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   // PrintDebugVMCB((vmcb_t*)(info->vmm_data));
  31
  32
  33   // PrintDebug("SVM Returned:(VMCB=%x)\n", info->vmm_data);
  34   //PrintDebug("RIP: %x\n", guest_state->rip);
  35
  36
  37   //PrintDebug("SVM Returned: Exit Code: %x\n",exit_code);
  38
  39   if (exit_code == VMEXIT_IOIO) {
  40     struct svm_io_info * io_info = (struct svm_io_info *)&(guest_ctrl->exit_info1);
  41
  42     if (io_info->type == 0) {
  43       if (io_info->str) {
  44         if (handle_svm_io_outs(info) == -1 ) {
  45           return -1;
  46         }
  47       } else {
  48         if (handle_svm_io_out(info) == -1) {
  49           return -1;
  50         }
  51       }
  52     } else {
  53       if (io_info->str) {
  54         if (handle_svm_io_ins(info) == -1) {
  55           return -1;
  56         }
  57       } else {
  58         if (handle_svm_io_in(info) == -1) {
  59           return -1;
  60         }
  61       }
  62     }
  63   } else if (exit_code == VMEXIT_CR0_WRITE) {
  64     PrintDebug("CR0 Write\n");
  65
  66     if (handle_cr0_write(info) == -1) {
  67       return -1;
  68     }
  69     /*
  70   } else if (( (exit_code == VMEXIT_CR3_READ)  ||
  71                (exit_code == VMEXIT_CR3_WRITE) ||
  72                (exit_code == VMEXIT_INVLPG)    ||
  73                (exit_code == VMEXIT_INVLPGA)   ||
  74                (exit_code == VMEXIT_EXCP14)) &&
  75              (info->page_mode == SHADOW_PAGING)) {
  76     handle_shadow_paging(info);
  77     */
  78
  79   } else if (exit_code == VMEXIT_INTR) {
  80
  81     //    handle_svm_intr(info);
  82   } else {
  83     addr_t rip_addr = get_addr_linear(info, guest_state->rip, guest_state->cs.selector);
  84     char buf[15];
  85     addr_t host_addr;
  86
  87
  88     PrintDebug("SVM Returned:(VMCB=%x)\n", info->vmm_data);
  89     PrintDebug("RIP: %x\n", guest_state->rip);
  90     PrintDebug("RIP Linear: %x\n", rip_addr);
  91
  92     PrintDebug("SVM Returned: Exit Code: %x\n",exit_code);
  93
  94     PrintDebug("io_info1 low = 0x%.8x\n", *(uint_t*)&(guest_ctrl->exit_info1));
  95     PrintDebug("io_info1 high = 0x%.8x\n", *(uint_t *)(((uchar_t *)&(guest_ctrl->exit_info1)) + 4));
  96
  97     PrintDebug("io_info2 low = 0x%.8x\n", *(uint_t*)&(guest_ctrl->exit_info2));
  98     PrintDebug("io_info2 high = 0x%.8x\n", *(uint_t *)(((uchar_t *)&(guest_ctrl->exit_info2)) + 4));
  99
 100
 101
 102     if (guest_pa_to_host_pa(info, guest_state->rip, &host_addr) == -1) {
 103       PrintDebug("Could not translate guest_state->rip to host address\n");
 104       return -1;
 105     }
 106
 107     PrintDebug("Host Address of rip = 0x%x\n", host_addr);
 108
 109     memset(buf, 0, 15);
 110
 111     PrintDebug("Reading from 0x%x in guest\n", rip_addr);
 112
 113     read_guest_pa_memory(info, rip_addr, 15, buf);
 114
 115     PrintTraceMemDump(buf, 15);
 116
 117     while(1);
 118
 119   }
 120
 121
 122   // Update the low level state
 123
 124   if (intr_pending(&(info->intr_state))) {
 125     guest_ctrl->EVENTINJ.vector = get_intr_number(&(info->intr_state));
 126     guest_ctrl->EVENTINJ.valid = 1;
 127
 128     switch (get_intr_type(&(info->intr_state))) {
 129     case EXTERNAL_IRQ:
 130       guest_ctrl->EVENTINJ.type = SVM_INJECTION_EXTERNAL_INTR;
 131       break;
 132     case NMI:
 133       guest_ctrl->EVENTINJ.type = SVM_INJECTION_NMI;
 134       break;
 135     case EXCEPTION:
 136       guest_ctrl->EVENTINJ.type = SVM_INJECTION_EXCEPTION;
 137       guest_ctrl->EVENTINJ.error_code = info->intr_state.excp_error_code;
 138       break;
 139     case SOFTWARE:
 140       guest_ctrl->EVENTINJ.type = SVM_INJECTION_SOFT_INTR;
 141       break;
 142     case VIRTUAL:
 143       guest_ctrl->EVENTINJ.type = SVM_INJECTION_VIRTUAL_INTR;
 144       break;
 145
 146     case INVALID_INTR:
 147     default:
 148       PrintDebug("Attempted to issue an invalid interrupt\n");
 149       return -1;
 150     }
 151
 152     // IMPORTANT TODO
 153     // We need to figure out stack parameters....
 154
 155     //EVENTINJ.error_code
 156
 157   }
 158
 159   guest_state->rax = info->vm_regs.rax;
 160   guest_state->rip = info->rip;
 161   guest_state->rsp = info->vm_regs.rsp;
 162
 163   return 0;
 164 }
 165
 166
 167
 168
 169 int handle_shadow_paging(struct guest_info * info) {
 170   vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
 171   //  vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA((vmcb_t*)(info->vmm_data));
 172
 173   if (guest_ctrl->exit_code == VMEXIT_CR3_READ) {
 174
 175   }
 176
 177   return 0;
 178 }
 179
 180
 181
 182 int handle_svm_intr(struct guest_info * info) {
 183   vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
 184   // vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA((vmcb_t*)(info->vmm_data));
 185
 186   //struct Interrupt_Info * int_info = &(guest_ctrl->exit_int_info);
 187
 188   //struct vmm_irq_hook * get_irq_hook(&(info->irq_map), int_info->vector);
 189
 190   PrintDebug("SVM Returned: Exit Code: %x\n",guest_ctrl->exit_code);
 191   PrintDebug("V_INTR_VECTOR: 0x%x\n", guest_ctrl->guest_ctrl.V_INTR_VECTOR);
 192
 193
 194
 195
 196   while(1);
 197
 198
 199
 200
 201
 202
 203
 204
 205
 206   return 0;
 207 }