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
41struct privcmd_hypercall {
42	__u64 op;
43	__u64 arg[5];
44};
45
46struct 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
56struct privcmd_mmap {
57	int num;
58	domid_t dom; /* target domain */
59	struct privcmd_mmap_entry __user *entry;
60};
61
62struct 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
73struct 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
81struct privcmd_dm_op_buf {
82	void __user *uptr;
83	size_t size;
84};
85
86struct privcmd_dm_op {
87	domid_t dom;
88	__u16 num;
89	const struct privcmd_dm_op_buf __user *ubufs;
90};
91
92struct 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__ */
130