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 static void kvm_pic_get(PICCommonState *s) 17 { 18 struct kvm_irqchip chip; 19 struct kvm_pic_state *kpic; 20 int ret; 21 22 chip.chip_id = s->master ? KVM_IRQCHIP_PIC_MASTER : KVM_IRQCHIP_PIC_SLAVE; 23 ret = kvm_vm_ioctl(kvm_state, KVM_GET_IRQCHIP, &chip); 24 if (ret < 0) { 25 fprintf(stderr, "KVM_GET_IRQCHIP failed: %s\n", strerror(ret)); 26 abort(); 27 } 28 29 kpic = &chip.chip.pic; 30 31 s->last_irr = kpic->last_irr; 32 s->irr = kpic->irr; 33 s->imr = kpic->imr; 34 s->isr = kpic->isr; 35 s->priority_add = kpic->priority_add; 36 s->irq_base = kpic->irq_base; 37 s->read_reg_select = kpic->read_reg_select; 38 s->poll = kpic->poll; 39 s->special_mask = kpic->special_mask; 40 s->init_state = kpic->init_state; 41 s->auto_eoi = kpic->auto_eoi; 42 s->rotate_on_auto_eoi = kpic->rotate_on_auto_eoi; 43 s->special_fully_nested_mode = kpic->special_fully_nested_mode; 44 s->init4 = kpic->init4; 45 s->elcr = kpic->elcr; 46 s->elcr_mask = kpic->elcr_mask; 47 } 48 49 static void kvm_pic_put(PICCommonState *s) 50 { 51 struct kvm_irqchip chip; 52 struct kvm_pic_state *kpic; 53 int ret; 54 55 chip.chip_id = s->master ? KVM_IRQCHIP_PIC_MASTER : KVM_IRQCHIP_PIC_SLAVE; 56 57 kpic = &chip.chip.pic; 58 59 kpic->last_irr = s->last_irr; 60 kpic->irr = s->irr; 61 kpic->imr = s->imr; 62 kpic->isr = s->isr; 63 kpic->priority_add = s->priority_add; 64 kpic->irq_base = s->irq_base; 65 kpic->read_reg_select = s->read_reg_select; 66 kpic->poll = s->poll; 67 kpic->special_mask = s->special_mask; 68 kpic->init_state = s->init_state; 69 kpic->auto_eoi = s->auto_eoi; 70 kpic->rotate_on_auto_eoi = s->rotate_on_auto_eoi; 71 kpic->special_fully_nested_mode = s->special_fully_nested_mode; 72 kpic->init4 = s->init4; 73 kpic->elcr = s->elcr; 74 kpic->elcr_mask = s->elcr_mask; 75 76 ret = kvm_vm_ioctl(kvm_state, KVM_SET_IRQCHIP, &chip); 77 if (ret < 0) { 78 fprintf(stderr, "KVM_GET_IRQCHIP failed: %s\n", strerror(ret)); 79 abort(); 80 } 81 } 82 83 static void kvm_pic_reset(DeviceState *dev) 84 { 85 PICCommonState *s = PIC_COMMON(dev); 86 87 s->elcr = 0; 88 pic_reset_common(s); 89 90 kvm_pic_put(s); 91 } 92 93 static void kvm_pic_set_irq(void *opaque, int irq, int level) 94 { 95 int delivered; 96 97 delivered = kvm_set_irq(kvm_state, irq, level); 98 apic_report_irq_delivered(delivered); 99 } 100 101 static void kvm_pic_init(PICCommonState *s) 102 { 103 memory_region_init_reservation(&s->base_io, "kvm-pic", 2); 104 memory_region_init_reservation(&s->elcr_io, "kvm-elcr", 1); 105 } 106 107 qemu_irq *kvm_i8259_init(ISABus *bus) 108 { 109 i8259_init_chip("kvm-i8259", bus, true); 110 i8259_init_chip("kvm-i8259", bus, false); 111 112 return qemu_allocate_irqs(kvm_pic_set_irq, NULL, ISA_NUM_IRQS); 113 } 114 115 static void kvm_i8259_class_init(ObjectClass *klass, void *data) 116 { 117 PICCommonClass *k = PIC_COMMON_CLASS(klass); 118 DeviceClass *dc = DEVICE_CLASS(klass); 119 120 dc->reset = kvm_pic_reset; 121 k->init = kvm_pic_init; 122 k->pre_save = kvm_pic_get; 123 k->post_load = kvm_pic_put; 124 } 125 126 static const TypeInfo kvm_i8259_info = { 127 .name = "kvm-i8259", 128 .parent = TYPE_PIC_COMMON, 129 .instance_size = sizeof(PICCommonState), 130 .class_init = kvm_i8259_class_init, 131 }; 132 133 static void kvm_pic_register_types(void) 134 { 135 type_register_static(&kvm_i8259_info); 136 } 137 138 type_init(kvm_pic_register_types) 139