arch/x86/include/asm/mmu.h

   1 #ifndef _ASM_X86_MMU_H
   2 #define _ASM_X86_MMU_H
   3
   4 #include <linux/spinlock.h>
   5 #include <linux/mutex.h>
   6
   7 /*
   8  * The x86 doesn't have a mmu context, but
   9  * we put the segment information here.
  10  */
  11 typedef struct {
  12 #ifdef CONFIG_MODIFY_LDT_SYSCALL
  13         struct ldt_struct *ldt;
  14 #endif
  15
  16 #ifdef CONFIG_X86_64
  17         /* True if mm supports a task running in 32 bit compatibility mode. */
  18         unsigned short ia32_compat;
  19 #endif
  20
  21         struct mutex lock;
  22         void __user *vdso;                      /* vdso base address */
  23         const struct vdso_image *vdso_image;    /* vdso image in use */
  24
  25         atomic_t perf_rdpmc_allowed;    /* nonzero if rdpmc is allowed */
  26 #ifdef CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS
  27         /*
  28          * One bit per protection key says whether userspace can
  29          * use it or not.  protected by mmap_sem.
  30          */
  31         u16 pkey_allocation_map;
  32         s16 execute_only_pkey;
  33 #endif
  34 #ifdef CONFIG_X86_INTEL_MPX
  35         /* address of the bounds directory */
  36         void __user *bd_addr;
  37 #endif
  38 } mm_context_t;
  39
  40 #ifdef CONFIG_SMP
  41 void leave_mm(int cpu);
  42 #else
  43 static inline void leave_mm(int cpu)
  44 {
  45 }
  46 #endif
  47
  48 #endif /* _ASM_X86_MMU_H */