LXR linux/include/xen/xen-ops.h

   1#ifndef INCLUDE_XEN_OPS_H
   2#define INCLUDE_XEN_OPS_H
   3
   4#include <linux/percpu.h>
   5#include <linux/notifier.h>
   6#include <linux/efi.h>
   7#include <asm/xen/interface.h>
   8#include <xen/interface/vcpu.h>
   9
  10DECLARE_PER_CPU(struct vcpu_info *, xen_vcpu);
  11
  12DECLARE_PER_CPU(uint32_t, xen_vcpu_id);
  13static inline uint32_t xen_vcpu_nr(int cpu)
  14{
  15        return per_cpu(xen_vcpu_id, cpu);
  16}
  17
  18#define XEN_VCPU_ID_INVALID U32_MAX
  19
  20void xen_arch_pre_suspend(void);
  21void xen_arch_post_suspend(int suspend_cancelled);
  22
  23void xen_timer_resume(void);
  24void xen_arch_resume(void);
  25void xen_arch_suspend(void);
  26
  27void xen_reboot(int reason);
  28
  29void xen_resume_notifier_register(struct notifier_block *nb);
  30void xen_resume_notifier_unregister(struct notifier_block *nb);
  31
  32bool xen_vcpu_stolen(int vcpu);
  33void xen_setup_runstate_info(int cpu);
  34void xen_time_setup_guest(void);
  35void xen_get_runstate_snapshot(struct vcpu_runstate_info *res);
  36u64 xen_steal_clock(int cpu);
  37
  38int xen_setup_shutdown_event(void);
  39
  40extern unsigned long *xen_contiguous_bitmap;
  41
  42#ifdef CONFIG_XEN_PV
  43int xen_create_contiguous_region(phys_addr_t pstart, unsigned int order,
  44                                unsigned int address_bits,
  45                                dma_addr_t *dma_handle);
  46
  47void xen_destroy_contiguous_region(phys_addr_t pstart, unsigned int order);
  48#else
  49static inline int xen_create_contiguous_region(phys_addr_t pstart,
  50                                               unsigned int order,
  51                                               unsigned int address_bits,
  52                                               dma_addr_t *dma_handle)
  53{
  54        return 0;
  55}
  56
  57static inline void xen_destroy_contiguous_region(phys_addr_t pstart,
  58                                                 unsigned int order) { }
  59#endif
  60
  61struct vm_area_struct;
  62
  63/*
  64 * xen_remap_domain_gfn_array() - map an array of foreign frames
  65 * @vma:     VMA to map the pages into
  66 * @addr:    Address at which to map the pages
  67 * @gfn:     Array of GFNs to map
  68 * @nr:      Number entries in the GFN array
  69 * @err_ptr: Returns per-GFN error status.
  70 * @prot:    page protection mask
  71 * @domid:   Domain owning the pages
  72 * @pages:   Array of pages if this domain has an auto-translated physmap
  73 *
  74 * @gfn and @err_ptr may point to the same buffer, the GFNs will be
  75 * overwritten by the error codes after they are mapped.
  76 *
  77 * Returns the number of successfully mapped frames, or a -ve error
  78 * code.
  79 */
  80int xen_remap_domain_gfn_array(struct vm_area_struct *vma,
  81                               unsigned long addr,
  82                               xen_pfn_t *gfn, int nr,
  83                               int *err_ptr, pgprot_t prot,
  84                               unsigned domid,
  85                               struct page **pages);
  86
  87/* xen_remap_domain_gfn_range() - map a range of foreign frames
  88 * @vma:     VMA to map the pages into
  89 * @addr:    Address at which to map the pages
  90 * @gfn:     First GFN to map.
  91 * @nr:      Number frames to map
  92 * @prot:    page protection mask
  93 * @domid:   Domain owning the pages
  94 * @pages:   Array of pages if this domain has an auto-translated physmap
  95 *
  96 * Returns the number of successfully mapped frames, or a -ve error
  97 * code.
  98 */
  99int xen_remap_domain_gfn_range(struct vm_area_struct *vma,
 100                               unsigned long addr,
 101                               xen_pfn_t gfn, int nr,
 102                               pgprot_t prot, unsigned domid,
 103                               struct page **pages);
 104int xen_unmap_domain_gfn_range(struct vm_area_struct *vma,
 105                               int numpgs, struct page **pages);
 106int xen_xlate_remap_gfn_array(struct vm_area_struct *vma,
 107                              unsigned long addr,
 108                              xen_pfn_t *gfn, int nr,
 109                              int *err_ptr, pgprot_t prot,
 110                              unsigned domid,
 111                              struct page **pages);
 112int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma,
 113                              int nr, struct page **pages);
 114int xen_xlate_map_ballooned_pages(xen_pfn_t **pfns, void **vaddr,
 115                                  unsigned long nr_grant_frames);
 116
 117bool xen_running_on_version_or_later(unsigned int major, unsigned int minor);
 118
 119efi_status_t xen_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc);
 120efi_status_t xen_efi_set_time(efi_time_t *tm);
 121efi_status_t xen_efi_get_wakeup_time(efi_bool_t *enabled, efi_bool_t *pending,
 122                                     efi_time_t *tm);
 123efi_status_t xen_efi_set_wakeup_time(efi_bool_t enabled, efi_time_t *tm);
 124efi_status_t xen_efi_get_variable(efi_char16_t *name, efi_guid_t *vendor,
 125                                  u32 *attr, unsigned long *data_size,
 126                                  void *data);
 127efi_status_t xen_efi_get_next_variable(unsigned long *name_size,
 128                                       efi_char16_t *name, efi_guid_t *vendor);
 129efi_status_t xen_efi_set_variable(efi_char16_t *name, efi_guid_t *vendor,
 130                                  u32 attr, unsigned long data_size,
 131                                  void *data);
 132efi_status_t xen_efi_query_variable_info(u32 attr, u64 *storage_space,
 133                                         u64 *remaining_space,
 134                                         u64 *max_variable_size);
 135efi_status_t xen_efi_get_next_high_mono_count(u32 *count);
 136efi_status_t xen_efi_update_capsule(efi_capsule_header_t **capsules,
 137                                    unsigned long count, unsigned long sg_list);
 138efi_status_t xen_efi_query_capsule_caps(efi_capsule_header_t **capsules,
 139                                        unsigned long count, u64 *max_size,
 140                                        int *reset_type);
 141void xen_efi_reset_system(int reset_type, efi_status_t status,
 142                          unsigned long data_size, efi_char16_t *data);
 143
 144
 145#ifdef CONFIG_PREEMPT
 146
 147static inline void xen_preemptible_hcall_begin(void)
 148{
 149}
 150
 151static inline void xen_preemptible_hcall_end(void)
 152{
 153}
 154
 155#else
 156
 157DECLARE_PER_CPU(bool, xen_in_preemptible_hcall);
 158
 159static inline void xen_preemptible_hcall_begin(void)
 160{
 161        __this_cpu_write(xen_in_preemptible_hcall, true);
 162}
 163
 164static inline void xen_preemptible_hcall_end(void)
 165{
 166        __this_cpu_write(xen_in_preemptible_hcall, false);
 167}
 168
 169#endif /* CONFIG_PREEMPT */
 170
 171#endif /* INCLUDE_XEN_OPS_H */
 172