palacios/src/geekos/svm_handler.c

   1 #include <geekos/svm_handler.h>
   2 #include <geekos/vmm.h>
   3 #include <geekos/svm_ctrl_regs.h>
   4
   5
   6
   7 int handle_svm_exit(guest_info_t * info) {
   8   vmcb_ctrl_t * guest_ctrl = 0;
   9   vmcb_saved_state_t * guest_state = 0;
  10   ulong_t exit_code = 0;
  11
  12   guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
  13   guest_state = GET_VMCB_SAVE_STATE_AREA((vmcb_t*)(info->vmm_data));
  14
  15
  16   // Update the high level state
  17   info->rip = guest_state->rip;
  18   info->rsp = guest_state->rsp;
  19
  20
  21   PrintDebug("SVM Returned: (Exit Code=%x) (VMCB=%x)\n",&(guest_ctrl->exit_code), info->vmm_data);
  22   PrintDebug("RIP: %x\n", guest_state->rip);
  23
  24
  25
  26   exit_code = guest_ctrl->exit_code;
  27
  28   //  PrintDebugVMCB((vmcb_t*)(info->vmm_data));
  29   PrintDebug("SVM Returned: Exit Code: %x\n",exit_code);
  30   PrintDebug("io_info1 low = 0x%.8x\n", *(uint_t*)&(guest_ctrl->exit_info1));
  31   PrintDebug("io_info1 high = 0x%.8x\n", *(uint_t *)(((uchar_t *)&(guest_ctrl->exit_info1)) + 4));
  32
  33   PrintDebug("io_info2 low = 0x%.8x\n", *(uint_t*)&(guest_ctrl->exit_info2));
  34   PrintDebug("io_info2 high = 0x%.8x\n", *(uint_t *)(((uchar_t *)&(guest_ctrl->exit_info2)) + 4));
  35   if (exit_code == VMEXIT_IOIO) {
  36     handle_svm_io(info);
  37
  38   } else if (exit_code == VMEXIT_CR0_WRITE) {
  39     PrintDebug("CR0 Write\n");
  40     ullong_t new_cr0 = 0;
  41
  42     handle_cr0_write(info, &new_cr0);
  43
  44     guest_state->cr0 = new_cr0;
  45
  46   } else if (( (exit_code == VMEXIT_CR3_READ)  ||
  47                (exit_code == VMEXIT_CR3_WRITE) ||
  48                (exit_code == VMEXIT_INVLPG)    ||
  49                (exit_code == VMEXIT_INVLPGA)   ||
  50                (exit_code == VMEXIT_EXCP14)) &&
  51              (info->page_mode == SHADOW_PAGING)) {
  52     handle_shadow_paging(info);
  53   }
  54
  55
  56   // Update the low level state
  57   guest_state->rip = info->rip;
  58   guest_state->rsp = info->rsp;
  59
  60   return 0;
  61 }
  62
  63
  64
  65 // This should package up an IO request and call vmm_handle_io
  66 int handle_svm_io(guest_info_t * info) {
  67   vmcb_ctrl_t * ctrl_area = GET_VMCB_CTRL_AREA((vmcb_t *)(info->vmm_data));
  68   vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA((vmcb_t*)(info->vmm_data));
  69
  70   PrintDebug("Ctrl Area=%x\n", ctrl_area);
  71
  72   //  struct svm_io_info * io_info = (struct svm_io_info *)&(ctrl_area->exit_info1);
  73
  74
  75
  76   //  PrintDebugVMCB((vmcb_t*)(info->vmm_data));
  77
  78   guest_state->rip = ctrl_area->exit_info2;
  79
  80
  81
  82
  83   //  PrintDebug("Exit On Port %d\n", io_info->port);
  84
  85   return 0;
  86 }
  87
  88
  89 int handle_shadow_paging(guest_info_t * info) {
  90   vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
  91   //  vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA((vmcb_t*)(info->vmm_data));
  92
  93   if (guest_ctrl->exit_code == VMEXIT_CR3_READ) {
  94
  95   }
  96
  97   return 0;
  98 }
  99
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