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
   9 DECLARE_PER_CPU(struct vcpu_info *, xen_vcpu);
  10
  11 void xen_arch_pre_suspend(void);
  12 void xen_arch_post_suspend(int suspend_cancelled);
  13
  14 void xen_timer_resume(void);
  15 void xen_arch_resume(void);
  16
  17 void xen_resume_notifier_register(struct notifier_block *nb);
  18 void xen_resume_notifier_unregister(struct notifier_block *nb);
  19
  20 int xen_setup_shutdown_event(void);
  21
  22 extern unsigned long *xen_contiguous_bitmap;
  23 int xen_create_contiguous_region(phys_addr_t pstart, unsigned int order,
  24                                 unsigned int address_bits,
  25                                 dma_addr_t *dma_handle);
  26
  27 void xen_destroy_contiguous_region(phys_addr_t pstart, unsigned int order);
  28
  29 struct vm_area_struct;
  30
  31 /*
  32  * xen_remap_domain_mfn_array() - map an array of foreign frames
  33  * @vma:     VMA to map the pages into
  34  * @addr:    Address at which to map the pages
  35  * @gfn:     Array of GFNs to map
  36  * @nr:      Number entries in the GFN array
  37  * @err_ptr: Returns per-GFN error status.
  38  * @prot:    page protection mask
  39  * @domid:   Domain owning the pages
  40  * @pages:   Array of pages if this domain has an auto-translated physmap
  41  *
  42  * @gfn and @err_ptr may point to the same buffer, the GFNs will be
  43  * overwritten by the error codes after they are mapped.
  44  *
  45  * Returns the number of successfully mapped frames, or a -ve error
  46  * code.
  47  */
  48 int xen_remap_domain_mfn_array(struct vm_area_struct *vma,
  49                                unsigned long addr,
  50                                xen_pfn_t *gfn, int nr,
  51                                int *err_ptr, pgprot_t prot,
  52                                unsigned domid,
  53                                struct page **pages);
  54
  55 /* xen_remap_domain_mfn_range() - map a range of foreign frames
  56  * @vma:     VMA to map the pages into
  57  * @addr:    Address at which to map the pages
  58  * @gfn:     First GFN to map.
  59  * @nr:      Number frames to map
  60  * @prot:    page protection mask
  61  * @domid:   Domain owning the pages
  62  * @pages:   Array of pages if this domain has an auto-translated physmap
  63  *
  64  * Returns the number of successfully mapped frames, or a -ve error
  65  * code.
  66  */
  67 int xen_remap_domain_mfn_range(struct vm_area_struct *vma,
  68                                unsigned long addr,
  69                                xen_pfn_t gfn, int nr,
  70                                pgprot_t prot, unsigned domid,
  71                                struct page **pages);
  72 int xen_unmap_domain_mfn_range(struct vm_area_struct *vma,
  73                                int numpgs, struct page **pages);
  74 int xen_xlate_remap_gfn_array(struct vm_area_struct *vma,
  75                               unsigned long addr,
  76                               xen_pfn_t *gfn, int nr,
  77                               int *err_ptr, pgprot_t prot,
  78                               unsigned domid,
  79                               struct page **pages);
  80 int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma,
  81                               int nr, struct page **pages);
  82
  83 bool xen_running_on_version_or_later(unsigned int major, unsigned int minor);
  84
  85 #ifdef CONFIG_XEN_EFI
  86 extern efi_system_table_t *xen_efi_probe(void);
  87 #else
  88 static inline efi_system_table_t __init *xen_efi_probe(void)
  89 {
  90         return NULL;
  91 }
  92 #endif
  93
  94 #ifdef CONFIG_PREEMPT
  95
  96 static inline void xen_preemptible_hcall_begin(void)
  97 {
  98 }
  99
 100 static inline void xen_preemptible_hcall_end(void)
 101 {
 102 }
 103
 104 #else
 105
 106 DECLARE_PER_CPU(bool, xen_in_preemptible_hcall);
 107
 108 static inline void xen_preemptible_hcall_begin(void)
 109 {
 110         __this_cpu_write(xen_in_preemptible_hcall, true);
 111 }
 112
 113 static inline void xen_preemptible_hcall_end(void)
 114 {
 115         __this_cpu_write(xen_in_preemptible_hcall, false);
 116 }
 117
 118 #endif /* CONFIG_PREEMPT */
 119
 120 #endif /* INCLUDE_XEN_OPS_H */