root/include/xen/xen.h

INCLUDED FROM

#ifndef _XEN_XEN_H
#define _XEN_XEN_H

enum xen_domain_type {
        XEN_NATIVE,             /* running on bare hardware    */
        XEN_PV_DOMAIN,          /* running in a PV domain      */
        XEN_HVM_DOMAIN,         /* running in a Xen hvm domain */
};

#ifdef CONFIG_XEN
extern enum xen_domain_type xen_domain_type;
#else
#define xen_domain_type         XEN_NATIVE
#endif

#define xen_domain()            (xen_domain_type != XEN_NATIVE)
#define xen_pv_domain()         (xen_domain() &&                        \
                                 xen_domain_type == XEN_PV_DOMAIN)
#define xen_hvm_domain()        (xen_domain() &&                        \
                                 xen_domain_type == XEN_HVM_DOMAIN)

#ifdef CONFIG_XEN_DOM0
#include <xen/interface/xen.h>
#include <asm/xen/hypervisor.h>

#define xen_initial_domain()    (xen_domain() && \
                                 xen_start_info && xen_start_info->flags & SIF_INITDOMAIN)
#else  /* !CONFIG_XEN_DOM0 */
#define xen_initial_domain()    (0)
#endif  /* CONFIG_XEN_DOM0 */

#ifdef CONFIG_XEN_PVH
/* This functionality exists only for x86. The XEN_PVHVM support exists
 * only in x86 world - hence on ARM it will be always disabled.
 * N.B. ARM guests are neither PV nor HVM nor PVHVM.
 * It's a bit like PVH but is different also (it's further towards the H
 * end of the spectrum than even PVH).
 */
#include <xen/features.h>
#define xen_pvh_domain() (xen_pv_domain() && \
                          xen_feature(XENFEAT_auto_translated_physmap) && \
                          xen_have_vector_callback)
#else
#define xen_pvh_domain()        (0)
#endif
#endif  /* _XEN_XEN_H */