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