1#ifndef INCLUDE_XEN_OPS_H
2#define INCLUDE_XEN_OPS_H
3
4#include <linux/percpu.h>
5#include <linux/notifier.h>
6#include <linux/efi.h>
7#include <asm/xen/interface.h>
8
9DECLARE_PER_CPU(struct vcpu_info *, xen_vcpu);
10
11void xen_arch_pre_suspend(void);
12void xen_arch_post_suspend(int suspend_cancelled);
13
14void xen_timer_resume(void);
15void xen_arch_resume(void);
16void xen_arch_suspend(void);
17
18void xen_resume_notifier_register(struct notifier_block *nb);
19void xen_resume_notifier_unregister(struct notifier_block *nb);
20
21int xen_setup_shutdown_event(void);
22
23extern unsigned long *xen_contiguous_bitmap;
24int xen_create_contiguous_region(phys_addr_t pstart, unsigned int order,
25				unsigned int address_bits,
26				dma_addr_t *dma_handle);
27
28void xen_destroy_contiguous_region(phys_addr_t pstart, unsigned int order);
29
30struct vm_area_struct;
31
32/*
33 * xen_remap_domain_mfn_array() - map an array of foreign frames
34 * @vma:     VMA to map the pages into
35 * @addr:    Address at which to map the pages
36 * @gfn:     Array of GFNs to map
37 * @nr:      Number entries in the GFN array
38 * @err_ptr: Returns per-GFN error status.
39 * @prot:    page protection mask
40 * @domid:   Domain owning the pages
41 * @pages:   Array of pages if this domain has an auto-translated physmap
42 *
43 * @gfn and @err_ptr may point to the same buffer, the GFNs will be
44 * overwritten by the error codes after they are mapped.
45 *
46 * Returns the number of successfully mapped frames, or a -ve error
47 * code.
48 */
49int xen_remap_domain_mfn_array(struct vm_area_struct *vma,
50			       unsigned long addr,
51			       xen_pfn_t *gfn, int nr,
52			       int *err_ptr, pgprot_t prot,
53			       unsigned domid,
54			       struct page **pages);
55
56/* xen_remap_domain_mfn_range() - map a range of foreign frames
57 * @vma:     VMA to map the pages into
58 * @addr:    Address at which to map the pages
59 * @gfn:     First GFN to map.
60 * @nr:      Number frames to map
61 * @prot:    page protection mask
62 * @domid:   Domain owning the pages
63 * @pages:   Array of pages if this domain has an auto-translated physmap
64 *
65 * Returns the number of successfully mapped frames, or a -ve error
66 * code.
67 */
68int xen_remap_domain_mfn_range(struct vm_area_struct *vma,
69			       unsigned long addr,
70			       xen_pfn_t gfn, int nr,
71			       pgprot_t prot, unsigned domid,
72			       struct page **pages);
73int xen_unmap_domain_mfn_range(struct vm_area_struct *vma,
74			       int numpgs, struct page **pages);
75int xen_xlate_remap_gfn_array(struct vm_area_struct *vma,
76			      unsigned long addr,
77			      xen_pfn_t *gfn, int nr,
78			      int *err_ptr, pgprot_t prot,
79			      unsigned domid,
80			      struct page **pages);
81int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma,
82			      int nr, struct page **pages);
83
84bool xen_running_on_version_or_later(unsigned int major, unsigned int minor);
85
86#ifdef CONFIG_XEN_EFI
87extern efi_system_table_t *xen_efi_probe(void);
88#else
89static inline efi_system_table_t __init *xen_efi_probe(void)
90{
91	return NULL;
92}
93#endif
94
95#ifdef CONFIG_PREEMPT
96
97static inline void xen_preemptible_hcall_begin(void)
98{
99}
100
101static inline void xen_preemptible_hcall_end(void)
102{
103}
104
105#else
106
107DECLARE_PER_CPU(bool, xen_in_preemptible_hcall);
108
109static inline void xen_preemptible_hcall_begin(void)
110{
111	__this_cpu_write(xen_in_preemptible_hcall, true);
112}
113
114static inline void xen_preemptible_hcall_end(void)
115{
116	__this_cpu_write(xen_in_preemptible_hcall, false);
117}
118
119#endif /* CONFIG_PREEMPT */
120
121#endif /* INCLUDE_XEN_OPS_H */
122