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   PrintDebug("SVM Returned: Exit Code: %x\n",exit_code);
  31   // PrintDebugVMCB((vmcb_t*)(info->vmm_data));
  32
  33
  34   // PrintDebug("SVM Returned:(VMCB=%x)\n", info->vmm_data);
  35   //PrintDebug("RIP: %x\n", guest_state->rip);
  36
  37
  38   //PrintDebug("SVM Returned: Exit Code: %x\n",exit_code);
  39
  40   if (exit_code == VMEXIT_IOIO) {
  41     struct svm_io_info * io_info = (struct svm_io_info *)&(guest_ctrl->exit_info1);
  42
  43     if (io_info->type == 0) {
  44       if (io_info->str) {
  45         if (handle_svm_io_outs(info) == -1 ) {
  46           return -1;
  47         }
  48       } else {
  49         if (handle_svm_io_out(info) == -1) {
  50           return -1;
  51         }
  52       }
  53     } else {
  54       if (io_info->str) {
  55         if (handle_svm_io_ins(info) == -1) {
  56           return -1;
  57         }
  58       } else {
  59         if (handle_svm_io_in(info) == -1) {
  60           return -1;
  61         }
  62       }
  63     }
  64   } else if (exit_code == VMEXIT_CR0_WRITE) {
  65     PrintDebug("CR0 Write\n");
  66
  67     if (handle_cr0_write(info) == -1) {
  68       return -1;
  69     }
  70   } else if (exit_code == VMEXIT_CR0_READ) {
  71     PrintDebug("CR0 Read\n");
  72
  73     if (handle_cr0_read(info) == -1) {
  74       return -1;
  75     }
  76
  77
  78     /*
  79   } else if (( (exit_code == VMEXIT_CR3_READ)  ||
  80                (exit_code == VMEXIT_CR3_WRITE) ||
  81                (exit_code == VMEXIT_INVLPG)    ||
  82                (exit_code == VMEXIT_INVLPGA)   ||
  83                (exit_code == VMEXIT_EXCP14)) &&
  84              (info->page_mode == SHADOW_PAGING)) {
  85     handle_shadow_paging(info);
  86     */
  87
  88   } else if (exit_code == VMEXIT_INTR) {
  89
  90     //    handle_svm_intr(info);
  91
  92   } else if (exit_code == VMEXIT_HLT) {
  93     PrintDebug("Guest halted\n");
  94     return -1;
  95   } else {
  96     addr_t rip_addr;
  97     char buf[15];
  98     addr_t host_addr;
  99
 100     if (info->cpu_mode == REAL) {
 101       rip_addr = get_addr_linear(info, guest_state->rip, guest_state->cs.selector);
 102     } else {
 103       rip_addr = get_addr_linear(info, guest_state->rip, guest_state->cs.base);
 104     }
 105
 106
 107     PrintDebug("SVM Returned:(VMCB=%x)\n", info->vmm_data);
 108     PrintDebug("RIP: %x\n", guest_state->rip);
 109     PrintDebug("RIP Linear: %x\n", rip_addr);
 110
 111     PrintDebug("SVM Returned: Exit Code: %x\n",exit_code);
 112
 113     PrintDebug("io_info1 low = 0x%.8x\n", *(uint_t*)&(guest_ctrl->exit_info1));
 114     PrintDebug("io_info1 high = 0x%.8x\n", *(uint_t *)(((uchar_t *)&(guest_ctrl->exit_info1)) + 4));
 115
 116     PrintDebug("io_info2 low = 0x%.8x\n", *(uint_t*)&(guest_ctrl->exit_info2));
 117     PrintDebug("io_info2 high = 0x%.8x\n", *(uint_t *)(((uchar_t *)&(guest_ctrl->exit_info2)) + 4));
 118
 119
 120
 121     if (guest_pa_to_host_pa(info, guest_state->rip, &host_addr) == -1) {
 122       PrintDebug("Could not translate guest_state->rip to host address\n");
 123       return -1;
 124     }
 125
 126     PrintDebug("Host Address of rip = 0x%x\n", host_addr);
 127
 128     memset(buf, 0, 15);
 129
 130     PrintDebug("Reading from 0x%x in guest\n", rip_addr);
 131
 132     read_guest_pa_memory(info, rip_addr, 15, buf);
 133
 134     PrintTraceMemDump(buf, 15);
 135
 136     while(1);
 137
 138   }
 139
 140
 141   // Update the low level state
 142
 143   if (intr_pending(&(info->intr_state))) {
 144
 145     switch (get_intr_type(&(info->intr_state))) {
 146     case EXTERNAL_IRQ:
 147       guest_ctrl->EVENTINJ.vector = get_intr_number(&(info->intr_state));
 148       guest_ctrl->EVENTINJ.valid = 1;
 149       guest_ctrl->EVENTINJ.type = SVM_INJECTION_EXTERNAL_INTR;
 150
 151       break;
 152     case NMI:
 153       guest_ctrl->EVENTINJ.type = SVM_INJECTION_NMI;
 154       break;
 155     case EXCEPTION:
 156       guest_ctrl->EVENTINJ.type = SVM_INJECTION_EXCEPTION;
 157       guest_ctrl->EVENTINJ.error_code = info->intr_state.excp_error_code;
 158       break;
 159     case SOFTWARE:
 160       guest_ctrl->EVENTINJ.type = SVM_INJECTION_SOFT_INTR;
 161       break;
 162     case VIRTUAL:
 163       guest_ctrl->EVENTINJ.type = SVM_INJECTION_VIRTUAL_INTR;
 164       break;
 165
 166     case INVALID_INTR:
 167     default:
 168       PrintDebug("Attempted to issue an invalid interrupt\n");
 169       return -1;
 170     }
 171
 172
 173     PrintDebug("Injecting Interrupt %d (EIP=%x)\n", guest_ctrl->EVENTINJ.vector, info->rip);
 174
 175
 176     // IMPORTANT TODO
 177     // We need to figure out stack parameters....
 178
 179     //EVENTINJ.error_code
 180
 181   }
 182
 183
 184
 185   guest_state->rax = info->vm_regs.rax;
 186   guest_state->rip = info->rip;
 187   guest_state->rsp = info->vm_regs.rsp;
 188
 189   if (exit_code == VMEXIT_INTR) {
 190     PrintDebug("INTR ret IP = %x\n", guest_state->rip);
 191   }
 192
 193   return 0;
 194 }
 195
 196
 197
 198
 199 int handle_shadow_paging(struct guest_info * info) {
 200   vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
 201   //  vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA((vmcb_t*)(info->vmm_data));
 202
 203   if (guest_ctrl->exit_code == VMEXIT_CR3_READ) {
 204
 205   }
 206
 207   return 0;
 208 }
 209
 210
 211
 212 int handle_svm_intr(struct guest_info * info) {
 213   vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
 214   // vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA((vmcb_t*)(info->vmm_data));
 215
 216   //struct Interrupt_Info * int_info = &(guest_ctrl->exit_int_info);
 217
 218   //struct vmm_irq_hook * get_irq_hook(&(info->irq_map), int_info->vector);
 219
 220   PrintDebug("SVM Returned: Exit Code: %x\n",guest_ctrl->exit_code);
 221   PrintDebug("V_INTR_VECTOR: 0x%x\n", guest_ctrl->guest_ctrl.V_INTR_VECTOR);
 222
 223   while(1);
 224
 225   return 0;
 226 }