1 /******************************************************************************
4 * Register guest OS callbacks with Xen.
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to
8 * deal in the Software without restriction, including without limitation the
9 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
10 * sell copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
24 * Copyright (c) 2006, Ian Campbell
27 #ifndef __XEN_PUBLIC_CALLBACK_H__
28 #define __XEN_PUBLIC_CALLBACK_H__
33 * Prototype for this hypercall is:
34 * long callback_op(int cmd, void *extra_args)
35 * @cmd == CALLBACKOP_??? (callback operation).
36 * @extra_args == Operation-specific extra arguments (NULL if none).
39 #define CALLBACKTYPE_event 0
40 #define CALLBACKTYPE_failsafe 1
41 #define CALLBACKTYPE_syscall 2 /* x86_64 only */
43 * sysenter is only available on x86_32 with the
44 * supervisor_mode_kernel option enabled.
46 #define CALLBACKTYPE_sysenter 3
47 #define CALLBACKTYPE_nmi 4
50 * Disable event deliver during callback? This flag is ignored for event and
51 * NMI callbacks: event delivery is unconditionally disabled.
53 #define _CALLBACKF_mask_events 0
54 #define CALLBACKF_mask_events (1U << _CALLBACKF_mask_events)
57 * Register a callback.
59 #define CALLBACKOP_register 0
60 struct callback_register {
63 xen_callback_t address;
65 typedef struct callback_register callback_register_t;
66 DEFINE_XEN_GUEST_HANDLE(callback_register_t);
69 * Unregister a callback.
71 * Not all callbacks can be unregistered. -EINVAL will be returned if
72 * you attempt to unregister such a callback.
74 #define CALLBACKOP_unregister 1
75 struct callback_unregister {
79 typedef struct callback_unregister callback_unregister_t;
80 DEFINE_XEN_GUEST_HANDLE(callback_unregister_t);
82 #endif /* __XEN_PUBLIC_CALLBACK_H__ */
90 * indent-tabs-mode: nil