arch/x86/include/asm/pgtable_types.h

   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 FIRST_USER_ADDRESS      0UL
  11
  12 #define _PAGE_BIT_PRESENT       0       /* is present */
  13 #define _PAGE_BIT_RW            1       /* writeable */
  14 #define _PAGE_BIT_USER          2       /* userspace addressable */
  15 #define _PAGE_BIT_PWT           3       /* page write through */
  16 #define _PAGE_BIT_PCD           4       /* page cache disabled */
  17 #define _PAGE_BIT_ACCESSED      5       /* was accessed (raised by CPU) */
  18 #define _PAGE_BIT_DIRTY         6       /* was written to (raised by CPU) */
  19 #define _PAGE_BIT_PSE           7       /* 4 MB (or 2MB) page */
  20 #define _PAGE_BIT_PAT           7       /* on 4KB pages */
  21 #define _PAGE_BIT_GLOBAL        8       /* Global TLB entry PPro+ */
  22 #define _PAGE_BIT_SOFTW1        9       /* available for programmer */
  23 #define _PAGE_BIT_SOFTW2        10      /* " */
  24 #define _PAGE_BIT_SOFTW3        11      /* " */
  25 #define _PAGE_BIT_PAT_LARGE     12      /* On 2MB or 1GB pages */
  26 #define _PAGE_BIT_SOFTW4        58      /* available for programmer */
  27 #define _PAGE_BIT_PKEY_BIT0     59      /* Protection Keys, bit 1/4 */
  28 #define _PAGE_BIT_PKEY_BIT1     60      /* Protection Keys, bit 2/4 */
  29 #define _PAGE_BIT_PKEY_BIT2     61      /* Protection Keys, bit 3/4 */
  30 #define _PAGE_BIT_PKEY_BIT3     62      /* Protection Keys, bit 4/4 */
  31 #define _PAGE_BIT_NX            63      /* No execute: only valid after cpuid check */
  32
  33 #define _PAGE_BIT_SPECIAL       _PAGE_BIT_SOFTW1
  34 #define _PAGE_BIT_CPA_TEST      _PAGE_BIT_SOFTW1
  35 #define _PAGE_BIT_HIDDEN        _PAGE_BIT_SOFTW3 /* hidden by kmemcheck */
  36 #define _PAGE_BIT_SOFT_DIRTY    _PAGE_BIT_SOFTW3 /* software dirty tracking */
  37 #define _PAGE_BIT_DEVMAP        _PAGE_BIT_SOFTW4
  38
  39 /* If _PAGE_BIT_PRESENT is clear, we use these: */
  40 /* - if the user mapped it with PROT_NONE; pte_present gives true */
  41 #define _PAGE_BIT_PROTNONE      _PAGE_BIT_GLOBAL
  42
  43 #define _PAGE_PRESENT   (_AT(pteval_t, 1) << _PAGE_BIT_PRESENT)
  44 #define _PAGE_RW        (_AT(pteval_t, 1) << _PAGE_BIT_RW)
  45 #define _PAGE_USER      (_AT(pteval_t, 1) << _PAGE_BIT_USER)
  46 #define _PAGE_PWT       (_AT(pteval_t, 1) << _PAGE_BIT_PWT)
  47 #define _PAGE_PCD       (_AT(pteval_t, 1) << _PAGE_BIT_PCD)
  48 #define _PAGE_ACCESSED  (_AT(pteval_t, 1) << _PAGE_BIT_ACCESSED)
  49 #define _PAGE_DIRTY     (_AT(pteval_t, 1) << _PAGE_BIT_DIRTY)
  50 #define _PAGE_PSE       (_AT(pteval_t, 1) << _PAGE_BIT_PSE)
  51 #define _PAGE_GLOBAL    (_AT(pteval_t, 1) << _PAGE_BIT_GLOBAL)
  52 #define _PAGE_SOFTW1    (_AT(pteval_t, 1) << _PAGE_BIT_SOFTW1)
  53 #define _PAGE_SOFTW2    (_AT(pteval_t, 1) << _PAGE_BIT_SOFTW2)
  54 #define _PAGE_PAT       (_AT(pteval_t, 1) << _PAGE_BIT_PAT)
  55 #define _PAGE_PAT_LARGE (_AT(pteval_t, 1) << _PAGE_BIT_PAT_LARGE)
  56 #define _PAGE_SPECIAL   (_AT(pteval_t, 1) << _PAGE_BIT_SPECIAL)
  57 #define _PAGE_CPA_TEST  (_AT(pteval_t, 1) << _PAGE_BIT_CPA_TEST)
  58 #ifdef CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS
  59 #define _PAGE_PKEY_BIT0 (_AT(pteval_t, 1) << _PAGE_BIT_PKEY_BIT0)
  60 #define _PAGE_PKEY_BIT1 (_AT(pteval_t, 1) << _PAGE_BIT_PKEY_BIT1)
  61 #define _PAGE_PKEY_BIT2 (_AT(pteval_t, 1) << _PAGE_BIT_PKEY_BIT2)
  62 #define _PAGE_PKEY_BIT3 (_AT(pteval_t, 1) << _PAGE_BIT_PKEY_BIT3)
  63 #else
  64 #define _PAGE_PKEY_BIT0 (_AT(pteval_t, 0))
  65 #define _PAGE_PKEY_BIT1 (_AT(pteval_t, 0))
  66 #define _PAGE_PKEY_BIT2 (_AT(pteval_t, 0))
  67 #define _PAGE_PKEY_BIT3 (_AT(pteval_t, 0))
  68 #endif
  69 #define __HAVE_ARCH_PTE_SPECIAL
  70
  71 #define _PAGE_PKEY_MASK (_PAGE_PKEY_BIT0 | \
  72                          _PAGE_PKEY_BIT1 | \
  73                          _PAGE_PKEY_BIT2 | \
  74                          _PAGE_PKEY_BIT3)
  75
  76 #if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
  77 #define _PAGE_KNL_ERRATUM_MASK (_PAGE_DIRTY | _PAGE_ACCESSED)
  78 #else
  79 #define _PAGE_KNL_ERRATUM_MASK 0
  80 #endif
  81
  82 #ifdef CONFIG_KMEMCHECK
  83 #define _PAGE_HIDDEN    (_AT(pteval_t, 1) << _PAGE_BIT_HIDDEN)
  84 #else
  85 #define _PAGE_HIDDEN    (_AT(pteval_t, 0))
  86 #endif
  87
  88 /*
  89  * The same hidden bit is used by kmemcheck, but since kmemcheck
  90  * works on kernel pages while soft-dirty engine on user space,
  91  * they do not conflict with each other.
  92  */
  93
  94 #ifdef CONFIG_MEM_SOFT_DIRTY
  95 #define _PAGE_SOFT_DIRTY        (_AT(pteval_t, 1) << _PAGE_BIT_SOFT_DIRTY)
  96 #else
  97 #define _PAGE_SOFT_DIRTY        (_AT(pteval_t, 0))
  98 #endif
  99
 100 /*
 101  * Tracking soft dirty bit when a page goes to a swap is tricky.
 102  * We need a bit which can be stored in pte _and_ not conflict
 103  * with swap entry format. On x86 bits 1-4 are *not* involved
 104  * into swap entry computation, but bit 7 is used for thp migration,
 105  * so we borrow bit 1 for soft dirty tracking.
 106  *
 107  * Please note that this bit must be treated as swap dirty page
 108  * mark if and only if the PTE/PMD has present bit clear!
 109  */
 110 #ifdef CONFIG_MEM_SOFT_DIRTY
 111 #define _PAGE_SWP_SOFT_DIRTY    _PAGE_RW
 112 #else
 113 #define _PAGE_SWP_SOFT_DIRTY    (_AT(pteval_t, 0))
 114 #endif
 115
 116 #if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
 117 #define _PAGE_NX        (_AT(pteval_t, 1) << _PAGE_BIT_NX)
 118 #define _PAGE_DEVMAP    (_AT(u64, 1) << _PAGE_BIT_DEVMAP)
 119 #define __HAVE_ARCH_PTE_DEVMAP
 120 #else
 121 #define _PAGE_NX        (_AT(pteval_t, 0))
 122 #define _PAGE_DEVMAP    (_AT(pteval_t, 0))
 123 #endif
 124
 125 #define _PAGE_PROTNONE  (_AT(pteval_t, 1) << _PAGE_BIT_PROTNONE)
 126
 127 #define _PAGE_TABLE_NOENC       (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER |\
 128                                  _PAGE_ACCESSED | _PAGE_DIRTY)
 129 #define _KERNPG_TABLE_NOENC     (_PAGE_PRESENT | _PAGE_RW |             \
 130                                  _PAGE_ACCESSED | _PAGE_DIRTY)
 131
 132 /*
 133  * Set of bits not changed in pte_modify.  The pte's
 134  * protection key is treated like _PAGE_RW, for
 135  * instance, and is *not* included in this mask since
 136  * pte_modify() does modify it.
 137  */
 138 #define _PAGE_CHG_MASK  (PTE_PFN_MASK | _PAGE_PCD | _PAGE_PWT |         \
 139                          _PAGE_SPECIAL | _PAGE_ACCESSED | _PAGE_DIRTY | \
 140                          _PAGE_SOFT_DIRTY)
 141 #define _HPAGE_CHG_MASK (_PAGE_CHG_MASK | _PAGE_PSE)
 142
 143 /*
 144  * The cache modes defined here are used to translate between pure SW usage
 145  * and the HW defined cache mode bits and/or PAT entries.
 146  *
 147  * The resulting bits for PWT, PCD and PAT should be chosen in a way
 148  * to have the WB mode at index 0 (all bits clear). This is the default
 149  * right now and likely would break too much if changed.
 150  */
 151 #ifndef __ASSEMBLY__
 152 enum page_cache_mode {
 153         _PAGE_CACHE_MODE_WB = 0,
 154         _PAGE_CACHE_MODE_WC = 1,
 155         _PAGE_CACHE_MODE_UC_MINUS = 2,
 156         _PAGE_CACHE_MODE_UC = 3,
 157         _PAGE_CACHE_MODE_WT = 4,
 158         _PAGE_CACHE_MODE_WP = 5,
 159         _PAGE_CACHE_MODE_NUM = 8
 160 };
 161 #endif
 162
 163 #define _PAGE_CACHE_MASK        (_PAGE_PAT | _PAGE_PCD | _PAGE_PWT)
 164 #define _PAGE_NOCACHE           (cachemode2protval(_PAGE_CACHE_MODE_UC))
 165 #define _PAGE_CACHE_WP          (cachemode2protval(_PAGE_CACHE_MODE_WP))
 166
 167 #define PAGE_NONE       __pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED)
 168 #define PAGE_SHARED     __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | \
 169                                  _PAGE_ACCESSED | _PAGE_NX)
 170
 171 #define PAGE_SHARED_EXEC        __pgprot(_PAGE_PRESENT | _PAGE_RW |     \
 172                                          _PAGE_USER | _PAGE_ACCESSED)
 173 #define PAGE_COPY_NOEXEC        __pgprot(_PAGE_PRESENT | _PAGE_USER |   \
 174                                          _PAGE_ACCESSED | _PAGE_NX)
 175 #define PAGE_COPY_EXEC          __pgprot(_PAGE_PRESENT | _PAGE_USER |   \
 176                                          _PAGE_ACCESSED)
 177 #define PAGE_COPY               PAGE_COPY_NOEXEC
 178 #define PAGE_READONLY           __pgprot(_PAGE_PRESENT | _PAGE_USER |   \
 179                                          _PAGE_ACCESSED | _PAGE_NX)
 180 #define PAGE_READONLY_EXEC      __pgprot(_PAGE_PRESENT | _PAGE_USER |   \
 181                                          _PAGE_ACCESSED)
 182
 183 #define __PAGE_KERNEL_EXEC                                              \
 184         (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_GLOBAL)
 185 #define __PAGE_KERNEL           (__PAGE_KERNEL_EXEC | _PAGE_NX)
 186
 187 #define __PAGE_KERNEL_RO                (__PAGE_KERNEL & ~_PAGE_RW)
 188 #define __PAGE_KERNEL_RX                (__PAGE_KERNEL_EXEC & ~_PAGE_RW)
 189 #define __PAGE_KERNEL_NOCACHE           (__PAGE_KERNEL | _PAGE_NOCACHE)
 190 #define __PAGE_KERNEL_VSYSCALL          (__PAGE_KERNEL_RX | _PAGE_USER)
 191 #define __PAGE_KERNEL_VVAR              (__PAGE_KERNEL_RO | _PAGE_USER)
 192 #define __PAGE_KERNEL_LARGE             (__PAGE_KERNEL | _PAGE_PSE)
 193 #define __PAGE_KERNEL_LARGE_EXEC        (__PAGE_KERNEL_EXEC | _PAGE_PSE)
 194 #define __PAGE_KERNEL_WP                (__PAGE_KERNEL | _PAGE_CACHE_WP)
 195
 196 #define __PAGE_KERNEL_IO                (__PAGE_KERNEL)
 197 #define __PAGE_KERNEL_IO_NOCACHE        (__PAGE_KERNEL_NOCACHE)
 198
 199 #ifndef __ASSEMBLY__
 200
 201 #define _PAGE_ENC       (_AT(pteval_t, sme_me_mask))
 202
 203 #define _PAGE_TABLE     (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER |        \
 204                          _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_ENC)
 205 #define _KERNPG_TABLE   (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED |    \
 206                          _PAGE_DIRTY | _PAGE_ENC)
 207
 208 #define __PAGE_KERNEL_ENC       (__PAGE_KERNEL | _PAGE_ENC)
 209 #define __PAGE_KERNEL_ENC_WP    (__PAGE_KERNEL_WP | _PAGE_ENC)
 210
 211 #define __PAGE_KERNEL_NOENC     (__PAGE_KERNEL)
 212 #define __PAGE_KERNEL_NOENC_WP  (__PAGE_KERNEL_WP)
 213
 214 #define PAGE_KERNEL             __pgprot(__PAGE_KERNEL | _PAGE_ENC)
 215 #define PAGE_KERNEL_NOENC       __pgprot(__PAGE_KERNEL)
 216 #define PAGE_KERNEL_RO          __pgprot(__PAGE_KERNEL_RO | _PAGE_ENC)
 217 #define PAGE_KERNEL_EXEC        __pgprot(__PAGE_KERNEL_EXEC | _PAGE_ENC)
 218 #define PAGE_KERNEL_EXEC_NOENC  __pgprot(__PAGE_KERNEL_EXEC)
 219 #define PAGE_KERNEL_RX          __pgprot(__PAGE_KERNEL_RX | _PAGE_ENC)
 220 #define PAGE_KERNEL_NOCACHE     __pgprot(__PAGE_KERNEL_NOCACHE | _PAGE_ENC)
 221 #define PAGE_KERNEL_LARGE       __pgprot(__PAGE_KERNEL_LARGE | _PAGE_ENC)
 222 #define PAGE_KERNEL_LARGE_EXEC  __pgprot(__PAGE_KERNEL_LARGE_EXEC | _PAGE_ENC)
 223 #define PAGE_KERNEL_VSYSCALL    __pgprot(__PAGE_KERNEL_VSYSCALL | _PAGE_ENC)
 224 #define PAGE_KERNEL_VVAR        __pgprot(__PAGE_KERNEL_VVAR | _PAGE_ENC)
 225
 226 #define PAGE_KERNEL_IO          __pgprot(__PAGE_KERNEL_IO)
 227 #define PAGE_KERNEL_IO_NOCACHE  __pgprot(__PAGE_KERNEL_IO_NOCACHE)
 228
 229 #endif  /* __ASSEMBLY__ */
 230
 231 /*         xwr */
 232 #define __P000  PAGE_NONE
 233 #define __P001  PAGE_READONLY
 234 #define __P010  PAGE_COPY
 235 #define __P011  PAGE_COPY
 236 #define __P100  PAGE_READONLY_EXEC
 237 #define __P101  PAGE_READONLY_EXEC
 238 #define __P110  PAGE_COPY_EXEC
 239 #define __P111  PAGE_COPY_EXEC
 240
 241 #define __S000  PAGE_NONE
 242 #define __S001  PAGE_READONLY
 243 #define __S010  PAGE_SHARED
 244 #define __S011  PAGE_SHARED
 245 #define __S100  PAGE_READONLY_EXEC
 246 #define __S101  PAGE_READONLY_EXEC
 247 #define __S110  PAGE_SHARED_EXEC
 248 #define __S111  PAGE_SHARED_EXEC
 249
 250 /*
 251  * early identity mapping  pte attrib macros.
 252  */
 253 #ifdef CONFIG_X86_64
 254 #define __PAGE_KERNEL_IDENT_LARGE_EXEC  __PAGE_KERNEL_LARGE_EXEC
 255 #else
 256 #define PTE_IDENT_ATTR   0x003          /* PRESENT+RW */
 257 #define PDE_IDENT_ATTR   0x063          /* PRESENT+RW+DIRTY+ACCESSED */
 258 #define PGD_IDENT_ATTR   0x001          /* PRESENT (no other attributes) */
 259 #endif
 260
 261 #ifdef CONFIG_X86_32
 262 # include <asm/pgtable_32_types.h>
 263 #else
 264 # include <asm/pgtable_64_types.h>
 265 #endif
 266
 267 #ifndef __ASSEMBLY__
 268
 269 #include <linux/types.h>
 270
 271 /* Extracts the PFN from a (pte|pmd|pud|pgd)val_t of a 4KB page */
 272 #define PTE_PFN_MASK            ((pteval_t)PHYSICAL_PAGE_MASK)
 273
 274 /*
 275  *  Extracts the flags from a (pte|pmd|pud|pgd)val_t
 276  *  This includes the protection key value.
 277  */
 278 #define PTE_FLAGS_MASK          (~PTE_PFN_MASK)
 279
 280 typedef struct pgprot { pgprotval_t pgprot; } pgprot_t;
 281
 282 typedef struct { pgdval_t pgd; } pgd_t;
 283
 284 static inline pgd_t native_make_pgd(pgdval_t val)
 285 {
 286         return (pgd_t) { val };
 287 }
 288
 289 static inline pgdval_t native_pgd_val(pgd_t pgd)
 290 {
 291         return pgd.pgd;
 292 }
 293
 294 static inline pgdval_t pgd_flags(pgd_t pgd)
 295 {
 296         return native_pgd_val(pgd) & PTE_FLAGS_MASK;
 297 }
 298
 299 #if CONFIG_PGTABLE_LEVELS > 4
 300 typedef struct { p4dval_t p4d; } p4d_t;
 301
 302 static inline p4d_t native_make_p4d(pudval_t val)
 303 {
 304         return (p4d_t) { val };
 305 }
 306
 307 static inline p4dval_t native_p4d_val(p4d_t p4d)
 308 {
 309         return p4d.p4d;
 310 }
 311 #else
 312 #include <asm-generic/pgtable-nop4d.h>
 313
 314 static inline p4d_t native_make_p4d(pudval_t val)
 315 {
 316         return (p4d_t) { .pgd = native_make_pgd((pgdval_t)val) };
 317 }
 318
 319 static inline p4dval_t native_p4d_val(p4d_t p4d)
 320 {
 321         return native_pgd_val(p4d.pgd);
 322 }
 323 #endif
 324
 325 #if CONFIG_PGTABLE_LEVELS > 3
 326 typedef struct { pudval_t pud; } pud_t;
 327
 328 static inline pud_t native_make_pud(pmdval_t val)
 329 {
 330         return (pud_t) { val };
 331 }
 332
 333 static inline pudval_t native_pud_val(pud_t pud)
 334 {
 335         return pud.pud;
 336 }
 337 #else
 338 #include <asm-generic/pgtable-nopud.h>
 339
 340 static inline pudval_t native_pud_val(pud_t pud)
 341 {
 342         return native_pgd_val(pud.p4d.pgd);
 343 }
 344 #endif
 345
 346 #if CONFIG_PGTABLE_LEVELS > 2
 347 typedef struct { pmdval_t pmd; } pmd_t;
 348
 349 static inline pmd_t native_make_pmd(pmdval_t val)
 350 {
 351         return (pmd_t) { val };
 352 }
 353
 354 static inline pmdval_t native_pmd_val(pmd_t pmd)
 355 {
 356         return pmd.pmd;
 357 }
 358 #else
 359 #include <asm-generic/pgtable-nopmd.h>
 360
 361 static inline pmdval_t native_pmd_val(pmd_t pmd)
 362 {
 363         return native_pgd_val(pmd.pud.p4d.pgd);
 364 }
 365 #endif
 366
 367 static inline p4dval_t p4d_pfn_mask(p4d_t p4d)
 368 {
 369         /* No 512 GiB huge pages yet */
 370         return PTE_PFN_MASK;
 371 }
 372
 373 static inline p4dval_t p4d_flags_mask(p4d_t p4d)
 374 {
 375         return ~p4d_pfn_mask(p4d);
 376 }
 377
 378 static inline p4dval_t p4d_flags(p4d_t p4d)
 379 {
 380         return native_p4d_val(p4d) & p4d_flags_mask(p4d);
 381 }
 382
 383 static inline pudval_t pud_pfn_mask(pud_t pud)
 384 {
 385         if (native_pud_val(pud) & _PAGE_PSE)
 386                 return PHYSICAL_PUD_PAGE_MASK;
 387         else
 388                 return PTE_PFN_MASK;
 389 }
 390
 391 static inline pudval_t pud_flags_mask(pud_t pud)
 392 {
 393         return ~pud_pfn_mask(pud);
 394 }
 395
 396 static inline pudval_t pud_flags(pud_t pud)
 397 {
 398         return native_pud_val(pud) & pud_flags_mask(pud);
 399 }
 400
 401 static inline pmdval_t pmd_pfn_mask(pmd_t pmd)
 402 {
 403         if (native_pmd_val(pmd) & _PAGE_PSE)
 404                 return PHYSICAL_PMD_PAGE_MASK;
 405         else
 406                 return PTE_PFN_MASK;
 407 }
 408
 409 static inline pmdval_t pmd_flags_mask(pmd_t pmd)
 410 {
 411         return ~pmd_pfn_mask(pmd);
 412 }
 413
 414 static inline pmdval_t pmd_flags(pmd_t pmd)
 415 {
 416         return native_pmd_val(pmd) & pmd_flags_mask(pmd);
 417 }
 418
 419 static inline pte_t native_make_pte(pteval_t val)
 420 {
 421         return (pte_t) { .pte = val };
 422 }
 423
 424 static inline pteval_t native_pte_val(pte_t pte)
 425 {
 426         return pte.pte;
 427 }
 428
 429 static inline pteval_t pte_flags(pte_t pte)
 430 {
 431         return native_pte_val(pte) & PTE_FLAGS_MASK;
 432 }
 433
 434 #define pgprot_val(x)   ((x).pgprot)
 435 #define __pgprot(x)     ((pgprot_t) { (x) } )
 436
 437 extern uint16_t __cachemode2pte_tbl[_PAGE_CACHE_MODE_NUM];
 438 extern uint8_t __pte2cachemode_tbl[8];
 439
 440 #define __pte2cm_idx(cb)                                \
 441         ((((cb) >> (_PAGE_BIT_PAT - 2)) & 4) |          \
 442          (((cb) >> (_PAGE_BIT_PCD - 1)) & 2) |          \
 443          (((cb) >> _PAGE_BIT_PWT) & 1))
 444 #define __cm_idx2pte(i)                                 \
 445         ((((i) & 4) << (_PAGE_BIT_PAT - 2)) |           \
 446          (((i) & 2) << (_PAGE_BIT_PCD - 1)) |           \
 447          (((i) & 1) << _PAGE_BIT_PWT))
 448
 449 static inline unsigned long cachemode2protval(enum page_cache_mode pcm)
 450 {
 451         if (likely(pcm == 0))
 452                 return 0;
 453         return __cachemode2pte_tbl[pcm];
 454 }
 455 static inline pgprot_t cachemode2pgprot(enum page_cache_mode pcm)
 456 {
 457         return __pgprot(cachemode2protval(pcm));
 458 }
 459 static inline enum page_cache_mode pgprot2cachemode(pgprot_t pgprot)
 460 {
 461         unsigned long masked;
 462
 463         masked = pgprot_val(pgprot) & _PAGE_CACHE_MASK;
 464         if (likely(masked == 0))
 465                 return 0;
 466         return __pte2cachemode_tbl[__pte2cm_idx(masked)];
 467 }
 468 static inline pgprot_t pgprot_4k_2_large(pgprot_t pgprot)
 469 {
 470         pgprotval_t val = pgprot_val(pgprot);
 471         pgprot_t new;
 472
 473         pgprot_val(new) = (val & ~(_PAGE_PAT | _PAGE_PAT_LARGE)) |
 474                 ((val & _PAGE_PAT) << (_PAGE_BIT_PAT_LARGE - _PAGE_BIT_PAT));
 475         return new;
 476 }
 477 static inline pgprot_t pgprot_large_2_4k(pgprot_t pgprot)
 478 {
 479         pgprotval_t val = pgprot_val(pgprot);
 480         pgprot_t new;
 481
 482         pgprot_val(new) = (val & ~(_PAGE_PAT | _PAGE_PAT_LARGE)) |
 483                           ((val & _PAGE_PAT_LARGE) >>
 484                            (_PAGE_BIT_PAT_LARGE - _PAGE_BIT_PAT));
 485         return new;
 486 }
 487
 488
 489 typedef struct page *pgtable_t;
 490
 491 extern pteval_t __supported_pte_mask;
 492 extern void set_nx(void);
 493 extern int nx_enabled;
 494
 495 #define pgprot_writecombine     pgprot_writecombine
 496 extern pgprot_t pgprot_writecombine(pgprot_t prot);
 497
 498 #define pgprot_writethrough     pgprot_writethrough
 499 extern pgprot_t pgprot_writethrough(pgprot_t prot);
 500
 501 /* Indicate that x86 has its own track and untrack pfn vma functions */
 502 #define __HAVE_PFNMAP_TRACKING
 503
 504 #define __HAVE_PHYS_MEM_ACCESS_PROT
 505 struct file;
 506 pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
 507                               unsigned long size, pgprot_t vma_prot);
 508
 509 /* Install a pte for a particular vaddr in kernel space. */
 510 void set_pte_vaddr(unsigned long vaddr, pte_t pte);
 511
 512 #ifdef CONFIG_X86_32
 513 extern void native_pagetable_init(void);
 514 #else
 515 #define native_pagetable_init        paging_init
 516 #endif
 517
 518 struct seq_file;
 519 extern void arch_report_meminfo(struct seq_file *m);
 520
 521 enum pg_level {
 522         PG_LEVEL_NONE,
 523         PG_LEVEL_4K,
 524         PG_LEVEL_2M,
 525         PG_LEVEL_1G,
 526         PG_LEVEL_512G,
 527         PG_LEVEL_NUM
 528 };
 529
 530 #ifdef CONFIG_PROC_FS
 531 extern void update_page_count(int level, unsigned long pages);
 532 #else
 533 static inline void update_page_count(int level, unsigned long pages) { }
 534 #endif
 535
 536 /*
 537  * Helper function that returns the kernel pagetable entry controlling
 538  * the virtual address 'address'. NULL means no pagetable entry present.
 539  * NOTE: the return type is pte_t but if the pmd is PSE then we return it
 540  * as a pte too.
 541  */
 542 extern pte_t *lookup_address(unsigned long address, unsigned int *level);
 543 extern pte_t *lookup_address_in_pgd(pgd_t *pgd, unsigned long address,
 544                                     unsigned int *level);
 545 extern pmd_t *lookup_pmd_address(unsigned long address);
 546 extern phys_addr_t slow_virt_to_phys(void *__address);
 547 extern int kernel_map_pages_in_pgd(pgd_t *pgd, u64 pfn, unsigned long address,
 548                                    unsigned numpages, unsigned long page_flags);
 549 #endif  /* !__ASSEMBLY__ */
 550
 551 #endif /* _ASM_X86_PGTABLE_DEFS_H */