LXR linux/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
  11DECLARE_PER_CPU(struct vcpu_info *, xen_vcpu);
  12
  13DECLARE_PER_CPU(uint32_t, xen_vcpu_id);
  14static 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
  21void xen_arch_pre_suspend(void);
  22void xen_arch_post_suspend(int suspend_cancelled);
  23
  24void xen_timer_resume(void);
  25void xen_arch_resume(void);
  26void xen_arch_suspend(void);
  27
  28void xen_reboot(int reason);
  29
  30void xen_resume_notifier_register(struct notifier_block *nb);
  31void xen_resume_notifier_unregister(struct notifier_block *nb);
  32
  33bool xen_vcpu_stolen(int vcpu);
  34void xen_setup_runstate_info(int cpu);
  35void xen_time_setup_guest(void);
  36void xen_get_runstate_snapshot(struct vcpu_runstate_info *res);
  37u64 xen_steal_clock(int cpu);
  38
  39int xen_setup_shutdown_event(void);
  40
  41extern unsigned long *xen_contiguous_bitmap;
  42
  43#ifdef CONFIG_XEN_PV
  44int xen_create_contiguous_region(phys_addr_t pstart, unsigned int order,
  45                                unsigned int address_bits,
  46                                dma_addr_t *dma_handle);
  47
  48void xen_destroy_contiguous_region(phys_addr_t pstart, unsigned int order);
  49#else
  50static 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
  58static inline void xen_destroy_contiguous_region(phys_addr_t pstart,
  59                                                 unsigned int order) { }
  60#endif
  61
  62struct 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 */
  81int 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 */
 100int 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);
 105int xen_unmap_domain_gfn_range(struct vm_area_struct *vma,
 106                               int numpgs, struct page **pages);
 107int 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);
 113int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma,
 114                              int nr, struct page **pages);
 115int xen_xlate_map_ballooned_pages(xen_pfn_t **pfns, void **vaddr,
 116                                  unsigned long nr_grant_frames);
 117
 118bool xen_running_on_version_or_later(unsigned int major, unsigned int minor);
 119
 120efi_status_t xen_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc);
 121efi_status_t xen_efi_set_time(efi_time_t *tm);
 122efi_status_t xen_efi_get_wakeup_time(efi_bool_t *enabled, efi_bool_t *pending,
 123                                     efi_time_t *tm);
 124efi_status_t xen_efi_set_wakeup_time(efi_bool_t enabled, efi_time_t *tm);
 125efi_status_t xen_efi_get_variable(efi_char16_t *name, efi_guid_t *vendor,
 126                                  u32 *attr, unsigned long *data_size,
 127                                  void *data);
 128efi_status_t xen_efi_get_next_variable(unsigned long *name_size,
 129                                       efi_char16_t *name, efi_guid_t *vendor);
 130efi_status_t xen_efi_set_variable(efi_char16_t *name, efi_guid_t *vendor,
 131                                  u32 attr, unsigned long data_size,
 132                                  void *data);
 133efi_status_t xen_efi_query_variable_info(u32 attr, u64 *storage_space,
 134                                         u64 *remaining_space,
 135                                         u64 *max_variable_size);
 136efi_status_t xen_efi_get_next_high_mono_count(u32 *count);
 137efi_status_t xen_efi_update_capsule(efi_capsule_header_t **capsules,
 138                                    unsigned long count, unsigned long sg_list);
 139efi_status_t xen_efi_query_capsule_caps(efi_capsule_header_t **capsules,
 140                                        unsigned long count, u64 *max_size,
 141                                        int *reset_type);
 142void 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
 148static inline void xen_preemptible_hcall_begin(void)
 149{
 150}
 151
 152static inline void xen_preemptible_hcall_end(void)
 153{
 154}
 155
 156#else
 157
 158DECLARE_PER_CPU(bool, xen_in_preemptible_hcall);
 159
 160static inline void xen_preemptible_hcall_begin(void)
 161{
 162        __this_cpu_write(xen_in_preemptible_hcall, true);
 163}
 164
 165static 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 */
 173