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
  40   // Disable printing io exits due to bochs debug messages
  41   if (!((exit_code == VMEXIT_IOIO) && ((ushort_t)(guest_ctrl->exit_info1 >> 16) == 0x402))) {
  42
  43     PrintDebug("SVM Returned: Exit Code: %x \t\t(tsc=%ul)\n",exit_code, (uint_t)info->time_state.guest_tsc);
  44   }
  45   // PrintDebugVMCB((vmcb_t*)(info->vmm_data));
  46
  47
  48   // PrintDebug("SVM Returned:(VMCB=%x)\n", info->vmm_data);
  49   //PrintDebug("RIP: %x\n", guest_state->rip);
  50
  51
  52   //PrintDebug("SVM Returned: Exit Code: %x\n",exit_code);
  53
  54   if (exit_code == VMEXIT_IOIO) {
  55     struct svm_io_info * io_info = (struct svm_io_info *)&(guest_ctrl->exit_info1);
  56
  57     if (io_info->type == 0) {
  58       if (io_info->str) {
  59         if (handle_svm_io_outs(info) == -1 ) {
  60           return -1;
  61         }
  62       } else {
  63         if (handle_svm_io_out(info) == -1) {
  64           return -1;
  65         }
  66       }
  67     } else {
  68       if (io_info->str) {
  69         if (handle_svm_io_ins(info) == -1) {
  70           return -1;
  71         }
  72       } else {
  73         if (handle_svm_io_in(info) == -1) {
  74           return -1;
  75         }
  76       }
  77     }
  78   } else if (exit_code == VMEXIT_CR0_WRITE) {
  79     PrintDebug("CR0 Write\n");
  80
  81     if (handle_cr0_write(info) == -1) {
  82       return -1;
  83     }
  84   } else if (exit_code == VMEXIT_CR0_READ) {
  85     PrintDebug("CR0 Read\n");
  86
  87     if (handle_cr0_read(info) == -1) {
  88       return -1;
  89     }
  90   } else if (exit_code == VMEXIT_CR3_WRITE) {
  91     PrintDebug("CR3 Write\n");
  92
  93     if (handle_cr3_write(info) == -1) {
  94       return -1;
  95     }
  96   } else if (exit_code == VMEXIT_CR3_READ) {
  97     PrintDebug("CR3 Read\n");
  98
  99     if (handle_cr3_read(info) == -1) {
 100       return -1;
 101     }
 102
 103   } else if (exit_code == VMEXIT_EXCP14) {
 104     addr_t fault_addr = guest_ctrl->exit_info2;
 105     pf_error_t * error_code = (pf_error_t *)&(guest_ctrl->exit_info1);
 106
 107     PrintDebug("PageFault at %x (error=%d)\n", fault_addr, *error_code);
 108
 109     if (info->page_mode == SHADOW_PAGING) {
 110       if (handle_shadow_pagefault(info, fault_addr, *error_code) == -1) {
 111         return -1;
 112       }
 113     } else {
 114       PrintDebug("Page fault in un implemented paging mode\n");
 115       return -1;
 116     }
 117
 118   } else if (exit_code == VMEXIT_INVLPG) {
 119     if (info->page_mode == SHADOW_PAGING) {
 120       PrintDebug("Invlpg\n");
 121       if (handle_shadow_invlpg(info) == -1) {
 122         return -1;
 123       }
 124     }
 125
 126     /*
 127       (exit_code == VMEXIT_INVLPGA)   ||
 128     */
 129
 130   } else if (exit_code == VMEXIT_INTR) {
 131
 132     //    handle_svm_intr(info);
 133
 134   } else if (exit_code == VMEXIT_HLT) {
 135     PrintDebug("Guest halted\n");
 136     return -1;
 137   } else {
 138     addr_t rip_addr;
 139     char buf[15];
 140     addr_t host_addr;
 141
 142
 143     rip_addr = get_addr_linear(info, guest_state->rip, &(info->segments.cs));
 144
 145
 146
 147     PrintDebug("SVM Returned:(VMCB=%x)\n", info->vmm_data);
 148     PrintDebug("RIP: %x\n", guest_state->rip);
 149     PrintDebug("RIP Linear: %x\n", rip_addr);
 150
 151     PrintDebug("SVM Returned: Exit Code: %x\n",exit_code);
 152
 153     PrintDebug("io_info1 low = 0x%.8x\n", *(uint_t*)&(guest_ctrl->exit_info1));
 154     PrintDebug("io_info1 high = 0x%.8x\n", *(uint_t *)(((uchar_t *)&(guest_ctrl->exit_info1)) + 4));
 155
 156     PrintDebug("io_info2 low = 0x%.8x\n", *(uint_t*)&(guest_ctrl->exit_info2));
 157     PrintDebug("io_info2 high = 0x%.8x\n", *(uint_t *)(((uchar_t *)&(guest_ctrl->exit_info2)) + 4));
 158
 159
 160
 161     if (guest_pa_to_host_pa(info, guest_state->rip, &host_addr) == -1) {
 162       PrintDebug("Could not translate guest_state->rip to host address\n");
 163       return -1;
 164     }
 165
 166     PrintDebug("Host Address of rip = 0x%x\n", host_addr);
 167
 168     memset(buf, 0, 15);
 169
 170     PrintDebug("Reading from 0x%x in guest\n", rip_addr);
 171
 172     read_guest_pa_memory(info, rip_addr, 15, buf);
 173
 174     PrintTraceMemDump(buf, 15);
 175
 176     while(1);
 177
 178   }
 179
 180
 181   // Update the low level state
 182
 183   if (intr_pending(info)) {
 184
 185     switch (get_intr_type(info)) {
 186     case EXTERNAL_IRQ:
 187       {
 188         uint_t irq = get_intr_number(info);
 189         guest_ctrl->EVENTINJ.vector = irq;
 190         guest_ctrl->EVENTINJ.valid = 1;
 191         guest_ctrl->EVENTINJ.type = SVM_INJECTION_EXTERNAL_INTR;
 192
 193         injecting_intr(info, irq, EXTERNAL_IRQ);
 194
 195         break;
 196       }
 197     case NMI:
 198       guest_ctrl->EVENTINJ.type = SVM_INJECTION_NMI;
 199       break;
 200     case EXCEPTION:
 201       {
 202         uint_t excp = get_intr_number(info);
 203
 204         guest_ctrl->EVENTINJ.type = SVM_INJECTION_EXCEPTION;
 205
 206         if (info->intr_state.excp_error_code) {
 207           guest_ctrl->EVENTINJ.error_code = info->intr_state.excp_error_code;
 208           guest_ctrl->EVENTINJ.ev = 1;
 209         }
 210
 211         guest_ctrl->EVENTINJ.vector = excp;
 212
 213         injecting_intr(info, excp, EXCEPTION);
 214         break;
 215       }
 216     case SOFTWARE:
 217       guest_ctrl->EVENTINJ.type = SVM_INJECTION_SOFT_INTR;
 218       break;
 219     case VIRTUAL:
 220       guest_ctrl->EVENTINJ.type = SVM_INJECTION_VIRTUAL_INTR;
 221       break;
 222
 223     case INVALID_INTR:
 224     default:
 225       PrintDebug("Attempted to issue an invalid interrupt\n");
 226       return -1;
 227     }
 228
 229     PrintDebug("Injecting Interrupt %d (EIP=%x)\n", guest_ctrl->EVENTINJ.vector, info->rip);
 230   }
 231
 232
 233   guest_state->cr0 = info->ctrl_regs.cr0;
 234   guest_state->cr2 = info->ctrl_regs.cr2;
 235   guest_state->cr3 = info->ctrl_regs.cr3;
 236   guest_state->cr4 = info->ctrl_regs.cr4;
 237   guest_ctrl->guest_ctrl.V_TPR = info->ctrl_regs.cr8 & 0xff;
 238   guest_state->rflags = info->ctrl_regs.rflags;
 239
 240
 241   guest_state->cpl = info->cpl;
 242
 243   guest_state->rax = info->vm_regs.rax;
 244   guest_state->rip = info->rip;
 245   guest_state->rsp = info->vm_regs.rsp;
 246
 247
 248   set_vmcb_segments((vmcb_t*)(info->vmm_data), &(info->segments));
 249
 250   if (exit_code == VMEXIT_INTR) {
 251     PrintDebug("INTR ret IP = %x\n", guest_state->rip);
 252   }
 253
 254   return 0;
 255 }
 256