1 #ifndef _X8664_TLBFLUSH_H
2 #define _X8664_TLBFLUSH_H
5 #include <asm/processor.h>
7 static inline unsigned long get_cr3(void)
10 asm volatile("mov %%cr3,%0" : "=r" (cr3));
14 static inline void set_cr3(unsigned long cr3)
16 asm volatile("mov %0,%%cr3" :: "r" (cr3) : "memory");
19 static inline void __flush_tlb(void)
24 static inline unsigned long get_cr4(void)
27 asm volatile("mov %%cr4,%0" : "=r" (cr4));
31 static inline void set_cr4(unsigned long cr4)
33 asm volatile("mov %0,%%cr4" :: "r" (cr4) : "memory");
36 static inline void __flush_tlb_all(void)
38 unsigned long cr4 = get_cr4();
39 set_cr4(cr4 & ~X86_CR4_PGE); /* clear PGE */
40 set_cr4(cr4); /* write old PGE again and flush TLBs */
43 #define __flush_tlb_one(addr) \
44 __asm__ __volatile__("invlpg (%0)" :: "r" (addr) : "memory")
50 * - flush_tlb() flushes the current mm struct TLBs
51 * - flush_tlb_all() flushes all processes TLBs
52 * - flush_tlb_mm(mm) flushes the specified mm context TLB's
53 * - flush_tlb_page(vma, vmaddr) flushes one page
54 * - flush_tlb_range(vma, start, end) flushes a range of pages
55 * - flush_tlb_kernel_range(start, end) flushes a range of kernel pages
56 * - flush_tlb_pgtables(mm, start, end) flushes a range of page tables
58 * x86-64 can only flush individual pages or full VMs. For a range flush
59 * we always do the full VM. Might be worth trying if for a small
60 * range a few INVLPGs in a row are a win.
65 #define flush_tlb() __flush_tlb()
66 #define flush_tlb_all() __flush_tlb_all()
67 #define local_flush_tlb() __flush_tlb()
69 static inline void flush_tlb_mm(struct mm_struct *mm)
71 if (mm == current->active_mm)
75 static inline void flush_tlb_page(struct vm_area_struct *vma,
78 if (vma->vm_mm == current->active_mm)
79 __flush_tlb_one(addr);
82 static inline void flush_tlb_range(struct vm_area_struct *vma,
83 unsigned long start, unsigned long end)
85 if (vma->vm_mm == current->active_mm)
93 #define local_flush_tlb() \
96 extern void flush_tlb_all(void);
97 extern void flush_tlb_current_task(void);
98 extern void flush_tlb_mm(struct mm_struct *);
99 extern void flush_tlb_page(struct vm_area_struct *, unsigned long);
101 #define flush_tlb() flush_tlb_current_task()
103 static inline void flush_tlb_range(struct vm_area_struct * vma, unsigned long start, unsigned long end)
105 flush_tlb_mm(vma->vm_mm);
108 #define TLBSTATE_OK 1
109 #define TLBSTATE_LAZY 2
111 /* Roughly an IPI every 20MB with 4k pages for freeing page table
112 ranges. Cost is about 42k of memory for each CPU. */
113 #define ARCH_FREE_PTE_NR 5350
117 #define flush_tlb_kernel_range(start, end) flush_tlb_all()
119 static inline void flush_tlb_pgtables(struct mm_struct *mm,
120 unsigned long start, unsigned long end)
122 /* x86_64 does not keep any page table caches in a software TLB.
123 The CPUs do in their hardware TLBs, but they are handled
124 by the normal TLB flushing algorithms. */
127 #endif /* _X8664_TLBFLUSH_H */