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 /*
  93  * @cmd: IOCTL_PRIVCMD_HYPERCALL
  94  * @arg: &privcmd_hypercall_t
  95  * Return: Value returned from execution of the specified hypercall.
  96  *
  97  * @cmd: IOCTL_PRIVCMD_MMAPBATCH_V2
  98  * @arg: &struct privcmd_mmapbatch_v2
  99  * Return: 0 on success (i.e., arg->err contains valid error codes for
 100  * each frame).  On an error other than a failed frame remap, -1 is
 101  * returned and errno is set to EINVAL, EFAULT etc.  As an exception,
 102  * if the operation was otherwise successful but any frame failed with
 103  * -ENOENT, then -1 is returned and errno is set to ENOENT.
 104  */
 105 #define IOCTL_PRIVCMD_HYPERCALL                                 \
 106         _IOC(_IOC_NONE, 'P', 0, sizeof(struct privcmd_hypercall))
 107 #define IOCTL_PRIVCMD_MMAP                                      \
 108         _IOC(_IOC_NONE, 'P', 2, sizeof(struct privcmd_mmap))
 109 #define IOCTL_PRIVCMD_MMAPBATCH                                 \
 110         _IOC(_IOC_NONE, 'P', 3, sizeof(struct privcmd_mmapbatch))
 111 #define IOCTL_PRIVCMD_MMAPBATCH_V2                              \
 112         _IOC(_IOC_NONE, 'P', 4, sizeof(struct privcmd_mmapbatch_v2))
 113 #define IOCTL_PRIVCMD_DM_OP                                     \
 114         _IOC(_IOC_NONE, 'P', 5, sizeof(struct privcmd_dm_op))
 115 #define IOCTL_PRIVCMD_RESTRICT                                  \
 116         _IOC(_IOC_NONE, 'P', 6, sizeof(domid_t))
 117
 118 #endif /* __LINUX_PUBLIC_PRIVCMD_H__ */