static void kvm_pit_vm_state_change(void *opaque, int running,
RunState state)
{
KVMPITState *s = opaque;
if (running) {
kvm_pit_update_clock_offset(s);
kvm_pit_put(PIT_COMMON(s));
s->vm_stopped = false;
} else {
kvm_pit_update_clock_offset(s);
kvm_pit_get(PIT_COMMON(s));
s->vm_stopped = true;
}
}
static void kvm_pit_reset(DeviceState *dev)
{
PITCommonState *s = PIT_COMMON(dev);
pit_reset_common(s);
kvm_pit_put(s);
}
static void kvm_pit_realizefn(DeviceState *dev, Error **errp)
{
PITCommonState *pit = PIT_COMMON(dev);
KVMPITClass *kpc = KVM_PIT_GET_CLASS(dev);
KVMPITState *s = KVM_PIT(pit);
struct kvm_pit_config config = {
.flags = 0,
};
int ret;
if (kvm_check_extension(kvm_state, KVM_CAP_PIT2)) {
ret = kvm_vm_ioctl(kvm_state, KVM_CREATE_PIT2, &config);
} else {
ret = kvm_vm_ioctl(kvm_state, KVM_CREATE_PIT);
}
if (ret < 0) {
error_setg(errp, "Create kernel PIC irqchip failed: %s",
strerror(ret));
return;
}
switch (s->lost_tick_policy) {
case LOST_TICK_DELAY:
break; /* enabled by default */
case LOST_TICK_DISCARD:
if (kvm_check_extension(kvm_state, KVM_CAP_REINJECT_CONTROL)) {
struct kvm_reinject_control control = { .pit_reinject = 0 };
ret = kvm_vm_ioctl(kvm_state, KVM_REINJECT_CONTROL, &control);
if (ret < 0) {
error_setg(errp,
"Can't disable in-kernel PIT reinjection: %s",
strerror(ret));
return;
}
}
break;
default:
error_setg(errp, "Lost tick policy not supported.");
return;
}
memory_region_init_reservation(&pit->ioports, NULL, "kvm-pit", 4);
qdev_init_gpio_in(dev, kvm_pit_irq_control, 1);
qemu_add_vm_change_state_handler(kvm_pit_vm_state_change, s);
kpc->parent_realize(dev, errp);
}
static Property kvm_pit_properties[] = {
DEFINE_PROP_HEX32("iobase", PITCommonState, iobase, -1),
DEFINE_PROP_LOSTTICKPOLICY("lost_tick_policy", KVMPITState,
lost_tick_policy, LOST_TICK_DELAY),
DEFINE_PROP_END_OF_LIST(),
};
static void kvm_pit_class_init(ObjectClass *klass, void *data)
{
KVMPITClass *kpc = KVM_PIT_CLASS(klass);
PITCommonClass *k = PIT_COMMON_CLASS(klass);
DeviceClass *dc = DEVICE_CLASS(klass);
kpc->parent_realize = dc->realize;
dc->realize = kvm_pit_realizefn;
k->set_channel_gate = kvm_pit_set_gate;
k->get_channel_info = kvm_pit_get_channel_info;
k->pre_save = kvm_pit_get;
k->post_load = kvm_pit_put;
dc->reset = kvm_pit_reset;
dc->props = kvm_pit_properties;
}
static const TypeInfo kvm_pit_info = {
.name = TYPE_KVM_I8254,
.parent = TYPE_PIT_COMMON,
.instance_size = sizeof(KVMPITState),
.class_init = kvm_pit_class_init,
.class_size = sizeof(KVMPITClass),
};
static void kvm_pit_register(void)
{
type_register_static(&kvm_pit_info);
}
type_init(kvm_pit_register)