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, pfn: gfn, nr, err_ptr, prot, domid, |
131 | no_translate: 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, pfn: mfn, nr, err_ptr, prot, domid, |
159 | no_translate: 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, pfn: &gfn, nr, NULL, prot, domid, no_translate: 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 | |