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
  29
  30
  31
  32   exit_code = guest_ctrl->exit_code;
  33
  34   // PrintDebugVMCB((vmcb_t*)(info->vmm_data));
  35
  36
  37   if (exit_code == VMEXIT_IOIO) {
  38     struct svm_io_info * io_info = (struct svm_io_info *)&(guest_ctrl->exit_info1);
  39
  40     if (io_info->type == 0) {
  41       if (io_info->str) {
  42         handle_svm_io_outs(info);
  43       } else {
  44         handle_svm_io_out(info);
  45       }
  46     } else {
  47       if (io_info->str) {
  48         handle_svm_io_ins(info);
  49       } else {
  50         handle_svm_io_in(info);
  51       }
  52     }
  53   } else if (exit_code == VMEXIT_CR0_WRITE) {
  54     PrintDebug("CR0 Write\n");
  55
  56     if (handle_cr0_write(info) == -1) {
  57       return -1;
  58     }
  59     /*
  60   } else if (( (exit_code == VMEXIT_CR3_READ)  ||
  61                (exit_code == VMEXIT_CR3_WRITE) ||
  62                (exit_code == VMEXIT_INVLPG)    ||
  63                (exit_code == VMEXIT_INVLPGA)   ||
  64                (exit_code == VMEXIT_EXCP14)) &&
  65              (info->page_mode == SHADOW_PAGING)) {
  66     handle_shadow_paging(info);
  67     */
  68   } else {
  69     addr_t rip_addr = get_addr_linear(info, guest_state->rip, guest_state->cs.selector);
  70     char buf[15];
  71     addr_t host_addr;
  72
  73
  74     PrintDebug("SVM Returned:(VMCB=%x)\n", info->vmm_data);
  75     PrintDebug("RIP: %x\n", guest_state->rip);
  76     PrintDebug("RIP Linear: %x\n", rip_addr);
  77
  78     PrintDebug("SVM Returned: Exit Code: %x\n",exit_code);
  79
  80     PrintDebug("io_info1 low = 0x%.8x\n", *(uint_t*)&(guest_ctrl->exit_info1));
  81     PrintDebug("io_info1 high = 0x%.8x\n", *(uint_t *)(((uchar_t *)&(guest_ctrl->exit_info1)) + 4));
  82
  83     PrintDebug("io_info2 low = 0x%.8x\n", *(uint_t*)&(guest_ctrl->exit_info2));
  84     PrintDebug("io_info2 high = 0x%.8x\n", *(uint_t *)(((uchar_t *)&(guest_ctrl->exit_info2)) + 4));
  85
  86
  87
  88     if (guest_pa_to_host_pa(info, guest_state->rip, &host_addr) == -1) {
  89       PrintDebug("Could not translate guest_state->rip to host address\n");
  90       return -1;
  91     }
  92
  93     PrintDebug("Host Address of rip = 0x%x\n", host_addr);
  94
  95     memset(buf, 0, 15);
  96
  97     PrintDebug("Reading from 0x%x in guest\n", rip_addr);
  98
  99     read_guest_pa_memory(info, rip_addr, 15, buf);
 100
 101     PrintTraceMemDump(buf, 15);
 102
 103     while(1);
 104
 105   }
 106
 107
 108   // Update the low level state
 109
 110   if (intr_pending(&(info->intr_state))) {
 111     guest_ctrl->EVENTINJ.vector = get_intr_number(&(info->intr_state));
 112     guest_ctrl->EVENTINJ.valid = 1;
 113
 114     switch (get_intr_type(&(info->intr_state))) {
 115     case EXTERNAL_IRQ:
 116       guest_ctrl->EVENTINJ.type = SVM_INJECTION_EXTERNAL_INTR;
 117       break;
 118     case NMI:
 119       guest_ctrl->EVENTINJ.type = SVM_INJECTION_NMI;
 120       break;
 121     case EXCEPTION:
 122       guest_ctrl->EVENTINJ.type = SVM_INJECTION_EXCEPTION;
 123       guest_ctrl->EVENTINJ.excp_error_code = info->intr_state.excp_error_code;
 124       break;
 125     case SOFTWARE:
 126       guest_ctrl->EVENTINJ.type = SVM_INJECTION_SOFT_INTR;
 127       break;
 128     case VIRTUAL:
 129       guest_ctrl->EVENTINJ.type = SVM_INJECTION_VIRTUAL_INTR;
 130       break;
 131
 132     case INVALID_INTR:
 133     default:
 134       PrintDebug("Attempted to issue an invalid interrupt\n");
 135       return -1;
 136     }
 137
 138     // IMPORTANT TODO
 139     // We need to figure out stack parameters....
 140
 141     //EVENTINJ.error_code
 142
 143   }
 144
 145   guest_state->rax = info->vm_regs.rax;
 146   guest_state->rip = info->rip;
 147   guest_state->rsp = info->vm_regs.rsp;
 148
 149   return 0;
 150 }
 151
 152
 153
 154
 155 int handle_shadow_paging(struct guest_info * info) {
 156   vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
 157   //  vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA((vmcb_t*)(info->vmm_data));
 158
 159   if (guest_ctrl->exit_code == VMEXIT_CR3_READ) {
 160
 161   }
 162
 163   return 0;
 164 }
 165
 166
 167