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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/i386/pc.h"
#include "hw/i386/ioapic_internal.h"
#include "hw/i386/apic_internal.h"
#include "sysemu/kvm.h"
/* PC Utility function */
void kvm_pc_setup_irq_routing(bool pci_enabled)
{
KVMState *s = kvm_state;
int i;
if (kvm_check_extension(s, KVM_CAP_IRQ_ROUTING)) {
for (i = 0; i < 8; ++i) {
if (i == 2) {
continue;
}
kvm_irqchip_add_irq_route(s, i, KVM_IRQCHIP_PIC_MASTER, i);
}
for (i = 8; i < 16; ++i) {
kvm_irqchip_add_irq_route(s, i, KVM_IRQCHIP_PIC_SLAVE, i - 8);
}
if (pci_enabled) {
for (i = 0; i < 24; ++i) {
if (i == 0) {
kvm_irqchip_add_irq_route(s, i, KVM_IRQCHIP_IOAPIC, 2);
} else if (i != 2) {
kvm_irqchip_add_irq_route(s, i, KVM_IRQCHIP_IOAPIC, i);
}
}
}
kvm_irqchip_commit_routes(s);
}
}
void kvm_pc_gsi_handler(void *opaque, int n, int level)
{
GSIState *s = opaque;
if (n < ISA_NUM_IRQS) {
/* Kernel will forward to both PIC and IOAPIC */
qemu_set_irq(s->i8259_irq[n], level);
} else {
qemu_set_irq(s->ioapic_irq[n], level);
}
}
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 = IOAPIC_COMMON(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_set_irq(kvm_state, s->kvm_gsi_base + irq, level);
apic_report_irq_delivered(delivered);
}
static void kvm_ioapic_realize(DeviceState *dev, Error **errp)
{
IOAPICCommonState *s = IOAPIC_COMMON(dev);
memory_region_init_reservation(&s->io_memory, NULL, "kvm-ioapic", 0x1000);
qdev_init_gpio_in(dev, kvm_ioapic_set_irq, IOAPIC_NUM_PINS);
}
static Property kvm_ioapic_properties[] = {
DEFINE_PROP_UINT32("gsi_base", KVMIOAPICState, kvm_gsi_base, 0),
DEFINE_PROP_END_OF_LIST()
};
static void kvm_ioapic_class_init(ObjectClass *klass, void *data)
{
IOAPICCommonClass *k = IOAPIC_COMMON_CLASS(klass);
DeviceClass *dc = DEVICE_CLASS(klass);
k->realize = kvm_ioapic_realize;
k->pre_save = kvm_ioapic_get;
k->post_load = kvm_ioapic_put;
dc->reset = kvm_ioapic_reset;
dc->props = kvm_ioapic_properties;
}
static const TypeInfo kvm_ioapic_info = {
.name = "kvm-ioapic",
.parent = TYPE_IOAPIC_COMMON,
.instance_size = sizeof(KVMIOAPICState),
.class_init = kvm_ioapic_class_init,
};
static void kvm_ioapic_register_types(void)
{
type_register_static(&kvm_ioapic_info);
}
type_init(kvm_ioapic_register_types)
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