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 <xen/features.h> 9 #include <asm/xen/interface.h> 10 #include <xen/interface/vcpu.h> 11 12 DECLARE_PER_CPU(struct vcpu_info *, xen_vcpu); 13 14 DECLARE_PER_CPU(uint32_t, xen_vcpu_id); 15 static inline uint32_t xen_vcpu_nr(int cpu) 16 { 17 return per_cpu(xen_vcpu_id, cpu); 18 } 19 20 #define XEN_VCPU_ID_INVALID U32_MAX 21 22 void xen_arch_pre_suspend(void); 23 void xen_arch_post_suspend(int suspend_cancelled); 24 25 void xen_timer_resume(void); 26 void xen_arch_resume(void); 27 void xen_arch_suspend(void); 28 29 void xen_reboot(int reason); 30 31 void xen_resume_notifier_register(struct notifier_block *nb); 32 void xen_resume_notifier_unregister(struct notifier_block *nb); 33 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); 40 41 int xen_setup_shutdown_event(void); 42 43 extern unsigned long *xen_contiguous_bitmap; 44 45 #ifdef CONFIG_XEN_PV 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 50 void xen_destroy_contiguous_region(phys_addr_t pstart, unsigned int order); 51 52 int xen_remap_pfn(struct vm_area_struct *vma, unsigned long addr, 53 xen_pfn_t *pfn, int nr, int *err_ptr, pgprot_t prot, 54 unsigned int domid, bool no_translate, struct page **pages); 55 #else 56 static inline int xen_create_contiguous_region(phys_addr_t pstart, 57 unsigned int order, 58 unsigned int address_bits, 59 dma_addr_t *dma_handle) 60 { 61 return 0; 62 } 63 64 static inline void xen_destroy_contiguous_region(phys_addr_t pstart, 65 unsigned int order) { } 66 67 static inline int xen_remap_pfn(struct vm_area_struct *vma, unsigned long addr, 68 xen_pfn_t *pfn, int nr, int *err_ptr, 69 pgprot_t prot, unsigned int domid, 70 bool no_translate, struct page **pages) 71 { 72 BUG(); 73 return 0; 74 } 75 #endif 76 77 struct vm_area_struct; 78 79 #ifdef CONFIG_XEN_AUTO_XLATE 80 int 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 int domid, 85 struct page **pages); 86 int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma, 87 int nr, struct page **pages); 88 #else 89 /* 90 * These two functions are called from arch/x86/xen/mmu.c and so stubs 91 * are needed for a configuration not specifying CONFIG_XEN_AUTO_XLATE. 92 */ 93 static inline int xen_xlate_remap_gfn_array(struct vm_area_struct *vma, 94 unsigned long addr, 95 xen_pfn_t *gfn, int nr, 96 int *err_ptr, pgprot_t prot, 97 unsigned int domid, 98 struct page **pages) 99 { 100 return -EOPNOTSUPP; 101 } 102 103 static inline int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma, 104 int nr, struct page **pages) 105 { 106 return -EOPNOTSUPP; 107 } 108 #endif 109 110 /* 111 * xen_remap_domain_gfn_array() - map an array of foreign frames by gfn 112 * @vma: VMA to map the pages into 113 * @addr: Address at which to map the pages 114 * @gfn: Array of GFNs to map 115 * @nr: Number entries in the GFN array 116 * @err_ptr: Returns per-GFN error status. 117 * @prot: page protection mask 118 * @domid: Domain owning the pages 119 * @pages: Array of pages if this domain has an auto-translated physmap 120 * 121 * @gfn and @err_ptr may point to the same buffer, the GFNs will be 122 * overwritten by the error codes after they are mapped. 123 * 124 * Returns the number of successfully mapped frames, or a -ve error 125 * code. 126 */ 127 static inline int xen_remap_domain_gfn_array(struct vm_area_struct *vma, 128 unsigned long addr, 129 xen_pfn_t *gfn, int nr, 130 int *err_ptr, pgprot_t prot, 131 unsigned int domid, 132 struct page **pages) 133 { 134 if (xen_feature(XENFEAT_auto_translated_physmap)) 135 return xen_xlate_remap_gfn_array(vma, addr, gfn, nr, err_ptr, 136 prot, domid, pages); 137 138 /* We BUG_ON because it's a programmer error to pass a NULL err_ptr, 139 * and the consequences later is quite hard to detect what the actual 140 * cause of "wrong memory was mapped in". 141 */ 142 BUG_ON(err_ptr == NULL); 143 return xen_remap_pfn(vma, addr, gfn, nr, err_ptr, prot, domid, 144 false, pages); 145 } 146 147 /* 148 * xen_remap_domain_mfn_array() - map an array of foreign frames by mfn 149 * @vma: VMA to map the pages into 150 * @addr: Address at which to map the pages 151 * @mfn: Array of MFNs to map 152 * @nr: Number entries in the MFN array 153 * @err_ptr: Returns per-MFN error status. 154 * @prot: page protection mask 155 * @domid: Domain owning the pages 156 * @pages: Array of pages if this domain has an auto-translated physmap 157 * 158 * @mfn and @err_ptr may point to the same buffer, the MFNs will be 159 * overwritten by the error codes after they are mapped. 160 * 161 * Returns the number of successfully mapped frames, or a -ve error 162 * code. 163 */ 164 static inline int xen_remap_domain_mfn_array(struct vm_area_struct *vma, 165 unsigned long addr, xen_pfn_t *mfn, 166 int nr, int *err_ptr, 167 pgprot_t prot, unsigned int domid, 168 struct page **pages) 169 { 170 if (xen_feature(XENFEAT_auto_translated_physmap)) 171 return -EOPNOTSUPP; 172 173 return xen_remap_pfn(vma, addr, mfn, nr, err_ptr, prot, domid, 174 true, pages); 175 } 176 177 /* xen_remap_domain_gfn_range() - map a range of foreign frames 178 * @vma: VMA to map the pages into 179 * @addr: Address at which to map the pages 180 * @gfn: First GFN to map. 181 * @nr: Number frames to map 182 * @prot: page protection mask 183 * @domid: Domain owning the pages 184 * @pages: Array of pages if this domain has an auto-translated physmap 185 * 186 * Returns the number of successfully mapped frames, or a -ve error 187 * code. 188 */ 189 static inline int xen_remap_domain_gfn_range(struct vm_area_struct *vma, 190 unsigned long addr, 191 xen_pfn_t gfn, int nr, 192 pgprot_t prot, unsigned int domid, 193 struct page **pages) 194 { 195 if (xen_feature(XENFEAT_auto_translated_physmap)) 196 return -EOPNOTSUPP; 197 198 return xen_remap_pfn(vma, addr, &gfn, nr, NULL, prot, domid, false, 199 pages); 200 } 201 202 int xen_unmap_domain_gfn_range(struct vm_area_struct *vma, 203 int numpgs, struct page **pages); 204 205 int xen_xlate_map_ballooned_pages(xen_pfn_t **pfns, void **vaddr, 206 unsigned long nr_grant_frames); 207 208 bool xen_running_on_version_or_later(unsigned int major, unsigned int minor); 209 210 efi_status_t xen_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc); 211 efi_status_t xen_efi_set_time(efi_time_t *tm); 212 efi_status_t xen_efi_get_wakeup_time(efi_bool_t *enabled, efi_bool_t *pending, 213 efi_time_t *tm); 214 efi_status_t xen_efi_set_wakeup_time(efi_bool_t enabled, efi_time_t *tm); 215 efi_status_t xen_efi_get_variable(efi_char16_t *name, efi_guid_t *vendor, 216 u32 *attr, unsigned long *data_size, 217 void *data); 218 efi_status_t xen_efi_get_next_variable(unsigned long *name_size, 219 efi_char16_t *name, efi_guid_t *vendor); 220 efi_status_t xen_efi_set_variable(efi_char16_t *name, efi_guid_t *vendor, 221 u32 attr, unsigned long data_size, 222 void *data); 223 efi_status_t xen_efi_query_variable_info(u32 attr, u64 *storage_space, 224 u64 *remaining_space, 225 u64 *max_variable_size); 226 efi_status_t xen_efi_get_next_high_mono_count(u32 *count); 227 efi_status_t xen_efi_update_capsule(efi_capsule_header_t **capsules, 228 unsigned long count, unsigned long sg_list); 229 efi_status_t xen_efi_query_capsule_caps(efi_capsule_header_t **capsules, 230 unsigned long count, u64 *max_size, 231 int *reset_type); 232 void xen_efi_reset_system(int reset_type, efi_status_t status, 233 unsigned long data_size, efi_char16_t *data); 234 235 236 #ifdef CONFIG_PREEMPT 237 238 static inline void xen_preemptible_hcall_begin(void) 239 { 240 } 241 242 static inline void xen_preemptible_hcall_end(void) 243 { 244 } 245 246 #else 247 248 DECLARE_PER_CPU(bool, xen_in_preemptible_hcall); 249 250 static inline void xen_preemptible_hcall_begin(void) 251 { 252 __this_cpu_write(xen_in_preemptible_hcall, true); 253 } 254 255 static inline void xen_preemptible_hcall_end(void) 256 { 257 __this_cpu_write(xen_in_preemptible_hcall, false); 258 } 259 260 #endif /* CONFIG_PREEMPT */ 261 262 #endif /* INCLUDE_XEN_OPS_H */ 263