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#ifdef CONFIG_X86
26#include <asm/cpufeature.h>
27
28#define xen_pv_domain() (cpu_feature_enabled(X86_FEATURE_XENPV))
29#else
30#define xen_pv_domain() 0
31#endif
32
33#define xen_domain() (xen_domain_type != XEN_NATIVE)
34#define xen_hvm_domain() (xen_domain_type == XEN_HVM_DOMAIN)
35#define xen_pvh_domain() (xen_pvh)
36
37extern uint32_t xen_start_flags;
38
39#ifdef CONFIG_XEN_PV
40extern bool xen_pv_pci_possible;
41#else
42#define xen_pv_pci_possible 0
43#endif
44
45#include <xen/interface/hvm/start_info.h>
46extern struct hvm_start_info pvh_start_info;
47void xen_prepare_pvh(void);
48struct pt_regs;
49void xen_pv_evtchn_do_upcall(struct pt_regs *regs);
50
51#ifdef CONFIG_XEN_DOM0
52#include <xen/interface/xen.h>
53#include <asm/xen/hypervisor.h>
54
55#define xen_initial_domain() (xen_domain() && \
56 (xen_start_flags & SIF_INITDOMAIN))
57#else /* !CONFIG_XEN_DOM0 */
58#define xen_initial_domain() (0)
59#endif /* CONFIG_XEN_DOM0 */
60
61struct bio_vec;
62struct page;
63
64bool xen_biovec_phys_mergeable(const struct bio_vec *vec1,
65 const struct page *page);
66
67#if defined(CONFIG_MEMORY_HOTPLUG) && defined(CONFIG_XEN_BALLOON)
68extern u64 xen_saved_max_mem_size;
69#endif
70
71#ifdef CONFIG_XEN_UNPOPULATED_ALLOC
72int xen_alloc_unpopulated_pages(unsigned int nr_pages, struct page **pages);
73void xen_free_unpopulated_pages(unsigned int nr_pages, struct page **pages);
74#include <linux/ioport.h>
75int arch_xen_unpopulated_init(struct resource **res);
76#else
77#include <xen/balloon.h>
78static inline int xen_alloc_unpopulated_pages(unsigned int nr_pages,
79 struct page **pages)
80{
81 return xen_alloc_ballooned_pages(nr_pages, pages);
82}
83static inline void xen_free_unpopulated_pages(unsigned int nr_pages,
84 struct page **pages)
85{
86 xen_free_ballooned_pages(nr_pages, pages);
87}
88#endif
89
90#if defined(CONFIG_XEN_DOM0) && defined(CONFIG_ACPI) && defined(CONFIG_X86)
91bool __init xen_processor_present(uint32_t acpi_id);
92#else
93#include <linux/bug.h>
94static inline bool xen_processor_present(uint32_t acpi_id)
95{
96 BUG();
97 return false;
98}
99#endif
100
101#endif /* _XEN_XEN_H */
102

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