palacios/src/palacios/svm_handler.c

   1 #include <palacios/svm_handler.h>
   2 #include <palacios/vmm.h>
   3 #include <palacios/vm_guest_mem.h>
   4 #include <palacios/vmm_emulate.h>
   5 #include <palacios/vmm_ctrl_regs.h>
   6 #include <palacios/svm_io.h>
   7 #include <palacios/vmm_intr.h>
   8
   9
  10 extern struct vmm_os_hooks * os_hooks;
  11
  12
  13 int handle_svm_exit(struct guest_info * info) {
  14   vmcb_ctrl_t * guest_ctrl = 0;
  15   vmcb_saved_state_t * guest_state = 0;
  16   ulong_t exit_code = 0;
  17
  18   guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
  19   guest_state = GET_VMCB_SAVE_STATE_AREA((vmcb_t*)(info->vmm_data));
  20
  21
  22   // Update the high level state
  23   info->rip = guest_state->rip;
  24   info->vm_regs.rsp = guest_state->rsp;
  25   info->vm_regs.rax = guest_state->rax;
  26   info->vm_regs.rsp = guest_state->rsp;
  27
  28
  29   info->ctrl_regs.cr0 = guest_state->cr0;
  30   info->ctrl_regs.cr2 = guest_state->cr2;
  31   info->ctrl_regs.cr3 = guest_state->cr3;
  32   info->ctrl_regs.cr4 = guest_state->cr4;
  33   info->ctrl_regs.cr8 = guest_ctrl->guest_ctrl.V_TPR;
  34   info->ctrl_regs.rflags = guest_state->rflags;
  35
  36   get_vmcb_segments((vmcb_t*)(info->vmm_data), &(info->segments));
  37
  38
  39   exit_code = guest_ctrl->exit_code;
  40
  41   PrintDebug("SVM Returned: Exit Code: %x\n",exit_code);
  42   // PrintDebugVMCB((vmcb_t*)(info->vmm_data));
  43
  44
  45   // PrintDebug("SVM Returned:(VMCB=%x)\n", info->vmm_data);
  46   //PrintDebug("RIP: %x\n", guest_state->rip);
  47
  48
  49   //PrintDebug("SVM Returned: Exit Code: %x\n",exit_code);
  50
  51   if (exit_code == VMEXIT_IOIO) {
  52     struct svm_io_info * io_info = (struct svm_io_info *)&(guest_ctrl->exit_info1);
  53
  54     if (io_info->type == 0) {
  55       if (io_info->str) {
  56         if (handle_svm_io_outs(info) == -1 ) {
  57           return -1;
  58         }
  59       } else {
  60         if (handle_svm_io_out(info) == -1) {
  61           return -1;
  62         }
  63       }
  64     } else {
  65       if (io_info->str) {
  66         if (handle_svm_io_ins(info) == -1) {
  67           return -1;
  68         }
  69       } else {
  70         if (handle_svm_io_in(info) == -1) {
  71           return -1;
  72         }
  73       }
  74     }
  75   } else if (exit_code == VMEXIT_CR0_WRITE) {
  76     PrintDebug("CR0 Write\n");
  77
  78     if (handle_cr0_write(info) == -1) {
  79       return -1;
  80     }
  81   } else if (exit_code == VMEXIT_CR0_READ) {
  82     PrintDebug("CR0 Read\n");
  83
  84     if (handle_cr0_read(info) == -1) {
  85       return -1;
  86     }
  87   } else if (exit_code == VMEXIT_CR3_WRITE) {
  88     PrintDebug("CR3 Write\n");
  89
  90     if (handle_cr3_write(info) == -1) {
  91       return -1;
  92     }
  93   } else if (exit_code == VMEXIT_CR3_READ) {
  94     PrintDebug("CR3 Read\n");
  95
  96     if (handle_cr3_read(info) == -1) {
  97       return -1;
  98     }
  99
 100   } else if (exit_code == VMEXIT_EXCP14) {
 101     addr_t fault_addr = guest_ctrl->exit_info2;
 102     pf_error_t * error_code = (pf_error_t *)&(guest_ctrl->exit_info1);
 103
 104     PrintDebug("PageFault at %x (error=%d)\n", fault_addr, *error_code);
 105
 106
 107
 108     if (handle_shadow_pagefault(info, fault_addr, *error_code) == -1) {
 109       return -1;
 110     }
 111
 112     /*
 113       } else if (( (exit_code == VMEXIT_CR3_READ)  ||
 114       (exit_code == VMEXIT_CR3_WRITE) ||
 115       (exit_code == VMEXIT_INVLPG)    ||
 116       (exit_code == VMEXIT_INVLPGA)   ||
 117       (exit_code == VMEXIT_EXCP14)) &&
 118       (info->page_mode == SHADOW_PAGING)) {
 119       handle_shadow_paging(info);
 120     */
 121
 122   } else if (exit_code == VMEXIT_INTR) {
 123
 124     //    handle_svm_intr(info);
 125
 126   } else if (exit_code == VMEXIT_HLT) {
 127     PrintDebug("Guest halted\n");
 128     return -1;
 129   } else {
 130     addr_t rip_addr;
 131     char buf[15];
 132     addr_t host_addr;
 133
 134
 135     rip_addr = get_addr_linear(info, guest_state->rip, &(info->segments.cs));
 136
 137
 138
 139     PrintDebug("SVM Returned:(VMCB=%x)\n", info->vmm_data);
 140     PrintDebug("RIP: %x\n", guest_state->rip);
 141     PrintDebug("RIP Linear: %x\n", rip_addr);
 142
 143     PrintDebug("SVM Returned: Exit Code: %x\n",exit_code);
 144
 145     PrintDebug("io_info1 low = 0x%.8x\n", *(uint_t*)&(guest_ctrl->exit_info1));
 146     PrintDebug("io_info1 high = 0x%.8x\n", *(uint_t *)(((uchar_t *)&(guest_ctrl->exit_info1)) + 4));
 147
 148     PrintDebug("io_info2 low = 0x%.8x\n", *(uint_t*)&(guest_ctrl->exit_info2));
 149     PrintDebug("io_info2 high = 0x%.8x\n", *(uint_t *)(((uchar_t *)&(guest_ctrl->exit_info2)) + 4));
 150
 151
 152
 153     if (guest_pa_to_host_pa(info, guest_state->rip, &host_addr) == -1) {
 154       PrintDebug("Could not translate guest_state->rip to host address\n");
 155       return -1;
 156     }
 157
 158     PrintDebug("Host Address of rip = 0x%x\n", host_addr);
 159
 160     memset(buf, 0, 15);
 161
 162     PrintDebug("Reading from 0x%x in guest\n", rip_addr);
 163
 164     read_guest_pa_memory(info, rip_addr, 15, buf);
 165
 166     PrintTraceMemDump(buf, 15);
 167
 168     while(1);
 169
 170   }
 171
 172
 173   // Update the low level state
 174
 175   if (intr_pending(&(info->intr_state))) {
 176
 177     switch (get_intr_type(&(info->intr_state))) {
 178     case EXTERNAL_IRQ:
 179       guest_ctrl->EVENTINJ.vector = get_intr_number(&(info->intr_state));
 180       guest_ctrl->EVENTINJ.valid = 1;
 181       guest_ctrl->EVENTINJ.type = SVM_INJECTION_EXTERNAL_INTR;
 182
 183       break;
 184     case NMI:
 185       guest_ctrl->EVENTINJ.type = SVM_INJECTION_NMI;
 186       break;
 187     case EXCEPTION:
 188       guest_ctrl->EVENTINJ.type = SVM_INJECTION_EXCEPTION;
 189       guest_ctrl->EVENTINJ.error_code = info->intr_state.excp_error_code;
 190       break;
 191     case SOFTWARE:
 192       guest_ctrl->EVENTINJ.type = SVM_INJECTION_SOFT_INTR;
 193       break;
 194     case VIRTUAL:
 195       guest_ctrl->EVENTINJ.type = SVM_INJECTION_VIRTUAL_INTR;
 196       break;
 197
 198     case INVALID_INTR:
 199     default:
 200       PrintDebug("Attempted to issue an invalid interrupt\n");
 201       return -1;
 202     }
 203
 204
 205     PrintDebug("Injecting Interrupt %d (EIP=%x)\n", guest_ctrl->EVENTINJ.vector, info->rip);
 206
 207
 208     // IMPORTANT TODO
 209     // We need to figure out stack parameters....
 210
 211     //EVENTINJ.error_code
 212
 213   }
 214
 215
 216   guest_state->cr0 = info->ctrl_regs.cr0;
 217   guest_state->cr2 = info->ctrl_regs.cr2;
 218   guest_state->cr3 = info->ctrl_regs.cr3;
 219   guest_state->cr4 = info->ctrl_regs.cr4;
 220   guest_ctrl->guest_ctrl.V_TPR = info->ctrl_regs.cr8 & 0xff;
 221   guest_state->rflags = info->ctrl_regs.rflags;
 222
 223
 224   guest_state->rax = info->vm_regs.rax;
 225   guest_state->rip = info->rip;
 226   guest_state->rsp = info->vm_regs.rsp;
 227
 228
 229   set_vmcb_segments((vmcb_t*)(info->vmm_data), &(info->segments));
 230
 231   if (exit_code == VMEXIT_INTR) {
 232     PrintDebug("INTR ret IP = %x\n", guest_state->rip);
 233   }
 234
 235   return 0;
 236 }
 237
 238
 239
 240
 241 int handle_shadow_paging(struct guest_info * info) {
 242   vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
 243   //  vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA((vmcb_t*)(info->vmm_data));
 244
 245   if (guest_ctrl->exit_code == VMEXIT_CR3_READ) {
 246
 247   }
 248
 249   return 0;
 250 }
 251
 252
 253
 254 int handle_svm_intr(struct guest_info * info) {
 255   vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
 256   // vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA((vmcb_t*)(info->vmm_data));
 257
 258   //struct Interrupt_Info * int_info = &(guest_ctrl->exit_int_info);
 259
 260   //struct vmm_irq_hook * get_irq_hook(&(info->irq_map), int_info->vector);
 261
 262   PrintDebug("SVM Returned: Exit Code: %x\n",guest_ctrl->exit_code);
 263   PrintDebug("V_INTR_VECTOR: 0x%x\n", guest_ctrl->guest_ctrl.V_INTR_VECTOR);
 264
 265   while(1);
 266
 267   return 0;
 268 }