H. Peter Anvin | 1965aae | 2008-10-22 22:26:29 -0700 | [diff] [blame] | 1 | #ifndef _ASM_X86_PGTABLE_H |
| 2 | #define _ASM_X86_PGTABLE_H |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 3 | |
Ingo Molnar | c47c1b1 | 2009-02-09 11:57:45 +0100 | [diff] [blame] | 4 | #include <asm/page.h> |
Suresh Siddha | 1adcaaf | 2009-08-17 13:23:50 -0700 | [diff] [blame] | 5 | #include <asm/e820.h> |
Ingo Molnar | c47c1b1 | 2009-02-09 11:57:45 +0100 | [diff] [blame] | 6 | |
Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 7 | #include <asm/pgtable_types.h> |
Suresh Siddha | b2bc273 | 2008-09-23 14:00:36 -0700 | [diff] [blame] | 8 | |
venkatesh.pallipadi@intel.com | 8a7b12f | 2008-12-18 11:41:31 -0800 | [diff] [blame] | 9 | /* |
| 10 | * Macro to mark a page protection value as UC- |
| 11 | */ |
Juergen Gross | d85f333 | 2014-11-03 14:01:53 +0100 | [diff] [blame] | 12 | #define pgprot_noncached(prot) \ |
| 13 | ((boot_cpu_data.x86 > 3) \ |
| 14 | ? (__pgprot(pgprot_val(prot) | \ |
| 15 | cachemode2protval(_PAGE_CACHE_MODE_UC_MINUS))) \ |
venkatesh.pallipadi@intel.com | 8a7b12f | 2008-12-18 11:41:31 -0800 | [diff] [blame] | 16 | : (prot)) |
| 17 | |
Jeremy Fitzhardinge | 4614139 | 2008-01-30 13:32:56 +0100 | [diff] [blame] | 18 | #ifndef __ASSEMBLY__ |
H. Peter Anvin | 55a6ca2 | 2009-11-23 15:12:07 -0800 | [diff] [blame] | 19 | #include <asm/x86_init.h> |
| 20 | |
Borislav Petkov | ef6bea6 | 2014-01-18 12:48:14 +0100 | [diff] [blame] | 21 | void ptdump_walk_pgd_level(struct seq_file *m, pgd_t *pgd); |
| 22 | |
Jeremy Fitzhardinge | 4614139 | 2008-01-30 13:32:56 +0100 | [diff] [blame] | 23 | /* |
Jeremy Fitzhardinge | 8405b12 | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 24 | * ZERO_PAGE is a global shared page that is always zero: used |
| 25 | * for zero-mapped memory areas etc.. |
| 26 | */ |
Andi Kleen | 277d5b4 | 2013-08-05 15:02:43 -0700 | [diff] [blame] | 27 | extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)] |
| 28 | __visible; |
Jeremy Fitzhardinge | 8405b12 | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 29 | #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) |
| 30 | |
Jeremy Fitzhardinge | e3ed910 | 2008-01-30 13:34:11 +0100 | [diff] [blame] | 31 | extern spinlock_t pgd_lock; |
| 32 | extern struct list_head pgd_list; |
Jeremy Fitzhardinge | 8405b12 | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 33 | |
Jeremy Fitzhardinge | 617d34d | 2010-09-21 12:01:51 -0700 | [diff] [blame] | 34 | extern struct mm_struct *pgd_page_get_mm(struct page *page); |
| 35 | |
Jeremy Fitzhardinge | 54321d9 | 2009-02-11 10:20:05 -0800 | [diff] [blame] | 36 | #ifdef CONFIG_PARAVIRT |
| 37 | #include <asm/paravirt.h> |
| 38 | #else /* !CONFIG_PARAVIRT */ |
| 39 | #define set_pte(ptep, pte) native_set_pte(ptep, pte) |
| 40 | #define set_pte_at(mm, addr, ptep, pte) native_set_pte_at(mm, addr, ptep, pte) |
Andrea Arcangeli | 2609ae6 | 2011-01-13 15:46:37 -0800 | [diff] [blame] | 41 | #define set_pmd_at(mm, addr, pmdp, pmd) native_set_pmd_at(mm, addr, pmdp, pmd) |
Jeremy Fitzhardinge | 54321d9 | 2009-02-11 10:20:05 -0800 | [diff] [blame] | 42 | |
Jeremy Fitzhardinge | 54321d9 | 2009-02-11 10:20:05 -0800 | [diff] [blame] | 43 | #define set_pte_atomic(ptep, pte) \ |
| 44 | native_set_pte_atomic(ptep, pte) |
| 45 | |
| 46 | #define set_pmd(pmdp, pmd) native_set_pmd(pmdp, pmd) |
| 47 | |
| 48 | #ifndef __PAGETABLE_PUD_FOLDED |
| 49 | #define set_pgd(pgdp, pgd) native_set_pgd(pgdp, pgd) |
| 50 | #define pgd_clear(pgd) native_pgd_clear(pgd) |
| 51 | #endif |
| 52 | |
| 53 | #ifndef set_pud |
| 54 | # define set_pud(pudp, pud) native_set_pud(pudp, pud) |
| 55 | #endif |
| 56 | |
| 57 | #ifndef __PAGETABLE_PMD_FOLDED |
| 58 | #define pud_clear(pud) native_pud_clear(pud) |
| 59 | #endif |
| 60 | |
| 61 | #define pte_clear(mm, addr, ptep) native_pte_clear(mm, addr, ptep) |
| 62 | #define pmd_clear(pmd) native_pmd_clear(pmd) |
| 63 | |
| 64 | #define pte_update(mm, addr, ptep) do { } while (0) |
| 65 | #define pte_update_defer(mm, addr, ptep) do { } while (0) |
Andrea Arcangeli | 2609ae6 | 2011-01-13 15:46:37 -0800 | [diff] [blame] | 66 | #define pmd_update(mm, addr, ptep) do { } while (0) |
| 67 | #define pmd_update_defer(mm, addr, ptep) do { } while (0) |
Jeremy Fitzhardinge | 54321d9 | 2009-02-11 10:20:05 -0800 | [diff] [blame] | 68 | |
Jeremy Fitzhardinge | 54321d9 | 2009-02-11 10:20:05 -0800 | [diff] [blame] | 69 | #define pgd_val(x) native_pgd_val(x) |
| 70 | #define __pgd(x) native_make_pgd(x) |
| 71 | |
| 72 | #ifndef __PAGETABLE_PUD_FOLDED |
| 73 | #define pud_val(x) native_pud_val(x) |
| 74 | #define __pud(x) native_make_pud(x) |
| 75 | #endif |
| 76 | |
| 77 | #ifndef __PAGETABLE_PMD_FOLDED |
| 78 | #define pmd_val(x) native_pmd_val(x) |
| 79 | #define __pmd(x) native_make_pmd(x) |
| 80 | #endif |
| 81 | |
| 82 | #define pte_val(x) native_pte_val(x) |
| 83 | #define __pte(x) native_make_pte(x) |
| 84 | |
Jeremy Fitzhardinge | 224101e | 2009-02-18 11:18:57 -0800 | [diff] [blame] | 85 | #define arch_end_context_switch(prev) do {} while(0) |
| 86 | |
Jeremy Fitzhardinge | 54321d9 | 2009-02-11 10:20:05 -0800 | [diff] [blame] | 87 | #endif /* CONFIG_PARAVIRT */ |
| 88 | |
Jeremy Fitzhardinge | 8405b12 | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 89 | /* |
Jeremy Fitzhardinge | 4614139 | 2008-01-30 13:32:56 +0100 | [diff] [blame] | 90 | * The following only work if pte_present() is true. |
| 91 | * Undefined behaviour if not.. |
| 92 | */ |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 93 | static inline int pte_dirty(pte_t pte) |
| 94 | { |
Jeremy Fitzhardinge | a15af1c | 2008-05-26 23:31:06 +0100 | [diff] [blame] | 95 | return pte_flags(pte) & _PAGE_DIRTY; |
Jeremy Fitzhardinge | 4614139 | 2008-01-30 13:32:56 +0100 | [diff] [blame] | 96 | } |
| 97 | |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 98 | static inline int pte_young(pte_t pte) |
| 99 | { |
Jeremy Fitzhardinge | a15af1c | 2008-05-26 23:31:06 +0100 | [diff] [blame] | 100 | return pte_flags(pte) & _PAGE_ACCESSED; |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 101 | } |
| 102 | |
Kirill A. Shutemov | c164e03 | 2014-12-10 15:44:36 -0800 | [diff] [blame] | 103 | static inline int pmd_dirty(pmd_t pmd) |
| 104 | { |
| 105 | return pmd_flags(pmd) & _PAGE_DIRTY; |
| 106 | } |
| 107 | |
Johannes Weiner | f2d6bfe | 2011-01-13 15:47:01 -0800 | [diff] [blame] | 108 | static inline int pmd_young(pmd_t pmd) |
| 109 | { |
| 110 | return pmd_flags(pmd) & _PAGE_ACCESSED; |
| 111 | } |
| 112 | |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 113 | static inline int pte_write(pte_t pte) |
| 114 | { |
Jeremy Fitzhardinge | a15af1c | 2008-05-26 23:31:06 +0100 | [diff] [blame] | 115 | return pte_flags(pte) & _PAGE_RW; |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 116 | } |
| 117 | |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 118 | static inline int pte_huge(pte_t pte) |
| 119 | { |
Jeremy Fitzhardinge | a15af1c | 2008-05-26 23:31:06 +0100 | [diff] [blame] | 120 | return pte_flags(pte) & _PAGE_PSE; |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 121 | } |
| 122 | |
| 123 | static inline int pte_global(pte_t pte) |
| 124 | { |
Jeremy Fitzhardinge | a15af1c | 2008-05-26 23:31:06 +0100 | [diff] [blame] | 125 | return pte_flags(pte) & _PAGE_GLOBAL; |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 126 | } |
| 127 | |
| 128 | static inline int pte_exec(pte_t pte) |
| 129 | { |
Jeremy Fitzhardinge | a15af1c | 2008-05-26 23:31:06 +0100 | [diff] [blame] | 130 | return !(pte_flags(pte) & _PAGE_NX); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 131 | } |
| 132 | |
Nick Piggin | 7e67513 | 2008-04-28 02:13:00 -0700 | [diff] [blame] | 133 | static inline int pte_special(pte_t pte) |
| 134 | { |
Mel Gorman | c819f37 | 2015-02-12 14:58:38 -0800 | [diff] [blame] | 135 | return pte_flags(pte) & _PAGE_SPECIAL; |
Nick Piggin | 7e67513 | 2008-04-28 02:13:00 -0700 | [diff] [blame] | 136 | } |
| 137 | |
Hugh Dickins | 91030ca | 2008-09-09 16:42:45 +0100 | [diff] [blame] | 138 | static inline unsigned long pte_pfn(pte_t pte) |
| 139 | { |
| 140 | return (pte_val(pte) & PTE_PFN_MASK) >> PAGE_SHIFT; |
| 141 | } |
| 142 | |
Akinobu Mita | 087975b | 2009-06-27 15:35:15 +0900 | [diff] [blame] | 143 | static inline unsigned long pmd_pfn(pmd_t pmd) |
| 144 | { |
| 145 | return (pmd_val(pmd) & PTE_PFN_MASK) >> PAGE_SHIFT; |
| 146 | } |
| 147 | |
Mel Gorman | 0ee364e | 2013-02-11 14:52:36 +0000 | [diff] [blame] | 148 | static inline unsigned long pud_pfn(pud_t pud) |
| 149 | { |
| 150 | return (pud_val(pud) & PTE_PFN_MASK) >> PAGE_SHIFT; |
| 151 | } |
| 152 | |
Hugh Dickins | 91030ca | 2008-09-09 16:42:45 +0100 | [diff] [blame] | 153 | #define pte_page(pte) pfn_to_page(pte_pfn(pte)) |
| 154 | |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 155 | static inline int pmd_large(pmd_t pte) |
| 156 | { |
Andrea Arcangeli | 027ef6c | 2012-10-08 16:33:27 -0700 | [diff] [blame] | 157 | return pmd_flags(pte) & _PAGE_PSE; |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 158 | } |
| 159 | |
Johannes Weiner | f2d6bfe | 2011-01-13 15:47:01 -0800 | [diff] [blame] | 160 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
| 161 | static inline int pmd_trans_splitting(pmd_t pmd) |
| 162 | { |
| 163 | return pmd_val(pmd) & _PAGE_SPLITTING; |
| 164 | } |
| 165 | |
| 166 | static inline int pmd_trans_huge(pmd_t pmd) |
| 167 | { |
| 168 | return pmd_val(pmd) & _PAGE_PSE; |
| 169 | } |
Andrea Arcangeli | 4b7167b | 2011-01-13 15:47:09 -0800 | [diff] [blame] | 170 | |
| 171 | static inline int has_transparent_hugepage(void) |
| 172 | { |
| 173 | return cpu_has_pse; |
| 174 | } |
Johannes Weiner | f2d6bfe | 2011-01-13 15:47:01 -0800 | [diff] [blame] | 175 | #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ |
| 176 | |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 177 | static inline pte_t pte_set_flags(pte_t pte, pteval_t set) |
| 178 | { |
| 179 | pteval_t v = native_pte_val(pte); |
| 180 | |
| 181 | return native_make_pte(v | set); |
| 182 | } |
| 183 | |
| 184 | static inline pte_t pte_clear_flags(pte_t pte, pteval_t clear) |
| 185 | { |
| 186 | pteval_t v = native_pte_val(pte); |
| 187 | |
| 188 | return native_make_pte(v & ~clear); |
| 189 | } |
| 190 | |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 191 | static inline pte_t pte_mkclean(pte_t pte) |
| 192 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 193 | return pte_clear_flags(pte, _PAGE_DIRTY); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 194 | } |
| 195 | |
| 196 | static inline pte_t pte_mkold(pte_t pte) |
| 197 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 198 | return pte_clear_flags(pte, _PAGE_ACCESSED); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 199 | } |
| 200 | |
| 201 | static inline pte_t pte_wrprotect(pte_t pte) |
| 202 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 203 | return pte_clear_flags(pte, _PAGE_RW); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 204 | } |
| 205 | |
| 206 | static inline pte_t pte_mkexec(pte_t pte) |
| 207 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 208 | return pte_clear_flags(pte, _PAGE_NX); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 209 | } |
| 210 | |
| 211 | static inline pte_t pte_mkdirty(pte_t pte) |
| 212 | { |
Pavel Emelyanov | 0f8975e | 2013-07-03 15:01:20 -0700 | [diff] [blame] | 213 | return pte_set_flags(pte, _PAGE_DIRTY | _PAGE_SOFT_DIRTY); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 214 | } |
| 215 | |
| 216 | static inline pte_t pte_mkyoung(pte_t pte) |
| 217 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 218 | return pte_set_flags(pte, _PAGE_ACCESSED); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 219 | } |
| 220 | |
| 221 | static inline pte_t pte_mkwrite(pte_t pte) |
| 222 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 223 | return pte_set_flags(pte, _PAGE_RW); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 224 | } |
| 225 | |
| 226 | static inline pte_t pte_mkhuge(pte_t pte) |
| 227 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 228 | return pte_set_flags(pte, _PAGE_PSE); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 229 | } |
| 230 | |
| 231 | static inline pte_t pte_clrhuge(pte_t pte) |
| 232 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 233 | return pte_clear_flags(pte, _PAGE_PSE); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 234 | } |
| 235 | |
| 236 | static inline pte_t pte_mkglobal(pte_t pte) |
| 237 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 238 | return pte_set_flags(pte, _PAGE_GLOBAL); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 239 | } |
| 240 | |
| 241 | static inline pte_t pte_clrglobal(pte_t pte) |
| 242 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 243 | return pte_clear_flags(pte, _PAGE_GLOBAL); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 244 | } |
Jeremy Fitzhardinge | 4614139 | 2008-01-30 13:32:56 +0100 | [diff] [blame] | 245 | |
Nick Piggin | 7e67513 | 2008-04-28 02:13:00 -0700 | [diff] [blame] | 246 | static inline pte_t pte_mkspecial(pte_t pte) |
| 247 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 248 | return pte_set_flags(pte, _PAGE_SPECIAL); |
Nick Piggin | 7e67513 | 2008-04-28 02:13:00 -0700 | [diff] [blame] | 249 | } |
| 250 | |
Johannes Weiner | f2d6bfe | 2011-01-13 15:47:01 -0800 | [diff] [blame] | 251 | static inline pmd_t pmd_set_flags(pmd_t pmd, pmdval_t set) |
| 252 | { |
| 253 | pmdval_t v = native_pmd_val(pmd); |
| 254 | |
| 255 | return __pmd(v | set); |
| 256 | } |
| 257 | |
| 258 | static inline pmd_t pmd_clear_flags(pmd_t pmd, pmdval_t clear) |
| 259 | { |
| 260 | pmdval_t v = native_pmd_val(pmd); |
| 261 | |
| 262 | return __pmd(v & ~clear); |
| 263 | } |
| 264 | |
| 265 | static inline pmd_t pmd_mkold(pmd_t pmd) |
| 266 | { |
| 267 | return pmd_clear_flags(pmd, _PAGE_ACCESSED); |
| 268 | } |
| 269 | |
| 270 | static inline pmd_t pmd_wrprotect(pmd_t pmd) |
| 271 | { |
| 272 | return pmd_clear_flags(pmd, _PAGE_RW); |
| 273 | } |
| 274 | |
| 275 | static inline pmd_t pmd_mkdirty(pmd_t pmd) |
| 276 | { |
Pavel Emelyanov | 0f8975e | 2013-07-03 15:01:20 -0700 | [diff] [blame] | 277 | return pmd_set_flags(pmd, _PAGE_DIRTY | _PAGE_SOFT_DIRTY); |
Johannes Weiner | f2d6bfe | 2011-01-13 15:47:01 -0800 | [diff] [blame] | 278 | } |
| 279 | |
| 280 | static inline pmd_t pmd_mkhuge(pmd_t pmd) |
| 281 | { |
| 282 | return pmd_set_flags(pmd, _PAGE_PSE); |
| 283 | } |
| 284 | |
| 285 | static inline pmd_t pmd_mkyoung(pmd_t pmd) |
| 286 | { |
| 287 | return pmd_set_flags(pmd, _PAGE_ACCESSED); |
| 288 | } |
| 289 | |
| 290 | static inline pmd_t pmd_mkwrite(pmd_t pmd) |
| 291 | { |
| 292 | return pmd_set_flags(pmd, _PAGE_RW); |
| 293 | } |
| 294 | |
| 295 | static inline pmd_t pmd_mknotpresent(pmd_t pmd) |
| 296 | { |
Mel Gorman | 21d9ee3 | 2015-02-12 14:58:32 -0800 | [diff] [blame] | 297 | return pmd_clear_flags(pmd, _PAGE_PRESENT | _PAGE_PROTNONE); |
Johannes Weiner | f2d6bfe | 2011-01-13 15:47:01 -0800 | [diff] [blame] | 298 | } |
| 299 | |
Cyrill Gorcunov | 2bf01f9 | 2014-06-04 16:08:16 -0700 | [diff] [blame] | 300 | #ifdef CONFIG_HAVE_ARCH_SOFT_DIRTY |
Pavel Emelyanov | 0f8975e | 2013-07-03 15:01:20 -0700 | [diff] [blame] | 301 | static inline int pte_soft_dirty(pte_t pte) |
| 302 | { |
| 303 | return pte_flags(pte) & _PAGE_SOFT_DIRTY; |
| 304 | } |
| 305 | |
| 306 | static inline int pmd_soft_dirty(pmd_t pmd) |
| 307 | { |
| 308 | return pmd_flags(pmd) & _PAGE_SOFT_DIRTY; |
| 309 | } |
| 310 | |
| 311 | static inline pte_t pte_mksoft_dirty(pte_t pte) |
| 312 | { |
| 313 | return pte_set_flags(pte, _PAGE_SOFT_DIRTY); |
| 314 | } |
| 315 | |
| 316 | static inline pmd_t pmd_mksoft_dirty(pmd_t pmd) |
| 317 | { |
| 318 | return pmd_set_flags(pmd, _PAGE_SOFT_DIRTY); |
| 319 | } |
| 320 | |
Cyrill Gorcunov | 2bf01f9 | 2014-06-04 16:08:16 -0700 | [diff] [blame] | 321 | #endif /* CONFIG_HAVE_ARCH_SOFT_DIRTY */ |
| 322 | |
Jeremy Fitzhardinge | b534816 | 2009-02-04 18:33:38 -0800 | [diff] [blame] | 323 | /* |
| 324 | * Mask out unsupported bits in a present pgprot. Non-present pgprots |
| 325 | * can use those bits for other purposes, so leave them be. |
| 326 | */ |
| 327 | static inline pgprotval_t massage_pgprot(pgprot_t pgprot) |
| 328 | { |
| 329 | pgprotval_t protval = pgprot_val(pgprot); |
| 330 | |
| 331 | if (protval & _PAGE_PRESENT) |
| 332 | protval &= __supported_pte_mask; |
| 333 | |
| 334 | return protval; |
| 335 | } |
| 336 | |
Jeremy Fitzhardinge | 6fdc05d | 2008-01-30 13:32:57 +0100 | [diff] [blame] | 337 | static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot) |
| 338 | { |
Jeremy Fitzhardinge | b534816 | 2009-02-04 18:33:38 -0800 | [diff] [blame] | 339 | return __pte(((phys_addr_t)page_nr << PAGE_SHIFT) | |
| 340 | massage_pgprot(pgprot)); |
Jeremy Fitzhardinge | 6fdc05d | 2008-01-30 13:32:57 +0100 | [diff] [blame] | 341 | } |
| 342 | |
| 343 | static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot) |
| 344 | { |
Jeremy Fitzhardinge | b534816 | 2009-02-04 18:33:38 -0800 | [diff] [blame] | 345 | return __pmd(((phys_addr_t)page_nr << PAGE_SHIFT) | |
| 346 | massage_pgprot(pgprot)); |
Jeremy Fitzhardinge | 6fdc05d | 2008-01-30 13:32:57 +0100 | [diff] [blame] | 347 | } |
| 348 | |
Ingo Molnar | 3847231 | 2008-01-30 13:32:57 +0100 | [diff] [blame] | 349 | static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) |
| 350 | { |
| 351 | pteval_t val = pte_val(pte); |
| 352 | |
| 353 | /* |
| 354 | * Chop off the NX bit (if present), and add the NX portion of |
| 355 | * the newprot (if present): |
| 356 | */ |
Venki Pallipadi | 1c12c4c | 2008-05-14 16:05:51 -0700 | [diff] [blame] | 357 | val &= _PAGE_CHG_MASK; |
Jeremy Fitzhardinge | b534816 | 2009-02-04 18:33:38 -0800 | [diff] [blame] | 358 | val |= massage_pgprot(newprot) & ~_PAGE_CHG_MASK; |
Ingo Molnar | 3847231 | 2008-01-30 13:32:57 +0100 | [diff] [blame] | 359 | |
| 360 | return __pte(val); |
| 361 | } |
| 362 | |
Johannes Weiner | c489f12 | 2011-01-13 15:47:02 -0800 | [diff] [blame] | 363 | static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot) |
| 364 | { |
| 365 | pmdval_t val = pmd_val(pmd); |
| 366 | |
| 367 | val &= _HPAGE_CHG_MASK; |
| 368 | val |= massage_pgprot(newprot) & ~_HPAGE_CHG_MASK; |
| 369 | |
| 370 | return __pmd(val); |
| 371 | } |
| 372 | |
Venki Pallipadi | 1c12c4c | 2008-05-14 16:05:51 -0700 | [diff] [blame] | 373 | /* mprotect needs to preserve PAT bits when updating vm_page_prot */ |
| 374 | #define pgprot_modify pgprot_modify |
| 375 | static inline pgprot_t pgprot_modify(pgprot_t oldprot, pgprot_t newprot) |
| 376 | { |
| 377 | pgprotval_t preservebits = pgprot_val(oldprot) & _PAGE_CHG_MASK; |
| 378 | pgprotval_t addbits = pgprot_val(newprot); |
| 379 | return __pgprot(preservebits | addbits); |
| 380 | } |
| 381 | |
Jeremy Fitzhardinge | 77be1fa | 2008-07-21 22:59:56 -0700 | [diff] [blame] | 382 | #define pte_pgprot(x) __pgprot(pte_flags(x) & PTE_FLAGS_MASK) |
Andi Kleen | c6ca18e | 2008-01-30 13:33:51 +0100 | [diff] [blame] | 383 | |
Jeremy Fitzhardinge | b534816 | 2009-02-04 18:33:38 -0800 | [diff] [blame] | 384 | #define canon_pgprot(p) __pgprot(massage_pgprot(p)) |
Andi Kleen | 1e8e23b | 2008-01-30 13:33:53 +0100 | [diff] [blame] | 385 | |
Suresh Siddha | 1adcaaf | 2009-08-17 13:23:50 -0700 | [diff] [blame] | 386 | static inline int is_new_memtype_allowed(u64 paddr, unsigned long size, |
Juergen Gross | d85f333 | 2014-11-03 14:01:53 +0100 | [diff] [blame] | 387 | enum page_cache_mode pcm, |
| 388 | enum page_cache_mode new_pcm) |
venkatesh.pallipadi@intel.com | afc7d20 | 2009-01-09 16:13:10 -0800 | [diff] [blame] | 389 | { |
| 390 | /* |
H. Peter Anvin | 55a6ca2 | 2009-11-23 15:12:07 -0800 | [diff] [blame] | 391 | * PAT type is always WB for untracked ranges, so no need to check. |
Suresh Siddha | 1adcaaf | 2009-08-17 13:23:50 -0700 | [diff] [blame] | 392 | */ |
H. Peter Anvin | 8a27138 | 2009-11-23 14:49:20 -0800 | [diff] [blame] | 393 | if (x86_platform.is_untracked_pat_range(paddr, paddr + size)) |
Suresh Siddha | 1adcaaf | 2009-08-17 13:23:50 -0700 | [diff] [blame] | 394 | return 1; |
| 395 | |
| 396 | /* |
venkatesh.pallipadi@intel.com | afc7d20 | 2009-01-09 16:13:10 -0800 | [diff] [blame] | 397 | * Certain new memtypes are not allowed with certain |
| 398 | * requested memtype: |
| 399 | * - request is uncached, return cannot be write-back |
| 400 | * - request is write-combine, return cannot be write-back |
Toshi Kani | ecb2feb | 2015-06-04 18:55:14 +0200 | [diff] [blame] | 401 | * - request is write-through, return cannot be write-back |
| 402 | * - request is write-through, return cannot be write-combine |
venkatesh.pallipadi@intel.com | afc7d20 | 2009-01-09 16:13:10 -0800 | [diff] [blame] | 403 | */ |
Juergen Gross | d85f333 | 2014-11-03 14:01:53 +0100 | [diff] [blame] | 404 | if ((pcm == _PAGE_CACHE_MODE_UC_MINUS && |
| 405 | new_pcm == _PAGE_CACHE_MODE_WB) || |
| 406 | (pcm == _PAGE_CACHE_MODE_WC && |
Toshi Kani | ecb2feb | 2015-06-04 18:55:14 +0200 | [diff] [blame] | 407 | new_pcm == _PAGE_CACHE_MODE_WB) || |
| 408 | (pcm == _PAGE_CACHE_MODE_WT && |
| 409 | new_pcm == _PAGE_CACHE_MODE_WB) || |
| 410 | (pcm == _PAGE_CACHE_MODE_WT && |
| 411 | new_pcm == _PAGE_CACHE_MODE_WC)) { |
venkatesh.pallipadi@intel.com | afc7d20 | 2009-01-09 16:13:10 -0800 | [diff] [blame] | 412 | return 0; |
| 413 | } |
| 414 | |
| 415 | return 1; |
| 416 | } |
| 417 | |
Tejun Heo | 458a3e6 | 2009-02-24 11:57:21 +0900 | [diff] [blame] | 418 | pmd_t *populate_extra_pmd(unsigned long vaddr); |
| 419 | pte_t *populate_extra_pte(unsigned long vaddr); |
Jeremy Fitzhardinge | 4614139 | 2008-01-30 13:32:56 +0100 | [diff] [blame] | 420 | #endif /* __ASSEMBLY__ */ |
| 421 | |
Thomas Gleixner | 96a388d | 2007-10-11 11:20:03 +0200 | [diff] [blame] | 422 | #ifdef CONFIG_X86_32 |
David Howells | a1ce392 | 2012-10-02 18:01:25 +0100 | [diff] [blame] | 423 | # include <asm/pgtable_32.h> |
Thomas Gleixner | 96a388d | 2007-10-11 11:20:03 +0200 | [diff] [blame] | 424 | #else |
David Howells | a1ce392 | 2012-10-02 18:01:25 +0100 | [diff] [blame] | 425 | # include <asm/pgtable_64.h> |
Thomas Gleixner | 96a388d | 2007-10-11 11:20:03 +0200 | [diff] [blame] | 426 | #endif |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 427 | |
Jeremy Fitzhardinge | aca159d | 2009-02-05 11:30:54 -0800 | [diff] [blame] | 428 | #ifndef __ASSEMBLY__ |
Jeremy Fitzhardinge | f476961 | 2009-02-05 11:30:55 -0800 | [diff] [blame] | 429 | #include <linux/mm_types.h> |
Cyrill Gorcunov | fa0f281 | 2013-09-11 14:22:47 -0700 | [diff] [blame] | 430 | #include <linux/mmdebug.h> |
Dave Hansen | 4cbeb51 | 2013-01-22 13:24:31 -0800 | [diff] [blame] | 431 | #include <linux/log2.h> |
Jeremy Fitzhardinge | aca159d | 2009-02-05 11:30:54 -0800 | [diff] [blame] | 432 | |
Jeremy Fitzhardinge | a034a01 | 2009-02-05 11:30:43 -0800 | [diff] [blame] | 433 | static inline int pte_none(pte_t pte) |
| 434 | { |
| 435 | return !pte.pte; |
| 436 | } |
| 437 | |
Jeremy Fitzhardinge | 8de01da | 2009-02-05 11:30:44 -0800 | [diff] [blame] | 438 | #define __HAVE_ARCH_PTE_SAME |
| 439 | static inline int pte_same(pte_t a, pte_t b) |
| 440 | { |
| 441 | return a.pte == b.pte; |
| 442 | } |
| 443 | |
Jeremy Fitzhardinge | 7c68385 | 2009-02-05 11:30:45 -0800 | [diff] [blame] | 444 | static inline int pte_present(pte_t a) |
| 445 | { |
Mel Gorman | c46a7c8 | 2014-06-04 16:06:30 -0700 | [diff] [blame] | 446 | return pte_flags(a) & (_PAGE_PRESENT | _PAGE_PROTNONE); |
| 447 | } |
| 448 | |
Rik van Riel | 2c3cf55 | 2012-10-09 15:31:12 +0200 | [diff] [blame] | 449 | #define pte_accessible pte_accessible |
Rik van Riel | 2084140 | 2013-12-18 17:08:44 -0800 | [diff] [blame] | 450 | static inline bool pte_accessible(struct mm_struct *mm, pte_t a) |
Rik van Riel | 2c3cf55 | 2012-10-09 15:31:12 +0200 | [diff] [blame] | 451 | { |
Rik van Riel | 2084140 | 2013-12-18 17:08:44 -0800 | [diff] [blame] | 452 | if (pte_flags(a) & _PAGE_PRESENT) |
| 453 | return true; |
| 454 | |
Mel Gorman | 21d9ee3 | 2015-02-12 14:58:32 -0800 | [diff] [blame] | 455 | if ((pte_flags(a) & _PAGE_PROTNONE) && |
Rik van Riel | 2084140 | 2013-12-18 17:08:44 -0800 | [diff] [blame] | 456 | mm_tlb_flush_pending(mm)) |
| 457 | return true; |
| 458 | |
| 459 | return false; |
Rik van Riel | 2c3cf55 | 2012-10-09 15:31:12 +0200 | [diff] [blame] | 460 | } |
| 461 | |
Jeremy Fitzhardinge | eb63657 | 2009-02-06 13:05:56 -0800 | [diff] [blame] | 462 | static inline int pte_hidden(pte_t pte) |
Vegard Nossum | dfec072 | 2008-04-04 00:51:41 +0200 | [diff] [blame] | 463 | { |
Jeremy Fitzhardinge | eb63657 | 2009-02-06 13:05:56 -0800 | [diff] [blame] | 464 | return pte_flags(pte) & _PAGE_HIDDEN; |
Vegard Nossum | dfec072 | 2008-04-04 00:51:41 +0200 | [diff] [blame] | 465 | } |
| 466 | |
Jeremy Fitzhardinge | 649e8ef | 2009-02-05 11:30:50 -0800 | [diff] [blame] | 467 | static inline int pmd_present(pmd_t pmd) |
| 468 | { |
Andrea Arcangeli | 027ef6c | 2012-10-08 16:33:27 -0700 | [diff] [blame] | 469 | /* |
| 470 | * Checking for _PAGE_PSE is needed too because |
| 471 | * split_huge_page will temporarily clear the present bit (but |
| 472 | * the _PAGE_PSE flag will remain set at all times while the |
| 473 | * _PAGE_PRESENT bit is clear). |
| 474 | */ |
Mel Gorman | 21d9ee3 | 2015-02-12 14:58:32 -0800 | [diff] [blame] | 475 | return pmd_flags(pmd) & (_PAGE_PRESENT | _PAGE_PROTNONE | _PAGE_PSE); |
Jeremy Fitzhardinge | 649e8ef | 2009-02-05 11:30:50 -0800 | [diff] [blame] | 476 | } |
| 477 | |
Mel Gorman | e7bb4b6d | 2015-02-12 14:58:19 -0800 | [diff] [blame] | 478 | #ifdef CONFIG_NUMA_BALANCING |
| 479 | /* |
| 480 | * These work without NUMA balancing but the kernel does not care. See the |
| 481 | * comment in include/asm-generic/pgtable.h |
| 482 | */ |
| 483 | static inline int pte_protnone(pte_t pte) |
| 484 | { |
David Vrabel | e3a1f6c | 2015-02-19 13:06:53 +0000 | [diff] [blame] | 485 | return (pte_flags(pte) & (_PAGE_PROTNONE | _PAGE_PRESENT)) |
| 486 | == _PAGE_PROTNONE; |
Mel Gorman | e7bb4b6d | 2015-02-12 14:58:19 -0800 | [diff] [blame] | 487 | } |
| 488 | |
| 489 | static inline int pmd_protnone(pmd_t pmd) |
| 490 | { |
David Vrabel | e3a1f6c | 2015-02-19 13:06:53 +0000 | [diff] [blame] | 491 | return (pmd_flags(pmd) & (_PAGE_PROTNONE | _PAGE_PRESENT)) |
| 492 | == _PAGE_PROTNONE; |
Mel Gorman | e7bb4b6d | 2015-02-12 14:58:19 -0800 | [diff] [blame] | 493 | } |
| 494 | #endif /* CONFIG_NUMA_BALANCING */ |
| 495 | |
Jeremy Fitzhardinge | 4fea801 | 2009-02-05 11:30:51 -0800 | [diff] [blame] | 496 | static inline int pmd_none(pmd_t pmd) |
| 497 | { |
| 498 | /* Only check low word on 32-bit platforms, since it might be |
| 499 | out of sync with upper half. */ |
Jeremy Fitzhardinge | 26c8e317 | 2009-02-05 11:31:17 -0800 | [diff] [blame] | 500 | return (unsigned long)native_pmd_val(pmd) == 0; |
Jeremy Fitzhardinge | 4fea801 | 2009-02-05 11:30:51 -0800 | [diff] [blame] | 501 | } |
| 502 | |
Jeremy Fitzhardinge | 3ffb356 | 2009-02-05 11:30:59 -0800 | [diff] [blame] | 503 | static inline unsigned long pmd_page_vaddr(pmd_t pmd) |
| 504 | { |
| 505 | return (unsigned long)__va(pmd_val(pmd) & PTE_PFN_MASK); |
| 506 | } |
| 507 | |
Ingo Molnar | e5f7f202 | 2009-02-09 11:42:57 +0100 | [diff] [blame] | 508 | /* |
| 509 | * Currently stuck as a macro due to indirect forward reference to |
| 510 | * linux/mmzone.h's __section_mem_map_addr() definition: |
| 511 | */ |
Andrea Arcangeli | db3eb96f | 2011-01-13 15:46:41 -0800 | [diff] [blame] | 512 | #define pmd_page(pmd) pfn_to_page((pmd_val(pmd) & PTE_PFN_MASK) >> PAGE_SHIFT) |
Jeremy Fitzhardinge | 20063ca | 2009-02-05 11:31:00 -0800 | [diff] [blame] | 513 | |
Jeremy Fitzhardinge | e24d7ee | 2009-02-05 11:31:01 -0800 | [diff] [blame] | 514 | /* |
| 515 | * the pmd page can be thought of an array like this: pmd_t[PTRS_PER_PMD] |
| 516 | * |
| 517 | * this macro returns the index of the entry in the pmd page which would |
| 518 | * control the given virtual address |
| 519 | */ |
Figo.zhang | ce0c0f9 | 2009-06-28 18:07:39 +0800 | [diff] [blame] | 520 | static inline unsigned long pmd_index(unsigned long address) |
Jeremy Fitzhardinge | e24d7ee | 2009-02-05 11:31:01 -0800 | [diff] [blame] | 521 | { |
| 522 | return (address >> PMD_SHIFT) & (PTRS_PER_PMD - 1); |
| 523 | } |
| 524 | |
Jeremy Fitzhardinge | 97e2817 | 2009-02-05 11:31:05 -0800 | [diff] [blame] | 525 | /* |
| 526 | * Conversion functions: convert a page and protection to a page entry, |
| 527 | * and a page entry and page directory to the page they refer to. |
| 528 | * |
| 529 | * (Currently stuck as a macro because of indirect forward reference |
| 530 | * to linux/mm.h:page_to_nid()) |
| 531 | */ |
| 532 | #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) |
| 533 | |
Jeremy Fitzhardinge | 346309c | 2009-02-05 11:31:06 -0800 | [diff] [blame] | 534 | /* |
| 535 | * the pte page can be thought of an array like this: pte_t[PTRS_PER_PTE] |
| 536 | * |
| 537 | * this function returns the index of the entry in the pte page which would |
| 538 | * control the given virtual address |
| 539 | */ |
Figo.zhang | ce0c0f9 | 2009-06-28 18:07:39 +0800 | [diff] [blame] | 540 | static inline unsigned long pte_index(unsigned long address) |
Jeremy Fitzhardinge | 346309c | 2009-02-05 11:31:06 -0800 | [diff] [blame] | 541 | { |
| 542 | return (address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1); |
| 543 | } |
| 544 | |
Jeremy Fitzhardinge | 3fbc244 | 2009-02-05 11:31:07 -0800 | [diff] [blame] | 545 | static inline pte_t *pte_offset_kernel(pmd_t *pmd, unsigned long address) |
| 546 | { |
| 547 | return (pte_t *)pmd_page_vaddr(*pmd) + pte_index(address); |
| 548 | } |
| 549 | |
Jeremy Fitzhardinge | 9951023 | 2009-02-05 11:31:11 -0800 | [diff] [blame] | 550 | static inline int pmd_bad(pmd_t pmd) |
| 551 | { |
Jeremy Fitzhardinge | 18a7a199 | 2009-02-05 11:31:16 -0800 | [diff] [blame] | 552 | return (pmd_flags(pmd) & ~_PAGE_USER) != _KERNPG_TABLE; |
Jeremy Fitzhardinge | 9951023 | 2009-02-05 11:31:11 -0800 | [diff] [blame] | 553 | } |
| 554 | |
Jeremy Fitzhardinge | cc290ca | 2009-02-05 11:31:12 -0800 | [diff] [blame] | 555 | static inline unsigned long pages_to_mb(unsigned long npg) |
| 556 | { |
| 557 | return npg >> (20 - PAGE_SHIFT); |
| 558 | } |
| 559 | |
Kirill A. Shutemov | 9823336 | 2015-04-14 15:46:14 -0700 | [diff] [blame] | 560 | #if CONFIG_PGTABLE_LEVELS > 2 |
Jeremy Fitzhardinge | deb79cf | 2009-02-05 11:31:13 -0800 | [diff] [blame] | 561 | static inline int pud_none(pud_t pud) |
| 562 | { |
Jeremy Fitzhardinge | 26c8e317 | 2009-02-05 11:31:17 -0800 | [diff] [blame] | 563 | return native_pud_val(pud) == 0; |
Jeremy Fitzhardinge | deb79cf | 2009-02-05 11:31:13 -0800 | [diff] [blame] | 564 | } |
| 565 | |
Jeremy Fitzhardinge | 5ba7c91 | 2009-02-05 11:30:48 -0800 | [diff] [blame] | 566 | static inline int pud_present(pud_t pud) |
| 567 | { |
Jeremy Fitzhardinge | 18a7a199 | 2009-02-05 11:31:16 -0800 | [diff] [blame] | 568 | return pud_flags(pud) & _PAGE_PRESENT; |
Jeremy Fitzhardinge | 5ba7c91 | 2009-02-05 11:30:48 -0800 | [diff] [blame] | 569 | } |
Jeremy Fitzhardinge | 6fff47e | 2009-02-05 11:30:53 -0800 | [diff] [blame] | 570 | |
| 571 | static inline unsigned long pud_page_vaddr(pud_t pud) |
| 572 | { |
| 573 | return (unsigned long)__va((unsigned long)pud_val(pud) & PTE_PFN_MASK); |
| 574 | } |
Jeremy Fitzhardinge | f476961 | 2009-02-05 11:30:55 -0800 | [diff] [blame] | 575 | |
Ingo Molnar | e5f7f202 | 2009-02-09 11:42:57 +0100 | [diff] [blame] | 576 | /* |
| 577 | * Currently stuck as a macro due to indirect forward reference to |
| 578 | * linux/mmzone.h's __section_mem_map_addr() definition: |
| 579 | */ |
| 580 | #define pud_page(pud) pfn_to_page(pud_val(pud) >> PAGE_SHIFT) |
Jeremy Fitzhardinge | 01ade20 | 2009-02-05 11:31:02 -0800 | [diff] [blame] | 581 | |
| 582 | /* Find an entry in the second-level page table.. */ |
| 583 | static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address) |
| 584 | { |
| 585 | return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(address); |
| 586 | } |
Jeremy Fitzhardinge | 3180fba | 2009-02-05 11:31:04 -0800 | [diff] [blame] | 587 | |
Jeremy Fitzhardinge | 3f6cbef | 2009-02-05 11:31:08 -0800 | [diff] [blame] | 588 | static inline int pud_large(pud_t pud) |
| 589 | { |
Jeremy Fitzhardinge | e2f5bda | 2009-02-09 00:09:52 -0800 | [diff] [blame] | 590 | return (pud_val(pud) & (_PAGE_PSE | _PAGE_PRESENT)) == |
Jeremy Fitzhardinge | 3f6cbef | 2009-02-05 11:31:08 -0800 | [diff] [blame] | 591 | (_PAGE_PSE | _PAGE_PRESENT); |
| 592 | } |
Jeremy Fitzhardinge | a61bb29 | 2009-02-05 11:31:10 -0800 | [diff] [blame] | 593 | |
| 594 | static inline int pud_bad(pud_t pud) |
| 595 | { |
Jeremy Fitzhardinge | 18a7a199 | 2009-02-05 11:31:16 -0800 | [diff] [blame] | 596 | return (pud_flags(pud) & ~(_KERNPG_TABLE | _PAGE_USER)) != 0; |
Jeremy Fitzhardinge | a61bb29 | 2009-02-05 11:31:10 -0800 | [diff] [blame] | 597 | } |
Jeremy Fitzhardinge | e2f5bda | 2009-02-09 00:09:52 -0800 | [diff] [blame] | 598 | #else |
| 599 | static inline int pud_large(pud_t pud) |
| 600 | { |
| 601 | return 0; |
| 602 | } |
Kirill A. Shutemov | 9823336 | 2015-04-14 15:46:14 -0700 | [diff] [blame] | 603 | #endif /* CONFIG_PGTABLE_LEVELS > 2 */ |
Jeremy Fitzhardinge | 5ba7c91 | 2009-02-05 11:30:48 -0800 | [diff] [blame] | 604 | |
Kirill A. Shutemov | 9823336 | 2015-04-14 15:46:14 -0700 | [diff] [blame] | 605 | #if CONFIG_PGTABLE_LEVELS > 3 |
Jeremy Fitzhardinge | 9f38d7e | 2009-02-05 11:30:49 -0800 | [diff] [blame] | 606 | static inline int pgd_present(pgd_t pgd) |
| 607 | { |
Jeremy Fitzhardinge | 18a7a199 | 2009-02-05 11:31:16 -0800 | [diff] [blame] | 608 | return pgd_flags(pgd) & _PAGE_PRESENT; |
Jeremy Fitzhardinge | 9f38d7e | 2009-02-05 11:30:49 -0800 | [diff] [blame] | 609 | } |
Jeremy Fitzhardinge | c5f040b | 2009-02-05 11:30:52 -0800 | [diff] [blame] | 610 | |
| 611 | static inline unsigned long pgd_page_vaddr(pgd_t pgd) |
| 612 | { |
| 613 | return (unsigned long)__va((unsigned long)pgd_val(pgd) & PTE_PFN_MASK); |
| 614 | } |
Jeremy Fitzhardinge | 777cba1 | 2009-02-05 11:30:56 -0800 | [diff] [blame] | 615 | |
Ingo Molnar | e5f7f202 | 2009-02-09 11:42:57 +0100 | [diff] [blame] | 616 | /* |
| 617 | * Currently stuck as a macro due to indirect forward reference to |
| 618 | * linux/mmzone.h's __section_mem_map_addr() definition: |
| 619 | */ |
| 620 | #define pgd_page(pgd) pfn_to_page(pgd_val(pgd) >> PAGE_SHIFT) |
Jeremy Fitzhardinge | 7cfb810 | 2009-02-05 11:30:57 -0800 | [diff] [blame] | 621 | |
| 622 | /* to find an entry in a page-table-directory. */ |
Figo.zhang | ce0c0f9 | 2009-06-28 18:07:39 +0800 | [diff] [blame] | 623 | static inline unsigned long pud_index(unsigned long address) |
Jeremy Fitzhardinge | 7cfb810 | 2009-02-05 11:30:57 -0800 | [diff] [blame] | 624 | { |
| 625 | return (address >> PUD_SHIFT) & (PTRS_PER_PUD - 1); |
| 626 | } |
Jeremy Fitzhardinge | 3d081b1 | 2009-02-05 11:30:58 -0800 | [diff] [blame] | 627 | |
| 628 | static inline pud_t *pud_offset(pgd_t *pgd, unsigned long address) |
| 629 | { |
| 630 | return (pud_t *)pgd_page_vaddr(*pgd) + pud_index(address); |
| 631 | } |
Jeremy Fitzhardinge | 30f1031 | 2009-02-05 11:31:09 -0800 | [diff] [blame] | 632 | |
| 633 | static inline int pgd_bad(pgd_t pgd) |
| 634 | { |
Jeremy Fitzhardinge | 18a7a199 | 2009-02-05 11:31:16 -0800 | [diff] [blame] | 635 | return (pgd_flags(pgd) & ~_PAGE_USER) != _KERNPG_TABLE; |
Jeremy Fitzhardinge | 30f1031 | 2009-02-05 11:31:09 -0800 | [diff] [blame] | 636 | } |
Jeremy Fitzhardinge | 7325cc2 | 2009-02-05 11:31:14 -0800 | [diff] [blame] | 637 | |
| 638 | static inline int pgd_none(pgd_t pgd) |
| 639 | { |
Jeremy Fitzhardinge | 26c8e317 | 2009-02-05 11:31:17 -0800 | [diff] [blame] | 640 | return !native_pgd_val(pgd); |
Jeremy Fitzhardinge | 7325cc2 | 2009-02-05 11:31:14 -0800 | [diff] [blame] | 641 | } |
Kirill A. Shutemov | 9823336 | 2015-04-14 15:46:14 -0700 | [diff] [blame] | 642 | #endif /* CONFIG_PGTABLE_LEVELS > 3 */ |
Jeremy Fitzhardinge | 9f38d7e | 2009-02-05 11:30:49 -0800 | [diff] [blame] | 643 | |
Thomas Gleixner | 96a388d | 2007-10-11 11:20:03 +0200 | [diff] [blame] | 644 | #endif /* __ASSEMBLY__ */ |
| 645 | |
Jeremy Fitzhardinge | fb15a9b | 2008-06-25 00:19:06 -0400 | [diff] [blame] | 646 | /* |
| 647 | * the pgd page can be thought of an array like this: pgd_t[PTRS_PER_PGD] |
| 648 | * |
| 649 | * this macro returns the index of the entry in the pgd page which would |
| 650 | * control the given virtual address |
| 651 | */ |
| 652 | #define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1)) |
| 653 | |
| 654 | /* |
| 655 | * pgd_offset() returns a (pgd_t *) |
| 656 | * pgd_index() is used get the offset into the pgd page's array of pgd_t's; |
| 657 | */ |
| 658 | #define pgd_offset(mm, address) ((mm)->pgd + pgd_index((address))) |
| 659 | /* |
| 660 | * a shortcut which implies the use of the kernel's pgd, instead |
| 661 | * of a process's |
| 662 | */ |
| 663 | #define pgd_offset_k(address) pgd_offset(&init_mm, (address)) |
| 664 | |
| 665 | |
Jeremy Fitzhardinge | 68db065 | 2008-03-17 16:37:13 -0700 | [diff] [blame] | 666 | #define KERNEL_PGD_BOUNDARY pgd_index(PAGE_OFFSET) |
| 667 | #define KERNEL_PGD_PTRS (PTRS_PER_PGD - KERNEL_PGD_BOUNDARY) |
| 668 | |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 669 | #ifndef __ASSEMBLY__ |
| 670 | |
Jaswinder Singh Rajput | 2c1b284 | 2009-04-11 00:03:10 +0530 | [diff] [blame] | 671 | extern int direct_gbpages; |
Yinghai Lu | 22ddfca | 2012-11-16 19:38:41 -0800 | [diff] [blame] | 672 | void init_mem_mapping(void); |
Yinghai Lu | 8d57470 | 2012-11-16 19:38:58 -0800 | [diff] [blame] | 673 | void early_alloc_pgt_buf(void); |
Jaswinder Singh Rajput | 2c1b284 | 2009-04-11 00:03:10 +0530 | [diff] [blame] | 674 | |
Jeremy Fitzhardinge | 4891645 | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 675 | /* local pte updates need not use xchg for locking */ |
| 676 | static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep) |
| 677 | { |
| 678 | pte_t res = *ptep; |
| 679 | |
| 680 | /* Pure native function needs no input for mm, addr */ |
| 681 | native_pte_clear(NULL, 0, ptep); |
| 682 | return res; |
| 683 | } |
| 684 | |
Johannes Weiner | f2d6bfe | 2011-01-13 15:47:01 -0800 | [diff] [blame] | 685 | static inline pmd_t native_local_pmdp_get_and_clear(pmd_t *pmdp) |
| 686 | { |
| 687 | pmd_t res = *pmdp; |
| 688 | |
| 689 | native_pmd_clear(pmdp); |
| 690 | return res; |
| 691 | } |
| 692 | |
Jeremy Fitzhardinge | 4891645 | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 693 | static inline void native_set_pte_at(struct mm_struct *mm, unsigned long addr, |
| 694 | pte_t *ptep , pte_t pte) |
| 695 | { |
| 696 | native_set_pte(ptep, pte); |
| 697 | } |
| 698 | |
Andrea Arcangeli | 0a47de5 | 2011-01-13 15:46:35 -0800 | [diff] [blame] | 699 | static inline void native_set_pmd_at(struct mm_struct *mm, unsigned long addr, |
| 700 | pmd_t *pmdp , pmd_t pmd) |
| 701 | { |
| 702 | native_set_pmd(pmdp, pmd); |
| 703 | } |
| 704 | |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 705 | #ifndef CONFIG_PARAVIRT |
| 706 | /* |
| 707 | * Rules for using pte_update - it must be called after any PTE update which |
| 708 | * has not been done using the set_pte / clear_pte interfaces. It is used by |
| 709 | * shadow mode hypervisors to resynchronize the shadow page tables. Kernel PTE |
| 710 | * updates should either be sets, clears, or set_pte_atomic for P->P |
| 711 | * transitions, which means this hook should only be called for user PTEs. |
| 712 | * This hook implies a P->P protection or access change has taken place, which |
| 713 | * requires a subsequent TLB flush. The notification can optionally be delayed |
| 714 | * until the TLB flush event by using the pte_update_defer form of the |
| 715 | * interface, but care must be taken to assure that the flush happens while |
| 716 | * still holding the same page table lock so that the shadow and primary pages |
| 717 | * do not become out of sync on SMP. |
| 718 | */ |
| 719 | #define pte_update(mm, addr, ptep) do { } while (0) |
| 720 | #define pte_update_defer(mm, addr, ptep) do { } while (0) |
| 721 | #endif |
| 722 | |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 723 | /* |
| 724 | * We only update the dirty/accessed state if we set |
| 725 | * the dirty bit by hand in the kernel, since the hardware |
| 726 | * will do the accessed bit for us, and we don't want to |
| 727 | * race with other CPU's that might be updating the dirty |
| 728 | * bit at the same time. |
| 729 | */ |
Jeremy Fitzhardinge | bea4180 | 2008-06-25 00:18:57 -0400 | [diff] [blame] | 730 | struct vm_area_struct; |
| 731 | |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 732 | #define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS |
Jeremy Fitzhardinge | ee5aa8d | 2008-03-17 16:37:03 -0700 | [diff] [blame] | 733 | extern int ptep_set_access_flags(struct vm_area_struct *vma, |
| 734 | unsigned long address, pte_t *ptep, |
| 735 | pte_t entry, int dirty); |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 736 | |
| 737 | #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG |
Jeremy Fitzhardinge | f9fbf1a | 2008-03-17 16:37:04 -0700 | [diff] [blame] | 738 | extern int ptep_test_and_clear_young(struct vm_area_struct *vma, |
| 739 | unsigned long addr, pte_t *ptep); |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 740 | |
| 741 | #define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH |
Jeremy Fitzhardinge | c20311e | 2008-03-17 16:37:05 -0700 | [diff] [blame] | 742 | extern int ptep_clear_flush_young(struct vm_area_struct *vma, |
| 743 | unsigned long address, pte_t *ptep); |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 744 | |
| 745 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 746 | static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, |
| 747 | pte_t *ptep) |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 748 | { |
| 749 | pte_t pte = native_ptep_get_and_clear(ptep); |
| 750 | pte_update(mm, addr, ptep); |
| 751 | return pte; |
| 752 | } |
| 753 | |
| 754 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 755 | static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, |
| 756 | unsigned long addr, pte_t *ptep, |
| 757 | int full) |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 758 | { |
| 759 | pte_t pte; |
| 760 | if (full) { |
| 761 | /* |
| 762 | * Full address destruction in progress; paravirt does not |
| 763 | * care about updates and native needs no locking |
| 764 | */ |
| 765 | pte = native_local_ptep_get_and_clear(ptep); |
| 766 | } else { |
| 767 | pte = ptep_get_and_clear(mm, addr, ptep); |
| 768 | } |
| 769 | return pte; |
| 770 | } |
| 771 | |
| 772 | #define __HAVE_ARCH_PTEP_SET_WRPROTECT |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 773 | static inline void ptep_set_wrprotect(struct mm_struct *mm, |
| 774 | unsigned long addr, pte_t *ptep) |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 775 | { |
Jeremy Fitzhardinge | d8d8982 | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 776 | clear_bit(_PAGE_BIT_RW, (unsigned long *)&ptep->pte); |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 777 | pte_update(mm, addr, ptep); |
| 778 | } |
| 779 | |
Jesper Juhl | 2ac1346 | 2011-12-18 01:32:09 +0100 | [diff] [blame] | 780 | #define flush_tlb_fix_spurious_fault(vma, address) do { } while (0) |
Shaohua Li | 61c7732 | 2010-08-16 09:16:55 +0800 | [diff] [blame] | 781 | |
Johannes Weiner | f2d6bfe | 2011-01-13 15:47:01 -0800 | [diff] [blame] | 782 | #define mk_pmd(page, pgprot) pfn_pmd(page_to_pfn(page), (pgprot)) |
| 783 | |
| 784 | #define __HAVE_ARCH_PMDP_SET_ACCESS_FLAGS |
| 785 | extern int pmdp_set_access_flags(struct vm_area_struct *vma, |
| 786 | unsigned long address, pmd_t *pmdp, |
| 787 | pmd_t entry, int dirty); |
| 788 | |
| 789 | #define __HAVE_ARCH_PMDP_TEST_AND_CLEAR_YOUNG |
| 790 | extern int pmdp_test_and_clear_young(struct vm_area_struct *vma, |
| 791 | unsigned long addr, pmd_t *pmdp); |
| 792 | |
| 793 | #define __HAVE_ARCH_PMDP_CLEAR_YOUNG_FLUSH |
| 794 | extern int pmdp_clear_flush_young(struct vm_area_struct *vma, |
| 795 | unsigned long address, pmd_t *pmdp); |
| 796 | |
| 797 | |
| 798 | #define __HAVE_ARCH_PMDP_SPLITTING_FLUSH |
| 799 | extern void pmdp_splitting_flush(struct vm_area_struct *vma, |
| 800 | unsigned long addr, pmd_t *pmdp); |
| 801 | |
| 802 | #define __HAVE_ARCH_PMD_WRITE |
| 803 | static inline int pmd_write(pmd_t pmd) |
| 804 | { |
| 805 | return pmd_flags(pmd) & _PAGE_RW; |
| 806 | } |
| 807 | |
Aneesh Kumar K.V | 8809aa2 | 2015-06-24 16:57:44 -0700 | [diff] [blame] | 808 | #define __HAVE_ARCH_PMDP_HUGE_GET_AND_CLEAR |
| 809 | static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm, unsigned long addr, |
Johannes Weiner | f2d6bfe | 2011-01-13 15:47:01 -0800 | [diff] [blame] | 810 | pmd_t *pmdp) |
| 811 | { |
| 812 | pmd_t pmd = native_pmdp_get_and_clear(pmdp); |
| 813 | pmd_update(mm, addr, pmdp); |
| 814 | return pmd; |
| 815 | } |
| 816 | |
| 817 | #define __HAVE_ARCH_PMDP_SET_WRPROTECT |
| 818 | static inline void pmdp_set_wrprotect(struct mm_struct *mm, |
| 819 | unsigned long addr, pmd_t *pmdp) |
| 820 | { |
| 821 | clear_bit(_PAGE_BIT_RW, (unsigned long *)pmdp); |
| 822 | pmd_update(mm, addr, pmdp); |
| 823 | } |
| 824 | |
Jeremy Fitzhardinge | 85958b4 | 2008-03-17 16:37:14 -0700 | [diff] [blame] | 825 | /* |
| 826 | * clone_pgd_range(pgd_t *dst, pgd_t *src, int count); |
| 827 | * |
| 828 | * dst - pointer to pgd range anwhere on a pgd page |
| 829 | * src - "" |
| 830 | * count - the number of pgds to copy. |
| 831 | * |
| 832 | * dst and src can be on the same page, but the range must not overlap, |
| 833 | * and must not cross a page boundary. |
| 834 | */ |
| 835 | static inline void clone_pgd_range(pgd_t *dst, pgd_t *src, int count) |
| 836 | { |
| 837 | memcpy(dst, src, count * sizeof(pgd_t)); |
| 838 | } |
| 839 | |
Dave Hansen | 4cbeb51 | 2013-01-22 13:24:31 -0800 | [diff] [blame] | 840 | #define PTE_SHIFT ilog2(PTRS_PER_PTE) |
| 841 | static inline int page_level_shift(enum pg_level level) |
| 842 | { |
| 843 | return (PAGE_SHIFT - PTE_SHIFT) + level * PTE_SHIFT; |
| 844 | } |
| 845 | static inline unsigned long page_level_size(enum pg_level level) |
| 846 | { |
| 847 | return 1UL << page_level_shift(level); |
| 848 | } |
| 849 | static inline unsigned long page_level_mask(enum pg_level level) |
| 850 | { |
| 851 | return ~(page_level_size(level) - 1); |
| 852 | } |
Jeremy Fitzhardinge | 85958b4 | 2008-03-17 16:37:14 -0700 | [diff] [blame] | 853 | |
Kirill A. Shutemov | 602e018 | 2012-12-18 12:22:18 -0800 | [diff] [blame] | 854 | /* |
| 855 | * The x86 doesn't have any external MMU info: the kernel page |
| 856 | * tables contain all the necessary information. |
| 857 | */ |
| 858 | static inline void update_mmu_cache(struct vm_area_struct *vma, |
| 859 | unsigned long addr, pte_t *ptep) |
| 860 | { |
| 861 | } |
| 862 | static inline void update_mmu_cache_pmd(struct vm_area_struct *vma, |
| 863 | unsigned long addr, pmd_t *pmd) |
| 864 | { |
| 865 | } |
Thomas Gleixner | 96a388d | 2007-10-11 11:20:03 +0200 | [diff] [blame] | 866 | |
Cyrill Gorcunov | 2bf01f9 | 2014-06-04 16:08:16 -0700 | [diff] [blame] | 867 | #ifdef CONFIG_HAVE_ARCH_SOFT_DIRTY |
Cyrill Gorcunov | fa0f281 | 2013-09-11 14:22:47 -0700 | [diff] [blame] | 868 | static inline pte_t pte_swp_mksoft_dirty(pte_t pte) |
| 869 | { |
Cyrill Gorcunov | fa0f281 | 2013-09-11 14:22:47 -0700 | [diff] [blame] | 870 | return pte_set_flags(pte, _PAGE_SWP_SOFT_DIRTY); |
| 871 | } |
| 872 | |
| 873 | static inline int pte_swp_soft_dirty(pte_t pte) |
| 874 | { |
Cyrill Gorcunov | fa0f281 | 2013-09-11 14:22:47 -0700 | [diff] [blame] | 875 | return pte_flags(pte) & _PAGE_SWP_SOFT_DIRTY; |
| 876 | } |
| 877 | |
| 878 | static inline pte_t pte_swp_clear_soft_dirty(pte_t pte) |
| 879 | { |
Cyrill Gorcunov | fa0f281 | 2013-09-11 14:22:47 -0700 | [diff] [blame] | 880 | return pte_clear_flags(pte, _PAGE_SWP_SOFT_DIRTY); |
| 881 | } |
Cyrill Gorcunov | 2bf01f9 | 2014-06-04 16:08:16 -0700 | [diff] [blame] | 882 | #endif |
Cyrill Gorcunov | fa0f281 | 2013-09-11 14:22:47 -0700 | [diff] [blame] | 883 | |
Thomas Gleixner | 96a388d | 2007-10-11 11:20:03 +0200 | [diff] [blame] | 884 | #include <asm-generic/pgtable.h> |
| 885 | #endif /* __ASSEMBLY__ */ |
| 886 | |
H. Peter Anvin | 1965aae | 2008-10-22 22:26:29 -0700 | [diff] [blame] | 887 | #endif /* _ASM_X86_PGTABLE_H */ |