arch/x86/include/asm/pgtable_types.h

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