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); |
Stephen Smalley | e1a5832 | 2015-10-05 12:55:20 -0400 | [diff] [blame] | 22 | void ptdump_walk_pgd_level_checkwx(void); |
| 23 | |
| 24 | #ifdef CONFIG_DEBUG_WX |
| 25 | #define debug_checkwx() ptdump_walk_pgd_level_checkwx() |
| 26 | #else |
| 27 | #define debug_checkwx() do { } while (0) |
| 28 | #endif |
Borislav Petkov | ef6bea6 | 2014-01-18 12:48:14 +0100 | [diff] [blame] | 29 | |
Jeremy Fitzhardinge | 4614139 | 2008-01-30 13:32:56 +0100 | [diff] [blame] | 30 | /* |
Jeremy Fitzhardinge | 8405b12 | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 31 | * ZERO_PAGE is a global shared page that is always zero: used |
| 32 | * for zero-mapped memory areas etc.. |
| 33 | */ |
Andi Kleen | 277d5b4 | 2013-08-05 15:02:43 -0700 | [diff] [blame] | 34 | extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)] |
| 35 | __visible; |
Jeremy Fitzhardinge | 8405b12 | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 36 | #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) |
| 37 | |
Jeremy Fitzhardinge | e3ed910 | 2008-01-30 13:34:11 +0100 | [diff] [blame] | 38 | extern spinlock_t pgd_lock; |
| 39 | extern struct list_head pgd_list; |
Jeremy Fitzhardinge | 8405b12 | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 40 | |
Jeremy Fitzhardinge | 617d34d | 2010-09-21 12:01:51 -0700 | [diff] [blame] | 41 | extern struct mm_struct *pgd_page_get_mm(struct page *page); |
| 42 | |
Jeremy Fitzhardinge | 54321d9 | 2009-02-11 10:20:05 -0800 | [diff] [blame] | 43 | #ifdef CONFIG_PARAVIRT |
| 44 | #include <asm/paravirt.h> |
| 45 | #else /* !CONFIG_PARAVIRT */ |
| 46 | #define set_pte(ptep, pte) native_set_pte(ptep, pte) |
| 47 | #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] | 48 | #define set_pmd_at(mm, addr, pmdp, pmd) native_set_pmd_at(mm, addr, pmdp, pmd) |
Matthew Wilcox | a00cc7d | 2017-02-24 14:57:02 -0800 | [diff] [blame] | 49 | #define set_pud_at(mm, addr, pudp, pud) native_set_pud_at(mm, addr, pudp, pud) |
Jeremy Fitzhardinge | 54321d9 | 2009-02-11 10:20:05 -0800 | [diff] [blame] | 50 | |
Jeremy Fitzhardinge | 54321d9 | 2009-02-11 10:20:05 -0800 | [diff] [blame] | 51 | #define set_pte_atomic(ptep, pte) \ |
| 52 | native_set_pte_atomic(ptep, pte) |
| 53 | |
| 54 | #define set_pmd(pmdp, pmd) native_set_pmd(pmdp, pmd) |
| 55 | |
| 56 | #ifndef __PAGETABLE_PUD_FOLDED |
| 57 | #define set_pgd(pgdp, pgd) native_set_pgd(pgdp, pgd) |
| 58 | #define pgd_clear(pgd) native_pgd_clear(pgd) |
| 59 | #endif |
| 60 | |
| 61 | #ifndef set_pud |
| 62 | # define set_pud(pudp, pud) native_set_pud(pudp, pud) |
| 63 | #endif |
| 64 | |
| 65 | #ifndef __PAGETABLE_PMD_FOLDED |
| 66 | #define pud_clear(pud) native_pud_clear(pud) |
| 67 | #endif |
| 68 | |
| 69 | #define pte_clear(mm, addr, ptep) native_pte_clear(mm, addr, ptep) |
| 70 | #define pmd_clear(pmd) native_pmd_clear(pmd) |
| 71 | |
| 72 | #define pte_update(mm, addr, ptep) do { } while (0) |
Jeremy Fitzhardinge | 54321d9 | 2009-02-11 10:20:05 -0800 | [diff] [blame] | 73 | |
Jeremy Fitzhardinge | 54321d9 | 2009-02-11 10:20:05 -0800 | [diff] [blame] | 74 | #define pgd_val(x) native_pgd_val(x) |
| 75 | #define __pgd(x) native_make_pgd(x) |
| 76 | |
| 77 | #ifndef __PAGETABLE_PUD_FOLDED |
| 78 | #define pud_val(x) native_pud_val(x) |
| 79 | #define __pud(x) native_make_pud(x) |
| 80 | #endif |
| 81 | |
| 82 | #ifndef __PAGETABLE_PMD_FOLDED |
| 83 | #define pmd_val(x) native_pmd_val(x) |
| 84 | #define __pmd(x) native_make_pmd(x) |
| 85 | #endif |
| 86 | |
| 87 | #define pte_val(x) native_pte_val(x) |
| 88 | #define __pte(x) native_make_pte(x) |
| 89 | |
Jeremy Fitzhardinge | 224101e | 2009-02-18 11:18:57 -0800 | [diff] [blame] | 90 | #define arch_end_context_switch(prev) do {} while(0) |
| 91 | |
Jeremy Fitzhardinge | 54321d9 | 2009-02-11 10:20:05 -0800 | [diff] [blame] | 92 | #endif /* CONFIG_PARAVIRT */ |
| 93 | |
Jeremy Fitzhardinge | 8405b12 | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 94 | /* |
Jeremy Fitzhardinge | 4614139 | 2008-01-30 13:32:56 +0100 | [diff] [blame] | 95 | * The following only work if pte_present() is true. |
| 96 | * Undefined behaviour if not.. |
| 97 | */ |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 98 | static inline int pte_dirty(pte_t pte) |
| 99 | { |
Jeremy Fitzhardinge | a15af1c | 2008-05-26 23:31:06 +0100 | [diff] [blame] | 100 | return pte_flags(pte) & _PAGE_DIRTY; |
Jeremy Fitzhardinge | 4614139 | 2008-01-30 13:32:56 +0100 | [diff] [blame] | 101 | } |
| 102 | |
Dave Hansen | a927cb8 | 2016-02-12 13:02:15 -0800 | [diff] [blame] | 103 | |
| 104 | static inline u32 read_pkru(void) |
| 105 | { |
| 106 | if (boot_cpu_has(X86_FEATURE_OSPKE)) |
| 107 | return __read_pkru(); |
| 108 | return 0; |
| 109 | } |
| 110 | |
Xiao Guangrong | 9e90199 | 2016-03-22 16:51:17 +0800 | [diff] [blame] | 111 | static inline void write_pkru(u32 pkru) |
| 112 | { |
| 113 | if (boot_cpu_has(X86_FEATURE_OSPKE)) |
| 114 | __write_pkru(pkru); |
| 115 | } |
| 116 | |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 117 | static inline int pte_young(pte_t pte) |
| 118 | { |
Jeremy Fitzhardinge | a15af1c | 2008-05-26 23:31:06 +0100 | [diff] [blame] | 119 | return pte_flags(pte) & _PAGE_ACCESSED; |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 120 | } |
| 121 | |
Kirill A. Shutemov | c164e03 | 2014-12-10 15:44:36 -0800 | [diff] [blame] | 122 | static inline int pmd_dirty(pmd_t pmd) |
| 123 | { |
| 124 | return pmd_flags(pmd) & _PAGE_DIRTY; |
| 125 | } |
| 126 | |
Johannes Weiner | f2d6bfe | 2011-01-13 15:47:01 -0800 | [diff] [blame] | 127 | static inline int pmd_young(pmd_t pmd) |
| 128 | { |
| 129 | return pmd_flags(pmd) & _PAGE_ACCESSED; |
| 130 | } |
| 131 | |
Matthew Wilcox | a00cc7d | 2017-02-24 14:57:02 -0800 | [diff] [blame] | 132 | static inline int pud_dirty(pud_t pud) |
| 133 | { |
| 134 | return pud_flags(pud) & _PAGE_DIRTY; |
| 135 | } |
| 136 | |
| 137 | static inline int pud_young(pud_t pud) |
| 138 | { |
| 139 | return pud_flags(pud) & _PAGE_ACCESSED; |
| 140 | } |
| 141 | |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 142 | static inline int pte_write(pte_t pte) |
| 143 | { |
Jeremy Fitzhardinge | a15af1c | 2008-05-26 23:31:06 +0100 | [diff] [blame] | 144 | return pte_flags(pte) & _PAGE_RW; |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 145 | } |
| 146 | |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 147 | static inline int pte_huge(pte_t pte) |
| 148 | { |
Jeremy Fitzhardinge | a15af1c | 2008-05-26 23:31:06 +0100 | [diff] [blame] | 149 | return pte_flags(pte) & _PAGE_PSE; |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 150 | } |
| 151 | |
| 152 | static inline int pte_global(pte_t pte) |
| 153 | { |
Jeremy Fitzhardinge | a15af1c | 2008-05-26 23:31:06 +0100 | [diff] [blame] | 154 | return pte_flags(pte) & _PAGE_GLOBAL; |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 155 | } |
| 156 | |
| 157 | static inline int pte_exec(pte_t pte) |
| 158 | { |
Jeremy Fitzhardinge | a15af1c | 2008-05-26 23:31:06 +0100 | [diff] [blame] | 159 | return !(pte_flags(pte) & _PAGE_NX); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 160 | } |
| 161 | |
Nick Piggin | 7e67513 | 2008-04-28 02:13:00 -0700 | [diff] [blame] | 162 | static inline int pte_special(pte_t pte) |
| 163 | { |
Mel Gorman | c819f37 | 2015-02-12 14:58:38 -0800 | [diff] [blame] | 164 | return pte_flags(pte) & _PAGE_SPECIAL; |
Nick Piggin | 7e67513 | 2008-04-28 02:13:00 -0700 | [diff] [blame] | 165 | } |
| 166 | |
Hugh Dickins | 91030ca | 2008-09-09 16:42:45 +0100 | [diff] [blame] | 167 | static inline unsigned long pte_pfn(pte_t pte) |
| 168 | { |
| 169 | return (pte_val(pte) & PTE_PFN_MASK) >> PAGE_SHIFT; |
| 170 | } |
| 171 | |
Akinobu Mita | 087975b | 2009-06-27 15:35:15 +0900 | [diff] [blame] | 172 | static inline unsigned long pmd_pfn(pmd_t pmd) |
| 173 | { |
Toshi Kani | f70abb0 | 2015-09-17 12:24:17 -0600 | [diff] [blame] | 174 | return (pmd_val(pmd) & pmd_pfn_mask(pmd)) >> PAGE_SHIFT; |
Akinobu Mita | 087975b | 2009-06-27 15:35:15 +0900 | [diff] [blame] | 175 | } |
| 176 | |
Mel Gorman | 0ee364e | 2013-02-11 14:52:36 +0000 | [diff] [blame] | 177 | static inline unsigned long pud_pfn(pud_t pud) |
| 178 | { |
Toshi Kani | f70abb0 | 2015-09-17 12:24:17 -0600 | [diff] [blame] | 179 | return (pud_val(pud) & pud_pfn_mask(pud)) >> PAGE_SHIFT; |
Mel Gorman | 0ee364e | 2013-02-11 14:52:36 +0000 | [diff] [blame] | 180 | } |
| 181 | |
Hugh Dickins | 91030ca | 2008-09-09 16:42:45 +0100 | [diff] [blame] | 182 | #define pte_page(pte) pfn_to_page(pte_pfn(pte)) |
| 183 | |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 184 | static inline int pmd_large(pmd_t pte) |
| 185 | { |
Andrea Arcangeli | 027ef6c | 2012-10-08 16:33:27 -0700 | [diff] [blame] | 186 | return pmd_flags(pte) & _PAGE_PSE; |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 187 | } |
| 188 | |
Johannes Weiner | f2d6bfe | 2011-01-13 15:47:01 -0800 | [diff] [blame] | 189 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
Johannes Weiner | f2d6bfe | 2011-01-13 15:47:01 -0800 | [diff] [blame] | 190 | static inline int pmd_trans_huge(pmd_t pmd) |
| 191 | { |
Dan Williams | 5c7fb56 | 2016-01-15 16:56:52 -0800 | [diff] [blame] | 192 | return (pmd_val(pmd) & (_PAGE_PSE|_PAGE_DEVMAP)) == _PAGE_PSE; |
Johannes Weiner | f2d6bfe | 2011-01-13 15:47:01 -0800 | [diff] [blame] | 193 | } |
Andrea Arcangeli | 4b7167b | 2011-01-13 15:47:09 -0800 | [diff] [blame] | 194 | |
Matthew Wilcox | a00cc7d | 2017-02-24 14:57:02 -0800 | [diff] [blame] | 195 | #ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD |
| 196 | static inline int pud_trans_huge(pud_t pud) |
| 197 | { |
| 198 | return (pud_val(pud) & (_PAGE_PSE|_PAGE_DEVMAP)) == _PAGE_PSE; |
| 199 | } |
| 200 | #endif |
| 201 | |
Hugh Dickins | fd8cfd3 | 2016-05-19 17:13:00 -0700 | [diff] [blame] | 202 | #define has_transparent_hugepage has_transparent_hugepage |
Andrea Arcangeli | 4b7167b | 2011-01-13 15:47:09 -0800 | [diff] [blame] | 203 | static inline int has_transparent_hugepage(void) |
| 204 | { |
Borislav Petkov | 16bf922 | 2016-03-29 17:42:03 +0200 | [diff] [blame] | 205 | return boot_cpu_has(X86_FEATURE_PSE); |
Andrea Arcangeli | 4b7167b | 2011-01-13 15:47:09 -0800 | [diff] [blame] | 206 | } |
Dan Williams | 5c7fb56 | 2016-01-15 16:56:52 -0800 | [diff] [blame] | 207 | |
| 208 | #ifdef __HAVE_ARCH_PTE_DEVMAP |
| 209 | static inline int pmd_devmap(pmd_t pmd) |
| 210 | { |
| 211 | return !!(pmd_val(pmd) & _PAGE_DEVMAP); |
| 212 | } |
Matthew Wilcox | a00cc7d | 2017-02-24 14:57:02 -0800 | [diff] [blame] | 213 | |
| 214 | #ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD |
| 215 | static inline int pud_devmap(pud_t pud) |
| 216 | { |
| 217 | return !!(pud_val(pud) & _PAGE_DEVMAP); |
| 218 | } |
| 219 | #else |
| 220 | static inline int pud_devmap(pud_t pud) |
| 221 | { |
| 222 | return 0; |
| 223 | } |
| 224 | #endif |
Dan Williams | 5c7fb56 | 2016-01-15 16:56:52 -0800 | [diff] [blame] | 225 | #endif |
Johannes Weiner | f2d6bfe | 2011-01-13 15:47:01 -0800 | [diff] [blame] | 226 | #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ |
| 227 | |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 228 | static inline pte_t pte_set_flags(pte_t pte, pteval_t set) |
| 229 | { |
| 230 | pteval_t v = native_pte_val(pte); |
| 231 | |
| 232 | return native_make_pte(v | set); |
| 233 | } |
| 234 | |
| 235 | static inline pte_t pte_clear_flags(pte_t pte, pteval_t clear) |
| 236 | { |
| 237 | pteval_t v = native_pte_val(pte); |
| 238 | |
| 239 | return native_make_pte(v & ~clear); |
| 240 | } |
| 241 | |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 242 | static inline pte_t pte_mkclean(pte_t pte) |
| 243 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 244 | return pte_clear_flags(pte, _PAGE_DIRTY); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 245 | } |
| 246 | |
| 247 | static inline pte_t pte_mkold(pte_t pte) |
| 248 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 249 | return pte_clear_flags(pte, _PAGE_ACCESSED); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 250 | } |
| 251 | |
| 252 | static inline pte_t pte_wrprotect(pte_t pte) |
| 253 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 254 | return pte_clear_flags(pte, _PAGE_RW); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 255 | } |
| 256 | |
| 257 | static inline pte_t pte_mkexec(pte_t pte) |
| 258 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 259 | return pte_clear_flags(pte, _PAGE_NX); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 260 | } |
| 261 | |
| 262 | static inline pte_t pte_mkdirty(pte_t pte) |
| 263 | { |
Pavel Emelyanov | 0f8975e | 2013-07-03 15:01:20 -0700 | [diff] [blame] | 264 | return pte_set_flags(pte, _PAGE_DIRTY | _PAGE_SOFT_DIRTY); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 265 | } |
| 266 | |
| 267 | static inline pte_t pte_mkyoung(pte_t pte) |
| 268 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 269 | return pte_set_flags(pte, _PAGE_ACCESSED); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 270 | } |
| 271 | |
| 272 | static inline pte_t pte_mkwrite(pte_t pte) |
| 273 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 274 | return pte_set_flags(pte, _PAGE_RW); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 275 | } |
| 276 | |
| 277 | static inline pte_t pte_mkhuge(pte_t pte) |
| 278 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 279 | return pte_set_flags(pte, _PAGE_PSE); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 280 | } |
| 281 | |
| 282 | static inline pte_t pte_clrhuge(pte_t pte) |
| 283 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 284 | return pte_clear_flags(pte, _PAGE_PSE); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 285 | } |
| 286 | |
| 287 | static inline pte_t pte_mkglobal(pte_t pte) |
| 288 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 289 | return pte_set_flags(pte, _PAGE_GLOBAL); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 290 | } |
| 291 | |
| 292 | static inline pte_t pte_clrglobal(pte_t pte) |
| 293 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 294 | return pte_clear_flags(pte, _PAGE_GLOBAL); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 295 | } |
Jeremy Fitzhardinge | 4614139 | 2008-01-30 13:32:56 +0100 | [diff] [blame] | 296 | |
Nick Piggin | 7e67513 | 2008-04-28 02:13:00 -0700 | [diff] [blame] | 297 | static inline pte_t pte_mkspecial(pte_t pte) |
| 298 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 299 | return pte_set_flags(pte, _PAGE_SPECIAL); |
Nick Piggin | 7e67513 | 2008-04-28 02:13:00 -0700 | [diff] [blame] | 300 | } |
| 301 | |
Dan Williams | 01c8f1c | 2016-01-15 16:56:40 -0800 | [diff] [blame] | 302 | static inline pte_t pte_mkdevmap(pte_t pte) |
| 303 | { |
| 304 | return pte_set_flags(pte, _PAGE_SPECIAL|_PAGE_DEVMAP); |
| 305 | } |
| 306 | |
Johannes Weiner | f2d6bfe | 2011-01-13 15:47:01 -0800 | [diff] [blame] | 307 | static inline pmd_t pmd_set_flags(pmd_t pmd, pmdval_t set) |
| 308 | { |
| 309 | pmdval_t v = native_pmd_val(pmd); |
| 310 | |
| 311 | return __pmd(v | set); |
| 312 | } |
| 313 | |
| 314 | static inline pmd_t pmd_clear_flags(pmd_t pmd, pmdval_t clear) |
| 315 | { |
| 316 | pmdval_t v = native_pmd_val(pmd); |
| 317 | |
| 318 | return __pmd(v & ~clear); |
| 319 | } |
| 320 | |
| 321 | static inline pmd_t pmd_mkold(pmd_t pmd) |
| 322 | { |
| 323 | return pmd_clear_flags(pmd, _PAGE_ACCESSED); |
| 324 | } |
| 325 | |
Minchan Kim | 590a471 | 2016-01-15 16:55:20 -0800 | [diff] [blame] | 326 | static inline pmd_t pmd_mkclean(pmd_t pmd) |
| 327 | { |
| 328 | return pmd_clear_flags(pmd, _PAGE_DIRTY); |
| 329 | } |
| 330 | |
Johannes Weiner | f2d6bfe | 2011-01-13 15:47:01 -0800 | [diff] [blame] | 331 | static inline pmd_t pmd_wrprotect(pmd_t pmd) |
| 332 | { |
| 333 | return pmd_clear_flags(pmd, _PAGE_RW); |
| 334 | } |
| 335 | |
| 336 | static inline pmd_t pmd_mkdirty(pmd_t pmd) |
| 337 | { |
Pavel Emelyanov | 0f8975e | 2013-07-03 15:01:20 -0700 | [diff] [blame] | 338 | return pmd_set_flags(pmd, _PAGE_DIRTY | _PAGE_SOFT_DIRTY); |
Johannes Weiner | f2d6bfe | 2011-01-13 15:47:01 -0800 | [diff] [blame] | 339 | } |
| 340 | |
Dan Williams | f25748e3 | 2016-01-15 16:56:43 -0800 | [diff] [blame] | 341 | static inline pmd_t pmd_mkdevmap(pmd_t pmd) |
| 342 | { |
| 343 | return pmd_set_flags(pmd, _PAGE_DEVMAP); |
| 344 | } |
| 345 | |
Johannes Weiner | f2d6bfe | 2011-01-13 15:47:01 -0800 | [diff] [blame] | 346 | static inline pmd_t pmd_mkhuge(pmd_t pmd) |
| 347 | { |
| 348 | return pmd_set_flags(pmd, _PAGE_PSE); |
| 349 | } |
| 350 | |
| 351 | static inline pmd_t pmd_mkyoung(pmd_t pmd) |
| 352 | { |
| 353 | return pmd_set_flags(pmd, _PAGE_ACCESSED); |
| 354 | } |
| 355 | |
| 356 | static inline pmd_t pmd_mkwrite(pmd_t pmd) |
| 357 | { |
| 358 | return pmd_set_flags(pmd, _PAGE_RW); |
| 359 | } |
| 360 | |
| 361 | static inline pmd_t pmd_mknotpresent(pmd_t pmd) |
| 362 | { |
Mel Gorman | 21d9ee3 | 2015-02-12 14:58:32 -0800 | [diff] [blame] | 363 | return pmd_clear_flags(pmd, _PAGE_PRESENT | _PAGE_PROTNONE); |
Johannes Weiner | f2d6bfe | 2011-01-13 15:47:01 -0800 | [diff] [blame] | 364 | } |
| 365 | |
Matthew Wilcox | a00cc7d | 2017-02-24 14:57:02 -0800 | [diff] [blame] | 366 | static inline pud_t pud_set_flags(pud_t pud, pudval_t set) |
| 367 | { |
| 368 | pudval_t v = native_pud_val(pud); |
| 369 | |
| 370 | return __pud(v | set); |
| 371 | } |
| 372 | |
| 373 | static inline pud_t pud_clear_flags(pud_t pud, pudval_t clear) |
| 374 | { |
| 375 | pudval_t v = native_pud_val(pud); |
| 376 | |
| 377 | return __pud(v & ~clear); |
| 378 | } |
| 379 | |
| 380 | static inline pud_t pud_mkold(pud_t pud) |
| 381 | { |
| 382 | return pud_clear_flags(pud, _PAGE_ACCESSED); |
| 383 | } |
| 384 | |
| 385 | static inline pud_t pud_mkclean(pud_t pud) |
| 386 | { |
| 387 | return pud_clear_flags(pud, _PAGE_DIRTY); |
| 388 | } |
| 389 | |
| 390 | static inline pud_t pud_wrprotect(pud_t pud) |
| 391 | { |
| 392 | return pud_clear_flags(pud, _PAGE_RW); |
| 393 | } |
| 394 | |
| 395 | static inline pud_t pud_mkdirty(pud_t pud) |
| 396 | { |
| 397 | return pud_set_flags(pud, _PAGE_DIRTY | _PAGE_SOFT_DIRTY); |
| 398 | } |
| 399 | |
| 400 | static inline pud_t pud_mkdevmap(pud_t pud) |
| 401 | { |
| 402 | return pud_set_flags(pud, _PAGE_DEVMAP); |
| 403 | } |
| 404 | |
| 405 | static inline pud_t pud_mkhuge(pud_t pud) |
| 406 | { |
| 407 | return pud_set_flags(pud, _PAGE_PSE); |
| 408 | } |
| 409 | |
| 410 | static inline pud_t pud_mkyoung(pud_t pud) |
| 411 | { |
| 412 | return pud_set_flags(pud, _PAGE_ACCESSED); |
| 413 | } |
| 414 | |
| 415 | static inline pud_t pud_mkwrite(pud_t pud) |
| 416 | { |
| 417 | return pud_set_flags(pud, _PAGE_RW); |
| 418 | } |
| 419 | |
| 420 | static inline pud_t pud_mknotpresent(pud_t pud) |
| 421 | { |
| 422 | return pud_clear_flags(pud, _PAGE_PRESENT | _PAGE_PROTNONE); |
| 423 | } |
| 424 | |
Cyrill Gorcunov | 2bf01f9 | 2014-06-04 16:08:16 -0700 | [diff] [blame] | 425 | #ifdef CONFIG_HAVE_ARCH_SOFT_DIRTY |
Pavel Emelyanov | 0f8975e | 2013-07-03 15:01:20 -0700 | [diff] [blame] | 426 | static inline int pte_soft_dirty(pte_t pte) |
| 427 | { |
| 428 | return pte_flags(pte) & _PAGE_SOFT_DIRTY; |
| 429 | } |
| 430 | |
| 431 | static inline int pmd_soft_dirty(pmd_t pmd) |
| 432 | { |
| 433 | return pmd_flags(pmd) & _PAGE_SOFT_DIRTY; |
| 434 | } |
| 435 | |
Matthew Wilcox | a00cc7d | 2017-02-24 14:57:02 -0800 | [diff] [blame] | 436 | static inline int pud_soft_dirty(pud_t pud) |
| 437 | { |
| 438 | return pud_flags(pud) & _PAGE_SOFT_DIRTY; |
| 439 | } |
| 440 | |
Pavel Emelyanov | 0f8975e | 2013-07-03 15:01:20 -0700 | [diff] [blame] | 441 | static inline pte_t pte_mksoft_dirty(pte_t pte) |
| 442 | { |
| 443 | return pte_set_flags(pte, _PAGE_SOFT_DIRTY); |
| 444 | } |
| 445 | |
| 446 | static inline pmd_t pmd_mksoft_dirty(pmd_t pmd) |
| 447 | { |
| 448 | return pmd_set_flags(pmd, _PAGE_SOFT_DIRTY); |
| 449 | } |
| 450 | |
Matthew Wilcox | a00cc7d | 2017-02-24 14:57:02 -0800 | [diff] [blame] | 451 | static inline pud_t pud_mksoft_dirty(pud_t pud) |
| 452 | { |
| 453 | return pud_set_flags(pud, _PAGE_SOFT_DIRTY); |
| 454 | } |
| 455 | |
Martin Schwidefsky | a7b7617 | 2015-04-22 14:20:47 +0200 | [diff] [blame] | 456 | static inline pte_t pte_clear_soft_dirty(pte_t pte) |
| 457 | { |
| 458 | return pte_clear_flags(pte, _PAGE_SOFT_DIRTY); |
| 459 | } |
| 460 | |
| 461 | static inline pmd_t pmd_clear_soft_dirty(pmd_t pmd) |
| 462 | { |
| 463 | return pmd_clear_flags(pmd, _PAGE_SOFT_DIRTY); |
| 464 | } |
| 465 | |
Matthew Wilcox | a00cc7d | 2017-02-24 14:57:02 -0800 | [diff] [blame] | 466 | static inline pud_t pud_clear_soft_dirty(pud_t pud) |
| 467 | { |
| 468 | return pud_clear_flags(pud, _PAGE_SOFT_DIRTY); |
| 469 | } |
| 470 | |
Cyrill Gorcunov | 2bf01f9 | 2014-06-04 16:08:16 -0700 | [diff] [blame] | 471 | #endif /* CONFIG_HAVE_ARCH_SOFT_DIRTY */ |
| 472 | |
Jeremy Fitzhardinge | b534816 | 2009-02-04 18:33:38 -0800 | [diff] [blame] | 473 | /* |
| 474 | * Mask out unsupported bits in a present pgprot. Non-present pgprots |
| 475 | * can use those bits for other purposes, so leave them be. |
| 476 | */ |
| 477 | static inline pgprotval_t massage_pgprot(pgprot_t pgprot) |
| 478 | { |
| 479 | pgprotval_t protval = pgprot_val(pgprot); |
| 480 | |
| 481 | if (protval & _PAGE_PRESENT) |
| 482 | protval &= __supported_pte_mask; |
| 483 | |
| 484 | return protval; |
| 485 | } |
| 486 | |
Jeremy Fitzhardinge | 6fdc05d | 2008-01-30 13:32:57 +0100 | [diff] [blame] | 487 | static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot) |
| 488 | { |
Jeremy Fitzhardinge | b534816 | 2009-02-04 18:33:38 -0800 | [diff] [blame] | 489 | return __pte(((phys_addr_t)page_nr << PAGE_SHIFT) | |
| 490 | massage_pgprot(pgprot)); |
Jeremy Fitzhardinge | 6fdc05d | 2008-01-30 13:32:57 +0100 | [diff] [blame] | 491 | } |
| 492 | |
| 493 | static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot) |
| 494 | { |
Jeremy Fitzhardinge | b534816 | 2009-02-04 18:33:38 -0800 | [diff] [blame] | 495 | return __pmd(((phys_addr_t)page_nr << PAGE_SHIFT) | |
| 496 | massage_pgprot(pgprot)); |
Jeremy Fitzhardinge | 6fdc05d | 2008-01-30 13:32:57 +0100 | [diff] [blame] | 497 | } |
| 498 | |
Matthew Wilcox | a00cc7d | 2017-02-24 14:57:02 -0800 | [diff] [blame] | 499 | static inline pud_t pfn_pud(unsigned long page_nr, pgprot_t pgprot) |
| 500 | { |
| 501 | return __pud(((phys_addr_t)page_nr << PAGE_SHIFT) | |
| 502 | massage_pgprot(pgprot)); |
| 503 | } |
| 504 | |
Ingo Molnar | 3847231 | 2008-01-30 13:32:57 +0100 | [diff] [blame] | 505 | static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) |
| 506 | { |
| 507 | pteval_t val = pte_val(pte); |
| 508 | |
| 509 | /* |
| 510 | * Chop off the NX bit (if present), and add the NX portion of |
| 511 | * the newprot (if present): |
| 512 | */ |
Venki Pallipadi | 1c12c4c | 2008-05-14 16:05:51 -0700 | [diff] [blame] | 513 | val &= _PAGE_CHG_MASK; |
Jeremy Fitzhardinge | b534816 | 2009-02-04 18:33:38 -0800 | [diff] [blame] | 514 | val |= massage_pgprot(newprot) & ~_PAGE_CHG_MASK; |
Ingo Molnar | 3847231 | 2008-01-30 13:32:57 +0100 | [diff] [blame] | 515 | |
| 516 | return __pte(val); |
| 517 | } |
| 518 | |
Johannes Weiner | c489f12 | 2011-01-13 15:47:02 -0800 | [diff] [blame] | 519 | static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot) |
| 520 | { |
| 521 | pmdval_t val = pmd_val(pmd); |
| 522 | |
| 523 | val &= _HPAGE_CHG_MASK; |
| 524 | val |= massage_pgprot(newprot) & ~_HPAGE_CHG_MASK; |
| 525 | |
| 526 | return __pmd(val); |
| 527 | } |
| 528 | |
Venki Pallipadi | 1c12c4c | 2008-05-14 16:05:51 -0700 | [diff] [blame] | 529 | /* mprotect needs to preserve PAT bits when updating vm_page_prot */ |
| 530 | #define pgprot_modify pgprot_modify |
| 531 | static inline pgprot_t pgprot_modify(pgprot_t oldprot, pgprot_t newprot) |
| 532 | { |
| 533 | pgprotval_t preservebits = pgprot_val(oldprot) & _PAGE_CHG_MASK; |
| 534 | pgprotval_t addbits = pgprot_val(newprot); |
| 535 | return __pgprot(preservebits | addbits); |
| 536 | } |
| 537 | |
Toshi Kani | bbac8c6 | 2015-09-17 12:24:18 -0600 | [diff] [blame] | 538 | #define pte_pgprot(x) __pgprot(pte_flags(x)) |
| 539 | #define pmd_pgprot(x) __pgprot(pmd_flags(x)) |
| 540 | #define pud_pgprot(x) __pgprot(pud_flags(x)) |
Andi Kleen | c6ca18e | 2008-01-30 13:33:51 +0100 | [diff] [blame] | 541 | |
Jeremy Fitzhardinge | b534816 | 2009-02-04 18:33:38 -0800 | [diff] [blame] | 542 | #define canon_pgprot(p) __pgprot(massage_pgprot(p)) |
Andi Kleen | 1e8e23b | 2008-01-30 13:33:53 +0100 | [diff] [blame] | 543 | |
Suresh Siddha | 1adcaaf | 2009-08-17 13:23:50 -0700 | [diff] [blame] | 544 | static inline int is_new_memtype_allowed(u64 paddr, unsigned long size, |
Juergen Gross | d85f333 | 2014-11-03 14:01:53 +0100 | [diff] [blame] | 545 | enum page_cache_mode pcm, |
| 546 | enum page_cache_mode new_pcm) |
venkatesh.pallipadi@intel.com | afc7d20 | 2009-01-09 16:13:10 -0800 | [diff] [blame] | 547 | { |
| 548 | /* |
H. Peter Anvin | 55a6ca2 | 2009-11-23 15:12:07 -0800 | [diff] [blame] | 549 | * 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] | 550 | */ |
H. Peter Anvin | 8a27138 | 2009-11-23 14:49:20 -0800 | [diff] [blame] | 551 | if (x86_platform.is_untracked_pat_range(paddr, paddr + size)) |
Suresh Siddha | 1adcaaf | 2009-08-17 13:23:50 -0700 | [diff] [blame] | 552 | return 1; |
| 553 | |
| 554 | /* |
venkatesh.pallipadi@intel.com | afc7d20 | 2009-01-09 16:13:10 -0800 | [diff] [blame] | 555 | * Certain new memtypes are not allowed with certain |
| 556 | * requested memtype: |
| 557 | * - request is uncached, return cannot be write-back |
| 558 | * - request is write-combine, return cannot be write-back |
Toshi Kani | ecb2feb | 2015-06-04 18:55:14 +0200 | [diff] [blame] | 559 | * - request is write-through, return cannot be write-back |
| 560 | * - request is write-through, return cannot be write-combine |
venkatesh.pallipadi@intel.com | afc7d20 | 2009-01-09 16:13:10 -0800 | [diff] [blame] | 561 | */ |
Juergen Gross | d85f333 | 2014-11-03 14:01:53 +0100 | [diff] [blame] | 562 | if ((pcm == _PAGE_CACHE_MODE_UC_MINUS && |
| 563 | new_pcm == _PAGE_CACHE_MODE_WB) || |
| 564 | (pcm == _PAGE_CACHE_MODE_WC && |
Toshi Kani | ecb2feb | 2015-06-04 18:55:14 +0200 | [diff] [blame] | 565 | new_pcm == _PAGE_CACHE_MODE_WB) || |
| 566 | (pcm == _PAGE_CACHE_MODE_WT && |
| 567 | new_pcm == _PAGE_CACHE_MODE_WB) || |
| 568 | (pcm == _PAGE_CACHE_MODE_WT && |
| 569 | new_pcm == _PAGE_CACHE_MODE_WC)) { |
venkatesh.pallipadi@intel.com | afc7d20 | 2009-01-09 16:13:10 -0800 | [diff] [blame] | 570 | return 0; |
| 571 | } |
| 572 | |
| 573 | return 1; |
| 574 | } |
| 575 | |
Tejun Heo | 458a3e6 | 2009-02-24 11:57:21 +0900 | [diff] [blame] | 576 | pmd_t *populate_extra_pmd(unsigned long vaddr); |
| 577 | pte_t *populate_extra_pte(unsigned long vaddr); |
Jeremy Fitzhardinge | 4614139 | 2008-01-30 13:32:56 +0100 | [diff] [blame] | 578 | #endif /* __ASSEMBLY__ */ |
| 579 | |
Thomas Gleixner | 96a388d | 2007-10-11 11:20:03 +0200 | [diff] [blame] | 580 | #ifdef CONFIG_X86_32 |
David Howells | a1ce392 | 2012-10-02 18:01:25 +0100 | [diff] [blame] | 581 | # include <asm/pgtable_32.h> |
Thomas Gleixner | 96a388d | 2007-10-11 11:20:03 +0200 | [diff] [blame] | 582 | #else |
David Howells | a1ce392 | 2012-10-02 18:01:25 +0100 | [diff] [blame] | 583 | # include <asm/pgtable_64.h> |
Thomas Gleixner | 96a388d | 2007-10-11 11:20:03 +0200 | [diff] [blame] | 584 | #endif |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 585 | |
Jeremy Fitzhardinge | aca159d | 2009-02-05 11:30:54 -0800 | [diff] [blame] | 586 | #ifndef __ASSEMBLY__ |
Jeremy Fitzhardinge | f476961 | 2009-02-05 11:30:55 -0800 | [diff] [blame] | 587 | #include <linux/mm_types.h> |
Cyrill Gorcunov | fa0f281 | 2013-09-11 14:22:47 -0700 | [diff] [blame] | 588 | #include <linux/mmdebug.h> |
Dave Hansen | 4cbeb51 | 2013-01-22 13:24:31 -0800 | [diff] [blame] | 589 | #include <linux/log2.h> |
Jeremy Fitzhardinge | aca159d | 2009-02-05 11:30:54 -0800 | [diff] [blame] | 590 | |
Jeremy Fitzhardinge | a034a01 | 2009-02-05 11:30:43 -0800 | [diff] [blame] | 591 | static inline int pte_none(pte_t pte) |
| 592 | { |
Dave Hansen | 97e3c60 | 2016-07-07 17:19:12 -0700 | [diff] [blame] | 593 | return !(pte.pte & ~(_PAGE_KNL_ERRATUM_MASK)); |
Jeremy Fitzhardinge | a034a01 | 2009-02-05 11:30:43 -0800 | [diff] [blame] | 594 | } |
| 595 | |
Jeremy Fitzhardinge | 8de01da | 2009-02-05 11:30:44 -0800 | [diff] [blame] | 596 | #define __HAVE_ARCH_PTE_SAME |
| 597 | static inline int pte_same(pte_t a, pte_t b) |
| 598 | { |
| 599 | return a.pte == b.pte; |
| 600 | } |
| 601 | |
Jeremy Fitzhardinge | 7c68385 | 2009-02-05 11:30:45 -0800 | [diff] [blame] | 602 | static inline int pte_present(pte_t a) |
| 603 | { |
Mel Gorman | c46a7c8 | 2014-06-04 16:06:30 -0700 | [diff] [blame] | 604 | return pte_flags(a) & (_PAGE_PRESENT | _PAGE_PROTNONE); |
| 605 | } |
| 606 | |
Dan Williams | 3565fce | 2016-01-15 16:56:55 -0800 | [diff] [blame] | 607 | #ifdef __HAVE_ARCH_PTE_DEVMAP |
| 608 | static inline int pte_devmap(pte_t a) |
| 609 | { |
| 610 | return (pte_flags(a) & _PAGE_DEVMAP) == _PAGE_DEVMAP; |
| 611 | } |
| 612 | #endif |
| 613 | |
Rik van Riel | 2c3cf55 | 2012-10-09 15:31:12 +0200 | [diff] [blame] | 614 | #define pte_accessible pte_accessible |
Rik van Riel | 2084140 | 2013-12-18 17:08:44 -0800 | [diff] [blame] | 615 | 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] | 616 | { |
Rik van Riel | 2084140 | 2013-12-18 17:08:44 -0800 | [diff] [blame] | 617 | if (pte_flags(a) & _PAGE_PRESENT) |
| 618 | return true; |
| 619 | |
Mel Gorman | 21d9ee3 | 2015-02-12 14:58:32 -0800 | [diff] [blame] | 620 | if ((pte_flags(a) & _PAGE_PROTNONE) && |
Rik van Riel | 2084140 | 2013-12-18 17:08:44 -0800 | [diff] [blame] | 621 | mm_tlb_flush_pending(mm)) |
| 622 | return true; |
| 623 | |
| 624 | return false; |
Rik van Riel | 2c3cf55 | 2012-10-09 15:31:12 +0200 | [diff] [blame] | 625 | } |
| 626 | |
Jeremy Fitzhardinge | eb63657 | 2009-02-06 13:05:56 -0800 | [diff] [blame] | 627 | static inline int pte_hidden(pte_t pte) |
Vegard Nossum | dfec072 | 2008-04-04 00:51:41 +0200 | [diff] [blame] | 628 | { |
Jeremy Fitzhardinge | eb63657 | 2009-02-06 13:05:56 -0800 | [diff] [blame] | 629 | return pte_flags(pte) & _PAGE_HIDDEN; |
Vegard Nossum | dfec072 | 2008-04-04 00:51:41 +0200 | [diff] [blame] | 630 | } |
| 631 | |
Jeremy Fitzhardinge | 649e8ef | 2009-02-05 11:30:50 -0800 | [diff] [blame] | 632 | static inline int pmd_present(pmd_t pmd) |
| 633 | { |
Andrea Arcangeli | 027ef6c | 2012-10-08 16:33:27 -0700 | [diff] [blame] | 634 | /* |
| 635 | * Checking for _PAGE_PSE is needed too because |
| 636 | * split_huge_page will temporarily clear the present bit (but |
| 637 | * the _PAGE_PSE flag will remain set at all times while the |
| 638 | * _PAGE_PRESENT bit is clear). |
| 639 | */ |
Mel Gorman | 21d9ee3 | 2015-02-12 14:58:32 -0800 | [diff] [blame] | 640 | return pmd_flags(pmd) & (_PAGE_PRESENT | _PAGE_PROTNONE | _PAGE_PSE); |
Jeremy Fitzhardinge | 649e8ef | 2009-02-05 11:30:50 -0800 | [diff] [blame] | 641 | } |
| 642 | |
Mel Gorman | e7bb4b6d | 2015-02-12 14:58:19 -0800 | [diff] [blame] | 643 | #ifdef CONFIG_NUMA_BALANCING |
| 644 | /* |
| 645 | * These work without NUMA balancing but the kernel does not care. See the |
| 646 | * comment in include/asm-generic/pgtable.h |
| 647 | */ |
| 648 | static inline int pte_protnone(pte_t pte) |
| 649 | { |
David Vrabel | e3a1f6c | 2015-02-19 13:06:53 +0000 | [diff] [blame] | 650 | return (pte_flags(pte) & (_PAGE_PROTNONE | _PAGE_PRESENT)) |
| 651 | == _PAGE_PROTNONE; |
Mel Gorman | e7bb4b6d | 2015-02-12 14:58:19 -0800 | [diff] [blame] | 652 | } |
| 653 | |
| 654 | static inline int pmd_protnone(pmd_t pmd) |
| 655 | { |
David Vrabel | e3a1f6c | 2015-02-19 13:06:53 +0000 | [diff] [blame] | 656 | return (pmd_flags(pmd) & (_PAGE_PROTNONE | _PAGE_PRESENT)) |
| 657 | == _PAGE_PROTNONE; |
Mel Gorman | e7bb4b6d | 2015-02-12 14:58:19 -0800 | [diff] [blame] | 658 | } |
| 659 | #endif /* CONFIG_NUMA_BALANCING */ |
| 660 | |
Jeremy Fitzhardinge | 4fea801 | 2009-02-05 11:30:51 -0800 | [diff] [blame] | 661 | static inline int pmd_none(pmd_t pmd) |
| 662 | { |
| 663 | /* Only check low word on 32-bit platforms, since it might be |
| 664 | out of sync with upper half. */ |
Dave Hansen | 97e3c60 | 2016-07-07 17:19:12 -0700 | [diff] [blame] | 665 | unsigned long val = native_pmd_val(pmd); |
| 666 | return (val & ~_PAGE_KNL_ERRATUM_MASK) == 0; |
Jeremy Fitzhardinge | 4fea801 | 2009-02-05 11:30:51 -0800 | [diff] [blame] | 667 | } |
| 668 | |
Jeremy Fitzhardinge | 3ffb356 | 2009-02-05 11:30:59 -0800 | [diff] [blame] | 669 | static inline unsigned long pmd_page_vaddr(pmd_t pmd) |
| 670 | { |
Toshi Kani | f70abb0 | 2015-09-17 12:24:17 -0600 | [diff] [blame] | 671 | return (unsigned long)__va(pmd_val(pmd) & pmd_pfn_mask(pmd)); |
Jeremy Fitzhardinge | 3ffb356 | 2009-02-05 11:30:59 -0800 | [diff] [blame] | 672 | } |
| 673 | |
Ingo Molnar | e5f7f202 | 2009-02-09 11:42:57 +0100 | [diff] [blame] | 674 | /* |
| 675 | * Currently stuck as a macro due to indirect forward reference to |
| 676 | * linux/mmzone.h's __section_mem_map_addr() definition: |
| 677 | */ |
Toshi Kani | f70abb0 | 2015-09-17 12:24:17 -0600 | [diff] [blame] | 678 | #define pmd_page(pmd) \ |
| 679 | pfn_to_page((pmd_val(pmd) & pmd_pfn_mask(pmd)) >> PAGE_SHIFT) |
Jeremy Fitzhardinge | 20063ca | 2009-02-05 11:31:00 -0800 | [diff] [blame] | 680 | |
Jeremy Fitzhardinge | e24d7ee | 2009-02-05 11:31:01 -0800 | [diff] [blame] | 681 | /* |
| 682 | * the pmd page can be thought of an array like this: pmd_t[PTRS_PER_PMD] |
| 683 | * |
| 684 | * this macro returns the index of the entry in the pmd page which would |
| 685 | * control the given virtual address |
| 686 | */ |
Figo.zhang | ce0c0f9 | 2009-06-28 18:07:39 +0800 | [diff] [blame] | 687 | static inline unsigned long pmd_index(unsigned long address) |
Jeremy Fitzhardinge | e24d7ee | 2009-02-05 11:31:01 -0800 | [diff] [blame] | 688 | { |
| 689 | return (address >> PMD_SHIFT) & (PTRS_PER_PMD - 1); |
| 690 | } |
| 691 | |
Jeremy Fitzhardinge | 97e2817 | 2009-02-05 11:31:05 -0800 | [diff] [blame] | 692 | /* |
| 693 | * Conversion functions: convert a page and protection to a page entry, |
| 694 | * and a page entry and page directory to the page they refer to. |
| 695 | * |
| 696 | * (Currently stuck as a macro because of indirect forward reference |
| 697 | * to linux/mm.h:page_to_nid()) |
| 698 | */ |
| 699 | #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) |
| 700 | |
Jeremy Fitzhardinge | 346309c | 2009-02-05 11:31:06 -0800 | [diff] [blame] | 701 | /* |
| 702 | * the pte page can be thought of an array like this: pte_t[PTRS_PER_PTE] |
| 703 | * |
| 704 | * this function returns the index of the entry in the pte page which would |
| 705 | * control the given virtual address |
| 706 | */ |
Figo.zhang | ce0c0f9 | 2009-06-28 18:07:39 +0800 | [diff] [blame] | 707 | static inline unsigned long pte_index(unsigned long address) |
Jeremy Fitzhardinge | 346309c | 2009-02-05 11:31:06 -0800 | [diff] [blame] | 708 | { |
| 709 | return (address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1); |
| 710 | } |
| 711 | |
Jeremy Fitzhardinge | 3fbc244 | 2009-02-05 11:31:07 -0800 | [diff] [blame] | 712 | static inline pte_t *pte_offset_kernel(pmd_t *pmd, unsigned long address) |
| 713 | { |
| 714 | return (pte_t *)pmd_page_vaddr(*pmd) + pte_index(address); |
| 715 | } |
| 716 | |
Jeremy Fitzhardinge | 9951023 | 2009-02-05 11:31:11 -0800 | [diff] [blame] | 717 | static inline int pmd_bad(pmd_t pmd) |
| 718 | { |
Jeremy Fitzhardinge | 18a7a199 | 2009-02-05 11:31:16 -0800 | [diff] [blame] | 719 | return (pmd_flags(pmd) & ~_PAGE_USER) != _KERNPG_TABLE; |
Jeremy Fitzhardinge | 9951023 | 2009-02-05 11:31:11 -0800 | [diff] [blame] | 720 | } |
| 721 | |
Jeremy Fitzhardinge | cc290ca | 2009-02-05 11:31:12 -0800 | [diff] [blame] | 722 | static inline unsigned long pages_to_mb(unsigned long npg) |
| 723 | { |
| 724 | return npg >> (20 - PAGE_SHIFT); |
| 725 | } |
| 726 | |
Kirill A. Shutemov | 9823336 | 2015-04-14 15:46:14 -0700 | [diff] [blame] | 727 | #if CONFIG_PGTABLE_LEVELS > 2 |
Jeremy Fitzhardinge | deb79cf | 2009-02-05 11:31:13 -0800 | [diff] [blame] | 728 | static inline int pud_none(pud_t pud) |
| 729 | { |
Dave Hansen | 97e3c60 | 2016-07-07 17:19:12 -0700 | [diff] [blame] | 730 | return (native_pud_val(pud) & ~(_PAGE_KNL_ERRATUM_MASK)) == 0; |
Jeremy Fitzhardinge | deb79cf | 2009-02-05 11:31:13 -0800 | [diff] [blame] | 731 | } |
| 732 | |
Jeremy Fitzhardinge | 5ba7c91 | 2009-02-05 11:30:48 -0800 | [diff] [blame] | 733 | static inline int pud_present(pud_t pud) |
| 734 | { |
Jeremy Fitzhardinge | 18a7a199 | 2009-02-05 11:31:16 -0800 | [diff] [blame] | 735 | return pud_flags(pud) & _PAGE_PRESENT; |
Jeremy Fitzhardinge | 5ba7c91 | 2009-02-05 11:30:48 -0800 | [diff] [blame] | 736 | } |
Jeremy Fitzhardinge | 6fff47e | 2009-02-05 11:30:53 -0800 | [diff] [blame] | 737 | |
| 738 | static inline unsigned long pud_page_vaddr(pud_t pud) |
| 739 | { |
Toshi Kani | f70abb0 | 2015-09-17 12:24:17 -0600 | [diff] [blame] | 740 | return (unsigned long)__va(pud_val(pud) & pud_pfn_mask(pud)); |
Jeremy Fitzhardinge | 6fff47e | 2009-02-05 11:30:53 -0800 | [diff] [blame] | 741 | } |
Jeremy Fitzhardinge | f476961 | 2009-02-05 11:30:55 -0800 | [diff] [blame] | 742 | |
Ingo Molnar | e5f7f202 | 2009-02-09 11:42:57 +0100 | [diff] [blame] | 743 | /* |
| 744 | * Currently stuck as a macro due to indirect forward reference to |
| 745 | * linux/mmzone.h's __section_mem_map_addr() definition: |
| 746 | */ |
Toshi Kani | f70abb0 | 2015-09-17 12:24:17 -0600 | [diff] [blame] | 747 | #define pud_page(pud) \ |
| 748 | pfn_to_page((pud_val(pud) & pud_pfn_mask(pud)) >> PAGE_SHIFT) |
Jeremy Fitzhardinge | 01ade20d5a | 2009-02-05 11:31:02 -0800 | [diff] [blame] | 749 | |
| 750 | /* Find an entry in the second-level page table.. */ |
| 751 | static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address) |
| 752 | { |
| 753 | return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(address); |
| 754 | } |
Jeremy Fitzhardinge | 3180fba | 2009-02-05 11:31:04 -0800 | [diff] [blame] | 755 | |
Jeremy Fitzhardinge | 3f6cbef | 2009-02-05 11:31:08 -0800 | [diff] [blame] | 756 | static inline int pud_large(pud_t pud) |
| 757 | { |
Jeremy Fitzhardinge | e2f5bda | 2009-02-09 00:09:52 -0800 | [diff] [blame] | 758 | return (pud_val(pud) & (_PAGE_PSE | _PAGE_PRESENT)) == |
Jeremy Fitzhardinge | 3f6cbef | 2009-02-05 11:31:08 -0800 | [diff] [blame] | 759 | (_PAGE_PSE | _PAGE_PRESENT); |
| 760 | } |
Jeremy Fitzhardinge | a61bb29 | 2009-02-05 11:31:10 -0800 | [diff] [blame] | 761 | |
| 762 | static inline int pud_bad(pud_t pud) |
| 763 | { |
Jeremy Fitzhardinge | 18a7a199 | 2009-02-05 11:31:16 -0800 | [diff] [blame] | 764 | return (pud_flags(pud) & ~(_KERNPG_TABLE | _PAGE_USER)) != 0; |
Jeremy Fitzhardinge | a61bb29 | 2009-02-05 11:31:10 -0800 | [diff] [blame] | 765 | } |
Jeremy Fitzhardinge | e2f5bda | 2009-02-09 00:09:52 -0800 | [diff] [blame] | 766 | #else |
| 767 | static inline int pud_large(pud_t pud) |
| 768 | { |
| 769 | return 0; |
| 770 | } |
Kirill A. Shutemov | 9823336 | 2015-04-14 15:46:14 -0700 | [diff] [blame] | 771 | #endif /* CONFIG_PGTABLE_LEVELS > 2 */ |
Jeremy Fitzhardinge | 5ba7c91 | 2009-02-05 11:30:48 -0800 | [diff] [blame] | 772 | |
Kirill A. Shutemov | 9823336 | 2015-04-14 15:46:14 -0700 | [diff] [blame] | 773 | #if CONFIG_PGTABLE_LEVELS > 3 |
Jeremy Fitzhardinge | 9f38d7e | 2009-02-05 11:30:49 -0800 | [diff] [blame] | 774 | static inline int pgd_present(pgd_t pgd) |
| 775 | { |
Jeremy Fitzhardinge | 18a7a199 | 2009-02-05 11:31:16 -0800 | [diff] [blame] | 776 | return pgd_flags(pgd) & _PAGE_PRESENT; |
Jeremy Fitzhardinge | 9f38d7e | 2009-02-05 11:30:49 -0800 | [diff] [blame] | 777 | } |
Jeremy Fitzhardinge | c5f040b | 2009-02-05 11:30:52 -0800 | [diff] [blame] | 778 | |
| 779 | static inline unsigned long pgd_page_vaddr(pgd_t pgd) |
| 780 | { |
| 781 | return (unsigned long)__va((unsigned long)pgd_val(pgd) & PTE_PFN_MASK); |
| 782 | } |
Jeremy Fitzhardinge | 777cba1 | 2009-02-05 11:30:56 -0800 | [diff] [blame] | 783 | |
Ingo Molnar | e5f7f202 | 2009-02-09 11:42:57 +0100 | [diff] [blame] | 784 | /* |
| 785 | * Currently stuck as a macro due to indirect forward reference to |
| 786 | * linux/mmzone.h's __section_mem_map_addr() definition: |
| 787 | */ |
| 788 | #define pgd_page(pgd) pfn_to_page(pgd_val(pgd) >> PAGE_SHIFT) |
Jeremy Fitzhardinge | 7cfb810 | 2009-02-05 11:30:57 -0800 | [diff] [blame] | 789 | |
| 790 | /* to find an entry in a page-table-directory. */ |
Figo.zhang | ce0c0f9 | 2009-06-28 18:07:39 +0800 | [diff] [blame] | 791 | static inline unsigned long pud_index(unsigned long address) |
Jeremy Fitzhardinge | 7cfb810 | 2009-02-05 11:30:57 -0800 | [diff] [blame] | 792 | { |
| 793 | return (address >> PUD_SHIFT) & (PTRS_PER_PUD - 1); |
| 794 | } |
Jeremy Fitzhardinge | 3d081b1 | 2009-02-05 11:30:58 -0800 | [diff] [blame] | 795 | |
| 796 | static inline pud_t *pud_offset(pgd_t *pgd, unsigned long address) |
| 797 | { |
| 798 | return (pud_t *)pgd_page_vaddr(*pgd) + pud_index(address); |
| 799 | } |
Jeremy Fitzhardinge | 30f1031 | 2009-02-05 11:31:09 -0800 | [diff] [blame] | 800 | |
| 801 | static inline int pgd_bad(pgd_t pgd) |
| 802 | { |
Jeremy Fitzhardinge | 18a7a199 | 2009-02-05 11:31:16 -0800 | [diff] [blame] | 803 | return (pgd_flags(pgd) & ~_PAGE_USER) != _KERNPG_TABLE; |
Jeremy Fitzhardinge | 30f1031 | 2009-02-05 11:31:09 -0800 | [diff] [blame] | 804 | } |
Jeremy Fitzhardinge | 7325cc2 | 2009-02-05 11:31:14 -0800 | [diff] [blame] | 805 | |
| 806 | static inline int pgd_none(pgd_t pgd) |
| 807 | { |
Dave Hansen | 97e3c60 | 2016-07-07 17:19:12 -0700 | [diff] [blame] | 808 | /* |
| 809 | * There is no need to do a workaround for the KNL stray |
| 810 | * A/D bit erratum here. PGDs only point to page tables |
| 811 | * except on 32-bit non-PAE which is not supported on |
| 812 | * KNL. |
| 813 | */ |
Jeremy Fitzhardinge | 26c8e31 | 2009-02-05 11:31:17 -0800 | [diff] [blame] | 814 | return !native_pgd_val(pgd); |
Jeremy Fitzhardinge | 7325cc2 | 2009-02-05 11:31:14 -0800 | [diff] [blame] | 815 | } |
Kirill A. Shutemov | 9823336 | 2015-04-14 15:46:14 -0700 | [diff] [blame] | 816 | #endif /* CONFIG_PGTABLE_LEVELS > 3 */ |
Jeremy Fitzhardinge | 9f38d7e | 2009-02-05 11:30:49 -0800 | [diff] [blame] | 817 | |
Thomas Gleixner | 96a388d | 2007-10-11 11:20:03 +0200 | [diff] [blame] | 818 | #endif /* __ASSEMBLY__ */ |
| 819 | |
Jeremy Fitzhardinge | fb15a9b | 2008-06-25 00:19:06 -0400 | [diff] [blame] | 820 | /* |
| 821 | * the pgd page can be thought of an array like this: pgd_t[PTRS_PER_PGD] |
| 822 | * |
| 823 | * this macro returns the index of the entry in the pgd page which would |
| 824 | * control the given virtual address |
| 825 | */ |
| 826 | #define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1)) |
| 827 | |
| 828 | /* |
| 829 | * pgd_offset() returns a (pgd_t *) |
| 830 | * pgd_index() is used get the offset into the pgd page's array of pgd_t's; |
| 831 | */ |
| 832 | #define pgd_offset(mm, address) ((mm)->pgd + pgd_index((address))) |
| 833 | /* |
| 834 | * a shortcut which implies the use of the kernel's pgd, instead |
| 835 | * of a process's |
| 836 | */ |
| 837 | #define pgd_offset_k(address) pgd_offset(&init_mm, (address)) |
| 838 | |
| 839 | |
Jeremy Fitzhardinge | 68db065 | 2008-03-17 16:37:13 -0700 | [diff] [blame] | 840 | #define KERNEL_PGD_BOUNDARY pgd_index(PAGE_OFFSET) |
| 841 | #define KERNEL_PGD_PTRS (PTRS_PER_PGD - KERNEL_PGD_BOUNDARY) |
| 842 | |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 843 | #ifndef __ASSEMBLY__ |
| 844 | |
Jaswinder Singh Rajput | 2c1b284 | 2009-04-11 00:03:10 +0530 | [diff] [blame] | 845 | extern int direct_gbpages; |
Yinghai Lu | 22ddfca | 2012-11-16 19:38:41 -0800 | [diff] [blame] | 846 | void init_mem_mapping(void); |
Yinghai Lu | 8d57470 | 2012-11-16 19:38:58 -0800 | [diff] [blame] | 847 | void early_alloc_pgt_buf(void); |
Jaswinder Singh Rajput | 2c1b284 | 2009-04-11 00:03:10 +0530 | [diff] [blame] | 848 | |
Thomas Garnier | b234e8a | 2016-06-21 17:47:01 -0700 | [diff] [blame] | 849 | #ifdef CONFIG_X86_64 |
| 850 | /* Realmode trampoline initialization. */ |
| 851 | extern pgd_t trampoline_pgd_entry; |
Thomas Garnier | 0483e1f | 2016-06-21 17:47:02 -0700 | [diff] [blame] | 852 | static inline void __meminit init_trampoline_default(void) |
Thomas Garnier | b234e8a | 2016-06-21 17:47:01 -0700 | [diff] [blame] | 853 | { |
| 854 | /* Default trampoline pgd value */ |
| 855 | trampoline_pgd_entry = init_level4_pgt[pgd_index(__PAGE_OFFSET)]; |
| 856 | } |
Thomas Garnier | 0483e1f | 2016-06-21 17:47:02 -0700 | [diff] [blame] | 857 | # ifdef CONFIG_RANDOMIZE_MEMORY |
| 858 | void __meminit init_trampoline(void); |
| 859 | # else |
| 860 | # define init_trampoline init_trampoline_default |
| 861 | # endif |
Thomas Garnier | b234e8a | 2016-06-21 17:47:01 -0700 | [diff] [blame] | 862 | #else |
| 863 | static inline void init_trampoline(void) { } |
| 864 | #endif |
| 865 | |
Jeremy Fitzhardinge | 4891645 | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 866 | /* local pte updates need not use xchg for locking */ |
| 867 | static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep) |
| 868 | { |
| 869 | pte_t res = *ptep; |
| 870 | |
| 871 | /* Pure native function needs no input for mm, addr */ |
| 872 | native_pte_clear(NULL, 0, ptep); |
| 873 | return res; |
| 874 | } |
| 875 | |
Johannes Weiner | f2d6bfe | 2011-01-13 15:47:01 -0800 | [diff] [blame] | 876 | static inline pmd_t native_local_pmdp_get_and_clear(pmd_t *pmdp) |
| 877 | { |
| 878 | pmd_t res = *pmdp; |
| 879 | |
| 880 | native_pmd_clear(pmdp); |
| 881 | return res; |
| 882 | } |
| 883 | |
Matthew Wilcox | a00cc7d | 2017-02-24 14:57:02 -0800 | [diff] [blame] | 884 | static inline pud_t native_local_pudp_get_and_clear(pud_t *pudp) |
| 885 | { |
| 886 | pud_t res = *pudp; |
| 887 | |
| 888 | native_pud_clear(pudp); |
| 889 | return res; |
| 890 | } |
| 891 | |
Jeremy Fitzhardinge | 4891645 | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 892 | static inline void native_set_pte_at(struct mm_struct *mm, unsigned long addr, |
| 893 | pte_t *ptep , pte_t pte) |
| 894 | { |
| 895 | native_set_pte(ptep, pte); |
| 896 | } |
| 897 | |
Andrea Arcangeli | 0a47de5 | 2011-01-13 15:46:35 -0800 | [diff] [blame] | 898 | static inline void native_set_pmd_at(struct mm_struct *mm, unsigned long addr, |
| 899 | pmd_t *pmdp , pmd_t pmd) |
| 900 | { |
| 901 | native_set_pmd(pmdp, pmd); |
| 902 | } |
| 903 | |
Matthew Wilcox | a00cc7d | 2017-02-24 14:57:02 -0800 | [diff] [blame] | 904 | static inline void native_set_pud_at(struct mm_struct *mm, unsigned long addr, |
| 905 | pud_t *pudp, pud_t pud) |
| 906 | { |
| 907 | native_set_pud(pudp, pud); |
| 908 | } |
| 909 | |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 910 | #ifndef CONFIG_PARAVIRT |
| 911 | /* |
| 912 | * Rules for using pte_update - it must be called after any PTE update which |
| 913 | * has not been done using the set_pte / clear_pte interfaces. It is used by |
| 914 | * shadow mode hypervisors to resynchronize the shadow page tables. Kernel PTE |
| 915 | * updates should either be sets, clears, or set_pte_atomic for P->P |
| 916 | * transitions, which means this hook should only be called for user PTEs. |
| 917 | * This hook implies a P->P protection or access change has taken place, which |
Juergen Gross | d6ccc3e | 2015-11-17 15:51:19 +0100 | [diff] [blame] | 918 | * requires a subsequent TLB flush. |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 919 | */ |
| 920 | #define pte_update(mm, addr, ptep) do { } while (0) |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 921 | #endif |
| 922 | |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 923 | /* |
| 924 | * We only update the dirty/accessed state if we set |
| 925 | * the dirty bit by hand in the kernel, since the hardware |
| 926 | * will do the accessed bit for us, and we don't want to |
| 927 | * race with other CPU's that might be updating the dirty |
| 928 | * bit at the same time. |
| 929 | */ |
Jeremy Fitzhardinge | bea4180 | 2008-06-25 00:18:57 -0400 | [diff] [blame] | 930 | struct vm_area_struct; |
| 931 | |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 932 | #define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS |
Jeremy Fitzhardinge | ee5aa8d | 2008-03-17 16:37:03 -0700 | [diff] [blame] | 933 | extern int ptep_set_access_flags(struct vm_area_struct *vma, |
| 934 | unsigned long address, pte_t *ptep, |
| 935 | pte_t entry, int dirty); |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 936 | |
| 937 | #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG |
Jeremy Fitzhardinge | f9fbf1a | 2008-03-17 16:37:04 -0700 | [diff] [blame] | 938 | extern int ptep_test_and_clear_young(struct vm_area_struct *vma, |
| 939 | unsigned long addr, pte_t *ptep); |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 940 | |
| 941 | #define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH |
Jeremy Fitzhardinge | c20311e | 2008-03-17 16:37:05 -0700 | [diff] [blame] | 942 | extern int ptep_clear_flush_young(struct vm_area_struct *vma, |
| 943 | unsigned long address, pte_t *ptep); |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 944 | |
| 945 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 946 | static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, |
| 947 | pte_t *ptep) |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 948 | { |
| 949 | pte_t pte = native_ptep_get_and_clear(ptep); |
| 950 | pte_update(mm, addr, ptep); |
| 951 | return pte; |
| 952 | } |
| 953 | |
| 954 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 955 | static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, |
| 956 | unsigned long addr, pte_t *ptep, |
| 957 | int full) |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 958 | { |
| 959 | pte_t pte; |
| 960 | if (full) { |
| 961 | /* |
| 962 | * Full address destruction in progress; paravirt does not |
| 963 | * care about updates and native needs no locking |
| 964 | */ |
| 965 | pte = native_local_ptep_get_and_clear(ptep); |
| 966 | } else { |
| 967 | pte = ptep_get_and_clear(mm, addr, ptep); |
| 968 | } |
| 969 | return pte; |
| 970 | } |
| 971 | |
| 972 | #define __HAVE_ARCH_PTEP_SET_WRPROTECT |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 973 | static inline void ptep_set_wrprotect(struct mm_struct *mm, |
| 974 | unsigned long addr, pte_t *ptep) |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 975 | { |
Jeremy Fitzhardinge | d8d8982 | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 976 | clear_bit(_PAGE_BIT_RW, (unsigned long *)&ptep->pte); |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 977 | pte_update(mm, addr, ptep); |
| 978 | } |
| 979 | |
Jesper Juhl | 2ac1346 | 2011-12-18 01:32:09 +0100 | [diff] [blame] | 980 | #define flush_tlb_fix_spurious_fault(vma, address) do { } while (0) |
Shaohua Li | 61c7732 | 2010-08-16 09:16:55 +0800 | [diff] [blame] | 981 | |
Johannes Weiner | f2d6bfe | 2011-01-13 15:47:01 -0800 | [diff] [blame] | 982 | #define mk_pmd(page, pgprot) pfn_pmd(page_to_pfn(page), (pgprot)) |
| 983 | |
| 984 | #define __HAVE_ARCH_PMDP_SET_ACCESS_FLAGS |
| 985 | extern int pmdp_set_access_flags(struct vm_area_struct *vma, |
| 986 | unsigned long address, pmd_t *pmdp, |
| 987 | pmd_t entry, int dirty); |
Matthew Wilcox | a00cc7d | 2017-02-24 14:57:02 -0800 | [diff] [blame] | 988 | extern int pudp_set_access_flags(struct vm_area_struct *vma, |
| 989 | unsigned long address, pud_t *pudp, |
| 990 | pud_t entry, int dirty); |
Johannes Weiner | f2d6bfe | 2011-01-13 15:47:01 -0800 | [diff] [blame] | 991 | |
| 992 | #define __HAVE_ARCH_PMDP_TEST_AND_CLEAR_YOUNG |
| 993 | extern int pmdp_test_and_clear_young(struct vm_area_struct *vma, |
| 994 | unsigned long addr, pmd_t *pmdp); |
Matthew Wilcox | a00cc7d | 2017-02-24 14:57:02 -0800 | [diff] [blame] | 995 | extern int pudp_test_and_clear_young(struct vm_area_struct *vma, |
| 996 | unsigned long addr, pud_t *pudp); |
Johannes Weiner | f2d6bfe | 2011-01-13 15:47:01 -0800 | [diff] [blame] | 997 | |
| 998 | #define __HAVE_ARCH_PMDP_CLEAR_YOUNG_FLUSH |
| 999 | extern int pmdp_clear_flush_young(struct vm_area_struct *vma, |
| 1000 | unsigned long address, pmd_t *pmdp); |
| 1001 | |
| 1002 | |
Johannes Weiner | f2d6bfe | 2011-01-13 15:47:01 -0800 | [diff] [blame] | 1003 | #define __HAVE_ARCH_PMD_WRITE |
| 1004 | static inline int pmd_write(pmd_t pmd) |
| 1005 | { |
| 1006 | return pmd_flags(pmd) & _PAGE_RW; |
| 1007 | } |
| 1008 | |
Aneesh Kumar K.V | 8809aa2 | 2015-06-24 16:57:44 -0700 | [diff] [blame] | 1009 | #define __HAVE_ARCH_PMDP_HUGE_GET_AND_CLEAR |
| 1010 | 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] | 1011 | pmd_t *pmdp) |
| 1012 | { |
Juergen Gross | d6ccc3e | 2015-11-17 15:51:19 +0100 | [diff] [blame] | 1013 | return native_pmdp_get_and_clear(pmdp); |
Johannes Weiner | f2d6bfe | 2011-01-13 15:47:01 -0800 | [diff] [blame] | 1014 | } |
| 1015 | |
Matthew Wilcox | a00cc7d | 2017-02-24 14:57:02 -0800 | [diff] [blame] | 1016 | #define __HAVE_ARCH_PUDP_HUGE_GET_AND_CLEAR |
| 1017 | static inline pud_t pudp_huge_get_and_clear(struct mm_struct *mm, |
| 1018 | unsigned long addr, pud_t *pudp) |
| 1019 | { |
| 1020 | return native_pudp_get_and_clear(pudp); |
| 1021 | } |
| 1022 | |
Johannes Weiner | f2d6bfe | 2011-01-13 15:47:01 -0800 | [diff] [blame] | 1023 | #define __HAVE_ARCH_PMDP_SET_WRPROTECT |
| 1024 | static inline void pmdp_set_wrprotect(struct mm_struct *mm, |
| 1025 | unsigned long addr, pmd_t *pmdp) |
| 1026 | { |
| 1027 | clear_bit(_PAGE_BIT_RW, (unsigned long *)pmdp); |
Johannes Weiner | f2d6bfe | 2011-01-13 15:47:01 -0800 | [diff] [blame] | 1028 | } |
| 1029 | |
Jeremy Fitzhardinge | 85958b4 | 2008-03-17 16:37:14 -0700 | [diff] [blame] | 1030 | /* |
| 1031 | * clone_pgd_range(pgd_t *dst, pgd_t *src, int count); |
| 1032 | * |
| 1033 | * dst - pointer to pgd range anwhere on a pgd page |
| 1034 | * src - "" |
| 1035 | * count - the number of pgds to copy. |
| 1036 | * |
| 1037 | * dst and src can be on the same page, but the range must not overlap, |
| 1038 | * and must not cross a page boundary. |
| 1039 | */ |
| 1040 | static inline void clone_pgd_range(pgd_t *dst, pgd_t *src, int count) |
| 1041 | { |
| 1042 | memcpy(dst, src, count * sizeof(pgd_t)); |
| 1043 | } |
| 1044 | |
Dave Hansen | 4cbeb51 | 2013-01-22 13:24:31 -0800 | [diff] [blame] | 1045 | #define PTE_SHIFT ilog2(PTRS_PER_PTE) |
| 1046 | static inline int page_level_shift(enum pg_level level) |
| 1047 | { |
| 1048 | return (PAGE_SHIFT - PTE_SHIFT) + level * PTE_SHIFT; |
| 1049 | } |
| 1050 | static inline unsigned long page_level_size(enum pg_level level) |
| 1051 | { |
| 1052 | return 1UL << page_level_shift(level); |
| 1053 | } |
| 1054 | static inline unsigned long page_level_mask(enum pg_level level) |
| 1055 | { |
| 1056 | return ~(page_level_size(level) - 1); |
| 1057 | } |
Jeremy Fitzhardinge | 85958b4 | 2008-03-17 16:37:14 -0700 | [diff] [blame] | 1058 | |
Kirill A. Shutemov | 602e018 | 2012-12-18 12:22:18 -0800 | [diff] [blame] | 1059 | /* |
| 1060 | * The x86 doesn't have any external MMU info: the kernel page |
| 1061 | * tables contain all the necessary information. |
| 1062 | */ |
| 1063 | static inline void update_mmu_cache(struct vm_area_struct *vma, |
| 1064 | unsigned long addr, pte_t *ptep) |
| 1065 | { |
| 1066 | } |
| 1067 | static inline void update_mmu_cache_pmd(struct vm_area_struct *vma, |
| 1068 | unsigned long addr, pmd_t *pmd) |
| 1069 | { |
| 1070 | } |
Matthew Wilcox | a00cc7d | 2017-02-24 14:57:02 -0800 | [diff] [blame] | 1071 | static inline void update_mmu_cache_pud(struct vm_area_struct *vma, |
| 1072 | unsigned long addr, pud_t *pud) |
| 1073 | { |
| 1074 | } |
Thomas Gleixner | 96a388d | 2007-10-11 11:20:03 +0200 | [diff] [blame] | 1075 | |
Cyrill Gorcunov | 2bf01f9 | 2014-06-04 16:08:16 -0700 | [diff] [blame] | 1076 | #ifdef CONFIG_HAVE_ARCH_SOFT_DIRTY |
Cyrill Gorcunov | fa0f281 | 2013-09-11 14:22:47 -0700 | [diff] [blame] | 1077 | static inline pte_t pte_swp_mksoft_dirty(pte_t pte) |
| 1078 | { |
Cyrill Gorcunov | fa0f281 | 2013-09-11 14:22:47 -0700 | [diff] [blame] | 1079 | return pte_set_flags(pte, _PAGE_SWP_SOFT_DIRTY); |
| 1080 | } |
| 1081 | |
| 1082 | static inline int pte_swp_soft_dirty(pte_t pte) |
| 1083 | { |
Cyrill Gorcunov | fa0f281 | 2013-09-11 14:22:47 -0700 | [diff] [blame] | 1084 | return pte_flags(pte) & _PAGE_SWP_SOFT_DIRTY; |
| 1085 | } |
| 1086 | |
| 1087 | static inline pte_t pte_swp_clear_soft_dirty(pte_t pte) |
| 1088 | { |
Cyrill Gorcunov | fa0f281 | 2013-09-11 14:22:47 -0700 | [diff] [blame] | 1089 | return pte_clear_flags(pte, _PAGE_SWP_SOFT_DIRTY); |
| 1090 | } |
Cyrill Gorcunov | 2bf01f9 | 2014-06-04 16:08:16 -0700 | [diff] [blame] | 1091 | #endif |
Cyrill Gorcunov | fa0f281 | 2013-09-11 14:22:47 -0700 | [diff] [blame] | 1092 | |
Dave Hansen | 33a709b | 2016-02-12 13:02:19 -0800 | [diff] [blame] | 1093 | #define PKRU_AD_BIT 0x1 |
| 1094 | #define PKRU_WD_BIT 0x2 |
Dave Hansen | 8459429 | 2016-02-12 13:02:36 -0800 | [diff] [blame] | 1095 | #define PKRU_BITS_PER_PKEY 2 |
Dave Hansen | 33a709b | 2016-02-12 13:02:19 -0800 | [diff] [blame] | 1096 | |
| 1097 | static inline bool __pkru_allows_read(u32 pkru, u16 pkey) |
| 1098 | { |
Dave Hansen | 8459429 | 2016-02-12 13:02:36 -0800 | [diff] [blame] | 1099 | int pkru_pkey_bits = pkey * PKRU_BITS_PER_PKEY; |
Dave Hansen | 33a709b | 2016-02-12 13:02:19 -0800 | [diff] [blame] | 1100 | return !(pkru & (PKRU_AD_BIT << pkru_pkey_bits)); |
| 1101 | } |
| 1102 | |
| 1103 | static inline bool __pkru_allows_write(u32 pkru, u16 pkey) |
| 1104 | { |
Dave Hansen | 8459429 | 2016-02-12 13:02:36 -0800 | [diff] [blame] | 1105 | int pkru_pkey_bits = pkey * PKRU_BITS_PER_PKEY; |
Dave Hansen | 33a709b | 2016-02-12 13:02:19 -0800 | [diff] [blame] | 1106 | /* |
| 1107 | * Access-disable disables writes too so we need to check |
| 1108 | * both bits here. |
| 1109 | */ |
| 1110 | return !(pkru & ((PKRU_AD_BIT|PKRU_WD_BIT) << pkru_pkey_bits)); |
| 1111 | } |
| 1112 | |
| 1113 | static inline u16 pte_flags_pkey(unsigned long pte_flags) |
| 1114 | { |
| 1115 | #ifdef CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS |
| 1116 | /* ifdef to avoid doing 59-bit shift on 32-bit values */ |
| 1117 | return (pte_flags & _PAGE_PKEY_MASK) >> _PAGE_BIT_PKEY_BIT0; |
| 1118 | #else |
| 1119 | return 0; |
| 1120 | #endif |
| 1121 | } |
| 1122 | |
Thomas Gleixner | 96a388d | 2007-10-11 11:20:03 +0200 | [diff] [blame] | 1123 | #include <asm-generic/pgtable.h> |
| 1124 | #endif /* __ASSEMBLY__ */ |
| 1125 | |
H. Peter Anvin | 1965aae | 2008-10-22 22:26:29 -0700 | [diff] [blame] | 1126 | #endif /* _ASM_X86_PGTABLE_H */ |