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Rev | Author | Line No. | Line |
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5270 | serge | 1 | #ifndef _ASM_X86_PGTABLE_H |
2 | #define _ASM_X86_PGTABLE_H |
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3 | |||
4 | #include |
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5 | #include |
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6 | |||
7 | #include |
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8 | |||
9 | /* |
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10 | * Macro to mark a page protection value as UC- |
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11 | */ |
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12 | #define pgprot_noncached(prot) \ |
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13 | ((boot_cpu_data.x86 > 3) \ |
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14 | ? (__pgprot(pgprot_val(prot) | \ |
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15 | cachemode2protval(_PAGE_CACHE_MODE_UC_MINUS))) \ |
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16 | : (prot)) |
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17 | |||
18 | #ifndef __ASSEMBLY__ |
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19 | #include |
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20 | |||
21 | void ptdump_walk_pgd_level(struct seq_file *m, pgd_t *pgd); |
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6082 | serge | 22 | void ptdump_walk_pgd_level_checkwx(void); |
5270 | serge | 23 | |
6082 | serge | 24 | #ifdef CONFIG_DEBUG_WX |
25 | #define debug_checkwx() ptdump_walk_pgd_level_checkwx() |
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26 | #else |
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27 | #define debug_checkwx() do { } while (0) |
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28 | #endif |
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29 | |||
5270 | serge | 30 | /* |
31 | * ZERO_PAGE is a global shared page that is always zero: used |
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32 | * for zero-mapped memory areas etc.. |
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33 | */ |
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34 | extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)] |
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35 | __visible; |
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36 | #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) |
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37 | |||
38 | extern spinlock_t pgd_lock; |
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39 | extern struct list_head pgd_list; |
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40 | |||
41 | extern struct mm_struct *pgd_page_get_mm(struct page *page); |
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42 | |||
43 | #ifdef CONFIG_PARAVIRT |
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44 | #include |
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45 | #else /* !CONFIG_PARAVIRT */ |
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46 | #define set_pte(ptep, pte) native_set_pte(ptep, pte) |
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47 | #define set_pte_at(mm, addr, ptep, pte) native_set_pte_at(mm, addr, ptep, pte) |
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48 | #define set_pmd_at(mm, addr, pmdp, pmd) native_set_pmd_at(mm, addr, pmdp, pmd) |
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49 | |||
50 | #define set_pte_atomic(ptep, pte) \ |
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51 | native_set_pte_atomic(ptep, pte) |
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52 | |||
53 | #define set_pmd(pmdp, pmd) native_set_pmd(pmdp, pmd) |
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54 | |||
55 | #ifndef __PAGETABLE_PUD_FOLDED |
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56 | #define set_pgd(pgdp, pgd) native_set_pgd(pgdp, pgd) |
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57 | #define pgd_clear(pgd) native_pgd_clear(pgd) |
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58 | #endif |
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59 | |||
60 | #ifndef set_pud |
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61 | # define set_pud(pudp, pud) native_set_pud(pudp, pud) |
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62 | #endif |
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63 | |||
64 | #ifndef __PAGETABLE_PMD_FOLDED |
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65 | #define pud_clear(pud) native_pud_clear(pud) |
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66 | #endif |
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67 | |||
68 | #define pte_clear(mm, addr, ptep) native_pte_clear(mm, addr, ptep) |
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69 | #define pmd_clear(pmd) native_pmd_clear(pmd) |
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70 | |||
71 | #define pte_update(mm, addr, ptep) do { } while (0) |
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72 | #define pte_update_defer(mm, addr, ptep) do { } while (0) |
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73 | #define pmd_update(mm, addr, ptep) do { } while (0) |
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74 | #define pmd_update_defer(mm, addr, ptep) do { } while (0) |
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75 | |||
76 | #define pgd_val(x) native_pgd_val(x) |
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77 | #define __pgd(x) native_make_pgd(x) |
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78 | |||
79 | #ifndef __PAGETABLE_PUD_FOLDED |
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80 | #define pud_val(x) native_pud_val(x) |
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81 | #define __pud(x) native_make_pud(x) |
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82 | #endif |
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83 | |||
84 | #ifndef __PAGETABLE_PMD_FOLDED |
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85 | #define pmd_val(x) native_pmd_val(x) |
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86 | #define __pmd(x) native_make_pmd(x) |
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87 | #endif |
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88 | |||
89 | #define pte_val(x) native_pte_val(x) |
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90 | #define __pte(x) native_make_pte(x) |
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91 | |||
92 | #define arch_end_context_switch(prev) do {} while(0) |
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93 | |||
94 | #endif /* CONFIG_PARAVIRT */ |
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95 | |||
96 | /* |
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97 | * The following only work if pte_present() is true. |
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98 | * Undefined behaviour if not.. |
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99 | */ |
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100 | static inline int pte_dirty(pte_t pte) |
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101 | { |
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102 | return pte_flags(pte) & _PAGE_DIRTY; |
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103 | } |
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104 | |||
105 | static inline int pte_young(pte_t pte) |
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106 | { |
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107 | return pte_flags(pte) & _PAGE_ACCESSED; |
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108 | } |
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109 | |||
110 | static inline int pmd_dirty(pmd_t pmd) |
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111 | { |
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112 | return pmd_flags(pmd) & _PAGE_DIRTY; |
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113 | } |
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114 | |||
115 | static inline int pmd_young(pmd_t pmd) |
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116 | { |
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117 | return pmd_flags(pmd) & _PAGE_ACCESSED; |
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118 | } |
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119 | |||
120 | static inline int pte_write(pte_t pte) |
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121 | { |
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122 | return pte_flags(pte) & _PAGE_RW; |
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123 | } |
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124 | |||
125 | static inline int pte_huge(pte_t pte) |
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126 | { |
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127 | return pte_flags(pte) & _PAGE_PSE; |
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128 | } |
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129 | |||
130 | static inline int pte_global(pte_t pte) |
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131 | { |
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132 | return pte_flags(pte) & _PAGE_GLOBAL; |
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133 | } |
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134 | |||
135 | static inline int pte_exec(pte_t pte) |
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136 | { |
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137 | return !(pte_flags(pte) & _PAGE_NX); |
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138 | } |
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139 | |||
140 | static inline int pte_special(pte_t pte) |
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141 | { |
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6082 | serge | 142 | return pte_flags(pte) & _PAGE_SPECIAL; |
5270 | serge | 143 | } |
144 | |||
145 | static inline unsigned long pte_pfn(pte_t pte) |
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146 | { |
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147 | return (pte_val(pte) & PTE_PFN_MASK) >> PAGE_SHIFT; |
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148 | } |
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149 | |||
150 | static inline unsigned long pmd_pfn(pmd_t pmd) |
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151 | { |
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6082 | serge | 152 | return (pmd_val(pmd) & pmd_pfn_mask(pmd)) >> PAGE_SHIFT; |
5270 | serge | 153 | } |
154 | |||
155 | static inline unsigned long pud_pfn(pud_t pud) |
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156 | { |
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6082 | serge | 157 | return (pud_val(pud) & pud_pfn_mask(pud)) >> PAGE_SHIFT; |
5270 | serge | 158 | } |
159 | |||
160 | #define pte_page(pte) pfn_to_page(pte_pfn(pte)) |
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161 | |||
162 | static inline int pmd_large(pmd_t pte) |
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163 | { |
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164 | return pmd_flags(pte) & _PAGE_PSE; |
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165 | } |
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166 | |||
167 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
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168 | static inline int pmd_trans_splitting(pmd_t pmd) |
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169 | { |
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170 | return pmd_val(pmd) & _PAGE_SPLITTING; |
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171 | } |
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172 | |||
173 | static inline int pmd_trans_huge(pmd_t pmd) |
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174 | { |
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175 | return pmd_val(pmd) & _PAGE_PSE; |
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176 | } |
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177 | |||
178 | static inline int has_transparent_hugepage(void) |
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179 | { |
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180 | return cpu_has_pse; |
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181 | } |
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182 | #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ |
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183 | |||
184 | static inline pte_t pte_set_flags(pte_t pte, pteval_t set) |
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185 | { |
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186 | pteval_t v = native_pte_val(pte); |
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187 | |||
188 | return native_make_pte(v | set); |
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189 | } |
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190 | |||
191 | static inline pte_t pte_clear_flags(pte_t pte, pteval_t clear) |
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192 | { |
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193 | pteval_t v = native_pte_val(pte); |
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194 | |||
195 | return native_make_pte(v & ~clear); |
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196 | } |
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197 | |||
198 | static inline pte_t pte_mkclean(pte_t pte) |
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199 | { |
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200 | return pte_clear_flags(pte, _PAGE_DIRTY); |
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201 | } |
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202 | |||
203 | static inline pte_t pte_mkold(pte_t pte) |
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204 | { |
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205 | return pte_clear_flags(pte, _PAGE_ACCESSED); |
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206 | } |
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207 | |||
208 | static inline pte_t pte_wrprotect(pte_t pte) |
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209 | { |
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210 | return pte_clear_flags(pte, _PAGE_RW); |
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211 | } |
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212 | |||
213 | static inline pte_t pte_mkexec(pte_t pte) |
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214 | { |
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215 | return pte_clear_flags(pte, _PAGE_NX); |
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216 | } |
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217 | |||
218 | static inline pte_t pte_mkdirty(pte_t pte) |
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219 | { |
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220 | return pte_set_flags(pte, _PAGE_DIRTY | _PAGE_SOFT_DIRTY); |
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221 | } |
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222 | |||
223 | static inline pte_t pte_mkyoung(pte_t pte) |
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224 | { |
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225 | return pte_set_flags(pte, _PAGE_ACCESSED); |
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226 | } |
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227 | |||
228 | static inline pte_t pte_mkwrite(pte_t pte) |
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229 | { |
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230 | return pte_set_flags(pte, _PAGE_RW); |
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231 | } |
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232 | |||
233 | static inline pte_t pte_mkhuge(pte_t pte) |
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234 | { |
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235 | return pte_set_flags(pte, _PAGE_PSE); |
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236 | } |
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237 | |||
238 | static inline pte_t pte_clrhuge(pte_t pte) |
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239 | { |
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240 | return pte_clear_flags(pte, _PAGE_PSE); |
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241 | } |
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242 | |||
243 | static inline pte_t pte_mkglobal(pte_t pte) |
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244 | { |
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245 | return pte_set_flags(pte, _PAGE_GLOBAL); |
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246 | } |
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247 | |||
248 | static inline pte_t pte_clrglobal(pte_t pte) |
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249 | { |
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250 | return pte_clear_flags(pte, _PAGE_GLOBAL); |
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251 | } |
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252 | |||
253 | static inline pte_t pte_mkspecial(pte_t pte) |
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254 | { |
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255 | return pte_set_flags(pte, _PAGE_SPECIAL); |
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256 | } |
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257 | |||
258 | static inline pmd_t pmd_set_flags(pmd_t pmd, pmdval_t set) |
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259 | { |
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260 | pmdval_t v = native_pmd_val(pmd); |
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261 | |||
262 | return __pmd(v | set); |
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263 | } |
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264 | |||
265 | static inline pmd_t pmd_clear_flags(pmd_t pmd, pmdval_t clear) |
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266 | { |
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267 | pmdval_t v = native_pmd_val(pmd); |
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268 | |||
269 | return __pmd(v & ~clear); |
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270 | } |
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271 | |||
272 | static inline pmd_t pmd_mkold(pmd_t pmd) |
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273 | { |
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274 | return pmd_clear_flags(pmd, _PAGE_ACCESSED); |
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275 | } |
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276 | |||
277 | static inline pmd_t pmd_wrprotect(pmd_t pmd) |
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278 | { |
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279 | return pmd_clear_flags(pmd, _PAGE_RW); |
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280 | } |
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281 | |||
282 | static inline pmd_t pmd_mkdirty(pmd_t pmd) |
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283 | { |
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284 | return pmd_set_flags(pmd, _PAGE_DIRTY | _PAGE_SOFT_DIRTY); |
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285 | } |
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286 | |||
287 | static inline pmd_t pmd_mkhuge(pmd_t pmd) |
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288 | { |
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289 | return pmd_set_flags(pmd, _PAGE_PSE); |
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290 | } |
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291 | |||
292 | static inline pmd_t pmd_mkyoung(pmd_t pmd) |
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293 | { |
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294 | return pmd_set_flags(pmd, _PAGE_ACCESSED); |
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295 | } |
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296 | |||
297 | static inline pmd_t pmd_mkwrite(pmd_t pmd) |
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298 | { |
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299 | return pmd_set_flags(pmd, _PAGE_RW); |
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300 | } |
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301 | |||
302 | static inline pmd_t pmd_mknotpresent(pmd_t pmd) |
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303 | { |
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6082 | serge | 304 | return pmd_clear_flags(pmd, _PAGE_PRESENT | _PAGE_PROTNONE); |
5270 | serge | 305 | } |
306 | |||
307 | #ifdef CONFIG_HAVE_ARCH_SOFT_DIRTY |
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308 | static inline int pte_soft_dirty(pte_t pte) |
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309 | { |
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310 | return pte_flags(pte) & _PAGE_SOFT_DIRTY; |
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311 | } |
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312 | |||
313 | static inline int pmd_soft_dirty(pmd_t pmd) |
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314 | { |
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315 | return pmd_flags(pmd) & _PAGE_SOFT_DIRTY; |
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316 | } |
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317 | |||
318 | static inline pte_t pte_mksoft_dirty(pte_t pte) |
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319 | { |
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320 | return pte_set_flags(pte, _PAGE_SOFT_DIRTY); |
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321 | } |
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322 | |||
323 | static inline pmd_t pmd_mksoft_dirty(pmd_t pmd) |
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324 | { |
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325 | return pmd_set_flags(pmd, _PAGE_SOFT_DIRTY); |
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326 | } |
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327 | |||
6082 | serge | 328 | static inline pte_t pte_clear_soft_dirty(pte_t pte) |
5270 | serge | 329 | { |
330 | return pte_clear_flags(pte, _PAGE_SOFT_DIRTY); |
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331 | } |
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332 | |||
6082 | serge | 333 | static inline pmd_t pmd_clear_soft_dirty(pmd_t pmd) |
5270 | serge | 334 | { |
6082 | serge | 335 | return pmd_clear_flags(pmd, _PAGE_SOFT_DIRTY); |
5270 | serge | 336 | } |
337 | |||
338 | #endif /* CONFIG_HAVE_ARCH_SOFT_DIRTY */ |
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339 | |||
340 | /* |
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341 | * Mask out unsupported bits in a present pgprot. Non-present pgprots |
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342 | * can use those bits for other purposes, so leave them be. |
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343 | */ |
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344 | static inline pgprotval_t massage_pgprot(pgprot_t pgprot) |
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345 | { |
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346 | pgprotval_t protval = pgprot_val(pgprot); |
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347 | |||
348 | if (protval & _PAGE_PRESENT) |
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349 | protval &= __supported_pte_mask; |
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350 | |||
351 | return protval; |
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352 | } |
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353 | |||
354 | static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot) |
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355 | { |
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356 | return __pte(((phys_addr_t)page_nr << PAGE_SHIFT) | |
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357 | massage_pgprot(pgprot)); |
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358 | } |
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359 | |||
360 | static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot) |
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361 | { |
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362 | return __pmd(((phys_addr_t)page_nr << PAGE_SHIFT) | |
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363 | massage_pgprot(pgprot)); |
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364 | } |
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365 | |||
366 | static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) |
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367 | { |
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368 | pteval_t val = pte_val(pte); |
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369 | |||
370 | /* |
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371 | * Chop off the NX bit (if present), and add the NX portion of |
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372 | * the newprot (if present): |
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373 | */ |
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374 | val &= _PAGE_CHG_MASK; |
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375 | val |= massage_pgprot(newprot) & ~_PAGE_CHG_MASK; |
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376 | |||
377 | return __pte(val); |
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378 | } |
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379 | |||
380 | static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot) |
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381 | { |
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382 | pmdval_t val = pmd_val(pmd); |
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383 | |||
384 | val &= _HPAGE_CHG_MASK; |
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385 | val |= massage_pgprot(newprot) & ~_HPAGE_CHG_MASK; |
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386 | |||
387 | return __pmd(val); |
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388 | } |
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389 | |||
390 | /* mprotect needs to preserve PAT bits when updating vm_page_prot */ |
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391 | #define pgprot_modify pgprot_modify |
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392 | static inline pgprot_t pgprot_modify(pgprot_t oldprot, pgprot_t newprot) |
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393 | { |
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394 | pgprotval_t preservebits = pgprot_val(oldprot) & _PAGE_CHG_MASK; |
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395 | pgprotval_t addbits = pgprot_val(newprot); |
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396 | return __pgprot(preservebits | addbits); |
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397 | } |
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398 | |||
6082 | serge | 399 | #define pte_pgprot(x) __pgprot(pte_flags(x)) |
400 | #define pmd_pgprot(x) __pgprot(pmd_flags(x)) |
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401 | #define pud_pgprot(x) __pgprot(pud_flags(x)) |
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5270 | serge | 402 | |
403 | #define canon_pgprot(p) __pgprot(massage_pgprot(p)) |
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404 | |||
405 | static inline int is_new_memtype_allowed(u64 paddr, unsigned long size, |
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406 | enum page_cache_mode pcm, |
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407 | enum page_cache_mode new_pcm) |
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408 | { |
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409 | /* |
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410 | * PAT type is always WB for untracked ranges, so no need to check. |
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411 | */ |
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412 | if (x86_platform.is_untracked_pat_range(paddr, paddr + size)) |
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413 | return 1; |
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414 | |||
415 | /* |
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416 | * Certain new memtypes are not allowed with certain |
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417 | * requested memtype: |
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418 | * - request is uncached, return cannot be write-back |
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419 | * - request is write-combine, return cannot be write-back |
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6082 | serge | 420 | * - request is write-through, return cannot be write-back |
421 | * - request is write-through, return cannot be write-combine |
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5270 | serge | 422 | */ |
423 | if ((pcm == _PAGE_CACHE_MODE_UC_MINUS && |
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424 | new_pcm == _PAGE_CACHE_MODE_WB) || |
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425 | (pcm == _PAGE_CACHE_MODE_WC && |
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6082 | serge | 426 | new_pcm == _PAGE_CACHE_MODE_WB) || |
427 | (pcm == _PAGE_CACHE_MODE_WT && |
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428 | new_pcm == _PAGE_CACHE_MODE_WB) || |
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429 | (pcm == _PAGE_CACHE_MODE_WT && |
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430 | new_pcm == _PAGE_CACHE_MODE_WC)) { |
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5270 | serge | 431 | return 0; |
432 | } |
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433 | |||
434 | return 1; |
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435 | } |
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436 | |||
437 | pmd_t *populate_extra_pmd(unsigned long vaddr); |
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438 | pte_t *populate_extra_pte(unsigned long vaddr); |
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439 | #endif /* __ASSEMBLY__ */ |
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440 | |||
441 | #ifdef CONFIG_X86_32 |
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442 | # include |
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443 | #else |
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444 | # include |
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445 | #endif |
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446 | |||
447 | #ifndef __ASSEMBLY__ |
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448 | //#include |
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449 | #include |
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450 | #include |
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451 | |||
452 | static inline int pte_none(pte_t pte) |
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453 | { |
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454 | return !pte.pte; |
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455 | } |
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456 | |||
457 | #define __HAVE_ARCH_PTE_SAME |
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458 | static inline int pte_same(pte_t a, pte_t b) |
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459 | { |
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460 | return a.pte == b.pte; |
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461 | } |
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462 | |||
463 | static inline int pte_present(pte_t a) |
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464 | { |
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465 | return pte_flags(a) & (_PAGE_PRESENT | _PAGE_PROTNONE); |
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466 | } |
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467 | |||
468 | #define pte_accessible pte_accessible |
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469 | static inline bool pte_accessible(struct mm_struct *mm, pte_t a) |
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470 | { |
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471 | if (pte_flags(a) & _PAGE_PRESENT) |
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472 | return true; |
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473 | |||
6082 | serge | 474 | if ((pte_flags(a) & _PAGE_PROTNONE) && |
5270 | serge | 475 | mm_tlb_flush_pending(mm)) |
476 | return true; |
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477 | |||
478 | return false; |
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479 | } |
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480 | |||
481 | static inline int pte_hidden(pte_t pte) |
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482 | { |
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483 | return pte_flags(pte) & _PAGE_HIDDEN; |
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484 | } |
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485 | |||
486 | static inline int pmd_present(pmd_t pmd) |
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487 | { |
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488 | /* |
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489 | * Checking for _PAGE_PSE is needed too because |
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490 | * split_huge_page will temporarily clear the present bit (but |
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491 | * the _PAGE_PSE flag will remain set at all times while the |
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492 | * _PAGE_PRESENT bit is clear). |
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493 | */ |
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6082 | serge | 494 | return pmd_flags(pmd) & (_PAGE_PRESENT | _PAGE_PROTNONE | _PAGE_PSE); |
5270 | serge | 495 | } |
496 | |||
6082 | serge | 497 | #ifdef CONFIG_NUMA_BALANCING |
498 | /* |
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499 | * These work without NUMA balancing but the kernel does not care. See the |
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500 | * comment in include/asm-generic/pgtable.h |
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501 | */ |
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502 | static inline int pte_protnone(pte_t pte) |
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503 | { |
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504 | return (pte_flags(pte) & (_PAGE_PROTNONE | _PAGE_PRESENT)) |
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505 | == _PAGE_PROTNONE; |
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506 | } |
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507 | |||
508 | static inline int pmd_protnone(pmd_t pmd) |
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509 | { |
||
510 | return (pmd_flags(pmd) & (_PAGE_PROTNONE | _PAGE_PRESENT)) |
||
511 | == _PAGE_PROTNONE; |
||
512 | } |
||
513 | #endif /* CONFIG_NUMA_BALANCING */ |
||
514 | |||
5270 | serge | 515 | static inline int pmd_none(pmd_t pmd) |
516 | { |
||
517 | /* Only check low word on 32-bit platforms, since it might be |
||
518 | out of sync with upper half. */ |
||
519 | return (unsigned long)native_pmd_val(pmd) == 0; |
||
520 | } |
||
521 | |||
522 | static inline unsigned long pmd_page_vaddr(pmd_t pmd) |
||
523 | { |
||
6082 | serge | 524 | return (unsigned long)__va(pmd_val(pmd) & pmd_pfn_mask(pmd)); |
5270 | serge | 525 | } |
526 | |||
527 | /* |
||
528 | * Currently stuck as a macro due to indirect forward reference to |
||
529 | * linux/mmzone.h's __section_mem_map_addr() definition: |
||
530 | */ |
||
6082 | serge | 531 | #define pmd_page(pmd) \ |
532 | pfn_to_page((pmd_val(pmd) & pmd_pfn_mask(pmd)) >> PAGE_SHIFT) |
||
5270 | serge | 533 | |
534 | /* |
||
535 | * the pmd page can be thought of an array like this: pmd_t[PTRS_PER_PMD] |
||
536 | * |
||
537 | * this macro returns the index of the entry in the pmd page which would |
||
538 | * control the given virtual address |
||
539 | */ |
||
540 | static inline unsigned long pmd_index(unsigned long address) |
||
541 | { |
||
542 | return (address >> PMD_SHIFT) & (PTRS_PER_PMD - 1); |
||
543 | } |
||
544 | |||
545 | /* |
||
546 | * Conversion functions: convert a page and protection to a page entry, |
||
547 | * and a page entry and page directory to the page they refer to. |
||
548 | * |
||
549 | * (Currently stuck as a macro because of indirect forward reference |
||
550 | * to linux/mm.h:page_to_nid()) |
||
551 | */ |
||
552 | #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) |
||
553 | |||
554 | /* |
||
555 | * the pte page can be thought of an array like this: pte_t[PTRS_PER_PTE] |
||
556 | * |
||
557 | * this function returns the index of the entry in the pte page which would |
||
558 | * control the given virtual address |
||
559 | */ |
||
560 | static inline unsigned long pte_index(unsigned long address) |
||
561 | { |
||
562 | return (address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1); |
||
563 | } |
||
564 | |||
565 | static inline pte_t *pte_offset_kernel(pmd_t *pmd, unsigned long address) |
||
566 | { |
||
567 | return (pte_t *)pmd_page_vaddr(*pmd) + pte_index(address); |
||
568 | } |
||
569 | |||
570 | static inline int pmd_bad(pmd_t pmd) |
||
571 | { |
||
572 | return (pmd_flags(pmd) & ~_PAGE_USER) != _KERNPG_TABLE; |
||
573 | } |
||
574 | |||
575 | static inline unsigned long pages_to_mb(unsigned long npg) |
||
576 | { |
||
577 | return npg >> (20 - PAGE_SHIFT); |
||
578 | } |
||
579 | |||
6082 | serge | 580 | #if CONFIG_PGTABLE_LEVELS > 2 |
5270 | serge | 581 | static inline int pud_none(pud_t pud) |
582 | { |
||
583 | return native_pud_val(pud) == 0; |
||
584 | } |
||
585 | |||
586 | static inline int pud_present(pud_t pud) |
||
587 | { |
||
588 | return pud_flags(pud) & _PAGE_PRESENT; |
||
589 | } |
||
590 | |||
591 | static inline unsigned long pud_page_vaddr(pud_t pud) |
||
592 | { |
||
6082 | serge | 593 | return (unsigned long)__va(pud_val(pud) & pud_pfn_mask(pud)); |
5270 | serge | 594 | } |
595 | |||
596 | /* |
||
597 | * Currently stuck as a macro due to indirect forward reference to |
||
598 | * linux/mmzone.h's __section_mem_map_addr() definition: |
||
599 | */ |
||
6082 | serge | 600 | #define pud_page(pud) \ |
601 | pfn_to_page((pud_val(pud) & pud_pfn_mask(pud)) >> PAGE_SHIFT) |
||
5270 | serge | 602 | |
603 | /* Find an entry in the second-level page table.. */ |
||
604 | static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address) |
||
605 | { |
||
606 | return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(address); |
||
607 | } |
||
608 | |||
609 | static inline int pud_large(pud_t pud) |
||
610 | { |
||
611 | return (pud_val(pud) & (_PAGE_PSE | _PAGE_PRESENT)) == |
||
612 | (_PAGE_PSE | _PAGE_PRESENT); |
||
613 | } |
||
614 | |||
615 | static inline int pud_bad(pud_t pud) |
||
616 | { |
||
617 | return (pud_flags(pud) & ~(_KERNPG_TABLE | _PAGE_USER)) != 0; |
||
618 | } |
||
619 | #else |
||
620 | static inline int pud_large(pud_t pud) |
||
621 | { |
||
622 | return 0; |
||
623 | } |
||
6082 | serge | 624 | #endif /* CONFIG_PGTABLE_LEVELS > 2 */ |
5270 | serge | 625 | |
6082 | serge | 626 | #if CONFIG_PGTABLE_LEVELS > 3 |
5270 | serge | 627 | static inline int pgd_present(pgd_t pgd) |
628 | { |
||
629 | return pgd_flags(pgd) & _PAGE_PRESENT; |
||
630 | } |
||
631 | |||
632 | static inline unsigned long pgd_page_vaddr(pgd_t pgd) |
||
633 | { |
||
634 | return (unsigned long)__va((unsigned long)pgd_val(pgd) & PTE_PFN_MASK); |
||
635 | } |
||
636 | |||
637 | /* |
||
638 | * Currently stuck as a macro due to indirect forward reference to |
||
639 | * linux/mmzone.h's __section_mem_map_addr() definition: |
||
640 | */ |
||
641 | #define pgd_page(pgd) pfn_to_page(pgd_val(pgd) >> PAGE_SHIFT) |
||
642 | |||
643 | /* to find an entry in a page-table-directory. */ |
||
644 | static inline unsigned long pud_index(unsigned long address) |
||
645 | { |
||
646 | return (address >> PUD_SHIFT) & (PTRS_PER_PUD - 1); |
||
647 | } |
||
648 | |||
649 | static inline pud_t *pud_offset(pgd_t *pgd, unsigned long address) |
||
650 | { |
||
651 | return (pud_t *)pgd_page_vaddr(*pgd) + pud_index(address); |
||
652 | } |
||
653 | |||
654 | static inline int pgd_bad(pgd_t pgd) |
||
655 | { |
||
656 | return (pgd_flags(pgd) & ~_PAGE_USER) != _KERNPG_TABLE; |
||
657 | } |
||
658 | |||
659 | static inline int pgd_none(pgd_t pgd) |
||
660 | { |
||
661 | return !native_pgd_val(pgd); |
||
662 | } |
||
6082 | serge | 663 | #endif /* CONFIG_PGTABLE_LEVELS > 3 */ |
5270 | serge | 664 | |
665 | #endif /* __ASSEMBLY__ */ |
||
666 | |||
667 | /* |
||
668 | * the pgd page can be thought of an array like this: pgd_t[PTRS_PER_PGD] |
||
669 | * |
||
670 | * this macro returns the index of the entry in the pgd page which would |
||
671 | * control the given virtual address |
||
672 | */ |
||
673 | #define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1)) |
||
674 | |||
675 | /* |
||
676 | * pgd_offset() returns a (pgd_t *) |
||
677 | * pgd_index() is used get the offset into the pgd page's array of pgd_t's; |
||
678 | */ |
||
679 | #define pgd_offset(mm, address) ((mm)->pgd + pgd_index((address))) |
||
680 | /* |
||
681 | * a shortcut which implies the use of the kernel's pgd, instead |
||
682 | * of a process's |
||
683 | */ |
||
684 | #define pgd_offset_k(address) pgd_offset(&init_mm, (address)) |
||
685 | |||
686 | |||
687 | #define KERNEL_PGD_BOUNDARY pgd_index(PAGE_OFFSET) |
||
688 | #define KERNEL_PGD_PTRS (PTRS_PER_PGD - KERNEL_PGD_BOUNDARY) |
||
689 | |||
690 | #ifndef __ASSEMBLY__ |
||
691 | |||
692 | extern int direct_gbpages; |
||
693 | void init_mem_mapping(void); |
||
694 | void early_alloc_pgt_buf(void); |
||
695 | |||
696 | /* local pte updates need not use xchg for locking */ |
||
697 | static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep) |
||
698 | { |
||
699 | pte_t res = *ptep; |
||
700 | |||
701 | /* Pure native function needs no input for mm, addr */ |
||
702 | native_pte_clear(NULL, 0, ptep); |
||
703 | return res; |
||
704 | } |
||
705 | |||
706 | static inline pmd_t native_local_pmdp_get_and_clear(pmd_t *pmdp) |
||
707 | { |
||
708 | pmd_t res = *pmdp; |
||
709 | |||
710 | native_pmd_clear(pmdp); |
||
711 | return res; |
||
712 | } |
||
713 | |||
714 | static inline void native_set_pte_at(struct mm_struct *mm, unsigned long addr, |
||
715 | pte_t *ptep , pte_t pte) |
||
716 | { |
||
717 | native_set_pte(ptep, pte); |
||
718 | } |
||
719 | |||
720 | static inline void native_set_pmd_at(struct mm_struct *mm, unsigned long addr, |
||
721 | pmd_t *pmdp , pmd_t pmd) |
||
722 | { |
||
723 | native_set_pmd(pmdp, pmd); |
||
724 | } |
||
725 | |||
726 | #ifndef CONFIG_PARAVIRT |
||
727 | /* |
||
728 | * Rules for using pte_update - it must be called after any PTE update which |
||
729 | * has not been done using the set_pte / clear_pte interfaces. It is used by |
||
730 | * shadow mode hypervisors to resynchronize the shadow page tables. Kernel PTE |
||
731 | * updates should either be sets, clears, or set_pte_atomic for P->P |
||
732 | * transitions, which means this hook should only be called for user PTEs. |
||
733 | * This hook implies a P->P protection or access change has taken place, which |
||
734 | * requires a subsequent TLB flush. The notification can optionally be delayed |
||
735 | * until the TLB flush event by using the pte_update_defer form of the |
||
736 | * interface, but care must be taken to assure that the flush happens while |
||
737 | * still holding the same page table lock so that the shadow and primary pages |
||
738 | * do not become out of sync on SMP. |
||
739 | */ |
||
740 | #define pte_update(mm, addr, ptep) do { } while (0) |
||
741 | #define pte_update_defer(mm, addr, ptep) do { } while (0) |
||
742 | #endif |
||
743 | |||
744 | /* |
||
745 | * We only update the dirty/accessed state if we set |
||
746 | * the dirty bit by hand in the kernel, since the hardware |
||
747 | * will do the accessed bit for us, and we don't want to |
||
748 | * race with other CPU's that might be updating the dirty |
||
749 | * bit at the same time. |
||
750 | */ |
||
751 | struct vm_area_struct; |
||
752 | |||
753 | #define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS |
||
754 | extern int ptep_set_access_flags(struct vm_area_struct *vma, |
||
755 | unsigned long address, pte_t *ptep, |
||
756 | pte_t entry, int dirty); |
||
757 | |||
758 | #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG |
||
759 | extern int ptep_test_and_clear_young(struct vm_area_struct *vma, |
||
760 | unsigned long addr, pte_t *ptep); |
||
761 | |||
762 | #define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH |
||
763 | extern int ptep_clear_flush_young(struct vm_area_struct *vma, |
||
764 | unsigned long address, pte_t *ptep); |
||
765 | |||
766 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR |
||
767 | static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, |
||
768 | pte_t *ptep) |
||
769 | { |
||
770 | pte_t pte = native_ptep_get_and_clear(ptep); |
||
771 | pte_update(mm, addr, ptep); |
||
772 | return pte; |
||
773 | } |
||
774 | |||
775 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL |
||
776 | static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, |
||
777 | unsigned long addr, pte_t *ptep, |
||
778 | int full) |
||
779 | { |
||
780 | pte_t pte; |
||
781 | if (full) { |
||
782 | /* |
||
783 | * Full address destruction in progress; paravirt does not |
||
784 | * care about updates and native needs no locking |
||
785 | */ |
||
786 | pte = native_local_ptep_get_and_clear(ptep); |
||
787 | } else { |
||
788 | pte = ptep_get_and_clear(mm, addr, ptep); |
||
789 | } |
||
790 | return pte; |
||
791 | } |
||
792 | |||
793 | #define __HAVE_ARCH_PTEP_SET_WRPROTECT |
||
794 | static inline void ptep_set_wrprotect(struct mm_struct *mm, |
||
795 | unsigned long addr, pte_t *ptep) |
||
796 | { |
||
797 | clear_bit(_PAGE_BIT_RW, (unsigned long *)&ptep->pte); |
||
798 | pte_update(mm, addr, ptep); |
||
799 | } |
||
800 | |||
801 | #define flush_tlb_fix_spurious_fault(vma, address) do { } while (0) |
||
802 | |||
803 | #define mk_pmd(page, pgprot) pfn_pmd(page_to_pfn(page), (pgprot)) |
||
804 | |||
805 | #define __HAVE_ARCH_PMDP_SET_ACCESS_FLAGS |
||
806 | extern int pmdp_set_access_flags(struct vm_area_struct *vma, |
||
807 | unsigned long address, pmd_t *pmdp, |
||
808 | pmd_t entry, int dirty); |
||
809 | |||
810 | #define __HAVE_ARCH_PMDP_TEST_AND_CLEAR_YOUNG |
||
811 | extern int pmdp_test_and_clear_young(struct vm_area_struct *vma, |
||
812 | unsigned long addr, pmd_t *pmdp); |
||
813 | |||
814 | #define __HAVE_ARCH_PMDP_CLEAR_YOUNG_FLUSH |
||
815 | extern int pmdp_clear_flush_young(struct vm_area_struct *vma, |
||
816 | unsigned long address, pmd_t *pmdp); |
||
817 | |||
818 | |||
819 | #define __HAVE_ARCH_PMDP_SPLITTING_FLUSH |
||
820 | extern void pmdp_splitting_flush(struct vm_area_struct *vma, |
||
821 | unsigned long addr, pmd_t *pmdp); |
||
822 | |||
823 | #define __HAVE_ARCH_PMD_WRITE |
||
824 | static inline int pmd_write(pmd_t pmd) |
||
825 | { |
||
826 | return pmd_flags(pmd) & _PAGE_RW; |
||
827 | } |
||
828 | |||
6082 | serge | 829 | #define __HAVE_ARCH_PMDP_HUGE_GET_AND_CLEAR |
830 | static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm, unsigned long addr, |
||
5270 | serge | 831 | pmd_t *pmdp) |
832 | { |
||
833 | pmd_t pmd = native_pmdp_get_and_clear(pmdp); |
||
834 | pmd_update(mm, addr, pmdp); |
||
835 | return pmd; |
||
836 | } |
||
837 | |||
838 | #define __HAVE_ARCH_PMDP_SET_WRPROTECT |
||
839 | static inline void pmdp_set_wrprotect(struct mm_struct *mm, |
||
840 | unsigned long addr, pmd_t *pmdp) |
||
841 | { |
||
842 | clear_bit(_PAGE_BIT_RW, (unsigned long *)pmdp); |
||
843 | pmd_update(mm, addr, pmdp); |
||
844 | } |
||
845 | |||
846 | /* |
||
847 | * clone_pgd_range(pgd_t *dst, pgd_t *src, int count); |
||
848 | * |
||
849 | * dst - pointer to pgd range anwhere on a pgd page |
||
850 | * src - "" |
||
851 | * count - the number of pgds to copy. |
||
852 | * |
||
853 | * dst and src can be on the same page, but the range must not overlap, |
||
854 | * and must not cross a page boundary. |
||
855 | */ |
||
856 | static inline void clone_pgd_range(pgd_t *dst, pgd_t *src, int count) |
||
857 | { |
||
858 | memcpy(dst, src, count * sizeof(pgd_t)); |
||
859 | } |
||
860 | |||
861 | #define PTE_SHIFT ilog2(PTRS_PER_PTE) |
||
862 | static inline int page_level_shift(enum pg_level level) |
||
863 | { |
||
864 | return (PAGE_SHIFT - PTE_SHIFT) + level * PTE_SHIFT; |
||
865 | } |
||
866 | static inline unsigned long page_level_size(enum pg_level level) |
||
867 | { |
||
868 | return 1UL << page_level_shift(level); |
||
869 | } |
||
870 | static inline unsigned long page_level_mask(enum pg_level level) |
||
871 | { |
||
872 | return ~(page_level_size(level) - 1); |
||
873 | } |
||
874 | |||
875 | /* |
||
876 | * The x86 doesn't have any external MMU info: the kernel page |
||
877 | * tables contain all the necessary information. |
||
878 | */ |
||
879 | static inline void update_mmu_cache(struct vm_area_struct *vma, |
||
880 | unsigned long addr, pte_t *ptep) |
||
881 | { |
||
882 | } |
||
883 | static inline void update_mmu_cache_pmd(struct vm_area_struct *vma, |
||
884 | unsigned long addr, pmd_t *pmd) |
||
885 | { |
||
886 | } |
||
887 | |||
888 | #ifdef CONFIG_HAVE_ARCH_SOFT_DIRTY |
||
889 | static inline pte_t pte_swp_mksoft_dirty(pte_t pte) |
||
890 | { |
||
891 | return pte_set_flags(pte, _PAGE_SWP_SOFT_DIRTY); |
||
892 | } |
||
893 | |||
894 | static inline int pte_swp_soft_dirty(pte_t pte) |
||
895 | { |
||
896 | return pte_flags(pte) & _PAGE_SWP_SOFT_DIRTY; |
||
897 | } |
||
898 | |||
899 | static inline pte_t pte_swp_clear_soft_dirty(pte_t pte) |
||
900 | { |
||
901 | return pte_clear_flags(pte, _PAGE_SWP_SOFT_DIRTY); |
||
902 | } |
||
903 | #endif |
||
904 | |||
905 | //#include |
||
906 | #endif /* __ASSEMBLY__ */ |
||
907 | |||
908 | #endif /* _ASM_X86_PGTABLE_H */><>><>><> |