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Linux kernel mirror (for testing)
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linux
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
112/*
113 * xen_remap_domain_gfn_array() - map an array of foreign frames by gfn
114 * @vma: VMA to map the pages into
115 * @addr: Address at which to map the pages
116 * @gfn: Array of GFNs to map
117 * @nr: Number entries in the GFN array
118 * @err_ptr: Returns per-GFN error status.
119 * @prot: page protection mask
120 * @domid: Domain owning the pages
121 * @pages: Array of pages if this domain has an auto-translated physmap
122 *
123 * @gfn and @err_ptr may point to the same buffer, the GFNs will be
124 * overwritten by the error codes after they are mapped.
125 *
126 * Returns the number of successfully mapped frames, or a -ve error
127 * code.
128 */
129static inline int xen_remap_domain_gfn_array(struct vm_area_struct *vma,
130 unsigned long addr,
131 xen_pfn_t *gfn, int nr,
132 int *err_ptr, pgprot_t prot,
133 unsigned int domid,
134 struct page **pages)
135{
136 if (xen_feature(XENFEAT_auto_translated_physmap))
137 return xen_xlate_remap_gfn_array(vma, addr, gfn, nr, err_ptr,
138 prot, domid, pages);
139
140 /* We BUG_ON because it's a programmer error to pass a NULL err_ptr,
141 * and the consequences later is quite hard to detect what the actual
142 * cause of "wrong memory was mapped in".
143 */
144 BUG_ON(err_ptr == NULL);
145 return xen_remap_pfn(vma, addr, gfn, nr, err_ptr, prot, domid,
146 false, pages);
147}
148
149/*
150 * xen_remap_domain_mfn_array() - map an array of foreign frames by mfn
151 * @vma: VMA to map the pages into
152 * @addr: Address at which to map the pages
153 * @mfn: Array of MFNs to map
154 * @nr: Number entries in the MFN array
155 * @err_ptr: Returns per-MFN error status.
156 * @prot: page protection mask
157 * @domid: Domain owning the pages
158 * @pages: Array of pages if this domain has an auto-translated physmap
159 *
160 * @mfn and @err_ptr may point to the same buffer, the MFNs will be
161 * overwritten by the error codes after they are mapped.
162 *
163 * Returns the number of successfully mapped frames, or a -ve error
164 * code.
165 */
166static inline int xen_remap_domain_mfn_array(struct vm_area_struct *vma,
167 unsigned long addr, xen_pfn_t *mfn,
168 int nr, int *err_ptr,
169 pgprot_t prot, unsigned int domid,
170 struct page **pages)
171{
172 if (xen_feature(XENFEAT_auto_translated_physmap))
173 return -EOPNOTSUPP;
174
175 return xen_remap_pfn(vma, addr, mfn, nr, err_ptr, prot, domid,
176 true, pages);
177}
178
179/* xen_remap_domain_gfn_range() - map a range of foreign frames
180 * @vma: VMA to map the pages into
181 * @addr: Address at which to map the pages
182 * @gfn: First GFN to map.
183 * @nr: Number frames to map
184 * @prot: page protection mask
185 * @domid: Domain owning the pages
186 * @pages: Array of pages if this domain has an auto-translated physmap
187 *
188 * Returns the number of successfully mapped frames, or a -ve error
189 * code.
190 */
191static inline int xen_remap_domain_gfn_range(struct vm_area_struct *vma,
192 unsigned long addr,
193 xen_pfn_t gfn, int nr,
194 pgprot_t prot, unsigned int domid,
195 struct page **pages)
196{
197 if (xen_feature(XENFEAT_auto_translated_physmap))
198 return -EOPNOTSUPP;
199
200 return xen_remap_pfn(vma, addr, &gfn, nr, NULL, prot, domid, false,
201 pages);
202}
203
204int xen_unmap_domain_gfn_range(struct vm_area_struct *vma,
205 int numpgs, struct page **pages);
206
207int xen_xlate_map_ballooned_pages(xen_pfn_t **pfns, void **vaddr,
208 unsigned long nr_grant_frames);
209
210bool xen_running_on_version_or_later(unsigned int major, unsigned int minor);
211
212efi_status_t xen_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc);
213efi_status_t xen_efi_set_time(efi_time_t *tm);
214efi_status_t xen_efi_get_wakeup_time(efi_bool_t *enabled, efi_bool_t *pending,
215 efi_time_t *tm);
216efi_status_t xen_efi_set_wakeup_time(efi_bool_t enabled, efi_time_t *tm);
217efi_status_t xen_efi_get_variable(efi_char16_t *name, efi_guid_t *vendor,
218 u32 *attr, unsigned long *data_size,
219 void *data);
220efi_status_t xen_efi_get_next_variable(unsigned long *name_size,
221 efi_char16_t *name, efi_guid_t *vendor);
222efi_status_t xen_efi_set_variable(efi_char16_t *name, efi_guid_t *vendor,
223 u32 attr, unsigned long data_size,
224 void *data);
225efi_status_t xen_efi_query_variable_info(u32 attr, u64 *storage_space,
226 u64 *remaining_space,
227 u64 *max_variable_size);
228efi_status_t xen_efi_get_next_high_mono_count(u32 *count);
229efi_status_t xen_efi_update_capsule(efi_capsule_header_t **capsules,
230 unsigned long count, unsigned long sg_list);
231efi_status_t xen_efi_query_capsule_caps(efi_capsule_header_t **capsules,
232 unsigned long count, u64 *max_size,
233 int *reset_type);
234void xen_efi_reset_system(int reset_type, efi_status_t status,
235 unsigned long data_size, efi_char16_t *data);
236
237
238#ifdef CONFIG_PREEMPT
239
240static inline void xen_preemptible_hcall_begin(void)
241{
242}
243
244static inline void xen_preemptible_hcall_end(void)
245{
246}
247
248#else
249
250DECLARE_PER_CPU(bool, xen_in_preemptible_hcall);
251
252static inline void xen_preemptible_hcall_begin(void)
253{
254 __this_cpu_write(xen_in_preemptible_hcall, true);
255}
256
257static inline void xen_preemptible_hcall_end(void)
258{
259 __this_cpu_write(xen_in_preemptible_hcall, false);
260}
261
262#endif /* CONFIG_PREEMPT */
263
264#endif /* INCLUDE_XEN_OPS_H */