xref: /openbmc/linux/arch/powerpc/include/asm/hugetlb.h (revision dfccddd5874fcb2f0715c8e02ce633139425d295)
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 
8 #ifdef CONFIG_PPC_BOOK3S_64
9 #include <asm/book3s/64/hugetlb.h>
10 #elif defined(CONFIG_PPC_E500)
11 #include <asm/nohash/hugetlb-e500.h>
12 #elif defined(CONFIG_PPC_8xx)
13 #include <asm/nohash/32/hugetlb-8xx.h>
14 #endif /* CONFIG_PPC_BOOK3S_64 */
15 
16 extern bool hugetlb_disabled;
17 
18 static inline bool hugepages_supported(void)
19 {
20 	if (hugetlb_disabled)
21 		return false;
22 
23 	return HPAGE_SHIFT != 0;
24 }
25 #define hugepages_supported hugepages_supported
26 
27 void __init hugetlbpage_init_defaultsize(void);
28 
29 int slice_is_hugepage_only_range(struct mm_struct *mm, unsigned long addr,
30 			   unsigned long len);
31 
32 static inline int is_hugepage_only_range(struct mm_struct *mm,
33 					 unsigned long addr,
34 					 unsigned long len)
35 {
36 	if (IS_ENABLED(CONFIG_PPC_64S_HASH_MMU) && !radix_enabled())
37 		return slice_is_hugepage_only_range(mm, addr, len);
38 	return 0;
39 }
40 #define is_hugepage_only_range is_hugepage_only_range
41 
42 #define __HAVE_ARCH_HUGETLB_FREE_PGD_RANGE
43 void hugetlb_free_pgd_range(struct mmu_gather *tlb, unsigned long addr,
44 			    unsigned long end, unsigned long floor,
45 			    unsigned long ceiling);
46 
47 #define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR
48 static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
49 					    unsigned long addr, pte_t *ptep)
50 {
51 	return __pte(pte_update(mm, addr, ptep, ~0UL, 0, 1));
52 }
53 
54 #define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH
55 static inline pte_t huge_ptep_clear_flush(struct vm_area_struct *vma,
56 					  unsigned long addr, pte_t *ptep)
57 {
58 	pte_t pte;
59 
60 	pte = huge_ptep_get_and_clear(vma->vm_mm, addr, ptep);
61 	flush_hugetlb_page(vma, addr);
62 	return pte;
63 }
64 
65 #define __HAVE_ARCH_HUGE_PTEP_SET_ACCESS_FLAGS
66 int huge_ptep_set_access_flags(struct vm_area_struct *vma,
67 			       unsigned long addr, pte_t *ptep,
68 			       pte_t pte, int dirty);
69 
70 void gigantic_hugetlb_cma_reserve(void) __init;
71 #include <asm-generic/hugetlb.h>
72 
73 #else /* ! CONFIG_HUGETLB_PAGE */
74 static inline void flush_hugetlb_page(struct vm_area_struct *vma,
75 				      unsigned long vmaddr)
76 {
77 }
78 
79 #define hugepd_shift(x) 0
80 static inline pte_t *hugepte_offset(hugepd_t hpd, unsigned long addr,
81 				    unsigned pdshift)
82 {
83 	return NULL;
84 }
85 
86 
87 static inline void __init gigantic_hugetlb_cma_reserve(void)
88 {
89 }
90 
91 static inline void __init hugetlbpage_init_defaultsize(void)
92 {
93 }
94 #endif /* CONFIG_HUGETLB_PAGE */
95 
96 #endif /* _ASM_POWERPC_HUGETLB_H */
97