failed: %s\n", strerror(ret));
80 abort();
83 kioapic = &chip.chip.ioapic;
85 s->id = kioapic->id;
86 s->ioregsel = kioapic->ioregsel;
87 s->irr = kioapic->irr;
88 for (i = 0; i < IOAPIC_NUM_PINS; i++) {
89 s->ioredtbl[i] = kioapic->redirtbl[i].bits;
93 static void kvm_ioapic_put(IOAPICCommonState *s)
95 struct kvm_irqchip chip;
96 struct kvm_ioapic_state *kioapic;
97 int ret, i;
99 chip.chip_id = KVM_IRQCHIP_IOAPIC;
100 kioapic = &chip.chip.ioapic;
102 kioapic->id = s->id;
103 kioapic->ioregsel = s->ioregsel;
104 kioapic->base_address = s->busdev.mmio[0].addr;
105 kioapic->irr = s->irr;
106 for (i = 0; i < IOAPIC_NUM_PINS; i++) {
107 kioapic->redirtbl[i].bits = s->ioredtbl[i];
110 ret = kvm_vm_ioctl(kvm_state, KVM_SET_IRQCHIP, &chip);
111 if (ret < 0) {
112 fprintf(stderr, "KVM_GET_IRQCHIP failed: %s\n", strerror(ret));
113 abort();
117 static void kvm_ioapic_reset(DeviceState *dev)
119 IOAPICCommonState *s = IOAPIC_COMMON(dev);
121 ioapic_reset_common(dev);
122 kvm_ioapic_put(s);
125 static void kvm_ioapic_set_irq(void *opaque, int irq, int level)
127 KVMIOAPICState *s = opaque;
128 IOAPICCommonState *common = IOAPIC_COMMON(s);
129 int delivered;
131 ioapic_stat_update_irq(common, irq, level);
132 delivered = kvm_set_irq(kvm_state, s->kvm_gsi_base + irq, level);
133 apic_report_irq_delivered(delivered);
136 static void kvm_ioapic_realize(DeviceState *dev, Error **errp)
138 IOAPICCommonState *s = IOAPIC_COMMON(dev);
140 memory_region_init_io(&s->io_memory, OBJECT(dev), NULL, NULL, "kvm-ioapic", 0x1000);
142 * KVM ioapic only supports 0x11 now. This will only be used when
143 * we want to dump ioapic version.
145 s->version = 0x11;
147 qdev_init_gpio_in(dev, kvm_ioapic_set_irq, IOAPIC_NUM_PINS);
150 static Property kvm_ioapic_properties[] = {
151 DEFINE_PROP_UINT32("gsi_base", KVMIOAPICState, kvm_gsi_base, 0),
152 DEFINE_PROP_END_OF_LIST()
155 static void kvm_ioapic_class_init(ObjectClass *klass, void *data)
157 IOAPICCommonClass *k = IOAPIC_COMMON_CLASS(klass);
158 DeviceClass *dc = DEVICE_CLASS(klass);
160 k->realize = kvm_ioapic_realize;
161 k->pre_save = kvm_ioapic_get;
162 k->post_load = kvm_ioapic_put;
163 dc->reset = kvm_ioapic_reset;
164 dc->props = kvm_ioapic_properties;
167 static const TypeInfo kvm_ioapic_info = {
168 .name = TYPE_KVM_IOAPIC,
169 .parent = TYPE_IOAPIC_COMMON,
170 .instance_size = sizeof(KVMIOAPICState),
171 .class_init = kvm_ioapic_class_init,
174 static void kvm_ioapic_register_types(void)
176 type_register_static(&kvm_ioapic_info);
179 type_init(kvm_ioapic_register_types)