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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);
33void xen_resume_notifier_unregister(struct notifier_block *nb);
34
35bool xen_vcpu_stolen(int vcpu);
36void xen_setup_runstate_info(int cpu);
37void xen_time_setup_guest(void);
38void xen_manage_runstate_time(int action);
39void xen_get_runstate_snapshot(struct vcpu_runstate_info *res);
40u64 xen_steal_clock(int cpu);
41
42int xen_setup_shutdown_event(void);
43
44extern unsigned long *xen_contiguous_bitmap;
45
46#if defined(CONFIG_XEN_PV)
47int 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
51static 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
61struct vm_area_struct;
62
63#ifdef CONFIG_XEN_AUTO_XLATE
64int 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);
70int 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 */
77static 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
87static 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
94int 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 */
114static 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 */
150static 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 */
174static 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
186int xen_unmap_domain_gfn_range(struct vm_area_struct *vma,
187 int numpgs, struct page **pages);
188
189int xen_xlate_map_ballooned_pages(xen_pfn_t **pfns, void **vaddr,
190 unsigned long nr_grant_frames);
191
192bool xen_running_on_version_or_later(unsigned int major, unsigned int minor);
193
194void xen_efi_runtime_setup(void);
195
196
197#if defined(CONFIG_XEN_PV) && !defined(CONFIG_PREEMPTION)
198
199DECLARE_PER_CPU(bool, xen_in_preemptible_hcall);
200
201static inline void xen_preemptible_hcall_begin(void)
202{
203 __this_cpu_write(xen_in_preemptible_hcall, true);
204}
205
206static inline void xen_preemptible_hcall_end(void)
207{
208 __this_cpu_write(xen_in_preemptible_hcall, false);
209}
210
211#else
212
213static inline void xen_preemptible_hcall_begin(void) { }
214static inline void xen_preemptible_hcall_end(void) { }
215
216#endif /* CONFIG_XEN_PV && !CONFIG_PREEMPTION */
217
218#ifdef CONFIG_XEN_GRANT_DMA_OPS
219bool xen_virtio_restricted_mem_acc(struct virtio_device *dev);
220#else
221struct virtio_device;
222
223static 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 */
1#ifndef INCLUDE_XEN_OPS_H
2#define INCLUDE_XEN_OPS_H
3
4#include <linux/percpu.h>
5#include <linux/notifier.h>
6#include <linux/efi.h>
7#include <asm/xen/interface.h>
8#include <xen/interface/vcpu.h>
9
10DECLARE_PER_CPU(struct vcpu_info *, xen_vcpu);
11
12void xen_arch_pre_suspend(void);
13void xen_arch_post_suspend(int suspend_cancelled);
14
15void xen_timer_resume(void);
16void xen_arch_resume(void);
17void xen_arch_suspend(void);
18
19void xen_resume_notifier_register(struct notifier_block *nb);
20void xen_resume_notifier_unregister(struct notifier_block *nb);
21
22bool xen_vcpu_stolen(int vcpu);
23void xen_setup_runstate_info(int cpu);
24void xen_get_runstate_snapshot(struct vcpu_runstate_info *res);
25
26int xen_setup_shutdown_event(void);
27
28extern unsigned long *xen_contiguous_bitmap;
29int xen_create_contiguous_region(phys_addr_t pstart, unsigned int order,
30 unsigned int address_bits,
31 dma_addr_t *dma_handle);
32
33void xen_destroy_contiguous_region(phys_addr_t pstart, unsigned int order);
34
35struct vm_area_struct;
36
37/*
38 * xen_remap_domain_gfn_array() - map an array of foreign frames
39 * @vma: VMA to map the pages into
40 * @addr: Address at which to map the pages
41 * @gfn: Array of GFNs to map
42 * @nr: Number entries in the GFN array
43 * @err_ptr: Returns per-GFN error status.
44 * @prot: page protection mask
45 * @domid: Domain owning the pages
46 * @pages: Array of pages if this domain has an auto-translated physmap
47 *
48 * @gfn and @err_ptr may point to the same buffer, the GFNs will be
49 * overwritten by the error codes after they are mapped.
50 *
51 * Returns the number of successfully mapped frames, or a -ve error
52 * code.
53 */
54int xen_remap_domain_gfn_array(struct vm_area_struct *vma,
55 unsigned long addr,
56 xen_pfn_t *gfn, int nr,
57 int *err_ptr, pgprot_t prot,
58 unsigned domid,
59 struct page **pages);
60
61/* xen_remap_domain_gfn_range() - map a range of foreign frames
62 * @vma: VMA to map the pages into
63 * @addr: Address at which to map the pages
64 * @gfn: First GFN to map.
65 * @nr: Number frames to map
66 * @prot: page protection mask
67 * @domid: Domain owning the pages
68 * @pages: Array of pages if this domain has an auto-translated physmap
69 *
70 * Returns the number of successfully mapped frames, or a -ve error
71 * code.
72 */
73int xen_remap_domain_gfn_range(struct vm_area_struct *vma,
74 unsigned long addr,
75 xen_pfn_t gfn, int nr,
76 pgprot_t prot, unsigned domid,
77 struct page **pages);
78int xen_unmap_domain_gfn_range(struct vm_area_struct *vma,
79 int numpgs, struct page **pages);
80int xen_xlate_remap_gfn_array(struct vm_area_struct *vma,
81 unsigned long addr,
82 xen_pfn_t *gfn, int nr,
83 int *err_ptr, pgprot_t prot,
84 unsigned domid,
85 struct page **pages);
86int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma,
87 int nr, struct page **pages);
88
89bool xen_running_on_version_or_later(unsigned int major, unsigned int minor);
90
91#ifdef CONFIG_XEN_EFI
92extern efi_system_table_t *xen_efi_probe(void);
93#else
94static inline efi_system_table_t __init *xen_efi_probe(void)
95{
96 return NULL;
97}
98#endif
99
100#ifdef CONFIG_PREEMPT
101
102static inline void xen_preemptible_hcall_begin(void)
103{
104}
105
106static inline void xen_preemptible_hcall_end(void)
107{
108}
109
110#else
111
112DECLARE_PER_CPU(bool, xen_in_preemptible_hcall);
113
114static inline void xen_preemptible_hcall_begin(void)
115{
116 __this_cpu_write(xen_in_preemptible_hcall, true);
117}
118
119static inline void xen_preemptible_hcall_end(void)
120{
121 __this_cpu_write(xen_in_preemptible_hcall, false);
122}
123
124#endif /* CONFIG_PREEMPT */
125
126#endif /* INCLUDE_XEN_OPS_H */