1#ifndef _ASM_X86_PGTABLE_H
2#define _ASM_X86_PGTABLE_H
3
4#include <asm/page.h>
5#include <asm/e820.h>
6
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#ifndef __ASSEMBLY__
19#include <asm/x86_init.h>
20
21void ptdump_walk_pgd_level(struct seq_file *m, pgd_t *pgd);
22void ptdump_walk_pgd_level_checkwx(void);
23
24#ifdef CONFIG_DEBUG_WX
25#define debug_checkwx() ptdump_walk_pgd_level_checkwx()
26#else
27#define debug_checkwx() do { } while (0)
28#endif
29
30
31
32
33
34extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)]
35 __visible;
36#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
37
38extern spinlock_t pgd_lock;
39extern struct list_head pgd_list;
40
41extern struct mm_struct *pgd_page_get_mm(struct page *page);
42
43#ifdef CONFIG_PARAVIRT
44#include <asm/paravirt.h>
45#else
46#define set_pte(ptep, pte) native_set_pte(ptep, pte)
47#define set_pte_at(mm, addr, ptep, pte) native_set_pte_at(mm, addr, ptep, pte)
48#define set_pmd_at(mm, addr, pmdp, pmd) native_set_pmd_at(mm, addr, pmdp, pmd)
49
50#define set_pte_atomic(ptep, pte) \
51 native_set_pte_atomic(ptep, pte)
52
53#define set_pmd(pmdp, pmd) native_set_pmd(pmdp, pmd)
54
55#ifndef __PAGETABLE_PUD_FOLDED
56#define set_pgd(pgdp, pgd) native_set_pgd(pgdp, pgd)
57#define pgd_clear(pgd) native_pgd_clear(pgd)
58#endif
59
60#ifndef set_pud
61# define set_pud(pudp, pud) native_set_pud(pudp, pud)
62#endif
63
64#ifndef __PAGETABLE_PMD_FOLDED
65#define pud_clear(pud) native_pud_clear(pud)
66#endif
67
68#define pte_clear(mm, addr, ptep) native_pte_clear(mm, addr, ptep)
69#define pmd_clear(pmd) native_pmd_clear(pmd)
70
71#define pte_update(mm, addr, ptep) do { } while (0)
72
73#define pgd_val(x) native_pgd_val(x)
74#define __pgd(x) native_make_pgd(x)
75
76#ifndef __PAGETABLE_PUD_FOLDED
77#define pud_val(x) native_pud_val(x)
78#define __pud(x) native_make_pud(x)
79#endif
80
81#ifndef __PAGETABLE_PMD_FOLDED
82#define pmd_val(x) native_pmd_val(x)
83#define __pmd(x) native_make_pmd(x)
84#endif
85
86#define pte_val(x) native_pte_val(x)
87#define __pte(x) native_make_pte(x)
88
89#define arch_end_context_switch(prev) do {} while(0)
90
91#endif
92
93
94
95
96
97static inline int pte_dirty(pte_t pte)
98{
99 return pte_flags(pte) & _PAGE_DIRTY;
100}
101
102
103static inline u32 read_pkru(void)
104{
105 if (boot_cpu_has(X86_FEATURE_OSPKE))
106 return __read_pkru();
107 return 0;
108}
109
110static inline void write_pkru(u32 pkru)
111{
112 if (boot_cpu_has(X86_FEATURE_OSPKE))
113 __write_pkru(pkru);
114}
115
116static inline int pte_young(pte_t pte)
117{
118 return pte_flags(pte) & _PAGE_ACCESSED;
119}
120
121static inline int pmd_dirty(pmd_t pmd)
122{
123 return pmd_flags(pmd) & _PAGE_DIRTY;
124}
125
126static inline int pmd_young(pmd_t pmd)
127{
128 return pmd_flags(pmd) & _PAGE_ACCESSED;
129}
130
131static inline int pte_write(pte_t pte)
132{
133 return pte_flags(pte) & _PAGE_RW;
134}
135
136static inline int pte_huge(pte_t pte)
137{
138 return pte_flags(pte) & _PAGE_PSE;
139}
140
141static inline int pte_global(pte_t pte)
142{
143 return pte_flags(pte) & _PAGE_GLOBAL;
144}
145
146static inline int pte_exec(pte_t pte)
147{
148 return !(pte_flags(pte) & _PAGE_NX);
149}
150
151static inline int pte_special(pte_t pte)
152{
153 return pte_flags(pte) & _PAGE_SPECIAL;
154}
155
156static inline unsigned long pte_pfn(pte_t pte)
157{
158 return (pte_val(pte) & PTE_PFN_MASK) >> PAGE_SHIFT;
159}
160
161static inline unsigned long pmd_pfn(pmd_t pmd)
162{
163 return (pmd_val(pmd) & pmd_pfn_mask(pmd)) >> PAGE_SHIFT;
164}
165
166static inline unsigned long pud_pfn(pud_t pud)
167{
168 return (pud_val(pud) & pud_pfn_mask(pud)) >> PAGE_SHIFT;
169}
170
171#define pte_page(pte) pfn_to_page(pte_pfn(pte))
172
173static inline int pmd_large(pmd_t pte)
174{
175 return pmd_flags(pte) & _PAGE_PSE;
176}
177
178#ifdef CONFIG_TRANSPARENT_HUGEPAGE
179static inline int pmd_trans_huge(pmd_t pmd)
180{
181 return (pmd_val(pmd) & (_PAGE_PSE|_PAGE_DEVMAP)) == _PAGE_PSE;
182}
183
184static inline int has_transparent_hugepage(void)
185{
186 return cpu_has_pse;
187}
188
189#ifdef __HAVE_ARCH_PTE_DEVMAP
190static inline int pmd_devmap(pmd_t pmd)
191{
192 return !!(pmd_val(pmd) & _PAGE_DEVMAP);
193}
194#endif
195#endif
196
197static inline pte_t pte_set_flags(pte_t pte, pteval_t set)
198{
199 pteval_t v = native_pte_val(pte);
200
201 return native_make_pte(v | set);
202}
203
204static inline pte_t pte_clear_flags(pte_t pte, pteval_t clear)
205{
206 pteval_t v = native_pte_val(pte);
207
208 return native_make_pte(v & ~clear);
209}
210
211static inline pte_t pte_mkclean(pte_t pte)
212{
213 return pte_clear_flags(pte, _PAGE_DIRTY);
214}
215
216static inline pte_t pte_mkold(pte_t pte)
217{
218 return pte_clear_flags(pte, _PAGE_ACCESSED);
219}
220
221static inline pte_t pte_wrprotect(pte_t pte)
222{
223 return pte_clear_flags(pte, _PAGE_RW);
224}
225
226static inline pte_t pte_mkexec(pte_t pte)
227{
228 return pte_clear_flags(pte, _PAGE_NX);
229}
230
231static inline pte_t pte_mkdirty(pte_t pte)
232{
233 return pte_set_flags(pte, _PAGE_DIRTY | _PAGE_SOFT_DIRTY);
234}
235
236static inline pte_t pte_mkyoung(pte_t pte)
237{
238 return pte_set_flags(pte, _PAGE_ACCESSED);
239}
240
241static inline pte_t pte_mkwrite(pte_t pte)
242{
243 return pte_set_flags(pte, _PAGE_RW);
244}
245
246static inline pte_t pte_mkhuge(pte_t pte)
247{
248 return pte_set_flags(pte, _PAGE_PSE);
249}
250
251static inline pte_t pte_clrhuge(pte_t pte)
252{
253 return pte_clear_flags(pte, _PAGE_PSE);
254}
255
256static inline pte_t pte_mkglobal(pte_t pte)
257{
258 return pte_set_flags(pte, _PAGE_GLOBAL);
259}
260
261static inline pte_t pte_clrglobal(pte_t pte)
262{
263 return pte_clear_flags(pte, _PAGE_GLOBAL);
264}
265
266static inline pte_t pte_mkspecial(pte_t pte)
267{
268 return pte_set_flags(pte, _PAGE_SPECIAL);
269}
270
271static inline pte_t pte_mkdevmap(pte_t pte)
272{
273 return pte_set_flags(pte, _PAGE_SPECIAL|_PAGE_DEVMAP);
274}
275
276static inline pmd_t pmd_set_flags(pmd_t pmd, pmdval_t set)
277{
278 pmdval_t v = native_pmd_val(pmd);
279
280 return __pmd(v | set);
281}
282
283static inline pmd_t pmd_clear_flags(pmd_t pmd, pmdval_t clear)
284{
285 pmdval_t v = native_pmd_val(pmd);
286
287 return __pmd(v & ~clear);
288}
289
290static inline pmd_t pmd_mkold(pmd_t pmd)
291{
292 return pmd_clear_flags(pmd, _PAGE_ACCESSED);
293}
294
295static inline pmd_t pmd_mkclean(pmd_t pmd)
296{
297 return pmd_clear_flags(pmd, _PAGE_DIRTY);
298}
299
300static inline pmd_t pmd_wrprotect(pmd_t pmd)
301{
302 return pmd_clear_flags(pmd, _PAGE_RW);
303}
304
305static inline pmd_t pmd_mkdirty(pmd_t pmd)
306{
307 return pmd_set_flags(pmd, _PAGE_DIRTY | _PAGE_SOFT_DIRTY);
308}
309
310static inline pmd_t pmd_mkdevmap(pmd_t pmd)
311{
312 return pmd_set_flags(pmd, _PAGE_DEVMAP);
313}
314
315static inline pmd_t pmd_mkhuge(pmd_t pmd)
316{
317 return pmd_set_flags(pmd, _PAGE_PSE);
318}
319
320static inline pmd_t pmd_mkyoung(pmd_t pmd)
321{
322 return pmd_set_flags(pmd, _PAGE_ACCESSED);
323}
324
325static inline pmd_t pmd_mkwrite(pmd_t pmd)
326{
327 return pmd_set_flags(pmd, _PAGE_RW);
328}
329
330static inline pmd_t pmd_mknotpresent(pmd_t pmd)
331{
332 return pmd_clear_flags(pmd, _PAGE_PRESENT | _PAGE_PROTNONE);
333}
334
335#ifdef CONFIG_HAVE_ARCH_SOFT_DIRTY
336static inline int pte_soft_dirty(pte_t pte)
337{
338 return pte_flags(pte) & _PAGE_SOFT_DIRTY;
339}
340
341static inline int pmd_soft_dirty(pmd_t pmd)
342{
343 return pmd_flags(pmd) & _PAGE_SOFT_DIRTY;
344}
345
346static inline pte_t pte_mksoft_dirty(pte_t pte)
347{
348 return pte_set_flags(pte, _PAGE_SOFT_DIRTY);
349}
350
351static inline pmd_t pmd_mksoft_dirty(pmd_t pmd)
352{
353 return pmd_set_flags(pmd, _PAGE_SOFT_DIRTY);
354}
355
356static inline pte_t pte_clear_soft_dirty(pte_t pte)
357{
358 return pte_clear_flags(pte, _PAGE_SOFT_DIRTY);
359}
360
361static inline pmd_t pmd_clear_soft_dirty(pmd_t pmd)
362{
363 return pmd_clear_flags(pmd, _PAGE_SOFT_DIRTY);
364}
365
366#endif
367
368
369
370
371
372static inline pgprotval_t massage_pgprot(pgprot_t pgprot)
373{
374 pgprotval_t protval = pgprot_val(pgprot);
375
376 if (protval & _PAGE_PRESENT)
377 protval &= __supported_pte_mask;
378
379 return protval;
380}
381
382static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot)
383{
384 return __pte(((phys_addr_t)page_nr << PAGE_SHIFT) |
385 massage_pgprot(pgprot));
386}
387
388static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot)
389{
390 return __pmd(((phys_addr_t)page_nr << PAGE_SHIFT) |
391 massage_pgprot(pgprot));
392}
393
394static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
395{
396 pteval_t val = pte_val(pte);
397
398
399
400
401
402 val &= _PAGE_CHG_MASK;
403 val |= massage_pgprot(newprot) & ~_PAGE_CHG_MASK;
404
405 return __pte(val);
406}
407
408static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
409{
410 pmdval_t val = pmd_val(pmd);
411
412 val &= _HPAGE_CHG_MASK;
413 val |= massage_pgprot(newprot) & ~_HPAGE_CHG_MASK;
414
415 return __pmd(val);
416}
417
418
419#define pgprot_modify pgprot_modify
420static inline pgprot_t pgprot_modify(pgprot_t oldprot, pgprot_t newprot)
421{
422 pgprotval_t preservebits = pgprot_val(oldprot) & _PAGE_CHG_MASK;
423 pgprotval_t addbits = pgprot_val(newprot);
424 return __pgprot(preservebits | addbits);
425}
426
427#define pte_pgprot(x) __pgprot(pte_flags(x))
428#define pmd_pgprot(x) __pgprot(pmd_flags(x))
429#define pud_pgprot(x) __pgprot(pud_flags(x))
430
431#define canon_pgprot(p) __pgprot(massage_pgprot(p))
432
433static inline int is_new_memtype_allowed(u64 paddr, unsigned long size,
434 enum page_cache_mode pcm,
435 enum page_cache_mode new_pcm)
436{
437
438
439
440 if (x86_platform.is_untracked_pat_range(paddr, paddr + size))
441 return 1;
442
443
444
445
446
447
448
449
450
451 if ((pcm == _PAGE_CACHE_MODE_UC_MINUS &&
452 new_pcm == _PAGE_CACHE_MODE_WB) ||
453 (pcm == _PAGE_CACHE_MODE_WC &&
454 new_pcm == _PAGE_CACHE_MODE_WB) ||
455 (pcm == _PAGE_CACHE_MODE_WT &&
456 new_pcm == _PAGE_CACHE_MODE_WB) ||
457 (pcm == _PAGE_CACHE_MODE_WT &&
458 new_pcm == _PAGE_CACHE_MODE_WC)) {
459 return 0;
460 }
461
462 return 1;
463}
464
465pmd_t *populate_extra_pmd(unsigned long vaddr);
466pte_t *populate_extra_pte(unsigned long vaddr);
467#endif
468
469#ifdef CONFIG_X86_32
470# include <asm/pgtable_32.h>
471#else
472# include <asm/pgtable_64.h>
473#endif
474
475#ifndef __ASSEMBLY__
476#include <linux/mm_types.h>
477#include <linux/mmdebug.h>
478#include <linux/log2.h>
479
480static inline int pte_none(pte_t pte)
481{
482 return !pte.pte;
483}
484
485#define __HAVE_ARCH_PTE_SAME
486static inline int pte_same(pte_t a, pte_t b)
487{
488 return a.pte == b.pte;
489}
490
491static inline int pte_present(pte_t a)
492{
493 return pte_flags(a) & (_PAGE_PRESENT | _PAGE_PROTNONE);
494}
495
496#ifdef __HAVE_ARCH_PTE_DEVMAP
497static inline int pte_devmap(pte_t a)
498{
499 return (pte_flags(a) & _PAGE_DEVMAP) == _PAGE_DEVMAP;
500}
501#endif
502
503#define pte_accessible pte_accessible
504static inline bool pte_accessible(struct mm_struct *mm, pte_t a)
505{
506 if (pte_flags(a) & _PAGE_PRESENT)
507 return true;
508
509 if ((pte_flags(a) & _PAGE_PROTNONE) &&
510 mm_tlb_flush_pending(mm))
511 return true;
512
513 return false;
514}
515
516static inline int pte_hidden(pte_t pte)
517{
518 return pte_flags(pte) & _PAGE_HIDDEN;
519}
520
521static inline int pmd_present(pmd_t pmd)
522{
523
524
525
526
527
528
529 return pmd_flags(pmd) & (_PAGE_PRESENT | _PAGE_PROTNONE | _PAGE_PSE);
530}
531
532#ifdef CONFIG_NUMA_BALANCING
533
534
535
536
537static inline int pte_protnone(pte_t pte)
538{
539 return (pte_flags(pte) & (_PAGE_PROTNONE | _PAGE_PRESENT))
540 == _PAGE_PROTNONE;
541}
542
543static inline int pmd_protnone(pmd_t pmd)
544{
545 return (pmd_flags(pmd) & (_PAGE_PROTNONE | _PAGE_PRESENT))
546 == _PAGE_PROTNONE;
547}
548#endif
549
550static inline int pmd_none(pmd_t pmd)
551{
552
553
554 return (unsigned long)native_pmd_val(pmd) == 0;
555}
556
557static inline unsigned long pmd_page_vaddr(pmd_t pmd)
558{
559 return (unsigned long)__va(pmd_val(pmd) & pmd_pfn_mask(pmd));
560}
561
562
563
564
565
566#define pmd_page(pmd) \
567 pfn_to_page((pmd_val(pmd) & pmd_pfn_mask(pmd)) >> PAGE_SHIFT)
568
569
570
571
572
573
574
575static inline unsigned long pmd_index(unsigned long address)
576{
577 return (address >> PMD_SHIFT) & (PTRS_PER_PMD - 1);
578}
579
580
581
582
583
584
585
586
587#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
588
589
590
591
592
593
594
595static inline unsigned long pte_index(unsigned long address)
596{
597 return (address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1);
598}
599
600static inline pte_t *pte_offset_kernel(pmd_t *pmd, unsigned long address)
601{
602 return (pte_t *)pmd_page_vaddr(*pmd) + pte_index(address);
603}
604
605static inline int pmd_bad(pmd_t pmd)
606{
607 return (pmd_flags(pmd) & ~_PAGE_USER) != _KERNPG_TABLE;
608}
609
610static inline unsigned long pages_to_mb(unsigned long npg)
611{
612 return npg >> (20 - PAGE_SHIFT);
613}
614
615#if CONFIG_PGTABLE_LEVELS > 2
616static inline int pud_none(pud_t pud)
617{
618 return native_pud_val(pud) == 0;
619}
620
621static inline int pud_present(pud_t pud)
622{
623 return pud_flags(pud) & _PAGE_PRESENT;
624}
625
626static inline unsigned long pud_page_vaddr(pud_t pud)
627{
628 return (unsigned long)__va(pud_val(pud) & pud_pfn_mask(pud));
629}
630
631
632
633
634
635#define pud_page(pud) \
636 pfn_to_page((pud_val(pud) & pud_pfn_mask(pud)) >> PAGE_SHIFT)
637
638
639static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address)
640{
641 return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(address);
642}
643
644static inline int pud_large(pud_t pud)
645{
646 return (pud_val(pud) & (_PAGE_PSE | _PAGE_PRESENT)) ==
647 (_PAGE_PSE | _PAGE_PRESENT);
648}
649
650static inline int pud_bad(pud_t pud)
651{
652 return (pud_flags(pud) & ~(_KERNPG_TABLE | _PAGE_USER)) != 0;
653}
654#else
655static inline int pud_large(pud_t pud)
656{
657 return 0;
658}
659#endif
660
661#if CONFIG_PGTABLE_LEVELS > 3
662static inline int pgd_present(pgd_t pgd)
663{
664 return pgd_flags(pgd) & _PAGE_PRESENT;
665}
666
667static inline unsigned long pgd_page_vaddr(pgd_t pgd)
668{
669 return (unsigned long)__va((unsigned long)pgd_val(pgd) & PTE_PFN_MASK);
670}
671
672
673
674
675
676#define pgd_page(pgd) pfn_to_page(pgd_val(pgd) >> PAGE_SHIFT)
677
678
679static inline unsigned long pud_index(unsigned long address)
680{
681 return (address >> PUD_SHIFT) & (PTRS_PER_PUD - 1);
682}
683
684static inline pud_t *pud_offset(pgd_t *pgd, unsigned long address)
685{
686 return (pud_t *)pgd_page_vaddr(*pgd) + pud_index(address);
687}
688
689static inline int pgd_bad(pgd_t pgd)
690{
691 return (pgd_flags(pgd) & ~_PAGE_USER) != _KERNPG_TABLE;
692}
693
694static inline int pgd_none(pgd_t pgd)
695{
696 return !native_pgd_val(pgd);
697}
698#endif
699
700#endif
701
702
703
704
705
706
707
708#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))
709
710
711
712
713
714#define pgd_offset(mm, address) ((mm)->pgd + pgd_index((address)))
715
716
717
718
719#define pgd_offset_k(address) pgd_offset(&init_mm, (address))
720
721
722#define KERNEL_PGD_BOUNDARY pgd_index(PAGE_OFFSET)
723#define KERNEL_PGD_PTRS (PTRS_PER_PGD - KERNEL_PGD_BOUNDARY)
724
725#ifndef __ASSEMBLY__
726
727extern int direct_gbpages;
728void init_mem_mapping(void);
729void early_alloc_pgt_buf(void);
730
731
732static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep)
733{
734 pte_t res = *ptep;
735
736
737 native_pte_clear(NULL, 0, ptep);
738 return res;
739}
740
741static inline pmd_t native_local_pmdp_get_and_clear(pmd_t *pmdp)
742{
743 pmd_t res = *pmdp;
744
745 native_pmd_clear(pmdp);
746 return res;
747}
748
749static inline void native_set_pte_at(struct mm_struct *mm, unsigned long addr,
750 pte_t *ptep , pte_t pte)
751{
752 native_set_pte(ptep, pte);
753}
754
755static inline void native_set_pmd_at(struct mm_struct *mm, unsigned long addr,
756 pmd_t *pmdp , pmd_t pmd)
757{
758 native_set_pmd(pmdp, pmd);
759}
760
761#ifndef CONFIG_PARAVIRT
762
763
764
765
766
767
768
769
770
771#define pte_update(mm, addr, ptep) do { } while (0)
772#endif
773
774
775
776
777
778
779
780
781struct vm_area_struct;
782
783#define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
784extern int ptep_set_access_flags(struct vm_area_struct *vma,
785 unsigned long address, pte_t *ptep,
786 pte_t entry, int dirty);
787
788#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
789extern int ptep_test_and_clear_young(struct vm_area_struct *vma,
790 unsigned long addr, pte_t *ptep);
791
792#define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH
793extern int ptep_clear_flush_young(struct vm_area_struct *vma,
794 unsigned long address, pte_t *ptep);
795
796#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
797static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
798 pte_t *ptep)
799{
800 pte_t pte = native_ptep_get_and_clear(ptep);
801 pte_update(mm, addr, ptep);
802 return pte;
803}
804
805#define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL
806static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm,
807 unsigned long addr, pte_t *ptep,
808 int full)
809{
810 pte_t pte;
811 if (full) {
812
813
814
815
816 pte = native_local_ptep_get_and_clear(ptep);
817 } else {
818 pte = ptep_get_and_clear(mm, addr, ptep);
819 }
820 return pte;
821}
822
823#define __HAVE_ARCH_PTEP_SET_WRPROTECT
824static inline void ptep_set_wrprotect(struct mm_struct *mm,
825 unsigned long addr, pte_t *ptep)
826{
827 clear_bit(_PAGE_BIT_RW, (unsigned long *)&ptep->pte);
828 pte_update(mm, addr, ptep);
829}
830
831#define flush_tlb_fix_spurious_fault(vma, address) do { } while (0)
832
833#define mk_pmd(page, pgprot) pfn_pmd(page_to_pfn(page), (pgprot))
834
835#define __HAVE_ARCH_PMDP_SET_ACCESS_FLAGS
836extern int pmdp_set_access_flags(struct vm_area_struct *vma,
837 unsigned long address, pmd_t *pmdp,
838 pmd_t entry, int dirty);
839
840#define __HAVE_ARCH_PMDP_TEST_AND_CLEAR_YOUNG
841extern int pmdp_test_and_clear_young(struct vm_area_struct *vma,
842 unsigned long addr, pmd_t *pmdp);
843
844#define __HAVE_ARCH_PMDP_CLEAR_YOUNG_FLUSH
845extern int pmdp_clear_flush_young(struct vm_area_struct *vma,
846 unsigned long address, pmd_t *pmdp);
847
848
849#define __HAVE_ARCH_PMD_WRITE
850static inline int pmd_write(pmd_t pmd)
851{
852 return pmd_flags(pmd) & _PAGE_RW;
853}
854
855#define __HAVE_ARCH_PMDP_HUGE_GET_AND_CLEAR
856static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm, unsigned long addr,
857 pmd_t *pmdp)
858{
859 return native_pmdp_get_and_clear(pmdp);
860}
861
862#define __HAVE_ARCH_PMDP_SET_WRPROTECT
863static inline void pmdp_set_wrprotect(struct mm_struct *mm,
864 unsigned long addr, pmd_t *pmdp)
865{
866 clear_bit(_PAGE_BIT_RW, (unsigned long *)pmdp);
867}
868
869
870
871
872
873
874
875
876
877
878
879static inline void clone_pgd_range(pgd_t *dst, pgd_t *src, int count)
880{
881 memcpy(dst, src, count * sizeof(pgd_t));
882}
883
884#define PTE_SHIFT ilog2(PTRS_PER_PTE)
885static inline int page_level_shift(enum pg_level level)
886{
887 return (PAGE_SHIFT - PTE_SHIFT) + level * PTE_SHIFT;
888}
889static inline unsigned long page_level_size(enum pg_level level)
890{
891 return 1UL << page_level_shift(level);
892}
893static inline unsigned long page_level_mask(enum pg_level level)
894{
895 return ~(page_level_size(level) - 1);
896}
897
898
899
900
901
902static inline void update_mmu_cache(struct vm_area_struct *vma,
903 unsigned long addr, pte_t *ptep)
904{
905}
906static inline void update_mmu_cache_pmd(struct vm_area_struct *vma,
907 unsigned long addr, pmd_t *pmd)
908{
909}
910
911#ifdef CONFIG_HAVE_ARCH_SOFT_DIRTY
912static inline pte_t pte_swp_mksoft_dirty(pte_t pte)
913{
914 return pte_set_flags(pte, _PAGE_SWP_SOFT_DIRTY);
915}
916
917static inline int pte_swp_soft_dirty(pte_t pte)
918{
919 return pte_flags(pte) & _PAGE_SWP_SOFT_DIRTY;
920}
921
922static inline pte_t pte_swp_clear_soft_dirty(pte_t pte)
923{
924 return pte_clear_flags(pte, _PAGE_SWP_SOFT_DIRTY);
925}
926#endif
927
928#define PKRU_AD_BIT 0x1
929#define PKRU_WD_BIT 0x2
930#define PKRU_BITS_PER_PKEY 2
931
932static inline bool __pkru_allows_read(u32 pkru, u16 pkey)
933{
934 int pkru_pkey_bits = pkey * PKRU_BITS_PER_PKEY;
935 return !(pkru & (PKRU_AD_BIT << pkru_pkey_bits));
936}
937
938static inline bool __pkru_allows_write(u32 pkru, u16 pkey)
939{
940 int pkru_pkey_bits = pkey * PKRU_BITS_PER_PKEY;
941
942
943
944
945 return !(pkru & ((PKRU_AD_BIT|PKRU_WD_BIT) << pkru_pkey_bits));
946}
947
948static inline u16 pte_flags_pkey(unsigned long pte_flags)
949{
950#ifdef CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS
951
952 return (pte_flags & _PAGE_PKEY_MASK) >> _PAGE_BIT_PKEY_BIT0;
953#else
954 return 0;
955#endif
956}
957
958#include <asm-generic/pgtable.h>
959#endif
960
961#endif
962