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 13 #include "qemu/osdep.h" 14 #include "hw/isa/i8259_internal.h" 15 #include "qemu/module.h" 16 #include "hw/i386/apic_internal.h" 17 #include "sysemu/kvm.h" 18 19 #define TYPE_KVM_I8259 "kvm-i8259" 20 #define KVM_PIC_CLASS(class) \ 21 OBJECT_CLASS_CHECK(KVMPICClass, (class), TYPE_KVM_I8259) 22 #define KVM_PIC_GET_CLASS(obj) \ 23 OBJECT_GET_CLASS(KVMPICClass, (obj), TYPE_KVM_I8259) 24 25 /** 26 * KVMPICClass: 27 * @parent_realize: The parent's realizefn. 28 */ 29 typedef struct KVMPICClass { 30 PICCommonClass parent_class; 31 32 DeviceRealize parent_realize; 33 } KVMPICClass; 34 35 static void kvm_pic_get(PICCommonState *s) 36 { 37 struct kvm_irqchip chip; 38 struct kvm_pic_state *kpic; 39 int ret; 40 41 chip.chip_id = s->master ? KVM_IRQCHIP_PIC_MASTER : KVM_IRQCHIP_PIC_SLAVE; 42 ret = kvm_vm_ioctl(kvm_state, KVM_GET_IRQCHIP, &chip); 43 if (ret < 0) { 44 fprintf(stderr, "KVM_GET_IRQCHIP failed: %s\n", strerror(ret)); 45 abort(); 46 } 47 48 kpic = &chip.chip.pic; 49 50 s->last_irr = kpic->last_irr; 51 s->irr = kpic->irr; 52 s->imr = kpic->imr; 53 s->isr = kpic->isr; 54 s->priority_add = kpic->priority_add; 55 s->irq_base = kpic->irq_base; 56 s->read_reg_select = kpic->read_reg_select; 57 s->poll = kpic->poll; 58 s->special_mask = kpic->special_mask; 59 s->init_state = kpic->init_state; 60 s->auto_eoi = kpic->auto_eoi; 61 s->rotate_on_auto_eoi = kpic->rotate_on_auto_eoi; 62 s->special_fully_nested_mode = kpic->special_fully_nested_mode; 63 s->init4 = kpic->init4; 64 s->elcr = kpic->elcr; 65 s->elcr_mask = kpic->elcr_mask; 66 } 67 68 static void kvm_pic_put(PICCommonState *s) 69 { 70 struct kvm_irqchip chip; 71 struct kvm_pic_state *kpic; 72 int ret; 73 74 chip.chip_id = s->master ? KVM_IRQCHIP_PIC_MASTER : KVM_IRQCHIP_PIC_SLAVE; 75 76 kpic = &chip.chip.pic; 77 78 kpic->last_irr = s->last_irr; 79 kpic->irr = s->irr; 80 kpic->imr = s->imr; 81 kpic->isr = s->isr; 82 kpic->priority_add = s->priority_add; 83 kpic->irq_base = s->irq_base; 84 kpic->read_reg_select = s->read_reg_select; 85 kpic->poll = s->poll; 86 kpic->special_mask = s->special_mask; 87 kpic->init_state = s->init_state; 88 kpic->auto_eoi = s->auto_eoi; 89 kpic->rotate_on_auto_eoi = s->rotate_on_auto_eoi; 90 kpic->special_fully_nested_mode = s->special_fully_nested_mode; 91 kpic->init4 = s->init4; 92 kpic->elcr = s->elcr; 93 kpic->elcr_mask = s->elcr_mask; 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_pic_reset(DeviceState *dev) 103 { 104 PICCommonState *s = PIC_COMMON(dev); 105 106 s->elcr = 0; 107 pic_reset_common(s); 108 109 kvm_pic_put(s); 110 } 111 112 static void kvm_pic_set_irq(void *opaque, int irq, int level) 113 { 114 int delivered; 115 116 pic_stat_update_irq(irq, level); 117 delivered = kvm_set_irq(kvm_state, irq, level); 118 apic_report_irq_delivered(delivered); 119 } 120 121 static void kvm_pic_realize(DeviceState *dev, Error **errp) 122 { 123 PICCommonState *s = PIC_COMMON(dev); 124 KVMPICClass *kpc = KVM_PIC_GET_CLASS(dev); 125 126 memory_region_init_io(&s->base_io, OBJECT(dev), NULL, NULL, "kvm-pic", 2); 127 memory_region_init_io(&s->elcr_io, OBJECT(dev), NULL, NULL, "kvm-elcr", 1); 128 129 kpc->parent_realize(dev, errp); 130 } 131 132 qemu_irq *kvm_i8259_init(ISABus *bus) 133 { 134 i8259_init_chip(TYPE_KVM_I8259, bus, true); 135 i8259_init_chip(TYPE_KVM_I8259, bus, false); 136 137 return qemu_allocate_irqs(kvm_pic_set_irq, NULL, ISA_NUM_IRQS); 138 } 139 140 static void kvm_i8259_class_init(ObjectClass *klass, void *data) 141 { 142 KVMPICClass *kpc = KVM_PIC_CLASS(klass); 143 PICCommonClass *k = PIC_COMMON_CLASS(klass); 144 DeviceClass *dc = DEVICE_CLASS(klass); 145 146 dc->reset = kvm_pic_reset; 147 device_class_set_parent_realize(dc, kvm_pic_realize, &kpc->parent_realize); 148 k->pre_save = kvm_pic_get; 149 k->post_load = kvm_pic_put; 150 } 151 152 static const TypeInfo kvm_i8259_info = { 153 .name = TYPE_KVM_I8259, 154 .parent = TYPE_PIC_COMMON, 155 .instance_size = sizeof(PICCommonState), 156 .class_init = kvm_i8259_class_init, 157 .class_size = sizeof(KVMPICClass), 158 }; 159 160 static void kvm_pic_register_types(void) 161 { 162 type_register_static(&kvm_i8259_info); 163 } 164 165 type_init(kvm_pic_register_types) 166