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 <asm/xen/interface.h>
9 #include <xen/interface/vcpu.h>
10 
11 DECLARE_PER_CPU(struct vcpu_info *, xen_vcpu);
12 
13 DECLARE_PER_CPU(uint32_t, xen_vcpu_id);
xen_vcpu_nr(int cpu)14 static inline uint32_t xen_vcpu_nr(int cpu)
15 {
16 	return per_cpu(xen_vcpu_id, cpu);
17 }
18 
19 #define XEN_VCPU_ID_INVALID U32_MAX
20 
21 void xen_arch_pre_suspend(void);
22 void xen_arch_post_suspend(int suspend_cancelled);
23 
24 void xen_timer_resume(void);
25 void xen_arch_resume(void);
26 void xen_arch_suspend(void);
27 
28 void xen_reboot(int reason);
29 
30 void xen_resume_notifier_register(struct notifier_block *nb);
31 void xen_resume_notifier_unregister(struct notifier_block *nb);
32 
33 bool xen_vcpu_stolen(int vcpu);
34 void xen_setup_runstate_info(int cpu);
35 void xen_time_setup_guest(void);
36 void xen_manage_runstate_time(int action);
37 void xen_get_runstate_snapshot(struct vcpu_runstate_info *res);
38 u64 xen_steal_clock(int cpu);
39 
40 int xen_setup_shutdown_event(void);
41 
42 extern unsigned long *xen_contiguous_bitmap;
43 
44 #if defined(CONFIG_XEN_PV) || defined(CONFIG_ARM) || defined(CONFIG_ARM64)
45 int xen_create_contiguous_region(phys_addr_t pstart, unsigned int order,
46 				unsigned int address_bits,
47 				dma_addr_t *dma_handle);
48 
49 void xen_destroy_contiguous_region(phys_addr_t pstart, unsigned int order);
50 #else
xen_create_contiguous_region(phys_addr_t pstart,unsigned int order,unsigned int address_bits,dma_addr_t * dma_handle)51 static inline int xen_create_contiguous_region(phys_addr_t pstart,
52 					       unsigned int order,
53 					       unsigned int address_bits,
54 					       dma_addr_t *dma_handle)
55 {
56 	return 0;
57 }
58 
xen_destroy_contiguous_region(phys_addr_t pstart,unsigned int order)59 static inline void xen_destroy_contiguous_region(phys_addr_t pstart,
60 						 unsigned int order) { }
61 #endif
62 
63 struct vm_area_struct;
64 
65 /*
66  * xen_remap_domain_gfn_array() - map an array of foreign frames by gfn
67  * @vma:     VMA to map the pages into
68  * @addr:    Address at which to map the pages
69  * @gfn:     Array of GFNs to map
70  * @nr:      Number entries in the GFN array
71  * @err_ptr: Returns per-GFN error status.
72  * @prot:    page protection mask
73  * @domid:   Domain owning the pages
74  * @pages:   Array of pages if this domain has an auto-translated physmap
75  *
76  * @gfn and @err_ptr may point to the same buffer, the GFNs will be
77  * overwritten by the error codes after they are mapped.
78  *
79  * Returns the number of successfully mapped frames, or a -ve error
80  * code.
81  */
82 int xen_remap_domain_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 domid,
87 			       struct page **pages);
88 
89 /*
90  * xen_remap_domain_mfn_array() - map an array of foreign frames by mfn
91  * @vma:     VMA to map the pages into
92  * @addr:    Address at which to map the pages
93  * @mfn:     Array of MFNs to map
94  * @nr:      Number entries in the MFN array
95  * @err_ptr: Returns per-MFN error status.
96  * @prot:    page protection mask
97  * @domid:   Domain owning the pages
98  * @pages:   Array of pages if this domain has an auto-translated physmap
99  *
100  * @mfn and @err_ptr may point to the same buffer, the MFNs will be
101  * overwritten by the error codes after they are mapped.
102  *
103  * Returns the number of successfully mapped frames, or a -ve error
104  * code.
105  */
106 int xen_remap_domain_mfn_array(struct vm_area_struct *vma,
107 			       unsigned long addr, xen_pfn_t *mfn, int nr,
108 			       int *err_ptr, pgprot_t prot,
109 			       unsigned int domid, struct page **pages);
110 
111 /* xen_remap_domain_gfn_range() - map a range of foreign frames
112  * @vma:     VMA to map the pages into
113  * @addr:    Address at which to map the pages
114  * @gfn:     First GFN to map.
115  * @nr:      Number frames to map
116  * @prot:    page protection mask
117  * @domid:   Domain owning the pages
118  * @pages:   Array of pages if this domain has an auto-translated physmap
119  *
120  * Returns the number of successfully mapped frames, or a -ve error
121  * code.
122  */
123 int xen_remap_domain_gfn_range(struct vm_area_struct *vma,
124 			       unsigned long addr,
125 			       xen_pfn_t gfn, int nr,
126 			       pgprot_t prot, unsigned domid,
127 			       struct page **pages);
128 int xen_unmap_domain_gfn_range(struct vm_area_struct *vma,
129 			       int numpgs, struct page **pages);
130 
131 #ifdef CONFIG_XEN_AUTO_XLATE
132 int xen_xlate_remap_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 domid,
137 			      struct page **pages);
138 int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma,
139 			      int nr, struct page **pages);
140 #else
141 /*
142  * These two functions are called from arch/x86/xen/mmu.c and so stubs
143  * are needed for a configuration not specifying CONFIG_XEN_AUTO_XLATE.
144  */
xen_xlate_remap_gfn_array(struct vm_area_struct * vma,unsigned long addr,xen_pfn_t * gfn,int nr,int * err_ptr,pgprot_t prot,unsigned int domid,struct page ** pages)145 static inline int xen_xlate_remap_gfn_array(struct vm_area_struct *vma,
146 					    unsigned long addr,
147 					    xen_pfn_t *gfn, int nr,
148 					    int *err_ptr, pgprot_t prot,
149 					    unsigned int domid,
150 					    struct page **pages)
151 {
152 	return -EOPNOTSUPP;
153 }
154 
xen_xlate_unmap_gfn_range(struct vm_area_struct * vma,int nr,struct page ** pages)155 static inline int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma,
156 					    int nr, struct page **pages)
157 {
158 	return -EOPNOTSUPP;
159 }
160 #endif
161 
162 int xen_xlate_map_ballooned_pages(xen_pfn_t **pfns, void **vaddr,
163 				  unsigned long nr_grant_frames);
164 
165 bool xen_running_on_version_or_later(unsigned int major, unsigned int minor);
166 
167 efi_status_t xen_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc);
168 efi_status_t xen_efi_set_time(efi_time_t *tm);
169 efi_status_t xen_efi_get_wakeup_time(efi_bool_t *enabled, efi_bool_t *pending,
170 				     efi_time_t *tm);
171 efi_status_t xen_efi_set_wakeup_time(efi_bool_t enabled, efi_time_t *tm);
172 efi_status_t xen_efi_get_variable(efi_char16_t *name, efi_guid_t *vendor,
173 				  u32 *attr, unsigned long *data_size,
174 				  void *data);
175 efi_status_t xen_efi_get_next_variable(unsigned long *name_size,
176 				       efi_char16_t *name, efi_guid_t *vendor);
177 efi_status_t xen_efi_set_variable(efi_char16_t *name, efi_guid_t *vendor,
178 				  u32 attr, unsigned long data_size,
179 				  void *data);
180 efi_status_t xen_efi_query_variable_info(u32 attr, u64 *storage_space,
181 					 u64 *remaining_space,
182 					 u64 *max_variable_size);
183 efi_status_t xen_efi_get_next_high_mono_count(u32 *count);
184 efi_status_t xen_efi_update_capsule(efi_capsule_header_t **capsules,
185 				    unsigned long count, unsigned long sg_list);
186 efi_status_t xen_efi_query_capsule_caps(efi_capsule_header_t **capsules,
187 					unsigned long count, u64 *max_size,
188 					int *reset_type);
189 void xen_efi_reset_system(int reset_type, efi_status_t status,
190 			  unsigned long data_size, efi_char16_t *data);
191 
192 
193 #ifdef CONFIG_PREEMPT
194 
xen_preemptible_hcall_begin(void)195 static inline void xen_preemptible_hcall_begin(void)
196 {
197 }
198 
xen_preemptible_hcall_end(void)199 static inline void xen_preemptible_hcall_end(void)
200 {
201 }
202 
203 #else
204 
205 DECLARE_PER_CPU(bool, xen_in_preemptible_hcall);
206 
xen_preemptible_hcall_begin(void)207 static inline void xen_preemptible_hcall_begin(void)
208 {
209 	__this_cpu_write(xen_in_preemptible_hcall, true);
210 }
211 
xen_preemptible_hcall_end(void)212 static inline void xen_preemptible_hcall_end(void)
213 {
214 	__this_cpu_write(xen_in_preemptible_hcall, false);
215 }
216 
217 #endif /* CONFIG_PREEMPT */
218 
219 #endif /* INCLUDE_XEN_OPS_H */
220