sys/arch/xen/include/xen3-public/hvm/vmx_assist.h

   1 /* $NetBSD: vmx_assist.h,v 1.3 2007/10/17 19:58:31 garbled Exp $ */
   2 /*
   3  * vmx_assist.h: Context definitions for the VMXASSIST world switch.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a copy
   6  * of this software and associated documentation files (the "Software"), to
   7  * deal in the Software without restriction, including without limitation the
   8  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
   9  * sell copies of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be included in
  13  * all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  18  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  *
  23  * Leendert van Doorn, leendert@watson.ibm.com
  24  * Copyright (c) 2005, International Business Machines Corporation.
  25  */
  26
  27 #ifndef _VMX_ASSIST_H_
  28 #define _VMX_ASSIST_H_
  29
  30 #define VMXASSIST_BASE         0xD0000
  31 #define VMXASSIST_MAGIC        0x17101966
  32 #define VMXASSIST_MAGIC_OFFSET (VMXASSIST_BASE+8)
  33
  34 #define VMXASSIST_NEW_CONTEXT (VMXASSIST_BASE + 12)
  35 #define VMXASSIST_OLD_CONTEXT (VMXASSIST_NEW_CONTEXT + 4)
  36
  37 #ifndef __ASSEMBLY__
  38
  39 #define NR_EXCEPTION_HANDLER    32
  40 #define NR_INTERRUPT_HANDLERS   16
  41 #define NR_TRAPS        (NR_EXCEPTION_HANDLER+NR_INTERRUPT_HANDLERS)
  42
  43 union vmcs_arbytes {
  44     struct arbyte_fields {
  45         unsigned int seg_type : 4,
  46             s         : 1,
  47             dpl       : 2,
  48             p         : 1,
  49             reserved0 : 4,
  50             avl       : 1,
  51             reserved1 : 1,
  52             default_ops_size: 1,
  53             g         : 1,
  54             null_bit  : 1,
  55             reserved2 : 15;
  56     } fields;
  57     unsigned int bytes;
  58 };
  59
  60 /*
  61  * World switch state
  62  */
  63 struct vmx_assist_context {
  64     uint32_t  eip;        /* execution pointer */
  65     uint32_t  esp;        /* stack pointer */
  66     uint32_t  eflags;     /* flags register */
  67     uint32_t  cr0;
  68     uint32_t  cr3;        /* page table directory */
  69     uint32_t  cr4;
  70     uint32_t  idtr_limit; /* idt */
  71     uint32_t  idtr_base;
  72     uint32_t  gdtr_limit; /* gdt */
  73     uint32_t  gdtr_base;
  74     uint32_t  cs_sel;     /* cs selector */
  75     uint32_t  cs_limit;
  76     uint32_t  cs_base;
  77     union vmcs_arbytes cs_arbytes;
  78     uint32_t  ds_sel;     /* ds selector */
  79     uint32_t  ds_limit;
  80     uint32_t  ds_base;
  81     union vmcs_arbytes ds_arbytes;
  82     uint32_t  es_sel;     /* es selector */
  83     uint32_t  es_limit;
  84     uint32_t  es_base;
  85     union vmcs_arbytes es_arbytes;
  86     uint32_t  ss_sel;     /* ss selector */
  87     uint32_t  ss_limit;
  88     uint32_t  ss_base;
  89     union vmcs_arbytes ss_arbytes;
  90     uint32_t  fs_sel;     /* fs selector */
  91     uint32_t  fs_limit;
  92     uint32_t  fs_base;
  93     union vmcs_arbytes fs_arbytes;
  94     uint32_t  gs_sel;     /* gs selector */
  95     uint32_t  gs_limit;
  96     uint32_t  gs_base;
  97     union vmcs_arbytes gs_arbytes;
  98     uint32_t  tr_sel;     /* task selector */
  99     uint32_t  tr_limit;
 100     uint32_t  tr_base;
 101     union vmcs_arbytes tr_arbytes;
 102     uint32_t  ldtr_sel;   /* ldtr selector */
 103     uint32_t  ldtr_limit;
 104     uint32_t  ldtr_base;
 105     union vmcs_arbytes ldtr_arbytes;
 106
 107     unsigned char rm_irqbase[2];
 108 };
 109 typedef struct vmx_assist_context vmx_assist_context_t;
 110
 111 #endif /* __ASSEMBLY__ */
 112
 113 #endif /* _VMX_ASSIST_H_ */
 114
 115 /*
 116  * Local variables:
 117  * mode: C
 118  * c-set-style: "BSD"
 119  * c-basic-offset: 4
 120  * tab-width: 4
 121  * indent-tabs-mode: nil
 122  * End:
 123  */