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Diffstat (limited to '')
-rw-r--r-- | arch/powerpc/include/asm/nohash/pgalloc.h | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/nohash/pgalloc.h b/arch/powerpc/include/asm/nohash/pgalloc.h new file mode 100644 index 000000000..4b6237631 --- /dev/null +++ b/arch/powerpc/include/asm/nohash/pgalloc.h @@ -0,0 +1,72 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_POWERPC_NOHASH_PGALLOC_H +#define _ASM_POWERPC_NOHASH_PGALLOC_H + +#include <linux/mm.h> +#include <linux/slab.h> + +extern void tlb_remove_table(struct mmu_gather *tlb, void *table); +#ifdef CONFIG_PPC64 +extern void tlb_flush_pgtable(struct mmu_gather *tlb, unsigned long address); +#else +/* 44x etc which is BOOKE not BOOK3E */ +static inline void tlb_flush_pgtable(struct mmu_gather *tlb, + unsigned long address) +{ + +} +#endif /* !CONFIG_PPC_BOOK3E_64 */ + +static inline pgd_t *pgd_alloc(struct mm_struct *mm) +{ + return kmem_cache_alloc(PGT_CACHE(PGD_INDEX_SIZE), + pgtable_gfp_flags(mm, GFP_KERNEL)); +} + +static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) +{ + kmem_cache_free(PGT_CACHE(PGD_INDEX_SIZE), pgd); +} + +#ifdef CONFIG_PPC64 +#include <asm/nohash/64/pgalloc.h> +#else +#include <asm/nohash/32/pgalloc.h> +#endif + +static inline void pgtable_free(void *table, int shift) +{ + if (!shift) { + pte_fragment_free((unsigned long *)table, 0); + } else { + BUG_ON(shift > MAX_PGTABLE_INDEX_SIZE); + kmem_cache_free(PGT_CACHE(shift), table); + } +} + +#define get_hugepd_cache_index(x) (x) + +static inline void pgtable_free_tlb(struct mmu_gather *tlb, void *table, int shift) +{ + unsigned long pgf = (unsigned long)table; + + BUG_ON(shift > MAX_PGTABLE_INDEX_SIZE); + pgf |= shift; + tlb_remove_table(tlb, (void *)pgf); +} + +static inline void __tlb_remove_table(void *_table) +{ + void *table = (void *)((unsigned long)_table & ~MAX_PGTABLE_INDEX_SIZE); + unsigned shift = (unsigned long)_table & MAX_PGTABLE_INDEX_SIZE; + + pgtable_free(table, shift); +} + +static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t table, + unsigned long address) +{ + tlb_flush_pgtable(tlb, address); + pgtable_free_tlb(tlb, table, 0); +} +#endif /* _ASM_POWERPC_NOHASH_PGALLOC_H */ |