1 /* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR MIT) */
2 /******************************************************************************
3 * privcmd.h
4 *
5 * Interface to /proc/xen/privcmd.
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_PRIVCMD_H__
35 #define __LINUX_PUBLIC_PRIVCMD_H__
36
37 #include <linux/types.h>
38 #include <linux/compiler.h>
39 #include <xen/interface/xen.h>
40
41 struct privcmd_hypercall {
42 __u64 op;
43 __u64 arg[5];
44 };
45
46 struct privcmd_mmap_entry {
47 __u64 va;
48 /*
49 * This should be a GFN. It's not possible to change the name because
50 * it's exposed to the user-space.
51 */
52 __u64 mfn;
53 __u64 npages;
54 };
55
56 struct privcmd_mmap {
57 int num;
58 domid_t dom; /* target domain */
59 struct privcmd_mmap_entry __user *entry;
60 };
61
62 struct privcmd_mmapbatch {
63 int num; /* number of pages to populate */
64 domid_t dom; /* target domain */
65 __u64 addr; /* virtual address */
66 xen_pfn_t __user *arr; /* array of mfns - or'd with
67 PRIVCMD_MMAPBATCH_*_ERROR on err */
68 };
69
70 #define PRIVCMD_MMAPBATCH_MFN_ERROR 0xf0000000U
71 #define PRIVCMD_MMAPBATCH_PAGED_ERROR 0x80000000U
72
73 struct privcmd_mmapbatch_v2 {
74 unsigned int num; /* number of pages to populate */
75 domid_t dom; /* target domain */
76 __u64 addr; /* virtual address */
77 const xen_pfn_t __user *arr; /* array of mfns */
78 int __user *err; /* array of error codes */
79 };
80
81 struct privcmd_dm_op_buf {
82 void __user *uptr;
83 size_t size;
84 };
85
86 struct privcmd_dm_op {
87 domid_t dom;
88 __u16 num;
89 const struct privcmd_dm_op_buf __user *ubufs;
90 };
91
92 struct privcmd_mmap_resource {
93 domid_t dom;
94 __u32 type;
95 __u32 id;
96 __u32 idx;
97 __u64 num;
98 __u64 addr;
99 };
100
101 /*
102 * @cmd: IOCTL_PRIVCMD_HYPERCALL
103 * @arg: &privcmd_hypercall_t
104 * Return: Value returned from execution of the specified hypercall.
105 *
106 * @cmd: IOCTL_PRIVCMD_MMAPBATCH_V2
107 * @arg: &struct privcmd_mmapbatch_v2
108 * Return: 0 on success (i.e., arg->err contains valid error codes for
109 * each frame). On an error other than a failed frame remap, -1 is
110 * returned and errno is set to EINVAL, EFAULT etc. As an exception,
111 * if the operation was otherwise successful but any frame failed with
112 * -ENOENT, then -1 is returned and errno is set to ENOENT.
113 */
114 #define IOCTL_PRIVCMD_HYPERCALL \
115 _IOC(_IOC_NONE, 'P', 0, sizeof(struct privcmd_hypercall))
116 #define IOCTL_PRIVCMD_MMAP \
117 _IOC(_IOC_NONE, 'P', 2, sizeof(struct privcmd_mmap))
118 #define IOCTL_PRIVCMD_MMAPBATCH \
119 _IOC(_IOC_NONE, 'P', 3, sizeof(struct privcmd_mmapbatch))
120 #define IOCTL_PRIVCMD_MMAPBATCH_V2 \
121 _IOC(_IOC_NONE, 'P', 4, sizeof(struct privcmd_mmapbatch_v2))
122 #define IOCTL_PRIVCMD_DM_OP \
123 _IOC(_IOC_NONE, 'P', 5, sizeof(struct privcmd_dm_op))
124 #define IOCTL_PRIVCMD_RESTRICT \
125 _IOC(_IOC_NONE, 'P', 6, sizeof(domid_t))
126 #define IOCTL_PRIVCMD_MMAP_RESOURCE \
127 _IOC(_IOC_NONE, 'P', 7, sizeof(struct privcmd_mmap_resource))
128
129 #endif /* __LINUX_PUBLIC_PRIVCMD_H__ */