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/*
* 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 "qemu/osdep.h"
#include "hw/isa/i8259_internal.h"
#include "qemu/module.h"
#include "hw/i386/apic_internal.h"
#include "hw/irq.h"
#include "sysemu/kvm.h"
#define TYPE_KVM_I8259 "kvm-i8259"
#define KVM_PIC_CLASS(class) \
OBJECT_CLASS_CHECK(KVMPICClass, (class), TYPE_KVM_I8259)
#define KVM_PIC_GET_CLASS(obj) \
OBJECT_GET_CLASS(KVMPICClass, (obj), TYPE_KVM_I8259)
/**
* KVMPICClass:
* @parent_realize: The parent's realizefn.
*/
typedef struct KVMPICClass {
PICCommonClass parent_class;
DeviceRealize parent_realize;
} KVMPICClass;
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_SET_IRQCHIP failed: %s\n", strerror(ret));
abort();
}
}
static void kvm_pic_reset(DeviceState *dev)
{
PICCommonState *s = PIC_COMMON(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;
pic_stat_update_irq(irq, level);
delivered = kvm_set_irq(kvm_state, irq, level);
apic_report_irq_delivered(delivered);
}
static void kvm_pic_realize(DeviceState *dev, Error **errp)
{
PICCommonState *s = PIC_COMMON(dev);
KVMPICClass *kpc = KVM_PIC_GET_CLASS(dev);
memory_region_init_io(&s->base_io, OBJECT(dev), NULL, NULL, "kvm-pic", 2);
memory_region_init_io(&s->elcr_io, OBJECT(dev), NULL, NULL, "kvm-elcr", 1);
kpc->parent_realize(dev, errp);
}
qemu_irq *kvm_i8259_init(ISABus *bus)
{
i8259_init_chip(TYPE_KVM_I8259, bus, true);
i8259_init_chip(TYPE_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)
{
KVMPICClass *kpc = KVM_PIC_CLASS(klass);
PICCommonClass *k = PIC_COMMON_CLASS(klass);
DeviceClass *dc = DEVICE_CLASS(klass);
dc->reset = kvm_pic_reset;
device_class_set_parent_realize(dc, kvm_pic_realize, &kpc->parent_realize);
k->pre_save = kvm_pic_get;
k->post_load = kvm_pic_put;
}
static const TypeInfo kvm_i8259_info = {
.name = TYPE_KVM_I8259,
.parent = TYPE_PIC_COMMON,
.instance_size = sizeof(PICCommonState),
.class_init = kvm_i8259_class_init,
.class_size = sizeof(KVMPICClass),
};
static void kvm_pic_register_types(void)
{
type_register_static(&kvm_i8259_info);
}
type_init(kvm_pic_register_types)
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