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 */ 49