/* * KVM in-kernel PIC (i8259) support * * Copyright (c) 2011 Siemens AG * * Authors: * Jan Kiszka <jan.kiszka@siemens.com> * * This work is licensed under the terms of the GNU GPL version 2. * See the COPYING file in the top-level directory. */ #include "hw/i8259_internal.h" #include "hw/apic_internal.h" #include "kvm.h" static void kvm_pic_get(PICCommonState *s) { struct kvm_irqchip chip; struct kvm_pic_state *kpic; int ret; chip.chip_id = s->master ? KVM_IRQCHIP_PIC_MASTER : KVM_IRQCHIP_PIC_SLAVE; ret = kvm_vm_ioctl(kvm_state, KVM_GET_IRQCHIP, &chip); if (ret < 0) { fprintf(stderr, "KVM_GET_IRQCHIP failed: %s\n", strerror(ret)); abort(); } kpic = &chip.chip.pic; s->last_irr = kpic->last_irr; s->irr = kpic->irr; s->imr = kpic->imr; s->isr = kpic->isr; s->priority_add = kpic->priority_add; s->irq_base = kpic->irq_base; s->read_reg_select = kpic->read_reg_select; s->poll = kpic->poll; s->special_mask = kpic->special_mask; s->init_state = kpic->init_state; s->auto_eoi = kpic->auto_eoi; s->rotate_on_auto_eoi = kpic->rotate_on_auto_eoi; s->special_fully_nested_mode = kpic->special_fully_nested_mode; s->init4 = kpic->init4; s->elcr = kpic->elcr; s->elcr_mask = kpic->elcr_mask; } static void kvm_pic_put(PICCommonState *s) { struct kvm_irqchip chip; struct kvm_pic_state *kpic; int ret; chip.chip_id = s->master ? KVM_IRQCHIP_PIC_MASTER : KVM_IRQCHIP_PIC_SLAVE; kpic = &chip.chip.pic; kpic->last_irr = s->last_irr; kpic->irr = s->irr; kpic->imr = s->imr; kpic->isr = s->isr; kpic->priority_add = s->priority_add; kpic->irq_base = s->irq_base; kpic->read_reg_select = s->read_reg_select; kpic->poll = s->poll; kpic->special_mask = s->special_mask; kpic->init_state = s->init_state; kpic->auto_eoi = s->auto_eoi; kpic->rotate_on_auto_eoi = s->rotate_on_auto_eoi; kpic->special_fully_nested_mode = s->special_fully_nested_mode; kpic->init4 = s->init4; kpic->elcr = s->elcr; kpic->elcr_mask = s->elcr_mask; ret = kvm_vm_ioctl(kvm_state, KVM_SET_IRQCHIP, &chip); if (ret < 0) { fprintf(stderr, "KVM_GET_IRQCHIP failed: %s\n", strerror(ret)); abort(); } } static void kvm_pic_reset(DeviceState *dev) { PICCommonState *s = DO_UPCAST(PICCommonState, dev.qdev, dev); s->elcr = 0; pic_reset_common(s); kvm_pic_put(s); } static void kvm_pic_set_irq(void *opaque, int irq, int level) { int delivered; delivered = kvm_set_irq(kvm_state, irq, level); apic_report_irq_delivered(delivered); } static void kvm_pic_init(PICCommonState *s) { memory_region_init_reservation(&s->base_io, "kvm-pic", 2); memory_region_init_reservation(&s->elcr_io, "kvm-elcr", 1); } qemu_irq *kvm_i8259_init(ISABus *bus) { i8259_init_chip("kvm-i8259", bus, true); i8259_init_chip("kvm-i8259", bus, false); return qemu_allocate_irqs(kvm_pic_set_irq, NULL, ISA_NUM_IRQS); } static void kvm_i8259_class_init(ObjectClass *klass, void *data) { PICCommonClass *k = PIC_COMMON_CLASS(klass); DeviceClass *dc = DEVICE_CLASS(klass); dc->reset = kvm_pic_reset; k->init = kvm_pic_init; k->pre_save = kvm_pic_get; k->post_load = kvm_pic_put; } static TypeInfo kvm_i8259_info = { .name = "kvm-i8259", .parent = TYPE_PIC_COMMON, .instance_size = sizeof(PICCommonState), .class_init = kvm_i8259_class_init, }; static void kvm_pic_register_types(void) { type_register_static(&kvm_i8259_info); } type_init(kvm_pic_register_types)