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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/* 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 <asm/xen/interface.h>
9#include <xen/interface/vcpu.h>
10
11DECLARE_PER_CPU(struct vcpu_info *, xen_vcpu);
12
13DECLARE_PER_CPU(uint32_t, xen_vcpu_id);
14static inline uint32_t xen_vcpu_nr(int cpu)
15{
16 return per_cpu(xen_vcpu_id, cpu);
17}
18
19#define XEN_VCPU_ID_INVALID U32_MAX
20
21void xen_arch_pre_suspend(void);
22void xen_arch_post_suspend(int suspend_cancelled);
23
24void xen_timer_resume(void);
25void xen_arch_resume(void);
26void xen_arch_suspend(void);
27
28void xen_reboot(int reason);
29
30void xen_resume_notifier_register(struct notifier_block *nb);
31void xen_resume_notifier_unregister(struct notifier_block *nb);
32
33bool xen_vcpu_stolen(int vcpu);
34void xen_setup_runstate_info(int cpu);
35void xen_time_setup_guest(void);
36void xen_manage_runstate_time(int action);
37void xen_get_runstate_snapshot(struct vcpu_runstate_info *res);
38u64 xen_steal_clock(int cpu);
39
40int xen_setup_shutdown_event(void);
41
42extern unsigned long *xen_contiguous_bitmap;
43
44#ifdef CONFIG_XEN_PV
45int xen_create_contiguous_region(phys_addr_t pstart, unsigned int order,
46 unsigned int address_bits,
47 dma_addr_t *dma_handle);
48
49void xen_destroy_contiguous_region(phys_addr_t pstart, unsigned int order);
50#else
51static inline int xen_create_contiguous_region(phys_addr_t pstart,
52 unsigned int order,
53 unsigned int address_bits,
54 dma_addr_t *dma_handle)
55{
56 return 0;
57}
58
59static inline void xen_destroy_contiguous_region(phys_addr_t pstart,
60 unsigned int order) { }
61#endif
62
63struct vm_area_struct;
64
65/*
66 * xen_remap_domain_gfn_array() - map an array of foreign frames
67 * @vma: VMA to map the pages into
68 * @addr: Address at which to map the pages
69 * @gfn: Array of GFNs to map
70 * @nr: Number entries in the GFN array
71 * @err_ptr: Returns per-GFN error status.
72 * @prot: page protection mask
73 * @domid: Domain owning the pages
74 * @pages: Array of pages if this domain has an auto-translated physmap
75 *
76 * @gfn and @err_ptr may point to the same buffer, the GFNs will be
77 * overwritten by the error codes after they are mapped.
78 *
79 * Returns the number of successfully mapped frames, or a -ve error
80 * code.
81 */
82int xen_remap_domain_gfn_array(struct vm_area_struct *vma,
83 unsigned long addr,
84 xen_pfn_t *gfn, int nr,
85 int *err_ptr, pgprot_t prot,
86 unsigned domid,
87 struct page **pages);
88
89/* xen_remap_domain_gfn_range() - map a range of foreign frames
90 * @vma: VMA to map the pages into
91 * @addr: Address at which to map the pages
92 * @gfn: First GFN to map.
93 * @nr: Number frames to map
94 * @prot: page protection mask
95 * @domid: Domain owning the pages
96 * @pages: Array of pages if this domain has an auto-translated physmap
97 *
98 * Returns the number of successfully mapped frames, or a -ve error
99 * code.
100 */
101int xen_remap_domain_gfn_range(struct vm_area_struct *vma,
102 unsigned long addr,
103 xen_pfn_t gfn, int nr,
104 pgprot_t prot, unsigned domid,
105 struct page **pages);
106int xen_unmap_domain_gfn_range(struct vm_area_struct *vma,
107 int numpgs, struct page **pages);
108
109#ifdef CONFIG_XEN_AUTO_XLATE
110int xen_xlate_remap_gfn_array(struct vm_area_struct *vma,
111 unsigned long addr,
112 xen_pfn_t *gfn, int nr,
113 int *err_ptr, pgprot_t prot,
114 unsigned domid,
115 struct page **pages);
116int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma,
117 int nr, struct page **pages);
118#else
119/*
120 * These two functions are called from arch/x86/xen/mmu.c and so stubs
121 * are needed for a configuration not specifying CONFIG_XEN_AUTO_XLATE.
122 */
123static inline int xen_xlate_remap_gfn_array(struct vm_area_struct *vma,
124 unsigned long addr,
125 xen_pfn_t *gfn, int nr,
126 int *err_ptr, pgprot_t prot,
127 unsigned int domid,
128 struct page **pages)
129{
130 return -EOPNOTSUPP;
131}
132
133static inline int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma,
134 int nr, struct page **pages)
135{
136 return -EOPNOTSUPP;
137}
138#endif
139
140int xen_xlate_map_ballooned_pages(xen_pfn_t **pfns, void **vaddr,
141 unsigned long nr_grant_frames);
142
143bool xen_running_on_version_or_later(unsigned int major, unsigned int minor);
144
145efi_status_t xen_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc);
146efi_status_t xen_efi_set_time(efi_time_t *tm);
147efi_status_t xen_efi_get_wakeup_time(efi_bool_t *enabled, efi_bool_t *pending,
148 efi_time_t *tm);
149efi_status_t xen_efi_set_wakeup_time(efi_bool_t enabled, efi_time_t *tm);
150efi_status_t xen_efi_get_variable(efi_char16_t *name, efi_guid_t *vendor,
151 u32 *attr, unsigned long *data_size,
152 void *data);
153efi_status_t xen_efi_get_next_variable(unsigned long *name_size,
154 efi_char16_t *name, efi_guid_t *vendor);
155efi_status_t xen_efi_set_variable(efi_char16_t *name, efi_guid_t *vendor,
156 u32 attr, unsigned long data_size,
157 void *data);
158efi_status_t xen_efi_query_variable_info(u32 attr, u64 *storage_space,
159 u64 *remaining_space,
160 u64 *max_variable_size);
161efi_status_t xen_efi_get_next_high_mono_count(u32 *count);
162efi_status_t xen_efi_update_capsule(efi_capsule_header_t **capsules,
163 unsigned long count, unsigned long sg_list);
164efi_status_t xen_efi_query_capsule_caps(efi_capsule_header_t **capsules,
165 unsigned long count, u64 *max_size,
166 int *reset_type);
167void xen_efi_reset_system(int reset_type, efi_status_t status,
168 unsigned long data_size, efi_char16_t *data);
169
170
171#ifdef CONFIG_PREEMPT
172
173static inline void xen_preemptible_hcall_begin(void)
174{
175}
176
177static inline void xen_preemptible_hcall_end(void)
178{
179}
180
181#else
182
183DECLARE_PER_CPU(bool, xen_in_preemptible_hcall);
184
185static inline void xen_preemptible_hcall_begin(void)
186{
187 __this_cpu_write(xen_in_preemptible_hcall, true);
188}
189
190static inline void xen_preemptible_hcall_end(void)
191{
192 __this_cpu_write(xen_in_preemptible_hcall, false);
193}
194
195#endif /* CONFIG_PREEMPT */
196
197#endif /* INCLUDE_XEN_OPS_H */