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hugetlb.h

hugetlb.h 2.1 KB
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  1. /* SPDX-License-Identifier: GPL-2.0 */
    2. 

  2. #ifndef _ASM_SPARC64_HUGETLB_H
    3. 

  3. #define _ASM_SPARC64_HUGETLB_H
    4. 

  4. 

  5. #include <asm/page.h>
    6. 

  6. #include <asm-generic/hugetlb.h>
    7. 

  7. 

  8. #ifdef CONFIG_HUGETLB_PAGE
    9. 

  9. struct pud_huge_patch_entry {
    10. 

  10. 	unsigned int addr;
    11. 

  11. 	unsigned int insn;
    12. 

  12. };
    13. 

  13. extern struct pud_huge_patch_entry __pud_huge_patch, __pud_huge_patch_end;
    14. 

  14. #endif
    15. 

  15. 

  16. void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
    17. 

  17. 		     pte_t *ptep, pte_t pte);
    18. 

  18. 

  19. pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
    20. 

  20. 			      pte_t *ptep);
    21. 

  21. 

  22. static inline int is_hugepage_only_range(struct mm_struct *mm,
    23. 

  23. 					 unsigned long addr,
    24. 

  24. 					 unsigned long len) {
    25. 

  25. 	return 0;
    26. 

  26. }
    27. 

  27. 

  28. /*
    29. 

  29.  * If the arch doesn't supply something else, assume that hugepage
    30. 

  30.  * size aligned regions are ok without further preparation.
    31. 

  31.  */
    32. 

  32. static inline int prepare_hugepage_range(struct file *file,
    33. 

  33. 			unsigned long addr, unsigned long len)
    34. 

  34. {
    35. 

  35. 	struct hstate *h = hstate_file(file);
    36. 

  36. 

  37. 	if (len & ~huge_page_mask(h))
    38. 

  38. 		return -EINVAL;
    39. 

  39. 	if (addr & ~huge_page_mask(h))
    40. 

  40. 		return -EINVAL;
    41. 

  41. 	return 0;
    42. 

  42. }
    43. 

  43. 

  44. static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
    45. 

  45. 					 unsigned long addr, pte_t *ptep)
    46. 

  46. {
    47. 

  47. }
    48. 

  48. 

  49. static inline int huge_pte_none(pte_t pte)
    50. 

  50. {
    51. 

  51. 	return pte_none(pte);
    52. 

  52. }
    53. 

  53. 

  54. static inline pte_t huge_pte_wrprotect(pte_t pte)
    55. 

  55. {
    56. 

  56. 	return pte_wrprotect(pte);
    57. 

  57. }
    58. 

  58. 

  59. static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
    60. 

  60. 					   unsigned long addr, pte_t *ptep)
    61. 

  61. {
    62. 

  62. 	pte_t old_pte = *ptep;
    63. 

  63. 	set_huge_pte_at(mm, addr, ptep, pte_wrprotect(old_pte));
    64. 

  64. }
    65. 

  65. 

  66. static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
    67. 

  67. 					     unsigned long addr, pte_t *ptep,
    68. 

  68. 					     pte_t pte, int dirty)
    69. 

  69. {
    70. 

  70. 	int changed = !pte_same(*ptep, pte);
    71. 

  71. 	if (changed) {
    72. 

  72. 		set_huge_pte_at(vma->vm_mm, addr, ptep, pte);
    73. 

  73. 		flush_tlb_page(vma, addr);
    74. 

  74. 	}
    75. 

  75. 	return changed;
    76. 

  76. }
    77. 

  77. 

  78. static inline pte_t huge_ptep_get(pte_t *ptep)
    79. 

  79. {
    80. 

  80. 	return *ptep;
    81. 

  81. }
    82. 

  82. 

  83. static inline void arch_clear_hugepage_flags(struct page *page)
    84. 

  84. {
    85. 

  85. }
    86. 

  86. 

  87. void hugetlb_free_pgd_range(struct mmu_gather *tlb, unsigned long addr,
    88. 

  88. 			    unsigned long end, unsigned long floor,
    89. 

  89. 			    unsigned long ceiling);
    90. 

  90. 

  91. #endif /* _ASM_SPARC64_HUGETLB_H */
    92.