1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_POWERPC_HUGETLB_H
3 #define _ASM_POWERPC_HUGETLB_H
4
5 #ifdef CONFIG_HUGETLB_PAGE
6 #include <asm/page.h>
7 #include <asm-generic/hugetlb.h>
8
9 extern struct kmem_cache *hugepte_cache;
10
11 #ifdef CONFIG_PPC_BOOK3S_64
12
13 #include <asm/book3s/64/hugetlb.h>
14 /*
15 * This should work for other subarchs too. But right now we use the
16 * new format only for 64bit book3s
17 */
hugepd_page(hugepd_t hpd)18 static inline pte_t *hugepd_page(hugepd_t hpd)
19 {
20 BUG_ON(!hugepd_ok(hpd));
21 /*
22 * We have only four bits to encode, MMU page size
23 */
24 BUILD_BUG_ON((MMU_PAGE_COUNT - 1) > 0xf);
25 return __va(hpd_val(hpd) & HUGEPD_ADDR_MASK);
26 }
27
hugepd_mmu_psize(hugepd_t hpd)28 static inline unsigned int hugepd_mmu_psize(hugepd_t hpd)
29 {
30 return (hpd_val(hpd) & HUGEPD_SHIFT_MASK) >> 2;
31 }
32
hugepd_shift(hugepd_t hpd)33 static inline unsigned int hugepd_shift(hugepd_t hpd)
34 {
35 return mmu_psize_to_shift(hugepd_mmu_psize(hpd));
36 }
flush_hugetlb_page(struct vm_area_struct * vma,unsigned long vmaddr)37 static inline void flush_hugetlb_page(struct vm_area_struct *vma,
38 unsigned long vmaddr)
39 {
40 if (radix_enabled())
41 return radix__flush_hugetlb_page(vma, vmaddr);
42 }
43
44 #else
45
hugepd_page(hugepd_t hpd)46 static inline pte_t *hugepd_page(hugepd_t hpd)
47 {
48 BUG_ON(!hugepd_ok(hpd));
49 #ifdef CONFIG_PPC_8xx
50 return (pte_t *)__va(hpd_val(hpd) & ~HUGEPD_SHIFT_MASK);
51 #else
52 return (pte_t *)((hpd_val(hpd) &
53 ~HUGEPD_SHIFT_MASK) | PD_HUGE);
54 #endif
55 }
56
hugepd_shift(hugepd_t hpd)57 static inline unsigned int hugepd_shift(hugepd_t hpd)
58 {
59 #ifdef CONFIG_PPC_8xx
60 return ((hpd_val(hpd) & _PMD_PAGE_MASK) >> 1) + 17;
61 #else
62 return hpd_val(hpd) & HUGEPD_SHIFT_MASK;
63 #endif
64 }
65
66 #endif /* CONFIG_PPC_BOOK3S_64 */
67
68
hugepte_offset(hugepd_t hpd,unsigned long addr,unsigned pdshift)69 static inline pte_t *hugepte_offset(hugepd_t hpd, unsigned long addr,
70 unsigned pdshift)
71 {
72 /*
73 * On FSL BookE, we have multiple higher-level table entries that
74 * point to the same hugepte. Just use the first one since they're all
75 * identical. So for that case, idx=0.
76 */
77 unsigned long idx = 0;
78
79 pte_t *dir = hugepd_page(hpd);
80 #ifndef CONFIG_PPC_FSL_BOOK3E
81 idx = (addr & ((1UL << pdshift) - 1)) >> hugepd_shift(hpd);
82 #endif
83
84 return dir + idx;
85 }
86
87 void flush_dcache_icache_hugepage(struct page *page);
88
89 int slice_is_hugepage_only_range(struct mm_struct *mm, unsigned long addr,
90 unsigned long len);
91
is_hugepage_only_range(struct mm_struct * mm,unsigned long addr,unsigned long len)92 static inline int is_hugepage_only_range(struct mm_struct *mm,
93 unsigned long addr,
94 unsigned long len)
95 {
96 if (IS_ENABLED(CONFIG_PPC_MM_SLICES) && !radix_enabled())
97 return slice_is_hugepage_only_range(mm, addr, len);
98 return 0;
99 }
100
101 void book3e_hugetlb_preload(struct vm_area_struct *vma, unsigned long ea,
102 pte_t pte);
103 #ifdef CONFIG_PPC_8xx
flush_hugetlb_page(struct vm_area_struct * vma,unsigned long vmaddr)104 static inline void flush_hugetlb_page(struct vm_area_struct *vma,
105 unsigned long vmaddr)
106 {
107 flush_tlb_page(vma, vmaddr);
108 }
109 #else
110 void flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
111 #endif
112
113 void hugetlb_free_pgd_range(struct mmu_gather *tlb, unsigned long addr,
114 unsigned long end, unsigned long floor,
115 unsigned long ceiling);
116
117 /*
118 * If the arch doesn't supply something else, assume that hugepage
119 * size aligned regions are ok without further preparation.
120 */
prepare_hugepage_range(struct file * file,unsigned long addr,unsigned long len)121 static inline int prepare_hugepage_range(struct file *file,
122 unsigned long addr, unsigned long len)
123 {
124 struct hstate *h = hstate_file(file);
125 if (len & ~huge_page_mask(h))
126 return -EINVAL;
127 if (addr & ~huge_page_mask(h))
128 return -EINVAL;
129 return 0;
130 }
131
set_huge_pte_at(struct mm_struct * mm,unsigned long addr,pte_t * ptep,pte_t pte)132 static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
133 pte_t *ptep, pte_t pte)
134 {
135 set_pte_at(mm, addr, ptep, pte);
136 }
137
huge_ptep_get_and_clear(struct mm_struct * mm,unsigned long addr,pte_t * ptep)138 static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
139 unsigned long addr, pte_t *ptep)
140 {
141 #ifdef CONFIG_PPC64
142 return __pte(pte_update(mm, addr, ptep, ~0UL, 0, 1));
143 #else
144 return __pte(pte_update(ptep, ~0UL, 0));
145 #endif
146 }
147
huge_ptep_clear_flush(struct vm_area_struct * vma,unsigned long addr,pte_t * ptep)148 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
149 unsigned long addr, pte_t *ptep)
150 {
151 pte_t pte;
152 pte = huge_ptep_get_and_clear(vma->vm_mm, addr, ptep);
153 flush_hugetlb_page(vma, addr);
154 }
155
huge_pte_none(pte_t pte)156 static inline int huge_pte_none(pte_t pte)
157 {
158 return pte_none(pte);
159 }
160
huge_pte_wrprotect(pte_t pte)161 static inline pte_t huge_pte_wrprotect(pte_t pte)
162 {
163 return pte_wrprotect(pte);
164 }
165
166 extern int huge_ptep_set_access_flags(struct vm_area_struct *vma,
167 unsigned long addr, pte_t *ptep,
168 pte_t pte, int dirty);
169
huge_ptep_get(pte_t * ptep)170 static inline pte_t huge_ptep_get(pte_t *ptep)
171 {
172 return *ptep;
173 }
174
arch_clear_hugepage_flags(struct page * page)175 static inline void arch_clear_hugepage_flags(struct page *page)
176 {
177 }
178
179 #else /* ! CONFIG_HUGETLB_PAGE */
flush_hugetlb_page(struct vm_area_struct * vma,unsigned long vmaddr)180 static inline void flush_hugetlb_page(struct vm_area_struct *vma,
181 unsigned long vmaddr)
182 {
183 }
184
185 #define hugepd_shift(x) 0
hugepte_offset(hugepd_t hpd,unsigned long addr,unsigned pdshift)186 static inline pte_t *hugepte_offset(hugepd_t hpd, unsigned long addr,
187 unsigned pdshift)
188 {
189 return NULL;
190 }
191 #endif /* CONFIG_HUGETLB_PAGE */
192
193 #endif /* _ASM_POWERPC_HUGETLB_H */
194
