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 #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 50 void xen_destroy_contiguous_region(phys_addr_t pstart, unsigned int order); 51 #else 52 static inline int xen_create_contiguous_region(phys_addr_t pstart, 53 unsigned int order, 54 unsigned int address_bits, 55 dma_addr_t *dma_handle) 56 { 57 return 0; 58 } 59 60 static inline void xen_destroy_contiguous_region(phys_addr_t pstart, 61 unsigned int order) { } 62 #endif 63 64 #if defined(CONFIG_XEN_PV) 65 int xen_remap_pfn(struct vm_area_struct *vma, unsigned long addr, 66 xen_pfn_t *pfn, int nr, int *err_ptr, pgprot_t prot, 67 unsigned int domid, bool no_translate, struct page **pages); 68 #else 69 static inline int xen_remap_pfn(struct vm_area_struct *vma, unsigned long addr, 70 xen_pfn_t *pfn, int nr, int *err_ptr, 71 pgprot_t prot, unsigned int domid, 72 bool no_translate, struct page **pages) 73 { 74 BUG(); 75 return 0; 76 } 77 #endif 78 79 struct vm_area_struct; 80 81 #ifdef CONFIG_XEN_AUTO_XLATE 82 int xen_xlate_remap_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 int domid, 87 struct page **pages); 88 int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma, 89 int nr, struct page **pages); 90 #else 91 /* 92 * These two functions are called from arch/x86/xen/mmu.c and so stubs 93 * are needed for a configuration not specifying CONFIG_XEN_AUTO_XLATE. 94 */ 95 static inline int xen_xlate_remap_gfn_array(struct vm_area_struct *vma, 96 unsigned long addr, 97 xen_pfn_t *gfn, int nr, 98 int *err_ptr, pgprot_t prot, 99 unsigned int domid, 100 struct page **pages) 101 { 102 return -EOPNOTSUPP; 103 } 104 105 static inline int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma, 106 int nr, struct page **pages) 107 { 108 return -EOPNOTSUPP; 109 } 110 #endif 111 112 /* 113 * xen_remap_domain_gfn_array() - map an array of foreign frames by gfn 114 * @vma: VMA to map the pages into 115 * @addr: Address at which to map the pages 116 * @gfn: Array of GFNs to map 117 * @nr: Number entries in the GFN array 118 * @err_ptr: Returns per-GFN error status. 119 * @prot: page protection mask 120 * @domid: Domain owning the pages 121 * @pages: Array of pages if this domain has an auto-translated physmap 122 * 123 * @gfn and @err_ptr may point to the same buffer, the GFNs will be 124 * overwritten by the error codes after they are mapped. 125 * 126 * Returns the number of successfully mapped frames, or a -ve error 127 * code. 128 */ 129 static inline int xen_remap_domain_gfn_array(struct vm_area_struct *vma, 130 unsigned long addr, 131 xen_pfn_t *gfn, int nr, 132 int *err_ptr, pgprot_t prot, 133 unsigned int domid, 134 struct page **pages) 135 { 136 if (xen_feature(XENFEAT_auto_translated_physmap)) 137 return xen_xlate_remap_gfn_array(vma, addr, gfn, nr, err_ptr, 138 prot, domid, pages); 139 140 /* We BUG_ON because it's a programmer error to pass a NULL err_ptr, 141 * and the consequences later is quite hard to detect what the actual 142 * cause of "wrong memory was mapped in". 143 */ 144 BUG_ON(err_ptr == NULL); 145 return xen_remap_pfn(vma, addr, gfn, nr, err_ptr, prot, domid, 146 false, pages); 147 } 148 149 /* 150 * xen_remap_domain_mfn_array() - map an array of foreign frames by mfn 151 * @vma: VMA to map the pages into 152 * @addr: Address at which to map the pages 153 * @mfn: Array of MFNs to map 154 * @nr: Number entries in the MFN array 155 * @err_ptr: Returns per-MFN error status. 156 * @prot: page protection mask 157 * @domid: Domain owning the pages 158 * @pages: Array of pages if this domain has an auto-translated physmap 159 * 160 * @mfn and @err_ptr may point to the same buffer, the MFNs will be 161 * overwritten by the error codes after they are mapped. 162 * 163 * Returns the number of successfully mapped frames, or a -ve error 164 * code. 165 */ 166 static inline int xen_remap_domain_mfn_array(struct vm_area_struct *vma, 167 unsigned long addr, xen_pfn_t *mfn, 168 int nr, int *err_ptr, 169 pgprot_t prot, unsigned int domid, 170 struct page **pages) 171 { 172 if (xen_feature(XENFEAT_auto_translated_physmap)) 173 return -EOPNOTSUPP; 174 175 return xen_remap_pfn(vma, addr, mfn, nr, err_ptr, prot, domid, 176 true, pages); 177 } 178 179 /* xen_remap_domain_gfn_range() - map a range of foreign frames 180 * @vma: VMA to map the pages into 181 * @addr: Address at which to map the pages 182 * @gfn: First GFN to map. 183 * @nr: Number frames to map 184 * @prot: page protection mask 185 * @domid: Domain owning the pages 186 * @pages: Array of pages if this domain has an auto-translated physmap 187 * 188 * Returns the number of successfully mapped frames, or a -ve error 189 * code. 190 */ 191 static inline int xen_remap_domain_gfn_range(struct vm_area_struct *vma, 192 unsigned long addr, 193 xen_pfn_t gfn, int nr, 194 pgprot_t prot, unsigned int domid, 195 struct page **pages) 196 { 197 if (xen_feature(XENFEAT_auto_translated_physmap)) 198 return -EOPNOTSUPP; 199 200 return xen_remap_pfn(vma, addr, &gfn, nr, NULL, prot, domid, false, 201 pages); 202 } 203 204 int xen_unmap_domain_gfn_range(struct vm_area_struct *vma, 205 int numpgs, struct page **pages); 206 207 int xen_xlate_map_ballooned_pages(xen_pfn_t **pfns, void **vaddr, 208 unsigned long nr_grant_frames); 209 210 bool xen_running_on_version_or_later(unsigned int major, unsigned int minor); 211 212 efi_status_t xen_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc); 213 efi_status_t xen_efi_set_time(efi_time_t *tm); 214 efi_status_t xen_efi_get_wakeup_time(efi_bool_t *enabled, efi_bool_t *pending, 215 efi_time_t *tm); 216 efi_status_t xen_efi_set_wakeup_time(efi_bool_t enabled, efi_time_t *tm); 217 efi_status_t xen_efi_get_variable(efi_char16_t *name, efi_guid_t *vendor, 218 u32 *attr, unsigned long *data_size, 219 void *data); 220 efi_status_t xen_efi_get_next_variable(unsigned long *name_size, 221 efi_char16_t *name, efi_guid_t *vendor); 222 efi_status_t xen_efi_set_variable(efi_char16_t *name, efi_guid_t *vendor, 223 u32 attr, unsigned long data_size, 224 void *data); 225 efi_status_t xen_efi_query_variable_info(u32 attr, u64 *storage_space, 226 u64 *remaining_space, 227 u64 *max_variable_size); 228 efi_status_t xen_efi_get_next_high_mono_count(u32 *count); 229 efi_status_t xen_efi_update_capsule(efi_capsule_header_t **capsules, 230 unsigned long count, unsigned long sg_list); 231 efi_status_t xen_efi_query_capsule_caps(efi_capsule_header_t **capsules, 232 unsigned long count, u64 *max_size, 233 int *reset_type); 234 void xen_efi_reset_system(int reset_type, efi_status_t status, 235 unsigned long data_size, efi_char16_t *data); 236 237 238 #ifdef CONFIG_PREEMPT 239 240 static inline void xen_preemptible_hcall_begin(void) 241 { 242 } 243 244 static inline void xen_preemptible_hcall_end(void) 245 { 246 } 247 248 #else 249 250 DECLARE_PER_CPU(bool, xen_in_preemptible_hcall); 251 252 static inline void xen_preemptible_hcall_begin(void) 253 { 254 __this_cpu_write(xen_in_preemptible_hcall, true); 255 } 256 257 static inline void xen_preemptible_hcall_end(void) 258 { 259 __this_cpu_write(xen_in_preemptible_hcall, false); 260 } 261 262 #endif /* CONFIG_PREEMPT */ 263 264 #endif /* INCLUDE_XEN_OPS_H */ 265