include/uapi/xen/privcmd.h

   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 /* For privcmd_irqfd::flags */
 102 #define PRIVCMD_IRQFD_FLAG_DEASSIGN (1 << 0)
 103
 104 struct privcmd_irqfd {
 105         __u64 dm_op;
 106         __u32 size; /* Size of structure pointed by dm_op */
 107         __u32 fd;
 108         __u32 flags;
 109         domid_t dom;
 110         __u8 pad[2];
 111 };
 112
 113 /* For privcmd_ioeventfd::flags */
 114 #define PRIVCMD_IOEVENTFD_FLAG_DEASSIGN (1 << 0)
 115
 116 struct privcmd_ioeventfd {
 117         __u64 ioreq;
 118         __u64 ports;
 119         __u64 addr;
 120         __u32 addr_len;
 121         __u32 event_fd;
 122         __u32 vcpus;
 123         __u32 vq;
 124         __u32 flags;
 125         domid_t dom;
 126         __u8 pad[2];
 127 };
 128
 129 struct privcmd_pcidev_get_gsi {
 130         __u32 sbdf;
 131         __u32 gsi;
 132 };
 133
 134 /*
 135  * @cmd: IOCTL_PRIVCMD_HYPERCALL
 136  * @arg: &privcmd_hypercall_t
 137  * Return: Value returned from execution of the specified hypercall.
 138  *
 139  * @cmd: IOCTL_PRIVCMD_MMAPBATCH_V2
 140  * @arg: &struct privcmd_mmapbatch_v2
 141  * Return: 0 on success (i.e., arg->err contains valid error codes for
 142  * each frame).  On an error other than a failed frame remap, -1 is
 143  * returned and errno is set to EINVAL, EFAULT etc.  As an exception,
 144  * if the operation was otherwise successful but any frame failed with
 145  * -ENOENT, then -1 is returned and errno is set to ENOENT.
 146  */
 147 #define IOCTL_PRIVCMD_HYPERCALL                                 \
 148         _IOC(_IOC_NONE, 'P', 0, sizeof(struct privcmd_hypercall))
 149 #define IOCTL_PRIVCMD_MMAP                                      \
 150         _IOC(_IOC_NONE, 'P', 2, sizeof(struct privcmd_mmap))
 151 #define IOCTL_PRIVCMD_MMAPBATCH                                 \
 152         _IOC(_IOC_NONE, 'P', 3, sizeof(struct privcmd_mmapbatch))
 153 #define IOCTL_PRIVCMD_MMAPBATCH_V2                              \
 154         _IOC(_IOC_NONE, 'P', 4, sizeof(struct privcmd_mmapbatch_v2))
 155 #define IOCTL_PRIVCMD_DM_OP                                     \
 156         _IOC(_IOC_NONE, 'P', 5, sizeof(struct privcmd_dm_op))
 157 #define IOCTL_PRIVCMD_RESTRICT                                  \
 158         _IOC(_IOC_NONE, 'P', 6, sizeof(domid_t))
 159 #define IOCTL_PRIVCMD_MMAP_RESOURCE                             \
 160         _IOC(_IOC_NONE, 'P', 7, sizeof(struct privcmd_mmap_resource))
 161 #define IOCTL_PRIVCMD_IRQFD                                     \
 162         _IOW('P', 8, struct privcmd_irqfd)
 163 #define IOCTL_PRIVCMD_IOEVENTFD                                 \
 164         _IOW('P', 9, struct privcmd_ioeventfd)
 165 #define IOCTL_PRIVCMD_PCIDEV_GET_GSI                            \
 166         _IOC(_IOC_NONE, 'P', 10, sizeof(struct privcmd_pcidev_get_gsi))
 167
 168 #endif /* __LINUX_PUBLIC_PRIVCMD_H__ */