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