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/*
* Hyper-V guest/hypervisor interaction
*
* Copyright (c) 2015-2018 Virtuozzo International GmbH.
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "qemu/main-loop.h"
#include "qapi/error.h"
#include "sysemu/kvm.h"
#include "hw/hyperv/hyperv.h"
typedef struct SynICState {
DeviceState parent_obj;
CPUState *cs;
bool enabled;
hwaddr msg_page_addr;
hwaddr event_page_addr;
} SynICState;
#define TYPE_SYNIC "hyperv-synic"
#define SYNIC(obj) OBJECT_CHECK(SynICState, (obj), TYPE_SYNIC)
static SynICState *get_synic(CPUState *cs)
{
return SYNIC(object_resolve_path_component(OBJECT(cs), "synic"));
}
static void synic_update(SynICState *synic, bool enable,
hwaddr msg_page_addr, hwaddr event_page_addr)
{
synic->enabled = enable;
synic->msg_page_addr = msg_page_addr;
synic->event_page_addr = event_page_addr;
}
void hyperv_synic_update(CPUState *cs, bool enable,
hwaddr msg_page_addr, hwaddr event_page_addr)
{
SynICState *synic = get_synic(cs);
if (!synic) {
return;
}
synic_update(synic, enable, msg_page_addr, event_page_addr);
}
static void synic_realize(DeviceState *dev, Error **errp)
{
}
static void synic_reset(DeviceState *dev)
{
SynICState *synic = SYNIC(dev);
synic_update(synic, false, 0, 0);
}
static void synic_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->realize = synic_realize;
dc->reset = synic_reset;
dc->user_creatable = false;
}
void hyperv_synic_add(CPUState *cs)
{
Object *obj;
SynICState *synic;
obj = object_new(TYPE_SYNIC);
synic = SYNIC(obj);
synic->cs = cs;
object_property_add_child(OBJECT(cs), "synic", obj, &error_abort);
object_unref(obj);
object_property_set_bool(obj, true, "realized", &error_abort);
}
void hyperv_synic_reset(CPUState *cs)
{
device_reset(DEVICE(get_synic(cs)));
}
static const TypeInfo synic_type_info = {
.name = TYPE_SYNIC,
.parent = TYPE_DEVICE,
.instance_size = sizeof(SynICState),
.class_init = synic_class_init,
};
static void synic_register_types(void)
{
type_register_static(&synic_type_info);
}
type_init(synic_register_types)
struct HvSintRoute {
uint32_t sint;
SynICState *synic;
int gsi;
EventNotifier sint_set_notifier;
EventNotifier sint_ack_notifier;
HvSintAckClb sint_ack_clb;
void *sint_ack_clb_data;
unsigned refcount;
};
static CPUState *hyperv_find_vcpu(uint32_t vp_index)
{
CPUState *cs = qemu_get_cpu(vp_index);
assert(hyperv_vp_index(cs) == vp_index);
return cs;
}
static void kvm_hv_sint_ack_handler(EventNotifier *notifier)
{
HvSintRoute *sint_route = container_of(notifier, HvSintRoute,
sint_ack_notifier);
event_notifier_test_and_clear(notifier);
sint_route->sint_ack_clb(sint_route->sint_ack_clb_data);
}
HvSintRoute *hyperv_sint_route_new(uint32_t vp_index, uint32_t sint,
HvSintAckClb sint_ack_clb,
void *sint_ack_clb_data)
{
HvSintRoute *sint_route;
EventNotifier *ack_notifier;
int r, gsi;
CPUState *cs;
SynICState *synic;
cs = hyperv_find_vcpu(vp_index);
if (!cs) {
return NULL;
}
synic = get_synic(cs);
if (!synic) {
return NULL;
}
sint_route = g_new0(HvSintRoute, 1);
r = event_notifier_init(&sint_route->sint_set_notifier, false);
if (r) {
goto err;
}
ack_notifier = sint_ack_clb ? &sint_route->sint_ack_notifier : NULL;
if (ack_notifier) {
r = event_notifier_init(ack_notifier, false);
if (r) {
goto err_sint_set_notifier;
}
event_notifier_set_handler(ack_notifier, kvm_hv_sint_ack_handler);
}
gsi = kvm_irqchip_add_hv_sint_route(kvm_state, vp_index, sint);
if (gsi < 0) {
goto err_gsi;
}
r = kvm_irqchip_add_irqfd_notifier_gsi(kvm_state,
&sint_route->sint_set_notifier,
ack_notifier, gsi);
if (r) {
goto err_irqfd;
}
sint_route->gsi = gsi;
sint_route->sint_ack_clb = sint_ack_clb;
sint_route->sint_ack_clb_data = sint_ack_clb_data;
sint_route->synic = synic;
sint_route->sint = sint;
sint_route->refcount = 1;
return sint_route;
err_irqfd:
kvm_irqchip_release_virq(kvm_state, gsi);
err_gsi:
if (ack_notifier) {
event_notifier_set_handler(ack_notifier, NULL);
event_notifier_cleanup(ack_notifier);
}
err_sint_set_notifier:
event_notifier_cleanup(&sint_route->sint_set_notifier);
err:
g_free(sint_route);
return NULL;
}
void hyperv_sint_route_ref(HvSintRoute *sint_route)
{
sint_route->refcount++;
}
void hyperv_sint_route_unref(HvSintRoute *sint_route)
{
if (!sint_route) {
return;
}
assert(sint_route->refcount > 0);
if (--sint_route->refcount) {
return;
}
kvm_irqchip_remove_irqfd_notifier_gsi(kvm_state,
&sint_route->sint_set_notifier,
sint_route->gsi);
kvm_irqchip_release_virq(kvm_state, sint_route->gsi);
if (sint_route->sint_ack_clb) {
event_notifier_set_handler(&sint_route->sint_ack_notifier, NULL);
event_notifier_cleanup(&sint_route->sint_ack_notifier);
}
event_notifier_cleanup(&sint_route->sint_set_notifier);
g_free(sint_route);
}
int hyperv_sint_route_set_sint(HvSintRoute *sint_route)
{
return event_notifier_set(&sint_route->sint_set_notifier);
}
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