arch/x86/include/asm/hypervisor.h

   1 /*
   2  * Copyright (C) 2008, VMware, Inc.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  12  * NON INFRINGEMENT.  See the GNU General Public License for more
  13  * details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  */
  20 #ifndef _ASM_X86_HYPERVISOR_H
  21 #define _ASM_X86_HYPERVISOR_H
  22
  23 #ifdef CONFIG_HYPERVISOR_GUEST
  24
  25 #include <asm/kvm_para.h>
  26 #include <asm/xen/hypervisor.h>
  27
  28 /*
  29  * x86 hypervisor information
  30  */
  31 struct hypervisor_x86 {
  32         /* Hypervisor name */
  33         const char      *name;
  34
  35         /* Detection routine */
  36         uint32_t        (*detect)(void);
  37
  38         /* Platform setup (run once per boot) */
  39         void            (*init_platform)(void);
  40
  41         /* X2APIC detection (run once per boot) */
  42         bool            (*x2apic_available)(void);
  43
  44         /* pin current vcpu to specified physical cpu (run rarely) */
  45         void            (*pin_vcpu)(int);
  46
  47         /* called during init_mem_mapping() to setup early mappings. */
  48         void            (*init_mem_mapping)(void);
  49 };
  50
  51 extern const struct hypervisor_x86 *x86_hyper;
  52
  53 /* Recognized hypervisors */
  54 extern const struct hypervisor_x86 x86_hyper_vmware;
  55 extern const struct hypervisor_x86 x86_hyper_ms_hyperv;
  56 extern const struct hypervisor_x86 x86_hyper_xen_pv;
  57 extern const struct hypervisor_x86 x86_hyper_xen_hvm;
  58 extern const struct hypervisor_x86 x86_hyper_kvm;
  59
  60 extern void init_hypervisor_platform(void);
  61 extern bool hypervisor_x2apic_available(void);
  62 extern void hypervisor_pin_vcpu(int cpu);
  63
  64 static inline void hypervisor_init_mem_mapping(void)
  65 {
  66         if (x86_hyper && x86_hyper->init_mem_mapping)
  67                 x86_hyper->init_mem_mapping();
  68 }
  69 #else
  70 static inline void init_hypervisor_platform(void) { }
  71 static inline bool hypervisor_x2apic_available(void) { return false; }
  72 static inline void hypervisor_init_mem_mapping(void) { }
  73 #endif /* CONFIG_HYPERVISOR_GUEST */
  74 #endif /* _ASM_X86_HYPERVISOR_H */