1/*
2 * Hyper-V guest/hypervisor interaction
3 *
4 * Copyright (c) 2015-2018 Virtuozzo International GmbH.
5 *
6 * This work is licensed under the terms of the GNU GPL, version 2 or later.
7 * See the COPYING file in the top-level directory.
8 */
9
10#ifndef HW_HYPERV_HYPERV_H
11#define HW_HYPERV_HYPERV_H
12
13#include "cpu-qom.h"
14#include "hw/hyperv/hyperv-proto.h"
15
16typedef struct HvSintRoute HvSintRoute;
17
18/*
19 * Callback executed in a bottom-half when the status of posting the message
20 * becomes known, before unblocking the connection for further messages
21 */
22typedef void (*HvSintMsgCb)(void *data, int status);
23
24HvSintRoute *hyperv_sint_route_new(uint32_t vp_index, uint32_t sint,
25 HvSintMsgCb cb, void *cb_data);
26void hyperv_sint_route_ref(HvSintRoute *sint_route);
27void hyperv_sint_route_unref(HvSintRoute *sint_route);
28
29int hyperv_sint_route_set_sint(HvSintRoute *sint_route);
30
31/*
32 * Submit a message to be posted in vcpu context. If the submission succeeds,
33 * the status of posting the message is reported via the callback associated
34 * with the @sint_route; until then no more messages are accepted.
35 */
36int hyperv_post_msg(HvSintRoute *sint_route, struct hyperv_message *msg);
37/*
38 * Set event flag @eventno, and signal the SINT if the flag has changed.
39 */
40int hyperv_set_event_flag(HvSintRoute *sint_route, unsigned eventno);
41
42/*
43 * Handler for messages arriving from the guest via HV_POST_MESSAGE hypercall.
44 * Executed in vcpu context.
45 */
46typedef uint16_t (*HvMsgHandler)(const struct hyperv_post_message_input *msg,
47 void *data);
48/*
49 * Associate @handler with the message connection @conn_id, such that @handler
50 * is called with @data when the guest executes HV_POST_MESSAGE hypercall on
51 * @conn_id. If @handler is NULL clear the association.
52 */
53int hyperv_set_msg_handler(uint32_t conn_id, HvMsgHandler handler, void *data);
54/*
55 * Associate @notifier with the event connection @conn_id, such that @notifier
56 * is signaled when the guest executes HV_SIGNAL_EVENT hypercall on @conn_id.
57 * If @notifier is NULL clear the association.
58 */
59int hyperv_set_event_flag_handler(uint32_t conn_id, EventNotifier *notifier);
60
61/*
62 * Process HV_POST_MESSAGE hypercall: parse the data in the guest memory as
63 * specified in @param, and call the HvMsgHandler associated with the
64 * connection on the message contained therein.
65 */
66uint16_t hyperv_hcall_post_message(uint64_t param, bool fast);
67/*
68 * Process HV_SIGNAL_EVENT hypercall: signal the EventNotifier associated with
69 * the connection as specified in @param.
70 */
71uint16_t hyperv_hcall_signal_event(uint64_t param, bool fast);
72
73static inline uint32_t hyperv_vp_index(CPUState *cs)
74{
75 return cs->cpu_index;
76}
77
78void hyperv_synic_add(CPUState *cs);
79void hyperv_synic_reset(CPUState *cs);
80void hyperv_synic_update(CPUState *cs, bool enable,
81 hwaddr msg_page_addr, hwaddr event_page_addr);
82
83#endif
84