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_get_runstate_snapshot(struct vcpu_runstate_info *res);
  37 u64 xen_steal_clock(int cpu);
  38
  39 int xen_setup_shutdown_event(void);
  40
  41 extern unsigned long *xen_contiguous_bitmap;
  42
  43 #if defined(CONFIG_XEN_PV) || defined(CONFIG_ARM) || defined(CONFIG_ARM64)
  44 int xen_create_contiguous_region(phys_addr_t pstart, unsigned int order,
  45                                 unsigned int address_bits,
  46                                 dma_addr_t *dma_handle);
  47
  48 void xen_destroy_contiguous_region(phys_addr_t pstart, unsigned int order);
  49 #else
  50 static inline int xen_create_contiguous_region(phys_addr_t pstart,
  51                                                unsigned int order,
  52                                                unsigned int address_bits,
  53                                                dma_addr_t *dma_handle)
  54 {
  55         return 0;
  56 }
  57
  58 static inline void xen_destroy_contiguous_region(phys_addr_t pstart,
  59                                                  unsigned int order) { }
  60 #endif
  61
  62 struct vm_area_struct;
  63
  64 /*
  65  * xen_remap_domain_gfn_array() - map an array of foreign frames
  66  * @vma:     VMA to map the pages into
  67  * @addr:    Address at which to map the pages
  68  * @gfn:     Array of GFNs to map
  69  * @nr:      Number entries in the GFN array
  70  * @err_ptr: Returns per-GFN error status.
  71  * @prot:    page protection mask
  72  * @domid:   Domain owning the pages
  73  * @pages:   Array of pages if this domain has an auto-translated physmap
  74  *
  75  * @gfn and @err_ptr may point to the same buffer, the GFNs will be
  76  * overwritten by the error codes after they are mapped.
  77  *
  78  * Returns the number of successfully mapped frames, or a -ve error
  79  * code.
  80  */
  81 int xen_remap_domain_gfn_array(struct vm_area_struct *vma,
  82                                unsigned long addr,
  83                                xen_pfn_t *gfn, int nr,
  84                                int *err_ptr, pgprot_t prot,
  85                                unsigned domid,
  86                                struct page **pages);
  87
  88 /* xen_remap_domain_gfn_range() - map a range of foreign frames
  89  * @vma:     VMA to map the pages into
  90  * @addr:    Address at which to map the pages
  91  * @gfn:     First GFN to map.
  92  * @nr:      Number frames to map
  93  * @prot:    page protection mask
  94  * @domid:   Domain owning the pages
  95  * @pages:   Array of pages if this domain has an auto-translated physmap
  96  *
  97  * Returns the number of successfully mapped frames, or a -ve error
  98  * code.
  99  */
 100 int xen_remap_domain_gfn_range(struct vm_area_struct *vma,
 101                                unsigned long addr,
 102                                xen_pfn_t gfn, int nr,
 103                                pgprot_t prot, unsigned domid,
 104                                struct page **pages);
 105 int xen_unmap_domain_gfn_range(struct vm_area_struct *vma,
 106                                int numpgs, struct page **pages);
 107 int xen_xlate_remap_gfn_array(struct vm_area_struct *vma,
 108                               unsigned long addr,
 109                               xen_pfn_t *gfn, int nr,
 110                               int *err_ptr, pgprot_t prot,
 111                               unsigned domid,
 112                               struct page **pages);
 113 int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma,
 114                               int nr, struct page **pages);
 115 int xen_xlate_map_ballooned_pages(xen_pfn_t **pfns, void **vaddr,
 116                                   unsigned long nr_grant_frames);
 117
 118 bool xen_running_on_version_or_later(unsigned int major, unsigned int minor);
 119
 120 efi_status_t xen_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc);
 121 efi_status_t xen_efi_set_time(efi_time_t *tm);
 122 efi_status_t xen_efi_get_wakeup_time(efi_bool_t *enabled, efi_bool_t *pending,
 123                                      efi_time_t *tm);
 124 efi_status_t xen_efi_set_wakeup_time(efi_bool_t enabled, efi_time_t *tm);
 125 efi_status_t xen_efi_get_variable(efi_char16_t *name, efi_guid_t *vendor,
 126                                   u32 *attr, unsigned long *data_size,
 127                                   void *data);
 128 efi_status_t xen_efi_get_next_variable(unsigned long *name_size,
 129                                        efi_char16_t *name, efi_guid_t *vendor);
 130 efi_status_t xen_efi_set_variable(efi_char16_t *name, efi_guid_t *vendor,
 131                                   u32 attr, unsigned long data_size,
 132                                   void *data);
 133 efi_status_t xen_efi_query_variable_info(u32 attr, u64 *storage_space,
 134                                          u64 *remaining_space,
 135                                          u64 *max_variable_size);
 136 efi_status_t xen_efi_get_next_high_mono_count(u32 *count);
 137 efi_status_t xen_efi_update_capsule(efi_capsule_header_t **capsules,
 138                                     unsigned long count, unsigned long sg_list);
 139 efi_status_t xen_efi_query_capsule_caps(efi_capsule_header_t **capsules,
 140                                         unsigned long count, u64 *max_size,
 141                                         int *reset_type);
 142 void xen_efi_reset_system(int reset_type, efi_status_t status,
 143                           unsigned long data_size, efi_char16_t *data);
 144
 145
 146 #ifdef CONFIG_PREEMPT
 147
 148 static inline void xen_preemptible_hcall_begin(void)
 149 {
 150 }
 151
 152 static inline void xen_preemptible_hcall_end(void)
 153 {
 154 }
 155
 156 #else
 157
 158 DECLARE_PER_CPU(bool, xen_in_preemptible_hcall);
 159
 160 static inline void xen_preemptible_hcall_begin(void)
 161 {
 162         __this_cpu_write(xen_in_preemptible_hcall, true);
 163 }
 164
 165 static inline void xen_preemptible_hcall_end(void)
 166 {
 167         __this_cpu_write(xen_in_preemptible_hcall, false);
 168 }
 169
 170 #endif /* CONFIG_PREEMPT */
 171
 172 #endif /* INCLUDE_XEN_OPS_H */