include/asm-x86/tlbflush_64.h

   1 #ifndef _X86_TLBFLUSH_H
   2 #define _X86_TLBFLUSH_H
   3
   4 #include <linux/mm.h>
   5 #include <linux/sched.h>
   6
   7 #include <asm/processor.h>
   8 #include <asm/system.h>
   9
  10 #ifdef CONFIG_PARAVIRT
  11 #include <asm/paravirt.h>
  12 #else
  13 #define __flush_tlb() __native_flush_tlb()
  14 #define __flush_tlb_global() __native_flush_tlb_global()
  15 #define __flush_tlb_single(addr) __native_flush_tlb_single(addr)
  16 #endif
  17
  18 static inline void __native_flush_tlb(void)
  19 {
  20         write_cr3(read_cr3());
  21 }
  22
  23 static inline void __native_flush_tlb_global(void)
  24 {
  25         unsigned long cr4 = read_cr4();
  26
  27         /* clear PGE */
  28         write_cr4(cr4 & ~X86_CR4_PGE);
  29         /* write old PGE again and flush TLBs */
  30         write_cr4(cr4);
  31 }
  32
  33 static inline void __native_flush_tlb_single(unsigned long addr)
  34 {
  35         __asm__ __volatile__("invlpg (%0)" ::"r" (addr) : "memory");
  36 }
  37
  38 static inline void __flush_tlb_all(void)
  39 {
  40         if (cpu_has_pge)
  41                 __flush_tlb_global();
  42         else
  43                 __flush_tlb();
  44 }
  45
  46 static inline void __flush_tlb_one(unsigned long addr)
  47 {
  48         if (cpu_has_invlpg)
  49                 __flush_tlb_single(addr);
  50         else
  51                 __flush_tlb();
  52 }
  53
  54 /*
  55  * TLB flushing:
  56  *
  57  *  - flush_tlb() flushes the current mm struct TLBs
  58  *  - flush_tlb_all() flushes all processes TLBs
  59  *  - flush_tlb_mm(mm) flushes the specified mm context TLB's
  60  *  - flush_tlb_page(vma, vmaddr) flushes one page
  61  *  - flush_tlb_range(vma, start, end) flushes a range of pages
  62  *  - flush_tlb_kernel_range(start, end) flushes a range of kernel pages
  63  *
  64  * x86-64 can only flush individual pages or full VMs. For a range flush
  65  * we always do the full VM. Might be worth trying if for a small
  66  * range a few INVLPGs in a row are a win.
  67  */
  68
  69 #define TLB_FLUSH_ALL   -1ULL
  70
  71 #ifndef CONFIG_SMP
  72
  73 #define flush_tlb() __flush_tlb()
  74 #define flush_tlb_all() __flush_tlb_all()
  75 #define local_flush_tlb() __flush_tlb()
  76
  77 static inline void flush_tlb_mm(struct mm_struct *mm)
  78 {
  79         if (mm == current->active_mm)
  80                 __flush_tlb();
  81 }
  82
  83 static inline void flush_tlb_page(struct vm_area_struct *vma,
  84                                   unsigned long addr)
  85 {
  86         if (vma->vm_mm == current->active_mm)
  87                 __flush_tlb_one(addr);
  88 }
  89
  90 static inline void flush_tlb_range(struct vm_area_struct *vma,
  91                                    unsigned long start, unsigned long end)
  92 {
  93         if (vma->vm_mm == current->active_mm)
  94                 __flush_tlb();
  95 }
  96
  97 static inline void native_flush_tlb_others(const cpumask_t *cpumask,
  98                                            struct mm_struct *mm,
  99                                            unsigned long va)
 100 {
 101 }
 102
 103 #else  /* SMP */
 104
 105 #include <asm/smp.h>
 106
 107 #define local_flush_tlb() __flush_tlb()
 108
 109 extern void flush_tlb_all(void);
 110 extern void flush_tlb_current_task(void);
 111 extern void flush_tlb_mm(struct mm_struct *);
 112 extern void flush_tlb_page(struct vm_area_struct *, unsigned long);
 113
 114 #define flush_tlb()     flush_tlb_current_task()
 115
 116 static inline void flush_tlb_range(struct vm_area_struct *vma,
 117                                    unsigned long start, unsigned long end)
 118 {
 119         flush_tlb_mm(vma->vm_mm);
 120 }
 121
 122 void native_flush_tlb_others(const cpumask_t *cpumask, struct mm_struct *mm,
 123                              unsigned long va);
 124
 125 #define TLBSTATE_OK     1
 126 #define TLBSTATE_LAZY   2
 127
 128 #endif  /* SMP */
 129
 130 #ifndef CONFIG_PARAVIRT
 131 #define flush_tlb_others(mask, mm, va)  native_flush_tlb_others(&mask, mm, va)
 132 #endif
 133
 134 static inline void flush_tlb_kernel_range(unsigned long start,
 135                                           unsigned long end)
 136 {
 137         flush_tlb_all();
 138 }
 139
 140 #endif /* _X86_TLBFLUSH_H */