1
2
3
4
5
6
7
8#ifndef __ASM_TLB_H
9#define __ASM_TLB_H
10
11#include <linux/pagemap.h>
12#include <linux/swap.h>
13
14static inline void __tlb_remove_table(void *_table)
15{
16 free_page_and_swap_cache((struct page *)_table);
17}
18
19#define tlb_flush tlb_flush
20static void tlb_flush(struct mmu_gather *tlb);
21
22#include <asm-generic/tlb.h>
23
24
25
26
27
28
29static inline int tlb_get_level(struct mmu_gather *tlb)
30{
31
32 if (tlb->freed_tables)
33 return 0;
34
35 if (tlb->cleared_ptes && !(tlb->cleared_pmds ||
36 tlb->cleared_puds ||
37 tlb->cleared_p4ds))
38 return 3;
39
40 if (tlb->cleared_pmds && !(tlb->cleared_ptes ||
41 tlb->cleared_puds ||
42 tlb->cleared_p4ds))
43 return 2;
44
45 if (tlb->cleared_puds && !(tlb->cleared_ptes ||
46 tlb->cleared_pmds ||
47 tlb->cleared_p4ds))
48 return 1;
49
50 return 0;
51}
52
53static inline void tlb_flush(struct mmu_gather *tlb)
54{
55 struct vm_area_struct vma = TLB_FLUSH_VMA(tlb->mm, 0);
56 bool last_level = !tlb->freed_tables;
57 unsigned long stride = tlb_get_unmap_size(tlb);
58 int tlb_level = tlb_get_level(tlb);
59
60
61
62
63
64
65 if (tlb->fullmm) {
66 if (!last_level)
67 flush_tlb_mm(tlb->mm);
68 return;
69 }
70
71 __flush_tlb_range(&vma, tlb->start, tlb->end, stride,
72 last_level, tlb_level);
73}
74
75static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte,
76 unsigned long addr)
77{
78 pgtable_pte_page_dtor(pte);
79 tlb_remove_table(tlb, pte);
80}
81
82#if CONFIG_PGTABLE_LEVELS > 2
83static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmdp,
84 unsigned long addr)
85{
86 struct page *page = virt_to_page(pmdp);
87
88 pgtable_pmd_page_dtor(page);
89 tlb_remove_table(tlb, page);
90}
91#endif
92
93#if CONFIG_PGTABLE_LEVELS > 3
94static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pudp,
95 unsigned long addr)
96{
97 tlb_remove_table(tlb, virt_to_page(pudp));
98}
99#endif
100
101#endif
102