/*
   * Common hypervisor code
   *
   * Copyright (C) 2008, VMware, Inc.
   * Author : Alok N Kataria <akataria@vmware.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, GOOD TITLE or
   * NON INFRINGEMENT.  See the GNU General Public License for more
   * details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   */

  #include <linux/module.h>

  #include <asm/processor.h>

  #include <asm/hypervisor.h>

  /*
   * Hypervisor detect order.  This is specified explicitly here because
   * some hypervisors might implement compatibility modes for other
   * hypervisors and therefore need to be detected in specific sequence.
   */
  static const __initconst struct hypervisor_x86 * const hypervisors[] =

  {

  #ifdef CONFIG_XEN_PVHVM

  	&x86_hyper_xen_hvm,

  #endif

  	&x86_hyper_vmware,
  	&x86_hyper_ms_hyperv,

  };

  const struct hypervisor_x86 *x86_hyper;

  EXPORT_SYMBOL(x86_hyper);

  
  static inline void __init
  detect_hypervisor_vendor(void)

  {

  	const struct hypervisor_x86 *h, * const *p;
  
  	for (p = hypervisors; p < hypervisors + ARRAY_SIZE(hypervisors); p++) {
  		h = *p;
  		if (h->detect()) {
  			x86_hyper = h;
  			printk(KERN_INFO "Hypervisor detected: %s
  ", h->name);
  			break;
  		}
  	}

  }

  void __cpuinit init_hypervisor(struct cpuinfo_x86 *c)
  {

  	if (x86_hyper && x86_hyper->set_cpu_features)
  		x86_hyper->set_cpu_features(c);

  }

  
  void __init init_hypervisor_platform(void)
  {

  
  	detect_hypervisor_vendor();
  
  	if (!x86_hyper)
  		return;

  	init_hypervisor(&boot_cpu_data);

  
  	if (x86_hyper->init_platform)
  		x86_hyper->init_platform();

  }