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); 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) 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); 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 * 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. 152 * 153 * Returns the number of successfully mapped frames, or a -ve error 154 * code. 155 */ 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) 160 { 161 if (xen_feature(XENFEAT_auto_translated_physmap)) 162 return -EOPNOTSUPP; 163 164 return xen_remap_pfn(vma, addr, mfn, nr, err_ptr, prot, domid, 165 true); 166 } 167 168 /* 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 176 * 177 * Returns the number of successfully mapped frames, or a -ve error 178 * code. 179 */ 180 static inline int xen_remap_domain_gfn_range(struct vm_area_struct *vma, 181 unsigned long addr, 182 xen_pfn_t gfn, int nr, 183 pgprot_t prot, unsigned int domid, 184 struct page **pages) 185 { 186 if (xen_feature(XENFEAT_auto_translated_physmap)) 187 return -EOPNOTSUPP; 188 189 return xen_remap_pfn(vma, addr, &gfn, nr, NULL, prot, domid, false); 190 } 191 192 int xen_unmap_domain_gfn_range(struct vm_area_struct *vma, 193 int numpgs, struct page **pages); 194 195 int xen_xlate_map_ballooned_pages(xen_pfn_t **pfns, void **vaddr, 196 unsigned long nr_grant_frames); 197 198 bool xen_running_on_version_or_later(unsigned int major, unsigned int minor); 199 200 void xen_efi_runtime_setup(void); 201 202 203 #if defined(CONFIG_XEN_PV) && !defined(CONFIG_PREEMPTION) 204 205 DECLARE_PER_CPU(bool, xen_in_preemptible_hcall); 206 207 static inline void xen_preemptible_hcall_begin(void) 208 { 209 __this_cpu_write(xen_in_preemptible_hcall, true); 210 } 211 212 static inline void xen_preemptible_hcall_end(void) 213 { 214 __this_cpu_write(xen_in_preemptible_hcall, false); 215 } 216 217 #else 218 219 static inline void xen_preemptible_hcall_begin(void) { } 220 static inline void xen_preemptible_hcall_end(void) { } 221 222 #endif /* CONFIG_XEN_PV && !CONFIG_PREEMPTION */ 223 224 #endif /* INCLUDE_XEN_OPS_H */ 225