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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
bee8b3b5 AK |
2 | #ifndef _ASM_POWERPC_BOOK3S_64_HUGETLB_H |
3 | #define _ASM_POWERPC_BOOK3S_64_HUGETLB_H | |
48483760 AK |
4 | /* |
5 | * For radix we want generic code to handle hugetlb. But then if we want | |
6 | * both hash and radix to be enabled together we need to workaround the | |
7 | * limitations. | |
8 | */ | |
9 | void radix__flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr); | |
10 | void radix__local_flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr); | |
11 | extern unsigned long | |
12 | radix__hugetlb_get_unmapped_area(struct file *file, unsigned long addr, | |
13 | unsigned long len, unsigned long pgoff, | |
14 | unsigned long flags); | |
fbfa26d8 | 15 | |
8ef5cbde AK |
16 | extern void radix__huge_ptep_modify_prot_commit(struct vm_area_struct *vma, |
17 | unsigned long addr, pte_t *ptep, | |
18 | pte_t old_pte, pte_t pte); | |
19 | ||
fbfa26d8 AK |
20 | static inline int hstate_get_psize(struct hstate *hstate) |
21 | { | |
22 | unsigned long shift; | |
23 | ||
24 | shift = huge_page_shift(hstate); | |
25 | if (shift == mmu_psize_defs[MMU_PAGE_2M].shift) | |
26 | return MMU_PAGE_2M; | |
27 | else if (shift == mmu_psize_defs[MMU_PAGE_1G].shift) | |
28 | return MMU_PAGE_1G; | |
ccf17c8b AK |
29 | else if (shift == mmu_psize_defs[MMU_PAGE_16M].shift) |
30 | return MMU_PAGE_16M; | |
31 | else if (shift == mmu_psize_defs[MMU_PAGE_16G].shift) | |
32 | return MMU_PAGE_16G; | |
fbfa26d8 AK |
33 | else { |
34 | WARN(1, "Wrong huge page shift\n"); | |
35 | return mmu_virtual_psize; | |
36 | } | |
37 | } | |
049d567a | 38 | |
40692eb5 AK |
39 | #ifdef CONFIG_ARCH_HAS_GIGANTIC_PAGE |
40 | static inline bool gigantic_page_supported(void) | |
41 | { | |
35f2806b AK |
42 | /* |
43 | * We used gigantic page reservation with hypervisor assist in some case. | |
44 | * We cannot use runtime allocation of gigantic pages in those platforms | |
45 | * This is hash translation mode LPARs. | |
46 | */ | |
47 | if (firmware_has_feature(FW_FEATURE_LPAR) && !radix_enabled()) | |
48 | return false; | |
49 | ||
4ae279c2 | 50 | return true; |
40692eb5 AK |
51 | } |
52 | #endif | |
53 | ||
f1981b5b AK |
54 | /* hugepd entry valid bit */ |
55 | #define HUGEPD_VAL_BITS (0x8000000000000000UL) | |
56 | ||
8ef5cbde AK |
57 | #define huge_ptep_modify_prot_start huge_ptep_modify_prot_start |
58 | extern pte_t huge_ptep_modify_prot_start(struct vm_area_struct *vma, | |
59 | unsigned long addr, pte_t *ptep); | |
60 | ||
61 | #define huge_ptep_modify_prot_commit huge_ptep_modify_prot_commit | |
62 | extern void huge_ptep_modify_prot_commit(struct vm_area_struct *vma, | |
63 | unsigned long addr, pte_t *ptep, | |
64 | pte_t old_pte, pte_t new_pte); | |
48483760 | 65 | #endif |