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 "qemu/osdep.h" 14 #include "monitor/monitor.h" 15 #include "hw/qdev-properties.h" 16 #include "hw/intc/ioapic_internal.h" 17 #include "hw/intc/kvm_irqcount.h" 18 #include "sysemu/kvm.h" 19 20 /* PC Utility function */ 21 void kvm_pc_setup_irq_routing(bool pci_enabled) 22 { 23 KVMState *s = kvm_state; 24 int i; 25 26 assert(kvm_has_gsi_routing()); 27 for (i = 0; i < 8; ++i) { 28 if (i == 2) { 29 continue; 30 } 31 kvm_irqchip_add_irq_route(s, i, KVM_IRQCHIP_PIC_MASTER, i); 32 } 33 for (i = 8; i < 16; ++i) { 34 kvm_irqchip_add_irq_route(s, i, KVM_IRQCHIP_PIC_SLAVE, i - 8); 35 } 36 if (pci_enabled) { 37 for (i = 0; i < 24; ++i) { 38 if (i == 0) { 39 kvm_irqchip_add_irq_route(s, i, KVM_IRQCHIP_IOAPIC, 2); 40 } else if (i != 2) { 41 kvm_irqchip_add_irq_route(s, i, KVM_IRQCHIP_IOAPIC, i); 42 } 43 } 44 } 45 kvm_irqchip_commit_routes(s); 46 } 47 48 typedef struct KVMIOAPICState KVMIOAPICState; 49 50 struct KVMIOAPICState { 51 IOAPICCommonState ioapic; 52 uint32_t kvm_gsi_base; 53 }; 54 55 static void kvm_ioapic_get(IOAPICCommonState *s) 56 { 57 struct kvm_irqchip chip; 58 struct kvm_ioapic_state *kioapic; 59 int ret, i; 60 61 chip.chip_id = KVM_IRQCHIP_IOAPIC; 62 ret = kvm_vm_ioctl(kvm_state, KVM_GET_IRQCHIP, &chip); 63 if (ret < 0) { 64 fprintf(stderr, "KVM_GET_IRQCHIP failed: %s\n", strerror(-ret)); 65 abort(); 66 } 67 68 kioapic = &chip.chip.ioapic; 69 70 s->id = kioapic->id; 71 s->ioregsel = kioapic->ioregsel; 72 s->irr = kioapic->irr; 73 for (i = 0; i < IOAPIC_NUM_PINS; i++) { 74 s->ioredtbl[i] = kioapic->redirtbl[i].bits; 75 } 76 } 77 78 static void kvm_ioapic_put(IOAPICCommonState *s) 79 { 80 struct kvm_irqchip chip; 81 struct kvm_ioapic_state *kioapic; 82 int ret, i; 83 84 chip.chip_id = KVM_IRQCHIP_IOAPIC; 85 kioapic = &chip.chip.ioapic; 86 87 kioapic->id = s->id; 88 kioapic->ioregsel = s->ioregsel; 89 kioapic->base_address = s->busdev.mmio[0].addr; 90 kioapic->irr = s->irr; 91 for (i = 0; i < IOAPIC_NUM_PINS; i++) { 92 kioapic->redirtbl[i].bits = s->ioredtbl[i]; 93 } 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 } 101 102 static void kvm_ioapic_reset(DeviceState *dev) 103 { 104 IOAPICCommonState *s = IOAPIC_COMMON(dev); 105 106 ioapic_reset_common(dev); 107 kvm_ioapic_put(s); 108 } 109 110 static void kvm_ioapic_set_irq(void *opaque, int irq, int level) 111 { 112 KVMIOAPICState *s = opaque; 113 IOAPICCommonState *common = IOAPIC_COMMON(s); 114 int delivered; 115 116 ioapic_stat_update_irq(common, irq, level); 117 delivered = kvm_set_irq(kvm_state, s->kvm_gsi_base + irq, level); 118 kvm_report_irq_delivered(delivered); 119 } 120 121 static void kvm_ioapic_realize(DeviceState *dev, Error **errp) 122 { 123 IOAPICCommonState *s = IOAPIC_COMMON(dev); 124 125 memory_region_init_io(&s->io_memory, OBJECT(dev), NULL, NULL, "kvm-ioapic", 0x1000); 126 /* 127 * KVM ioapic only supports 0x11 now. This will only be used when 128 * we want to dump ioapic version. 129 */ 130 s->version = 0x11; 131 132 qdev_init_gpio_in(dev, kvm_ioapic_set_irq, IOAPIC_NUM_PINS); 133 } 134 135 static Property kvm_ioapic_properties[] = { 136 DEFINE_PROP_UINT32("gsi_base", KVMIOAPICState, kvm_gsi_base, 0), 137 DEFINE_PROP_END_OF_LIST() 138 }; 139 140 static void kvm_ioapic_class_init(ObjectClass *klass, void *data) 141 { 142 IOAPICCommonClass *k = IOAPIC_COMMON_CLASS(klass); 143 DeviceClass *dc = DEVICE_CLASS(klass); 144 145 k->realize = kvm_ioapic_realize; 146 k->pre_save = kvm_ioapic_get; 147 k->post_load = kvm_ioapic_put; 148 dc->reset = kvm_ioapic_reset; 149 device_class_set_props(dc, kvm_ioapic_properties); 150 } 151 152 static const TypeInfo kvm_ioapic_info = { 153 .name = TYPE_KVM_IOAPIC, 154 .parent = TYPE_IOAPIC_COMMON, 155 .instance_size = sizeof(KVMIOAPICState), 156 .class_init = kvm_ioapic_class_init, 157 }; 158 159 static void kvm_ioapic_register_types(void) 160 { 161 type_register_static(&kvm_ioapic_info); 162 } 163 164 type_init(kvm_ioapic_register_types) 165