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 = &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) {
  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   } else {
  43     return -1;
  44   }
  45
  46   return 0;
  47 }
  48
  49 int raise_exception(struct guest_info * info, uint_t excp) {
  50   struct vm_intr * intr_state = &(info->intr_state);
  51
  52   if (intr_state->excp_pending == 0) {
  53     intr_state->excp_pending = 1;
  54     intr_state->excp_num = excp;
  55     intr_state->excp_error_code = 0;
  56     intr_state->excp_error_code_valid = 0;
  57   } else {
  58     return -1;
  59   }
  60
  61   return 0;
  62 }
  63
  64
  65 int raise_irq(struct guest_info * info, int irq, int error_code) {
  66   // Look up PIC and resend
  67   V3_ASSERT(info);
  68   V3_ASSERT(info->intr_state.controller);
  69   V3_ASSERT(info->intr_state.controller->raise_intr);
  70
  71   //  if ((info->intr_state.controller) &&
  72   //  (info->intr_state.controller->raise_intr)) {
  73     info->intr_state.controller->raise_intr(info->intr_state.controller_state, irq, error_code);
  74     //} else {
  75     // PrintDebug("There is no registered Interrupt Controller... (NULL POINTER)\n");
  76     // return -1;
  77     //}
  78   return 0;
  79 }
  80
  81
  82
  83
  84
  85
  86
  87
  88
  89
  90
  91 int intr_pending(struct guest_info * info) {
  92   struct vm_intr * intr_state = &(info->intr_state);
  93
  94   if (intr_state->excp_pending) {
  95     return 1;
  96   } else if (intr_state->controller->intr_pending(intr_state->controller_state)) {
  97     return 1;
  98   }
  99
 100   /* Check [A]PIC */
 101
 102   return 0;
 103 }
 104
 105
 106 uint_t get_intr_number(struct guest_info * info) {
 107   struct vm_intr * intr_state = &(info->intr_state);
 108
 109   if (intr_state->excp_pending) {
 110     return intr_state->excp_num;
 111   } else if (intr_state->controller->intr_pending(intr_state->controller_state)) {
 112     return intr_state->controller->get_intr_number(intr_state->controller_state);
 113   }
 114
 115   /* someway to get the [A]PIC intr */
 116
 117   return 0;
 118 }
 119
 120
 121 intr_type_t get_intr_type(struct guest_info * info) {
 122  struct vm_intr * intr_state = &(info->intr_state);
 123
 124   if (intr_state->excp_pending) {
 125     return EXCEPTION;
 126   } else if (intr_state->controller->intr_pending(intr_state->controller_state)) {
 127     return EXTERNAL_IRQ;
 128   }
 129
 130   return INVALID_INTR;
 131 }
 132
 133
 134
 135
 136
 137
 138 int injecting_intr(struct guest_info * info, uint_t intr_num, intr_type_t type) {
 139   struct vm_intr * intr_state = &(info->intr_state);
 140
 141   if (type == EXCEPTION) {
 142
 143     intr_state->excp_pending = 0;
 144     intr_state->excp_num = 0;
 145     intr_state->excp_error_code = 0;
 146     intr_state->excp_error_code_valid = 0;
 147
 148   } else if (type == EXTERNAL_IRQ) {
 149     return intr_state->controller->begin_irq(intr_state->controller_state, intr_num);
 150   }
 151
 152   return 0;
 153 }