arch/x86/kernel/cpu/hypervisor.c

   1 /*
   2  * Common hypervisor code
   3  *
   4  * Copyright (C) 2008, VMware, Inc.
   5  * Author : Alok N Kataria <akataria@vmware.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  15  * NON INFRINGEMENT.  See the GNU General Public License for more
  16  * details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  21  *
  22  */
  23
  24 #include <asm/processor.h>
  25 #include <asm/vmware.h>
  26 #include <asm/mshyperv.h>
  27 #include <asm/hypervisor.h>
  28
  29 static inline void __cpuinit
  30 detect_hypervisor_vendor(struct cpuinfo_x86 *c)
  31 {
  32         if (vmware_platform())
  33                 c->x86_hyper_vendor = X86_HYPER_VENDOR_VMWARE;
  34         else if (ms_hyperv_platform())
  35                 c->x86_hyper_vendor = X86_HYPER_VENDOR_MSFT;
  36         else
  37                 c->x86_hyper_vendor = X86_HYPER_VENDOR_NONE;
  38 }
  39
  40 static inline void __cpuinit
  41 hypervisor_set_feature_bits(struct cpuinfo_x86 *c)
  42 {
  43         if (boot_cpu_data.x86_hyper_vendor == X86_HYPER_VENDOR_VMWARE)
  44                 vmware_set_feature_bits(c);
  45         else if (boot_cpu_data.x86_hyper_vendor == X86_HYPER_VENDOR_MSFT)
  46                 ms_hyperv_set_feature_bits(c);
  47         return;
  48 }
  49
  50 void __cpuinit init_hypervisor(struct cpuinfo_x86 *c)
  51 {
  52         detect_hypervisor_vendor(c);
  53         hypervisor_set_feature_bits(c);
  54 }
  55
  56 void __init init_hypervisor_platform(void)
  57 {
  58         init_hypervisor(&boot_cpu_data);
  59         if (boot_cpu_data.x86_hyper_vendor == X86_HYPER_VENDOR_VMWARE)
  60                 vmware_platform_setup();
  61 }