qemu-e2k/hw/hyperv/hyperv_testdev.c

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/*
* QEMU KVM Hyper-V test device to support Hyper-V kvm-unit-tests
*
* Copyright (C) 2015 Andrey Smetanin <asmetanin@virtuozzo.com>
*
* Authors:
* Andrey Smetanin <asmetanin@virtuozzo.com>
*
* 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 "qemu/module.h"
#include "qemu/queue.h"
#include "hw/isa/isa.h"
#include "hw/hyperv/hyperv.h"
typedef struct TestSintRoute {
QLIST_ENTRY(TestSintRoute) le;
uint8_t vp_index;
uint8_t sint;
HvSintRoute *sint_route;
} TestSintRoute;
typedef struct TestMsgConn {
QLIST_ENTRY(TestMsgConn) le;
uint8_t conn_id;
HvSintRoute *sint_route;
struct hyperv_message msg;
} TestMsgConn;
typedef struct TestEvtConn {
QLIST_ENTRY(TestEvtConn) le;
uint8_t conn_id;
HvSintRoute *sint_route;
EventNotifier notifier;
} TestEvtConn;
struct HypervTestDev {
ISADevice parent_obj;
MemoryRegion sint_control;
QLIST_HEAD(, TestSintRoute) sint_routes;
QLIST_HEAD(, TestMsgConn) msg_conns;
QLIST_HEAD(, TestEvtConn) evt_conns;
};
typedef struct HypervTestDev HypervTestDev;
#define TYPE_HYPERV_TEST_DEV "hyperv-testdev"
#define HYPERV_TEST_DEV(obj) \
OBJECT_CHECK(HypervTestDev, (obj), TYPE_HYPERV_TEST_DEV)
enum {
HV_TEST_DEV_SINT_ROUTE_CREATE = 1,
HV_TEST_DEV_SINT_ROUTE_DESTROY,
HV_TEST_DEV_SINT_ROUTE_SET_SINT,
HV_TEST_DEV_MSG_CONN_CREATE,
HV_TEST_DEV_MSG_CONN_DESTROY,
HV_TEST_DEV_EVT_CONN_CREATE,
HV_TEST_DEV_EVT_CONN_DESTROY,
};
static void sint_route_create(HypervTestDev *dev,
uint8_t vp_index, uint8_t sint)
{
TestSintRoute *sint_route;
sint_route = g_new0(TestSintRoute, 1);
assert(sint_route);
sint_route->vp_index = vp_index;
sint_route->sint = sint;
sint_route->sint_route = hyperv_sint_route_new(vp_index, sint, NULL, NULL);
assert(sint_route->sint_route);
QLIST_INSERT_HEAD(&dev->sint_routes, sint_route, le);
}
static TestSintRoute *sint_route_find(HypervTestDev *dev,
uint8_t vp_index, uint8_t sint)
{
TestSintRoute *sint_route;
QLIST_FOREACH(sint_route, &dev->sint_routes, le) {
if (sint_route->vp_index == vp_index && sint_route->sint == sint) {
return sint_route;
}
}
assert(false);
return NULL;
}
static void sint_route_destroy(HypervTestDev *dev,
uint8_t vp_index, uint8_t sint)
{
TestSintRoute *sint_route;
sint_route = sint_route_find(dev, vp_index, sint);
QLIST_REMOVE(sint_route, le);
hyperv_sint_route_unref(sint_route->sint_route);
g_free(sint_route);
}
static void sint_route_set_sint(HypervTestDev *dev,
uint8_t vp_index, uint8_t sint)
{
TestSintRoute *sint_route;
sint_route = sint_route_find(dev, vp_index, sint);
hyperv_sint_route_set_sint(sint_route->sint_route);
}
static void msg_retry(void *opaque)
{
TestMsgConn *conn = opaque;
assert(!hyperv_post_msg(conn->sint_route, &conn->msg));
}
static void msg_cb(void *data, int status)
{
TestMsgConn *conn = data;
if (!status) {
return;
}
assert(status == -EAGAIN);
aio_bh_schedule_oneshot(qemu_get_aio_context(), msg_retry, conn);
}
static uint16_t msg_handler(const struct hyperv_post_message_input *msg,
void *data)
{
int ret;
TestMsgConn *conn = data;
/* post the same message we've got */
conn->msg.header.message_type = msg->message_type;
assert(msg->payload_size < sizeof(conn->msg.payload));
conn->msg.header.payload_size = msg->payload_size;
memcpy(&conn->msg.payload, msg->payload, msg->payload_size);
ret = hyperv_post_msg(conn->sint_route, &conn->msg);
switch (ret) {
case 0:
return HV_STATUS_SUCCESS;
case -EAGAIN:
return HV_STATUS_INSUFFICIENT_BUFFERS;
default:
return HV_STATUS_INVALID_HYPERCALL_INPUT;
}
}
static void msg_conn_create(HypervTestDev *dev, uint8_t vp_index,
uint8_t sint, uint8_t conn_id)
{
TestMsgConn *conn;
conn = g_new0(TestMsgConn, 1);
assert(conn);
conn->conn_id = conn_id;
conn->sint_route = hyperv_sint_route_new(vp_index, sint, msg_cb, conn);
assert(conn->sint_route);
assert(!hyperv_set_msg_handler(conn->conn_id, msg_handler, conn));
QLIST_INSERT_HEAD(&dev->msg_conns, conn, le);
}
static void msg_conn_destroy(HypervTestDev *dev, uint8_t conn_id)
{
TestMsgConn *conn;
QLIST_FOREACH(conn, &dev->msg_conns, le) {
if (conn->conn_id == conn_id) {
QLIST_REMOVE(conn, le);
hyperv_set_msg_handler(conn->conn_id, NULL, NULL);
hyperv_sint_route_unref(conn->sint_route);
g_free(conn);
return;
}
}
assert(false);
}
static void evt_conn_handler(EventNotifier *notifier)
{
TestEvtConn *conn = container_of(notifier, TestEvtConn, notifier);
event_notifier_test_and_clear(notifier);
/* signal the same event flag we've got */
assert(!hyperv_set_event_flag(conn->sint_route, conn->conn_id));
}
static void evt_conn_create(HypervTestDev *dev, uint8_t vp_index,
uint8_t sint, uint8_t conn_id)
{
TestEvtConn *conn;
conn = g_new0(TestEvtConn, 1);
assert(conn);
conn->conn_id = conn_id;
conn->sint_route = hyperv_sint_route_new(vp_index, sint, NULL, NULL);
assert(conn->sint_route);
assert(!event_notifier_init(&conn->notifier, false));
event_notifier_set_handler(&conn->notifier, evt_conn_handler);
assert(!hyperv_set_event_flag_handler(conn_id, &conn->notifier));
QLIST_INSERT_HEAD(&dev->evt_conns, conn, le);
}
static void evt_conn_destroy(HypervTestDev *dev, uint8_t conn_id)
{
TestEvtConn *conn;
QLIST_FOREACH(conn, &dev->evt_conns, le) {
if (conn->conn_id == conn_id) {
QLIST_REMOVE(conn, le);
hyperv_set_event_flag_handler(conn->conn_id, NULL);
event_notifier_set_handler(&conn->notifier, NULL);
event_notifier_cleanup(&conn->notifier);
hyperv_sint_route_unref(conn->sint_route);
g_free(conn);
return;
}
}
assert(false);
}
static uint64_t hv_test_dev_read(void *opaque, hwaddr addr, unsigned size)
{
return 0;
}
static void hv_test_dev_write(void *opaque, hwaddr addr, uint64_t data,
uint32_t len)
{
HypervTestDev *dev = HYPERV_TEST_DEV(opaque);
uint8_t sint = data & 0xFF;
uint8_t vp_index = (data >> 8ULL) & 0xFF;
uint8_t ctl = (data >> 16ULL) & 0xFF;
uint8_t conn_id = (data >> 24ULL) & 0xFF;
switch (ctl) {
case HV_TEST_DEV_SINT_ROUTE_CREATE:
sint_route_create(dev, vp_index, sint);
break;
case HV_TEST_DEV_SINT_ROUTE_DESTROY:
sint_route_destroy(dev, vp_index, sint);
break;
case HV_TEST_DEV_SINT_ROUTE_SET_SINT:
sint_route_set_sint(dev, vp_index, sint);
break;
case HV_TEST_DEV_MSG_CONN_CREATE:
msg_conn_create(dev, vp_index, sint, conn_id);
break;
case HV_TEST_DEV_MSG_CONN_DESTROY:
msg_conn_destroy(dev, conn_id);
break;
case HV_TEST_DEV_EVT_CONN_CREATE:
evt_conn_create(dev, vp_index, sint, conn_id);
break;
case HV_TEST_DEV_EVT_CONN_DESTROY:
evt_conn_destroy(dev, conn_id);
break;
default:
break;
}
}
static const MemoryRegionOps synic_test_sint_ops = {
.read = hv_test_dev_read,
.write = hv_test_dev_write,
.valid.min_access_size = 4,
.valid.max_access_size = 4,
.endianness = DEVICE_LITTLE_ENDIAN,
};
static void hv_test_dev_realizefn(DeviceState *d, Error **errp)
{
ISADevice *isa = ISA_DEVICE(d);
HypervTestDev *dev = HYPERV_TEST_DEV(d);
MemoryRegion *io = isa_address_space_io(isa);
QLIST_INIT(&dev->sint_routes);
QLIST_INIT(&dev->msg_conns);
QLIST_INIT(&dev->evt_conns);
memory_region_init_io(&dev->sint_control, OBJECT(dev),
&synic_test_sint_ops, dev,
"hyperv-testdev-ctl", 4);
memory_region_add_subregion(io, 0x3000, &dev->sint_control);
}
static void hv_test_dev_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
set_bit(DEVICE_CATEGORY_MISC, dc->categories);
dc->realize = hv_test_dev_realizefn;
}
static const TypeInfo hv_test_dev_info = {
.name = TYPE_HYPERV_TEST_DEV,
.parent = TYPE_ISA_DEVICE,
.instance_size = sizeof(HypervTestDev),
.class_init = hv_test_dev_class_init,
};
static void hv_test_dev_register_types(void)
{
type_register_static(&hv_test_dev_info);
}
type_init(hv_test_dev_register_types);