1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef INCLUDE_XEN_OPS_H
3 #define INCLUDE_XEN_OPS_H
5 #include <linux/percpu.h>
6 #include <linux/notifier.h>
8 #include <linux/virtio_anchor.h>
9 #include <xen/features.h>
10 #include <asm/xen/interface.h>
11 #include <xen/interface/vcpu.h>
13 DECLARE_PER_CPU(struct vcpu_info *, xen_vcpu);
15 DECLARE_PER_CPU(uint32_t, xen_vcpu_id);
16 static inline uint32_t xen_vcpu_nr(int cpu)
18 return per_cpu(xen_vcpu_id, cpu);
21 #define XEN_VCPU_ID_INVALID U32_MAX
23 void xen_arch_pre_suspend(void);
24 void xen_arch_post_suspend(int suspend_cancelled);
26 void xen_timer_resume(void);
27 void xen_arch_resume(void);
28 void xen_arch_suspend(void);
30 void xen_reboot(int reason);
32 void xen_resume_notifier_register(struct notifier_block *nb);
33 void xen_resume_notifier_unregister(struct notifier_block *nb);
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);
42 int xen_setup_shutdown_event(void);
44 extern unsigned long *xen_contiguous_bitmap;
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);
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,
61 struct vm_area_struct;
63 #ifdef CONFIG_XEN_AUTO_XLATE
64 int xen_xlate_remap_gfn_array(struct vm_area_struct *vma,
66 xen_pfn_t *gfn, int nr,
67 int *err_ptr, pgprot_t prot,
70 int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma,
71 int nr, struct page **pages);
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.
77 static inline int xen_xlate_remap_gfn_array(struct vm_area_struct *vma,
79 xen_pfn_t *gfn, int nr,
80 int *err_ptr, pgprot_t prot,
87 static inline int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma,
88 int nr, struct page **pages)
94 int xen_remap_vma_range(struct vm_area_struct *vma, unsigned long addr,
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
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.
111 * Returns the number of successfully mapped frames, or a -ve error
114 static inline int xen_remap_domain_gfn_array(struct vm_area_struct *vma,
116 xen_pfn_t *gfn, int nr,
117 int *err_ptr, pgprot_t prot,
121 if (xen_feature(XENFEAT_auto_translated_physmap))
122 return xen_xlate_remap_gfn_array(vma, addr, gfn, nr, err_ptr,
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".
129 BUG_ON(err_ptr == NULL);
130 return xen_remap_pfn(vma, addr, gfn, nr, err_ptr, prot, domid,
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
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.
147 * Returns the number of successfully mapped frames, or a -ve error
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)
155 if (xen_feature(XENFEAT_auto_translated_physmap))
158 return xen_remap_pfn(vma, addr, mfn, nr, err_ptr, prot, domid,
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
171 * Returns the number of successfully mapped frames, or a -ve error
174 static inline int xen_remap_domain_gfn_range(struct vm_area_struct *vma,
176 xen_pfn_t gfn, int nr,
177 pgprot_t prot, unsigned int domid,
180 if (xen_feature(XENFEAT_auto_translated_physmap))
183 return xen_remap_pfn(vma, addr, &gfn, nr, NULL, prot, domid, false);
186 int xen_unmap_domain_gfn_range(struct vm_area_struct *vma,
187 int numpgs, struct page **pages);
189 int xen_xlate_map_ballooned_pages(xen_pfn_t **pfns, void **vaddr,
190 unsigned long nr_grant_frames);
192 bool xen_running_on_version_or_later(unsigned int major, unsigned int minor);
194 void xen_efi_runtime_setup(void);
197 #if defined(CONFIG_XEN_PV) && !defined(CONFIG_PREEMPTION)
199 DECLARE_PER_CPU(bool, xen_in_preemptible_hcall);
201 static inline void xen_preemptible_hcall_begin(void)
203 __this_cpu_write(xen_in_preemptible_hcall, true);
206 static inline void xen_preemptible_hcall_end(void)
208 __this_cpu_write(xen_in_preemptible_hcall, false);
213 static inline void xen_preemptible_hcall_begin(void) { }
214 static inline void xen_preemptible_hcall_end(void) { }
216 #endif /* CONFIG_XEN_PV && !CONFIG_PREEMPTION */
218 #ifdef CONFIG_XEN_GRANT_DMA_OPS
219 void xen_grant_setup_dma_ops(struct device *dev);
220 bool xen_is_grant_dma_device(struct device *dev);
221 bool xen_virtio_mem_acc(struct virtio_device *dev);
222 bool xen_virtio_restricted_mem_acc(struct virtio_device *dev);
224 static inline void xen_grant_setup_dma_ops(struct device *dev)
227 static inline bool xen_is_grant_dma_device(struct device *dev)
232 struct virtio_device;
234 static inline bool xen_virtio_mem_acc(struct virtio_device *dev)
239 static inline bool xen_virtio_restricted_mem_acc(struct virtio_device *dev)
243 #endif /* CONFIG_XEN_GRANT_DMA_OPS */
245 #endif /* INCLUDE_XEN_OPS_H */