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