1
2#ifndef _ASM_X86_PGTABLE_H
3#define _ASM_X86_PGTABLE_H
4
5#include <linux/mem_encrypt.h>
6#include <asm/page.h>
7#include <asm/pgtable_types.h>
8
9
10
11
12#define pgprot_noncached(prot) \
13 ((boot_cpu_data.x86 > 3) \
14 ? (__pgprot(pgprot_val(prot) | \
15 cachemode2protval(_PAGE_CACHE_MODE_UC_MINUS))) \
16 : (prot))
17
18
19
20
21#define pgprot_encrypted(prot) __pgprot(__sme_set(pgprot_val(prot)))
22#define pgprot_decrypted(prot) __pgprot(__sme_clr(pgprot_val(prot)))
23
24#ifndef __ASSEMBLY__
25#include <asm/x86_init.h>
26#include <asm/fpu/xstate.h>
27#include <asm/fpu/api.h>
28#include <asm-generic/pgtable_uffd.h>
29
30extern pgd_t early_top_pgt[PTRS_PER_PGD];
31int __init __early_make_pgtable(unsigned long address, pmdval_t pmd);
32
33void ptdump_walk_pgd_level(struct seq_file *m, struct mm_struct *mm);
34void ptdump_walk_pgd_level_debugfs(struct seq_file *m, struct mm_struct *mm,
35 bool user);
36void ptdump_walk_pgd_level_checkwx(void);
37void ptdump_walk_user_pgd_level_checkwx(void);
38
39#ifdef CONFIG_DEBUG_WX
40#define debug_checkwx() ptdump_walk_pgd_level_checkwx()
41#define debug_checkwx_user() ptdump_walk_user_pgd_level_checkwx()
42#else
43#define debug_checkwx() do { } while (0)
44#define debug_checkwx_user() do { } while (0)
45#endif
46
47
48
49
50
51extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)]
52 __visible;
53#define ZERO_PAGE(vaddr) ((void)(vaddr),virt_to_page(empty_zero_page))
54
55extern spinlock_t pgd_lock;
56extern struct list_head pgd_list;
57
58extern struct mm_struct *pgd_page_get_mm(struct page *page);
59
60extern pmdval_t early_pmd_flags;
61
62#ifdef CONFIG_PARAVIRT_XXL
63#include <asm/paravirt.h>
64#else
65#define set_pte(ptep, pte) native_set_pte(ptep, pte)
66#define set_pte_at(mm, addr, ptep, pte) native_set_pte_at(mm, addr, ptep, pte)
67
68#define set_pte_atomic(ptep, pte) \
69 native_set_pte_atomic(ptep, pte)
70
71#define set_pmd(pmdp, pmd) native_set_pmd(pmdp, pmd)
72
73#ifndef __PAGETABLE_P4D_FOLDED
74#define set_pgd(pgdp, pgd) native_set_pgd(pgdp, pgd)
75#define pgd_clear(pgd) (pgtable_l5_enabled() ? native_pgd_clear(pgd) : 0)
76#endif
77
78#ifndef set_p4d
79# define set_p4d(p4dp, p4d) native_set_p4d(p4dp, p4d)
80#endif
81
82#ifndef __PAGETABLE_PUD_FOLDED
83#define p4d_clear(p4d) native_p4d_clear(p4d)
84#endif
85
86#ifndef set_pud
87# define set_pud(pudp, pud) native_set_pud(pudp, pud)
88#endif
89
90#ifndef __PAGETABLE_PUD_FOLDED
91#define pud_clear(pud) native_pud_clear(pud)
92#endif
93
94#define pte_clear(mm, addr, ptep) native_pte_clear(mm, addr, ptep)
95#define pmd_clear(pmd) native_pmd_clear(pmd)
96
97#define pgd_val(x) native_pgd_val(x)
98#define __pgd(x) native_make_pgd(x)
99
100#ifndef __PAGETABLE_P4D_FOLDED
101#define p4d_val(x) native_p4d_val(x)
102#define __p4d(x) native_make_p4d(x)
103#endif
104
105#ifndef __PAGETABLE_PUD_FOLDED
106#define pud_val(x) native_pud_val(x)
107#define __pud(x) native_make_pud(x)
108#endif
109
110#ifndef __PAGETABLE_PMD_FOLDED
111#define pmd_val(x) native_pmd_val(x)
112#define __pmd(x) native_make_pmd(x)
113#endif
114
115#define pte_val(x) native_pte_val(x)
116#define __pte(x) native_make_pte(x)
117
118#define arch_end_context_switch(prev) do {} while(0)
119#endif
120
121
122
123
124
125static inline int pte_dirty(pte_t pte)
126{
127 return pte_flags(pte) & _PAGE_DIRTY;
128}
129
130
131static inline u32 read_pkru(void)
132{
133 if (boot_cpu_has(X86_FEATURE_OSPKE))
134 return rdpkru();
135 return 0;
136}
137
138static inline void write_pkru(u32 pkru)
139{
140 struct pkru_state *pk;
141
142 if (!boot_cpu_has(X86_FEATURE_OSPKE))
143 return;
144
145 pk = get_xsave_addr(¤t->thread.fpu.state.xsave, XFEATURE_PKRU);
146
147
148
149
150
151
152 fpregs_lock();
153 if (pk)
154 pk->pkru = pkru;
155 __write_pkru(pkru);
156 fpregs_unlock();
157}
158
159static inline int pte_young(pte_t pte)
160{
161 return pte_flags(pte) & _PAGE_ACCESSED;
162}
163
164static inline int pmd_dirty(pmd_t pmd)
165{
166 return pmd_flags(pmd) & _PAGE_DIRTY;
167}
168
169static inline int pmd_young(pmd_t pmd)
170{
171 return pmd_flags(pmd) & _PAGE_ACCESSED;
172}
173
174static inline int pud_dirty(pud_t pud)
175{
176 return pud_flags(pud) & _PAGE_DIRTY;
177}
178
179static inline int pud_young(pud_t pud)
180{
181 return pud_flags(pud) & _PAGE_ACCESSED;
182}
183
184static inline int pte_write(pte_t pte)
185{
186 return pte_flags(pte) & _PAGE_RW;
187}
188
189static inline int pte_huge(pte_t pte)
190{
191 return pte_flags(pte) & _PAGE_PSE;
192}
193
194static inline int pte_global(pte_t pte)
195{
196 return pte_flags(pte) & _PAGE_GLOBAL;
197}
198
199static inline int pte_exec(pte_t pte)
200{
201 return !(pte_flags(pte) & _PAGE_NX);
202}
203
204static inline int pte_special(pte_t pte)
205{
206 return pte_flags(pte) & _PAGE_SPECIAL;
207}
208
209
210
211static inline u64 protnone_mask(u64 val);
212
213static inline unsigned long pte_pfn(pte_t pte)
214{
215 phys_addr_t pfn = pte_val(pte);
216 pfn ^= protnone_mask(pfn);
217 return (pfn & PTE_PFN_MASK) >> PAGE_SHIFT;
218}
219
220static inline unsigned long pmd_pfn(pmd_t pmd)
221{
222 phys_addr_t pfn = pmd_val(pmd);
223 pfn ^= protnone_mask(pfn);
224 return (pfn & pmd_pfn_mask(pmd)) >> PAGE_SHIFT;
225}
226
227static inline unsigned long pud_pfn(pud_t pud)
228{
229 phys_addr_t pfn = pud_val(pud);
230 pfn ^= protnone_mask(pfn);
231 return (pfn & pud_pfn_mask(pud)) >> PAGE_SHIFT;
232}
233
234static inline unsigned long p4d_pfn(p4d_t p4d)
235{
236 return (p4d_val(p4d) & p4d_pfn_mask(p4d)) >> PAGE_SHIFT;
237}
238
239static inline unsigned long pgd_pfn(pgd_t pgd)
240{
241 return (pgd_val(pgd) & PTE_PFN_MASK) >> PAGE_SHIFT;
242}
243
244#define p4d_leaf p4d_large
245static inline int p4d_large(p4d_t p4d)
246{
247
248 return 0;
249}
250
251#define pte_page(pte) pfn_to_page(pte_pfn(pte))
252
253#define pmd_leaf pmd_large
254static inline int pmd_large(pmd_t pte)
255{
256 return pmd_flags(pte) & _PAGE_PSE;
257}
258
259#ifdef CONFIG_TRANSPARENT_HUGEPAGE
260static inline int pmd_trans_huge(pmd_t pmd)
261{
262 return (pmd_val(pmd) & (_PAGE_PSE|_PAGE_DEVMAP)) == _PAGE_PSE;
263}
264
265#ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD
266static inline int pud_trans_huge(pud_t pud)
267{
268 return (pud_val(pud) & (_PAGE_PSE|_PAGE_DEVMAP)) == _PAGE_PSE;
269}
270#endif
271
272#define has_transparent_hugepage has_transparent_hugepage
273static inline int has_transparent_hugepage(void)
274{
275 return boot_cpu_has(X86_FEATURE_PSE);
276}
277
278#ifdef CONFIG_ARCH_HAS_PTE_DEVMAP
279static inline int pmd_devmap(pmd_t pmd)
280{
281 return !!(pmd_val(pmd) & _PAGE_DEVMAP);
282}
283
284#ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD
285static inline int pud_devmap(pud_t pud)
286{
287 return !!(pud_val(pud) & _PAGE_DEVMAP);
288}
289#else
290static inline int pud_devmap(pud_t pud)
291{
292 return 0;
293}
294#endif
295
296static inline int pgd_devmap(pgd_t pgd)
297{
298 return 0;
299}
300#endif
301#endif
302
303static inline pte_t pte_set_flags(pte_t pte, pteval_t set)
304{
305 pteval_t v = native_pte_val(pte);
306
307 return native_make_pte(v | set);
308}
309
310static inline pte_t pte_clear_flags(pte_t pte, pteval_t clear)
311{
312 pteval_t v = native_pte_val(pte);
313
314 return native_make_pte(v & ~clear);
315}
316
317#ifdef CONFIG_HAVE_ARCH_USERFAULTFD_WP
318static inline int pte_uffd_wp(pte_t pte)
319{
320 return pte_flags(pte) & _PAGE_UFFD_WP;
321}
322
323static inline pte_t pte_mkuffd_wp(pte_t pte)
324{
325 return pte_set_flags(pte, _PAGE_UFFD_WP);
326}
327
328static inline pte_t pte_clear_uffd_wp(pte_t pte)
329{
330 return pte_clear_flags(pte, _PAGE_UFFD_WP);
331}
332#endif
333
334static inline pte_t pte_mkclean(pte_t pte)
335{
336 return pte_clear_flags(pte, _PAGE_DIRTY);
337}
338
339static inline pte_t pte_mkold(pte_t pte)
340{
341 return pte_clear_flags(pte, _PAGE_ACCESSED);
342}
343
344static inline pte_t pte_wrprotect(pte_t pte)
345{
346 return pte_clear_flags(pte, _PAGE_RW);
347}
348
349static inline pte_t pte_mkexec(pte_t pte)
350{
351 return pte_clear_flags(pte, _PAGE_NX);
352}
353
354static inline pte_t pte_mkdirty(pte_t pte)
355{
356 return pte_set_flags(pte, _PAGE_DIRTY | _PAGE_SOFT_DIRTY);
357}
358
359static inline pte_t pte_mkyoung(pte_t pte)
360{
361 return pte_set_flags(pte, _PAGE_ACCESSED);
362}
363
364static inline pte_t pte_mkwrite(pte_t pte)
365{
366 return pte_set_flags(pte, _PAGE_RW);
367}
368
369static inline pte_t pte_mkhuge(pte_t pte)
370{
371 return pte_set_flags(pte, _PAGE_PSE);
372}
373
374static inline pte_t pte_clrhuge(pte_t pte)
375{
376 return pte_clear_flags(pte, _PAGE_PSE);
377}
378
379static inline pte_t pte_mkglobal(pte_t pte)
380{
381 return pte_set_flags(pte, _PAGE_GLOBAL);
382}
383
384static inline pte_t pte_clrglobal(pte_t pte)
385{
386 return pte_clear_flags(pte, _PAGE_GLOBAL);
387}
388
389static inline pte_t pte_mkspecial(pte_t pte)
390{
391 return pte_set_flags(pte, _PAGE_SPECIAL);
392}
393
394static inline pte_t pte_mkdevmap(pte_t pte)
395{
396 return pte_set_flags(pte, _PAGE_SPECIAL|_PAGE_DEVMAP);
397}
398
399static inline pmd_t pmd_set_flags(pmd_t pmd, pmdval_t set)
400{
401 pmdval_t v = native_pmd_val(pmd);
402
403 return native_make_pmd(v | set);
404}
405
406static inline pmd_t pmd_clear_flags(pmd_t pmd, pmdval_t clear)
407{
408 pmdval_t v = native_pmd_val(pmd);
409
410 return native_make_pmd(v & ~clear);
411}
412
413#ifdef CONFIG_HAVE_ARCH_USERFAULTFD_WP
414static inline int pmd_uffd_wp(pmd_t pmd)
415{
416 return pmd_flags(pmd) & _PAGE_UFFD_WP;
417}
418
419static inline pmd_t pmd_mkuffd_wp(pmd_t pmd)
420{
421 return pmd_set_flags(pmd, _PAGE_UFFD_WP);
422}
423
424static inline pmd_t pmd_clear_uffd_wp(pmd_t pmd)
425{
426 return pmd_clear_flags(pmd, _PAGE_UFFD_WP);
427}
428#endif
429
430static inline pmd_t pmd_mkold(pmd_t pmd)
431{
432 return pmd_clear_flags(pmd, _PAGE_ACCESSED);
433}
434
435static inline pmd_t pmd_mkclean(pmd_t pmd)
436{
437 return pmd_clear_flags(pmd, _PAGE_DIRTY);
438}
439
440static inline pmd_t pmd_wrprotect(pmd_t pmd)
441{
442 return pmd_clear_flags(pmd, _PAGE_RW);
443}
444
445static inline pmd_t pmd_mkdirty(pmd_t pmd)
446{
447 return pmd_set_flags(pmd, _PAGE_DIRTY | _PAGE_SOFT_DIRTY);
448}
449
450static inline pmd_t pmd_mkdevmap(pmd_t pmd)
451{
452 return pmd_set_flags(pmd, _PAGE_DEVMAP);
453}
454
455static inline pmd_t pmd_mkhuge(pmd_t pmd)
456{
457 return pmd_set_flags(pmd, _PAGE_PSE);
458}
459
460static inline pmd_t pmd_mkyoung(pmd_t pmd)
461{
462 return pmd_set_flags(pmd, _PAGE_ACCESSED);
463}
464
465static inline pmd_t pmd_mkwrite(pmd_t pmd)
466{
467 return pmd_set_flags(pmd, _PAGE_RW);
468}
469
470static inline pud_t pud_set_flags(pud_t pud, pudval_t set)
471{
472 pudval_t v = native_pud_val(pud);
473
474 return native_make_pud(v | set);
475}
476
477static inline pud_t pud_clear_flags(pud_t pud, pudval_t clear)
478{
479 pudval_t v = native_pud_val(pud);
480
481 return native_make_pud(v & ~clear);
482}
483
484static inline pud_t pud_mkold(pud_t pud)
485{
486 return pud_clear_flags(pud, _PAGE_ACCESSED);
487}
488
489static inline pud_t pud_mkclean(pud_t pud)
490{
491 return pud_clear_flags(pud, _PAGE_DIRTY);
492}
493
494static inline pud_t pud_wrprotect(pud_t pud)
495{
496 return pud_clear_flags(pud, _PAGE_RW);
497}
498
499static inline pud_t pud_mkdirty(pud_t pud)
500{
501 return pud_set_flags(pud, _PAGE_DIRTY | _PAGE_SOFT_DIRTY);
502}
503
504static inline pud_t pud_mkdevmap(pud_t pud)
505{
506 return pud_set_flags(pud, _PAGE_DEVMAP);
507}
508
509static inline pud_t pud_mkhuge(pud_t pud)
510{
511 return pud_set_flags(pud, _PAGE_PSE);
512}
513
514static inline pud_t pud_mkyoung(pud_t pud)
515{
516 return pud_set_flags(pud, _PAGE_ACCESSED);
517}
518
519static inline pud_t pud_mkwrite(pud_t pud)
520{
521 return pud_set_flags(pud, _PAGE_RW);
522}
523
524#ifdef CONFIG_HAVE_ARCH_SOFT_DIRTY
525static inline int pte_soft_dirty(pte_t pte)
526{
527 return pte_flags(pte) & _PAGE_SOFT_DIRTY;
528}
529
530static inline int pmd_soft_dirty(pmd_t pmd)
531{
532 return pmd_flags(pmd) & _PAGE_SOFT_DIRTY;
533}
534
535static inline int pud_soft_dirty(pud_t pud)
536{
537 return pud_flags(pud) & _PAGE_SOFT_DIRTY;
538}
539
540static inline pte_t pte_mksoft_dirty(pte_t pte)
541{
542 return pte_set_flags(pte, _PAGE_SOFT_DIRTY);
543}
544
545static inline pmd_t pmd_mksoft_dirty(pmd_t pmd)
546{
547 return pmd_set_flags(pmd, _PAGE_SOFT_DIRTY);
548}
549
550static inline pud_t pud_mksoft_dirty(pud_t pud)
551{
552 return pud_set_flags(pud, _PAGE_SOFT_DIRTY);
553}
554
555static inline pte_t pte_clear_soft_dirty(pte_t pte)
556{
557 return pte_clear_flags(pte, _PAGE_SOFT_DIRTY);
558}
559
560static inline pmd_t pmd_clear_soft_dirty(pmd_t pmd)
561{
562 return pmd_clear_flags(pmd, _PAGE_SOFT_DIRTY);
563}
564
565static inline pud_t pud_clear_soft_dirty(pud_t pud)
566{
567 return pud_clear_flags(pud, _PAGE_SOFT_DIRTY);
568}
569
570#endif
571
572
573
574
575
576static inline pgprotval_t massage_pgprot(pgprot_t pgprot)
577{
578 pgprotval_t protval = pgprot_val(pgprot);
579
580 if (protval & _PAGE_PRESENT)
581 protval &= __supported_pte_mask;
582
583 return protval;
584}
585
586static inline pgprotval_t check_pgprot(pgprot_t pgprot)
587{
588 pgprotval_t massaged_val = massage_pgprot(pgprot);
589
590
591#ifdef CONFIG_DEBUG_VM
592 WARN_ONCE(pgprot_val(pgprot) != massaged_val,
593 "attempted to set unsupported pgprot: %016llx "
594 "bits: %016llx supported: %016llx\n",
595 (u64)pgprot_val(pgprot),
596 (u64)pgprot_val(pgprot) ^ massaged_val,
597 (u64)__supported_pte_mask);
598#endif
599
600 return massaged_val;
601}
602
603static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot)
604{
605 phys_addr_t pfn = (phys_addr_t)page_nr << PAGE_SHIFT;
606 pfn ^= protnone_mask(pgprot_val(pgprot));
607 pfn &= PTE_PFN_MASK;
608 return __pte(pfn | check_pgprot(pgprot));
609}
610
611static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot)
612{
613 phys_addr_t pfn = (phys_addr_t)page_nr << PAGE_SHIFT;
614 pfn ^= protnone_mask(pgprot_val(pgprot));
615 pfn &= PHYSICAL_PMD_PAGE_MASK;
616 return __pmd(pfn | check_pgprot(pgprot));
617}
618
619static inline pud_t pfn_pud(unsigned long page_nr, pgprot_t pgprot)
620{
621 phys_addr_t pfn = (phys_addr_t)page_nr << PAGE_SHIFT;
622 pfn ^= protnone_mask(pgprot_val(pgprot));
623 pfn &= PHYSICAL_PUD_PAGE_MASK;
624 return __pud(pfn | check_pgprot(pgprot));
625}
626
627static inline pmd_t pmd_mknotpresent(pmd_t pmd)
628{
629 return pfn_pmd(pmd_pfn(pmd),
630 __pgprot(pmd_flags(pmd) & ~(_PAGE_PRESENT|_PAGE_PROTNONE)));
631}
632
633static inline u64 flip_protnone_guard(u64 oldval, u64 val, u64 mask);
634
635static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
636{
637 pteval_t val = pte_val(pte), oldval = val;
638
639
640
641
642
643 val &= _PAGE_CHG_MASK;
644 val |= check_pgprot(newprot) & ~_PAGE_CHG_MASK;
645 val = flip_protnone_guard(oldval, val, PTE_PFN_MASK);
646 return __pte(val);
647}
648
649static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
650{
651 pmdval_t val = pmd_val(pmd), oldval = val;
652
653 val &= _HPAGE_CHG_MASK;
654 val |= check_pgprot(newprot) & ~_HPAGE_CHG_MASK;
655 val = flip_protnone_guard(oldval, val, PHYSICAL_PMD_PAGE_MASK);
656 return __pmd(val);
657}
658
659
660
661
662
663#define pgprot_modify pgprot_modify
664static inline pgprot_t pgprot_modify(pgprot_t oldprot, pgprot_t newprot)
665{
666 pgprotval_t preservebits = pgprot_val(oldprot) & _PAGE_CHG_MASK;
667 pgprotval_t addbits = pgprot_val(newprot) & ~_PAGE_CHG_MASK;
668 return __pgprot(preservebits | addbits);
669}
670
671#define pte_pgprot(x) __pgprot(pte_flags(x))
672#define pmd_pgprot(x) __pgprot(pmd_flags(x))
673#define pud_pgprot(x) __pgprot(pud_flags(x))
674#define p4d_pgprot(x) __pgprot(p4d_flags(x))
675
676#define canon_pgprot(p) __pgprot(massage_pgprot(p))
677
678static inline pgprot_t arch_filter_pgprot(pgprot_t prot)
679{
680 return canon_pgprot(prot);
681}
682
683static inline int is_new_memtype_allowed(u64 paddr, unsigned long size,
684 enum page_cache_mode pcm,
685 enum page_cache_mode new_pcm)
686{
687
688
689
690 if (x86_platform.is_untracked_pat_range(paddr, paddr + size))
691 return 1;
692
693
694
695
696
697
698
699
700
701 if ((pcm == _PAGE_CACHE_MODE_UC_MINUS &&
702 new_pcm == _PAGE_CACHE_MODE_WB) ||
703 (pcm == _PAGE_CACHE_MODE_WC &&
704 new_pcm == _PAGE_CACHE_MODE_WB) ||
705 (pcm == _PAGE_CACHE_MODE_WT &&
706 new_pcm == _PAGE_CACHE_MODE_WB) ||
707 (pcm == _PAGE_CACHE_MODE_WT &&
708 new_pcm == _PAGE_CACHE_MODE_WC)) {
709 return 0;
710 }
711
712 return 1;
713}
714
715pmd_t *populate_extra_pmd(unsigned long vaddr);
716pte_t *populate_extra_pte(unsigned long vaddr);
717
718#ifdef CONFIG_PAGE_TABLE_ISOLATION
719pgd_t __pti_set_user_pgtbl(pgd_t *pgdp, pgd_t pgd);
720
721
722
723
724
725
726static inline pgd_t pti_set_user_pgtbl(pgd_t *pgdp, pgd_t pgd)
727{
728 if (!static_cpu_has(X86_FEATURE_PTI))
729 return pgd;
730 return __pti_set_user_pgtbl(pgdp, pgd);
731}
732#else
733static inline pgd_t pti_set_user_pgtbl(pgd_t *pgdp, pgd_t pgd)
734{
735 return pgd;
736}
737#endif
738
739#endif
740
741
742#ifdef CONFIG_X86_32
743# include <asm/pgtable_32.h>
744#else
745# include <asm/pgtable_64.h>
746#endif
747
748#ifndef __ASSEMBLY__
749#include <linux/mm_types.h>
750#include <linux/mmdebug.h>
751#include <linux/log2.h>
752#include <asm/fixmap.h>
753
754static inline int pte_none(pte_t pte)
755{
756 return !(pte.pte & ~(_PAGE_KNL_ERRATUM_MASK));
757}
758
759#define __HAVE_ARCH_PTE_SAME
760static inline int pte_same(pte_t a, pte_t b)
761{
762 return a.pte == b.pte;
763}
764
765static inline int pte_present(pte_t a)
766{
767 return pte_flags(a) & (_PAGE_PRESENT | _PAGE_PROTNONE);
768}
769
770#ifdef CONFIG_ARCH_HAS_PTE_DEVMAP
771static inline int pte_devmap(pte_t a)
772{
773 return (pte_flags(a) & _PAGE_DEVMAP) == _PAGE_DEVMAP;
774}
775#endif
776
777#define pte_accessible pte_accessible
778static inline bool pte_accessible(struct mm_struct *mm, pte_t a)
779{
780 if (pte_flags(a) & _PAGE_PRESENT)
781 return true;
782
783 if ((pte_flags(a) & _PAGE_PROTNONE) &&
784 mm_tlb_flush_pending(mm))
785 return true;
786
787 return false;
788}
789
790static inline int pmd_present(pmd_t pmd)
791{
792
793
794
795
796
797
798 return pmd_flags(pmd) & (_PAGE_PRESENT | _PAGE_PROTNONE | _PAGE_PSE);
799}
800
801#ifdef CONFIG_NUMA_BALANCING
802
803
804
805
806static inline int pte_protnone(pte_t pte)
807{
808 return (pte_flags(pte) & (_PAGE_PROTNONE | _PAGE_PRESENT))
809 == _PAGE_PROTNONE;
810}
811
812static inline int pmd_protnone(pmd_t pmd)
813{
814 return (pmd_flags(pmd) & (_PAGE_PROTNONE | _PAGE_PRESENT))
815 == _PAGE_PROTNONE;
816}
817#endif
818
819static inline int pmd_none(pmd_t pmd)
820{
821
822
823 unsigned long val = native_pmd_val(pmd);
824 return (val & ~_PAGE_KNL_ERRATUM_MASK) == 0;
825}
826
827static inline unsigned long pmd_page_vaddr(pmd_t pmd)
828{
829 return (unsigned long)__va(pmd_val(pmd) & pmd_pfn_mask(pmd));
830}
831
832
833
834
835
836#define pmd_page(pmd) pfn_to_page(pmd_pfn(pmd))
837
838
839
840
841
842
843
844static inline unsigned long pmd_index(unsigned long address)
845{
846 return (address >> PMD_SHIFT) & (PTRS_PER_PMD - 1);
847}
848
849
850
851
852
853
854
855
856#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
857
858
859
860
861
862
863
864
865
866#define pte_index pte_index
867static inline unsigned long pte_index(unsigned long address)
868{
869 return (address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1);
870}
871
872static inline pte_t *pte_offset_kernel(pmd_t *pmd, unsigned long address)
873{
874 return (pte_t *)pmd_page_vaddr(*pmd) + pte_index(address);
875}
876
877static inline int pmd_bad(pmd_t pmd)
878{
879 return (pmd_flags(pmd) & ~_PAGE_USER) != _KERNPG_TABLE;
880}
881
882static inline unsigned long pages_to_mb(unsigned long npg)
883{
884 return npg >> (20 - PAGE_SHIFT);
885}
886
887#if CONFIG_PGTABLE_LEVELS > 2
888static inline int pud_none(pud_t pud)
889{
890 return (native_pud_val(pud) & ~(_PAGE_KNL_ERRATUM_MASK)) == 0;
891}
892
893static inline int pud_present(pud_t pud)
894{
895 return pud_flags(pud) & _PAGE_PRESENT;
896}
897
898static inline unsigned long pud_page_vaddr(pud_t pud)
899{
900 return (unsigned long)__va(pud_val(pud) & pud_pfn_mask(pud));
901}
902
903
904
905
906
907#define pud_page(pud) pfn_to_page(pud_pfn(pud))
908
909
910static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address)
911{
912 return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(address);
913}
914
915#define pud_leaf pud_large
916static inline int pud_large(pud_t pud)
917{
918 return (pud_val(pud) & (_PAGE_PSE | _PAGE_PRESENT)) ==
919 (_PAGE_PSE | _PAGE_PRESENT);
920}
921
922static inline int pud_bad(pud_t pud)
923{
924 return (pud_flags(pud) & ~(_KERNPG_TABLE | _PAGE_USER)) != 0;
925}
926#else
927#define pud_leaf pud_large
928static inline int pud_large(pud_t pud)
929{
930 return 0;
931}
932#endif
933
934static inline unsigned long pud_index(unsigned long address)
935{
936 return (address >> PUD_SHIFT) & (PTRS_PER_PUD - 1);
937}
938
939#if CONFIG_PGTABLE_LEVELS > 3
940static inline int p4d_none(p4d_t p4d)
941{
942 return (native_p4d_val(p4d) & ~(_PAGE_KNL_ERRATUM_MASK)) == 0;
943}
944
945static inline int p4d_present(p4d_t p4d)
946{
947 return p4d_flags(p4d) & _PAGE_PRESENT;
948}
949
950static inline unsigned long p4d_page_vaddr(p4d_t p4d)
951{
952 return (unsigned long)__va(p4d_val(p4d) & p4d_pfn_mask(p4d));
953}
954
955
956
957
958
959#define p4d_page(p4d) pfn_to_page(p4d_pfn(p4d))
960
961
962static inline pud_t *pud_offset(p4d_t *p4d, unsigned long address)
963{
964 return (pud_t *)p4d_page_vaddr(*p4d) + pud_index(address);
965}
966
967static inline int p4d_bad(p4d_t p4d)
968{
969 unsigned long ignore_flags = _KERNPG_TABLE | _PAGE_USER;
970
971 if (IS_ENABLED(CONFIG_PAGE_TABLE_ISOLATION))
972 ignore_flags |= _PAGE_NX;
973
974 return (p4d_flags(p4d) & ~ignore_flags) != 0;
975}
976#endif
977
978static inline unsigned long p4d_index(unsigned long address)
979{
980 return (address >> P4D_SHIFT) & (PTRS_PER_P4D - 1);
981}
982
983#if CONFIG_PGTABLE_LEVELS > 4
984static inline int pgd_present(pgd_t pgd)
985{
986 if (!pgtable_l5_enabled())
987 return 1;
988 return pgd_flags(pgd) & _PAGE_PRESENT;
989}
990
991static inline unsigned long pgd_page_vaddr(pgd_t pgd)
992{
993 return (unsigned long)__va((unsigned long)pgd_val(pgd) & PTE_PFN_MASK);
994}
995
996
997
998
999
1000#define pgd_page(pgd) pfn_to_page(pgd_pfn(pgd))
1001
1002
1003static inline p4d_t *p4d_offset(pgd_t *pgd, unsigned long address)
1004{
1005 if (!pgtable_l5_enabled())
1006 return (p4d_t *)pgd;
1007 return (p4d_t *)pgd_page_vaddr(*pgd) + p4d_index(address);
1008}
1009
1010static inline int pgd_bad(pgd_t pgd)
1011{
1012 unsigned long ignore_flags = _PAGE_USER;
1013
1014 if (!pgtable_l5_enabled())
1015 return 0;
1016
1017 if (IS_ENABLED(CONFIG_PAGE_TABLE_ISOLATION))
1018 ignore_flags |= _PAGE_NX;
1019
1020 return (pgd_flags(pgd) & ~ignore_flags) != _KERNPG_TABLE;
1021}
1022
1023static inline int pgd_none(pgd_t pgd)
1024{
1025 if (!pgtable_l5_enabled())
1026 return 0;
1027
1028
1029
1030
1031
1032
1033 return !native_pgd_val(pgd);
1034}
1035#endif
1036
1037#endif
1038
1039
1040
1041
1042
1043
1044
1045#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))
1046
1047
1048
1049
1050
1051#define pgd_offset_pgd(pgd, address) (pgd + pgd_index((address)))
1052
1053
1054
1055#define pgd_offset(mm, address) pgd_offset_pgd((mm)->pgd, (address))
1056
1057
1058
1059
1060#define pgd_offset_k(address) pgd_offset(&init_mm, (address))
1061
1062
1063#define KERNEL_PGD_BOUNDARY pgd_index(PAGE_OFFSET)
1064#define KERNEL_PGD_PTRS (PTRS_PER_PGD - KERNEL_PGD_BOUNDARY)
1065
1066#ifndef __ASSEMBLY__
1067
1068extern int direct_gbpages;
1069void init_mem_mapping(void);
1070void early_alloc_pgt_buf(void);
1071extern void memblock_find_dma_reserve(void);
1072
1073#ifdef CONFIG_X86_64
1074
1075extern pgd_t trampoline_pgd_entry;
1076static inline void __meminit init_trampoline_default(void)
1077{
1078
1079 trampoline_pgd_entry = init_top_pgt[pgd_index(__PAGE_OFFSET)];
1080}
1081
1082void __init poking_init(void);
1083
1084unsigned long init_memory_mapping(unsigned long start,
1085 unsigned long end, pgprot_t prot);
1086
1087# ifdef CONFIG_RANDOMIZE_MEMORY
1088void __meminit init_trampoline(void);
1089# else
1090# define init_trampoline init_trampoline_default
1091# endif
1092#else
1093static inline void init_trampoline(void) { }
1094#endif
1095
1096
1097static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep)
1098{
1099 pte_t res = *ptep;
1100
1101
1102 native_pte_clear(NULL, 0, ptep);
1103 return res;
1104}
1105
1106static inline pmd_t native_local_pmdp_get_and_clear(pmd_t *pmdp)
1107{
1108 pmd_t res = *pmdp;
1109
1110 native_pmd_clear(pmdp);
1111 return res;
1112}
1113
1114static inline pud_t native_local_pudp_get_and_clear(pud_t *pudp)
1115{
1116 pud_t res = *pudp;
1117
1118 native_pud_clear(pudp);
1119 return res;
1120}
1121
1122static inline void native_set_pte_at(struct mm_struct *mm, unsigned long addr,
1123 pte_t *ptep , pte_t pte)
1124{
1125 native_set_pte(ptep, pte);
1126}
1127
1128static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr,
1129 pmd_t *pmdp, pmd_t pmd)
1130{
1131 set_pmd(pmdp, pmd);
1132}
1133
1134static inline void set_pud_at(struct mm_struct *mm, unsigned long addr,
1135 pud_t *pudp, pud_t pud)
1136{
1137 native_set_pud(pudp, pud);
1138}
1139
1140
1141
1142
1143
1144
1145
1146
1147struct vm_area_struct;
1148
1149#define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
1150extern int ptep_set_access_flags(struct vm_area_struct *vma,
1151 unsigned long address, pte_t *ptep,
1152 pte_t entry, int dirty);
1153
1154#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
1155extern int ptep_test_and_clear_young(struct vm_area_struct *vma,
1156 unsigned long addr, pte_t *ptep);
1157
1158#define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH
1159extern int ptep_clear_flush_young(struct vm_area_struct *vma,
1160 unsigned long address, pte_t *ptep);
1161
1162#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
1163static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
1164 pte_t *ptep)
1165{
1166 pte_t pte = native_ptep_get_and_clear(ptep);
1167 return pte;
1168}
1169
1170#define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL
1171static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm,
1172 unsigned long addr, pte_t *ptep,
1173 int full)
1174{
1175 pte_t pte;
1176 if (full) {
1177
1178
1179
1180
1181 pte = native_local_ptep_get_and_clear(ptep);
1182 } else {
1183 pte = ptep_get_and_clear(mm, addr, ptep);
1184 }
1185 return pte;
1186}
1187
1188#define __HAVE_ARCH_PTEP_SET_WRPROTECT
1189static inline void ptep_set_wrprotect(struct mm_struct *mm,
1190 unsigned long addr, pte_t *ptep)
1191{
1192 clear_bit(_PAGE_BIT_RW, (unsigned long *)&ptep->pte);
1193}
1194
1195#define flush_tlb_fix_spurious_fault(vma, address) do { } while (0)
1196
1197#define mk_pmd(page, pgprot) pfn_pmd(page_to_pfn(page), (pgprot))
1198
1199#define __HAVE_ARCH_PMDP_SET_ACCESS_FLAGS
1200extern int pmdp_set_access_flags(struct vm_area_struct *vma,
1201 unsigned long address, pmd_t *pmdp,
1202 pmd_t entry, int dirty);
1203extern int pudp_set_access_flags(struct vm_area_struct *vma,
1204 unsigned long address, pud_t *pudp,
1205 pud_t entry, int dirty);
1206
1207#define __HAVE_ARCH_PMDP_TEST_AND_CLEAR_YOUNG
1208extern int pmdp_test_and_clear_young(struct vm_area_struct *vma,
1209 unsigned long addr, pmd_t *pmdp);
1210extern int pudp_test_and_clear_young(struct vm_area_struct *vma,
1211 unsigned long addr, pud_t *pudp);
1212
1213#define __HAVE_ARCH_PMDP_CLEAR_YOUNG_FLUSH
1214extern int pmdp_clear_flush_young(struct vm_area_struct *vma,
1215 unsigned long address, pmd_t *pmdp);
1216
1217
1218#define pmd_write pmd_write
1219static inline int pmd_write(pmd_t pmd)
1220{
1221 return pmd_flags(pmd) & _PAGE_RW;
1222}
1223
1224#define __HAVE_ARCH_PMDP_HUGE_GET_AND_CLEAR
1225static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm, unsigned long addr,
1226 pmd_t *pmdp)
1227{
1228 return native_pmdp_get_and_clear(pmdp);
1229}
1230
1231#define __HAVE_ARCH_PUDP_HUGE_GET_AND_CLEAR
1232static inline pud_t pudp_huge_get_and_clear(struct mm_struct *mm,
1233 unsigned long addr, pud_t *pudp)
1234{
1235 return native_pudp_get_and_clear(pudp);
1236}
1237
1238#define __HAVE_ARCH_PMDP_SET_WRPROTECT
1239static inline void pmdp_set_wrprotect(struct mm_struct *mm,
1240 unsigned long addr, pmd_t *pmdp)
1241{
1242 clear_bit(_PAGE_BIT_RW, (unsigned long *)pmdp);
1243}
1244
1245#define pud_write pud_write
1246static inline int pud_write(pud_t pud)
1247{
1248 return pud_flags(pud) & _PAGE_RW;
1249}
1250
1251#ifndef pmdp_establish
1252#define pmdp_establish pmdp_establish
1253static inline pmd_t pmdp_establish(struct vm_area_struct *vma,
1254 unsigned long address, pmd_t *pmdp, pmd_t pmd)
1255{
1256 if (IS_ENABLED(CONFIG_SMP)) {
1257 return xchg(pmdp, pmd);
1258 } else {
1259 pmd_t old = *pmdp;
1260 WRITE_ONCE(*pmdp, pmd);
1261 return old;
1262 }
1263}
1264#endif
1265
1266
1267
1268
1269
1270
1271
1272static inline bool pgdp_maps_userspace(void *__ptr)
1273{
1274 unsigned long ptr = (unsigned long)__ptr;
1275
1276 return (((ptr & ~PAGE_MASK) / sizeof(pgd_t)) < PGD_KERNEL_START);
1277}
1278
1279#define pgd_leaf pgd_large
1280static inline int pgd_large(pgd_t pgd) { return 0; }
1281
1282#ifdef CONFIG_PAGE_TABLE_ISOLATION
1283
1284
1285
1286
1287
1288
1289#define PTI_PGTABLE_SWITCH_BIT PAGE_SHIFT
1290
1291
1292
1293
1294
1295static inline void *ptr_set_bit(void *ptr, int bit)
1296{
1297 unsigned long __ptr = (unsigned long)ptr;
1298
1299 __ptr |= BIT(bit);
1300 return (void *)__ptr;
1301}
1302static inline void *ptr_clear_bit(void *ptr, int bit)
1303{
1304 unsigned long __ptr = (unsigned long)ptr;
1305
1306 __ptr &= ~BIT(bit);
1307 return (void *)__ptr;
1308}
1309
1310static inline pgd_t *kernel_to_user_pgdp(pgd_t *pgdp)
1311{
1312 return ptr_set_bit(pgdp, PTI_PGTABLE_SWITCH_BIT);
1313}
1314
1315static inline pgd_t *user_to_kernel_pgdp(pgd_t *pgdp)
1316{
1317 return ptr_clear_bit(pgdp, PTI_PGTABLE_SWITCH_BIT);
1318}
1319
1320static inline p4d_t *kernel_to_user_p4dp(p4d_t *p4dp)
1321{
1322 return ptr_set_bit(p4dp, PTI_PGTABLE_SWITCH_BIT);
1323}
1324
1325static inline p4d_t *user_to_kernel_p4dp(p4d_t *p4dp)
1326{
1327 return ptr_clear_bit(p4dp, PTI_PGTABLE_SWITCH_BIT);
1328}
1329#endif
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341static inline void clone_pgd_range(pgd_t *dst, pgd_t *src, int count)
1342{
1343 memcpy(dst, src, count * sizeof(pgd_t));
1344#ifdef CONFIG_PAGE_TABLE_ISOLATION
1345 if (!static_cpu_has(X86_FEATURE_PTI))
1346 return;
1347
1348 memcpy(kernel_to_user_pgdp(dst), kernel_to_user_pgdp(src),
1349 count * sizeof(pgd_t));
1350#endif
1351}
1352
1353#define PTE_SHIFT ilog2(PTRS_PER_PTE)
1354static inline int page_level_shift(enum pg_level level)
1355{
1356 return (PAGE_SHIFT - PTE_SHIFT) + level * PTE_SHIFT;
1357}
1358static inline unsigned long page_level_size(enum pg_level level)
1359{
1360 return 1UL << page_level_shift(level);
1361}
1362static inline unsigned long page_level_mask(enum pg_level level)
1363{
1364 return ~(page_level_size(level) - 1);
1365}
1366
1367
1368
1369
1370
1371static inline void update_mmu_cache(struct vm_area_struct *vma,
1372 unsigned long addr, pte_t *ptep)
1373{
1374}
1375static inline void update_mmu_cache_pmd(struct vm_area_struct *vma,
1376 unsigned long addr, pmd_t *pmd)
1377{
1378}
1379static inline void update_mmu_cache_pud(struct vm_area_struct *vma,
1380 unsigned long addr, pud_t *pud)
1381{
1382}
1383
1384#ifdef CONFIG_HAVE_ARCH_SOFT_DIRTY
1385static inline pte_t pte_swp_mksoft_dirty(pte_t pte)
1386{
1387 return pte_set_flags(pte, _PAGE_SWP_SOFT_DIRTY);
1388}
1389
1390static inline int pte_swp_soft_dirty(pte_t pte)
1391{
1392 return pte_flags(pte) & _PAGE_SWP_SOFT_DIRTY;
1393}
1394
1395static inline pte_t pte_swp_clear_soft_dirty(pte_t pte)
1396{
1397 return pte_clear_flags(pte, _PAGE_SWP_SOFT_DIRTY);
1398}
1399
1400#ifdef CONFIG_ARCH_ENABLE_THP_MIGRATION
1401static inline pmd_t pmd_swp_mksoft_dirty(pmd_t pmd)
1402{
1403 return pmd_set_flags(pmd, _PAGE_SWP_SOFT_DIRTY);
1404}
1405
1406static inline int pmd_swp_soft_dirty(pmd_t pmd)
1407{
1408 return pmd_flags(pmd) & _PAGE_SWP_SOFT_DIRTY;
1409}
1410
1411static inline pmd_t pmd_swp_clear_soft_dirty(pmd_t pmd)
1412{
1413 return pmd_clear_flags(pmd, _PAGE_SWP_SOFT_DIRTY);
1414}
1415#endif
1416#endif
1417
1418#ifdef CONFIG_HAVE_ARCH_USERFAULTFD_WP
1419static inline pte_t pte_swp_mkuffd_wp(pte_t pte)
1420{
1421 return pte_set_flags(pte, _PAGE_SWP_UFFD_WP);
1422}
1423
1424static inline int pte_swp_uffd_wp(pte_t pte)
1425{
1426 return pte_flags(pte) & _PAGE_SWP_UFFD_WP;
1427}
1428
1429static inline pte_t pte_swp_clear_uffd_wp(pte_t pte)
1430{
1431 return pte_clear_flags(pte, _PAGE_SWP_UFFD_WP);
1432}
1433
1434static inline pmd_t pmd_swp_mkuffd_wp(pmd_t pmd)
1435{
1436 return pmd_set_flags(pmd, _PAGE_SWP_UFFD_WP);
1437}
1438
1439static inline int pmd_swp_uffd_wp(pmd_t pmd)
1440{
1441 return pmd_flags(pmd) & _PAGE_SWP_UFFD_WP;
1442}
1443
1444static inline pmd_t pmd_swp_clear_uffd_wp(pmd_t pmd)
1445{
1446 return pmd_clear_flags(pmd, _PAGE_SWP_UFFD_WP);
1447}
1448#endif
1449
1450#define PKRU_AD_BIT 0x1
1451#define PKRU_WD_BIT 0x2
1452#define PKRU_BITS_PER_PKEY 2
1453
1454#ifdef CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS
1455extern u32 init_pkru_value;
1456#else
1457#define init_pkru_value 0
1458#endif
1459
1460static inline bool __pkru_allows_read(u32 pkru, u16 pkey)
1461{
1462 int pkru_pkey_bits = pkey * PKRU_BITS_PER_PKEY;
1463 return !(pkru & (PKRU_AD_BIT << pkru_pkey_bits));
1464}
1465
1466static inline bool __pkru_allows_write(u32 pkru, u16 pkey)
1467{
1468 int pkru_pkey_bits = pkey * PKRU_BITS_PER_PKEY;
1469
1470
1471
1472
1473 return !(pkru & ((PKRU_AD_BIT|PKRU_WD_BIT) << pkru_pkey_bits));
1474}
1475
1476static inline u16 pte_flags_pkey(unsigned long pte_flags)
1477{
1478#ifdef CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS
1479
1480 return (pte_flags & _PAGE_PKEY_MASK) >> _PAGE_BIT_PKEY_BIT0;
1481#else
1482 return 0;
1483#endif
1484}
1485
1486static inline bool __pkru_allows_pkey(u16 pkey, bool write)
1487{
1488 u32 pkru = read_pkru();
1489
1490 if (!__pkru_allows_read(pkru, pkey))
1491 return false;
1492 if (write && !__pkru_allows_write(pkru, pkey))
1493 return false;
1494
1495 return true;
1496}
1497
1498
1499
1500
1501
1502
1503static inline bool __pte_access_permitted(unsigned long pteval, bool write)
1504{
1505 unsigned long need_pte_bits = _PAGE_PRESENT|_PAGE_USER;
1506
1507 if (write)
1508 need_pte_bits |= _PAGE_RW;
1509
1510 if ((pteval & need_pte_bits) != need_pte_bits)
1511 return 0;
1512
1513 return __pkru_allows_pkey(pte_flags_pkey(pteval), write);
1514}
1515
1516#define pte_access_permitted pte_access_permitted
1517static inline bool pte_access_permitted(pte_t pte, bool write)
1518{
1519 return __pte_access_permitted(pte_val(pte), write);
1520}
1521
1522#define pmd_access_permitted pmd_access_permitted
1523static inline bool pmd_access_permitted(pmd_t pmd, bool write)
1524{
1525 return __pte_access_permitted(pmd_val(pmd), write);
1526}
1527
1528#define pud_access_permitted pud_access_permitted
1529static inline bool pud_access_permitted(pud_t pud, bool write)
1530{
1531 return __pte_access_permitted(pud_val(pud), write);
1532}
1533
1534#define __HAVE_ARCH_PFN_MODIFY_ALLOWED 1
1535extern bool pfn_modify_allowed(unsigned long pfn, pgprot_t prot);
1536
1537static inline bool arch_has_pfn_modify_check(void)
1538{
1539 return boot_cpu_has_bug(X86_BUG_L1TF);
1540}
1541
1542#define arch_faults_on_old_pte arch_faults_on_old_pte
1543static inline bool arch_faults_on_old_pte(void)
1544{
1545 return false;
1546}
1547
1548#include <asm-generic/pgtable.h>
1549#endif
1550
1551#endif
1552