include/xen/xen.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _XEN_XEN_H
   3 #define _XEN_XEN_H
   4
   5 enum xen_domain_type {
   6         XEN_NATIVE,             /* running on bare hardware    */
   7         XEN_PV_DOMAIN,          /* running in a PV domain      */
   8         XEN_HVM_DOMAIN,         /* running in a Xen hvm domain */
   9 };
  10
  11 #ifdef CONFIG_XEN
  12 extern enum xen_domain_type xen_domain_type;
  13 #else
  14 #define xen_domain_type         XEN_NATIVE
  15 #endif
  16
  17 #ifdef CONFIG_XEN_PVH
  18 extern bool xen_pvh;
  19 #else
  20 #define xen_pvh                 0
  21 #endif
  22
  23 #define xen_domain()            (xen_domain_type != XEN_NATIVE)
  24 #define xen_pv_domain()         (xen_domain_type == XEN_PV_DOMAIN)
  25 #define xen_hvm_domain()        (xen_domain_type == XEN_HVM_DOMAIN)
  26 #define xen_pvh_domain()        (xen_pvh)
  27
  28 #include <linux/types.h>
  29
  30 extern uint32_t xen_start_flags;
  31
  32 #include <xen/interface/hvm/start_info.h>
  33 extern struct hvm_start_info pvh_start_info;
  34
  35 #ifdef CONFIG_XEN_DOM0
  36 #include <xen/interface/xen.h>
  37 #include <asm/xen/hypervisor.h>
  38
  39 #define xen_initial_domain()    (xen_domain() && \
  40                                  (xen_start_flags & SIF_INITDOMAIN))
  41 #else  /* !CONFIG_XEN_DOM0 */
  42 #define xen_initial_domain()    (0)
  43 #endif  /* CONFIG_XEN_DOM0 */
  44
  45 struct bio_vec;
  46 struct page;
  47
  48 bool xen_biovec_phys_mergeable(const struct bio_vec *vec1,
  49                 const struct page *page);
  50
  51 #if defined(CONFIG_MEMORY_HOTPLUG) && defined(CONFIG_XEN_BALLOON)
  52 extern u64 xen_saved_max_mem_size;
  53 #endif
  54
  55 #ifdef CONFIG_XEN_UNPOPULATED_ALLOC
  56 int xen_alloc_unpopulated_pages(unsigned int nr_pages, struct page **pages);
  57 void xen_free_unpopulated_pages(unsigned int nr_pages, struct page **pages);
  58 #else
  59 #define xen_alloc_unpopulated_pages alloc_xenballooned_pages
  60 #define xen_free_unpopulated_pages free_xenballooned_pages
  61 #include <xen/balloon.h>
  62 #endif
  63
  64 #endif  /* _XEN_XEN_H */