xref: /linux/arch/x86/include/asm/hugetlb.h (revision c4ee0af3fa0dc65f690fc908f02b8355f9576ea0) 
1 #ifndef _ASM_X86_HUGETLB_H
2 #define _ASM_X86_HUGETLB_H
3 
4 #include <asm/page.h>
5 #include <asm-generic/hugetlb.h>
6 
7 
8 static inline int is_hugepage_only_range(struct mm_struct *mm,
9 					 unsigned long addr,
10 					 unsigned long len) {
11 	return 0;
12 }
13 
14 /*
15  * If the arch doesn't supply something else, assume that hugepage
16  * size aligned regions are ok without further preparation.
17  */
18 static inline int prepare_hugepage_range(struct file *file,
19 			unsigned long addr, unsigned long len)
20 {
21 	struct hstate *h = hstate_file(file);
22 	if (len & ~huge_page_mask(h))
23 		return -EINVAL;
24 	if (addr & ~huge_page_mask(h))
25 		return -EINVAL;
26 	return 0;
27 }
28 
29 static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm) {
30 }
31 
32 static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb,
33 					  unsigned long addr, unsigned long end,
34 					  unsigned long floor,
35 					  unsigned long ceiling)
36 {
37 	free_pgd_range(tlb, addr, end, floor, ceiling);
38 }
39 
40 static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
41 				   pte_t *ptep, pte_t pte)
42 {
43 	set_pte_at(mm, addr, ptep, pte);
44 }
45 
46 static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
47 					    unsigned long addr, pte_t *ptep)
48 {
49 	return ptep_get_and_clear(mm, addr, ptep);
50 }
51 
52 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
53 					 unsigned long addr, pte_t *ptep)
54 {
55 }
56 
57 static inline int huge_pte_none(pte_t pte)
58 {
59 	return pte_none(pte);
60 }
61 
62 static inline pte_t huge_pte_wrprotect(pte_t pte)
63 {
64 	return pte_wrprotect(pte);
65 }
66 
67 static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
68 					   unsigned long addr, pte_t *ptep)
69 {
70 	ptep_set_wrprotect(mm, addr, ptep);
71 }
72 
73 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
74 					     unsigned long addr, pte_t *ptep,
75 					     pte_t pte, int dirty)
76 {
77 	return ptep_set_access_flags(vma, addr, ptep, pte, dirty);
78 }
79 
80 static inline pte_t huge_ptep_get(pte_t *ptep)
81 {
82 	return *ptep;
83 }
84 
85 static inline int arch_prepare_hugepage(struct page *page)
86 {
87 	return 0;
88 }
89 
90 static inline void arch_release_hugepage(struct page *page)
91 {
92 }
93 
94 static inline void arch_clear_hugepage_flags(struct page *page)
95 {
96 }
97 
98 #endif /* _ASM_X86_HUGETLB_H */
99