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/*
* (c) 2017 Stefano Stabellini <stefano@aporeto.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/module.h>
#include <xen/events.h>
#include <xen/grant_table.h>
#include <xen/xen.h>
#include <xen/xenbus.h>
#include <xen/interface/io/pvcalls.h>
static const struct xenbus_device_id pvcalls_front_ids[] = {
{ "pvcalls" },
{ "" }
};
static int pvcalls_front_remove(struct xenbus_device *dev)
{
return 0;
}
static int pvcalls_front_probe(struct xenbus_device *dev,
const struct xenbus_device_id *id)
{
return 0;
}
static void pvcalls_front_changed(struct xenbus_device *dev,
enum xenbus_state backend_state)
{
}
static struct xenbus_driver pvcalls_front_driver = {
.ids = pvcalls_front_ids,
.probe = pvcalls_front_probe,
.remove = pvcalls_front_remove,
.otherend_changed = pvcalls_front_changed,
};
static int __init pvcalls_frontend_init(void)
{
if (!xen_domain())
return -ENODEV;
pr_info("Initialising Xen pvcalls frontend driver\n");
return xenbus_register_frontend(&pvcalls_front_driver);
}
module_init(pvcalls_frontend_init);
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