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