1 | /* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR MIT) */ |
2 | /****************************************************************************** |
3 | * evtchn.h |
4 | * |
5 | * Interface to /dev/xen/evtchn. |
6 | * |
7 | * Copyright (c) 2003-2005, K A Fraser |
8 | * |
9 | * This program is free software; you can redistribute it and/or |
10 | * modify it under the terms of the GNU General Public License version 2 |
11 | * as published by the Free Software Foundation; or, when distributed |
12 | * separately from the Linux kernel or incorporated into other |
13 | * software packages, subject to the following license: |
14 | * |
15 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
16 | * of this source file (the "Software"), to deal in the Software without |
17 | * restriction, including without limitation the rights to use, copy, modify, |
18 | * merge, publish, distribute, sublicense, and/or sell copies of the Software, |
19 | * and to permit persons to whom the Software is furnished to do so, subject to |
20 | * the following conditions: |
21 | * |
22 | * The above copyright notice and this permission notice shall be included in |
23 | * all copies or substantial portions of the Software. |
24 | * |
25 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
26 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
27 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
28 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
29 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
30 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
31 | * IN THE SOFTWARE. |
32 | */ |
33 | |
34 | #ifndef __LINUX_PUBLIC_EVTCHN_H__ |
35 | #define __LINUX_PUBLIC_EVTCHN_H__ |
36 | |
37 | /* |
38 | * Bind a fresh port to VIRQ @virq. |
39 | * Return allocated port. |
40 | */ |
41 | #define IOCTL_EVTCHN_BIND_VIRQ \ |
42 | _IOC(_IOC_NONE, 'E', 0, sizeof(struct ioctl_evtchn_bind_virq)) |
43 | struct ioctl_evtchn_bind_virq { |
44 | unsigned int virq; |
45 | }; |
46 | |
47 | /* |
48 | * Bind a fresh port to remote <@remote_domain, @remote_port>. |
49 | * Return allocated port. |
50 | */ |
51 | #define IOCTL_EVTCHN_BIND_INTERDOMAIN \ |
52 | _IOC(_IOC_NONE, 'E', 1, sizeof(struct ioctl_evtchn_bind_interdomain)) |
53 | struct ioctl_evtchn_bind_interdomain { |
54 | unsigned int remote_domain, remote_port; |
55 | }; |
56 | |
57 | /* |
58 | * Allocate a fresh port for binding to @remote_domain. |
59 | * Return allocated port. |
60 | */ |
61 | #define IOCTL_EVTCHN_BIND_UNBOUND_PORT \ |
62 | _IOC(_IOC_NONE, 'E', 2, sizeof(struct ioctl_evtchn_bind_unbound_port)) |
63 | struct ioctl_evtchn_bind_unbound_port { |
64 | unsigned int remote_domain; |
65 | }; |
66 | |
67 | /* |
68 | * Unbind previously allocated @port. |
69 | */ |
70 | #define IOCTL_EVTCHN_UNBIND \ |
71 | _IOC(_IOC_NONE, 'E', 3, sizeof(struct ioctl_evtchn_unbind)) |
72 | struct ioctl_evtchn_unbind { |
73 | unsigned int port; |
74 | }; |
75 | |
76 | /* |
77 | * Unbind previously allocated @port. |
78 | */ |
79 | #define IOCTL_EVTCHN_NOTIFY \ |
80 | _IOC(_IOC_NONE, 'E', 4, sizeof(struct ioctl_evtchn_notify)) |
81 | struct ioctl_evtchn_notify { |
82 | unsigned int port; |
83 | }; |
84 | |
85 | /* Clear and reinitialise the event buffer. Clear error condition. */ |
86 | #define IOCTL_EVTCHN_RESET \ |
87 | _IOC(_IOC_NONE, 'E', 5, 0) |
88 | |
89 | /* |
90 | * Restrict this file descriptor so that it can only be used to bind |
91 | * new interdomain events from one domain. |
92 | * |
93 | * Once a file descriptor has been restricted it cannot be |
94 | * de-restricted, and must be closed and re-opened. Event channels |
95 | * which were bound before restricting remain bound afterwards, and |
96 | * can be notified as usual. |
97 | */ |
98 | #define IOCTL_EVTCHN_RESTRICT_DOMID \ |
99 | _IOC(_IOC_NONE, 'E', 6, sizeof(struct ioctl_evtchn_restrict_domid)) |
100 | struct ioctl_evtchn_restrict_domid { |
101 | domid_t domid; |
102 | }; |
103 | |
104 | /* |
105 | * Bind statically allocated @port. |
106 | */ |
107 | #define IOCTL_EVTCHN_BIND_STATIC \ |
108 | _IOC(_IOC_NONE, 'E', 7, sizeof(struct ioctl_evtchn_bind)) |
109 | struct ioctl_evtchn_bind { |
110 | unsigned int port; |
111 | }; |
112 | |
113 | #endif /* __LINUX_PUBLIC_EVTCHN_H__ */ |
114 | |