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/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" 21 22 /* PC Utility function */ 23 void kvm_pc_setup_irq_routing(bool pci_enabled) 24 { 25 KVMState *s = kvm_state; 26 int i; 27 28 if (kvm_check_extension(s, KVM_CAP_IRQ_ROUTING)) { 29 for (i = 0; i < 8; ++i) { 30 if (i == 2) { 31 continue; 32 } 33 kvm_irqchip_add_irq_route(s, i, KVM_IRQCHIP_PIC_MASTER, i); 34 } 35 for (i = 8; i < 16; ++i) { 36 kvm_irqchip_add_irq_route(s, i, KVM_IRQCHIP_PIC_SLAVE, i - 8); 37 } 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); 44 } 45 } 46 } 47 kvm_irqchip_commit_routes(s); 48 } 49 } 50 51 void kvm_pc_gsi_handler(void *opaque, int n, int level) 52 { 53 GSIState *s = opaque; 54 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); 60 } 61 } 62 63 typedef struct KVMIOAPICState KVMIOAPICState; 64 65 struct KVMIOAPICState { 66 IOAPICCommonState ioapic; 67 uint32_t kvm_gsi_base; 68 }; 69 70 static void kvm_ioapic_get(IOAPICCommonState *s) 71 { 72 struct kvm_irqchip chip; 73 struct kvm_ioapic_state *kioapic; 74 int ret, i; 75 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(); 81 } 82 83 kioapic = &chip.chip.ioapic; 84 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; 90 } 91 } 92 93 static void kvm_ioapic_put(IOAPICCommonState *s) 94 { 95 struct kvm_irqchip chip; 96 struct kvm_ioapic_state *kioapic; 97 int ret, i; 98 99 chip.chip_id = KVM_IRQCHIP_IOAPIC; 100 kioapic = &chip.chip.ioapic; 101 102 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]; 108 } 109 110 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(); 114 } 115 } 116 117 static void kvm_ioapic_reset(DeviceState *dev) 118 { 119 IOAPICCommonState *s = IOAPIC_COMMON(dev); 120 121 ioapic_reset_common(dev); 122 kvm_ioapic_put(s); 123 } 124 125 static void kvm_ioapic_set_irq(void *opaque, int irq, int level) 126 { 127 KVMIOAPICState *s = opaque; 128 IOAPICCommonState *common = IOAPIC_COMMON(s); 129 int delivered; 130 131 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); 134 } 135 136 static void kvm_ioapic_realize(DeviceState *dev, Error **errp) 137 { 138 IOAPICCommonState *s = IOAPIC_COMMON(dev); 139 140 memory_region_init_io(&s->io_memory, OBJECT(dev), NULL, NULL, "kvm-ioapic", 0x1000); 141 /* 142 * KVM ioapic only supports 0x11 now. This will only be used when 143 * we want to dump ioapic version. 144 */ 145 s->version = 0x11; 146 147 qdev_init_gpio_in(dev, kvm_ioapic_set_irq, IOAPIC_NUM_PINS); 148 } 149 150 static Property kvm_ioapic_properties[] = { 151 DEFINE_PROP_UINT32("gsi_base", KVMIOAPICState, kvm_gsi_base, 0), 152 DEFINE_PROP_END_OF_LIST() 153 }; 154 155 static void kvm_ioapic_class_init(ObjectClass *klass, void *data) 156 { 157 IOAPICCommonClass *k = IOAPIC_COMMON_CLASS(klass); 158 DeviceClass *dc = DEVICE_CLASS(klass); 159 160 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; 165 } 166 167 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, 172 }; 173 174 static void kvm_ioapic_register_types(void) 175 { 176 type_register_static(&kvm_ioapic_info); 177 } 178 179 type_init(kvm_ioapic_register_types) 180