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