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_CC | _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_CC (_AT(pteval_t, cc_mask))
177 #define _PAGE_ENC (_AT(pteval_t, sme_me_mask))
178
179 #define _PAGE_CACHE_MASK (_PAGE_PWT | _PAGE_PCD | _PAGE_PAT)
180 #define _PAGE_LARGE_CACHE_MASK (_PAGE_PWT | _PAGE_PCD | _PAGE_PAT_LARGE)
181
182 #define _PAGE_NOCACHE (cachemode2protval(_PAGE_CACHE_MODE_UC))
183 #define _PAGE_CACHE_WP (cachemode2protval(_PAGE_CACHE_MODE_WP))
184
185 #define __PP _PAGE_PRESENT
186 #define __RW _PAGE_RW
187 #define _USR _PAGE_USER
188 #define ___A _PAGE_ACCESSED
189 #define ___D _PAGE_DIRTY
190 #define ___G _PAGE_GLOBAL
191 #define __NX _PAGE_NX
192
193 #define _ENC _PAGE_ENC
194 #define __WP _PAGE_CACHE_WP
195 #define __NC _PAGE_NOCACHE
196 #define _PSE _PAGE_PSE
197
198 #define pgprot_val(x) ((x).pgprot)
199 #define __pgprot(x) ((pgprot_t) { (x) } )
200 #define __pg(x) __pgprot(x)
201
202 #define PAGE_NONE __pg( 0| 0| 0|___A| 0| 0| 0|___G)
203 #define PAGE_SHARED __pg(__PP|__RW|_USR|___A|__NX| 0| 0| 0)
204 #define PAGE_SHARED_EXEC __pg(__PP|__RW|_USR|___A| 0| 0| 0| 0)
205 #define PAGE_COPY_NOEXEC __pg(__PP| 0|_USR|___A|__NX| 0| 0| 0)
206 #define PAGE_COPY_EXEC __pg(__PP| 0|_USR|___A| 0| 0| 0| 0)
207 #define PAGE_COPY __pg(__PP| 0|_USR|___A|__NX| 0| 0| 0)
208 #define PAGE_READONLY __pg(__PP| 0|_USR|___A|__NX| 0| 0| 0)
209 #define PAGE_READONLY_EXEC __pg(__PP| 0|_USR|___A| 0| 0| 0| 0)
210
211 #define __PAGE_KERNEL (__PP|__RW| 0|___A|__NX|___D| 0|___G)
212 #define __PAGE_KERNEL_EXEC (__PP|__RW| 0|___A| 0|___D| 0|___G)
213
214 /*
215 * Page tables needs to have Write=1 in order for any lower PTEs to be
216 * writable. This includes shadow stack memory (Write=0, Dirty=1)
217 */
218 #define _KERNPG_TABLE_NOENC (__PP|__RW| 0|___A| 0|___D| 0| 0)
219 #define _KERNPG_TABLE (__PP|__RW| 0|___A| 0|___D| 0| 0| _ENC)
220 #define _PAGE_TABLE_NOENC (__PP|__RW|_USR|___A| 0|___D| 0| 0)
221 #define _PAGE_TABLE (__PP|__RW|_USR|___A| 0|___D| 0| 0| _ENC)
222
223 #define __PAGE_KERNEL_RO (__PP| 0| 0|___A|__NX| 0| 0|___G)
224 #define __PAGE_KERNEL_ROX (__PP| 0| 0|___A| 0| 0| 0|___G)
225 #define __PAGE_KERNEL (__PP|__RW| 0|___A|__NX|___D| 0|___G)
226 #define __PAGE_KERNEL_EXEC (__PP|__RW| 0|___A| 0|___D| 0|___G)
227 #define __PAGE_KERNEL_NOCACHE (__PP|__RW| 0|___A|__NX|___D| 0|___G| __NC)
228 #define __PAGE_KERNEL_VVAR (__PP| 0|_USR|___A|__NX| 0| 0|___G)
229 #define __PAGE_KERNEL_LARGE (__PP|__RW| 0|___A|__NX|___D|_PSE|___G)
230 #define __PAGE_KERNEL_LARGE_EXEC (__PP|__RW| 0|___A| 0|___D|_PSE|___G)
231 #define __PAGE_KERNEL_WP (__PP|__RW| 0|___A|__NX|___D| 0|___G| __WP)
232
233
234 #define __PAGE_KERNEL_IO __PAGE_KERNEL
235 #define __PAGE_KERNEL_IO_NOCACHE __PAGE_KERNEL_NOCACHE
236
237
238 #ifndef __ASSEMBLY__
239
240 #define __PAGE_KERNEL_ENC (__PAGE_KERNEL | _ENC)
241 #define __PAGE_KERNEL_ENC_WP (__PAGE_KERNEL_WP | _ENC)
242 #define __PAGE_KERNEL_NOENC (__PAGE_KERNEL | 0)
243 #define __PAGE_KERNEL_NOENC_WP (__PAGE_KERNEL_WP | 0)
244
245 #define __pgprot_mask(x) __pgprot((x) & __default_kernel_pte_mask)
246
247 #define PAGE_KERNEL __pgprot_mask(__PAGE_KERNEL | _ENC)
248 #define PAGE_KERNEL_NOENC __pgprot_mask(__PAGE_KERNEL | 0)
249 #define PAGE_KERNEL_RO __pgprot_mask(__PAGE_KERNEL_RO | _ENC)
250 #define PAGE_KERNEL_EXEC __pgprot_mask(__PAGE_KERNEL_EXEC | _ENC)
251 #define PAGE_KERNEL_EXEC_NOENC __pgprot_mask(__PAGE_KERNEL_EXEC | 0)
252 #define PAGE_KERNEL_ROX __pgprot_mask(__PAGE_KERNEL_ROX | _ENC)
253 #define PAGE_KERNEL_NOCACHE __pgprot_mask(__PAGE_KERNEL_NOCACHE | _ENC)
254 #define PAGE_KERNEL_LARGE __pgprot_mask(__PAGE_KERNEL_LARGE | _ENC)
255 #define PAGE_KERNEL_LARGE_EXEC __pgprot_mask(__PAGE_KERNEL_LARGE_EXEC | _ENC)
256 #define PAGE_KERNEL_VVAR __pgprot_mask(__PAGE_KERNEL_VVAR | _ENC)
257
258 #define PAGE_KERNEL_IO __pgprot_mask(__PAGE_KERNEL_IO)
259 #define PAGE_KERNEL_IO_NOCACHE __pgprot_mask(__PAGE_KERNEL_IO_NOCACHE)
260
261 #endif /* __ASSEMBLY__ */
262
263 /*
264 * early identity mapping pte attrib macros.
265 */
266 #ifdef CONFIG_X86_64
267 #define __PAGE_KERNEL_IDENT_LARGE_EXEC __PAGE_KERNEL_LARGE_EXEC
268 #else
269 #define PTE_IDENT_ATTR 0x003 /* PRESENT+RW */
270 #define PDE_IDENT_ATTR 0x063 /* PRESENT+RW+DIRTY+ACCESSED */
271 #define PGD_IDENT_ATTR 0x001 /* PRESENT (no other attributes) */
272 #endif
273
274 #ifdef CONFIG_X86_32
275 # include <asm/pgtable_32_types.h>
276 #else
277 # include <asm/pgtable_64_types.h>
278 #endif
279
280 #ifndef __ASSEMBLY__
281
282 #include <linux/types.h>
283
284 /* Extracts the PFN from a (pte|pmd|pud|pgd)val_t of a 4KB page */
285 #define PTE_PFN_MASK ((pteval_t)PHYSICAL_PAGE_MASK)
286
287 /*
288 * Extracts the flags from a (pte|pmd|pud|pgd)val_t
289 * This includes the protection key value.
290 */
291 #define PTE_FLAGS_MASK (~PTE_PFN_MASK)
292
293 typedef struct pgprot { pgprotval_t pgprot; } pgprot_t;
294
295 typedef struct { pgdval_t pgd; } pgd_t;
296
pgprot_nx(pgprot_t prot)297 static inline pgprot_t pgprot_nx(pgprot_t prot)
298 {
299 return __pgprot(pgprot_val(prot) | _PAGE_NX);
300 }
301 #define pgprot_nx pgprot_nx
302
303 #ifdef CONFIG_X86_PAE
304
305 /*
306 * PHYSICAL_PAGE_MASK might be non-constant when SME is compiled in, so we can't
307 * use it here.
308 */
309
310 #define PGD_PAE_PAGE_MASK ((signed long)PAGE_MASK)
311 #define PGD_PAE_PHYS_MASK (((1ULL << __PHYSICAL_MASK_SHIFT)-1) & PGD_PAE_PAGE_MASK)
312
313 /*
314 * PAE allows Base Address, P, PWT, PCD and AVL bits to be set in PGD entries.
315 * All other bits are Reserved MBZ
316 */
317 #define PGD_ALLOWED_BITS (PGD_PAE_PHYS_MASK | _PAGE_PRESENT | \
318 _PAGE_PWT | _PAGE_PCD | \
319 _PAGE_SOFTW1 | _PAGE_SOFTW2 | _PAGE_SOFTW3)
320
321 #else
322 /* No need to mask any bits for !PAE */
323 #define PGD_ALLOWED_BITS (~0ULL)
324 #endif
325
native_make_pgd(pgdval_t val)326 static inline pgd_t native_make_pgd(pgdval_t val)
327 {
328 return (pgd_t) { val & PGD_ALLOWED_BITS };
329 }
330
native_pgd_val(pgd_t pgd)331 static inline pgdval_t native_pgd_val(pgd_t pgd)
332 {
333 return pgd.pgd & PGD_ALLOWED_BITS;
334 }
335
pgd_flags(pgd_t pgd)336 static inline pgdval_t pgd_flags(pgd_t pgd)
337 {
338 return native_pgd_val(pgd) & PTE_FLAGS_MASK;
339 }
340
341 #if CONFIG_PGTABLE_LEVELS > 4
342 typedef struct { p4dval_t p4d; } p4d_t;
343
native_make_p4d(pudval_t val)344 static inline p4d_t native_make_p4d(pudval_t val)
345 {
346 return (p4d_t) { val };
347 }
348
native_p4d_val(p4d_t p4d)349 static inline p4dval_t native_p4d_val(p4d_t p4d)
350 {
351 return p4d.p4d;
352 }
353 #else
354 #include <asm-generic/pgtable-nop4d.h>
355
native_make_p4d(pudval_t val)356 static inline p4d_t native_make_p4d(pudval_t val)
357 {
358 return (p4d_t) { .pgd = native_make_pgd((pgdval_t)val) };
359 }
360
native_p4d_val(p4d_t p4d)361 static inline p4dval_t native_p4d_val(p4d_t p4d)
362 {
363 return native_pgd_val(p4d.pgd);
364 }
365 #endif
366
367 #if CONFIG_PGTABLE_LEVELS > 3
368 typedef struct { pudval_t pud; } pud_t;
369
native_make_pud(pmdval_t val)370 static inline pud_t native_make_pud(pmdval_t val)
371 {
372 return (pud_t) { val };
373 }
374
native_pud_val(pud_t pud)375 static inline pudval_t native_pud_val(pud_t pud)
376 {
377 return pud.pud;
378 }
379 #else
380 #include <asm-generic/pgtable-nopud.h>
381
native_make_pud(pudval_t val)382 static inline pud_t native_make_pud(pudval_t val)
383 {
384 return (pud_t) { .p4d.pgd = native_make_pgd(val) };
385 }
386
native_pud_val(pud_t pud)387 static inline pudval_t native_pud_val(pud_t pud)
388 {
389 return native_pgd_val(pud.p4d.pgd);
390 }
391 #endif
392
393 #if CONFIG_PGTABLE_LEVELS > 2
native_make_pmd(pmdval_t val)394 static inline pmd_t native_make_pmd(pmdval_t val)
395 {
396 return (pmd_t) { .pmd = val };
397 }
398
native_pmd_val(pmd_t pmd)399 static inline pmdval_t native_pmd_val(pmd_t pmd)
400 {
401 return pmd.pmd;
402 }
403 #else
404 #include <asm-generic/pgtable-nopmd.h>
405
native_make_pmd(pmdval_t val)406 static inline pmd_t native_make_pmd(pmdval_t val)
407 {
408 return (pmd_t) { .pud.p4d.pgd = native_make_pgd(val) };
409 }
410
native_pmd_val(pmd_t pmd)411 static inline pmdval_t native_pmd_val(pmd_t pmd)
412 {
413 return native_pgd_val(pmd.pud.p4d.pgd);
414 }
415 #endif
416
p4d_pfn_mask(p4d_t p4d)417 static inline p4dval_t p4d_pfn_mask(p4d_t p4d)
418 {
419 /* No 512 GiB huge pages yet */
420 return PTE_PFN_MASK;
421 }
422
p4d_flags_mask(p4d_t p4d)423 static inline p4dval_t p4d_flags_mask(p4d_t p4d)
424 {
425 return ~p4d_pfn_mask(p4d);
426 }
427
p4d_flags(p4d_t p4d)428 static inline p4dval_t p4d_flags(p4d_t p4d)
429 {
430 return native_p4d_val(p4d) & p4d_flags_mask(p4d);
431 }
432
pud_pfn_mask(pud_t pud)433 static inline pudval_t pud_pfn_mask(pud_t pud)
434 {
435 if (native_pud_val(pud) & _PAGE_PSE)
436 return PHYSICAL_PUD_PAGE_MASK;
437 else
438 return PTE_PFN_MASK;
439 }
440
pud_flags_mask(pud_t pud)441 static inline pudval_t pud_flags_mask(pud_t pud)
442 {
443 return ~pud_pfn_mask(pud);
444 }
445
pud_flags(pud_t pud)446 static inline pudval_t pud_flags(pud_t pud)
447 {
448 return native_pud_val(pud) & pud_flags_mask(pud);
449 }
450
pmd_pfn_mask(pmd_t pmd)451 static inline pmdval_t pmd_pfn_mask(pmd_t pmd)
452 {
453 if (native_pmd_val(pmd) & _PAGE_PSE)
454 return PHYSICAL_PMD_PAGE_MASK;
455 else
456 return PTE_PFN_MASK;
457 }
458
pmd_flags_mask(pmd_t pmd)459 static inline pmdval_t pmd_flags_mask(pmd_t pmd)
460 {
461 return ~pmd_pfn_mask(pmd);
462 }
463
pmd_flags(pmd_t pmd)464 static inline pmdval_t pmd_flags(pmd_t pmd)
465 {
466 return native_pmd_val(pmd) & pmd_flags_mask(pmd);
467 }
468
native_make_pte(pteval_t val)469 static inline pte_t native_make_pte(pteval_t val)
470 {
471 return (pte_t) { .pte = val };
472 }
473
native_pte_val(pte_t pte)474 static inline pteval_t native_pte_val(pte_t pte)
475 {
476 return pte.pte;
477 }
478
pte_flags(pte_t pte)479 static inline pteval_t pte_flags(pte_t pte)
480 {
481 return native_pte_val(pte) & PTE_FLAGS_MASK;
482 }
483
484 #define __pte2cm_idx(cb) \
485 ((((cb) >> (_PAGE_BIT_PAT - 2)) & 4) | \
486 (((cb) >> (_PAGE_BIT_PCD - 1)) & 2) | \
487 (((cb) >> _PAGE_BIT_PWT) & 1))
488 #define __cm_idx2pte(i) \
489 ((((i) & 4) << (_PAGE_BIT_PAT - 2)) | \
490 (((i) & 2) << (_PAGE_BIT_PCD - 1)) | \
491 (((i) & 1) << _PAGE_BIT_PWT))
492
493 unsigned long cachemode2protval(enum page_cache_mode pcm);
494
protval_4k_2_large(pgprotval_t val)495 static inline pgprotval_t protval_4k_2_large(pgprotval_t val)
496 {
497 return (val & ~(_PAGE_PAT | _PAGE_PAT_LARGE)) |
498 ((val & _PAGE_PAT) << (_PAGE_BIT_PAT_LARGE - _PAGE_BIT_PAT));
499 }
pgprot_4k_2_large(pgprot_t pgprot)500 static inline pgprot_t pgprot_4k_2_large(pgprot_t pgprot)
501 {
502 return __pgprot(protval_4k_2_large(pgprot_val(pgprot)));
503 }
protval_large_2_4k(pgprotval_t val)504 static inline pgprotval_t protval_large_2_4k(pgprotval_t val)
505 {
506 return (val & ~(_PAGE_PAT | _PAGE_PAT_LARGE)) |
507 ((val & _PAGE_PAT_LARGE) >>
508 (_PAGE_BIT_PAT_LARGE - _PAGE_BIT_PAT));
509 }
pgprot_large_2_4k(pgprot_t pgprot)510 static inline pgprot_t pgprot_large_2_4k(pgprot_t pgprot)
511 {
512 return __pgprot(protval_large_2_4k(pgprot_val(pgprot)));
513 }
514
515
516 typedef struct page *pgtable_t;
517
518 extern pteval_t __supported_pte_mask;
519 extern pteval_t __default_kernel_pte_mask;
520
521 #define pgprot_writecombine pgprot_writecombine
522 extern pgprot_t pgprot_writecombine(pgprot_t prot);
523
524 #define pgprot_writethrough pgprot_writethrough
525 extern pgprot_t pgprot_writethrough(pgprot_t prot);
526
527 /* Indicate that x86 has its own track and untrack pfn vma functions */
528 #define __HAVE_PFNMAP_TRACKING
529
530 #define __HAVE_PHYS_MEM_ACCESS_PROT
531 struct file;
532 pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
533 unsigned long size, pgprot_t vma_prot);
534
535 /* Install a pte for a particular vaddr in kernel space. */
536 void set_pte_vaddr(unsigned long vaddr, pte_t pte);
537
538 #ifdef CONFIG_X86_32
539 extern void native_pagetable_init(void);
540 #else
541 #define native_pagetable_init paging_init
542 #endif
543
544 enum pg_level {
545 PG_LEVEL_NONE,
546 PG_LEVEL_4K,
547 PG_LEVEL_2M,
548 PG_LEVEL_1G,
549 PG_LEVEL_512G,
550 PG_LEVEL_256T,
551 PG_LEVEL_NUM
552 };
553
554 #ifdef CONFIG_PROC_FS
555 extern void update_page_count(int level, unsigned long pages);
556 #else
update_page_count(int level,unsigned long pages)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 pte_t *lookup_address_in_pgd_attr(pgd_t *pgd, unsigned long address,
570 unsigned int *level, bool *nx, bool *rw);
571 extern pmd_t *lookup_pmd_address(unsigned long address);
572 extern phys_addr_t slow_virt_to_phys(void *__address);
573 extern int __init kernel_map_pages_in_pgd(pgd_t *pgd, u64 pfn,
574 unsigned long address,
575 unsigned numpages,
576 unsigned long page_flags);
577 extern int __init kernel_unmap_pages_in_pgd(pgd_t *pgd, unsigned long address,
578 unsigned long numpages);
579 #endif /* !__ASSEMBLY__ */
580
581 #endif /* _ASM_X86_PGTABLE_DEFS_H */
582