xref: /openbmc/linux/arch/x86/include/asm/hugetlb.h (revision a8da474e) 
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_free_pgd_range(struct mmu_gather *tlb,
30 					  unsigned long addr, unsigned long end,
31 					  unsigned long floor,
32 					  unsigned long ceiling)
33 {
34 	free_pgd_range(tlb, addr, end, floor, ceiling);
35 }
36 
37 static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
38 				   pte_t *ptep, pte_t pte)
39 {
40 	set_pte_at(mm, addr, ptep, pte);
41 }
42 
43 static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
44 					    unsigned long addr, pte_t *ptep)
45 {
46 	return ptep_get_and_clear(mm, addr, ptep);
47 }
48 
49 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
50 					 unsigned long addr, pte_t *ptep)
51 {
52 	ptep_clear_flush(vma, addr, ptep);
53 }
54 
55 static inline int huge_pte_none(pte_t pte)
56 {
57 	return pte_none(pte);
58 }
59 
60 static inline pte_t huge_pte_wrprotect(pte_t pte)
61 {
62 	return pte_wrprotect(pte);
63 }
64 
65 static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
66 					   unsigned long addr, pte_t *ptep)
67 {
68 	ptep_set_wrprotect(mm, addr, ptep);
69 }
70 
71 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
72 					     unsigned long addr, pte_t *ptep,
73 					     pte_t pte, int dirty)
74 {
75 	return ptep_set_access_flags(vma, addr, ptep, pte, dirty);
76 }
77 
78 static inline pte_t huge_ptep_get(pte_t *ptep)
79 {
80 	return *ptep;
81 }
82 
83 static inline void arch_clear_hugepage_flags(struct page *page)
84 {
85 }
86 
87 #endif /* _ASM_X86_HUGETLB_H */
88