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
  10 DECLARE_PER_CPU(struct vcpu_info *, xen_vcpu);
  11
  12 void xen_arch_pre_suspend(void);
  13 void xen_arch_post_suspend(int suspend_cancelled);
  14
  15 void xen_timer_resume(void);
  16 void xen_arch_resume(void);
  17 void xen_arch_suspend(void);
  18
  19 void xen_resume_notifier_register(struct notifier_block *nb);
  20 void xen_resume_notifier_unregister(struct notifier_block *nb);
  21
  22 bool xen_vcpu_stolen(int vcpu);
  23 void xen_setup_runstate_info(int cpu);
  24 void xen_get_runstate_snapshot(struct vcpu_runstate_info *res);
  25
  26 int xen_setup_shutdown_event(void);
  27
  28 extern unsigned long *xen_contiguous_bitmap;
  29 int xen_create_contiguous_region(phys_addr_t pstart, unsigned int order,
  30                                 unsigned int address_bits,
  31                                 dma_addr_t *dma_handle);
  32
  33 void xen_destroy_contiguous_region(phys_addr_t pstart, unsigned int order);
  34
  35 struct vm_area_struct;
  36
  37 /*
  38  * xen_remap_domain_gfn_array() - map an array of foreign frames
  39  * @vma:     VMA to map the pages into
  40  * @addr:    Address at which to map the pages
  41  * @gfn:     Array of GFNs to map
  42  * @nr:      Number entries in the GFN array
  43  * @err_ptr: Returns per-GFN error status.
  44  * @prot:    page protection mask
  45  * @domid:   Domain owning the pages
  46  * @pages:   Array of pages if this domain has an auto-translated physmap
  47  *
  48  * @gfn and @err_ptr may point to the same buffer, the GFNs will be
  49  * overwritten by the error codes after they are mapped.
  50  *
  51  * Returns the number of successfully mapped frames, or a -ve error
  52  * code.
  53  */
  54 int xen_remap_domain_gfn_array(struct vm_area_struct *vma,
  55                                unsigned long addr,
  56                                xen_pfn_t *gfn, int nr,
  57                                int *err_ptr, pgprot_t prot,
  58                                unsigned domid,
  59                                struct page **pages);
  60
  61 /* xen_remap_domain_gfn_range() - map a range of foreign frames
  62  * @vma:     VMA to map the pages into
  63  * @addr:    Address at which to map the pages
  64  * @gfn:     First GFN to map.
  65  * @nr:      Number frames to map
  66  * @prot:    page protection mask
  67  * @domid:   Domain owning the pages
  68  * @pages:   Array of pages if this domain has an auto-translated physmap
  69  *
  70  * Returns the number of successfully mapped frames, or a -ve error
  71  * code.
  72  */
  73 int xen_remap_domain_gfn_range(struct vm_area_struct *vma,
  74                                unsigned long addr,
  75                                xen_pfn_t gfn, int nr,
  76                                pgprot_t prot, unsigned domid,
  77                                struct page **pages);
  78 int xen_unmap_domain_gfn_range(struct vm_area_struct *vma,
  79                                int numpgs, struct page **pages);
  80 int xen_xlate_remap_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 int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma,
  87                               int nr, struct page **pages);
  88
  89 bool xen_running_on_version_or_later(unsigned int major, unsigned int minor);
  90
  91 #ifdef CONFIG_XEN_EFI
  92 extern efi_system_table_t *xen_efi_probe(void);
  93 #else
  94 static inline efi_system_table_t __init *xen_efi_probe(void)
  95 {
  96         return NULL;
  97 }
  98 #endif
  99
 100 #ifdef CONFIG_PREEMPT
 101
 102 static inline void xen_preemptible_hcall_begin(void)
 103 {
 104 }
 105
 106 static inline void xen_preemptible_hcall_end(void)
 107 {
 108 }
 109
 110 #else
 111
 112 DECLARE_PER_CPU(bool, xen_in_preemptible_hcall);
 113
 114 static inline void xen_preemptible_hcall_begin(void)
 115 {
 116         __this_cpu_write(xen_in_preemptible_hcall, true);
 117 }
 118
 119 static inline void xen_preemptible_hcall_end(void)
 120 {
 121         __this_cpu_write(xen_in_preemptible_hcall, false);
 122 }
 123
 124 #endif /* CONFIG_PREEMPT */
 125
 126 #endif /* INCLUDE_XEN_OPS_H */