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 #endif /* __LINUX_PUBLIC_EVTCHN_H__ */ 105