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
  83   } else if (exit_code == VMEXIT_HLT) {
  84     PrintDebug("Guest halted\n");
  85     return -1;
  86   } else {
  87     addr_t rip_addr = get_addr_linear(info, guest_state->rip, guest_state->cs.selector);
  88     char buf[15];
  89     addr_t host_addr;
  90
  91
  92     PrintDebug("SVM Returned:(VMCB=%x)\n", info->vmm_data);
  93     PrintDebug("RIP: %x\n", guest_state->rip);
  94     PrintDebug("RIP Linear: %x\n", rip_addr);
  95
  96     PrintDebug("SVM Returned: Exit Code: %x\n",exit_code);
  97
  98     PrintDebug("io_info1 low = 0x%.8x\n", *(uint_t*)&(guest_ctrl->exit_info1));
  99     PrintDebug("io_info1 high = 0x%.8x\n", *(uint_t *)(((uchar_t *)&(guest_ctrl->exit_info1)) + 4));
 100
 101     PrintDebug("io_info2 low = 0x%.8x\n", *(uint_t*)&(guest_ctrl->exit_info2));
 102     PrintDebug("io_info2 high = 0x%.8x\n", *(uint_t *)(((uchar_t *)&(guest_ctrl->exit_info2)) + 4));
 103
 104
 105
 106     if (guest_pa_to_host_pa(info, guest_state->rip, &host_addr) == -1) {
 107       PrintDebug("Could not translate guest_state->rip to host address\n");
 108       return -1;
 109     }
 110
 111     PrintDebug("Host Address of rip = 0x%x\n", host_addr);
 112
 113     memset(buf, 0, 15);
 114
 115     PrintDebug("Reading from 0x%x in guest\n", rip_addr);
 116
 117     read_guest_pa_memory(info, rip_addr, 15, buf);
 118
 119     PrintTraceMemDump(buf, 15);
 120
 121     while(1);
 122
 123   }
 124
 125
 126   // Update the low level state
 127
 128   if (intr_pending(&(info->intr_state))) {
 129     guest_ctrl->EVENTINJ.vector = get_intr_number(&(info->intr_state));
 130     guest_ctrl->EVENTINJ.valid = 1;
 131
 132     switch (get_intr_type(&(info->intr_state))) {
 133     case EXTERNAL_IRQ:
 134       guest_ctrl->EVENTINJ.type = SVM_INJECTION_EXTERNAL_INTR;
 135       break;
 136     case NMI:
 137       guest_ctrl->EVENTINJ.type = SVM_INJECTION_NMI;
 138       break;
 139     case EXCEPTION:
 140       guest_ctrl->EVENTINJ.type = SVM_INJECTION_EXCEPTION;
 141       guest_ctrl->EVENTINJ.error_code = info->intr_state.excp_error_code;
 142       break;
 143     case SOFTWARE:
 144       guest_ctrl->EVENTINJ.type = SVM_INJECTION_SOFT_INTR;
 145       break;
 146     case VIRTUAL:
 147       guest_ctrl->EVENTINJ.type = SVM_INJECTION_VIRTUAL_INTR;
 148       break;
 149
 150     case INVALID_INTR:
 151     default:
 152       PrintDebug("Attempted to issue an invalid interrupt\n");
 153       return -1;
 154     }
 155
 156     // IMPORTANT TODO
 157     // We need to figure out stack parameters....
 158
 159     //EVENTINJ.error_code
 160
 161   }
 162
 163   guest_state->rax = info->vm_regs.rax;
 164   guest_state->rip = info->rip;
 165   guest_state->rsp = info->vm_regs.rsp;
 166
 167   return 0;
 168 }
 169
 170
 171
 172
 173 int handle_shadow_paging(struct guest_info * info) {
 174   vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
 175   //  vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA((vmcb_t*)(info->vmm_data));
 176
 177   if (guest_ctrl->exit_code == VMEXIT_CR3_READ) {
 178
 179   }
 180
 181   return 0;
 182 }
 183
 184
 185
 186 int handle_svm_intr(struct guest_info * info) {
 187   vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
 188   // vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA((vmcb_t*)(info->vmm_data));
 189
 190   //struct Interrupt_Info * int_info = &(guest_ctrl->exit_int_info);
 191
 192   //struct vmm_irq_hook * get_irq_hook(&(info->irq_map), int_info->vector);
 193
 194   PrintDebug("SVM Returned: Exit Code: %x\n",guest_ctrl->exit_code);
 195   PrintDebug("V_INTR_VECTOR: 0x%x\n", guest_ctrl->guest_ctrl.V_INTR_VECTOR);
 196
 197
 198
 199
 200   while(1);
 201
 202
 203
 204
 205
 206
 207
 208
 209
 210   return 0;
 211 }