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_SOFT_DIRTY _PAGE_BIT_SOFTW3 /* software dirty tracking */
36 #define _PAGE_BIT_DEVMAP _PAGE_BIT_SOFTW4
37
38 /* If _PAGE_BIT_PRESENT is clear, we use these: */
39 /* - if the user mapped it with PROT_NONE; pte_present gives true */
40 #define _PAGE_BIT_PROTNONE _PAGE_BIT_GLOBAL
41
42 #define _PAGE_PRESENT (_AT(pteval_t, 1) << _PAGE_BIT_PRESENT)
43 #define _PAGE_RW (_AT(pteval_t, 1) << _PAGE_BIT_RW)
44 #define _PAGE_USER (_AT(pteval_t, 1) << _PAGE_BIT_USER)
45 #define _PAGE_PWT (_AT(pteval_t, 1) << _PAGE_BIT_PWT)
46 #define _PAGE_PCD (_AT(pteval_t, 1) << _PAGE_BIT_PCD)
47 #define _PAGE_ACCESSED (_AT(pteval_t, 1) << _PAGE_BIT_ACCESSED)
48 #define _PAGE_DIRTY (_AT(pteval_t, 1) << _PAGE_BIT_DIRTY)
49 #define _PAGE_PSE (_AT(pteval_t, 1) << _PAGE_BIT_PSE)
50 #define _PAGE_GLOBAL (_AT(pteval_t, 1) << _PAGE_BIT_GLOBAL)
51 #define _PAGE_SOFTW1 (_AT(pteval_t, 1) << _PAGE_BIT_SOFTW1)
52 #define _PAGE_SOFTW2 (_AT(pteval_t, 1) << _PAGE_BIT_SOFTW2)
53 #define _PAGE_SOFTW3 (_AT(pteval_t, 1) << _PAGE_BIT_SOFTW3)
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
70 #define _PAGE_PKEY_MASK (_PAGE_PKEY_BIT0 | \
71 _PAGE_PKEY_BIT1 | \
72 _PAGE_PKEY_BIT2 | \
73 _PAGE_PKEY_BIT3)
74
75 #if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
76 #define _PAGE_KNL_ERRATUM_MASK (_PAGE_DIRTY | _PAGE_ACCESSED)
77 #else
78 #define _PAGE_KNL_ERRATUM_MASK 0
79 #endif
80
81 #ifdef CONFIG_MEM_SOFT_DIRTY
82 #define _PAGE_SOFT_DIRTY (_AT(pteval_t, 1) << _PAGE_BIT_SOFT_DIRTY)
83 #else
84 #define _PAGE_SOFT_DIRTY (_AT(pteval_t, 0))
85 #endif
86
87 /*
88 * Tracking soft dirty bit when a page goes to a swap is tricky.
89 * We need a bit which can be stored in pte _and_ not conflict
90 * with swap entry format. On x86 bits 1-4 are *not* involved
91 * into swap entry computation, but bit 7 is used for thp migration,
92 * so we borrow bit 1 for soft dirty tracking.
93 *
94 * Please note that this bit must be treated as swap dirty page
95 * mark if and only if the PTE/PMD has present bit clear!
96 */
97 #ifdef CONFIG_MEM_SOFT_DIRTY
98 #define _PAGE_SWP_SOFT_DIRTY _PAGE_RW
99 #else
100 #define _PAGE_SWP_SOFT_DIRTY (_AT(pteval_t, 0))
101 #endif
102
103 #if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
104 #define _PAGE_NX (_AT(pteval_t, 1) << _PAGE_BIT_NX)
105 #define _PAGE_DEVMAP (_AT(u64, 1) << _PAGE_BIT_DEVMAP)
106 #else
107 #define _PAGE_NX (_AT(pteval_t, 0))
108 #define _PAGE_DEVMAP (_AT(pteval_t, 0))
109 #endif
110
111 #define _PAGE_PROTNONE (_AT(pteval_t, 1) << _PAGE_BIT_PROTNONE)
112
113 #define _PAGE_TABLE_NOENC (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER |\
114 _PAGE_ACCESSED | _PAGE_DIRTY)
115 #define _KERNPG_TABLE_NOENC (_PAGE_PRESENT | _PAGE_RW | \
116 _PAGE_ACCESSED | _PAGE_DIRTY)
117
118 /*
119 * Set of bits not changed in pte_modify. The pte's
120 * protection key is treated like _PAGE_RW, for
121 * instance, and is *not* included in this mask since
122 * pte_modify() does modify it.
123 */
124 #define _PAGE_CHG_MASK (PTE_PFN_MASK | _PAGE_PCD | _PAGE_PWT | \
125 _PAGE_SPECIAL | _PAGE_ACCESSED | _PAGE_DIRTY | \
126 _PAGE_SOFT_DIRTY | _PAGE_DEVMAP)
127 #define _HPAGE_CHG_MASK (_PAGE_CHG_MASK | _PAGE_PSE)
128
129 /*
130 * The cache modes defined here are used to translate between pure SW usage
131 * and the HW defined cache mode bits and/or PAT entries.
132 *
133 * The resulting bits for PWT, PCD and PAT should be chosen in a way
134 * to have the WB mode at index 0 (all bits clear). This is the default
135 * right now and likely would break too much if changed.
136 */
137 #ifndef __ASSEMBLY__
138 enum page_cache_mode {
139 _PAGE_CACHE_MODE_WB = 0,
140 _PAGE_CACHE_MODE_WC = 1,
141 _PAGE_CACHE_MODE_UC_MINUS = 2,
142 _PAGE_CACHE_MODE_UC = 3,
143 _PAGE_CACHE_MODE_WT = 4,
144 _PAGE_CACHE_MODE_WP = 5,
145 _PAGE_CACHE_MODE_NUM = 8
146 };
147 #endif
148
149 #define _PAGE_CACHE_MASK (_PAGE_PAT | _PAGE_PCD | _PAGE_PWT)
150 #define _PAGE_NOCACHE (cachemode2protval(_PAGE_CACHE_MODE_UC))
151 #define _PAGE_CACHE_WP (cachemode2protval(_PAGE_CACHE_MODE_WP))
152
153 #define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED)
154 #define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | \
155 _PAGE_ACCESSED | _PAGE_NX)
156
157 #define PAGE_SHARED_EXEC __pgprot(_PAGE_PRESENT | _PAGE_RW | \
158 _PAGE_USER | _PAGE_ACCESSED)
159 #define PAGE_COPY_NOEXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \
160 _PAGE_ACCESSED | _PAGE_NX)
161 #define PAGE_COPY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \
162 _PAGE_ACCESSED)
163 #define PAGE_COPY PAGE_COPY_NOEXEC
164 #define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | \
165 _PAGE_ACCESSED | _PAGE_NX)
166 #define PAGE_READONLY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \
167 _PAGE_ACCESSED)
168
169 #define __PAGE_KERNEL_EXEC \
170 (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_GLOBAL)
171 #define __PAGE_KERNEL (__PAGE_KERNEL_EXEC | _PAGE_NX)
172
173 #define __PAGE_KERNEL_RO (__PAGE_KERNEL & ~_PAGE_RW)
174 #define __PAGE_KERNEL_RX (__PAGE_KERNEL_EXEC & ~_PAGE_RW)
175 #define __PAGE_KERNEL_NOCACHE (__PAGE_KERNEL | _PAGE_NOCACHE)
176 #define __PAGE_KERNEL_VVAR (__PAGE_KERNEL_RO | _PAGE_USER)
177 #define __PAGE_KERNEL_LARGE (__PAGE_KERNEL | _PAGE_PSE)
178 #define __PAGE_KERNEL_LARGE_EXEC (__PAGE_KERNEL_EXEC | _PAGE_PSE)
179 #define __PAGE_KERNEL_WP (__PAGE_KERNEL | _PAGE_CACHE_WP)
180
181 #define __PAGE_KERNEL_IO (__PAGE_KERNEL)
182 #define __PAGE_KERNEL_IO_NOCACHE (__PAGE_KERNEL_NOCACHE)
183
184 #ifndef __ASSEMBLY__
185
186 #define _PAGE_ENC (_AT(pteval_t, sme_me_mask))
187
188 #define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | \
189 _PAGE_DIRTY | _PAGE_ENC)
190 #define _PAGE_TABLE (_KERNPG_TABLE | _PAGE_USER)
191
192 #define __PAGE_KERNEL_ENC (__PAGE_KERNEL | _PAGE_ENC)
193 #define __PAGE_KERNEL_ENC_WP (__PAGE_KERNEL_WP | _PAGE_ENC)
194
195 #define __PAGE_KERNEL_NOENC (__PAGE_KERNEL)
196 #define __PAGE_KERNEL_NOENC_WP (__PAGE_KERNEL_WP)
197
198 #define default_pgprot(x) __pgprot((x) & __default_kernel_pte_mask)
199
200 #define PAGE_KERNEL default_pgprot(__PAGE_KERNEL | _PAGE_ENC)
201 #define PAGE_KERNEL_NOENC default_pgprot(__PAGE_KERNEL)
202 #define PAGE_KERNEL_RO default_pgprot(__PAGE_KERNEL_RO | _PAGE_ENC)
203 #define PAGE_KERNEL_EXEC default_pgprot(__PAGE_KERNEL_EXEC | _PAGE_ENC)
204 #define PAGE_KERNEL_EXEC_NOENC default_pgprot(__PAGE_KERNEL_EXEC)
205 #define PAGE_KERNEL_RX default_pgprot(__PAGE_KERNEL_RX | _PAGE_ENC)
206 #define PAGE_KERNEL_NOCACHE default_pgprot(__PAGE_KERNEL_NOCACHE | _PAGE_ENC)
207 #define PAGE_KERNEL_LARGE default_pgprot(__PAGE_KERNEL_LARGE | _PAGE_ENC)
208 #define PAGE_KERNEL_LARGE_EXEC default_pgprot(__PAGE_KERNEL_LARGE_EXEC | _PAGE_ENC)
209 #define PAGE_KERNEL_VVAR default_pgprot(__PAGE_KERNEL_VVAR | _PAGE_ENC)
210
211 #define PAGE_KERNEL_IO default_pgprot(__PAGE_KERNEL_IO)
212 #define PAGE_KERNEL_IO_NOCACHE default_pgprot(__PAGE_KERNEL_IO_NOCACHE)
213
214 #endif /* __ASSEMBLY__ */
215
216 /* xwr */
217 #define __P000 PAGE_NONE
218 #define __P001 PAGE_READONLY
219 #define __P010 PAGE_COPY
220 #define __P011 PAGE_COPY
221 #define __P100 PAGE_READONLY_EXEC
222 #define __P101 PAGE_READONLY_EXEC
223 #define __P110 PAGE_COPY_EXEC
224 #define __P111 PAGE_COPY_EXEC
225
226 #define __S000 PAGE_NONE
227 #define __S001 PAGE_READONLY
228 #define __S010 PAGE_SHARED
229 #define __S011 PAGE_SHARED
230 #define __S100 PAGE_READONLY_EXEC
231 #define __S101 PAGE_READONLY_EXEC
232 #define __S110 PAGE_SHARED_EXEC
233 #define __S111 PAGE_SHARED_EXEC
234
235 /*
236 * early identity mapping pte attrib macros.
237 */
238 #ifdef CONFIG_X86_64
239 #define __PAGE_KERNEL_IDENT_LARGE_EXEC __PAGE_KERNEL_LARGE_EXEC
240 #else
241 #define PTE_IDENT_ATTR 0x003 /* PRESENT+RW */
242 #define PDE_IDENT_ATTR 0x063 /* PRESENT+RW+DIRTY+ACCESSED */
243 #define PGD_IDENT_ATTR 0x001 /* PRESENT (no other attributes) */
244 #endif
245
246 #ifdef CONFIG_X86_32
247 # include <asm/pgtable_32_types.h>
248 #else
249 # include <asm/pgtable_64_types.h>
250 #endif
251
252 #ifndef __ASSEMBLY__
253
254 #include <linux/types.h>
255
256 /* Extracts the PFN from a (pte|pmd|pud|pgd)val_t of a 4KB page */
257 #define PTE_PFN_MASK ((pteval_t)PHYSICAL_PAGE_MASK)
258
259 /*
260 * Extracts the flags from a (pte|pmd|pud|pgd)val_t
261 * This includes the protection key value.
262 */
263 #define PTE_FLAGS_MASK (~PTE_PFN_MASK)
264
265 typedef struct pgprot { pgprotval_t pgprot; } pgprot_t;
266
267 typedef struct { pgdval_t pgd; } pgd_t;
268
269 #ifdef CONFIG_X86_PAE
270
271 /*
272 * PHYSICAL_PAGE_MASK might be non-constant when SME is compiled in, so we can't
273 * use it here.
274 */
275
276 #define PGD_PAE_PAGE_MASK ((signed long)PAGE_MASK)
277 #define PGD_PAE_PHYS_MASK (((1ULL << __PHYSICAL_MASK_SHIFT)-1) & PGD_PAE_PAGE_MASK)
278
279 /*
280 * PAE allows Base Address, P, PWT, PCD and AVL bits to be set in PGD entries.
281 * All other bits are Reserved MBZ
282 */
283 #define PGD_ALLOWED_BITS (PGD_PAE_PHYS_MASK | _PAGE_PRESENT | \
284 _PAGE_PWT | _PAGE_PCD | \
285 _PAGE_SOFTW1 | _PAGE_SOFTW2 | _PAGE_SOFTW3)
286
287 #else
288 /* No need to mask any bits for !PAE */
289 #define PGD_ALLOWED_BITS (~0ULL)
290 #endif
291
native_make_pgd(pgdval_t val)292 static inline pgd_t native_make_pgd(pgdval_t val)
293 {
294 return (pgd_t) { val & PGD_ALLOWED_BITS };
295 }
296
native_pgd_val(pgd_t pgd)297 static inline pgdval_t native_pgd_val(pgd_t pgd)
298 {
299 return pgd.pgd & PGD_ALLOWED_BITS;
300 }
301
pgd_flags(pgd_t pgd)302 static inline pgdval_t pgd_flags(pgd_t pgd)
303 {
304 return native_pgd_val(pgd) & PTE_FLAGS_MASK;
305 }
306
307 #if CONFIG_PGTABLE_LEVELS > 4
308 typedef struct { p4dval_t p4d; } p4d_t;
309
native_make_p4d(pudval_t val)310 static inline p4d_t native_make_p4d(pudval_t val)
311 {
312 return (p4d_t) { val };
313 }
314
native_p4d_val(p4d_t p4d)315 static inline p4dval_t native_p4d_val(p4d_t p4d)
316 {
317 return p4d.p4d;
318 }
319 #else
320 #include <asm-generic/pgtable-nop4d.h>
321
native_make_p4d(pudval_t val)322 static inline p4d_t native_make_p4d(pudval_t val)
323 {
324 return (p4d_t) { .pgd = native_make_pgd((pgdval_t)val) };
325 }
326
native_p4d_val(p4d_t p4d)327 static inline p4dval_t native_p4d_val(p4d_t p4d)
328 {
329 return native_pgd_val(p4d.pgd);
330 }
331 #endif
332
333 #if CONFIG_PGTABLE_LEVELS > 3
334 typedef struct { pudval_t pud; } pud_t;
335
native_make_pud(pmdval_t val)336 static inline pud_t native_make_pud(pmdval_t val)
337 {
338 return (pud_t) { val };
339 }
340
native_pud_val(pud_t pud)341 static inline pudval_t native_pud_val(pud_t pud)
342 {
343 return pud.pud;
344 }
345 #else
346 #include <asm-generic/pgtable-nopud.h>
347
native_make_pud(pudval_t val)348 static inline pud_t native_make_pud(pudval_t val)
349 {
350 return (pud_t) { .p4d.pgd = native_make_pgd(val) };
351 }
352
native_pud_val(pud_t pud)353 static inline pudval_t native_pud_val(pud_t pud)
354 {
355 return native_pgd_val(pud.p4d.pgd);
356 }
357 #endif
358
359 #if CONFIG_PGTABLE_LEVELS > 2
360 typedef struct { pmdval_t pmd; } pmd_t;
361
native_make_pmd(pmdval_t val)362 static inline pmd_t native_make_pmd(pmdval_t val)
363 {
364 return (pmd_t) { val };
365 }
366
native_pmd_val(pmd_t pmd)367 static inline pmdval_t native_pmd_val(pmd_t pmd)
368 {
369 return pmd.pmd;
370 }
371 #else
372 #include <asm-generic/pgtable-nopmd.h>
373
native_make_pmd(pmdval_t val)374 static inline pmd_t native_make_pmd(pmdval_t val)
375 {
376 return (pmd_t) { .pud.p4d.pgd = native_make_pgd(val) };
377 }
378
native_pmd_val(pmd_t pmd)379 static inline pmdval_t native_pmd_val(pmd_t pmd)
380 {
381 return native_pgd_val(pmd.pud.p4d.pgd);
382 }
383 #endif
384
p4d_pfn_mask(p4d_t p4d)385 static inline p4dval_t p4d_pfn_mask(p4d_t p4d)
386 {
387 /* No 512 GiB huge pages yet */
388 return PTE_PFN_MASK;
389 }
390
p4d_flags_mask(p4d_t p4d)391 static inline p4dval_t p4d_flags_mask(p4d_t p4d)
392 {
393 return ~p4d_pfn_mask(p4d);
394 }
395
p4d_flags(p4d_t p4d)396 static inline p4dval_t p4d_flags(p4d_t p4d)
397 {
398 return native_p4d_val(p4d) & p4d_flags_mask(p4d);
399 }
400
pud_pfn_mask(pud_t pud)401 static inline pudval_t pud_pfn_mask(pud_t pud)
402 {
403 if (native_pud_val(pud) & _PAGE_PSE)
404 return PHYSICAL_PUD_PAGE_MASK;
405 else
406 return PTE_PFN_MASK;
407 }
408
pud_flags_mask(pud_t pud)409 static inline pudval_t pud_flags_mask(pud_t pud)
410 {
411 return ~pud_pfn_mask(pud);
412 }
413
pud_flags(pud_t pud)414 static inline pudval_t pud_flags(pud_t pud)
415 {
416 return native_pud_val(pud) & pud_flags_mask(pud);
417 }
418
pmd_pfn_mask(pmd_t pmd)419 static inline pmdval_t pmd_pfn_mask(pmd_t pmd)
420 {
421 if (native_pmd_val(pmd) & _PAGE_PSE)
422 return PHYSICAL_PMD_PAGE_MASK;
423 else
424 return PTE_PFN_MASK;
425 }
426
pmd_flags_mask(pmd_t pmd)427 static inline pmdval_t pmd_flags_mask(pmd_t pmd)
428 {
429 return ~pmd_pfn_mask(pmd);
430 }
431
pmd_flags(pmd_t pmd)432 static inline pmdval_t pmd_flags(pmd_t pmd)
433 {
434 return native_pmd_val(pmd) & pmd_flags_mask(pmd);
435 }
436
native_make_pte(pteval_t val)437 static inline pte_t native_make_pte(pteval_t val)
438 {
439 return (pte_t) { .pte = val };
440 }
441
native_pte_val(pte_t pte)442 static inline pteval_t native_pte_val(pte_t pte)
443 {
444 return pte.pte;
445 }
446
pte_flags(pte_t pte)447 static inline pteval_t pte_flags(pte_t pte)
448 {
449 return native_pte_val(pte) & PTE_FLAGS_MASK;
450 }
451
452 #define pgprot_val(x) ((x).pgprot)
453 #define __pgprot(x) ((pgprot_t) { (x) } )
454
455 extern uint16_t __cachemode2pte_tbl[_PAGE_CACHE_MODE_NUM];
456 extern uint8_t __pte2cachemode_tbl[8];
457
458 #define __pte2cm_idx(cb) \
459 ((((cb) >> (_PAGE_BIT_PAT - 2)) & 4) | \
460 (((cb) >> (_PAGE_BIT_PCD - 1)) & 2) | \
461 (((cb) >> _PAGE_BIT_PWT) & 1))
462 #define __cm_idx2pte(i) \
463 ((((i) & 4) << (_PAGE_BIT_PAT - 2)) | \
464 (((i) & 2) << (_PAGE_BIT_PCD - 1)) | \
465 (((i) & 1) << _PAGE_BIT_PWT))
466
cachemode2protval(enum page_cache_mode pcm)467 static inline unsigned long cachemode2protval(enum page_cache_mode pcm)
468 {
469 if (likely(pcm == 0))
470 return 0;
471 return __cachemode2pte_tbl[pcm];
472 }
cachemode2pgprot(enum page_cache_mode pcm)473 static inline pgprot_t cachemode2pgprot(enum page_cache_mode pcm)
474 {
475 return __pgprot(cachemode2protval(pcm));
476 }
pgprot2cachemode(pgprot_t pgprot)477 static inline enum page_cache_mode pgprot2cachemode(pgprot_t pgprot)
478 {
479 unsigned long masked;
480
481 masked = pgprot_val(pgprot) & _PAGE_CACHE_MASK;
482 if (likely(masked == 0))
483 return 0;
484 return __pte2cachemode_tbl[__pte2cm_idx(masked)];
485 }
pgprot_4k_2_large(pgprot_t pgprot)486 static inline pgprot_t pgprot_4k_2_large(pgprot_t pgprot)
487 {
488 pgprotval_t val = pgprot_val(pgprot);
489 pgprot_t new;
490
491 pgprot_val(new) = (val & ~(_PAGE_PAT | _PAGE_PAT_LARGE)) |
492 ((val & _PAGE_PAT) << (_PAGE_BIT_PAT_LARGE - _PAGE_BIT_PAT));
493 return new;
494 }
pgprot_large_2_4k(pgprot_t pgprot)495 static inline pgprot_t pgprot_large_2_4k(pgprot_t pgprot)
496 {
497 pgprotval_t val = pgprot_val(pgprot);
498 pgprot_t new;
499
500 pgprot_val(new) = (val & ~(_PAGE_PAT | _PAGE_PAT_LARGE)) |
501 ((val & _PAGE_PAT_LARGE) >>
502 (_PAGE_BIT_PAT_LARGE - _PAGE_BIT_PAT));
503 return new;
504 }
505
506
507 typedef struct page *pgtable_t;
508
509 extern pteval_t __supported_pte_mask;
510 extern pteval_t __default_kernel_pte_mask;
511 extern void set_nx(void);
512 extern int nx_enabled;
513
514 #define pgprot_writecombine pgprot_writecombine
515 extern pgprot_t pgprot_writecombine(pgprot_t prot);
516
517 #define pgprot_writethrough pgprot_writethrough
518 extern pgprot_t pgprot_writethrough(pgprot_t prot);
519
520 /* Indicate that x86 has its own track and untrack pfn vma functions */
521 #define __HAVE_PFNMAP_TRACKING
522
523 #define __HAVE_PHYS_MEM_ACCESS_PROT
524 struct file;
525 pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
526 unsigned long size, pgprot_t vma_prot);
527
528 /* Install a pte for a particular vaddr in kernel space. */
529 void set_pte_vaddr(unsigned long vaddr, pte_t pte);
530
531 #ifdef CONFIG_X86_32
532 extern void native_pagetable_init(void);
533 #else
534 #define native_pagetable_init paging_init
535 #endif
536
537 struct seq_file;
538 extern void arch_report_meminfo(struct seq_file *m);
539
540 enum pg_level {
541 PG_LEVEL_NONE,
542 PG_LEVEL_4K,
543 PG_LEVEL_2M,
544 PG_LEVEL_1G,
545 PG_LEVEL_512G,
546 PG_LEVEL_NUM
547 };
548
549 #ifdef CONFIG_PROC_FS
550 extern void update_page_count(int level, unsigned long pages);
551 #else
update_page_count(int level,unsigned long pages)552 static inline void update_page_count(int level, unsigned long pages) { }
553 #endif
554
555 /*
556 * Helper function that returns the kernel pagetable entry controlling
557 * the virtual address 'address'. NULL means no pagetable entry present.
558 * NOTE: the return type is pte_t but if the pmd is PSE then we return it
559 * as a pte too.
560 */
561 extern pte_t *lookup_address(unsigned long address, unsigned int *level);
562 extern pte_t *lookup_address_in_pgd(pgd_t *pgd, unsigned long address,
563 unsigned int *level);
564 extern pmd_t *lookup_pmd_address(unsigned long address);
565 extern phys_addr_t slow_virt_to_phys(void *__address);
566 extern int __init kernel_map_pages_in_pgd(pgd_t *pgd, u64 pfn,
567 unsigned long address,
568 unsigned numpages,
569 unsigned long page_flags);
570 extern int __init kernel_unmap_pages_in_pgd(pgd_t *pgd, unsigned long address,
571 unsigned long numpages);
572 #endif /* !__ASSEMBLY__ */
573
574 #endif /* _ASM_X86_PGTABLE_DEFS_H */
575