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 <xen/features.h>
9 #include <asm/xen/interface.h>
10 #include <xen/interface/vcpu.h>
12 DECLARE_PER_CPU(struct vcpu_info *, xen_vcpu);
14 DECLARE_PER_CPU(uint32_t, xen_vcpu_id);
15 static inline uint32_t xen_vcpu_nr(int cpu)
17 return per_cpu(xen_vcpu_id, cpu);
20 #define XEN_VCPU_ID_INVALID U32_MAX
22 void xen_arch_pre_suspend(void);
23 void xen_arch_post_suspend(int suspend_cancelled);
25 void xen_timer_resume(void);
26 void xen_arch_resume(void);
27 void xen_arch_suspend(void);
29 void xen_reboot(int reason);
31 void xen_resume_notifier_register(struct notifier_block *nb);
32 void xen_resume_notifier_unregister(struct notifier_block *nb);
34 bool xen_vcpu_stolen(int vcpu);
35 void xen_setup_runstate_info(int cpu);
36 void xen_time_setup_guest(void);
37 void xen_manage_runstate_time(int action);
38 void xen_get_runstate_snapshot(struct vcpu_runstate_info *res);
39 u64 xen_steal_clock(int cpu);
41 int xen_setup_shutdown_event(void);
43 extern unsigned long *xen_contiguous_bitmap;
45 #if defined(CONFIG_XEN_PV) || defined(CONFIG_ARM) || defined(CONFIG_ARM64)
46 int xen_create_contiguous_region(phys_addr_t pstart, unsigned int order,
47 unsigned int address_bits,
48 dma_addr_t *dma_handle);
49 void xen_destroy_contiguous_region(phys_addr_t pstart, unsigned int order);
52 #if defined(CONFIG_XEN_PV)
53 int xen_remap_pfn(struct vm_area_struct *vma, unsigned long addr,
54 xen_pfn_t *pfn, int nr, int *err_ptr, pgprot_t prot,
55 unsigned int domid, bool no_translate);
57 static inline int xen_remap_pfn(struct vm_area_struct *vma, unsigned long addr,
58 xen_pfn_t *pfn, int nr, int *err_ptr,
59 pgprot_t prot, unsigned int domid,
67 struct vm_area_struct;
69 #ifdef CONFIG_XEN_AUTO_XLATE
70 int xen_xlate_remap_gfn_array(struct vm_area_struct *vma,
72 xen_pfn_t *gfn, int nr,
73 int *err_ptr, pgprot_t prot,
76 int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma,
77 int nr, struct page **pages);
80 * These two functions are called from arch/x86/xen/mmu.c and so stubs
81 * are needed for a configuration not specifying CONFIG_XEN_AUTO_XLATE.
83 static inline int xen_xlate_remap_gfn_array(struct vm_area_struct *vma,
85 xen_pfn_t *gfn, int nr,
86 int *err_ptr, pgprot_t prot,
93 static inline int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma,
94 int nr, struct page **pages)
100 int xen_remap_vma_range(struct vm_area_struct *vma, unsigned long addr,
104 * xen_remap_domain_gfn_array() - map an array of foreign frames by gfn
105 * @vma: VMA to map the pages into
106 * @addr: Address at which to map the pages
107 * @gfn: Array of GFNs to map
108 * @nr: Number entries in the GFN array
109 * @err_ptr: Returns per-GFN error status.
110 * @prot: page protection mask
111 * @domid: Domain owning the pages
112 * @pages: Array of pages if this domain has an auto-translated physmap
114 * @gfn and @err_ptr may point to the same buffer, the GFNs will be
115 * overwritten by the error codes after they are mapped.
117 * Returns the number of successfully mapped frames, or a -ve error
120 static inline int xen_remap_domain_gfn_array(struct vm_area_struct *vma,
122 xen_pfn_t *gfn, int nr,
123 int *err_ptr, pgprot_t prot,
127 if (xen_feature(XENFEAT_auto_translated_physmap))
128 return xen_xlate_remap_gfn_array(vma, addr, gfn, nr, err_ptr,
131 /* We BUG_ON because it's a programmer error to pass a NULL err_ptr,
132 * and the consequences later is quite hard to detect what the actual
133 * cause of "wrong memory was mapped in".
135 BUG_ON(err_ptr == NULL);
136 return xen_remap_pfn(vma, addr, gfn, nr, err_ptr, prot, domid,
141 * xen_remap_domain_mfn_array() - map an array of foreign frames by mfn
142 * @vma: VMA to map the pages into
143 * @addr: Address at which to map the pages
144 * @mfn: Array of MFNs to map
145 * @nr: Number entries in the MFN array
146 * @err_ptr: Returns per-MFN error status.
147 * @prot: page protection mask
148 * @domid: Domain owning the pages
150 * @mfn and @err_ptr may point to the same buffer, the MFNs will be
151 * overwritten by the error codes after they are mapped.
153 * Returns the number of successfully mapped frames, or a -ve error
156 static inline int xen_remap_domain_mfn_array(struct vm_area_struct *vma,
157 unsigned long addr, xen_pfn_t *mfn,
158 int nr, int *err_ptr,
159 pgprot_t prot, unsigned int domid)
161 if (xen_feature(XENFEAT_auto_translated_physmap))
164 return xen_remap_pfn(vma, addr, mfn, nr, err_ptr, prot, domid,
168 /* xen_remap_domain_gfn_range() - map a range of foreign frames
169 * @vma: VMA to map the pages into
170 * @addr: Address at which to map the pages
171 * @gfn: First GFN to map.
172 * @nr: Number frames to map
173 * @prot: page protection mask
174 * @domid: Domain owning the pages
175 * @pages: Array of pages if this domain has an auto-translated physmap
177 * Returns the number of successfully mapped frames, or a -ve error
180 static inline int xen_remap_domain_gfn_range(struct vm_area_struct *vma,
182 xen_pfn_t gfn, int nr,
183 pgprot_t prot, unsigned int domid,
186 if (xen_feature(XENFEAT_auto_translated_physmap))
189 return xen_remap_pfn(vma, addr, &gfn, nr, NULL, prot, domid, false);
192 int xen_unmap_domain_gfn_range(struct vm_area_struct *vma,
193 int numpgs, struct page **pages);
195 int xen_xlate_map_ballooned_pages(xen_pfn_t **pfns, void **vaddr,
196 unsigned long nr_grant_frames);
198 bool xen_running_on_version_or_later(unsigned int major, unsigned int minor);
200 void xen_efi_runtime_setup(void);
203 #if defined(CONFIG_XEN_PV) && !defined(CONFIG_PREEMPTION)
205 DECLARE_PER_CPU(bool, xen_in_preemptible_hcall);
207 static inline void xen_preemptible_hcall_begin(void)
209 __this_cpu_write(xen_in_preemptible_hcall, true);
212 static inline void xen_preemptible_hcall_end(void)
214 __this_cpu_write(xen_in_preemptible_hcall, false);
219 static inline void xen_preemptible_hcall_begin(void) { }
220 static inline void xen_preemptible_hcall_end(void) { }
222 #endif /* CONFIG_XEN_PV && !CONFIG_PREEMPTION */
224 #endif /* INCLUDE_XEN_OPS_H */