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 "hw/intc/i8259.h" 16 #include "qemu/module.h" 17 #include "hw/i386/apic_internal.h" 18 #include "hw/irq.h" 19 #include "sysemu/kvm.h" 20 21 #define TYPE_KVM_I8259 "kvm-i8259" 22 #define KVM_PIC_CLASS(class) \ 23 OBJECT_CLASS_CHECK(KVMPICClass, (class), TYPE_KVM_I8259) 24 #define KVM_PIC_GET_CLASS(obj) \ 25 OBJECT_GET_CLASS(KVMPICClass, (obj), TYPE_KVM_I8259) 26 27 /** 28 * KVMPICClass: 29 * @parent_realize: The parent's realizefn. 30 */ 31 typedef struct KVMPICClass { 32 PICCommonClass parent_class; 33 34 DeviceRealize parent_realize; 35 } KVMPICClass; 36 37 static void kvm_pic_get(PICCommonState *s) 38 { 39 struct kvm_irqchip chip; 40 struct kvm_pic_state *kpic; 41 int ret; 42 43 chip.chip_id = s->master ? KVM_IRQCHIP_PIC_MASTER : KVM_IRQCHIP_PIC_SLAVE; 44 ret = kvm_vm_ioctl(kvm_state, KVM_GET_IRQCHIP, &chip); 45 if (ret < 0) { 46 fprintf(stderr, "KVM_GET_IRQCHIP failed: %s\n", strerror(ret)); 47 abort(); 48 } 49 50 kpic = &chip.chip.pic; 51 52 s->last_irr = kpic->last_irr; 53 s->irr = kpic->irr; 54 s->imr = kpic->imr; 55 s->isr = kpic->isr; 56 s->priority_add = kpic->priority_add; 57 s->irq_base = kpic->irq_base; 58 s->read_reg_select = kpic->read_reg_select; 59 s->poll = kpic->poll; 60 s->special_mask = kpic->special_mask; 61 s->init_state = kpic->init_state; 62 s->auto_eoi = kpic->auto_eoi; 63 s->rotate_on_auto_eoi = kpic->rotate_on_auto_eoi; 64 s->special_fully_nested_mode = kpic->special_fully_nested_mode; 65 s->init4 = kpic->init4; 66 s->elcr = kpic->elcr; 67 s->elcr_mask = kpic->elcr_mask; 68 } 69 70 static void kvm_pic_put(PICCommonState *s) 71 { 72 struct kvm_irqchip chip; 73 struct kvm_pic_state *kpic; 74 int ret; 75 76 chip.chip_id = s->master ? KVM_IRQCHIP_PIC_MASTER : KVM_IRQCHIP_PIC_SLAVE; 77 78 kpic = &chip.chip.pic; 79 80 kpic->last_irr = s->last_irr; 81 kpic->irr = s->irr; 82 kpic->imr = s->imr; 83 kpic->isr = s->isr; 84 kpic->priority_add = s->priority_add; 85 kpic->irq_base = s->irq_base; 86 kpic->read_reg_select = s->read_reg_select; 87 kpic->poll = s->poll; 88 kpic->special_mask = s->special_mask; 89 kpic->init_state = s->init_state; 90 kpic->auto_eoi = s->auto_eoi; 91 kpic->rotate_on_auto_eoi = s->rotate_on_auto_eoi; 92 kpic->special_fully_nested_mode = s->special_fully_nested_mode; 93 kpic->init4 = s->init4; 94 kpic->elcr = s->elcr; 95 kpic->elcr_mask = s->elcr_mask; 96 97 ret = kvm_vm_ioctl(kvm_state, KVM_SET_IRQCHIP, &chip); 98 if (ret < 0) { 99 fprintf(stderr, "KVM_SET_IRQCHIP failed: %s\n", strerror(ret)); 100 abort(); 101 } 102 } 103 104 static void kvm_pic_reset(DeviceState *dev) 105 { 106 PICCommonState *s = PIC_COMMON(dev); 107 108 s->elcr = 0; 109 pic_reset_common(s); 110 111 kvm_pic_put(s); 112 } 113 114 static void kvm_pic_set_irq(void *opaque, int irq, int level) 115 { 116 int delivered; 117 118 pic_stat_update_irq(irq, level); 119 delivered = kvm_set_irq(kvm_state, irq, level); 120 apic_report_irq_delivered(delivered); 121 } 122 123 static void kvm_pic_realize(DeviceState *dev, Error **errp) 124 { 125 PICCommonState *s = PIC_COMMON(dev); 126 KVMPICClass *kpc = KVM_PIC_GET_CLASS(dev); 127 128 memory_region_init_io(&s->base_io, OBJECT(dev), NULL, NULL, "kvm-pic", 2); 129 memory_region_init_io(&s->elcr_io, OBJECT(dev), NULL, NULL, "kvm-elcr", 1); 130 131 kpc->parent_realize(dev, errp); 132 } 133 134 qemu_irq *kvm_i8259_init(ISABus *bus) 135 { 136 i8259_init_chip(TYPE_KVM_I8259, bus, true); 137 i8259_init_chip(TYPE_KVM_I8259, bus, false); 138 139 return qemu_allocate_irqs(kvm_pic_set_irq, NULL, ISA_NUM_IRQS); 140 } 141 142 static void kvm_i8259_class_init(ObjectClass *klass, void *data) 143 { 144 KVMPICClass *kpc = KVM_PIC_CLASS(klass); 145 PICCommonClass *k = PIC_COMMON_CLASS(klass); 146 DeviceClass *dc = DEVICE_CLASS(klass); 147 148 dc->reset = kvm_pic_reset; 149 device_class_set_parent_realize(dc, kvm_pic_realize, &kpc->parent_realize); 150 k->pre_save = kvm_pic_get; 151 k->post_load = kvm_pic_put; 152 } 153 154 static const TypeInfo kvm_i8259_info = { 155 .name = TYPE_KVM_I8259, 156 .parent = TYPE_PIC_COMMON, 157 .instance_size = sizeof(PICCommonState), 158 .class_init = kvm_i8259_class_init, 159 .class_size = sizeof(KVMPICClass), 160 }; 161 162 static void kvm_pic_register_types(void) 163 { 164 type_register_static(&kvm_i8259_info); 165 } 166 167 type_init(kvm_pic_register_types) 168