palacios/src/palacios/vmm_intr.c

   1 #include <palacios/vmm_intr.h>
   2 #include <palacios/vmm.h>
   3
   4 #include <palacios/vm_guest.h>
   5
   6
   7 void init_interrupt_state(struct guest_info * info) {
   8   info->intr_state.excp_pending = 0;
   9   info->intr_state.excp_num = 0;
  10   info->intr_state.excp_error_code = 0;
  11
  12   info->vm_ops.raise_irq = &v3_raise_irq;
  13 }
  14
  15 void set_intr_controller(struct guest_info * info, struct intr_ctrl_ops * ops, void * state) {
  16   info->intr_state.controller = ops;
  17   info->intr_state.controller_state = state;
  18 }
  19
  20
  21
  22
  23
  24
  25
  26
  27
  28 int hook_irq(struct guest_info * info, int irq) {
  29   extern struct vmm_os_hooks * os_hooks;
  30
  31   return os_hooks->hook_interrupt(info, irq);
  32 }
  33
  34 int raise_exception_with_error(struct guest_info * info, uint_t excp, uint_t error_code) {
  35   struct vm_intr * intr_state = &(info->intr_state);
  36
  37   if (intr_state->excp_pending == 0) {
  38     intr_state->excp_pending = 1;
  39     intr_state->excp_num = excp;
  40     intr_state->excp_error_code = error_code;
  41     intr_state->excp_error_code_valid = 1;
  42     PrintDebug("Raising exception with error code: %x\n", error_code);
  43   } else {
  44     PrintDebug("exception already pending, currently not implemented\n");
  45     return -1;
  46   }
  47
  48   return 0;
  49 }
  50
  51 int raise_exception(struct guest_info * info, uint_t excp) {
  52   struct vm_intr * intr_state = &(info->intr_state);
  53
  54   if (intr_state->excp_pending == 0) {
  55     intr_state->excp_pending = 1;
  56     intr_state->excp_num = excp;
  57     intr_state->excp_error_code = 0;
  58     intr_state->excp_error_code_valid = 0;
  59   } else {
  60     PrintDebug("exception already pending, currently not implemented\n");
  61     return -1;
  62   }
  63
  64   return 0;
  65 }
  66
  67
  68 int v3_raise_irq(struct guest_info * info, int irq) {
  69   // Look up PIC and resend
  70   V3_ASSERT(info);
  71   V3_ASSERT(info->intr_state.controller);
  72   V3_ASSERT(info->intr_state.controller->raise_intr);
  73
  74   //  if ((info->intr_state.controller) &&
  75   //  (info->intr_state.controller->raise_intr)) {
  76     info->intr_state.controller->raise_intr(info->intr_state.controller_state, irq);
  77     //} else {
  78     // PrintDebug("There is no registered Interrupt Controller... (NULL POINTER)\n");
  79     // return -1;
  80     //}
  81   return 0;
  82 }
  83
  84
  85
  86
  87
  88
  89
  90
  91
  92
  93
  94 int intr_pending(struct guest_info * info) {
  95   struct vm_intr * intr_state = &(info->intr_state);
  96
  97   if (intr_state->excp_pending == 1) {
  98     return 1;
  99   } else if (intr_state->controller->intr_pending(intr_state->controller_state) == 1) {
 100     return 1;
 101   }
 102
 103   /* Check [A]PIC */
 104
 105   return 0;
 106 }
 107
 108
 109 uint_t get_intr_number(struct guest_info * info) {
 110   struct vm_intr * intr_state = &(info->intr_state);
 111
 112   if (intr_state->excp_pending == 1) {
 113     return intr_state->excp_num;
 114   } else if (intr_state->controller->intr_pending(intr_state->controller_state)) {
 115     return intr_state->controller->get_intr_number(intr_state->controller_state);
 116   }
 117
 118   /* someway to get the [A]PIC intr */
 119
 120   return 0;
 121 }
 122
 123
 124 intr_type_t get_intr_type(struct guest_info * info) {
 125  struct vm_intr * intr_state = &(info->intr_state);
 126
 127   if (intr_state->excp_pending) {
 128     return EXCEPTION;
 129   } else if (intr_state->controller->intr_pending(intr_state->controller_state)) {
 130     return EXTERNAL_IRQ;
 131   }
 132
 133   return INVALID_INTR;
 134 }
 135
 136
 137
 138
 139
 140
 141 int injecting_intr(struct guest_info * info, uint_t intr_num, intr_type_t type) {
 142   struct vm_intr * intr_state = &(info->intr_state);
 143
 144   if (type == EXCEPTION) {
 145
 146     intr_state->excp_pending = 0;
 147     intr_state->excp_num = 0;
 148     intr_state->excp_error_code = 0;
 149     intr_state->excp_error_code_valid = 0;
 150
 151   } else if (type == EXTERNAL_IRQ) {
 152     return intr_state->controller->begin_irq(intr_state->controller_state, intr_num);
 153   }
 154
 155   return 0;
 156 }