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 <asm/xen/interface.h> 9 #include <xen/interface/vcpu.h> 10 11 DECLARE_PER_CPU(struct vcpu_info *, xen_vcpu); 12 13 DECLARE_PER_CPU(uint32_t, xen_vcpu_id); 14 static inline uint32_t xen_vcpu_nr(int cpu) 15 { 16 return per_cpu(xen_vcpu_id, cpu); 17 } 18 19 #define XEN_VCPU_ID_INVALID U32_MAX 20 21 void xen_arch_pre_suspend(void); 22 void xen_arch_post_suspend(int suspend_cancelled); 23 24 void xen_timer_resume(void); 25 void xen_arch_resume(void); 26 void xen_arch_suspend(void); 27 28 void xen_reboot(int reason); 29 30 void xen_resume_notifier_register(struct notifier_block *nb); 31 void xen_resume_notifier_unregister(struct notifier_block *nb); 32 33 bool xen_vcpu_stolen(int vcpu); 34 void xen_setup_runstate_info(int cpu); 35 void xen_time_setup_guest(void); 36 void xen_manage_runstate_time(int action); 37 void xen_get_runstate_snapshot(struct vcpu_runstate_info *res); 38 u64 xen_steal_clock(int cpu); 39 40 int xen_setup_shutdown_event(void); 41 42 extern unsigned long *xen_contiguous_bitmap; 43 44 #ifdef CONFIG_XEN_PV 45 int xen_create_contiguous_region(phys_addr_t pstart, unsigned int order, 46 unsigned int address_bits, 47 dma_addr_t *dma_handle); 48 49 void xen_destroy_contiguous_region(phys_addr_t pstart, unsigned int order); 50 #else 51 static inline int xen_create_contiguous_region(phys_addr_t pstart, 52 unsigned int order, 53 unsigned int address_bits, 54 dma_addr_t *dma_handle) 55 { 56 return 0; 57 } 58 59 static inline void xen_destroy_contiguous_region(phys_addr_t pstart, 60 unsigned int order) { } 61 #endif 62 63 struct vm_area_struct; 64 65 /* 66 * xen_remap_domain_gfn_array() - map an array of foreign frames by gfn 67 * @vma: VMA to map the pages into 68 * @addr: Address at which to map the pages 69 * @gfn: Array of GFNs to map 70 * @nr: Number entries in the GFN array 71 * @err_ptr: Returns per-GFN error status. 72 * @prot: page protection mask 73 * @domid: Domain owning the pages 74 * @pages: Array of pages if this domain has an auto-translated physmap 75 * 76 * @gfn and @err_ptr may point to the same buffer, the GFNs will be 77 * overwritten by the error codes after they are mapped. 78 * 79 * Returns the number of successfully mapped frames, or a -ve error 80 * code. 81 */ 82 int xen_remap_domain_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 domid, 87 struct page **pages); 88 89 /* 90 * xen_remap_domain_mfn_array() - map an array of foreign frames by mfn 91 * @vma: VMA to map the pages into 92 * @addr: Address at which to map the pages 93 * @mfn: Array of MFNs to map 94 * @nr: Number entries in the MFN array 95 * @err_ptr: Returns per-MFN error status. 96 * @prot: page protection mask 97 * @domid: Domain owning the pages 98 * @pages: Array of pages if this domain has an auto-translated physmap 99 * 100 * @mfn and @err_ptr may point to the same buffer, the MFNs will be 101 * overwritten by the error codes after they are mapped. 102 * 103 * Returns the number of successfully mapped frames, or a -ve error 104 * code. 105 */ 106 int xen_remap_domain_mfn_array(struct vm_area_struct *vma, 107 unsigned long addr, xen_pfn_t *mfn, int nr, 108 int *err_ptr, pgprot_t prot, 109 unsigned int domid, struct page **pages); 110 111 /* xen_remap_domain_gfn_range() - map a range of foreign frames 112 * @vma: VMA to map the pages into 113 * @addr: Address at which to map the pages 114 * @gfn: First GFN to map. 115 * @nr: Number frames to map 116 * @prot: page protection mask 117 * @domid: Domain owning the pages 118 * @pages: Array of pages if this domain has an auto-translated physmap 119 * 120 * Returns the number of successfully mapped frames, or a -ve error 121 * code. 122 */ 123 int xen_remap_domain_gfn_range(struct vm_area_struct *vma, 124 unsigned long addr, 125 xen_pfn_t gfn, int nr, 126 pgprot_t prot, unsigned domid, 127 struct page **pages); 128 int xen_unmap_domain_gfn_range(struct vm_area_struct *vma, 129 int numpgs, struct page **pages); 130 131 #ifdef CONFIG_XEN_AUTO_XLATE 132 int xen_xlate_remap_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 domid, 137 struct page **pages); 138 int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma, 139 int nr, struct page **pages); 140 #else 141 /* 142 * These two functions are called from arch/x86/xen/mmu.c and so stubs 143 * are needed for a configuration not specifying CONFIG_XEN_AUTO_XLATE. 144 */ 145 static inline int xen_xlate_remap_gfn_array(struct vm_area_struct *vma, 146 unsigned long addr, 147 xen_pfn_t *gfn, int nr, 148 int *err_ptr, pgprot_t prot, 149 unsigned int domid, 150 struct page **pages) 151 { 152 return -EOPNOTSUPP; 153 } 154 155 static inline int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma, 156 int nr, struct page **pages) 157 { 158 return -EOPNOTSUPP; 159 } 160 #endif 161 162 int xen_xlate_map_ballooned_pages(xen_pfn_t **pfns, void **vaddr, 163 unsigned long nr_grant_frames); 164 165 bool xen_running_on_version_or_later(unsigned int major, unsigned int minor); 166 167 efi_status_t xen_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc); 168 efi_status_t xen_efi_set_time(efi_time_t *tm); 169 efi_status_t xen_efi_get_wakeup_time(efi_bool_t *enabled, efi_bool_t *pending, 170 efi_time_t *tm); 171 efi_status_t xen_efi_set_wakeup_time(efi_bool_t enabled, efi_time_t *tm); 172 efi_status_t xen_efi_get_variable(efi_char16_t *name, efi_guid_t *vendor, 173 u32 *attr, unsigned long *data_size, 174 void *data); 175 efi_status_t xen_efi_get_next_variable(unsigned long *name_size, 176 efi_char16_t *name, efi_guid_t *vendor); 177 efi_status_t xen_efi_set_variable(efi_char16_t *name, efi_guid_t *vendor, 178 u32 attr, unsigned long data_size, 179 void *data); 180 efi_status_t xen_efi_query_variable_info(u32 attr, u64 *storage_space, 181 u64 *remaining_space, 182 u64 *max_variable_size); 183 efi_status_t xen_efi_get_next_high_mono_count(u32 *count); 184 efi_status_t xen_efi_update_capsule(efi_capsule_header_t **capsules, 185 unsigned long count, unsigned long sg_list); 186 efi_status_t xen_efi_query_capsule_caps(efi_capsule_header_t **capsules, 187 unsigned long count, u64 *max_size, 188 int *reset_type); 189 void xen_efi_reset_system(int reset_type, efi_status_t status, 190 unsigned long data_size, efi_char16_t *data); 191 192 193 #ifdef CONFIG_PREEMPT 194 195 static inline void xen_preemptible_hcall_begin(void) 196 { 197 } 198 199 static inline void xen_preemptible_hcall_end(void) 200 { 201 } 202 203 #else 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 #endif /* CONFIG_PREEMPT */ 218 219 #endif /* INCLUDE_XEN_OPS_H */ 220