linux-imx

/*

 * Freescale Hypervisor Management Driver

​

 * Copyright (C) 2008-2011 Freescale Semiconductor, Inc.

 * Author: Timur Tabi <timur@freescale.com>

 *

 * This file is licensed under the terms of the GNU General Public License

 * version 2.  This program is licensed "as is" without any warranty of any

 * kind, whether express or implied.

 *

 * The Freescale hypervisor management driver provides several services to

 * drivers and applications related to the Freescale hypervisor:

 *

 * 1. An ioctl interface for querying and managing partitions.

 *

 * 2. A file interface to reading incoming doorbells.

 *

 * 3. An interrupt handler for shutting down the partition upon receiving the

 *    shutdown doorbell from a manager partition.

 *

 * 4. A kernel interface for receiving callbacks when a managed partition

 *    shuts down.

 */

​

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/init.h>

#include <linux/types.h>

#include <linux/err.h>

#include <linux/fs.h>

#include <linux/miscdevice.h>

#include <linux/mm.h>

#include <linux/pagemap.h>

#include <linux/slab.h>

#include <linux/poll.h>

#include <linux/of.h>

#include <linux/of_irq.h>

#include <linux/reboot.h>

#include <linux/uaccess.h>

#include <linux/notifier.h>

#include <linux/interrupt.h>

​

#include <linux/io.h>

#include <asm/fsl_hcalls.h>

​

#include <linux/fsl_hypervisor.h>

​

static BLOCKING_NOTIFIER_HEAD(failover_subscribers);

​

/*

 * Ioctl interface for FSL_HV_IOCTL_PARTITION_RESTART

 *

 * Restart a running partition

 */

static long ioctl_restart(struct fsl_hv_ioctl_restart __user *p)

{

    struct fsl_hv_ioctl_restart param;

​

    /* Get the parameters from the user */

    if (copy_from_user(&param, p, sizeof(struct fsl_hv_ioctl_restart)))

        return -EFAULT;

​

    param.ret = fh_partition_restart(param.partition);

​

    if (copy_to_user(&p->ret, &param.ret, sizeof(__u32)))

        return -EFAULT;

​

    return 0;

}

​

/*

 * Ioctl interface for FSL_HV_IOCTL_PARTITION_STATUS

 *

 * Query the status of a partition

 */

static long ioctl_status(struct fsl_hv_ioctl_status __user *p)

{

    struct fsl_hv_ioctl_status param;

    u32 status;

​

    /* Get the parameters from the user */

    if (copy_from_user(&param, p, sizeof(struct fsl_hv_ioctl_status)))

        return -EFAULT;

​

    param.ret = fh_partition_get_status(param.partition, &status);

    if (!param.ret)

        param.status = status;

​

    if (copy_to_user(p, &param, sizeof(struct fsl_hv_ioctl_status)))

        return -EFAULT;

​

    return 0;