diff options
Diffstat (limited to 'arch/powerpc/include/asm/book3s')
| -rw-r--r-- | arch/powerpc/include/asm/book3s/32/pgalloc.h | 44 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/book3s/32/pgtable.h | 43 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/book3s/64/hash-4k.h | 3 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/book3s/64/hash-64k.h | 3 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/book3s/64/hugetlb.h (renamed from arch/powerpc/include/asm/book3s/64/hugetlb-radix.h) | 28 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/book3s/64/pgtable.h | 18 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/book3s/64/radix.h | 28 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/book3s/64/tlbflush-radix.h | 2 |
8 files changed, 114 insertions, 55 deletions
diff --git a/arch/powerpc/include/asm/book3s/32/pgalloc.h b/arch/powerpc/include/asm/book3s/32/pgalloc.h index 8e21bb492dca..d310546e5d9d 100644 --- a/arch/powerpc/include/asm/book3s/32/pgalloc.h +++ b/arch/powerpc/include/asm/book3s/32/pgalloc.h @@ -2,14 +2,42 @@ #define _ASM_POWERPC_BOOK3S_32_PGALLOC_H #include <linux/threads.h> +#include <linux/slab.h> -/* For 32-bit, all levels of page tables are just drawn from get_free_page() */ -#define MAX_PGTABLE_INDEX_SIZE 0 +/* + * Functions that deal with pagetables that could be at any level of + * the table need to be passed an "index_size" so they know how to + * handle allocation. For PTE pages (which are linked to a struct + * page for now, and drawn from the main get_free_pages() pool), the + * allocation size will be (2^index_size * sizeof(pointer)) and + * allocations are drawn from the kmem_cache in PGT_CACHE(index_size). + * + * The maximum index size needs to be big enough to allow any + * pagetable sizes we need, but small enough to fit in the low bits of + * any page table pointer. In other words all pagetables, even tiny + * ones, must be aligned to allow at least enough low 0 bits to + * contain this value. This value is also used as a mask, so it must + * be one less than a power of two. + */ +#define MAX_PGTABLE_INDEX_SIZE 0xf extern void __bad_pte(pmd_t *pmd); -extern pgd_t *pgd_alloc(struct mm_struct *mm); -extern void pgd_free(struct mm_struct *mm, pgd_t *pgd); +extern struct kmem_cache *pgtable_cache[]; +#define PGT_CACHE(shift) ({ \ + BUG_ON(!(shift)); \ + pgtable_cache[(shift) - 1]; \ + }) + +static inline pgd_t *pgd_alloc(struct mm_struct *mm) +{ + return kmem_cache_alloc(PGT_CACHE(PGD_INDEX_SIZE), GFP_KERNEL); +} + +static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) +{ + kmem_cache_free(PGT_CACHE(PGD_INDEX_SIZE), pgd); +} /* * We don't have any real pmd's, and this code never triggers because @@ -68,8 +96,12 @@ static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage) static inline void pgtable_free(void *table, unsigned index_size) { - BUG_ON(index_size); /* 32-bit doesn't use this */ - free_page((unsigned long)table); + if (!index_size) { + free_page((unsigned long)table); + } else { + BUG_ON(index_size > MAX_PGTABLE_INDEX_SIZE); + kmem_cache_free(PGT_CACHE(index_size), table); + } } #define check_pgt_cache() do { } while (0) diff --git a/arch/powerpc/include/asm/book3s/32/pgtable.h b/arch/powerpc/include/asm/book3s/32/pgtable.h index 6b8b2d57fdc8..012223638815 100644 --- a/arch/powerpc/include/asm/book3s/32/pgtable.h +++ b/arch/powerpc/include/asm/book3s/32/pgtable.h @@ -8,6 +8,23 @@ /* And here we include common definitions */ #include <asm/pte-common.h> +#define PTE_INDEX_SIZE PTE_SHIFT +#define PMD_INDEX_SIZE 0 +#define PUD_INDEX_SIZE 0 +#define PGD_INDEX_SIZE (32 - PGDIR_SHIFT) + +#define PMD_CACHE_INDEX PMD_INDEX_SIZE + +#ifndef __ASSEMBLY__ +#define PTE_TABLE_SIZE (sizeof(pte_t) << PTE_INDEX_SIZE) +#define PMD_TABLE_SIZE 0 +#define PUD_TABLE_SIZE 0 +#define PGD_TABLE_SIZE (sizeof(pgd_t) << PGD_INDEX_SIZE) +#endif /* __ASSEMBLY__ */ + +#define PTRS_PER_PTE (1 << PTE_INDEX_SIZE) +#define PTRS_PER_PGD (1 << PGD_INDEX_SIZE) + /* * The normal case is that PTEs are 32-bits and we have a 1-page * 1024-entry pgdir pointing to 1-page 1024-entry PTE pages. -- paulus @@ -19,14 +36,10 @@ * -Matt */ /* PGDIR_SHIFT determines what a top-level page table entry can map */ -#define PGDIR_SHIFT (PAGE_SHIFT + PTE_SHIFT) +#define PGDIR_SHIFT (PAGE_SHIFT + PTE_INDEX_SIZE) #define PGDIR_SIZE (1UL << PGDIR_SHIFT) #define PGDIR_MASK (~(PGDIR_SIZE-1)) -#define PTRS_PER_PTE (1 << PTE_SHIFT) -#define PTRS_PER_PMD 1 -#define PTRS_PER_PGD (1 << (32 - PGDIR_SHIFT)) - #define USER_PTRS_PER_PGD (TASK_SIZE / PGDIR_SIZE) /* * This is the bottom of the PKMAP area with HIGHMEM or an arbitrary @@ -82,12 +95,8 @@ extern unsigned long ioremap_bot; -/* - * entries per page directory level: our page-table tree is two-level, so - * we don't really have any PMD directory. - */ -#define PTE_TABLE_SIZE (sizeof(pte_t) << PTE_SHIFT) -#define PGD_TABLE_SIZE (sizeof(pgd_t) << (32 - PGDIR_SHIFT)) +/* Bits to mask out from a PGD to get to the PUD page */ +#define PGD_MASKED_BITS 0 #define pte_ERROR(e) \ pr_err("%s:%d: bad pte %llx.\n", __FILE__, __LINE__, \ @@ -224,7 +233,8 @@ static inline void huge_ptep_set_wrprotect(struct mm_struct *mm, static inline void __ptep_set_access_flags(struct mm_struct *mm, - pte_t *ptep, pte_t entry) + pte_t *ptep, pte_t entry, + unsigned long address) { unsigned long set = pte_val(entry) & (_PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_RW | _PAGE_EXEC); @@ -283,15 +293,6 @@ static inline void __ptep_set_access_flags(struct mm_struct *mm, #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) >> 3 }) #define __swp_entry_to_pte(x) ((pte_t) { (x).val << 3 }) -#ifndef CONFIG_PPC_4K_PAGES -void pgtable_cache_init(void); -#else -/* - * No page table caches to initialise - */ -#define pgtable_cache_init() do { } while (0) -#endif - extern int get_pteptr(struct mm_struct *mm, unsigned long addr, pte_t **ptep, pmd_t **pmdp); diff --git a/arch/powerpc/include/asm/book3s/64/hash-4k.h b/arch/powerpc/include/asm/book3s/64/hash-4k.h index 1af837c561ba..1c64bc6330bc 100644 --- a/arch/powerpc/include/asm/book3s/64/hash-4k.h +++ b/arch/powerpc/include/asm/book3s/64/hash-4k.h @@ -16,9 +16,6 @@ #define H_PUD_TABLE_SIZE (sizeof(pud_t) << H_PUD_INDEX_SIZE) #define H_PGD_TABLE_SIZE (sizeof(pgd_t) << H_PGD_INDEX_SIZE) -/* With 4k base page size, hugepage PTEs go at the PMD level */ -#define MIN_HUGEPTE_SHIFT PMD_SHIFT - /* PTE flags to conserve for HPTE identification */ #define _PAGE_HPTEFLAGS (H_PAGE_BUSY | H_PAGE_HASHPTE | \ H_PAGE_F_SECOND | H_PAGE_F_GIX) diff --git a/arch/powerpc/include/asm/book3s/64/hash-64k.h b/arch/powerpc/include/asm/book3s/64/hash-64k.h index 5aae4f530c21..f3dd21efa2ea 100644 --- a/arch/powerpc/include/asm/book3s/64/hash-64k.h +++ b/arch/powerpc/include/asm/book3s/64/hash-64k.h @@ -6,9 +6,6 @@ #define H_PUD_INDEX_SIZE 5 #define H_PGD_INDEX_SIZE 12 -/* With 4k base page size, hugepage PTEs go at the PMD level */ -#define MIN_HUGEPTE_SHIFT PAGE_SHIFT - #define H_PAGE_COMBO 0x00001000 /* this is a combo 4k page */ #define H_PAGE_4K_PFN 0x00002000 /* PFN is for a single 4k page */ /* diff --git a/arch/powerpc/include/asm/book3s/64/hugetlb-radix.h b/arch/powerpc/include/asm/book3s/64/hugetlb.h index c45189aa7476..c62f14d0bec1 100644 --- a/arch/powerpc/include/asm/book3s/64/hugetlb-radix.h +++ b/arch/powerpc/include/asm/book3s/64/hugetlb.h @@ -1,5 +1,5 @@ -#ifndef _ASM_POWERPC_BOOK3S_64_HUGETLB_RADIX_H -#define _ASM_POWERPC_BOOK3S_64_HUGETLB_RADIX_H +#ifndef _ASM_POWERPC_BOOK3S_64_HUGETLB_H +#define _ASM_POWERPC_BOOK3S_64_HUGETLB_H /* * For radix we want generic code to handle hugetlb. But then if we want * both hash and radix to be enabled together we need to workaround the @@ -21,9 +21,33 @@ static inline int hstate_get_psize(struct hstate *hstate) return MMU_PAGE_2M; else if (shift == mmu_psize_defs[MMU_PAGE_1G].shift) return MMU_PAGE_1G; + else if (shift == mmu_psize_defs[MMU_PAGE_16M].shift) + return MMU_PAGE_16M; + else if (shift == mmu_psize_defs[MMU_PAGE_16G].shift) + return MMU_PAGE_16G; else { WARN(1, "Wrong huge page shift\n"); return mmu_virtual_psize; } } + +#define arch_make_huge_pte arch_make_huge_pte +static inline pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma, + struct page *page, int writable) +{ + unsigned long page_shift; + + if (!cpu_has_feature(CPU_FTR_POWER9_DD1)) + return entry; + + page_shift = huge_page_shift(hstate_vma(vma)); + /* + * We don't support 1G hugetlb pages yet. + */ + VM_WARN_ON(page_shift == mmu_psize_defs[MMU_PAGE_1G].shift); + if (page_shift == mmu_psize_defs[MMU_PAGE_2M].shift) + return __pte(pte_val(entry) | _PAGE_LARGE); + else + return entry; +} #endif diff --git a/arch/powerpc/include/asm/book3s/64/pgtable.h b/arch/powerpc/include/asm/book3s/64/pgtable.h index 0ebfbc8f0449..5905f0ff57d1 100644 --- a/arch/powerpc/include/asm/book3s/64/pgtable.h +++ b/arch/powerpc/include/asm/book3s/64/pgtable.h @@ -26,6 +26,11 @@ #define _RPAGE_SW1 0x00800 #define _RPAGE_SW2 0x00400 #define _RPAGE_SW3 0x00200 +#define _RPAGE_RSV1 0x1000000000000000UL +#define _RPAGE_RSV2 0x0800000000000000UL +#define _RPAGE_RSV3 0x0400000000000000UL +#define _RPAGE_RSV4 0x0200000000000000UL + #ifdef CONFIG_MEM_SOFT_DIRTY #define _PAGE_SOFT_DIRTY _RPAGE_SW3 /* software: software dirty tracking */ #else @@ -33,6 +38,11 @@ #endif #define _PAGE_SPECIAL _RPAGE_SW2 /* software: special page */ +/* + * For P9 DD1 only, we need to track whether the pte's huge. + */ +#define _PAGE_LARGE _RPAGE_RSV1 + #define _PAGE_PTE (1ul << 62) /* distinguishes PTEs from pointers */ #define _PAGE_PRESENT (1ul << 63) /* pte contains a translation */ @@ -568,10 +578,11 @@ static inline bool check_pte_access(unsigned long access, unsigned long ptev) */ static inline void __ptep_set_access_flags(struct mm_struct *mm, - pte_t *ptep, pte_t entry) + pte_t *ptep, pte_t entry, + unsigned long address) { if (radix_enabled()) - return radix__ptep_set_access_flags(mm, ptep, entry); + return radix__ptep_set_access_flags(mm, ptep, entry, address); return hash__ptep_set_access_flags(ptep, entry); } @@ -789,9 +800,6 @@ extern struct page *pgd_page(pgd_t pgd); #define pgd_ERROR(e) \ pr_err("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e)) -void pgtable_cache_add(unsigned shift, void (*ctor)(void *)); -void pgtable_cache_init(void); - static inline int map_kernel_page(unsigned long ea, unsigned long pa, unsigned long flags) { diff --git a/arch/powerpc/include/asm/book3s/64/radix.h b/arch/powerpc/include/asm/book3s/64/radix.h index 2a46dea8e1b1..b4d1302387a3 100644 --- a/arch/powerpc/include/asm/book3s/64/radix.h +++ b/arch/powerpc/include/asm/book3s/64/radix.h @@ -140,19 +140,20 @@ static inline unsigned long radix__pte_update(struct mm_struct *mm, unsigned long new_pte; old_pte = __radix_pte_update(ptep, ~0, 0); - asm volatile("ptesync" : : : "memory"); /* * new value of pte */ new_pte = (old_pte | set) & ~clr; - /* - * For now let's do heavy pid flush - * radix__flush_tlb_page_psize(mm, addr, mmu_virtual_psize); + * If we are trying to clear the pte, we can skip + * the below sequence and batch the tlb flush. The + * tlb flush batching is done by mmu gather code */ - radix__flush_tlb_mm(mm); - - __radix_pte_update(ptep, 0, new_pte); + if (new_pte) { + asm volatile("ptesync" : : : "memory"); + radix__flush_tlb_pte_p9_dd1(old_pte, mm, addr); + __radix_pte_update(ptep, 0, new_pte); + } } else old_pte = __radix_pte_update(ptep, clr, set); asm volatile("ptesync" : : : "memory"); @@ -167,7 +168,8 @@ static inline unsigned long radix__pte_update(struct mm_struct *mm, * function doesn't need to invalidate tlb. */ static inline void radix__ptep_set_access_flags(struct mm_struct *mm, - pte_t *ptep, pte_t entry) + pte_t *ptep, pte_t entry, + unsigned long address) { unsigned long set = pte_val(entry) & (_PAGE_DIRTY | _PAGE_ACCESSED | @@ -183,13 +185,7 @@ static inline void radix__ptep_set_access_flags(struct mm_struct *mm, * new value of pte */ new_pte = old_pte | set; - - /* - * For now let's do heavy pid flush - * radix__flush_tlb_page_psize(mm, addr, mmu_virtual_psize); - */ - radix__flush_tlb_mm(mm); - + radix__flush_tlb_pte_p9_dd1(old_pte, mm, address); __radix_pte_update(ptep, 0, new_pte); } else __radix_pte_update(ptep, 0, set); @@ -243,6 +239,8 @@ static inline int radix__pmd_trans_huge(pmd_t pmd) static inline pmd_t radix__pmd_mkhuge(pmd_t pmd) { + if (cpu_has_feature(CPU_FTR_POWER9_DD1)) + return __pmd(pmd_val(pmd) | _PAGE_PTE | _PAGE_LARGE); return __pmd(pmd_val(pmd) | _PAGE_PTE); } static inline void radix__pmdp_huge_split_prepare(struct vm_area_struct *vma, diff --git a/arch/powerpc/include/asm/book3s/64/tlbflush-radix.h b/arch/powerpc/include/asm/book3s/64/tlbflush-radix.h index a9e19cb2f7c5..cc7fbde4f53c 100644 --- a/arch/powerpc/include/asm/book3s/64/tlbflush-radix.h +++ b/arch/powerpc/include/asm/book3s/64/tlbflush-radix.h @@ -42,4 +42,6 @@ extern void radix__flush_tlb_lpid_va(unsigned long lpid, unsigned long gpa, unsigned long page_size); extern void radix__flush_tlb_lpid(unsigned long lpid); extern void radix__flush_tlb_all(void); +extern void radix__flush_tlb_pte_p9_dd1(unsigned long old_pte, struct mm_struct *mm, + unsigned long address); #endif |