include/xen/xen-ops.h

   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
  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 /* xen_remap_domain_gfn_range() - map a range of foreign frames
  90  * @vma:     VMA to map the pages into
  91  * @addr:    Address at which to map the pages
  92  * @gfn:     First GFN to map.
  93  * @nr:      Number frames to map
  94  * @prot:    page protection mask
  95  * @domid:   Domain owning the pages
  96  * @pages:   Array of pages if this domain has an auto-translated physmap
  97  *
  98  * Returns the number of successfully mapped frames, or a -ve error
  99  * code.
 100  */
 101 int xen_remap_domain_gfn_range(struct vm_area_struct *vma,
 102                                unsigned long addr,
 103                                xen_pfn_t gfn, int nr,
 104                                pgprot_t prot, unsigned domid,
 105                                struct page **pages);
 106 int xen_unmap_domain_gfn_range(struct vm_area_struct *vma,
 107                                int numpgs, struct page **pages);
 108
 109 #ifdef CONFIG_XEN_AUTO_XLATE
 110 int xen_xlate_remap_gfn_array(struct vm_area_struct *vma,
 111                               unsigned long addr,
 112                               xen_pfn_t *gfn, int nr,
 113                               int *err_ptr, pgprot_t prot,
 114                               unsigned domid,
 115                               struct page **pages);
 116 int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma,
 117                               int nr, struct page **pages);
 118 #else
 119 /*
 120  * These two functions are called from arch/x86/xen/mmu.c and so stubs
 121  * are needed for a configuration not specifying CONFIG_XEN_AUTO_XLATE.
 122  */
 123 static inline int xen_xlate_remap_gfn_array(struct vm_area_struct *vma,
 124                                             unsigned long addr,
 125                                             xen_pfn_t *gfn, int nr,
 126                                             int *err_ptr, pgprot_t prot,
 127                                             unsigned int domid,
 128                                             struct page **pages)
 129 {
 130         return -EOPNOTSUPP;
 131 }
 132
 133 static inline int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma,
 134                                             int nr, struct page **pages)
 135 {
 136         return -EOPNOTSUPP;
 137 }
 138 #endif
 139
 140 int xen_xlate_map_ballooned_pages(xen_pfn_t **pfns, void **vaddr,
 141                                   unsigned long nr_grant_frames);
 142
 143 bool xen_running_on_version_or_later(unsigned int major, unsigned int minor);
 144
 145 efi_status_t xen_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc);
 146 efi_status_t xen_efi_set_time(efi_time_t *tm);
 147 efi_status_t xen_efi_get_wakeup_time(efi_bool_t *enabled, efi_bool_t *pending,
 148                                      efi_time_t *tm);
 149 efi_status_t xen_efi_set_wakeup_time(efi_bool_t enabled, efi_time_t *tm);
 150 efi_status_t xen_efi_get_variable(efi_char16_t *name, efi_guid_t *vendor,
 151                                   u32 *attr, unsigned long *data_size,
 152                                   void *data);
 153 efi_status_t xen_efi_get_next_variable(unsigned long *name_size,
 154                                        efi_char16_t *name, efi_guid_t *vendor);
 155 efi_status_t xen_efi_set_variable(efi_char16_t *name, efi_guid_t *vendor,
 156                                   u32 attr, unsigned long data_size,
 157                                   void *data);
 158 efi_status_t xen_efi_query_variable_info(u32 attr, u64 *storage_space,
 159                                          u64 *remaining_space,
 160                                          u64 *max_variable_size);
 161 efi_status_t xen_efi_get_next_high_mono_count(u32 *count);
 162 efi_status_t xen_efi_update_capsule(efi_capsule_header_t **capsules,
 163                                     unsigned long count, unsigned long sg_list);
 164 efi_status_t xen_efi_query_capsule_caps(efi_capsule_header_t **capsules,
 165                                         unsigned long count, u64 *max_size,
 166                                         int *reset_type);
 167 void xen_efi_reset_system(int reset_type, efi_status_t status,
 168                           unsigned long data_size, efi_char16_t *data);
 169
 170
 171 #ifdef CONFIG_PREEMPT
 172
 173 static inline void xen_preemptible_hcall_begin(void)
 174 {
 175 }
 176
 177 static inline void xen_preemptible_hcall_end(void)
 178 {
 179 }
 180
 181 #else
 182
 183 DECLARE_PER_CPU(bool, xen_in_preemptible_hcall);
 184
 185 static inline void xen_preemptible_hcall_begin(void)
 186 {
 187         __this_cpu_write(xen_in_preemptible_hcall, true);
 188 }
 189
 190 static inline void xen_preemptible_hcall_end(void)
 191 {
 192         __this_cpu_write(xen_in_preemptible_hcall, false);
 193 }
 194
 195 #endif /* CONFIG_PREEMPT */
 196
 197 #endif /* INCLUDE_XEN_OPS_H */