xref: /linux/arch/x86/include/asm/hugetlb.h (revision 0d456bad36d42d16022be045c8a53ddbb59ee478) 
1 #ifndef _ASM_X86_HUGETLB_H
2 #define _ASM_X86_HUGETLB_H
3 
4 #include <asm/page.h>
5 
6 
7 static inline int is_hugepage_only_range(struct mm_struct *mm,
8 					 unsigned long addr,
9 					 unsigned long len) {
10 	return 0;
11 }
12 
13 /*
14  * If the arch doesn't supply something else, assume that hugepage
15  * size aligned regions are ok without further preparation.
16  */
17 static inline int prepare_hugepage_range(struct file *file,
18 			unsigned long addr, unsigned long len)
19 {
20 	struct hstate *h = hstate_file(file);
21 	if (len & ~huge_page_mask(h))
22 		return -EINVAL;
23 	if (addr & ~huge_page_mask(h))
24 		return -EINVAL;
25 	return 0;
26 }
27 
28 static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm) {
29 }
30 
31 static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb,
32 					  unsigned long addr, unsigned long end,
33 					  unsigned long floor,
34 					  unsigned long ceiling)
35 {
36 	free_pgd_range(tlb, addr, end, floor, ceiling);
37 }
38 
39 static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
40 				   pte_t *ptep, pte_t pte)
41 {
42 	set_pte_at(mm, addr, ptep, pte);
43 }
44 
45 static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
46 					    unsigned long addr, pte_t *ptep)
47 {
48 	return ptep_get_and_clear(mm, addr, ptep);
49 }
50 
51 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
52 					 unsigned long addr, pte_t *ptep)
53 {
54 }
55 
56 static inline int huge_pte_none(pte_t pte)
57 {
58 	return pte_none(pte);
59 }
60 
61 static inline pte_t huge_pte_wrprotect(pte_t pte)
62 {
63 	return pte_wrprotect(pte);
64 }
65 
66 static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
67 					   unsigned long addr, pte_t *ptep)
68 {
69 	ptep_set_wrprotect(mm, addr, ptep);
70 }
71 
72 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
73 					     unsigned long addr, pte_t *ptep,
74 					     pte_t pte, int dirty)
75 {
76 	return ptep_set_access_flags(vma, addr, ptep, pte, dirty);
77 }
78 
79 static inline pte_t huge_ptep_get(pte_t *ptep)
80 {
81 	return *ptep;
82 }
83 
84 static inline int arch_prepare_hugepage(struct page *page)
85 {
86 	return 0;
87 }
88 
89 static inline void arch_release_hugepage(struct page *page)
90 {
91 }
92 
93 static inline void arch_clear_hugepage_flags(struct page *page)
94 {
95 }
96 
97 #endif /* _ASM_X86_HUGETLB_H */
98