From a2f41eb99208adf4732529c4df1fd12b39f4c333 Mon Sep 17 00:00:00 2001 From: "Aneesh Kumar K.V" Date: Fri, 29 Apr 2016 23:26:19 +1000 Subject: [PATCH] powerpc/mm: Add radix pgalloc details Signed-off-by: Aneesh Kumar K.V Signed-off-by: Michael Ellerman --- arch/powerpc/include/asm/book3s/64/pgalloc.h | 34 +++++++++++++++++--- arch/powerpc/include/asm/book3s/64/pgtable.h | 10 ++++-- arch/powerpc/mm/hash_utils_64.c | 7 ++++ arch/powerpc/mm/pgtable-radix.c | 5 ++- arch/powerpc/mm/pgtable_64.c | 6 ++++ 5 files changed, 55 insertions(+), 7 deletions(-) diff --git a/arch/powerpc/include/asm/book3s/64/pgalloc.h b/arch/powerpc/include/asm/book3s/64/pgalloc.h index faad1319ba26..488279edb1f0 100644 --- a/arch/powerpc/include/asm/book3s/64/pgalloc.h +++ b/arch/powerpc/include/asm/book3s/64/pgalloc.h @@ -50,19 +50,45 @@ extern void pgtable_free_tlb(struct mmu_gather *tlb, void *table, int shift); extern void __tlb_remove_table(void *_table); #endif +static inline pgd_t *radix__pgd_alloc(struct mm_struct *mm) +{ +#ifdef CONFIG_PPC_64K_PAGES + return (pgd_t *)__get_free_page(PGALLOC_GFP); +#else + struct page *page; + page = alloc_pages(PGALLOC_GFP, 4); + if (!page) + return NULL; + return (pgd_t *) page_address(page); +#endif +} + +static inline void radix__pgd_free(struct mm_struct *mm, pgd_t *pgd) +{ +#ifdef CONFIG_PPC_64K_PAGES + free_page((unsigned long)pgd); +#else + free_pages((unsigned long)pgd, 4); +#endif +} + static inline pgd_t *pgd_alloc(struct mm_struct *mm) { + if (radix_enabled()) + return radix__pgd_alloc(mm); return kmem_cache_alloc(PGT_CACHE(PGD_INDEX_SIZE), GFP_KERNEL); } static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) { + if (radix_enabled()) + return radix__pgd_free(mm, pgd); kmem_cache_free(PGT_CACHE(PGD_INDEX_SIZE), pgd); } static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud) { - pgd_set(pgd, __pgtable_ptr_val(pud)); + pgd_set(pgd, __pgtable_ptr_val(pud) | PGD_VAL_BITS); } static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr) @@ -78,7 +104,7 @@ static inline void pud_free(struct mm_struct *mm, pud_t *pud) static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd) { - pud_set(pud, __pgtable_ptr_val(pmd)); + pud_set(pud, __pgtable_ptr_val(pmd) | PUD_VAL_BITS); } static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pud, @@ -107,13 +133,13 @@ static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd, static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte) { - pmd_set(pmd, __pgtable_ptr_val(pte)); + pmd_set(pmd, __pgtable_ptr_val(pte) | PMD_VAL_BITS); } static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t pte_page) { - pmd_set(pmd, __pgtable_ptr_val(pte_page)); + pmd_set(pmd, __pgtable_ptr_val(pte_page) | PMD_VAL_BITS); } static inline pgtable_t pmd_pgtable(pmd_t pmd) diff --git a/arch/powerpc/include/asm/book3s/64/pgtable.h b/arch/powerpc/include/asm/book3s/64/pgtable.h index 9bc2471a8207..32a975694e53 100644 --- a/arch/powerpc/include/asm/book3s/64/pgtable.h +++ b/arch/powerpc/include/asm/book3s/64/pgtable.h @@ -170,11 +170,17 @@ extern unsigned long __pgd_table_size; #define PMD_TABLE_SIZE __pmd_table_size #define PUD_TABLE_SIZE __pud_table_size #define PGD_TABLE_SIZE __pgd_table_size + +extern unsigned long __pmd_val_bits; +extern unsigned long __pud_val_bits; +extern unsigned long __pgd_val_bits; +#define PMD_VAL_BITS __pmd_val_bits +#define PUD_VAL_BITS __pud_val_bits +#define PGD_VAL_BITS __pgd_val_bits /* * Pgtable size used by swapper, init in asm code - * We will switch this later to radix PGD */ -#define MAX_PGD_TABLE_SIZE (sizeof(pgd_t) << H_PGD_INDEX_SIZE) +#define MAX_PGD_TABLE_SIZE (sizeof(pgd_t) << RADIX_PGD_INDEX_SIZE) #define PTRS_PER_PTE (1 << PTE_INDEX_SIZE) #define PTRS_PER_PMD (1 << PMD_INDEX_SIZE) diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c index faaadeff7c1e..64165a730160 100644 --- a/arch/powerpc/mm/hash_utils_64.c +++ b/arch/powerpc/mm/hash_utils_64.c @@ -882,6 +882,13 @@ void __init hash__early_init_mmu(void) __pmd_table_size = H_PMD_TABLE_SIZE; __pud_table_size = H_PUD_TABLE_SIZE; __pgd_table_size = H_PGD_TABLE_SIZE; + /* + * 4k use hugepd format, so for hash set then to + * zero + */ + __pmd_val_bits = 0; + __pud_val_bits = 0; + __pgd_val_bits = 0; /* Initialize the MMU Hash table and create the linear mapping * of memory. Has to be done before SLB initialization as this is * currently where the page size encoding is obtained. diff --git a/arch/powerpc/mm/pgtable-radix.c b/arch/powerpc/mm/pgtable-radix.c index 04ec9760380d..6182b6c3c9c3 100644 --- a/arch/powerpc/mm/pgtable-radix.c +++ b/arch/powerpc/mm/pgtable-radix.c @@ -324,8 +324,11 @@ void __init radix__early_init_mmu(void) __pud_table_size = RADIX_PUD_TABLE_SIZE; __pgd_table_size = RADIX_PGD_TABLE_SIZE; - radix_init_page_sizes(); + __pmd_val_bits = RADIX_PMD_VAL_BITS; + __pud_val_bits = RADIX_PUD_VAL_BITS; + __pgd_val_bits = RADIX_PGD_VAL_BITS; + radix_init_page_sizes(); if (!firmware_has_feature(FW_FEATURE_LPAR)) radix_init_partition_table(); diff --git a/arch/powerpc/mm/pgtable_64.c b/arch/powerpc/mm/pgtable_64.c index 326c3d43edcd..b8c75e65157c 100644 --- a/arch/powerpc/mm/pgtable_64.c +++ b/arch/powerpc/mm/pgtable_64.c @@ -91,6 +91,12 @@ unsigned long __pud_table_size; EXPORT_SYMBOL(__pud_table_size); unsigned long __pgd_table_size; EXPORT_SYMBOL(__pgd_table_size); +unsigned long __pmd_val_bits; +EXPORT_SYMBOL(__pmd_val_bits); +unsigned long __pud_val_bits; +EXPORT_SYMBOL(__pud_val_bits); +unsigned long __pgd_val_bits; +EXPORT_SYMBOL(__pgd_val_bits); #endif unsigned long ioremap_bot = IOREMAP_BASE; -- 2.20.1