1
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
13#define _PAGE_BIT_RW 1
14#define _PAGE_BIT_USER 2
15#define _PAGE_BIT_PWT 3
16#define _PAGE_BIT_PCD 4
17#define _PAGE_BIT_ACCESSED 5
18#define _PAGE_BIT_DIRTY 6
19#define _PAGE_BIT_PSE 7
20#define _PAGE_BIT_PAT 7
21#define _PAGE_BIT_GLOBAL 8
22#define _PAGE_BIT_SOFTW1 9
23#define _PAGE_BIT_SOFTW2 10
24#define _PAGE_BIT_SOFTW3 11
25#define _PAGE_BIT_PAT_LARGE 12
26#define _PAGE_BIT_SOFTW4 58
27#define _PAGE_BIT_PKEY_BIT0 59
28#define _PAGE_BIT_PKEY_BIT1 60
29#define _PAGE_BIT_PKEY_BIT2 61
30#define _PAGE_BIT_PKEY_BIT3 62
31#define _PAGE_BIT_NX 63
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
36#define _PAGE_BIT_DEVMAP _PAGE_BIT_SOFTW4
37
38
39
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
89
90
91
92
93
94
95
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
120
121
122
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
131
132
133
134
135
136
137#ifndef __ASSEMBLY__
138enum 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
215
216
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
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
242#define PDE_IDENT_ATTR 0x063
243#define PGD_IDENT_ATTR 0x001
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
257#define PTE_PFN_MASK ((pteval_t)PHYSICAL_PAGE_MASK)
258
259
260
261
262
263#define PTE_FLAGS_MASK (~PTE_PFN_MASK)
264
265typedef struct pgprot { pgprotval_t pgprot; } pgprot_t;
266
267typedef struct { pgdval_t pgd; } pgd_t;
268
269#ifdef CONFIG_X86_PAE
270
271
272
273
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
281
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
289#define PGD_ALLOWED_BITS (~0ULL)
290#endif
291
292static inline pgd_t native_make_pgd(pgdval_t val)
293{
294 return (pgd_t) { val & PGD_ALLOWED_BITS };
295}
296
297static inline pgdval_t native_pgd_val(pgd_t pgd)
298{
299 return pgd.pgd & PGD_ALLOWED_BITS;
300}
301
302static 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
308typedef struct { p4dval_t p4d; } p4d_t;
309
310static inline p4d_t native_make_p4d(pudval_t val)
311{
312 return (p4d_t) { val };
313}
314
315static 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
322static inline p4d_t native_make_p4d(pudval_t val)
323{
324 return (p4d_t) { .pgd = native_make_pgd((pgdval_t)val) };
325}
326
327static 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
334typedef struct { pudval_t pud; } pud_t;
335
336static inline pud_t native_make_pud(pmdval_t val)
337{
338 return (pud_t) { val };
339}
340
341static 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
348static inline pud_t native_make_pud(pudval_t val)
349{
350 return (pud_t) { .p4d.pgd = native_make_pgd(val) };
351}
352
353static 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
360typedef struct { pmdval_t pmd; } pmd_t;
361
362static inline pmd_t native_make_pmd(pmdval_t val)
363{
364 return (pmd_t) { val };
365}
366
367static 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
374static inline pmd_t native_make_pmd(pmdval_t val)
375{
376 return (pmd_t) { .pud.p4d.pgd = native_make_pgd(val) };
377}
378
379static inline pmdval_t native_pmd_val(pmd_t pmd)
380{
381 return native_pgd_val(pmd.pud.p4d.pgd);
382}
383#endif
384
385static inline p4dval_t p4d_pfn_mask(p4d_t p4d)
386{
387
388 return PTE_PFN_MASK;
389}
390
391static inline p4dval_t p4d_flags_mask(p4d_t p4d)
392{
393 return ~p4d_pfn_mask(p4d);
394}
395
396static inline p4dval_t p4d_flags(p4d_t p4d)
397{
398 return native_p4d_val(p4d) & p4d_flags_mask(p4d);
399}
400
401static 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
409static inline pudval_t pud_flags_mask(pud_t pud)
410{
411 return ~pud_pfn_mask(pud);
412}
413
414static inline pudval_t pud_flags(pud_t pud)
415{
416 return native_pud_val(pud) & pud_flags_mask(pud);
417}
418
419static 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
427static inline pmdval_t pmd_flags_mask(pmd_t pmd)
428{
429 return ~pmd_pfn_mask(pmd);
430}
431
432static inline pmdval_t pmd_flags(pmd_t pmd)
433{
434 return native_pmd_val(pmd) & pmd_flags_mask(pmd);
435}
436
437static inline pte_t native_make_pte(pteval_t val)
438{
439 return (pte_t) { .pte = val };
440}
441
442static inline pteval_t native_pte_val(pte_t pte)
443{
444 return pte.pte;
445}
446
447static 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
455extern uint16_t __cachemode2pte_tbl[_PAGE_CACHE_MODE_NUM];
456extern 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
467static inline unsigned long cachemode2protval(enum page_cache_mode pcm)
468{
469 if (likely(pcm == 0))
470 return 0;
471 return __cachemode2pte_tbl[pcm];
472}
473static inline pgprot_t cachemode2pgprot(enum page_cache_mode pcm)
474{
475 return __pgprot(cachemode2protval(pcm));
476}
477static 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}
486static 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}
495static 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
507typedef struct page *pgtable_t;
508
509extern pteval_t __supported_pte_mask;
510extern pteval_t __default_kernel_pte_mask;
511extern void set_nx(void);
512extern int nx_enabled;
513
514#define pgprot_writecombine pgprot_writecombine
515extern pgprot_t pgprot_writecombine(pgprot_t prot);
516
517#define pgprot_writethrough pgprot_writethrough
518extern pgprot_t pgprot_writethrough(pgprot_t prot);
519
520
521#define __HAVE_PFNMAP_TRACKING
522
523#define __HAVE_PHYS_MEM_ACCESS_PROT
524struct file;
525pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
526 unsigned long size, pgprot_t vma_prot);
527
528
529void set_pte_vaddr(unsigned long vaddr, pte_t pte);
530
531#ifdef CONFIG_X86_32
532extern void native_pagetable_init(void);
533#else
534#define native_pagetable_init paging_init
535#endif
536
537struct seq_file;
538extern void arch_report_meminfo(struct seq_file *m);
539
540enum 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
550extern void update_page_count(int level, unsigned long pages);
551#else
552static inline void update_page_count(int level, unsigned long pages) { }
553#endif
554
555
556
557
558
559
560
561extern pte_t *lookup_address(unsigned long address, unsigned int *level);
562extern pte_t *lookup_address_in_pgd(pgd_t *pgd, unsigned long address,
563 unsigned int *level);
564extern pmd_t *lookup_pmd_address(unsigned long address);
565extern phys_addr_t slow_virt_to_phys(void *__address);
566extern int __init kernel_map_pages_in_pgd(pgd_t *pgd, u64 pfn,
567 unsigned long address,
568 unsigned numpages,
569 unsigned long page_flags);
570extern int __init kernel_unmap_pages_in_pgd(pgd_t *pgd, unsigned long address,
571 unsigned long numpages);
572#endif
573
574#endif
575