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