include/asm-x86_64/mach-xen/asm/mmu.h

   1 #ifndef __x86_64_MMU_H
   2 #define __x86_64_MMU_H
   3
   4 #include <linux/spinlock.h>
   5 #include <asm/semaphore.h>
   6
   7 /*
   8  * The x86_64 doesn't have a mmu context, but
   9  * we put the segment information here.
  10  *
  11  * cpu_vm_mask is used to optimize ldt flushing.
  12  */
  13 typedef struct {
  14         void *ldt;
  15         rwlock_t ldtlock;
  16         int size;
  17         struct semaphore sem;
  18 #ifdef CONFIG_XEN
  19         unsigned pinned:1;
  20         unsigned has_foreign_mappings:1;
  21         struct list_head unpinned;
  22 #endif
  23 } mm_context_t;
  24
  25 #ifdef CONFIG_XEN
  26 extern struct list_head mm_unpinned;
  27 extern spinlock_t mm_unpinned_lock;
  28
  29 /* mm/memory.c:exit_mmap hook */
  30 extern void _arch_exit_mmap(struct mm_struct *mm);
  31 #define arch_exit_mmap(_mm) _arch_exit_mmap(_mm)
  32
  33 /* kernel/fork.c:dup_mmap hook */
  34 extern void _arch_dup_mmap(struct mm_struct *mm);
  35 #define arch_dup_mmap(mm, oldmm) ((void)(oldmm), _arch_dup_mmap(mm))
  36 #endif
  37
  38 #endif