palacios/src/palacios/svm_lowlevel.S

   1 #;  -*- fundamental -*-
   2
   3
   4 .text
   5 .align 4
   6
   7 .globl v3_svm_launch
   8 .globl v3_stgi
   9 .globl v3_clgi
  10
  11 #define SVM_ERROR .dword 0xffffffff
  12 #define SVM_SUCCESS .dword 0x00000000
  13
  14 #define vmrun .byte 0x0f,0x01,0xd8
  15 #define vmload .byte 0x0F,0x01,0xDA
  16 #define vmsave .byte 0x0F,0x01,0xDB
  17 #define stgi   .byte 0x0F,0x01,0xDC
  18 #define clgi   .byte 0x0F,0x01,0xDD
  19
  20
  21 #ifdef __V3_32BIT__
  22
  23 #define Save_SVM_Registers(location)    \
  24         pushl   %eax;                   \
  25         movl    location, %eax;         \
  26         movl    %edi, (%eax);           \
  27         movl    %esi, 8(%eax);          \
  28         movl    %ebp, 16(%eax);         \
  29         movl    $0, 24(%eax);           \
  30         movl    %ebx, 32(%eax);         \
  31         movl    %edx, 40(%eax);         \
  32         movl    %ecx, 48(%eax);         \
  33         pushl   %ebx;                   \
  34         movl    8(%esp), %ebx;          \
  35         movl    %ebx, 56(%eax);         \
  36         popl    %ebx;                   \
  37         popl    %eax;
  38
  39
  40 #define Restore_SVM_Registers(location) \
  41         pushl   %eax;                   \
  42         movl    location, %eax;         \
  43         movl    (%eax), %edi;           \
  44         movl    8(%eax), %esi;          \
  45         movl    16(%eax), %ebp;         \
  46         movl    32(%eax), %ebx;         \
  47         movl    40(%eax), %edx;         \
  48         movl    48(%eax), %ecx;         \
  49         popl    %eax;
  50
  51
  52 v3_svm_launch:
  53         push    %ebp;
  54         movl    %esp, %ebp;
  55         pushf;
  56         push    %fs;
  57         push    %gs;
  58         pusha;
  59
  60         pushl   12(%ebp);
  61         pushl   8(%ebp);
  62
  63         Restore_SVM_Registers(8(%esp));
  64         popl    %eax;
  65
  66         vmload;
  67         vmrun;
  68         vmsave;
  69
  70         Save_SVM_Registers(4(%esp));
  71
  72         addl    $4, %esp;
  73
  74         popa;
  75         pop     %gs;
  76         pop     %fs;
  77         popf;
  78         pop     %ebp;
  79         ret
  80
  81
  82
  83 #elif __V3_64BIT__
  84
  85 #define Save_SVM_Registers(location)    \
  86         pushq   %rax;                   \
  87         movq    location, %rax;         \
  88         movq    %rdi, (%rax);           \
  89         movq    %rsi, 8(%rax);          \
  90         movq    %rbp, 16(%rax);         \
  91         movq    $0, 24(%rax);           \
  92         movq    %rbx, 32(%rax);         \
  93         movq    %rdx, 40(%rax);         \
  94         movq    %rcx, 48(%rax);         \
  95         pushq   %rbx;                   \
  96         movq    16(%rsp), %rbx;         \
  97         movq    %rbx, 56(%rax);         \
  98         popq    %rbx;                   \
  99                                         \
 100         movq    %r8, 64(%rax);          \
 101         movq    %r9, 72(%rax);          \
 102         movq    %r10, 80(%rax);         \
 103         movq    %r11, 88(%rax);         \
 104         movq    %r12, 96(%rax);         \
 105         movq    %r13, 104(%rax);        \
 106         movq    %r14, 112(%rax);        \
 107         movq    %r15, 120(%rax);        \
 108         popq    %rax;
 109
 110
 111 #define Restore_SVM_Registers(location) \
 112         push    %rax;                   \
 113         mov     location, %rax;         \
 114         mov     (%rax), %rdi;           \
 115         mov     8(%rax), %rsi;          \
 116         mov     16(%rax), %rbp;         \
 117         mov     32(%rax), %rbx;         \
 118         mov     40(%rax), %rdx;         \
 119         mov     48(%rax), %rcx;         \
 120                                         \
 121         mov     64(%rax), %r8;          \
 122         mov     72(%rax), %r9;          \
 123         mov     80(%rax), %r10;         \
 124         mov     88(%rax), %r11;         \
 125         mov     96(%rax), %r12;         \
 126         mov     104(%rax), %r13;        \
 127         mov     112(%rax), %r14;        \
 128         mov     120(%rax), %r15;        \
 129         pop     %rax;
 130
 131
 132
 133
 134 #define PUSHA                           \
 135         pushq %rbp;                     \
 136         pushq %rbx;                     \
 137         pushq %r8;                      \
 138         pushq %r9;                      \
 139         pushq %r10;                     \
 140         pushq %r11;                     \
 141         pushq %r12;                     \
 142         pushq %r13;                     \
 143         pushq %r14;                     \
 144         pushq %r15;
 145
 146
 147 #define POPA                            \
 148         popq %r15;                      \
 149         popq %r14;                      \
 150         popq %r13;                      \
 151         popq %r12;                      \
 152         popq %r11;                      \
 153         popq %r10;                      \
 154         popq %r9;                       \
 155         popq %r8;                       \
 156         popq %rbx;                      \
 157         popq %rbp;
 158
 159 // VMCB => RDI
 160 // vm_regs => RSI
 161
 162 v3_svm_launch:
 163         pushf;
 164         push    %fs;
 165         push    %gs;
 166         PUSHA
 167
 168         pushq %rsi
 169
 170         movq    %rdi, %rax
 171         Restore_SVM_Registers(%rsi);
 172
 173
 174         vmload;
 175         vmrun;
 176         vmsave;
 177
 178
 179         Save_SVM_Registers(8(%rsp));
 180
 181         addq $8, %rsp
 182
 183         POPA
 184         pop     %gs;
 185         pop     %fs;
 186         popf;
 187         ret
 188
 189
 190 #endif
 191
 192
 193 v3_stgi:
 194         stgi;
 195         ret;
 196
 197 v3_clgi:
 198         clgi;
 199         ret;
 200
 201