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1 | #ifndef _X8664_TLBFLUSH_H | |
2 | #define _X8664_TLBFLUSH_H | |
3 | ||
4 | #include <linux/mm.h> | |
5 | #include <linux/sched.h> | |
6 | #include <asm/processor.h> | |
7 | #include <asm/system.h> | |
8 | ||
9 | static inline void __flush_tlb(void) | |
10 | { | |
11 | write_cr3(read_cr3()); | |
12 | } | |
13 | ||
14 | static inline void __flush_tlb_all(void) | |
15 | { | |
16 | unsigned long cr4 = read_cr4(); | |
17 | write_cr4(cr4 & ~X86_CR4_PGE); /* clear PGE */ | |
18 | write_cr4(cr4); /* write old PGE again and flush TLBs */ | |
19 | } | |
20 | ||
21 | #define __flush_tlb_one(addr) \ | |
22 | __asm__ __volatile__("invlpg (%0)" :: "r" (addr) : "memory") | |
23 | ||
24 | ||
25 | /* | |
26 | * TLB flushing: | |
27 | * | |
28 | * - flush_tlb() flushes the current mm struct TLBs | |
29 | * - flush_tlb_all() flushes all processes TLBs | |
30 | * - flush_tlb_mm(mm) flushes the specified mm context TLB's | |
31 | * - flush_tlb_page(vma, vmaddr) flushes one page | |
32 | * - flush_tlb_range(vma, start, end) flushes a range of pages | |
33 | * - flush_tlb_kernel_range(start, end) flushes a range of kernel pages | |
34 | * | |
35 | * x86-64 can only flush individual pages or full VMs. For a range flush | |
36 | * we always do the full VM. Might be worth trying if for a small | |
37 | * range a few INVLPGs in a row are a win. | |
38 | */ | |
39 | ||
40 | #ifndef CONFIG_SMP | |
41 | ||
42 | #define flush_tlb() __flush_tlb() | |
43 | #define flush_tlb_all() __flush_tlb_all() | |
44 | #define local_flush_tlb() __flush_tlb() | |
45 | ||
46 | static inline void flush_tlb_mm(struct mm_struct *mm) | |
47 | { | |
48 | if (mm == current->active_mm) | |
49 | __flush_tlb(); | |
50 | } | |
51 | ||
52 | static inline void flush_tlb_page(struct vm_area_struct *vma, | |
53 | unsigned long addr) | |
54 | { | |
55 | if (vma->vm_mm == current->active_mm) | |
56 | __flush_tlb_one(addr); | |
57 | } | |
58 | ||
59 | static inline void flush_tlb_range(struct vm_area_struct *vma, | |
60 | unsigned long start, unsigned long end) | |
61 | { | |
62 | if (vma->vm_mm == current->active_mm) | |
63 | __flush_tlb(); | |
64 | } | |
65 | ||
66 | #else | |
67 | ||
68 | #include <asm/smp.h> | |
69 | ||
70 | #define local_flush_tlb() \ | |
71 | __flush_tlb() | |
72 | ||
73 | extern void flush_tlb_all(void); | |
74 | extern void flush_tlb_current_task(void); | |
75 | extern void flush_tlb_mm(struct mm_struct *); | |
76 | extern void flush_tlb_page(struct vm_area_struct *, unsigned long); | |
77 | ||
78 | #define flush_tlb() flush_tlb_current_task() | |
79 | ||
80 | static inline void flush_tlb_range(struct vm_area_struct * vma, unsigned long start, unsigned long end) | |
81 | { | |
82 | flush_tlb_mm(vma->vm_mm); | |
83 | } | |
84 | ||
85 | #define TLBSTATE_OK 1 | |
86 | #define TLBSTATE_LAZY 2 | |
87 | ||
88 | /* Roughly an IPI every 20MB with 4k pages for freeing page table | |
89 | ranges. Cost is about 42k of memory for each CPU. */ | |
90 | #define ARCH_FREE_PTE_NR 5350 | |
91 | ||
92 | #endif | |
93 | ||
94 | static inline void flush_tlb_kernel_range(unsigned long start, | |
95 | unsigned long end) | |
96 | { | |
97 | flush_tlb_all(); | |
98 | } | |
99 | ||
100 | #endif /* _X8664_TLBFLUSH_H */ |