1
2#ifndef _ASM_POWERPC_BOOK3S_64_PGTABLE_H_
3#define _ASM_POWERPC_BOOK3S_64_PGTABLE_H_
4
5#include <asm-generic/pgtable-nop4d.h>
6
7#ifndef __ASSEMBLY__
8#include <linux/mmdebug.h>
9#include <linux/bug.h>
10#include <linux/sizes.h>
11#endif
12
13
14
15
16#define _PAGE_BIT_SWAP_TYPE 0
17
18#define _PAGE_EXEC 0x00001
19#define _PAGE_WRITE 0x00002
20#define _PAGE_READ 0x00004
21#define _PAGE_RW (_PAGE_READ | _PAGE_WRITE)
22#define _PAGE_RWX (_PAGE_READ | _PAGE_WRITE | _PAGE_EXEC)
23#define _PAGE_PRIVILEGED 0x00008
24#define _PAGE_SAO 0x00010
25#define _PAGE_NON_IDEMPOTENT 0x00020
26#define _PAGE_TOLERANT 0x00030
27#define _PAGE_DIRTY 0x00080
28#define _PAGE_ACCESSED 0x00100
29
30
31
32#define _RPAGE_SW0 0x2000000000000000UL
33#define _RPAGE_SW1 0x00800
34#define _RPAGE_SW2 0x00400
35#define _RPAGE_SW3 0x00200
36#define _RPAGE_RSV1 0x00040UL
37
38#define _RPAGE_PKEY_BIT4 0x1000000000000000UL
39#define _RPAGE_PKEY_BIT3 0x0800000000000000UL
40#define _RPAGE_PKEY_BIT2 0x0400000000000000UL
41#define _RPAGE_PKEY_BIT1 0x0200000000000000UL
42#define _RPAGE_PKEY_BIT0 0x0100000000000000UL
43
44#define _PAGE_PTE 0x4000000000000000UL
45#define _PAGE_PRESENT 0x8000000000000000UL
46
47
48
49
50
51
52
53
54
55#define _PAGE_INVALID _RPAGE_SW0
56
57
58
59
60
61
62#define _RPAGE_RPN0 0x01000
63#define _RPAGE_RPN1 0x02000
64#define _RPAGE_RPN43 0x0080000000000000UL
65#define _RPAGE_RPN42 0x0040000000000000UL
66#define _RPAGE_RPN41 0x0020000000000000UL
67
68
69#define _RPAGE_PA_MAX 56
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90#define _PAGE_PA_MAX 53
91
92#define _PAGE_SOFT_DIRTY _RPAGE_SW3
93#define _PAGE_SPECIAL _RPAGE_SW2
94#define _PAGE_DEVMAP _RPAGE_SW1
95
96
97
98
99
100
101#define _PAGE_NO_CACHE _PAGE_TOLERANT
102
103
104
105
106
107#define PTE_RPN_MASK (((1UL << _PAGE_PA_MAX) - 1) & (PAGE_MASK))
108
109
110
111
112#define _HPAGE_CHG_MASK (PTE_RPN_MASK | _PAGE_HPTEFLAGS | _PAGE_DIRTY | \
113 _PAGE_ACCESSED | H_PAGE_THP_HUGE | _PAGE_PTE | \
114 _PAGE_SOFT_DIRTY | _PAGE_DEVMAP)
115
116
117
118#define _PAGE_KERNEL_RW (_PAGE_PRIVILEGED | _PAGE_RW | _PAGE_DIRTY)
119#define _PAGE_KERNEL_RO (_PAGE_PRIVILEGED | _PAGE_READ)
120#define _PAGE_KERNEL_ROX (_PAGE_PRIVILEGED | _PAGE_READ | _PAGE_EXEC)
121#define _PAGE_KERNEL_RWX (_PAGE_PRIVILEGED | _PAGE_DIRTY | \
122 _PAGE_RW | _PAGE_EXEC)
123
124
125
126
127#define _PAGE_CHG_MASK (PTE_RPN_MASK | _PAGE_HPTEFLAGS | _PAGE_DIRTY | \
128 _PAGE_ACCESSED | _PAGE_SPECIAL | _PAGE_PTE | \
129 _PAGE_SOFT_DIRTY | _PAGE_DEVMAP)
130
131
132
133
134
135
136
137#define _PAGE_BASE_NC (_PAGE_PRESENT | _PAGE_ACCESSED)
138#define _PAGE_BASE (_PAGE_BASE_NC)
139
140
141
142
143
144
145
146
147
148#define PAGE_NONE __pgprot(_PAGE_BASE | _PAGE_PRIVILEGED)
149#define PAGE_SHARED __pgprot(_PAGE_BASE | _PAGE_RW)
150#define PAGE_SHARED_X __pgprot(_PAGE_BASE | _PAGE_RW | _PAGE_EXEC)
151#define PAGE_COPY __pgprot(_PAGE_BASE | _PAGE_READ)
152#define PAGE_COPY_X __pgprot(_PAGE_BASE | _PAGE_READ | _PAGE_EXEC)
153#define PAGE_READONLY __pgprot(_PAGE_BASE | _PAGE_READ)
154#define PAGE_READONLY_X __pgprot(_PAGE_BASE | _PAGE_READ | _PAGE_EXEC)
155
156
157#define PAGE_KERNEL __pgprot(_PAGE_BASE | _PAGE_KERNEL_RW)
158#define PAGE_KERNEL_NC __pgprot(_PAGE_BASE_NC | _PAGE_KERNEL_RW | \
159 _PAGE_TOLERANT)
160#define PAGE_KERNEL_NCG __pgprot(_PAGE_BASE_NC | _PAGE_KERNEL_RW | \
161 _PAGE_NON_IDEMPOTENT)
162#define PAGE_KERNEL_X __pgprot(_PAGE_BASE | _PAGE_KERNEL_RWX)
163#define PAGE_KERNEL_RO __pgprot(_PAGE_BASE | _PAGE_KERNEL_RO)
164#define PAGE_KERNEL_ROX __pgprot(_PAGE_BASE | _PAGE_KERNEL_ROX)
165
166
167
168
169
170
171#if defined(CONFIG_KGDB) || defined(CONFIG_XMON) || defined(CONFIG_BDI_SWITCH) || \
172 defined(CONFIG_KPROBES) || defined(CONFIG_DYNAMIC_FTRACE)
173#define PAGE_KERNEL_TEXT PAGE_KERNEL_X
174#else
175#define PAGE_KERNEL_TEXT PAGE_KERNEL_ROX
176#endif
177
178
179#define PAGE_KERNEL_EXEC PAGE_KERNEL_X
180#define PAGE_AGP (PAGE_KERNEL_NC)
181
182#ifndef __ASSEMBLY__
183
184
185
186extern unsigned long __pte_index_size;
187extern unsigned long __pmd_index_size;
188extern unsigned long __pud_index_size;
189extern unsigned long __pgd_index_size;
190extern unsigned long __pud_cache_index;
191#define PTE_INDEX_SIZE __pte_index_size
192#define PMD_INDEX_SIZE __pmd_index_size
193#define PUD_INDEX_SIZE __pud_index_size
194#define PGD_INDEX_SIZE __pgd_index_size
195
196#define PMD_CACHE_INDEX 0
197#define PUD_CACHE_INDEX __pud_cache_index
198
199
200
201
202extern unsigned long __pte_table_size;
203extern unsigned long __pmd_table_size;
204extern unsigned long __pud_table_size;
205extern unsigned long __pgd_table_size;
206#define PTE_TABLE_SIZE __pte_table_size
207#define PMD_TABLE_SIZE __pmd_table_size
208#define PUD_TABLE_SIZE __pud_table_size
209#define PGD_TABLE_SIZE __pgd_table_size
210
211extern unsigned long __pmd_val_bits;
212extern unsigned long __pud_val_bits;
213extern unsigned long __pgd_val_bits;
214#define PMD_VAL_BITS __pmd_val_bits
215#define PUD_VAL_BITS __pud_val_bits
216#define PGD_VAL_BITS __pgd_val_bits
217
218extern unsigned long __pte_frag_nr;
219#define PTE_FRAG_NR __pte_frag_nr
220extern unsigned long __pte_frag_size_shift;
221#define PTE_FRAG_SIZE_SHIFT __pte_frag_size_shift
222#define PTE_FRAG_SIZE (1UL << PTE_FRAG_SIZE_SHIFT)
223
224extern unsigned long __pmd_frag_nr;
225#define PMD_FRAG_NR __pmd_frag_nr
226extern unsigned long __pmd_frag_size_shift;
227#define PMD_FRAG_SIZE_SHIFT __pmd_frag_size_shift
228#define PMD_FRAG_SIZE (1UL << PMD_FRAG_SIZE_SHIFT)
229
230#define PTRS_PER_PTE (1 << PTE_INDEX_SIZE)
231#define PTRS_PER_PMD (1 << PMD_INDEX_SIZE)
232#define PTRS_PER_PUD (1 << PUD_INDEX_SIZE)
233#define PTRS_PER_PGD (1 << PGD_INDEX_SIZE)
234
235#define MAX_PTRS_PER_PGD (1 << (H_PGD_INDEX_SIZE > RADIX_PGD_INDEX_SIZE ? \
236 H_PGD_INDEX_SIZE : RADIX_PGD_INDEX_SIZE))
237
238
239#define PMD_SHIFT (PAGE_SHIFT + PTE_INDEX_SIZE)
240#define PMD_SIZE (1UL << PMD_SHIFT)
241#define PMD_MASK (~(PMD_SIZE-1))
242
243
244#define PUD_SHIFT (PMD_SHIFT + PMD_INDEX_SIZE)
245#define PUD_SIZE (1UL << PUD_SHIFT)
246#define PUD_MASK (~(PUD_SIZE-1))
247
248
249#define PGDIR_SHIFT (PUD_SHIFT + PUD_INDEX_SIZE)
250#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
251#define PGDIR_MASK (~(PGDIR_SIZE-1))
252
253
254#define PMD_MASKED_BITS 0xc0000000000000ffUL
255
256#define PUD_MASKED_BITS 0xc0000000000000ffUL
257
258#define P4D_MASKED_BITS 0xc0000000000000ffUL
259
260
261
262
263enum pgtable_index {
264 PTE_INDEX = 0,
265 PMD_INDEX,
266 PUD_INDEX,
267 PGD_INDEX,
268
269
270
271 HTLB_16M_INDEX,
272 HTLB_16G_INDEX,
273};
274
275extern unsigned long __vmalloc_start;
276extern unsigned long __vmalloc_end;
277#define VMALLOC_START __vmalloc_start
278#define VMALLOC_END __vmalloc_end
279
280static inline unsigned int ioremap_max_order(void)
281{
282 if (radix_enabled())
283 return PUD_SHIFT;
284 return 7 + PAGE_SHIFT;
285}
286#define IOREMAP_MAX_ORDER ioremap_max_order()
287
288extern unsigned long __kernel_virt_start;
289extern unsigned long __kernel_io_start;
290extern unsigned long __kernel_io_end;
291#define KERN_VIRT_START __kernel_virt_start
292#define KERN_IO_START __kernel_io_start
293#define KERN_IO_END __kernel_io_end
294
295extern struct page *vmemmap;
296extern unsigned long pci_io_base;
297#endif
298
299#include <asm/book3s/64/hash.h>
300#include <asm/book3s/64/radix.h>
301
302#if H_MAX_PHYSMEM_BITS > R_MAX_PHYSMEM_BITS
303#define MAX_PHYSMEM_BITS H_MAX_PHYSMEM_BITS
304#else
305#define MAX_PHYSMEM_BITS R_MAX_PHYSMEM_BITS
306#endif
307
308
309#ifdef CONFIG_PPC_64K_PAGES
310#include <asm/book3s/64/pgtable-64k.h>
311#else
312#include <asm/book3s/64/pgtable-4k.h>
313#endif
314
315#include <asm/barrier.h>
316
317
318
319
320
321
322
323
324#define FULL_IO_SIZE 0x80000000ul
325#define ISA_IO_BASE (KERN_IO_START)
326#define ISA_IO_END (KERN_IO_START + 0x10000ul)
327#define PHB_IO_BASE (ISA_IO_END)
328#define PHB_IO_END (KERN_IO_START + FULL_IO_SIZE)
329#define IOREMAP_BASE (PHB_IO_END)
330#define IOREMAP_START (ioremap_bot)
331#define IOREMAP_END (KERN_IO_END - FIXADDR_SIZE)
332#define FIXADDR_SIZE SZ_32M
333
334
335#define HAVE_PAGE_AGP
336
337#ifndef __ASSEMBLY__
338
339
340
341
342
343
344#ifndef __real_pte
345
346#define __real_pte(e, p, o) ((real_pte_t){(e)})
347#define __rpte_to_pte(r) ((r).pte)
348#define __rpte_to_hidx(r,index) (pte_val(__rpte_to_pte(r)) >> H_PAGE_F_GIX_SHIFT)
349
350#define pte_iterate_hashed_subpages(rpte, psize, va, index, shift) \
351 do { \
352 index = 0; \
353 shift = mmu_psize_defs[psize].shift; \
354
355#define pte_iterate_hashed_end() } while(0)
356
357
358
359
360
361#define pte_pagesize_index(mm, addr, pte) MMU_PAGE_4K
362
363#endif
364
365static inline unsigned long pte_update(struct mm_struct *mm, unsigned long addr,
366 pte_t *ptep, unsigned long clr,
367 unsigned long set, int huge)
368{
369 if (radix_enabled())
370 return radix__pte_update(mm, addr, ptep, clr, set, huge);
371 return hash__pte_update(mm, addr, ptep, clr, set, huge);
372}
373
374
375
376
377
378
379
380
381
382
383static inline int __ptep_test_and_clear_young(struct mm_struct *mm,
384 unsigned long addr, pte_t *ptep)
385{
386 unsigned long old;
387
388 if ((pte_raw(*ptep) & cpu_to_be64(_PAGE_ACCESSED | H_PAGE_HASHPTE)) == 0)
389 return 0;
390 old = pte_update(mm, addr, ptep, _PAGE_ACCESSED, 0, 0);
391 return (old & _PAGE_ACCESSED) != 0;
392}
393
394#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
395#define ptep_test_and_clear_young(__vma, __addr, __ptep) \
396({ \
397 __ptep_test_and_clear_young((__vma)->vm_mm, __addr, __ptep); \
398})
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413#define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH
414#define ptep_clear_flush_young ptep_test_and_clear_young
415
416#define __HAVE_ARCH_PMDP_CLEAR_YOUNG_FLUSH
417#define pmdp_clear_flush_young pmdp_test_and_clear_young
418
419static inline int __pte_write(pte_t pte)
420{
421 return !!(pte_raw(pte) & cpu_to_be64(_PAGE_WRITE));
422}
423
424#ifdef CONFIG_NUMA_BALANCING
425#define pte_savedwrite pte_savedwrite
426static inline bool pte_savedwrite(pte_t pte)
427{
428
429
430
431
432
433
434
435 return !(pte_raw(pte) & cpu_to_be64(_PAGE_RWX | _PAGE_PRIVILEGED));
436}
437#else
438#define pte_savedwrite pte_savedwrite
439static inline bool pte_savedwrite(pte_t pte)
440{
441 return false;
442}
443#endif
444
445static inline int pte_write(pte_t pte)
446{
447 return __pte_write(pte) || pte_savedwrite(pte);
448}
449
450static inline int pte_read(pte_t pte)
451{
452 return !!(pte_raw(pte) & cpu_to_be64(_PAGE_READ));
453}
454
455#define __HAVE_ARCH_PTEP_SET_WRPROTECT
456static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr,
457 pte_t *ptep)
458{
459 if (__pte_write(*ptep))
460 pte_update(mm, addr, ptep, _PAGE_WRITE, 0, 0);
461 else if (unlikely(pte_savedwrite(*ptep)))
462 pte_update(mm, addr, ptep, 0, _PAGE_PRIVILEGED, 0);
463}
464
465#define __HAVE_ARCH_HUGE_PTEP_SET_WRPROTECT
466static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
467 unsigned long addr, pte_t *ptep)
468{
469
470
471
472
473 if (__pte_write(*ptep))
474 pte_update(mm, addr, ptep, _PAGE_WRITE, 0, 1);
475 else if (unlikely(pte_savedwrite(*ptep)))
476 pte_update(mm, addr, ptep, 0, _PAGE_PRIVILEGED, 1);
477}
478
479#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
480static inline pte_t ptep_get_and_clear(struct mm_struct *mm,
481 unsigned long addr, pte_t *ptep)
482{
483 unsigned long old = pte_update(mm, addr, ptep, ~0UL, 0, 0);
484 return __pte(old);
485}
486
487#define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL
488static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm,
489 unsigned long addr,
490 pte_t *ptep, int full)
491{
492 if (full && radix_enabled()) {
493
494
495
496
497 return radix__ptep_get_and_clear_full(mm, addr, ptep, full);
498 }
499 return ptep_get_and_clear(mm, addr, ptep);
500}
501
502
503static inline void pte_clear(struct mm_struct *mm, unsigned long addr,
504 pte_t * ptep)
505{
506 pte_update(mm, addr, ptep, ~0UL, 0, 0);
507}
508
509static inline int pte_dirty(pte_t pte)
510{
511 return !!(pte_raw(pte) & cpu_to_be64(_PAGE_DIRTY));
512}
513
514static inline int pte_young(pte_t pte)
515{
516 return !!(pte_raw(pte) & cpu_to_be64(_PAGE_ACCESSED));
517}
518
519static inline int pte_special(pte_t pte)
520{
521 return !!(pte_raw(pte) & cpu_to_be64(_PAGE_SPECIAL));
522}
523
524static inline bool pte_exec(pte_t pte)
525{
526 return !!(pte_raw(pte) & cpu_to_be64(_PAGE_EXEC));
527}
528
529
530#ifdef CONFIG_HAVE_ARCH_SOFT_DIRTY
531static inline bool pte_soft_dirty(pte_t pte)
532{
533 return !!(pte_raw(pte) & cpu_to_be64(_PAGE_SOFT_DIRTY));
534}
535
536static inline pte_t pte_mksoft_dirty(pte_t pte)
537{
538 return __pte_raw(pte_raw(pte) | cpu_to_be64(_PAGE_SOFT_DIRTY));
539}
540
541static inline pte_t pte_clear_soft_dirty(pte_t pte)
542{
543 return __pte_raw(pte_raw(pte) & cpu_to_be64(~_PAGE_SOFT_DIRTY));
544}
545#endif
546
547#ifdef CONFIG_NUMA_BALANCING
548static inline int pte_protnone(pte_t pte)
549{
550 return (pte_raw(pte) & cpu_to_be64(_PAGE_PRESENT | _PAGE_PTE | _PAGE_RWX)) ==
551 cpu_to_be64(_PAGE_PRESENT | _PAGE_PTE);
552}
553
554#define pte_mk_savedwrite pte_mk_savedwrite
555static inline pte_t pte_mk_savedwrite(pte_t pte)
556{
557
558
559
560
561
562 VM_BUG_ON((pte_raw(pte) & cpu_to_be64(_PAGE_PRESENT | _PAGE_RWX | _PAGE_PRIVILEGED)) !=
563 cpu_to_be64(_PAGE_PRESENT | _PAGE_PRIVILEGED));
564 return __pte_raw(pte_raw(pte) & cpu_to_be64(~_PAGE_PRIVILEGED));
565}
566
567#define pte_clear_savedwrite pte_clear_savedwrite
568static inline pte_t pte_clear_savedwrite(pte_t pte)
569{
570
571
572
573 VM_BUG_ON(!pte_protnone(pte));
574 return __pte_raw(pte_raw(pte) | cpu_to_be64(_PAGE_PRIVILEGED));
575}
576#else
577#define pte_clear_savedwrite pte_clear_savedwrite
578static inline pte_t pte_clear_savedwrite(pte_t pte)
579{
580 VM_WARN_ON(1);
581 return __pte_raw(pte_raw(pte) & cpu_to_be64(~_PAGE_WRITE));
582}
583#endif
584
585static inline bool pte_hw_valid(pte_t pte)
586{
587 return (pte_raw(pte) & cpu_to_be64(_PAGE_PRESENT | _PAGE_PTE)) ==
588 cpu_to_be64(_PAGE_PRESENT | _PAGE_PTE);
589}
590
591static inline int pte_present(pte_t pte)
592{
593
594
595
596
597
598
599
600 if (pte_hw_valid(pte))
601 return true;
602 return (pte_raw(pte) & cpu_to_be64(_PAGE_INVALID | _PAGE_PTE)) ==
603 cpu_to_be64(_PAGE_INVALID | _PAGE_PTE);
604}
605
606#ifdef CONFIG_PPC_MEM_KEYS
607extern bool arch_pte_access_permitted(u64 pte, bool write, bool execute);
608#else
609static inline bool arch_pte_access_permitted(u64 pte, bool write, bool execute)
610{
611 return true;
612}
613#endif
614
615static inline bool pte_user(pte_t pte)
616{
617 return !(pte_raw(pte) & cpu_to_be64(_PAGE_PRIVILEGED));
618}
619
620#define pte_access_permitted pte_access_permitted
621static inline bool pte_access_permitted(pte_t pte, bool write)
622{
623
624
625
626
627 if (!pte_present(pte) || !pte_user(pte) || !pte_read(pte))
628 return false;
629
630 if (write && !pte_write(pte))
631 return false;
632
633 return arch_pte_access_permitted(pte_val(pte), write, 0);
634}
635
636
637
638
639
640
641
642
643static inline pte_t pfn_pte(unsigned long pfn, pgprot_t pgprot)
644{
645 VM_BUG_ON(pfn >> (64 - PAGE_SHIFT));
646 VM_BUG_ON((pfn << PAGE_SHIFT) & ~PTE_RPN_MASK);
647
648 return __pte(((pte_basic_t)pfn << PAGE_SHIFT) | pgprot_val(pgprot) | _PAGE_PTE);
649}
650
651static inline unsigned long pte_pfn(pte_t pte)
652{
653 return (pte_val(pte) & PTE_RPN_MASK) >> PAGE_SHIFT;
654}
655
656
657static inline pte_t pte_wrprotect(pte_t pte)
658{
659 if (unlikely(pte_savedwrite(pte)))
660 return pte_clear_savedwrite(pte);
661 return __pte_raw(pte_raw(pte) & cpu_to_be64(~_PAGE_WRITE));
662}
663
664static inline pte_t pte_exprotect(pte_t pte)
665{
666 return __pte_raw(pte_raw(pte) & cpu_to_be64(~_PAGE_EXEC));
667}
668
669static inline pte_t pte_mkclean(pte_t pte)
670{
671 return __pte_raw(pte_raw(pte) & cpu_to_be64(~_PAGE_DIRTY));
672}
673
674static inline pte_t pte_mkold(pte_t pte)
675{
676 return __pte_raw(pte_raw(pte) & cpu_to_be64(~_PAGE_ACCESSED));
677}
678
679static inline pte_t pte_mkexec(pte_t pte)
680{
681 return __pte_raw(pte_raw(pte) | cpu_to_be64(_PAGE_EXEC));
682}
683
684static inline pte_t pte_mkwrite(pte_t pte)
685{
686
687
688
689 return __pte_raw(pte_raw(pte) | cpu_to_be64(_PAGE_RW));
690}
691
692static inline pte_t pte_mkdirty(pte_t pte)
693{
694 return __pte_raw(pte_raw(pte) | cpu_to_be64(_PAGE_DIRTY | _PAGE_SOFT_DIRTY));
695}
696
697static inline pte_t pte_mkyoung(pte_t pte)
698{
699 return __pte_raw(pte_raw(pte) | cpu_to_be64(_PAGE_ACCESSED));
700}
701
702static inline pte_t pte_mkspecial(pte_t pte)
703{
704 return __pte_raw(pte_raw(pte) | cpu_to_be64(_PAGE_SPECIAL));
705}
706
707static inline pte_t pte_mkhuge(pte_t pte)
708{
709 return pte;
710}
711
712static inline pte_t pte_mkdevmap(pte_t pte)
713{
714 return __pte_raw(pte_raw(pte) | cpu_to_be64(_PAGE_SPECIAL | _PAGE_DEVMAP));
715}
716
717static inline pte_t pte_mkprivileged(pte_t pte)
718{
719 return __pte_raw(pte_raw(pte) | cpu_to_be64(_PAGE_PRIVILEGED));
720}
721
722static inline pte_t pte_mkuser(pte_t pte)
723{
724 return __pte_raw(pte_raw(pte) & cpu_to_be64(~_PAGE_PRIVILEGED));
725}
726
727
728
729
730
731
732
733static inline int pte_devmap(pte_t pte)
734{
735 u64 mask = cpu_to_be64(_PAGE_DEVMAP | _PAGE_PTE);
736
737 return (pte_raw(pte) & mask) == mask;
738}
739
740static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
741{
742
743 return __pte_raw((pte_raw(pte) & cpu_to_be64(_PAGE_CHG_MASK)) |
744 cpu_to_be64(pgprot_val(newprot)));
745}
746
747
748#define MAX_SWAPFILES_CHECK() do { \
749 BUILD_BUG_ON(MAX_SWAPFILES_SHIFT > SWP_TYPE_BITS); \
750
751
752
753 \
754 BUILD_BUG_ON(_PAGE_HPTEFLAGS & (0x1f << _PAGE_BIT_SWAP_TYPE)); \
755 BUILD_BUG_ON(_PAGE_HPTEFLAGS & _PAGE_SWP_SOFT_DIRTY); \
756 } while (0)
757
758#define SWP_TYPE_BITS 5
759#define __swp_type(x) (((x).val >> _PAGE_BIT_SWAP_TYPE) \
760 & ((1UL << SWP_TYPE_BITS) - 1))
761#define __swp_offset(x) (((x).val & PTE_RPN_MASK) >> PAGE_SHIFT)
762#define __swp_entry(type, offset) ((swp_entry_t) { \
763 ((type) << _PAGE_BIT_SWAP_TYPE) \
764 | (((offset) << PAGE_SHIFT) & PTE_RPN_MASK)})
765
766
767
768
769
770
771#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val((pte)) & ~_PAGE_PTE })
772#define __swp_entry_to_pte(x) __pte((x).val | _PAGE_PTE)
773#define __pmd_to_swp_entry(pmd) (__pte_to_swp_entry(pmd_pte(pmd)))
774#define __swp_entry_to_pmd(x) (pte_pmd(__swp_entry_to_pte(x)))
775
776#ifdef CONFIG_MEM_SOFT_DIRTY
777#define _PAGE_SWP_SOFT_DIRTY (1UL << (SWP_TYPE_BITS + _PAGE_BIT_SWAP_TYPE))
778#else
779#define _PAGE_SWP_SOFT_DIRTY 0UL
780#endif
781
782#ifdef CONFIG_HAVE_ARCH_SOFT_DIRTY
783static inline pte_t pte_swp_mksoft_dirty(pte_t pte)
784{
785 return __pte_raw(pte_raw(pte) | cpu_to_be64(_PAGE_SWP_SOFT_DIRTY));
786}
787
788static inline bool pte_swp_soft_dirty(pte_t pte)
789{
790 return !!(pte_raw(pte) & cpu_to_be64(_PAGE_SWP_SOFT_DIRTY));
791}
792
793static inline pte_t pte_swp_clear_soft_dirty(pte_t pte)
794{
795 return __pte_raw(pte_raw(pte) & cpu_to_be64(~_PAGE_SWP_SOFT_DIRTY));
796}
797#endif
798
799static inline bool check_pte_access(unsigned long access, unsigned long ptev)
800{
801
802
803
804 if (access & ~ptev)
805 return false;
806
807
808
809 if ((access & _PAGE_PRIVILEGED) != (ptev & _PAGE_PRIVILEGED))
810 return false;
811
812 return true;
813}
814
815
816
817
818static inline void __ptep_set_access_flags(struct vm_area_struct *vma,
819 pte_t *ptep, pte_t entry,
820 unsigned long address,
821 int psize)
822{
823 if (radix_enabled())
824 return radix__ptep_set_access_flags(vma, ptep, entry,
825 address, psize);
826 return hash__ptep_set_access_flags(ptep, entry);
827}
828
829#define __HAVE_ARCH_PTE_SAME
830static inline int pte_same(pte_t pte_a, pte_t pte_b)
831{
832 if (radix_enabled())
833 return radix__pte_same(pte_a, pte_b);
834 return hash__pte_same(pte_a, pte_b);
835}
836
837static inline int pte_none(pte_t pte)
838{
839 if (radix_enabled())
840 return radix__pte_none(pte);
841 return hash__pte_none(pte);
842}
843
844static inline void __set_pte_at(struct mm_struct *mm, unsigned long addr,
845 pte_t *ptep, pte_t pte, int percpu)
846{
847
848 VM_WARN_ON(!(pte_raw(pte) & cpu_to_be64(_PAGE_PTE)));
849
850
851
852
853 pte = __pte_raw(pte_raw(pte) | cpu_to_be64(_PAGE_PTE));
854
855 if (radix_enabled())
856 return radix__set_pte_at(mm, addr, ptep, pte, percpu);
857 return hash__set_pte_at(mm, addr, ptep, pte, percpu);
858}
859
860#define _PAGE_CACHE_CTL (_PAGE_SAO | _PAGE_NON_IDEMPOTENT | _PAGE_TOLERANT)
861
862#define pgprot_noncached pgprot_noncached
863static inline pgprot_t pgprot_noncached(pgprot_t prot)
864{
865 return __pgprot((pgprot_val(prot) & ~_PAGE_CACHE_CTL) |
866 _PAGE_NON_IDEMPOTENT);
867}
868
869#define pgprot_noncached_wc pgprot_noncached_wc
870static inline pgprot_t pgprot_noncached_wc(pgprot_t prot)
871{
872 return __pgprot((pgprot_val(prot) & ~_PAGE_CACHE_CTL) |
873 _PAGE_TOLERANT);
874}
875
876#define pgprot_cached pgprot_cached
877static inline pgprot_t pgprot_cached(pgprot_t prot)
878{
879 return __pgprot((pgprot_val(prot) & ~_PAGE_CACHE_CTL));
880}
881
882#define pgprot_writecombine pgprot_writecombine
883static inline pgprot_t pgprot_writecombine(pgprot_t prot)
884{
885 return pgprot_noncached_wc(prot);
886}
887
888
889
890static inline bool pte_ci(pte_t pte)
891{
892 __be64 pte_v = pte_raw(pte);
893
894 if (((pte_v & cpu_to_be64(_PAGE_CACHE_CTL)) == cpu_to_be64(_PAGE_TOLERANT)) ||
895 ((pte_v & cpu_to_be64(_PAGE_CACHE_CTL)) == cpu_to_be64(_PAGE_NON_IDEMPOTENT)))
896 return true;
897 return false;
898}
899
900static inline void pmd_clear(pmd_t *pmdp)
901{
902 if (IS_ENABLED(CONFIG_DEBUG_VM) && !radix_enabled()) {
903
904
905
906
907 WARN_ON((pmd_val(*pmdp) & (H_PAGE_HASHPTE | _PAGE_PTE)) == (H_PAGE_HASHPTE | _PAGE_PTE));
908 }
909 *pmdp = __pmd(0);
910}
911
912static inline int pmd_none(pmd_t pmd)
913{
914 return !pmd_raw(pmd);
915}
916
917static inline int pmd_present(pmd_t pmd)
918{
919
920
921
922
923
924
925 if (pmd_raw(pmd) & cpu_to_be64(_PAGE_PRESENT | _PAGE_INVALID))
926 return true;
927
928 return false;
929}
930
931static inline int pmd_is_serializing(pmd_t pmd)
932{
933
934
935
936
937
938
939
940
941 if ((pmd_raw(pmd) & cpu_to_be64(_PAGE_PRESENT | _PAGE_INVALID)) ==
942 cpu_to_be64(_PAGE_INVALID))
943 return true;
944
945 return false;
946}
947
948static inline int pmd_bad(pmd_t pmd)
949{
950 if (radix_enabled())
951 return radix__pmd_bad(pmd);
952 return hash__pmd_bad(pmd);
953}
954
955static inline void pud_clear(pud_t *pudp)
956{
957 if (IS_ENABLED(CONFIG_DEBUG_VM) && !radix_enabled()) {
958
959
960
961
962 WARN_ON((pud_val(*pudp) & (H_PAGE_HASHPTE | _PAGE_PTE)) == (H_PAGE_HASHPTE | _PAGE_PTE));
963 }
964 *pudp = __pud(0);
965}
966
967static inline int pud_none(pud_t pud)
968{
969 return !pud_raw(pud);
970}
971
972static inline int pud_present(pud_t pud)
973{
974 return !!(pud_raw(pud) & cpu_to_be64(_PAGE_PRESENT));
975}
976
977extern struct page *pud_page(pud_t pud);
978extern struct page *pmd_page(pmd_t pmd);
979static inline pte_t pud_pte(pud_t pud)
980{
981 return __pte_raw(pud_raw(pud));
982}
983
984static inline pud_t pte_pud(pte_t pte)
985{
986 return __pud_raw(pte_raw(pte));
987}
988#define pud_write(pud) pte_write(pud_pte(pud))
989
990static inline int pud_bad(pud_t pud)
991{
992 if (radix_enabled())
993 return radix__pud_bad(pud);
994 return hash__pud_bad(pud);
995}
996
997#define pud_access_permitted pud_access_permitted
998static inline bool pud_access_permitted(pud_t pud, bool write)
999{
1000 return pte_access_permitted(pud_pte(pud), write);
1001}
1002
1003#define __p4d_raw(x) ((p4d_t) { __pgd_raw(x) })
1004static inline __be64 p4d_raw(p4d_t x)
1005{
1006 return pgd_raw(x.pgd);
1007}
1008
1009#define p4d_write(p4d) pte_write(p4d_pte(p4d))
1010
1011static inline void p4d_clear(p4d_t *p4dp)
1012{
1013 *p4dp = __p4d(0);
1014}
1015
1016static inline int p4d_none(p4d_t p4d)
1017{
1018 return !p4d_raw(p4d);
1019}
1020
1021static inline int p4d_present(p4d_t p4d)
1022{
1023 return !!(p4d_raw(p4d) & cpu_to_be64(_PAGE_PRESENT));
1024}
1025
1026static inline pte_t p4d_pte(p4d_t p4d)
1027{
1028 return __pte_raw(p4d_raw(p4d));
1029}
1030
1031static inline p4d_t pte_p4d(pte_t pte)
1032{
1033 return __p4d_raw(pte_raw(pte));
1034}
1035
1036static inline int p4d_bad(p4d_t p4d)
1037{
1038 if (radix_enabled())
1039 return radix__p4d_bad(p4d);
1040 return hash__p4d_bad(p4d);
1041}
1042
1043#define p4d_access_permitted p4d_access_permitted
1044static inline bool p4d_access_permitted(p4d_t p4d, bool write)
1045{
1046 return pte_access_permitted(p4d_pte(p4d), write);
1047}
1048
1049extern struct page *p4d_page(p4d_t p4d);
1050
1051
1052#define __pgtable_ptr_val(ptr) __pa(ptr)
1053
1054static inline pud_t *p4d_pgtable(p4d_t p4d)
1055{
1056 return (pud_t *)__va(p4d_val(p4d) & ~P4D_MASKED_BITS);
1057}
1058
1059static inline pmd_t *pud_pgtable(pud_t pud)
1060{
1061 return (pmd_t *)__va(pud_val(pud) & ~PUD_MASKED_BITS);
1062}
1063
1064#define pte_ERROR(e) \
1065 pr_err("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e))
1066#define pmd_ERROR(e) \
1067 pr_err("%s:%d: bad pmd %08lx.\n", __FILE__, __LINE__, pmd_val(e))
1068#define pud_ERROR(e) \
1069 pr_err("%s:%d: bad pud %08lx.\n", __FILE__, __LINE__, pud_val(e))
1070#define pgd_ERROR(e) \
1071 pr_err("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e))
1072
1073static inline int map_kernel_page(unsigned long ea, unsigned long pa, pgprot_t prot)
1074{
1075 if (radix_enabled()) {
1076#if defined(CONFIG_PPC_RADIX_MMU) && defined(DEBUG_VM)
1077 unsigned long page_size = 1 << mmu_psize_defs[mmu_io_psize].shift;
1078 WARN((page_size != PAGE_SIZE), "I/O page size != PAGE_SIZE");
1079#endif
1080 return radix__map_kernel_page(ea, pa, prot, PAGE_SIZE);
1081 }
1082 return hash__map_kernel_page(ea, pa, prot);
1083}
1084
1085static inline int __meminit vmemmap_create_mapping(unsigned long start,
1086 unsigned long page_size,
1087 unsigned long phys)
1088{
1089 if (radix_enabled())
1090 return radix__vmemmap_create_mapping(start, page_size, phys);
1091 return hash__vmemmap_create_mapping(start, page_size, phys);
1092}
1093
1094#ifdef CONFIG_MEMORY_HOTPLUG
1095static inline void vmemmap_remove_mapping(unsigned long start,
1096 unsigned long page_size)
1097{
1098 if (radix_enabled())
1099 return radix__vmemmap_remove_mapping(start, page_size);
1100 return hash__vmemmap_remove_mapping(start, page_size);
1101}
1102#endif
1103
1104static inline pte_t pmd_pte(pmd_t pmd)
1105{
1106 return __pte_raw(pmd_raw(pmd));
1107}
1108
1109static inline pmd_t pte_pmd(pte_t pte)
1110{
1111 return __pmd_raw(pte_raw(pte));
1112}
1113
1114static inline pte_t *pmdp_ptep(pmd_t *pmd)
1115{
1116 return (pte_t *)pmd;
1117}
1118#define pmd_pfn(pmd) pte_pfn(pmd_pte(pmd))
1119#define pmd_dirty(pmd) pte_dirty(pmd_pte(pmd))
1120#define pmd_young(pmd) pte_young(pmd_pte(pmd))
1121#define pmd_mkold(pmd) pte_pmd(pte_mkold(pmd_pte(pmd)))
1122#define pmd_wrprotect(pmd) pte_pmd(pte_wrprotect(pmd_pte(pmd)))
1123#define pmd_mkdirty(pmd) pte_pmd(pte_mkdirty(pmd_pte(pmd)))
1124#define pmd_mkclean(pmd) pte_pmd(pte_mkclean(pmd_pte(pmd)))
1125#define pmd_mkyoung(pmd) pte_pmd(pte_mkyoung(pmd_pte(pmd)))
1126#define pmd_mkwrite(pmd) pte_pmd(pte_mkwrite(pmd_pte(pmd)))
1127#define pmd_mk_savedwrite(pmd) pte_pmd(pte_mk_savedwrite(pmd_pte(pmd)))
1128#define pmd_clear_savedwrite(pmd) pte_pmd(pte_clear_savedwrite(pmd_pte(pmd)))
1129
1130#ifdef CONFIG_HAVE_ARCH_SOFT_DIRTY
1131#define pmd_soft_dirty(pmd) pte_soft_dirty(pmd_pte(pmd))
1132#define pmd_mksoft_dirty(pmd) pte_pmd(pte_mksoft_dirty(pmd_pte(pmd)))
1133#define pmd_clear_soft_dirty(pmd) pte_pmd(pte_clear_soft_dirty(pmd_pte(pmd)))
1134
1135#ifdef CONFIG_ARCH_ENABLE_THP_MIGRATION
1136#define pmd_swp_mksoft_dirty(pmd) pte_pmd(pte_swp_mksoft_dirty(pmd_pte(pmd)))
1137#define pmd_swp_soft_dirty(pmd) pte_swp_soft_dirty(pmd_pte(pmd))
1138#define pmd_swp_clear_soft_dirty(pmd) pte_pmd(pte_swp_clear_soft_dirty(pmd_pte(pmd)))
1139#endif
1140#endif
1141
1142#ifdef CONFIG_NUMA_BALANCING
1143static inline int pmd_protnone(pmd_t pmd)
1144{
1145 return pte_protnone(pmd_pte(pmd));
1146}
1147#endif
1148
1149#define pmd_write(pmd) pte_write(pmd_pte(pmd))
1150#define __pmd_write(pmd) __pte_write(pmd_pte(pmd))
1151#define pmd_savedwrite(pmd) pte_savedwrite(pmd_pte(pmd))
1152
1153#define pmd_access_permitted pmd_access_permitted
1154static inline bool pmd_access_permitted(pmd_t pmd, bool write)
1155{
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166 if (pmd_is_serializing(pmd))
1167 return false;
1168
1169 return pte_access_permitted(pmd_pte(pmd), write);
1170}
1171
1172#ifdef CONFIG_TRANSPARENT_HUGEPAGE
1173extern pmd_t pfn_pmd(unsigned long pfn, pgprot_t pgprot);
1174extern pmd_t mk_pmd(struct page *page, pgprot_t pgprot);
1175extern pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot);
1176extern void set_pmd_at(struct mm_struct *mm, unsigned long addr,
1177 pmd_t *pmdp, pmd_t pmd);
1178static inline void update_mmu_cache_pmd(struct vm_area_struct *vma,
1179 unsigned long addr, pmd_t *pmd)
1180{
1181}
1182
1183extern int hash__has_transparent_hugepage(void);
1184static inline int has_transparent_hugepage(void)
1185{
1186 if (radix_enabled())
1187 return radix__has_transparent_hugepage();
1188 return hash__has_transparent_hugepage();
1189}
1190#define has_transparent_hugepage has_transparent_hugepage
1191
1192static inline unsigned long
1193pmd_hugepage_update(struct mm_struct *mm, unsigned long addr, pmd_t *pmdp,
1194 unsigned long clr, unsigned long set)
1195{
1196 if (radix_enabled())
1197 return radix__pmd_hugepage_update(mm, addr, pmdp, clr, set);
1198 return hash__pmd_hugepage_update(mm, addr, pmdp, clr, set);
1199}
1200
1201
1202
1203
1204
1205static inline int pmd_large(pmd_t pmd)
1206{
1207 return !!(pmd_raw(pmd) & cpu_to_be64(_PAGE_PTE));
1208}
1209
1210
1211
1212
1213
1214static inline int __pmdp_test_and_clear_young(struct mm_struct *mm,
1215 unsigned long addr, pmd_t *pmdp)
1216{
1217 unsigned long old;
1218
1219 if ((pmd_raw(*pmdp) & cpu_to_be64(_PAGE_ACCESSED | H_PAGE_HASHPTE)) == 0)
1220 return 0;
1221 old = pmd_hugepage_update(mm, addr, pmdp, _PAGE_ACCESSED, 0);
1222 return ((old & _PAGE_ACCESSED) != 0);
1223}
1224
1225#define __HAVE_ARCH_PMDP_SET_WRPROTECT
1226static inline void pmdp_set_wrprotect(struct mm_struct *mm, unsigned long addr,
1227 pmd_t *pmdp)
1228{
1229 if (__pmd_write((*pmdp)))
1230 pmd_hugepage_update(mm, addr, pmdp, _PAGE_WRITE, 0);
1231 else if (unlikely(pmd_savedwrite(*pmdp)))
1232 pmd_hugepage_update(mm, addr, pmdp, 0, _PAGE_PRIVILEGED);
1233}
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246static inline int pmd_trans_huge(pmd_t pmd)
1247{
1248 if (!pmd_present(pmd))
1249 return false;
1250
1251 if (radix_enabled())
1252 return radix__pmd_trans_huge(pmd);
1253 return hash__pmd_trans_huge(pmd);
1254}
1255
1256#define __HAVE_ARCH_PMD_SAME
1257static inline int pmd_same(pmd_t pmd_a, pmd_t pmd_b)
1258{
1259 if (radix_enabled())
1260 return radix__pmd_same(pmd_a, pmd_b);
1261 return hash__pmd_same(pmd_a, pmd_b);
1262}
1263
1264static inline pmd_t __pmd_mkhuge(pmd_t pmd)
1265{
1266 if (radix_enabled())
1267 return radix__pmd_mkhuge(pmd);
1268 return hash__pmd_mkhuge(pmd);
1269}
1270
1271
1272
1273
1274static inline pmd_t pmd_mkhuge(pmd_t pmd)
1275{
1276#ifdef CONFIG_DEBUG_VM
1277 if (radix_enabled())
1278 WARN_ON((pmd_raw(pmd) & cpu_to_be64(_PAGE_PTE)) == 0);
1279 else
1280 WARN_ON((pmd_raw(pmd) & cpu_to_be64(_PAGE_PTE | H_PAGE_THP_HUGE)) !=
1281 cpu_to_be64(_PAGE_PTE | H_PAGE_THP_HUGE));
1282#endif
1283 return pmd;
1284}
1285
1286#define __HAVE_ARCH_PMDP_SET_ACCESS_FLAGS
1287extern int pmdp_set_access_flags(struct vm_area_struct *vma,
1288 unsigned long address, pmd_t *pmdp,
1289 pmd_t entry, int dirty);
1290
1291#define __HAVE_ARCH_PMDP_TEST_AND_CLEAR_YOUNG
1292extern int pmdp_test_and_clear_young(struct vm_area_struct *vma,
1293 unsigned long address, pmd_t *pmdp);
1294
1295#define __HAVE_ARCH_PMDP_HUGE_GET_AND_CLEAR
1296static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm,
1297 unsigned long addr, pmd_t *pmdp)
1298{
1299 if (radix_enabled())
1300 return radix__pmdp_huge_get_and_clear(mm, addr, pmdp);
1301 return hash__pmdp_huge_get_and_clear(mm, addr, pmdp);
1302}
1303
1304static inline pmd_t pmdp_collapse_flush(struct vm_area_struct *vma,
1305 unsigned long address, pmd_t *pmdp)
1306{
1307 if (radix_enabled())
1308 return radix__pmdp_collapse_flush(vma, address, pmdp);
1309 return hash__pmdp_collapse_flush(vma, address, pmdp);
1310}
1311#define pmdp_collapse_flush pmdp_collapse_flush
1312
1313#define __HAVE_ARCH_PMDP_HUGE_GET_AND_CLEAR_FULL
1314pmd_t pmdp_huge_get_and_clear_full(struct vm_area_struct *vma,
1315 unsigned long addr,
1316 pmd_t *pmdp, int full);
1317
1318#define __HAVE_ARCH_PGTABLE_DEPOSIT
1319static inline void pgtable_trans_huge_deposit(struct mm_struct *mm,
1320 pmd_t *pmdp, pgtable_t pgtable)
1321{
1322 if (radix_enabled())
1323 return radix__pgtable_trans_huge_deposit(mm, pmdp, pgtable);
1324 return hash__pgtable_trans_huge_deposit(mm, pmdp, pgtable);
1325}
1326
1327#define __HAVE_ARCH_PGTABLE_WITHDRAW
1328static inline pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm,
1329 pmd_t *pmdp)
1330{
1331 if (radix_enabled())
1332 return radix__pgtable_trans_huge_withdraw(mm, pmdp);
1333 return hash__pgtable_trans_huge_withdraw(mm, pmdp);
1334}
1335
1336#define __HAVE_ARCH_PMDP_INVALIDATE
1337extern pmd_t pmdp_invalidate(struct vm_area_struct *vma, unsigned long address,
1338 pmd_t *pmdp);
1339
1340#define pmd_move_must_withdraw pmd_move_must_withdraw
1341struct spinlock;
1342extern int pmd_move_must_withdraw(struct spinlock *new_pmd_ptl,
1343 struct spinlock *old_pmd_ptl,
1344 struct vm_area_struct *vma);
1345
1346
1347
1348
1349#define arch_needs_pgtable_deposit arch_needs_pgtable_deposit
1350static inline bool arch_needs_pgtable_deposit(void)
1351{
1352 if (radix_enabled())
1353 return false;
1354 return true;
1355}
1356extern void serialize_against_pte_lookup(struct mm_struct *mm);
1357
1358
1359static inline pmd_t pmd_mkdevmap(pmd_t pmd)
1360{
1361 if (radix_enabled())
1362 return radix__pmd_mkdevmap(pmd);
1363 return hash__pmd_mkdevmap(pmd);
1364}
1365
1366static inline int pmd_devmap(pmd_t pmd)
1367{
1368 return pte_devmap(pmd_pte(pmd));
1369}
1370
1371static inline int pud_devmap(pud_t pud)
1372{
1373 return 0;
1374}
1375
1376static inline int pgd_devmap(pgd_t pgd)
1377{
1378 return 0;
1379}
1380#endif
1381
1382static inline int pud_pfn(pud_t pud)
1383{
1384
1385
1386
1387
1388
1389 BUILD_BUG();
1390 return 0;
1391}
1392#define __HAVE_ARCH_PTEP_MODIFY_PROT_TRANSACTION
1393pte_t ptep_modify_prot_start(struct vm_area_struct *, unsigned long, pte_t *);
1394void ptep_modify_prot_commit(struct vm_area_struct *, unsigned long,
1395 pte_t *, pte_t, pte_t);
1396
1397
1398
1399
1400static inline bool is_pte_rw_upgrade(unsigned long old_val, unsigned long new_val)
1401{
1402 if (!(old_val & _PAGE_READ))
1403 return false;
1404
1405 if ((!(old_val & _PAGE_WRITE)) && (new_val & _PAGE_WRITE))
1406 return true;
1407
1408 return false;
1409}
1410
1411
1412
1413
1414#define pmd_is_leaf pmd_is_leaf
1415#define pmd_leaf pmd_is_leaf
1416static inline bool pmd_is_leaf(pmd_t pmd)
1417{
1418 return !!(pmd_raw(pmd) & cpu_to_be64(_PAGE_PTE));
1419}
1420
1421#define pud_is_leaf pud_is_leaf
1422#define pud_leaf pud_is_leaf
1423static inline bool pud_is_leaf(pud_t pud)
1424{
1425 return !!(pud_raw(pud) & cpu_to_be64(_PAGE_PTE));
1426}
1427
1428#define p4d_is_leaf p4d_is_leaf
1429#define p4d_leaf p4d_is_leaf
1430static inline bool p4d_is_leaf(p4d_t p4d)
1431{
1432 return !!(p4d_raw(p4d) & cpu_to_be64(_PAGE_PTE));
1433}
1434
1435#endif
1436#endif
1437