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
  64   } else if (exit_code == VMEXIT_INTR) {
  65     handle_svm_intr(info);
  66   } else {
  67     addr_t rip_addr = get_addr_linear(info, guest_state->rip, guest_state->cs.selector);
  68     char buf[15];
  69     addr_t host_addr;
  70
  71
  72     PrintDebug("SVM Returned:(VMCB=%x)\n", info->vmm_data);
  73     PrintDebug("RIP: %x\n", guest_state->rip);
  74     PrintDebug("RIP Linear: %x\n", rip_addr);
  75
  76     PrintDebug("SVM Returned: Exit Code: %x\n",exit_code);
  77
  78     PrintDebug("io_info1 low = 0x%.8x\n", *(uint_t*)&(guest_ctrl->exit_info1));
  79     PrintDebug("io_info1 high = 0x%.8x\n", *(uint_t *)(((uchar_t *)&(guest_ctrl->exit_info1)) + 4));
  80
  81     PrintDebug("io_info2 low = 0x%.8x\n", *(uint_t*)&(guest_ctrl->exit_info2));
  82     PrintDebug("io_info2 high = 0x%.8x\n", *(uint_t *)(((uchar_t *)&(guest_ctrl->exit_info2)) + 4));
  83
  84
  85
  86     if (guest_pa_to_host_pa(info, guest_state->rip, &host_addr) == -1) {
  87       PrintDebug("Could not translate guest_state->rip to host address\n");
  88       return -1;
  89     }
  90
  91     PrintDebug("Host Address of rip = 0x%x\n", host_addr);
  92
  93     memset(buf, 0, 15);
  94
  95     PrintDebug("Reading from 0x%x in guest\n", rip_addr);
  96
  97     read_guest_pa_memory(info, rip_addr, 15, buf);
  98
  99     PrintTraceMemDump(buf, 15);
 100
 101     while(1);
 102
 103   }
 104
 105
 106   // Update the low level state
 107
 108   if (intr_pending(&(info->intr_state))) {
 109     guest_ctrl->EVENTINJ.vector = get_intr_number(&(info->intr_state));
 110     guest_ctrl->EVENTINJ.valid = 1;
 111
 112     switch (get_intr_type(&(info->intr_state))) {
 113     case EXTERNAL_IRQ:
 114       guest_ctrl->EVENTINJ.type = SVM_INJECTION_EXTERNAL_INTR;
 115       break;
 116     case NMI:
 117       guest_ctrl->EVENTINJ.type = SVM_INJECTION_NMI;
 118       break;
 119     case EXCEPTION:
 120       guest_ctrl->EVENTINJ.type = SVM_INJECTION_EXCEPTION;
 121       guest_ctrl->EVENTINJ.error_code = info->intr_state.excp_error_code;
 122       break;
 123     case SOFTWARE:
 124       guest_ctrl->EVENTINJ.type = SVM_INJECTION_SOFT_INTR;
 125       break;
 126     case VIRTUAL:
 127       guest_ctrl->EVENTINJ.type = SVM_INJECTION_VIRTUAL_INTR;
 128       break;
 129
 130     case INVALID_INTR:
 131     default:
 132       PrintDebug("Attempted to issue an invalid interrupt\n");
 133       return -1;
 134     }
 135
 136     // IMPORTANT TODO
 137     // We need to figure out stack parameters....
 138
 139     //EVENTINJ.error_code
 140
 141   }
 142
 143   guest_state->rax = info->vm_regs.rax;
 144   guest_state->rip = info->rip;
 145   guest_state->rsp = info->vm_regs.rsp;
 146
 147   return 0;
 148 }
 149
 150
 151
 152
 153 int handle_shadow_paging(struct guest_info * info) {
 154   vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
 155   //  vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA((vmcb_t*)(info->vmm_data));
 156
 157   if (guest_ctrl->exit_code == VMEXIT_CR3_READ) {
 158
 159   }
 160
 161   return 0;
 162 }
 163
 164
 165
 166 int handle_svm_intr(struct guest_info * info) {
 167   vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
 168   // vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA((vmcb_t*)(info->vmm_data));
 169
 170   //struct Interrupt_Info * int_info = &(guest_ctrl->exit_int_info);
 171
 172   //struct vmm_irq_hook * get_irq_hook(&(info->irq_map), int_info->vector);
 173
 174   PrintDebug("SVM Returned: Exit Code: %x\n",guest_ctrl->exit_code);
 175   PrintDebug("V_INTR_VECTOR: 0x%x\n", guest_ctrl->guest_ctrl.V_INTR_VECTOR);
 176
 177
 178
 179
 180   while(1);
 181
 182
 183
 184
 185
 186
 187
 188
 189
 190   return 0;
 191 }