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/isa/i8259_internal.h" 13 #include "hw/i386/apic_internal.h" 14 #include "sysemu/kvm.h" 15 16 #define TYPE_KVM_I8259 "kvm-i8259" 17 #define KVM_PIC_CLASS(class) \ 18 OBJECT_CLASS_CHECK(KVMPICClass, (class), TYPE_KVM_I8259) 19 #define KVM_PIC_GET_CLASS(obj) \ 20 OBJECT_GET_CLASS(KVMPICClass, (obj), TYPE_KVM_I8259) 21 22 /** 23 * KVMPICClass: 24 * @parent_realize: The parent's realizefn. 25 */ 26 typedef struct KVMPICClass { 27 PICCommonClass parent_class; 28 29 DeviceRealize parent_realize; 30 } KVMPICClass; 31 32 static void kvm_pic_get(PICCommonState *s) 33 { 34 struct kvm_irqchip chip; 35 struct kvm_pic_state *kpic; 36 int ret; 37 38 chip.chip_id = s->master ? KVM_IRQCHIP_PIC_MASTER : KVM_IRQCHIP_PIC_SLAVE; 39 ret = kvm_vm_ioctl(kvm_state, KVM_GET_IRQCHIP, &chip); 40 if (ret < 0) { 41 fprintf(stderr, "KVM_GET_IRQCHIP failed: %s\n", strerror(ret)); 42 abort(); 43 } 44 45 kpic = &chip.chip.pic; 46 47 s->last_irr = kpic->last_irr; 48 s->irr = kpic->irr; 49 s->imr = kpic->imr; 50 s->isr = kpic->isr; 51 s->priority_add = kpic->priority_add; 52 s->irq_base = kpic->irq_base; 53 s->read_reg_select = kpic->read_reg_select; 54 s->poll = kpic->poll; 55 s->special_mask = kpic->special_mask; 56 s->init_state = kpic->init_state; 57 s->auto_eoi = kpic->auto_eoi; 58 s->rotate_on_auto_eoi = kpic->rotate_on_auto_eoi; 59 s->special_fully_nested_mode = kpic->special_fully_nested_mode; 60 s->init4 = kpic->init4; 61 s->elcr = kpic->elcr; 62 s->elcr_mask = kpic->elcr_mask; 63 } 64 65 static void kvm_pic_put(PICCommonState *s) 66 { 67 struct kvm_irqchip chip; 68 struct kvm_pic_state *kpic; 69 int ret; 70 71 chip.chip_id = s->master ? KVM_IRQCHIP_PIC_MASTER : KVM_IRQCHIP_PIC_SLAVE; 72 73 kpic = &chip.chip.pic; 74 75 kpic->last_irr = s->last_irr; 76 kpic->irr = s->irr; 77 kpic->imr = s->imr; 78 kpic->isr = s->isr; 79 kpic->priority_add = s->priority_add; 80 kpic->irq_base = s->irq_base; 81 kpic->read_reg_select = s->read_reg_select; 82 kpic->poll = s->poll; 83 kpic->special_mask = s->special_mask; 84 kpic->init_state = s->init_state; 85 kpic->auto_eoi = s->auto_eoi; 86 kpic->rotate_on_auto_eoi = s->rotate_on_auto_eoi; 87 kpic->special_fully_nested_mode = s->special_fully_nested_mode; 88 kpic->init4 = s->init4; 89 kpic->elcr = s->elcr; 90 kpic->elcr_mask = s->elcr_mask; 91 92 ret = kvm_vm_ioctl(kvm_state, KVM_SET_IRQCHIP, &chip); 93 if (ret < 0) { 94 fprintf(stderr, "KVM_GET_IRQCHIP failed: %s\n", strerror(ret)); 95 abort(); 96 } 97 } 98 99 static void kvm_pic_reset(DeviceState *dev) 100 { 101 PICCommonState *s = PIC_COMMON(dev); 102 103 s->elcr = 0; 104 pic_reset_common(s); 105 106 kvm_pic_put(s); 107 } 108 109 static void kvm_pic_set_irq(void *opaque, int irq, int level) 110 { 111 int delivered; 112 113 delivered = kvm_set_irq(kvm_state, irq, level); 114 apic_report_irq_delivered(delivered); 115 } 116 117 static void kvm_pic_realize(DeviceState *dev, Error **errp) 118 { 119 PICCommonState *s = PIC_COMMON(dev); 120 KVMPICClass *kpc = KVM_PIC_GET_CLASS(dev); 121 122 memory_region_init_reservation(&s->base_io, "kvm-pic", 2); 123 memory_region_init_reservation(&s->elcr_io, "kvm-elcr", 1); 124 125 kpc->parent_realize(dev, errp); 126 } 127 128 qemu_irq *kvm_i8259_init(ISABus *bus) 129 { 130 i8259_init_chip(TYPE_KVM_I8259, bus, true); 131 i8259_init_chip(TYPE_KVM_I8259, bus, false); 132 133 return qemu_allocate_irqs(kvm_pic_set_irq, NULL, ISA_NUM_IRQS); 134 } 135 136 static void kvm_i8259_class_init(ObjectClass *klass, void *data) 137 { 138 KVMPICClass *kpc = KVM_PIC_CLASS(klass); 139 PICCommonClass *k = PIC_COMMON_CLASS(klass); 140 DeviceClass *dc = DEVICE_CLASS(klass); 141 142 dc->reset = kvm_pic_reset; 143 kpc->parent_realize = dc->realize; 144 dc->realize = kvm_pic_realize; 145 k->pre_save = kvm_pic_get; 146 k->post_load = kvm_pic_put; 147 } 148 149 static const TypeInfo kvm_i8259_info = { 150 .name = TYPE_KVM_I8259, 151 .parent = TYPE_PIC_COMMON, 152 .instance_size = sizeof(PICCommonState), 153 .class_init = kvm_i8259_class_init, 154 .class_size = sizeof(KVMPICClass), 155 }; 156 157 static void kvm_pic_register_types(void) 158 { 159 type_register_static(&kvm_i8259_info); 160 } 161 162 type_init(kvm_pic_register_types) 163