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 18 static void kvm_pic_get(PICCommonState *s) 19 { 20 struct kvm_irqchip chip; 21 struct kvm_pic_state *kpic; 22 int ret; 23 24 chip.chip_id = s->master ? KVM_IRQCHIP_PIC_MASTER : KVM_IRQCHIP_PIC_SLAVE; 25 ret = kvm_vm_ioctl(kvm_state, KVM_GET_IRQCHIP, &chip); 26 if (ret < 0) { 27 fprintf(stderr, "KVM_GET_IRQCHIP failed: %s\n", strerror(ret)); 28 abort(); 29 } 30 31 kpic = &chip.chip.pic; 32 33 s->last_irr = kpic->last_irr; 34 s->irr = kpic->irr; 35 s->imr = kpic->imr; 36 s->isr = kpic->isr; 37 s->priority_add = kpic->priority_add; 38 s->irq_base = kpic->irq_base; 39 s->read_reg_select = kpic->read_reg_select; 40 s->poll = kpic->poll; 41 s->special_mask = kpic->special_mask; 42 s->init_state = kpic->init_state; 43 s->auto_eoi = kpic->auto_eoi; 44 s->rotate_on_auto_eoi = kpic->rotate_on_auto_eoi; 45 s->special_fully_nested_mode = kpic->special_fully_nested_mode; 46 s->init4 = kpic->init4; 47 s->elcr = kpic->elcr; 48 s->elcr_mask = kpic->elcr_mask; 49 } 50 51 static void kvm_pic_put(PICCommonState *s) 52 { 53 struct kvm_irqchip chip; 54 struct kvm_pic_state *kpic; 55 int ret; 56 57 chip.chip_id = s->master ? KVM_IRQCHIP_PIC_MASTER : KVM_IRQCHIP_PIC_SLAVE; 58 59 kpic = &chip.chip.pic; 60 61 kpic->last_irr = s->last_irr; 62 kpic->irr = s->irr; 63 kpic->imr = s->imr; 64 kpic->isr = s->isr; 65 kpic->priority_add = s->priority_add; 66 kpic->irq_base = s->irq_base; 67 kpic->read_reg_select = s->read_reg_select; 68 kpic->poll = s->poll; 69 kpic->special_mask = s->special_mask; 70 kpic->init_state = s->init_state; 71 kpic->auto_eoi = s->auto_eoi; 72 kpic->rotate_on_auto_eoi = s->rotate_on_auto_eoi; 73 kpic->special_fully_nested_mode = s->special_fully_nested_mode; 74 kpic->init4 = s->init4; 75 kpic->elcr = s->elcr; 76 kpic->elcr_mask = s->elcr_mask; 77 78 ret = kvm_vm_ioctl(kvm_state, KVM_SET_IRQCHIP, &chip); 79 if (ret < 0) { 80 fprintf(stderr, "KVM_GET_IRQCHIP failed: %s\n", strerror(ret)); 81 abort(); 82 } 83 } 84 85 static void kvm_pic_reset(DeviceState *dev) 86 { 87 PICCommonState *s = PIC_COMMON(dev); 88 89 s->elcr = 0; 90 pic_reset_common(s); 91 92 kvm_pic_put(s); 93 } 94 95 static void kvm_pic_set_irq(void *opaque, int irq, int level) 96 { 97 int delivered; 98 99 delivered = kvm_set_irq(kvm_state, irq, level); 100 apic_report_irq_delivered(delivered); 101 } 102 103 static void kvm_pic_init(PICCommonState *s) 104 { 105 memory_region_init_reservation(&s->base_io, "kvm-pic", 2); 106 memory_region_init_reservation(&s->elcr_io, "kvm-elcr", 1); 107 } 108 109 qemu_irq *kvm_i8259_init(ISABus *bus) 110 { 111 i8259_init_chip(TYPE_KVM_I8259, bus, true); 112 i8259_init_chip(TYPE_KVM_I8259, bus, false); 113 114 return qemu_allocate_irqs(kvm_pic_set_irq, NULL, ISA_NUM_IRQS); 115 } 116 117 static void kvm_i8259_class_init(ObjectClass *klass, void *data) 118 { 119 PICCommonClass *k = PIC_COMMON_CLASS(klass); 120 DeviceClass *dc = DEVICE_CLASS(klass); 121 122 dc->reset = kvm_pic_reset; 123 k->init = kvm_pic_init; 124 k->pre_save = kvm_pic_get; 125 k->post_load = kvm_pic_put; 126 } 127 128 static const TypeInfo kvm_i8259_info = { 129 .name = TYPE_KVM_I8259, 130 .parent = TYPE_PIC_COMMON, 131 .instance_size = sizeof(PICCommonState), 132 .class_init = kvm_i8259_class_init, 133 }; 134 135 static void kvm_pic_register_types(void) 136 { 137 type_register_static(&kvm_i8259_info); 138 } 139 140 type_init(kvm_pic_register_types) 141