1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _XEN_XEN_H
3#define _XEN_XEN_H
4
5#include <linux/types.h>
6
7enum xen_domain_type {
8 XEN_NATIVE, /* running on bare hardware */
9 XEN_PV_DOMAIN, /* running in a PV domain */
10 XEN_HVM_DOMAIN, /* running in a Xen hvm domain */
11};
12
13#ifdef CONFIG_XEN
14extern enum xen_domain_type xen_domain_type;
15#else
16#define xen_domain_type XEN_NATIVE
17#endif
18
19#ifdef CONFIG_XEN_PVH
20extern bool xen_pvh;
21#else
22#define xen_pvh 0
23#endif
24
25#define xen_domain() (xen_domain_type != XEN_NATIVE)
26#define xen_pv_domain() (xen_domain_type == XEN_PV_DOMAIN)
27#define xen_hvm_domain() (xen_domain_type == XEN_HVM_DOMAIN)
28#define xen_pvh_domain() (xen_pvh)
29
30extern uint32_t xen_start_flags;
31
32#ifdef CONFIG_XEN_PV
33extern bool xen_pv_pci_possible;
34#else
35#define xen_pv_pci_possible 0
36#endif
37
38#include <xen/interface/hvm/start_info.h>
39extern struct hvm_start_info pvh_start_info;
40void xen_prepare_pvh(void);
41struct pt_regs;
42void xen_pv_evtchn_do_upcall(struct pt_regs *regs);
43
44#ifdef CONFIG_XEN_DOM0
45#include <xen/interface/xen.h>
46#include <asm/xen/hypervisor.h>
47
48#define xen_initial_domain() (xen_domain() && \
49 (xen_start_flags & SIF_INITDOMAIN))
50#else /* !CONFIG_XEN_DOM0 */
51#define xen_initial_domain() (0)
52#endif /* CONFIG_XEN_DOM0 */
53
54struct bio_vec;
55struct page;
56
57bool xen_biovec_phys_mergeable(const struct bio_vec *vec1,
58 const struct page *page);
59
60#if defined(CONFIG_MEMORY_HOTPLUG) && defined(CONFIG_XEN_BALLOON)
61extern u64 xen_saved_max_mem_size;
62#endif
63
64#ifdef CONFIG_XEN_UNPOPULATED_ALLOC
65int xen_alloc_unpopulated_pages(unsigned int nr_pages, struct page **pages);
66void xen_free_unpopulated_pages(unsigned int nr_pages, struct page **pages);
67#include <linux/ioport.h>
68int arch_xen_unpopulated_init(struct resource **res);
69#else
70#include <xen/balloon.h>
71static inline int xen_alloc_unpopulated_pages(unsigned int nr_pages,
72 struct page **pages)
73{
74 return xen_alloc_ballooned_pages(nr_pages, pages);
75}
76static inline void xen_free_unpopulated_pages(unsigned int nr_pages,
77 struct page **pages)
78{
79 xen_free_ballooned_pages(nr_pages, pages);
80}
81#endif
82
83#if defined(CONFIG_XEN_DOM0) && defined(CONFIG_ACPI) && defined(CONFIG_X86)
84bool __init xen_processor_present(uint32_t acpi_id);
85#else
86#include <linux/bug.h>
87static inline bool xen_processor_present(uint32_t acpi_id)
88{
89 BUG();
90 return false;
91}
92#endif
93
94#endif /* _XEN_XEN_H */
95

source code of linux/include/xen/xen.h