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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 "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);
pic_reset_common(s);
s->elcr = 0;
kvm_pic_put(s);
}
static void kvm_pic_set_irq(void *opaque, int irq, int level)
{
int delivered;
delivered = kvm_irqchip_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)
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