2 * Freescale hypervisor ioctl and kernel interface
4 * Copyright (C) 2008-2011 Freescale Semiconductor, Inc.
5 * Author: Timur Tabi <timur@freescale.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
9 * * Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * * Redistributions in binary form must reproduce the above copyright
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13 * documentation and/or other materials provided with the distribution.
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15 * names of its contributors may be used to endorse or promote products
16 * derived from this software without specific prior written permission.
19 * ALTERNATIVELY, this software may be distributed under the terms of the
20 * GNU General Public License ("GPL") as published by the Free Software
21 * Foundation, either version 2 of that License or (at your option) any
24 * This software is provided by Freescale Semiconductor "as is" and any
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35 * This file is used by the Freescale hypervisor management driver. It can
36 * also be included by applications that need to communicate with the driver
37 * via the ioctl interface.
40 #ifndef FSL_HYPERVISOR_H
41 #define FSL_HYPERVISOR_H
43 #include <linux/types.h>
46 * struct fsl_hv_ioctl_restart - restart a partition
47 * @ret: return error code from the hypervisor
48 * @partition: the ID of the partition to restart, or -1 for the
51 * Used by FSL_HV_IOCTL_PARTITION_RESTART
53 struct fsl_hv_ioctl_restart
{
59 * struct fsl_hv_ioctl_status - get a partition's status
60 * @ret: return error code from the hypervisor
61 * @partition: the ID of the partition to query, or -1 for the
63 * @status: The returned status of the partition
65 * Used by FSL_HV_IOCTL_PARTITION_GET_STATUS
73 struct fsl_hv_ioctl_status
{
80 * struct fsl_hv_ioctl_start - start a partition
81 * @ret: return error code from the hypervisor
82 * @partition: the ID of the partition to control
83 * @entry_point: The offset within the guest IMA to start execution
84 * @load: If non-zero, reload the partition's images before starting
86 * Used by FSL_HV_IOCTL_PARTITION_START
88 struct fsl_hv_ioctl_start
{
96 * struct fsl_hv_ioctl_stop - stop a partition
97 * @ret: return error code from the hypervisor
98 * @partition: the ID of the partition to stop, or -1 for the calling
101 * Used by FSL_HV_IOCTL_PARTITION_STOP
103 struct fsl_hv_ioctl_stop
{
109 * struct fsl_hv_ioctl_memcpy - copy memory between partitions
110 * @ret: return error code from the hypervisor
111 * @source: the partition ID of the source partition, or -1 for this
113 * @target: the partition ID of the target partition, or -1 for this
115 * @reserved: reserved, must be set to 0
116 * @local_addr: user-space virtual address of a buffer in the local
118 * @remote_addr: guest physical address of a buffer in the
120 * @count: the number of bytes to copy. Both the local and remote
121 * buffers must be at least 'count' bytes long
123 * Used by FSL_HV_IOCTL_MEMCPY
125 * The 'local' partition is the partition that calls this ioctl. The
126 * 'remote' partition is a different partition. The data is copied from
127 * the 'source' paritition' to the 'target' partition.
129 * The buffer in the remote partition must be guest physically
132 * This ioctl does not support copying memory between two remote
133 * partitions or within the same partition, so either 'source' or
134 * 'target' (but not both) must be -1. In other words, either
136 * source == local and target == remote
138 * source == remote and target == local
140 struct fsl_hv_ioctl_memcpy
{
144 __u32 reserved
; /* padding to ensure local_vaddr is aligned */
151 * struct fsl_hv_ioctl_doorbell - ring a doorbell
152 * @ret: return error code from the hypervisor
153 * @doorbell: the handle of the doorbell to ring doorbell
155 * Used by FSL_HV_IOCTL_DOORBELL
157 struct fsl_hv_ioctl_doorbell
{
163 * struct fsl_hv_ioctl_prop - get/set a device tree property
164 * @ret: return error code from the hypervisor
165 * @handle: handle of partition whose tree to access
166 * @path: virtual address of path name of node to access
167 * @propname: virtual address of name of property to access
168 * @propval: virtual address of property data buffer
169 * @proplen: Size of property data buffer
170 * @reserved: reserved, must be set to 0
172 * Used by FSL_HV_IOCTL_DOORBELL
174 struct fsl_hv_ioctl_prop
{
181 __u32 reserved
; /* padding to ensure structure is aligned */
184 /* The ioctl type, documented in ioctl-number.txt */
185 #define FSL_HV_IOCTL_TYPE 0xAF
187 /* Restart another partition */
188 #define FSL_HV_IOCTL_PARTITION_RESTART \
189 _IOWR(FSL_HV_IOCTL_TYPE, 1, struct fsl_hv_ioctl_restart)
191 /* Get a partition's status */
192 #define FSL_HV_IOCTL_PARTITION_GET_STATUS \
193 _IOWR(FSL_HV_IOCTL_TYPE, 2, struct fsl_hv_ioctl_status)
195 /* Boot another partition */
196 #define FSL_HV_IOCTL_PARTITION_START \
197 _IOWR(FSL_HV_IOCTL_TYPE, 3, struct fsl_hv_ioctl_start)
199 /* Stop this or another partition */
200 #define FSL_HV_IOCTL_PARTITION_STOP \
201 _IOWR(FSL_HV_IOCTL_TYPE, 4, struct fsl_hv_ioctl_stop)
203 /* Copy data from one partition to another */
204 #define FSL_HV_IOCTL_MEMCPY \
205 _IOWR(FSL_HV_IOCTL_TYPE, 5, struct fsl_hv_ioctl_memcpy)
207 /* Ring a doorbell */
208 #define FSL_HV_IOCTL_DOORBELL \
209 _IOWR(FSL_HV_IOCTL_TYPE, 6, struct fsl_hv_ioctl_doorbell)
211 /* Get a property from another guest's device tree */
212 #define FSL_HV_IOCTL_GETPROP \
213 _IOWR(FSL_HV_IOCTL_TYPE, 7, struct fsl_hv_ioctl_prop)
215 /* Set a property in another guest's device tree */
216 #define FSL_HV_IOCTL_SETPROP \
217 _IOWR(FSL_HV_IOCTL_TYPE, 8, struct fsl_hv_ioctl_prop)
222 * fsl_hv_event_register() - register a callback for failover events
223 * @nb: pointer to caller-supplied notifier_block structure
225 * This function is called by device drivers to register their callback
226 * functions for fail-over events.
228 * The caller should allocate a notifier_block object and initialize the
229 * 'priority' and 'notifier_call' fields.
231 int fsl_hv_failover_register(struct notifier_block
*nb
);
234 * fsl_hv_event_unregister() - unregister a callback for failover events
235 * @nb: the same 'nb' used in previous fsl_hv_failover_register call
237 int fsl_hv_failover_unregister(struct notifier_block
*nb
);
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