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