1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_X86_PGTABLE_DEFS_H 3 #define _ASM_X86_PGTABLE_DEFS_H 4 5 #include <linux/const.h> 6 #include <linux/mem_encrypt.h> 7 8 #include <asm/page_types.h> 9 10 #define _PAGE_BIT_PRESENT 0 /* is present */ 11 #define _PAGE_BIT_RW 1 /* writeable */ 12 #define _PAGE_BIT_USER 2 /* userspace addressable */ 13 #define _PAGE_BIT_PWT 3 /* page write through */ 14 #define _PAGE_BIT_PCD 4 /* page cache disabled */ 15 #define _PAGE_BIT_ACCESSED 5 /* was accessed (raised by CPU) */ 16 #define _PAGE_BIT_DIRTY 6 /* was written to (raised by CPU) */ 17 #define _PAGE_BIT_PSE 7 /* 4 MB (or 2MB) page */ 18 #define _PAGE_BIT_PAT 7 /* on 4KB pages */ 19 #define _PAGE_BIT_GLOBAL 8 /* Global TLB entry PPro+ */ 20 #define _PAGE_BIT_SOFTW1 9 /* available for programmer */ 21 #define _PAGE_BIT_SOFTW2 10 /* " */ 22 #define _PAGE_BIT_SOFTW3 11 /* " */ 23 #define _PAGE_BIT_PAT_LARGE 12 /* On 2MB or 1GB pages */ 24 #define _PAGE_BIT_SOFTW4 57 /* available for programmer */ 25 #define _PAGE_BIT_SOFTW5 58 /* available for programmer */ 26 #define _PAGE_BIT_PKEY_BIT0 59 /* Protection Keys, bit 1/4 */ 27 #define _PAGE_BIT_PKEY_BIT1 60 /* Protection Keys, bit 2/4 */ 28 #define _PAGE_BIT_PKEY_BIT2 61 /* Protection Keys, bit 3/4 */ 29 #define _PAGE_BIT_PKEY_BIT3 62 /* Protection Keys, bit 4/4 */ 30 #define _PAGE_BIT_NX 63 /* No execute: only valid after cpuid check */ 31 32 #define _PAGE_BIT_SPECIAL _PAGE_BIT_SOFTW1 33 #define _PAGE_BIT_CPA_TEST _PAGE_BIT_SOFTW1 34 #define _PAGE_BIT_UFFD_WP _PAGE_BIT_SOFTW2 /* userfaultfd wrprotected */ 35 #define _PAGE_BIT_SOFT_DIRTY _PAGE_BIT_SOFTW3 /* software dirty tracking */ 36 #define _PAGE_BIT_DEVMAP _PAGE_BIT_SOFTW4 37 38 #ifdef CONFIG_X86_64 39 #define _PAGE_BIT_SAVED_DIRTY _PAGE_BIT_SOFTW5 /* Saved Dirty bit */ 40 #else 41 /* Shared with _PAGE_BIT_UFFD_WP which is not supported on 32 bit */ 42 #define _PAGE_BIT_SAVED_DIRTY _PAGE_BIT_SOFTW2 /* Saved Dirty bit */ 43 #endif 44 45 /* If _PAGE_BIT_PRESENT is clear, we use these: */ 46 /* - if the user mapped it with PROT_NONE; pte_present gives true */ 47 #define _PAGE_BIT_PROTNONE _PAGE_BIT_GLOBAL 48 49 #define _PAGE_PRESENT (_AT(pteval_t, 1) << _PAGE_BIT_PRESENT) 50 #define _PAGE_RW (_AT(pteval_t, 1) << _PAGE_BIT_RW) 51 #define _PAGE_USER (_AT(pteval_t, 1) << _PAGE_BIT_USER) 52 #define _PAGE_PWT (_AT(pteval_t, 1) << _PAGE_BIT_PWT) 53 #define _PAGE_PCD (_AT(pteval_t, 1) << _PAGE_BIT_PCD) 54 #define _PAGE_ACCESSED (_AT(pteval_t, 1) << _PAGE_BIT_ACCESSED) 55 #define _PAGE_DIRTY (_AT(pteval_t, 1) << _PAGE_BIT_DIRTY) 56 #define _PAGE_PSE (_AT(pteval_t, 1) << _PAGE_BIT_PSE) 57 #define _PAGE_GLOBAL (_AT(pteval_t, 1) << _PAGE_BIT_GLOBAL) 58 #define _PAGE_SOFTW1 (_AT(pteval_t, 1) << _PAGE_BIT_SOFTW1) 59 #define _PAGE_SOFTW2 (_AT(pteval_t, 1) << _PAGE_BIT_SOFTW2) 60 #define _PAGE_SOFTW3 (_AT(pteval_t, 1) << _PAGE_BIT_SOFTW3) 61 #define _PAGE_PAT (_AT(pteval_t, 1) << _PAGE_BIT_PAT) 62 #define _PAGE_PAT_LARGE (_AT(pteval_t, 1) << _PAGE_BIT_PAT_LARGE) 63 #define _PAGE_SPECIAL (_AT(pteval_t, 1) << _PAGE_BIT_SPECIAL) 64 #define _PAGE_CPA_TEST (_AT(pteval_t, 1) << _PAGE_BIT_CPA_TEST) 65 #ifdef CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS 66 #define _PAGE_PKEY_BIT0 (_AT(pteval_t, 1) << _PAGE_BIT_PKEY_BIT0) 67 #define _PAGE_PKEY_BIT1 (_AT(pteval_t, 1) << _PAGE_BIT_PKEY_BIT1) 68 #define _PAGE_PKEY_BIT2 (_AT(pteval_t, 1) << _PAGE_BIT_PKEY_BIT2) 69 #define _PAGE_PKEY_BIT3 (_AT(pteval_t, 1) << _PAGE_BIT_PKEY_BIT3) 70 #else 71 #define _PAGE_PKEY_BIT0 (_AT(pteval_t, 0)) 72 #define _PAGE_PKEY_BIT1 (_AT(pteval_t, 0)) 73 #define _PAGE_PKEY_BIT2 (_AT(pteval_t, 0)) 74 #define _PAGE_PKEY_BIT3 (_AT(pteval_t, 0)) 75 #endif 76 77 #define _PAGE_PKEY_MASK (_PAGE_PKEY_BIT0 | \ 78 _PAGE_PKEY_BIT1 | \ 79 _PAGE_PKEY_BIT2 | \ 80 _PAGE_PKEY_BIT3) 81 82 #if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE) 83 #define _PAGE_KNL_ERRATUM_MASK (_PAGE_DIRTY | _PAGE_ACCESSED) 84 #else 85 #define _PAGE_KNL_ERRATUM_MASK 0 86 #endif 87 88 #ifdef CONFIG_MEM_SOFT_DIRTY 89 #define _PAGE_SOFT_DIRTY (_AT(pteval_t, 1) << _PAGE_BIT_SOFT_DIRTY) 90 #else 91 #define _PAGE_SOFT_DIRTY (_AT(pteval_t, 0)) 92 #endif 93 94 /* 95 * Tracking soft dirty bit when a page goes to a swap is tricky. 96 * We need a bit which can be stored in pte _and_ not conflict 97 * with swap entry format. On x86 bits 1-4 are *not* involved 98 * into swap entry computation, but bit 7 is used for thp migration, 99 * so we borrow bit 1 for soft dirty tracking. 100 * 101 * Please note that this bit must be treated as swap dirty page 102 * mark if and only if the PTE/PMD has present bit clear! 103 */ 104 #ifdef CONFIG_MEM_SOFT_DIRTY 105 #define _PAGE_SWP_SOFT_DIRTY _PAGE_RW 106 #else 107 #define _PAGE_SWP_SOFT_DIRTY (_AT(pteval_t, 0)) 108 #endif 109 110 #ifdef CONFIG_HAVE_ARCH_USERFAULTFD_WP 111 #define _PAGE_UFFD_WP (_AT(pteval_t, 1) << _PAGE_BIT_UFFD_WP) 112 #define _PAGE_SWP_UFFD_WP _PAGE_USER 113 #else 114 #define _PAGE_UFFD_WP (_AT(pteval_t, 0)) 115 #define _PAGE_SWP_UFFD_WP (_AT(pteval_t, 0)) 116 #endif 117 118 #if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE) 119 #define _PAGE_NX (_AT(pteval_t, 1) << _PAGE_BIT_NX) 120 #define _PAGE_DEVMAP (_AT(u64, 1) << _PAGE_BIT_DEVMAP) 121 #define _PAGE_SOFTW4 (_AT(pteval_t, 1) << _PAGE_BIT_SOFTW4) 122 #else 123 #define _PAGE_NX (_AT(pteval_t, 0)) 124 #define _PAGE_DEVMAP (_AT(pteval_t, 0)) 125 #define _PAGE_SOFTW4 (_AT(pteval_t, 0)) 126 #endif 127 128 /* 129 * The hardware requires shadow stack to be Write=0,Dirty=1. However, 130 * there are valid cases where the kernel might create read-only PTEs that 131 * are dirty (e.g., fork(), mprotect(), uffd-wp(), soft-dirty tracking). In 132 * this case, the _PAGE_SAVED_DIRTY bit is used instead of the HW-dirty bit, 133 * to avoid creating a wrong "shadow stack" PTEs. Such PTEs have 134 * (Write=0,SavedDirty=1,Dirty=0) set. 135 */ 136 #define _PAGE_SAVED_DIRTY (_AT(pteval_t, 1) << _PAGE_BIT_SAVED_DIRTY) 137 138 #define _PAGE_DIRTY_BITS (_PAGE_DIRTY | _PAGE_SAVED_DIRTY) 139 140 #define _PAGE_PROTNONE (_AT(pteval_t, 1) << _PAGE_BIT_PROTNONE) 141 142 /* 143 * Set of bits not changed in pte_modify. The pte's 144 * protection key is treated like _PAGE_RW, for 145 * instance, and is *not* included in this mask since 146 * pte_modify() does modify it. 147 */ 148 #define _COMMON_PAGE_CHG_MASK (PTE_PFN_MASK | _PAGE_PCD | _PAGE_PWT | \ 149 _PAGE_SPECIAL | _PAGE_ACCESSED | \ 150 _PAGE_DIRTY_BITS | _PAGE_SOFT_DIRTY | \ 151 _PAGE_DEVMAP | _PAGE_ENC | _PAGE_UFFD_WP) 152 #define _PAGE_CHG_MASK (_COMMON_PAGE_CHG_MASK | _PAGE_PAT) 153 #define _HPAGE_CHG_MASK (_COMMON_PAGE_CHG_MASK | _PAGE_PSE | _PAGE_PAT_LARGE) 154 155 /* 156 * The cache modes defined here are used to translate between pure SW usage 157 * and the HW defined cache mode bits and/or PAT entries. 158 * 159 * The resulting bits for PWT, PCD and PAT should be chosen in a way 160 * to have the WB mode at index 0 (all bits clear). This is the default 161 * right now and likely would break too much if changed. 162 */ 163 #ifndef __ASSEMBLY__ 164 enum page_cache_mode { 165 _PAGE_CACHE_MODE_WB = 0, 166 _PAGE_CACHE_MODE_WC = 1, 167 _PAGE_CACHE_MODE_UC_MINUS = 2, 168 _PAGE_CACHE_MODE_UC = 3, 169 _PAGE_CACHE_MODE_WT = 4, 170 _PAGE_CACHE_MODE_WP = 5, 171 172 _PAGE_CACHE_MODE_NUM = 8 173 }; 174 #endif 175 176 #define _PAGE_ENC (_AT(pteval_t, sme_me_mask)) 177 178 #define _PAGE_CACHE_MASK (_PAGE_PWT | _PAGE_PCD | _PAGE_PAT) 179 #define _PAGE_LARGE_CACHE_MASK (_PAGE_PWT | _PAGE_PCD | _PAGE_PAT_LARGE) 180 181 #define _PAGE_NOCACHE (cachemode2protval(_PAGE_CACHE_MODE_UC)) 182 #define _PAGE_CACHE_WP (cachemode2protval(_PAGE_CACHE_MODE_WP)) 183 184 #define __PP _PAGE_PRESENT 185 #define __RW _PAGE_RW 186 #define _USR _PAGE_USER 187 #define ___A _PAGE_ACCESSED 188 #define ___D _PAGE_DIRTY 189 #define ___G _PAGE_GLOBAL 190 #define __NX _PAGE_NX 191 192 #define _ENC _PAGE_ENC 193 #define __WP _PAGE_CACHE_WP 194 #define __NC _PAGE_NOCACHE 195 #define _PSE _PAGE_PSE 196 197 #define pgprot_val(x) ((x).pgprot) 198 #define __pgprot(x) ((pgprot_t) { (x) } ) 199 #define __pg(x) __pgprot(x) 200 201 #define PAGE_NONE __pg( 0| 0| 0|___A| 0| 0| 0|___G) 202 #define PAGE_SHARED __pg(__PP|__RW|_USR|___A|__NX| 0| 0| 0) 203 #define PAGE_SHARED_EXEC __pg(__PP|__RW|_USR|___A| 0| 0| 0| 0) 204 #define PAGE_COPY_NOEXEC __pg(__PP| 0|_USR|___A|__NX| 0| 0| 0) 205 #define PAGE_COPY_EXEC __pg(__PP| 0|_USR|___A| 0| 0| 0| 0) 206 #define PAGE_COPY __pg(__PP| 0|_USR|___A|__NX| 0| 0| 0) 207 #define PAGE_READONLY __pg(__PP| 0|_USR|___A|__NX| 0| 0| 0) 208 #define PAGE_READONLY_EXEC __pg(__PP| 0|_USR|___A| 0| 0| 0| 0) 209 210 #define __PAGE_KERNEL (__PP|__RW| 0|___A|__NX|___D| 0|___G) 211 #define __PAGE_KERNEL_EXEC (__PP|__RW| 0|___A| 0|___D| 0|___G) 212 213 /* 214 * Page tables needs to have Write=1 in order for any lower PTEs to be 215 * writable. This includes shadow stack memory (Write=0, Dirty=1) 216 */ 217 #define _KERNPG_TABLE_NOENC (__PP|__RW| 0|___A| 0|___D| 0| 0) 218 #define _KERNPG_TABLE (__PP|__RW| 0|___A| 0|___D| 0| 0| _ENC) 219 #define _PAGE_TABLE_NOENC (__PP|__RW|_USR|___A| 0|___D| 0| 0) 220 #define _PAGE_TABLE (__PP|__RW|_USR|___A| 0|___D| 0| 0| _ENC) 221 222 #define __PAGE_KERNEL_RO (__PP| 0| 0|___A|__NX| 0| 0|___G) 223 #define __PAGE_KERNEL_ROX (__PP| 0| 0|___A| 0| 0| 0|___G) 224 #define __PAGE_KERNEL (__PP|__RW| 0|___A|__NX|___D| 0|___G) 225 #define __PAGE_KERNEL_EXEC (__PP|__RW| 0|___A| 0|___D| 0|___G) 226 #define __PAGE_KERNEL_NOCACHE (__PP|__RW| 0|___A|__NX|___D| 0|___G| __NC) 227 #define __PAGE_KERNEL_VVAR (__PP| 0|_USR|___A|__NX| 0| 0|___G) 228 #define __PAGE_KERNEL_LARGE (__PP|__RW| 0|___A|__NX|___D|_PSE|___G) 229 #define __PAGE_KERNEL_LARGE_EXEC (__PP|__RW| 0|___A| 0|___D|_PSE|___G) 230 #define __PAGE_KERNEL_WP (__PP|__RW| 0|___A|__NX|___D| 0|___G| __WP) 231 232 233 #define __PAGE_KERNEL_IO __PAGE_KERNEL 234 #define __PAGE_KERNEL_IO_NOCACHE __PAGE_KERNEL_NOCACHE 235 236 237 #ifndef __ASSEMBLY__ 238 239 #define __PAGE_KERNEL_ENC (__PAGE_KERNEL | _ENC) 240 #define __PAGE_KERNEL_ENC_WP (__PAGE_KERNEL_WP | _ENC) 241 #define __PAGE_KERNEL_NOENC (__PAGE_KERNEL | 0) 242 #define __PAGE_KERNEL_NOENC_WP (__PAGE_KERNEL_WP | 0) 243 244 #define __pgprot_mask(x) __pgprot((x) & __default_kernel_pte_mask) 245 246 #define PAGE_KERNEL __pgprot_mask(__PAGE_KERNEL | _ENC) 247 #define PAGE_KERNEL_NOENC __pgprot_mask(__PAGE_KERNEL | 0) 248 #define PAGE_KERNEL_RO __pgprot_mask(__PAGE_KERNEL_RO | _ENC) 249 #define PAGE_KERNEL_EXEC __pgprot_mask(__PAGE_KERNEL_EXEC | _ENC) 250 #define PAGE_KERNEL_EXEC_NOENC __pgprot_mask(__PAGE_KERNEL_EXEC | 0) 251 #define PAGE_KERNEL_ROX __pgprot_mask(__PAGE_KERNEL_ROX | _ENC) 252 #define PAGE_KERNEL_NOCACHE __pgprot_mask(__PAGE_KERNEL_NOCACHE | _ENC) 253 #define PAGE_KERNEL_LARGE __pgprot_mask(__PAGE_KERNEL_LARGE | _ENC) 254 #define PAGE_KERNEL_LARGE_EXEC __pgprot_mask(__PAGE_KERNEL_LARGE_EXEC | _ENC) 255 #define PAGE_KERNEL_VVAR __pgprot_mask(__PAGE_KERNEL_VVAR | _ENC) 256 257 #define PAGE_KERNEL_IO __pgprot_mask(__PAGE_KERNEL_IO) 258 #define PAGE_KERNEL_IO_NOCACHE __pgprot_mask(__PAGE_KERNEL_IO_NOCACHE) 259 260 #endif /* __ASSEMBLY__ */ 261 262 /* 263 * early identity mapping pte attrib macros. 264 */ 265 #ifdef CONFIG_X86_64 266 #define __PAGE_KERNEL_IDENT_LARGE_EXEC __PAGE_KERNEL_LARGE_EXEC 267 #else 268 #define PTE_IDENT_ATTR 0x003 /* PRESENT+RW */ 269 #define PDE_IDENT_ATTR 0x063 /* PRESENT+RW+DIRTY+ACCESSED */ 270 #define PGD_IDENT_ATTR 0x001 /* PRESENT (no other attributes) */ 271 #endif 272 273 #ifdef CONFIG_X86_32 274 # include <asm/pgtable_32_types.h> 275 #else 276 # include <asm/pgtable_64_types.h> 277 #endif 278 279 #ifndef __ASSEMBLY__ 280 281 #include <linux/types.h> 282 283 /* Extracts the PFN from a (pte|pmd|pud|pgd)val_t of a 4KB page */ 284 #define PTE_PFN_MASK ((pteval_t)PHYSICAL_PAGE_MASK) 285 286 /* 287 * Extracts the flags from a (pte|pmd|pud|pgd)val_t 288 * This includes the protection key value. 289 */ 290 #define PTE_FLAGS_MASK (~PTE_PFN_MASK) 291 292 typedef struct pgprot { pgprotval_t pgprot; } pgprot_t; 293 294 typedef struct { pgdval_t pgd; } pgd_t; 295 296 static inline pgprot_t pgprot_nx(pgprot_t prot) 297 { 298 return __pgprot(pgprot_val(prot) | _PAGE_NX); 299 } 300 #define pgprot_nx pgprot_nx 301 302 #ifdef CONFIG_X86_PAE 303 304 /* 305 * PHYSICAL_PAGE_MASK might be non-constant when SME is compiled in, so we can't 306 * use it here. 307 */ 308 309 #define PGD_PAE_PAGE_MASK ((signed long)PAGE_MASK) 310 #define PGD_PAE_PHYS_MASK (((1ULL << __PHYSICAL_MASK_SHIFT)-1) & PGD_PAE_PAGE_MASK) 311 312 /* 313 * PAE allows Base Address, P, PWT, PCD and AVL bits to be set in PGD entries. 314 * All other bits are Reserved MBZ 315 */ 316 #define PGD_ALLOWED_BITS (PGD_PAE_PHYS_MASK | _PAGE_PRESENT | \ 317 _PAGE_PWT | _PAGE_PCD | \ 318 _PAGE_SOFTW1 | _PAGE_SOFTW2 | _PAGE_SOFTW3) 319 320 #else 321 /* No need to mask any bits for !PAE */ 322 #define PGD_ALLOWED_BITS (~0ULL) 323 #endif 324 325 static inline pgd_t native_make_pgd(pgdval_t val) 326 { 327 return (pgd_t) { val & PGD_ALLOWED_BITS }; 328 } 329 330 static inline pgdval_t native_pgd_val(pgd_t pgd) 331 { 332 return pgd.pgd & PGD_ALLOWED_BITS; 333 } 334 335 static inline pgdval_t pgd_flags(pgd_t pgd) 336 { 337 return native_pgd_val(pgd) & PTE_FLAGS_MASK; 338 } 339 340 #if CONFIG_PGTABLE_LEVELS > 4 341 typedef struct { p4dval_t p4d; } p4d_t; 342 343 static inline p4d_t native_make_p4d(pudval_t val) 344 { 345 return (p4d_t) { val }; 346 } 347 348 static inline p4dval_t native_p4d_val(p4d_t p4d) 349 { 350 return p4d.p4d; 351 } 352 #else 353 #include <asm-generic/pgtable-nop4d.h> 354 355 static inline p4d_t native_make_p4d(pudval_t val) 356 { 357 return (p4d_t) { .pgd = native_make_pgd((pgdval_t)val) }; 358 } 359 360 static inline p4dval_t native_p4d_val(p4d_t p4d) 361 { 362 return native_pgd_val(p4d.pgd); 363 } 364 #endif 365 366 #if CONFIG_PGTABLE_LEVELS > 3 367 typedef struct { pudval_t pud; } pud_t; 368 369 static inline pud_t native_make_pud(pmdval_t val) 370 { 371 return (pud_t) { val }; 372 } 373 374 static inline pudval_t native_pud_val(pud_t pud) 375 { 376 return pud.pud; 377 } 378 #else 379 #include <asm-generic/pgtable-nopud.h> 380 381 static inline pud_t native_make_pud(pudval_t val) 382 { 383 return (pud_t) { .p4d.pgd = native_make_pgd(val) }; 384 } 385 386 static inline pudval_t native_pud_val(pud_t pud) 387 { 388 return native_pgd_val(pud.p4d.pgd); 389 } 390 #endif 391 392 #if CONFIG_PGTABLE_LEVELS > 2 393 static inline pmd_t native_make_pmd(pmdval_t val) 394 { 395 return (pmd_t) { .pmd = val }; 396 } 397 398 static inline pmdval_t native_pmd_val(pmd_t pmd) 399 { 400 return pmd.pmd; 401 } 402 #else 403 #include <asm-generic/pgtable-nopmd.h> 404 405 static inline pmd_t native_make_pmd(pmdval_t val) 406 { 407 return (pmd_t) { .pud.p4d.pgd = native_make_pgd(val) }; 408 } 409 410 static inline pmdval_t native_pmd_val(pmd_t pmd) 411 { 412 return native_pgd_val(pmd.pud.p4d.pgd); 413 } 414 #endif 415 416 static inline p4dval_t p4d_pfn_mask(p4d_t p4d) 417 { 418 /* No 512 GiB huge pages yet */ 419 return PTE_PFN_MASK; 420 } 421 422 static inline p4dval_t p4d_flags_mask(p4d_t p4d) 423 { 424 return ~p4d_pfn_mask(p4d); 425 } 426 427 static inline p4dval_t p4d_flags(p4d_t p4d) 428 { 429 return native_p4d_val(p4d) & p4d_flags_mask(p4d); 430 } 431 432 static inline pudval_t pud_pfn_mask(pud_t pud) 433 { 434 if (native_pud_val(pud) & _PAGE_PSE) 435 return PHYSICAL_PUD_PAGE_MASK; 436 else 437 return PTE_PFN_MASK; 438 } 439 440 static inline pudval_t pud_flags_mask(pud_t pud) 441 { 442 return ~pud_pfn_mask(pud); 443 } 444 445 static inline pudval_t pud_flags(pud_t pud) 446 { 447 return native_pud_val(pud) & pud_flags_mask(pud); 448 } 449 450 static inline pmdval_t pmd_pfn_mask(pmd_t pmd) 451 { 452 if (native_pmd_val(pmd) & _PAGE_PSE) 453 return PHYSICAL_PMD_PAGE_MASK; 454 else 455 return PTE_PFN_MASK; 456 } 457 458 static inline pmdval_t pmd_flags_mask(pmd_t pmd) 459 { 460 return ~pmd_pfn_mask(pmd); 461 } 462 463 static inline pmdval_t pmd_flags(pmd_t pmd) 464 { 465 return native_pmd_val(pmd) & pmd_flags_mask(pmd); 466 } 467 468 static inline pte_t native_make_pte(pteval_t val) 469 { 470 return (pte_t) { .pte = val }; 471 } 472 473 static inline pteval_t native_pte_val(pte_t pte) 474 { 475 return pte.pte; 476 } 477 478 static inline pteval_t pte_flags(pte_t pte) 479 { 480 return native_pte_val(pte) & PTE_FLAGS_MASK; 481 } 482 483 #define __pte2cm_idx(cb) \ 484 ((((cb) >> (_PAGE_BIT_PAT - 2)) & 4) | \ 485 (((cb) >> (_PAGE_BIT_PCD - 1)) & 2) | \ 486 (((cb) >> _PAGE_BIT_PWT) & 1)) 487 #define __cm_idx2pte(i) \ 488 ((((i) & 4) << (_PAGE_BIT_PAT - 2)) | \ 489 (((i) & 2) << (_PAGE_BIT_PCD - 1)) | \ 490 (((i) & 1) << _PAGE_BIT_PWT)) 491 492 unsigned long cachemode2protval(enum page_cache_mode pcm); 493 494 static inline pgprotval_t protval_4k_2_large(pgprotval_t val) 495 { 496 return (val & ~(_PAGE_PAT | _PAGE_PAT_LARGE)) | 497 ((val & _PAGE_PAT) << (_PAGE_BIT_PAT_LARGE - _PAGE_BIT_PAT)); 498 } 499 static inline pgprot_t pgprot_4k_2_large(pgprot_t pgprot) 500 { 501 return __pgprot(protval_4k_2_large(pgprot_val(pgprot))); 502 } 503 static inline pgprotval_t protval_large_2_4k(pgprotval_t val) 504 { 505 return (val & ~(_PAGE_PAT | _PAGE_PAT_LARGE)) | 506 ((val & _PAGE_PAT_LARGE) >> 507 (_PAGE_BIT_PAT_LARGE - _PAGE_BIT_PAT)); 508 } 509 static inline pgprot_t pgprot_large_2_4k(pgprot_t pgprot) 510 { 511 return __pgprot(protval_large_2_4k(pgprot_val(pgprot))); 512 } 513 514 515 typedef struct page *pgtable_t; 516 517 extern pteval_t __supported_pte_mask; 518 extern pteval_t __default_kernel_pte_mask; 519 extern void set_nx(void); 520 extern int nx_enabled; 521 522 #define pgprot_writecombine pgprot_writecombine 523 extern pgprot_t pgprot_writecombine(pgprot_t prot); 524 525 #define pgprot_writethrough pgprot_writethrough 526 extern pgprot_t pgprot_writethrough(pgprot_t prot); 527 528 /* Indicate that x86 has its own track and untrack pfn vma functions */ 529 #define __HAVE_PFNMAP_TRACKING 530 531 #define __HAVE_PHYS_MEM_ACCESS_PROT 532 struct file; 533 pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn, 534 unsigned long size, pgprot_t vma_prot); 535 536 /* Install a pte for a particular vaddr in kernel space. */ 537 void set_pte_vaddr(unsigned long vaddr, pte_t pte); 538 539 #ifdef CONFIG_X86_32 540 extern void native_pagetable_init(void); 541 #else 542 #define native_pagetable_init paging_init 543 #endif 544 545 enum pg_level { 546 PG_LEVEL_NONE, 547 PG_LEVEL_4K, 548 PG_LEVEL_2M, 549 PG_LEVEL_1G, 550 PG_LEVEL_512G, 551 PG_LEVEL_NUM 552 }; 553 554 #ifdef CONFIG_PROC_FS 555 extern void update_page_count(int level, unsigned long pages); 556 #else 557 static inline void update_page_count(int level, unsigned long pages) { } 558 #endif 559 560 /* 561 * Helper function that returns the kernel pagetable entry controlling 562 * the virtual address 'address'. NULL means no pagetable entry present. 563 * NOTE: the return type is pte_t but if the pmd is PSE then we return it 564 * as a pte too. 565 */ 566 extern pte_t *lookup_address(unsigned long address, unsigned int *level); 567 extern pte_t *lookup_address_in_pgd(pgd_t *pgd, unsigned long address, 568 unsigned int *level); 569 extern pmd_t *lookup_pmd_address(unsigned long address); 570 extern phys_addr_t slow_virt_to_phys(void *__address); 571 extern int __init kernel_map_pages_in_pgd(pgd_t *pgd, u64 pfn, 572 unsigned long address, 573 unsigned numpages, 574 unsigned long page_flags); 575 extern int __init kernel_unmap_pages_in_pgd(pgd_t *pgd, unsigned long address, 576 unsigned long numpages); 577 #endif /* !__ASSEMBLY__ */ 578 579 #endif /* _ASM_X86_PGTABLE_DEFS_H */ 580