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/*
* VMware VMCI Driver
*
* Copyright (C) 2012 VMware, Inc. All rights reserved.
*
* 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 version 2 and no 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/vmw_vmci_defs.h>
#include <linux/vmw_vmci_api.h>
#include <linux/atomic.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include "vmci_driver.h"
#include "vmci_event.h"
static bool vmci_disable_host;
module_param_named(disable_host, vmci_disable_host, bool, 0);
MODULE_PARM_DESC(disable_host,
"Disable driver host personality (default=enabled)");
static bool vmci_disable_guest;
module_param_named(disable_guest, vmci_disable_guest, bool, 0);
MODULE_PARM_DESC(disable_guest,
"Disable driver guest personality (default=enabled)");
static bool vmci_guest_personality_initialized;
static bool vmci_host_personality_initialized;
/*
* vmci_get_context_id() - Gets the current context ID.
*
* Returns the current context ID. Note that since this is accessed only
* from code running in the host, this always returns the host context ID.
*/
u32 vmci_get_context_id(void)
{
if (vmci_guest_code_active())
return vmci_get_vm_context_id();
else if (vmci_host_code_active())
return VMCI_HOST_CONTEXT_ID;
return VMCI_INVALID_ID;
}
EXPORT_SYMBOL_GPL(vmci_get_context_id);
static int __init vmci_drv_init(void)
{
int vmci_err;
int error;
vmci_err = vmci_event_init();
if (vmci_err < VMCI_SUCCESS) {
pr_err("Failed to initialize VMCIEvent (result=%d)\n",
vmci_err);
return -EINVAL;
}
if (!vmci_disable_guest) {
error = vmci_guest_init();
if (error) {
pr_warn("Failed to initialize guest personality (err=%d)\n",
error);
} else {
vmci_guest_personality_initialized = true;
pr_info("Guest personality initialized and is %s\n",
vmci_guest_code_active() ?
"active" : "inactive");
}
}
if (!vmci_disable_host) {
error = vmci_host_init();
if (error) {
pr_warn("Unable to initialize host personality (err=%d)\n",
error);
} else {
vmci_host_personality_initialized = true;
pr_info("Initialized host personality\n");
}
}
if (!vmci_guest_personality_initialized &&
!vmci_host_personality_initialized) {
vmci_event_exit();
return -ENODEV;
}
return 0;
}
module_init(vmci_drv_init);
static void __exit vmci_drv_exit(void)
{
if (vmci_guest_personality_initialized)
vmci_guest_exit();
if (vmci_host_personality_initialized)
vmci_host_exit();
vmci_event_exit();
}
module_exit(vmci_drv_exit);
MODULE_AUTHOR("VMware, Inc.");
MODULE_DESCRIPTION("VMware Virtual Machine Communication Interface.");
MODULE_VERSION("1.0.0.0-k");
MODULE_LICENSE("GPL v2");
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