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/*
* KVM in-kernel IOPIC 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/pc.h"
#include "hw/ioapic_internal.h"
#include "hw/apic_internal.h"
#include "kvm.h"
typedef struct KVMIOAPICState KVMIOAPICState;
struct KVMIOAPICState {
IOAPICCommonState ioapic;
uint32_t kvm_gsi_base;
};
static void kvm_ioapic_get(IOAPICCommonState *s)
{
struct kvm_irqchip chip;
struct kvm_ioapic_state *kioapic;
int ret, i;
chip.chip_id = KVM_IRQCHIP_IOAPIC;
ret = kvm_vm_ioctl(kvm_state, KVM_GET_IRQCHIP, &chip);
if (ret < 0) {
fprintf(stderr, "KVM_GET_IRQCHIP failed: %s\n", strerror(ret));
abort();
}
kioapic = &chip.chip.ioapic;
s->id = kioapic->id;
s->ioregsel = kioapic->ioregsel;
s->irr = kioapic->irr;
for (i = 0; i < IOAPIC_NUM_PINS; i++) {
s->ioredtbl[i] = kioapic->redirtbl[i].bits;
}
}
static void kvm_ioapic_put(IOAPICCommonState *s)
{
struct kvm_irqchip chip;
struct kvm_ioapic_state *kioapic;
int ret, i;
chip.chip_id = KVM_IRQCHIP_IOAPIC;
kioapic = &chip.chip.ioapic;
kioapic->id = s->id;
kioapic->ioregsel = s->ioregsel;
kioapic->base_address = s->busdev.mmio[0].addr;
kioapic->irr = s->irr;
for (i = 0; i < IOAPIC_NUM_PINS; i++) {
kioapic->redirtbl[i].bits = s->ioredtbl[i];
}
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_ioapic_reset(DeviceState *dev)
{
IOAPICCommonState *s = DO_UPCAST(IOAPICCommonState, busdev.qdev, dev);
ioapic_reset_common(dev);
kvm_ioapic_put(s);
}
static void kvm_ioapic_set_irq(void *opaque, int irq, int level)
{
KVMIOAPICState *s = opaque;
int delivered;
delivered = kvm_irqchip_set_irq(kvm_state, s->kvm_gsi_base + irq, level);
apic_report_irq_delivered(delivered);
}
static void kvm_ioapic_init(IOAPICCommonState *s, int instance_no)
{
memory_region_init_reservation(&s->io_memory, "kvm-ioapic", 0x1000);
qdev_init_gpio_in(&s->busdev.qdev, kvm_ioapic_set_irq, IOAPIC_NUM_PINS);
}
static void kvm_ioapic_class_init(ObjectClass *klass, void *data)
{
IOAPICCommonClass *k = IOAPIC_COMMON_CLASS(klass);
k->init = kvm_ioapic_init;
k->pre_save = kvm_ioapic_get;
k->post_load = kvm_ioapic_put;
}
static DeviceInfo kvm_ioapic_info = {
.name = "kvm-ioapic",
.size = sizeof(KVMIOAPICState),
.reset = kvm_ioapic_reset,
.class_init = kvm_ioapic_class_init,
.props = (Property[]) {
DEFINE_PROP_UINT32("gsi_base", KVMIOAPICState, kvm_gsi_base, 0),
DEFINE_PROP_END_OF_LIST()
},
};
static void kvm_ioapic_register_device(void)
{
ioapic_qdev_register(&kvm_ioapic_info);
}
device_init(kvm_ioapic_register_device)
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