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 void xen_destroy_contiguous_region(phys_addr_t pstart, unsigned int order); 50 #endif 51 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, struct page **pages); 56 #else 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, 60 bool no_translate, struct page **pages) 61 { 62 BUG(); 63 return 0; 64 } 65 #endif 66 67 struct vm_area_struct; 68 69 #ifdef CONFIG_XEN_AUTO_XLATE 70 int xen_xlate_remap_gfn_array(struct vm_area_struct *vma, 71 unsigned long addr, 72 xen_pfn_t *gfn, int nr, 73 int *err_ptr, pgprot_t prot, 74 unsigned int domid, 75 struct page **pages); 76 int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma, 77 int nr, struct page **pages); 78 #else 79 /* 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. 82 */ 83 static inline int xen_xlate_remap_gfn_array(struct vm_area_struct *vma, 84 unsigned long addr, 85 xen_pfn_t *gfn, int nr, 86 int *err_ptr, pgprot_t prot, 87 unsigned int domid, 88 struct page **pages) 89 { 90 return -EOPNOTSUPP; 91 } 92 93 static inline int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma, 94 int nr, struct page **pages) 95 { 96 return -EOPNOTSUPP; 97 } 98 #endif 99 100 int xen_remap_vma_range(struct vm_area_struct *vma, unsigned long addr, 101 unsigned long len); 102 103 /* 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 113 * 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. 116 * 117 * Returns the number of successfully mapped frames, or a -ve error 118 * code. 119 */ 120 static inline int xen_remap_domain_gfn_array(struct vm_area_struct *vma, 121 unsigned long addr, 122 xen_pfn_t *gfn, int nr, 123 int *err_ptr, pgprot_t prot, 124 unsigned int domid, 125 struct page **pages) 126 { 127 if (xen_feature(XENFEAT_auto_translated_physmap)) 128 return xen_xlate_remap_gfn_array(vma, addr, gfn, nr, err_ptr, 129 prot, domid, pages); 130 131 /* 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". 134 */ 135 BUG_ON(err_ptr == NULL); 136 return xen_remap_pfn(vma, addr, gfn, nr, err_ptr, prot, domid, 137 false, pages); 138 } 139 140 /* 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 149 * @pages: Array of pages if this domain has an auto-translated physmap 150 * 151 * @mfn and @err_ptr may point to the same buffer, the MFNs will be 152 * overwritten by the error codes after they are mapped. 153 * 154 * Returns the number of successfully mapped frames, or a -ve error 155 * code. 156 */ 157 static inline int xen_remap_domain_mfn_array(struct vm_area_struct *vma, 158 unsigned long addr, xen_pfn_t *mfn, 159 int nr, int *err_ptr, 160 pgprot_t prot, unsigned int domid, 161 struct page **pages) 162 { 163 if (xen_feature(XENFEAT_auto_translated_physmap)) 164 return -EOPNOTSUPP; 165 166 return xen_remap_pfn(vma, addr, mfn, nr, err_ptr, prot, domid, 167 true, pages); 168 } 169 170 /* xen_remap_domain_gfn_range() - map a range of foreign frames 171 * @vma: VMA to map the pages into 172 * @addr: Address at which to map the pages 173 * @gfn: First GFN to map. 174 * @nr: Number frames to map 175 * @prot: page protection mask 176 * @domid: Domain owning the pages 177 * @pages: Array of pages if this domain has an auto-translated physmap 178 * 179 * Returns the number of successfully mapped frames, or a -ve error 180 * code. 181 */ 182 static inline int xen_remap_domain_gfn_range(struct vm_area_struct *vma, 183 unsigned long addr, 184 xen_pfn_t gfn, int nr, 185 pgprot_t prot, unsigned int domid, 186 struct page **pages) 187 { 188 if (xen_feature(XENFEAT_auto_translated_physmap)) 189 return -EOPNOTSUPP; 190 191 return xen_remap_pfn(vma, addr, &gfn, nr, NULL, prot, domid, false, 192 pages); 193 } 194 195 int xen_unmap_domain_gfn_range(struct vm_area_struct *vma, 196 int numpgs, struct page **pages); 197 198 int xen_xlate_map_ballooned_pages(xen_pfn_t **pfns, void **vaddr, 199 unsigned long nr_grant_frames); 200 201 bool xen_running_on_version_or_later(unsigned int major, unsigned int minor); 202 203 void xen_efi_runtime_setup(void); 204 205 206 #if defined(CONFIG_XEN_PV) && !defined(CONFIG_PREEMPTION) 207 208 DECLARE_PER_CPU(bool, xen_in_preemptible_hcall); 209 210 static inline void xen_preemptible_hcall_begin(void) 211 { 212 __this_cpu_write(xen_in_preemptible_hcall, true); 213 } 214 215 static inline void xen_preemptible_hcall_end(void) 216 { 217 __this_cpu_write(xen_in_preemptible_hcall, false); 218 } 219 220 #else 221 222 static inline void xen_preemptible_hcall_begin(void) { } 223 static inline void xen_preemptible_hcall_end(void) { } 224 225 #endif /* CONFIG_XEN_PV && !CONFIG_PREEMPTION */ 226 227 #endif /* INCLUDE_XEN_OPS_H */ 228