6/sys/xen/features.c

   1 #include <sys/cdefs.h>
   2 __FBSDID("$FreeBSD$");
   3
   4 #include <sys/types.h>
   5 #include <machine/xen/xen-os.h>
   6 #include <machine/xen/hypervisor.h>
   7 #include <machine/xen/features.h>
   8
   9 uint8_t xen_features[XENFEAT_NR_SUBMAPS * 32] /* __read_mostly */;
  10
  11 void
  12 setup_xen_features(void)
  13 {
  14         xen_feature_info_t fi;
  15         int i, j;
  16
  17         for (i = 0; i < XENFEAT_NR_SUBMAPS; i++) {
  18                 fi.submap_idx = i;
  19                 if (HYPERVISOR_xen_version(XENVER_get_features, &fi) < 0)
  20                         break;
  21                 for (j = 0; j < 32; j++)
  22                         xen_features[i*32 + j] = !!(fi.submap & 1<<j);
  23         }
  24 }