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Diffstat (limited to 'include/linux/fsl_hypervisor.h')
| -rw-r--r-- | include/linux/fsl_hypervisor.h | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/include/linux/fsl_hypervisor.h b/include/linux/fsl_hypervisor.h new file mode 100644 index 000000000000..1cebaeeeef57 --- /dev/null +++ b/include/linux/fsl_hypervisor.h @@ -0,0 +1,241 @@ +/* + * Freescale hypervisor ioctl and kernel interface + * + * Copyright (C) 2008-2011 Freescale Semiconductor, Inc. + * Author: Timur Tabi <timur@freescale.com> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of Freescale Semiconductor nor the + * names of its contributors may be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * + * ALTERNATIVELY, this software may be distributed under the terms of the + * GNU General Public License ("GPL") as published by the Free Software + * Foundation, either version 2 of that License or (at your option) any + * later version. + * + * This software is provided by Freescale Semiconductor "as is" and any + * express or implied warranties, including, but not limited to, the implied + * warranties of merchantability and fitness for a particular purpose are + * disclaimed. In no event shall Freescale Semiconductor be liable for any + * direct, indirect, incidental, special, exemplary, or consequential damages + * (including, but not limited to, procurement of substitute goods or services; + * loss of use, data, or profits; or business interruption) however caused and + * on any theory of liability, whether in contract, strict liability, or tort + * (including negligence or otherwise) arising in any way out of the use of this + * software, even if advised of the possibility of such damage. + * + * This file is used by the Freescale hypervisor management driver. It can + * also be included by applications that need to communicate with the driver + * via the ioctl interface. + */ + +#ifndef FSL_HYPERVISOR_H +#define FSL_HYPERVISOR_H + +#include <linux/types.h> + +/** + * struct fsl_hv_ioctl_restart - restart a partition + * @ret: return error code from the hypervisor + * @partition: the ID of the partition to restart, or -1 for the + * calling partition + * + * Used by FSL_HV_IOCTL_PARTITION_RESTART + */ +struct fsl_hv_ioctl_restart { + __u32 ret; + __u32 partition; +}; + +/** + * struct fsl_hv_ioctl_status - get a partition's status + * @ret: return error code from the hypervisor + * @partition: the ID of the partition to query, or -1 for the + * calling partition + * @status: The returned status of the partition + * + * Used by FSL_HV_IOCTL_PARTITION_GET_STATUS + * + * Values of 'status': + * 0 = Stopped + * 1 = Running + * 2 = Starting + * 3 = Stopping + */ +struct fsl_hv_ioctl_status { + __u32 ret; + __u32 partition; + __u32 status; +}; + +/** + * struct fsl_hv_ioctl_start - start a partition + * @ret: return error code from the hypervisor + * @partition: the ID of the partition to control + * @entry_point: The offset within the guest IMA to start execution + * @load: If non-zero, reload the partition's images before starting + * + * Used by FSL_HV_IOCTL_PARTITION_START + */ +struct fsl_hv_ioctl_start { + __u32 ret; + __u32 partition; + __u32 entry_point; + __u32 load; +}; + +/** + * struct fsl_hv_ioctl_stop - stop a partition + * @ret: return error code from the hypervisor + * @partition: the ID of the partition to stop, or -1 for the calling + * partition + * + * Used by FSL_HV_IOCTL_PARTITION_STOP + */ +struct fsl_hv_ioctl_stop { + __u32 ret; + __u32 partition; +}; + +/** + * struct fsl_hv_ioctl_memcpy - copy memory between partitions + * @ret: return error code from the hypervisor + * @source: the partition ID of the source partition, or -1 for this + * partition + * @target: the partition ID of the target partition, or -1 for this + * partition + * @reserved: reserved, must be set to 0 + * @local_addr: user-space virtual address of a buffer in the local + * partition + * @remote_addr: guest physical address of a buffer in the + * remote partition + * @count: the number of bytes to copy. Both the local and remote + * buffers must be at least 'count' bytes long + * + * Used by FSL_HV_IOCTL_MEMCPY + * + * The 'local' partition is the partition that calls this ioctl. The + * 'remote' partition is a different partition. The data is copied from + * the 'source' paritition' to the 'target' partition. + * + * The buffer in the remote partition must be guest physically + * contiguous. + * + * This ioctl does not support copying memory between two remote + * partitions or within the same partition, so either 'source' or + * 'target' (but not both) must be -1. In other words, either + * + * source == local and target == remote + * or + * source == remote and target == local + */ +struct fsl_hv_ioctl_memcpy { + __u32 ret; + __u32 source; + __u32 target; + __u32 reserved; /* padding to ensure local_vaddr is aligned */ + __u64 local_vaddr; + __u64 remote_paddr; + __u64 count; +}; + +/** + * struct fsl_hv_ioctl_doorbell - ring a doorbell + * @ret: return error code from the hypervisor + * @doorbell: the handle of the doorbell to ring doorbell + * + * Used by FSL_HV_IOCTL_DOORBELL + */ +struct fsl_hv_ioctl_doorbell { + __u32 ret; + __u32 doorbell; +}; + +/** + * struct fsl_hv_ioctl_prop - get/set a device tree property + * @ret: return error code from the hypervisor + * @handle: handle of partition whose tree to access + * @path: virtual address of path name of node to access + * @propname: virtual address of name of property to access + * @propval: virtual address of property data buffer + * @proplen: Size of property data buffer + * @reserved: reserved, must be set to 0 + * + * Used by FSL_HV_IOCTL_DOORBELL + */ +struct fsl_hv_ioctl_prop { + __u32 ret; + __u32 handle; + __u64 path; + __u64 propname; + __u64 propval; + __u32 proplen; + __u32 reserved; /* padding to ensure structure is aligned */ +}; + +/* The ioctl type, documented in ioctl-number.txt */ +#define FSL_HV_IOCTL_TYPE 0xAF + +/* Restart another partition */ +#define FSL_HV_IOCTL_PARTITION_RESTART \ + _IOWR(FSL_HV_IOCTL_TYPE, 1, struct fsl_hv_ioctl_restart) + +/* Get a partition's status */ +#define FSL_HV_IOCTL_PARTITION_GET_STATUS \ + _IOWR(FSL_HV_IOCTL_TYPE, 2, struct fsl_hv_ioctl_status) + +/* Boot another partition */ +#define FSL_HV_IOCTL_PARTITION_START \ + _IOWR(FSL_HV_IOCTL_TYPE, 3, struct fsl_hv_ioctl_start) + +/* Stop this or another partition */ +#define FSL_HV_IOCTL_PARTITION_STOP \ + _IOWR(FSL_HV_IOCTL_TYPE, 4, struct fsl_hv_ioctl_stop) + +/* Copy data from one partition to another */ +#define FSL_HV_IOCTL_MEMCPY \ + _IOWR(FSL_HV_IOCTL_TYPE, 5, struct fsl_hv_ioctl_memcpy) + +/* Ring a doorbell */ +#define FSL_HV_IOCTL_DOORBELL \ + _IOWR(FSL_HV_IOCTL_TYPE, 6, struct fsl_hv_ioctl_doorbell) + +/* Get a property from another guest's device tree */ +#define FSL_HV_IOCTL_GETPROP \ + _IOWR(FSL_HV_IOCTL_TYPE, 7, struct fsl_hv_ioctl_prop) + +/* Set a property in another guest's device tree */ +#define FSL_HV_IOCTL_SETPROP \ + _IOWR(FSL_HV_IOCTL_TYPE, 8, struct fsl_hv_ioctl_prop) + +#ifdef __KERNEL__ + +/** + * fsl_hv_event_register() - register a callback for failover events + * @nb: pointer to caller-supplied notifier_block structure + * + * This function is called by device drivers to register their callback + * functions for fail-over events. + * + * The caller should allocate a notifier_block object and initialize the + * 'priority' and 'notifier_call' fields. + */ +int fsl_hv_failover_register(struct notifier_block *nb); + +/** + * fsl_hv_event_unregister() - unregister a callback for failover events + * @nb: the same 'nb' used in previous fsl_hv_failover_register call + */ +int fsl_hv_failover_unregister(struct notifier_block *nb); + +#endif + +#endif |