palacios/src/palacios/svm_handler.c

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