root/include/uapi/linux/fsl_hypervisor.h

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   1 /* SPDX-License-Identifier: ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) */
   2 /*
   3  * Freescale hypervisor ioctl and kernel interface
   4  *
   5  * Copyright (C) 2008-2011 Freescale Semiconductor, Inc.
   6  * Author: Timur Tabi <timur@freescale.com>
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions are met:
  10  *     * Redistributions of source code must retain the above copyright
  11  *       notice, this list of conditions and the following disclaimer.
  12  *     * Redistributions in binary form must reproduce the above copyright
  13  *       notice, this list of conditions and the following disclaimer in the
  14  *       documentation and/or other materials provided with the distribution.
  15  *     * Neither the name of Freescale Semiconductor nor the
  16  *       names of its contributors may be used to endorse or promote products
  17  *       derived from this software without specific prior written permission.
  18  *
  19  *
  20  * ALTERNATIVELY, this software may be distributed under the terms of the
  21  * GNU General Public License ("GPL") as published by the Free Software
  22  * Foundation, either version 2 of that License or (at your option) any
  23  * later version.
  24  *
  25  * This software is provided by Freescale Semiconductor "as is" and any
  26  * express or implied warranties, including, but not limited to, the implied
  27  * warranties of merchantability and fitness for a particular purpose are
  28  * disclaimed. In no event shall Freescale Semiconductor be liable for any
  29  * direct, indirect, incidental, special, exemplary, or consequential damages
  30  * (including, but not limited to, procurement of substitute goods or services;
  31  * loss of use, data, or profits; or business interruption) however caused and
  32  * on any theory of liability, whether in contract, strict liability, or tort
  33  * (including negligence or otherwise) arising in any way out of the use of this
  34  * software, even if advised of the possibility of such damage.
  35  *
  36  * This file is used by the Freescale hypervisor management driver.  It can
  37  * also be included by applications that need to communicate with the driver
  38  * via the ioctl interface.
  39  */
  40 
  41 #ifndef _UAPIFSL_HYPERVISOR_H
  42 #define _UAPIFSL_HYPERVISOR_H
  43 
  44 #include <linux/types.h>
  45 
  46 /**
  47  * struct fsl_hv_ioctl_restart - restart a partition
  48  * @ret: return error code from the hypervisor
  49  * @partition: the ID of the partition to restart, or -1 for the
  50  *             calling partition
  51  *
  52  * Used by FSL_HV_IOCTL_PARTITION_RESTART
  53  */
  54 struct fsl_hv_ioctl_restart {
  55         __u32 ret;
  56         __u32 partition;
  57 };
  58 
  59 /**
  60  * struct fsl_hv_ioctl_status - get a partition's status
  61  * @ret: return error code from the hypervisor
  62  * @partition: the ID of the partition to query, or -1 for the
  63  *             calling partition
  64  * @status: The returned status of the partition
  65  *
  66  * Used by FSL_HV_IOCTL_PARTITION_GET_STATUS
  67  *
  68  * Values of 'status':
  69  *    0 = Stopped
  70  *    1 = Running
  71  *    2 = Starting
  72  *    3 = Stopping
  73  */
  74 struct fsl_hv_ioctl_status {
  75         __u32 ret;
  76         __u32 partition;
  77         __u32 status;
  78 };
  79 
  80 /**
  81  * struct fsl_hv_ioctl_start - start a partition
  82  * @ret: return error code from the hypervisor
  83  * @partition: the ID of the partition to control
  84  * @entry_point: The offset within the guest IMA to start execution
  85  * @load: If non-zero, reload the partition's images before starting
  86  *
  87  * Used by FSL_HV_IOCTL_PARTITION_START
  88  */
  89 struct fsl_hv_ioctl_start {
  90         __u32 ret;
  91         __u32 partition;
  92         __u32 entry_point;
  93         __u32 load;
  94 };
  95 
  96 /**
  97  * struct fsl_hv_ioctl_stop - stop a partition
  98  * @ret: return error code from the hypervisor
  99  * @partition: the ID of the partition to stop, or -1 for the calling
 100  *             partition
 101  *
 102  * Used by FSL_HV_IOCTL_PARTITION_STOP
 103  */
 104 struct fsl_hv_ioctl_stop {
 105         __u32 ret;
 106         __u32 partition;
 107 };
 108 
 109 /**
 110  * struct fsl_hv_ioctl_memcpy - copy memory between partitions
 111  * @ret: return error code from the hypervisor
 112  * @source: the partition ID of the source partition, or -1 for this
 113  *          partition
 114  * @target: the partition ID of the target partition, or -1 for this
 115  *          partition
 116  * @reserved: reserved, must be set to 0
 117  * @local_addr: user-space virtual address of a buffer in the local
 118  *              partition
 119  * @remote_addr: guest physical address of a buffer in the
 120  *           remote partition
 121  * @count: the number of bytes to copy.  Both the local and remote
 122  *         buffers must be at least 'count' bytes long
 123  *
 124  * Used by FSL_HV_IOCTL_MEMCPY
 125  *
 126  * The 'local' partition is the partition that calls this ioctl.  The
 127  * 'remote' partition is a different partition.  The data is copied from
 128  * the 'source' paritition' to the 'target' partition.
 129  *
 130  * The buffer in the remote partition must be guest physically
 131  * contiguous.
 132  *
 133  * This ioctl does not support copying memory between two remote
 134  * partitions or within the same partition, so either 'source' or
 135  * 'target' (but not both) must be -1.  In other words, either
 136  *
 137  *      source == local and target == remote
 138  * or
 139  *      source == remote and target == local
 140  */
 141 struct fsl_hv_ioctl_memcpy {
 142         __u32 ret;
 143         __u32 source;
 144         __u32 target;
 145         __u32 reserved; /* padding to ensure local_vaddr is aligned */
 146         __u64 local_vaddr;
 147         __u64 remote_paddr;
 148         __u64 count;
 149 };
 150 
 151 /**
 152  * struct fsl_hv_ioctl_doorbell - ring a doorbell
 153  * @ret: return error code from the hypervisor
 154  * @doorbell: the handle of the doorbell to ring doorbell
 155  *
 156  * Used by FSL_HV_IOCTL_DOORBELL
 157  */
 158 struct fsl_hv_ioctl_doorbell {
 159         __u32 ret;
 160         __u32 doorbell;
 161 };
 162 
 163 /**
 164  * struct fsl_hv_ioctl_prop - get/set a device tree property
 165  * @ret: return error code from the hypervisor
 166  * @handle: handle of partition whose tree to access
 167  * @path: virtual address of path name of node to access
 168  * @propname: virtual address of name of property to access
 169  * @propval: virtual address of property data buffer
 170  * @proplen: Size of property data buffer
 171  * @reserved: reserved, must be set to 0
 172  *
 173  * Used by FSL_HV_IOCTL_DOORBELL
 174  */
 175 struct fsl_hv_ioctl_prop {
 176         __u32 ret;
 177         __u32 handle;
 178         __u64 path;
 179         __u64 propname;
 180         __u64 propval;
 181         __u32 proplen;
 182         __u32 reserved; /* padding to ensure structure is aligned */
 183 };
 184 
 185 /* The ioctl type, documented in ioctl-number.txt */
 186 #define FSL_HV_IOCTL_TYPE       0xAF
 187 
 188 /* Restart another partition */
 189 #define FSL_HV_IOCTL_PARTITION_RESTART \
 190         _IOWR(FSL_HV_IOCTL_TYPE, 1, struct fsl_hv_ioctl_restart)
 191 
 192 /* Get a partition's status */
 193 #define FSL_HV_IOCTL_PARTITION_GET_STATUS \
 194         _IOWR(FSL_HV_IOCTL_TYPE, 2, struct fsl_hv_ioctl_status)
 195 
 196 /* Boot another partition */
 197 #define FSL_HV_IOCTL_PARTITION_START \
 198         _IOWR(FSL_HV_IOCTL_TYPE, 3, struct fsl_hv_ioctl_start)
 199 
 200 /* Stop this or another partition */
 201 #define FSL_HV_IOCTL_PARTITION_STOP \
 202         _IOWR(FSL_HV_IOCTL_TYPE, 4, struct fsl_hv_ioctl_stop)
 203 
 204 /* Copy data from one partition to another */
 205 #define FSL_HV_IOCTL_MEMCPY \
 206         _IOWR(FSL_HV_IOCTL_TYPE, 5, struct fsl_hv_ioctl_memcpy)
 207 
 208 /* Ring a doorbell */
 209 #define FSL_HV_IOCTL_DOORBELL \
 210         _IOWR(FSL_HV_IOCTL_TYPE, 6, struct fsl_hv_ioctl_doorbell)
 211 
 212 /* Get a property from another guest's device tree */
 213 #define FSL_HV_IOCTL_GETPROP \
 214         _IOWR(FSL_HV_IOCTL_TYPE, 7, struct fsl_hv_ioctl_prop)
 215 
 216 /* Set a property in another guest's device tree */
 217 #define FSL_HV_IOCTL_SETPROP \
 218         _IOWR(FSL_HV_IOCTL_TYPE, 8, struct fsl_hv_ioctl_prop)
 219 
 220 
 221 #endif /* _UAPIFSL_HYPERVISOR_H */

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