| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | #ifndef _ASM_POWERPC_NOHASH_PGALLOC_H |
| 3 | #define _ASM_POWERPC_NOHASH_PGALLOC_H |
| 4 | |
| 5 | #include <linux/mm.h> |
| 6 | #include <linux/slab.h> |
| 7 | |
| 8 | extern void tlb_remove_table(struct mmu_gather *tlb, void *table); |
| 9 | #ifdef CONFIG_PPC64 |
| 10 | extern void tlb_flush_pgtable(struct mmu_gather *tlb, unsigned long address); |
| 11 | #else |
| 12 | /* 44x etc which is BOOKE not BOOK3E */ |
| 13 | static inline void tlb_flush_pgtable(struct mmu_gather *tlb, |
| 14 | unsigned long address) |
| 15 | { |
| 16 | |
| 17 | } |
| 18 | #endif /* !CONFIG_PPC_BOOK3E */ |
| 19 | |
| 20 | static inline pgd_t *pgd_alloc(struct mm_struct *mm) |
| 21 | { |
| 22 | return kmem_cache_alloc(PGT_CACHE(PGD_INDEX_SIZE), |
| 23 | pgtable_gfp_flags(mm, GFP_KERNEL)); |
| 24 | } |
| 25 | |
| 26 | static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) |
| 27 | { |
| 28 | kmem_cache_free(PGT_CACHE(PGD_INDEX_SIZE), pgd); |
| 29 | } |
| 30 | |
| 31 | #ifdef CONFIG_PPC64 |
| 32 | #include <asm/nohash/64/pgalloc.h> |
| 33 | #else |
| 34 | #include <asm/nohash/32/pgalloc.h> |
| 35 | #endif |
| 36 | |
| 37 | static inline void pgtable_free(void *table, int shift) |
| 38 | { |
| 39 | if (!shift) { |
| 40 | pte_fragment_free((unsigned long *)table, 0); |
| 41 | } else { |
| 42 | BUG_ON(shift > MAX_PGTABLE_INDEX_SIZE); |
| 43 | kmem_cache_free(PGT_CACHE(shift), table); |
| 44 | } |
| 45 | } |
| 46 | |
| 47 | #define get_hugepd_cache_index(x) (x) |
| 48 | |
| 49 | static inline void pgtable_free_tlb(struct mmu_gather *tlb, void *table, int shift) |
| 50 | { |
| 51 | unsigned long pgf = (unsigned long)table; |
| 52 | |
| 53 | BUG_ON(shift > MAX_PGTABLE_INDEX_SIZE); |
| 54 | pgf |= shift; |
| 55 | tlb_remove_table(tlb, (void *)pgf); |
| 56 | } |
| 57 | |
| 58 | static inline void __tlb_remove_table(void *_table) |
| 59 | { |
| 60 | void *table = (void *)((unsigned long)_table & ~MAX_PGTABLE_INDEX_SIZE); |
| 61 | unsigned shift = (unsigned long)_table & MAX_PGTABLE_INDEX_SIZE; |
| 62 | |
| 63 | pgtable_free(table, shift); |
| 64 | } |
| 65 | |
| 66 | static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t table, |
| 67 | unsigned long address) |
| 68 | { |
| 69 | tlb_flush_pgtable(tlb, address); |
| 70 | pgtable_free_tlb(tlb, table, 0); |
| 71 | } |
| 72 | #endif /* _ASM_POWERPC_NOHASH_PGALLOC_H */ |