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 _PAGE_BIT_PRESENT 0
11#define _PAGE_BIT_RW 1
12#define _PAGE_BIT_USER 2
13#define _PAGE_BIT_PWT 3
14#define _PAGE_BIT_PCD 4
15#define _PAGE_BIT_ACCESSED 5
16#define _PAGE_BIT_DIRTY 6
17#define _PAGE_BIT_PSE 7
18#define _PAGE_BIT_PAT 7
19#define _PAGE_BIT_GLOBAL 8
20#define _PAGE_BIT_SOFTW1 9
21#define _PAGE_BIT_SOFTW2 10
22#define _PAGE_BIT_SOFTW3 11
23#define _PAGE_BIT_PAT_LARGE 12
24#define _PAGE_BIT_SOFTW4 58
25#define _PAGE_BIT_PKEY_BIT0 59
26#define _PAGE_BIT_PKEY_BIT1 60
27#define _PAGE_BIT_PKEY_BIT2 61
28#define _PAGE_BIT_PKEY_BIT3 62
29#define _PAGE_BIT_NX 63
30
31#define _PAGE_BIT_SPECIAL _PAGE_BIT_SOFTW1
32#define _PAGE_BIT_CPA_TEST _PAGE_BIT_SOFTW1
33#define _PAGE_BIT_UFFD_WP _PAGE_BIT_SOFTW2
34#define _PAGE_BIT_SOFT_DIRTY _PAGE_BIT_SOFTW3
35#define _PAGE_BIT_DEVMAP _PAGE_BIT_SOFTW4
36
37
38
39#define _PAGE_BIT_PROTNONE _PAGE_BIT_GLOBAL
40
41#define _PAGE_PRESENT (_AT(pteval_t, 1) << _PAGE_BIT_PRESENT)
42#define _PAGE_RW (_AT(pteval_t, 1) << _PAGE_BIT_RW)
43#define _PAGE_USER (_AT(pteval_t, 1) << _PAGE_BIT_USER)
44#define _PAGE_PWT (_AT(pteval_t, 1) << _PAGE_BIT_PWT)
45#define _PAGE_PCD (_AT(pteval_t, 1) << _PAGE_BIT_PCD)
46#define _PAGE_ACCESSED (_AT(pteval_t, 1) << _PAGE_BIT_ACCESSED)
47#define _PAGE_DIRTY (_AT(pteval_t, 1) << _PAGE_BIT_DIRTY)
48#define _PAGE_PSE (_AT(pteval_t, 1) << _PAGE_BIT_PSE)
49#define _PAGE_GLOBAL (_AT(pteval_t, 1) << _PAGE_BIT_GLOBAL)
50#define _PAGE_SOFTW1 (_AT(pteval_t, 1) << _PAGE_BIT_SOFTW1)
51#define _PAGE_SOFTW2 (_AT(pteval_t, 1) << _PAGE_BIT_SOFTW2)
52#define _PAGE_SOFTW3 (_AT(pteval_t, 1) << _PAGE_BIT_SOFTW3)
53#define _PAGE_PAT (_AT(pteval_t, 1) << _PAGE_BIT_PAT)
54#define _PAGE_PAT_LARGE (_AT(pteval_t, 1) << _PAGE_BIT_PAT_LARGE)
55#define _PAGE_SPECIAL (_AT(pteval_t, 1) << _PAGE_BIT_SPECIAL)
56#define _PAGE_CPA_TEST (_AT(pteval_t, 1) << _PAGE_BIT_CPA_TEST)
57#ifdef CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS
58#define _PAGE_PKEY_BIT0 (_AT(pteval_t, 1) << _PAGE_BIT_PKEY_BIT0)
59#define _PAGE_PKEY_BIT1 (_AT(pteval_t, 1) << _PAGE_BIT_PKEY_BIT1)
60#define _PAGE_PKEY_BIT2 (_AT(pteval_t, 1) << _PAGE_BIT_PKEY_BIT2)
61#define _PAGE_PKEY_BIT3 (_AT(pteval_t, 1) << _PAGE_BIT_PKEY_BIT3)
62#else
63#define _PAGE_PKEY_BIT0 (_AT(pteval_t, 0))
64#define _PAGE_PKEY_BIT1 (_AT(pteval_t, 0))
65#define _PAGE_PKEY_BIT2 (_AT(pteval_t, 0))
66#define _PAGE_PKEY_BIT3 (_AT(pteval_t, 0))
67#endif
68
69#define _PAGE_PKEY_MASK (_PAGE_PKEY_BIT0 | \
70 _PAGE_PKEY_BIT1 | \
71 _PAGE_PKEY_BIT2 | \
72 _PAGE_PKEY_BIT3)
73
74#if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
75#define _PAGE_KNL_ERRATUM_MASK (_PAGE_DIRTY | _PAGE_ACCESSED)
76#else
77#define _PAGE_KNL_ERRATUM_MASK 0
78#endif
79
80#ifdef CONFIG_MEM_SOFT_DIRTY
81#define _PAGE_SOFT_DIRTY (_AT(pteval_t, 1) << _PAGE_BIT_SOFT_DIRTY)
82#else
83#define _PAGE_SOFT_DIRTY (_AT(pteval_t, 0))
84#endif
85
86
87
88
89
90
91
92
93
94
95
96#ifdef CONFIG_MEM_SOFT_DIRTY
97#define _PAGE_SWP_SOFT_DIRTY _PAGE_RW
98#else
99#define _PAGE_SWP_SOFT_DIRTY (_AT(pteval_t, 0))
100#endif
101
102#ifdef CONFIG_HAVE_ARCH_USERFAULTFD_WP
103#define _PAGE_UFFD_WP (_AT(pteval_t, 1) << _PAGE_BIT_UFFD_WP)
104#define _PAGE_SWP_UFFD_WP _PAGE_USER
105#else
106#define _PAGE_UFFD_WP (_AT(pteval_t, 0))
107#define _PAGE_SWP_UFFD_WP (_AT(pteval_t, 0))
108#endif
109
110#if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
111#define _PAGE_NX (_AT(pteval_t, 1) << _PAGE_BIT_NX)
112#define _PAGE_DEVMAP (_AT(u64, 1) << _PAGE_BIT_DEVMAP)
113#else
114#define _PAGE_NX (_AT(pteval_t, 0))
115#define _PAGE_DEVMAP (_AT(pteval_t, 0))
116#endif
117
118#define _PAGE_PROTNONE (_AT(pteval_t, 1) << _PAGE_BIT_PROTNONE)
119
120
121
122
123
124
125
126#define _PAGE_CHG_MASK (PTE_PFN_MASK | _PAGE_PCD | _PAGE_PWT | \
127 _PAGE_SPECIAL | _PAGE_ACCESSED | _PAGE_DIRTY | \
128 _PAGE_SOFT_DIRTY | _PAGE_DEVMAP | _PAGE_ENC | \
129 _PAGE_UFFD_WP)
130#define _HPAGE_CHG_MASK (_PAGE_CHG_MASK | _PAGE_PSE)
131
132
133
134
135
136
137
138
139
140#ifndef __ASSEMBLY__
141enum page_cache_mode {
142 _PAGE_CACHE_MODE_WB = 0,
143 _PAGE_CACHE_MODE_WC = 1,
144 _PAGE_CACHE_MODE_UC_MINUS = 2,
145 _PAGE_CACHE_MODE_UC = 3,
146 _PAGE_CACHE_MODE_WT = 4,
147 _PAGE_CACHE_MODE_WP = 5,
148
149 _PAGE_CACHE_MODE_NUM = 8
150};
151#endif
152
153#define _PAGE_ENC (_AT(pteval_t, sme_me_mask))
154
155#define _PAGE_CACHE_MASK (_PAGE_PWT | _PAGE_PCD | _PAGE_PAT)
156#define _PAGE_LARGE_CACHE_MASK (_PAGE_PWT | _PAGE_PCD | _PAGE_PAT_LARGE)
157
158#define _PAGE_NOCACHE (cachemode2protval(_PAGE_CACHE_MODE_UC))
159#define _PAGE_CACHE_WP (cachemode2protval(_PAGE_CACHE_MODE_WP))
160
161#define __PP _PAGE_PRESENT
162#define __RW _PAGE_RW
163#define _USR _PAGE_USER
164#define ___A _PAGE_ACCESSED
165#define ___D _PAGE_DIRTY
166#define ___G _PAGE_GLOBAL
167#define __NX _PAGE_NX
168
169#define _ENC _PAGE_ENC
170#define __WP _PAGE_CACHE_WP
171#define __NC _PAGE_NOCACHE
172#define _PSE _PAGE_PSE
173
174#define pgprot_val(x) ((x).pgprot)
175#define __pgprot(x) ((pgprot_t) { (x) } )
176#define __pg(x) __pgprot(x)
177
178#define PAGE_NONE __pg( 0| 0| 0|___A| 0| 0| 0|___G)
179#define PAGE_SHARED __pg(__PP|__RW|_USR|___A|__NX| 0| 0| 0)
180#define PAGE_SHARED_EXEC __pg(__PP|__RW|_USR|___A| 0| 0| 0| 0)
181#define PAGE_COPY_NOEXEC __pg(__PP| 0|_USR|___A|__NX| 0| 0| 0)
182#define PAGE_COPY_EXEC __pg(__PP| 0|_USR|___A| 0| 0| 0| 0)
183#define PAGE_COPY __pg(__PP| 0|_USR|___A|__NX| 0| 0| 0)
184#define PAGE_READONLY __pg(__PP| 0|_USR|___A|__NX| 0| 0| 0)
185#define PAGE_READONLY_EXEC __pg(__PP| 0|_USR|___A| 0| 0| 0| 0)
186
187#define __PAGE_KERNEL (__PP|__RW| 0|___A|__NX|___D| 0|___G)
188#define __PAGE_KERNEL_EXEC (__PP|__RW| 0|___A| 0|___D| 0|___G)
189#define _KERNPG_TABLE_NOENC (__PP|__RW| 0|___A| 0|___D| 0| 0)
190#define _KERNPG_TABLE (__PP|__RW| 0|___A| 0|___D| 0| 0| _ENC)
191#define _PAGE_TABLE_NOENC (__PP|__RW|_USR|___A| 0|___D| 0| 0)
192#define _PAGE_TABLE (__PP|__RW|_USR|___A| 0|___D| 0| 0| _ENC)
193#define __PAGE_KERNEL_RO (__PP| 0| 0|___A|__NX|___D| 0|___G)
194#define __PAGE_KERNEL_ROX (__PP| 0| 0|___A| 0|___D| 0|___G)
195#define __PAGE_KERNEL_NOCACHE (__PP|__RW| 0|___A|__NX|___D| 0|___G| __NC)
196#define __PAGE_KERNEL_VVAR (__PP| 0|_USR|___A|__NX|___D| 0|___G)
197#define __PAGE_KERNEL_LARGE (__PP|__RW| 0|___A|__NX|___D|_PSE|___G)
198#define __PAGE_KERNEL_LARGE_EXEC (__PP|__RW| 0|___A| 0|___D|_PSE|___G)
199#define __PAGE_KERNEL_WP (__PP|__RW| 0|___A|__NX|___D| 0|___G| __WP)
200
201
202#define __PAGE_KERNEL_IO __PAGE_KERNEL
203#define __PAGE_KERNEL_IO_NOCACHE __PAGE_KERNEL_NOCACHE
204
205
206#ifndef __ASSEMBLY__
207
208#define __PAGE_KERNEL_ENC (__PAGE_KERNEL | _ENC)
209#define __PAGE_KERNEL_ENC_WP (__PAGE_KERNEL_WP | _ENC)
210#define __PAGE_KERNEL_NOENC (__PAGE_KERNEL | 0)
211#define __PAGE_KERNEL_NOENC_WP (__PAGE_KERNEL_WP | 0)
212
213#define __pgprot_mask(x) __pgprot((x) & __default_kernel_pte_mask)
214
215#define PAGE_KERNEL __pgprot_mask(__PAGE_KERNEL | _ENC)
216#define PAGE_KERNEL_NOENC __pgprot_mask(__PAGE_KERNEL | 0)
217#define PAGE_KERNEL_RO __pgprot_mask(__PAGE_KERNEL_RO | _ENC)
218#define PAGE_KERNEL_EXEC __pgprot_mask(__PAGE_KERNEL_EXEC | _ENC)
219#define PAGE_KERNEL_EXEC_NOENC __pgprot_mask(__PAGE_KERNEL_EXEC | 0)
220#define PAGE_KERNEL_ROX __pgprot_mask(__PAGE_KERNEL_ROX | _ENC)
221#define PAGE_KERNEL_NOCACHE __pgprot_mask(__PAGE_KERNEL_NOCACHE | _ENC)
222#define PAGE_KERNEL_LARGE __pgprot_mask(__PAGE_KERNEL_LARGE | _ENC)
223#define PAGE_KERNEL_LARGE_EXEC __pgprot_mask(__PAGE_KERNEL_LARGE_EXEC | _ENC)
224#define PAGE_KERNEL_VVAR __pgprot_mask(__PAGE_KERNEL_VVAR | _ENC)
225
226#define PAGE_KERNEL_IO __pgprot_mask(__PAGE_KERNEL_IO)
227#define PAGE_KERNEL_IO_NOCACHE __pgprot_mask(__PAGE_KERNEL_IO_NOCACHE)
228
229#endif
230
231
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
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
257#define PDE_IDENT_ATTR 0x063
258#define PGD_IDENT_ATTR 0x001
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
272#define PTE_PFN_MASK ((pteval_t)PHYSICAL_PAGE_MASK)
273
274
275
276
277
278#define PTE_FLAGS_MASK (~PTE_PFN_MASK)
279
280typedef struct pgprot { pgprotval_t pgprot; } pgprot_t;
281
282typedef struct { pgdval_t pgd; } pgd_t;
283
284static inline pgprot_t pgprot_nx(pgprot_t prot)
285{
286 return __pgprot(pgprot_val(prot) | _PAGE_NX);
287}
288#define pgprot_nx pgprot_nx
289
290#ifdef CONFIG_X86_PAE
291
292
293
294
295
296
297#define PGD_PAE_PAGE_MASK ((signed long)PAGE_MASK)
298#define PGD_PAE_PHYS_MASK (((1ULL << __PHYSICAL_MASK_SHIFT)-1) & PGD_PAE_PAGE_MASK)
299
300
301
302
303
304#define PGD_ALLOWED_BITS (PGD_PAE_PHYS_MASK | _PAGE_PRESENT | \
305 _PAGE_PWT | _PAGE_PCD | \
306 _PAGE_SOFTW1 | _PAGE_SOFTW2 | _PAGE_SOFTW3)
307
308#else
309
310#define PGD_ALLOWED_BITS (~0ULL)
311#endif
312
313static inline pgd_t native_make_pgd(pgdval_t val)
314{
315 return (pgd_t) { val & PGD_ALLOWED_BITS };
316}
317
318static inline pgdval_t native_pgd_val(pgd_t pgd)
319{
320 return pgd.pgd & PGD_ALLOWED_BITS;
321}
322
323static inline pgdval_t pgd_flags(pgd_t pgd)
324{
325 return native_pgd_val(pgd) & PTE_FLAGS_MASK;
326}
327
328#if CONFIG_PGTABLE_LEVELS > 4
329typedef struct { p4dval_t p4d; } p4d_t;
330
331static inline p4d_t native_make_p4d(pudval_t val)
332{
333 return (p4d_t) { val };
334}
335
336static inline p4dval_t native_p4d_val(p4d_t p4d)
337{
338 return p4d.p4d;
339}
340#else
341#include <asm-generic/pgtable-nop4d.h>
342
343static inline p4d_t native_make_p4d(pudval_t val)
344{
345 return (p4d_t) { .pgd = native_make_pgd((pgdval_t)val) };
346}
347
348static inline p4dval_t native_p4d_val(p4d_t p4d)
349{
350 return native_pgd_val(p4d.pgd);
351}
352#endif
353
354#if CONFIG_PGTABLE_LEVELS > 3
355typedef struct { pudval_t pud; } pud_t;
356
357static inline pud_t native_make_pud(pmdval_t val)
358{
359 return (pud_t) { val };
360}
361
362static inline pudval_t native_pud_val(pud_t pud)
363{
364 return pud.pud;
365}
366#else
367#include <asm-generic/pgtable-nopud.h>
368
369static inline pud_t native_make_pud(pudval_t val)
370{
371 return (pud_t) { .p4d.pgd = native_make_pgd(val) };
372}
373
374static inline pudval_t native_pud_val(pud_t pud)
375{
376 return native_pgd_val(pud.p4d.pgd);
377}
378#endif
379
380#if CONFIG_PGTABLE_LEVELS > 2
381typedef struct { pmdval_t pmd; } pmd_t;
382
383static inline pmd_t native_make_pmd(pmdval_t val)
384{
385 return (pmd_t) { val };
386}
387
388static inline pmdval_t native_pmd_val(pmd_t pmd)
389{
390 return pmd.pmd;
391}
392#else
393#include <asm-generic/pgtable-nopmd.h>
394
395static inline pmd_t native_make_pmd(pmdval_t val)
396{
397 return (pmd_t) { .pud.p4d.pgd = native_make_pgd(val) };
398}
399
400static inline pmdval_t native_pmd_val(pmd_t pmd)
401{
402 return native_pgd_val(pmd.pud.p4d.pgd);
403}
404#endif
405
406static inline p4dval_t p4d_pfn_mask(p4d_t p4d)
407{
408
409 return PTE_PFN_MASK;
410}
411
412static inline p4dval_t p4d_flags_mask(p4d_t p4d)
413{
414 return ~p4d_pfn_mask(p4d);
415}
416
417static inline p4dval_t p4d_flags(p4d_t p4d)
418{
419 return native_p4d_val(p4d) & p4d_flags_mask(p4d);
420}
421
422static inline pudval_t pud_pfn_mask(pud_t pud)
423{
424 if (native_pud_val(pud) & _PAGE_PSE)
425 return PHYSICAL_PUD_PAGE_MASK;
426 else
427 return PTE_PFN_MASK;
428}
429
430static inline pudval_t pud_flags_mask(pud_t pud)
431{
432 return ~pud_pfn_mask(pud);
433}
434
435static inline pudval_t pud_flags(pud_t pud)
436{
437 return native_pud_val(pud) & pud_flags_mask(pud);
438}
439
440static inline pmdval_t pmd_pfn_mask(pmd_t pmd)
441{
442 if (native_pmd_val(pmd) & _PAGE_PSE)
443 return PHYSICAL_PMD_PAGE_MASK;
444 else
445 return PTE_PFN_MASK;
446}
447
448static inline pmdval_t pmd_flags_mask(pmd_t pmd)
449{
450 return ~pmd_pfn_mask(pmd);
451}
452
453static inline pmdval_t pmd_flags(pmd_t pmd)
454{
455 return native_pmd_val(pmd) & pmd_flags_mask(pmd);
456}
457
458static inline pte_t native_make_pte(pteval_t val)
459{
460 return (pte_t) { .pte = val };
461}
462
463static inline pteval_t native_pte_val(pte_t pte)
464{
465 return pte.pte;
466}
467
468static inline pteval_t pte_flags(pte_t pte)
469{
470 return native_pte_val(pte) & PTE_FLAGS_MASK;
471}
472
473#define __pte2cm_idx(cb) \
474 ((((cb) >> (_PAGE_BIT_PAT - 2)) & 4) | \
475 (((cb) >> (_PAGE_BIT_PCD - 1)) & 2) | \
476 (((cb) >> _PAGE_BIT_PWT) & 1))
477#define __cm_idx2pte(i) \
478 ((((i) & 4) << (_PAGE_BIT_PAT - 2)) | \
479 (((i) & 2) << (_PAGE_BIT_PCD - 1)) | \
480 (((i) & 1) << _PAGE_BIT_PWT))
481
482unsigned long cachemode2protval(enum page_cache_mode pcm);
483
484static inline pgprotval_t protval_4k_2_large(pgprotval_t val)
485{
486 return (val & ~(_PAGE_PAT | _PAGE_PAT_LARGE)) |
487 ((val & _PAGE_PAT) << (_PAGE_BIT_PAT_LARGE - _PAGE_BIT_PAT));
488}
489static inline pgprot_t pgprot_4k_2_large(pgprot_t pgprot)
490{
491 return __pgprot(protval_4k_2_large(pgprot_val(pgprot)));
492}
493static inline pgprotval_t protval_large_2_4k(pgprotval_t val)
494{
495 return (val & ~(_PAGE_PAT | _PAGE_PAT_LARGE)) |
496 ((val & _PAGE_PAT_LARGE) >>
497 (_PAGE_BIT_PAT_LARGE - _PAGE_BIT_PAT));
498}
499static inline pgprot_t pgprot_large_2_4k(pgprot_t pgprot)
500{
501 return __pgprot(protval_large_2_4k(pgprot_val(pgprot)));
502}
503
504
505typedef struct page *pgtable_t;
506
507extern pteval_t __supported_pte_mask;
508extern pteval_t __default_kernel_pte_mask;
509extern void set_nx(void);
510extern int nx_enabled;
511
512#define pgprot_writecombine pgprot_writecombine
513extern pgprot_t pgprot_writecombine(pgprot_t prot);
514
515#define pgprot_writethrough pgprot_writethrough
516extern pgprot_t pgprot_writethrough(pgprot_t prot);
517
518
519#define __HAVE_PFNMAP_TRACKING
520
521#define __HAVE_PHYS_MEM_ACCESS_PROT
522struct file;
523pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
524 unsigned long size, pgprot_t vma_prot);
525
526
527void set_pte_vaddr(unsigned long vaddr, pte_t pte);
528
529#ifdef CONFIG_X86_32
530extern void native_pagetable_init(void);
531#else
532#define native_pagetable_init paging_init
533#endif
534
535struct seq_file;
536extern void arch_report_meminfo(struct seq_file *m);
537
538enum pg_level {
539 PG_LEVEL_NONE,
540 PG_LEVEL_4K,
541 PG_LEVEL_2M,
542 PG_LEVEL_1G,
543 PG_LEVEL_512G,
544 PG_LEVEL_NUM
545};
546
547#ifdef CONFIG_PROC_FS
548extern void update_page_count(int level, unsigned long pages);
549#else
550static inline void update_page_count(int level, unsigned long pages) { }
551#endif
552
553
554
555
556
557
558
559extern pte_t *lookup_address(unsigned long address, unsigned int *level);
560extern pte_t *lookup_address_in_pgd(pgd_t *pgd, unsigned long address,
561 unsigned int *level);
562
563struct mm_struct;
564extern pte_t *lookup_address_in_mm(struct mm_struct *mm, unsigned long address,
565 unsigned int *level);
566extern pmd_t *lookup_pmd_address(unsigned long address);
567extern phys_addr_t slow_virt_to_phys(void *__address);
568extern int __init kernel_map_pages_in_pgd(pgd_t *pgd, u64 pfn,
569 unsigned long address,
570 unsigned numpages,
571 unsigned long page_flags);
572extern int __init kernel_unmap_pages_in_pgd(pgd_t *pgd, unsigned long address,
573 unsigned long numpages);
574#endif
575
576#endif
577