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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef INCLUDE_XEN_OPS_H
3#define INCLUDE_XEN_OPS_H
4
5#include <linux/percpu.h>
6#include <linux/notifier.h>
7#include <linux/efi.h>
8#include <xen/features.h>
9#include <asm/xen/interface.h>
10#include <xen/interface/vcpu.h>
11
12DECLARE_PER_CPU(struct vcpu_info *, xen_vcpu);
13
14DECLARE_PER_CPU(uint32_t, xen_vcpu_id);
15static inline uint32_t xen_vcpu_nr(int cpu)
16{
17 return per_cpu(xen_vcpu_id, cpu);
18}
19
20#define XEN_VCPU_ID_INVALID U32_MAX
21
22void xen_arch_pre_suspend(void);
23void xen_arch_post_suspend(int suspend_cancelled);
24
25void xen_timer_resume(void);
26void xen_arch_resume(void);
27void xen_arch_suspend(void);
28
29void xen_reboot(int reason);
30
31void xen_resume_notifier_register(struct notifier_block *nb);
32void xen_resume_notifier_unregister(struct notifier_block *nb);
33
34bool xen_vcpu_stolen(int vcpu);
35void xen_setup_runstate_info(int cpu);
36void xen_time_setup_guest(void);
37void xen_manage_runstate_time(int action);
38void xen_get_runstate_snapshot(struct vcpu_runstate_info *res);
39u64 xen_steal_clock(int cpu);
40
41int xen_setup_shutdown_event(void);
42
43extern unsigned long *xen_contiguous_bitmap;
44
45#if defined(CONFIG_XEN_PV) || defined(CONFIG_ARM) || defined(CONFIG_ARM64)
46int xen_create_contiguous_region(phys_addr_t pstart, unsigned int order,
47 unsigned int address_bits,
48 dma_addr_t *dma_handle);
49
50void xen_destroy_contiguous_region(phys_addr_t pstart, unsigned int order);
51#else
52static inline int xen_create_contiguous_region(phys_addr_t pstart,
53 unsigned int order,
54 unsigned int address_bits,
55 dma_addr_t *dma_handle)
56{
57 return 0;
58}
59
60static inline void xen_destroy_contiguous_region(phys_addr_t pstart,
61 unsigned int order) { }
62#endif
63
64#if defined(CONFIG_XEN_PV)
65int xen_remap_pfn(struct vm_area_struct *vma, unsigned long addr,
66 xen_pfn_t *pfn, int nr, int *err_ptr, pgprot_t prot,
67 unsigned int domid, bool no_translate, struct page **pages);
68#else
69static inline int xen_remap_pfn(struct vm_area_struct *vma, unsigned long addr,
70 xen_pfn_t *pfn, int nr, int *err_ptr,
71 pgprot_t prot, unsigned int domid,
72 bool no_translate, struct page **pages)
73{
74 BUG();
75 return 0;
76}
77#endif
78
79struct vm_area_struct;
80
81#ifdef CONFIG_XEN_AUTO_XLATE
82int xen_xlate_remap_gfn_array(struct vm_area_struct *vma,
83 unsigned long addr,
84 xen_pfn_t *gfn, int nr,
85 int *err_ptr, pgprot_t prot,
86 unsigned int domid,
87 struct page **pages);
88int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma,
89 int nr, struct page **pages);
90#else
91/*
92 * These two functions are called from arch/x86/xen/mmu.c and so stubs
93 * are needed for a configuration not specifying CONFIG_XEN_AUTO_XLATE.
94 */
95static inline int xen_xlate_remap_gfn_array(struct vm_area_struct *vma,
96 unsigned long addr,
97 xen_pfn_t *gfn, int nr,
98 int *err_ptr, pgprot_t prot,
99 unsigned int domid,
100 struct page **pages)
101{
102 return -EOPNOTSUPP;
103}
104
105static inline int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma,
106 int nr, struct page **pages)
107{
108 return -EOPNOTSUPP;
109}
110#endif
111
112int xen_remap_vma_range(struct vm_area_struct *vma, unsigned long addr,
113 unsigned long len);
114
115/*
116 * xen_remap_domain_gfn_array() - map an array of foreign frames by gfn
117 * @vma: VMA to map the pages into
118 * @addr: Address at which to map the pages
119 * @gfn: Array of GFNs to map
120 * @nr: Number entries in the GFN array
121 * @err_ptr: Returns per-GFN error status.
122 * @prot: page protection mask
123 * @domid: Domain owning the pages
124 * @pages: Array of pages if this domain has an auto-translated physmap
125 *
126 * @gfn and @err_ptr may point to the same buffer, the GFNs will be
127 * overwritten by the error codes after they are mapped.
128 *
129 * Returns the number of successfully mapped frames, or a -ve error
130 * code.
131 */
132static inline int xen_remap_domain_gfn_array(struct vm_area_struct *vma,
133 unsigned long addr,
134 xen_pfn_t *gfn, int nr,
135 int *err_ptr, pgprot_t prot,
136 unsigned int domid,
137 struct page **pages)
138{
139 if (xen_feature(XENFEAT_auto_translated_physmap))
140 return xen_xlate_remap_gfn_array(vma, addr, gfn, nr, err_ptr,
141 prot, domid, pages);
142
143 /* We BUG_ON because it's a programmer error to pass a NULL err_ptr,
144 * and the consequences later is quite hard to detect what the actual
145 * cause of "wrong memory was mapped in".
146 */
147 BUG_ON(err_ptr == NULL);
148 return xen_remap_pfn(vma, addr, gfn, nr, err_ptr, prot, domid,
149 false, pages);
150}
151
152/*
153 * xen_remap_domain_mfn_array() - map an array of foreign frames by mfn
154 * @vma: VMA to map the pages into
155 * @addr: Address at which to map the pages
156 * @mfn: Array of MFNs to map
157 * @nr: Number entries in the MFN array
158 * @err_ptr: Returns per-MFN error status.
159 * @prot: page protection mask
160 * @domid: Domain owning the pages
161 * @pages: Array of pages if this domain has an auto-translated physmap
162 *
163 * @mfn and @err_ptr may point to the same buffer, the MFNs will be
164 * overwritten by the error codes after they are mapped.
165 *
166 * Returns the number of successfully mapped frames, or a -ve error
167 * code.
168 */
169static inline int xen_remap_domain_mfn_array(struct vm_area_struct *vma,
170 unsigned long addr, xen_pfn_t *mfn,
171 int nr, int *err_ptr,
172 pgprot_t prot, unsigned int domid,
173 struct page **pages)
174{
175 if (xen_feature(XENFEAT_auto_translated_physmap))
176 return -EOPNOTSUPP;
177
178 return xen_remap_pfn(vma, addr, mfn, nr, err_ptr, prot, domid,
179 true, pages);
180}
181
182/* xen_remap_domain_gfn_range() - map a range of foreign frames
183 * @vma: VMA to map the pages into
184 * @addr: Address at which to map the pages
185 * @gfn: First GFN to map.
186 * @nr: Number frames to map
187 * @prot: page protection mask
188 * @domid: Domain owning the pages
189 * @pages: Array of pages if this domain has an auto-translated physmap
190 *
191 * Returns the number of successfully mapped frames, or a -ve error
192 * code.
193 */
194static inline int xen_remap_domain_gfn_range(struct vm_area_struct *vma,
195 unsigned long addr,
196 xen_pfn_t gfn, int nr,
197 pgprot_t prot, unsigned int domid,
198 struct page **pages)
199{
200 if (xen_feature(XENFEAT_auto_translated_physmap))
201 return -EOPNOTSUPP;
202
203 return xen_remap_pfn(vma, addr, &gfn, nr, NULL, prot, domid, false,
204 pages);
205}
206
207int xen_unmap_domain_gfn_range(struct vm_area_struct *vma,
208 int numpgs, struct page **pages);
209
210int xen_xlate_map_ballooned_pages(xen_pfn_t **pfns, void **vaddr,
211 unsigned long nr_grant_frames);
212
213bool xen_running_on_version_or_later(unsigned int major, unsigned int minor);
214
215void xen_efi_runtime_setup(void);
216
217
218#ifdef CONFIG_PREEMPT
219
220static inline void xen_preemptible_hcall_begin(void)
221{
222}
223
224static inline void xen_preemptible_hcall_end(void)
225{
226}
227
228#else
229
230DECLARE_PER_CPU(bool, xen_in_preemptible_hcall);
231
232static inline void xen_preemptible_hcall_begin(void)
233{
234 __this_cpu_write(xen_in_preemptible_hcall, true);
235}
236
237static inline void xen_preemptible_hcall_end(void)
238{
239 __this_cpu_write(xen_in_preemptible_hcall, false);
240}
241
242#endif /* CONFIG_PREEMPT */
243
244#endif /* INCLUDE_XEN_OPS_H */
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 <asm/xen/interface.h>
7
8DECLARE_PER_CPU(struct vcpu_info *, xen_vcpu);
9
10void xen_arch_pre_suspend(void);
11void xen_arch_post_suspend(int suspend_cancelled);
12void xen_arch_hvm_post_suspend(int suspend_cancelled);
13
14void xen_mm_pin_all(void);
15void xen_mm_unpin_all(void);
16
17void xen_timer_resume(void);
18void xen_arch_resume(void);
19
20void xen_resume_notifier_register(struct notifier_block *nb);
21void xen_resume_notifier_unregister(struct notifier_block *nb);
22
23int xen_setup_shutdown_event(void);
24
25extern unsigned long *xen_contiguous_bitmap;
26int xen_create_contiguous_region(phys_addr_t pstart, unsigned int order,
27 unsigned int address_bits,
28 dma_addr_t *dma_handle);
29
30void xen_destroy_contiguous_region(phys_addr_t pstart, unsigned int order);
31
32struct vm_area_struct;
33int xen_remap_domain_mfn_range(struct vm_area_struct *vma,
34 unsigned long addr,
35 xen_pfn_t mfn, int nr,
36 pgprot_t prot, unsigned domid,
37 struct page **pages);
38int xen_unmap_domain_mfn_range(struct vm_area_struct *vma,
39 int numpgs, struct page **pages);
40
41bool xen_running_on_version_or_later(unsigned int major, unsigned int minor);
42#endif /* INCLUDE_XEN_OPS_H */