sys/xen/xenhvm_mod.c

   1 #include <sys/cdefs.h>
   2 __FBSDID("$FreeBSD$");
   3
   4 #include <sys/param.h>
   5 #include <sys/kernel.h>
   6 #include <sys/module.h>
   7 #include <sys/systm.h>
   8
   9 static int
  10 xenhvm_modevent(module_t mod, int type, void *arg)
  11 {
  12
  13         switch (type) {
  14         case MOD_LOAD:
  15                 if (inw(0x10) == 0x49d2) {
  16                         if (bootverbose)
  17                                 printf("Xen detected: disabling emulated block and network devices\n");
  18                         outw(0x10, 3);
  19                 }
  20                 return (0);
  21         }
  22
  23         return (EOPNOTSUPP);
  24 }
  25
  26 static moduledata_t xenhvm_mod = {
  27         "xenhvm",
  28         xenhvm_modevent,
  29         0
  30 };
  31
  32 DECLARE_MODULE(xenhvm, xenhvm_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);