242 lines
7.7 KiB
C
242 lines
7.7 KiB
C
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/*
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* Freescale hypervisor ioctl and kernel interface
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*
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* Copyright (C) 2008-2011 Freescale Semiconductor, Inc.
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* Author: Timur Tabi <timur@freescale.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of Freescale Semiconductor nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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*
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* ALTERNATIVELY, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") as published by the Free Software
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* Foundation, either version 2 of that License or (at your option) any
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* later version.
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*
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* This software is provided by Freescale Semiconductor "as is" and any
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* express or implied warranties, including, but not limited to, the implied
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* warranties of merchantability and fitness for a particular purpose are
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* disclaimed. In no event shall Freescale Semiconductor be liable for any
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* direct, indirect, incidental, special, exemplary, or consequential damages
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* (including, but not limited to, procurement of substitute goods or services;
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* loss of use, data, or profits; or business interruption) however caused and
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* on any theory of liability, whether in contract, strict liability, or tort
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* (including negligence or otherwise) arising in any way out of the use of this
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* software, even if advised of the possibility of such damage.
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*
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* This file is used by the Freescale hypervisor management driver. It can
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* also be included by applications that need to communicate with the driver
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* via the ioctl interface.
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*/
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#ifndef FSL_HYPERVISOR_H
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#define FSL_HYPERVISOR_H
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#include <linux/types.h>
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/**
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* struct fsl_hv_ioctl_restart - restart a partition
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* @ret: return error code from the hypervisor
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* @partition: the ID of the partition to restart, or -1 for the
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* calling partition
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*
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* Used by FSL_HV_IOCTL_PARTITION_RESTART
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*/
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struct fsl_hv_ioctl_restart {
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__u32 ret;
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__u32 partition;
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};
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/**
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* struct fsl_hv_ioctl_status - get a partition's status
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* @ret: return error code from the hypervisor
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* @partition: the ID of the partition to query, or -1 for the
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* calling partition
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* @status: The returned status of the partition
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*
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* Used by FSL_HV_IOCTL_PARTITION_GET_STATUS
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*
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* Values of 'status':
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* 0 = Stopped
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* 1 = Running
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* 2 = Starting
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* 3 = Stopping
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*/
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struct fsl_hv_ioctl_status {
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__u32 ret;
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__u32 partition;
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__u32 status;
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};
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/**
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* struct fsl_hv_ioctl_start - start a partition
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* @ret: return error code from the hypervisor
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* @partition: the ID of the partition to control
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* @entry_point: The offset within the guest IMA to start execution
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* @load: If non-zero, reload the partition's images before starting
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*
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* Used by FSL_HV_IOCTL_PARTITION_START
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*/
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struct fsl_hv_ioctl_start {
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__u32 ret;
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__u32 partition;
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__u32 entry_point;
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__u32 load;
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};
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/**
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* struct fsl_hv_ioctl_stop - stop a partition
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* @ret: return error code from the hypervisor
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* @partition: the ID of the partition to stop, or -1 for the calling
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* partition
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*
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* Used by FSL_HV_IOCTL_PARTITION_STOP
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*/
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struct fsl_hv_ioctl_stop {
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__u32 ret;
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__u32 partition;
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};
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/**
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* struct fsl_hv_ioctl_memcpy - copy memory between partitions
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* @ret: return error code from the hypervisor
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* @source: the partition ID of the source partition, or -1 for this
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* partition
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* @target: the partition ID of the target partition, or -1 for this
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* partition
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* @reserved: reserved, must be set to 0
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* @local_addr: user-space virtual address of a buffer in the local
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* partition
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* @remote_addr: guest physical address of a buffer in the
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* remote partition
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* @count: the number of bytes to copy. Both the local and remote
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* buffers must be at least 'count' bytes long
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*
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* Used by FSL_HV_IOCTL_MEMCPY
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*
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* The 'local' partition is the partition that calls this ioctl. The
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* 'remote' partition is a different partition. The data is copied from
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* the 'source' paritition' to the 'target' partition.
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*
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* The buffer in the remote partition must be guest physically
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* contiguous.
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*
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* This ioctl does not support copying memory between two remote
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* partitions or within the same partition, so either 'source' or
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* 'target' (but not both) must be -1. In other words, either
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*
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* source == local and target == remote
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* or
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* source == remote and target == local
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*/
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struct fsl_hv_ioctl_memcpy {
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__u32 ret;
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__u32 source;
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__u32 target;
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__u32 reserved; /* padding to ensure local_vaddr is aligned */
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__u64 local_vaddr;
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__u64 remote_paddr;
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__u64 count;
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};
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/**
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* struct fsl_hv_ioctl_doorbell - ring a doorbell
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* @ret: return error code from the hypervisor
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* @doorbell: the handle of the doorbell to ring doorbell
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*
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* Used by FSL_HV_IOCTL_DOORBELL
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*/
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struct fsl_hv_ioctl_doorbell {
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__u32 ret;
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__u32 doorbell;
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};
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/**
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* struct fsl_hv_ioctl_prop - get/set a device tree property
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* @ret: return error code from the hypervisor
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* @handle: handle of partition whose tree to access
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* @path: virtual address of path name of node to access
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* @propname: virtual address of name of property to access
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* @propval: virtual address of property data buffer
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* @proplen: Size of property data buffer
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* @reserved: reserved, must be set to 0
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*
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* Used by FSL_HV_IOCTL_DOORBELL
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*/
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struct fsl_hv_ioctl_prop {
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__u32 ret;
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__u32 handle;
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__u64 path;
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__u64 propname;
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__u64 propval;
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__u32 proplen;
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__u32 reserved; /* padding to ensure structure is aligned */
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};
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/* The ioctl type, documented in ioctl-number.txt */
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#define FSL_HV_IOCTL_TYPE 0xAF
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/* Restart another partition */
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#define FSL_HV_IOCTL_PARTITION_RESTART \
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_IOWR(FSL_HV_IOCTL_TYPE, 1, struct fsl_hv_ioctl_restart)
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/* Get a partition's status */
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#define FSL_HV_IOCTL_PARTITION_GET_STATUS \
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_IOWR(FSL_HV_IOCTL_TYPE, 2, struct fsl_hv_ioctl_status)
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/* Boot another partition */
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#define FSL_HV_IOCTL_PARTITION_START \
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_IOWR(FSL_HV_IOCTL_TYPE, 3, struct fsl_hv_ioctl_start)
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/* Stop this or another partition */
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#define FSL_HV_IOCTL_PARTITION_STOP \
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_IOWR(FSL_HV_IOCTL_TYPE, 4, struct fsl_hv_ioctl_stop)
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/* Copy data from one partition to another */
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#define FSL_HV_IOCTL_MEMCPY \
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_IOWR(FSL_HV_IOCTL_TYPE, 5, struct fsl_hv_ioctl_memcpy)
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/* Ring a doorbell */
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#define FSL_HV_IOCTL_DOORBELL \
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_IOWR(FSL_HV_IOCTL_TYPE, 6, struct fsl_hv_ioctl_doorbell)
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/* Get a property from another guest's device tree */
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#define FSL_HV_IOCTL_GETPROP \
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_IOWR(FSL_HV_IOCTL_TYPE, 7, struct fsl_hv_ioctl_prop)
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/* Set a property in another guest's device tree */
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#define FSL_HV_IOCTL_SETPROP \
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_IOWR(FSL_HV_IOCTL_TYPE, 8, struct fsl_hv_ioctl_prop)
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#ifdef __KERNEL__
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/**
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* fsl_hv_event_register() - register a callback for failover events
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* @nb: pointer to caller-supplied notifier_block structure
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*
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* This function is called by device drivers to register their callback
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* functions for fail-over events.
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*
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* The caller should allocate a notifier_block object and initialize the
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* 'priority' and 'notifier_call' fields.
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*/
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int fsl_hv_failover_register(struct notifier_block *nb);
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/**
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* fsl_hv_event_unregister() - unregister a callback for failover events
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* @nb: the same 'nb' used in previous fsl_hv_failover_register call
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*/
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int fsl_hv_failover_unregister(struct notifier_block *nb);
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#endif
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#endif
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