LXR linux/include/xen/xen.h

   1#ifndef _XEN_XEN_H
   2#define _XEN_XEN_H
   3
   4enum xen_domain_type {
   5        XEN_NATIVE,             /* running on bare hardware    */
   6        XEN_PV_DOMAIN,          /* running in a PV domain      */
   7        XEN_HVM_DOMAIN,         /* running in a Xen hvm domain */
   8};
   9
  10#ifdef CONFIG_XEN
  11extern enum xen_domain_type xen_domain_type;
  12#else
  13#define xen_domain_type         XEN_NATIVE
  14#endif
  15
  16#define xen_domain()            (xen_domain_type != XEN_NATIVE)
  17#define xen_pv_domain()         (xen_domain() &&                        \
  18                                 xen_domain_type == XEN_PV_DOMAIN)
  19#define xen_hvm_domain()        (xen_domain() &&                        \
  20                                 xen_domain_type == XEN_HVM_DOMAIN)
  21
  22#ifdef CONFIG_XEN_DOM0
  23#include <xen/interface/xen.h>
  24#include <asm/xen/hypervisor.h>
  25
  26#define xen_initial_domain()    (xen_domain() && \
  27                                 xen_start_info && xen_start_info->flags & SIF_INITDOMAIN)
  28#else  /* !CONFIG_XEN_DOM0 */
  29#define xen_initial_domain()    (0)
  30#endif  /* CONFIG_XEN_DOM0 */
  31
  32#ifdef CONFIG_XEN_PVH
  33/* This functionality exists only for x86. The XEN_PVHVM support exists
  34 * only in x86 world - hence on ARM it will be always disabled.
  35 * N.B. ARM guests are neither PV nor HVM nor PVHVM.
  36 * It's a bit like PVH but is different also (it's further towards the H
  37 * end of the spectrum than even PVH).
  38 */
  39#include <xen/features.h>
  40#define xen_pvh_domain() (xen_pv_domain() && \
  41                          xen_feature(XENFEAT_auto_translated_physmap) && \
  42                          xen_have_vector_callback)
  43#else
  44#define xen_pvh_domain()        (0)
  45#endif
  46#endif  /* _XEN_XEN_H */
  47