sys/xen/features.c

   1 #include <sys/cdefs.h>
   2 __FBSDID("$FreeBSD$");
   3
   4 #include <sys/param.h>
   5 #include <sys/systm.h>
   6
   7 #include <machine/xen/xen-os.h>
   8 #include <xen/hypervisor.h>
   9 #include <xen/features.h>
  10
  11 uint8_t xen_features[XENFEAT_NR_SUBMAPS * 32] /* __read_mostly */;
  12
  13 void
  14 setup_xen_features(void)
  15 {
  16         xen_feature_info_t fi;
  17         int i, j;
  18
  19         for (i = 0; i < XENFEAT_NR_SUBMAPS; i++) {
  20                 fi.submap_idx = i;
  21                 if (HYPERVISOR_xen_version(XENVER_get_features, &fi) < 0)
  22                         break;
  23                 for (j = 0; j < 32; j++)
  24                         xen_features[i*32 + j] = !!(fi.submap & 1<<j);
  25         }
  26 }