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 int xen_remap_vma_range(struct vm_area_struct *vma, unsigned long addr, 113 unsigned long len); 114 115 /* 116 * xen_remap_domain_gfn_array() - map an array of foreign frames by gfn 117 * @vma: VMA to map the pages into 118 * @addr: Address at which to map the pages 119 * @gfn: Array of GFNs to map 120 * @nr: Number entries in the GFN array 121 * @err_ptr: Returns per-GFN error status. 122 * @prot: page protection mask 123 * @domid: Domain owning the pages 124 * @pages: Array of pages if this domain has an auto-translated physmap 125 * 126 * @gfn and @err_ptr may point to the same buffer, the GFNs will be 127 * overwritten by the error codes after they are mapped. 128 * 129 * Returns the number of successfully mapped frames, or a -ve error 130 * code. 131 */ 132 static inline int xen_remap_domain_gfn_array(struct vm_area_struct *vma, 133 unsigned long addr, 134 xen_pfn_t *gfn, int nr, 135 int *err_ptr, pgprot_t prot, 136 unsigned int domid, 137 struct page **pages) 138 { 139 if (xen_feature(XENFEAT_auto_translated_physmap)) 140 return xen_xlate_remap_gfn_array(vma, addr, gfn, nr, err_ptr, 141 prot, domid, pages); 142 143 /* We BUG_ON because it's a programmer error to pass a NULL err_ptr, 144 * and the consequences later is quite hard to detect what the actual 145 * cause of "wrong memory was mapped in". 146 */ 147 BUG_ON(err_ptr == NULL); 148 return xen_remap_pfn(vma, addr, gfn, nr, err_ptr, prot, domid, 149 false, pages); 150 } 151 152 /* 153 * xen_remap_domain_mfn_array() - map an array of foreign frames by mfn 154 * @vma: VMA to map the pages into 155 * @addr: Address at which to map the pages 156 * @mfn: Array of MFNs to map 157 * @nr: Number entries in the MFN array 158 * @err_ptr: Returns per-MFN error status. 159 * @prot: page protection mask 160 * @domid: Domain owning the pages 161 * @pages: Array of pages if this domain has an auto-translated physmap 162 * 163 * @mfn and @err_ptr may point to the same buffer, the MFNs will be 164 * overwritten by the error codes after they are mapped. 165 * 166 * Returns the number of successfully mapped frames, or a -ve error 167 * code. 168 */ 169 static inline int xen_remap_domain_mfn_array(struct vm_area_struct *vma, 170 unsigned long addr, xen_pfn_t *mfn, 171 int nr, int *err_ptr, 172 pgprot_t prot, unsigned int domid, 173 struct page **pages) 174 { 175 if (xen_feature(XENFEAT_auto_translated_physmap)) 176 return -EOPNOTSUPP; 177 178 return xen_remap_pfn(vma, addr, mfn, nr, err_ptr, prot, domid, 179 true, pages); 180 } 181 182 /* xen_remap_domain_gfn_range() - map a range of foreign frames 183 * @vma: VMA to map the pages into 184 * @addr: Address at which to map the pages 185 * @gfn: First GFN to map. 186 * @nr: Number frames to map 187 * @prot: page protection mask 188 * @domid: Domain owning the pages 189 * @pages: Array of pages if this domain has an auto-translated physmap 190 * 191 * Returns the number of successfully mapped frames, or a -ve error 192 * code. 193 */ 194 static inline int xen_remap_domain_gfn_range(struct vm_area_struct *vma, 195 unsigned long addr, 196 xen_pfn_t gfn, int nr, 197 pgprot_t prot, unsigned int domid, 198 struct page **pages) 199 { 200 if (xen_feature(XENFEAT_auto_translated_physmap)) 201 return -EOPNOTSUPP; 202 203 return xen_remap_pfn(vma, addr, &gfn, nr, NULL, prot, domid, false, 204 pages); 205 } 206 207 int xen_unmap_domain_gfn_range(struct vm_area_struct *vma, 208 int numpgs, struct page **pages); 209 210 int xen_xlate_map_ballooned_pages(xen_pfn_t **pfns, void **vaddr, 211 unsigned long nr_grant_frames); 212 213 bool xen_running_on_version_or_later(unsigned int major, unsigned int minor); 214 215 void xen_efi_runtime_setup(void); 216 217 218 #ifdef CONFIG_PREEMPT 219 220 static inline void xen_preemptible_hcall_begin(void) 221 { 222 } 223 224 static inline void xen_preemptible_hcall_end(void) 225 { 226 } 227 228 #else 229 230 DECLARE_PER_CPU(bool, xen_in_preemptible_hcall); 231 232 static inline void xen_preemptible_hcall_begin(void) 233 { 234 __this_cpu_write(xen_in_preemptible_hcall, true); 235 } 236 237 static inline void xen_preemptible_hcall_end(void) 238 { 239 __this_cpu_write(xen_in_preemptible_hcall, false); 240 } 241 242 #endif /* CONFIG_PREEMPT */ 243 244 #endif /* INCLUDE_XEN_OPS_H */ 245