diff options
| -rw-r--r-- | arch/sparc/include/asm/hugetlb.h | 12 | ||||
| -rw-r--r-- | arch/sparc/include/asm/pgtable_64.h | 7 | ||||
| -rw-r--r-- | arch/sparc/include/asm/tsb.h | 2 | ||||
| -rw-r--r-- | arch/sparc/mm/fault_64.c | 4 | ||||
| -rw-r--r-- | arch/sparc/mm/hugetlbpage.c | 166 | ||||
| -rw-r--r-- | arch/sparc/mm/init_64.c | 6 |
6 files changed, 129 insertions, 68 deletions
diff --git a/arch/sparc/include/asm/hugetlb.h b/arch/sparc/include/asm/hugetlb.h index 139e711ff80c..dcbf985ab243 100644 --- a/arch/sparc/include/asm/hugetlb.h +++ b/arch/sparc/include/asm/hugetlb.h @@ -31,14 +31,6 @@ static inline int prepare_hugepage_range(struct file *file, return 0; } -static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb, - unsigned long addr, unsigned long end, - unsigned long floor, - unsigned long ceiling) -{ - free_pgd_range(tlb, addr, end, floor, ceiling); -} - static inline void huge_ptep_clear_flush(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep) { @@ -82,4 +74,8 @@ static inline void arch_clear_hugepage_flags(struct page *page) { } +void hugetlb_free_pgd_range(struct mmu_gather *tlb, unsigned long addr, + unsigned long end, unsigned long floor, + unsigned long ceiling); + #endif /* _ASM_SPARC64_HUGETLB_H */ diff --git a/arch/sparc/include/asm/pgtable_64.h b/arch/sparc/include/asm/pgtable_64.h index e7d82803a48f..1fb317fbc0b3 100644 --- a/arch/sparc/include/asm/pgtable_64.h +++ b/arch/sparc/include/asm/pgtable_64.h @@ -395,7 +395,7 @@ static inline unsigned long __pte_huge_mask(void) static inline pte_t pte_mkhuge(pte_t pte) { - return __pte(pte_val(pte) | __pte_huge_mask()); + return __pte(pte_val(pte) | _PAGE_PMD_HUGE | __pte_huge_mask()); } static inline bool is_hugetlb_pte(pte_t pte) @@ -403,6 +403,11 @@ static inline bool is_hugetlb_pte(pte_t pte) return !!(pte_val(pte) & __pte_huge_mask()); } +static inline bool is_hugetlb_pmd(pmd_t pmd) +{ + return !!(pmd_val(pmd) & _PAGE_PMD_HUGE); +} + #ifdef CONFIG_TRANSPARENT_HUGEPAGE static inline pmd_t pmd_mkhuge(pmd_t pmd) { diff --git a/arch/sparc/include/asm/tsb.h b/arch/sparc/include/asm/tsb.h index c6a155c3904e..32258e08da03 100644 --- a/arch/sparc/include/asm/tsb.h +++ b/arch/sparc/include/asm/tsb.h @@ -203,7 +203,7 @@ extern struct tsb_phys_patch_entry __tsb_phys_patch, __tsb_phys_patch_end; * We have to propagate the 4MB bit of the virtual address * because we are fabricating 8MB pages using 4MB hw pages. */ -#ifdef CONFIG_TRANSPARENT_HUGEPAGE +#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE) #define USER_PGTABLE_CHECK_PMD_HUGE(VADDR, REG1, REG2, FAIL_LABEL, PTE_LABEL) \ brz,pn REG1, FAIL_LABEL; \ sethi %uhi(_PAGE_PMD_HUGE), REG2; \ diff --git a/arch/sparc/mm/fault_64.c b/arch/sparc/mm/fault_64.c index 3a16ba0dc356..e16fdd28a931 100644 --- a/arch/sparc/mm/fault_64.c +++ b/arch/sparc/mm/fault_64.c @@ -111,8 +111,8 @@ static unsigned int get_user_insn(unsigned long tpc) if (pmd_none(*pmdp) || unlikely(pmd_bad(*pmdp))) goto out_irq_enable; -#ifdef CONFIG_TRANSPARENT_HUGEPAGE - if (pmd_trans_huge(*pmdp)) { +#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE) + if (is_hugetlb_pmd(*pmdp)) { pa = pmd_pfn(*pmdp) << PAGE_SHIFT; pa += tpc & ~HPAGE_MASK; diff --git a/arch/sparc/mm/hugetlbpage.c b/arch/sparc/mm/hugetlbpage.c index d69b66e01b84..988acc8b1b80 100644 --- a/arch/sparc/mm/hugetlbpage.c +++ b/arch/sparc/mm/hugetlbpage.c @@ -12,6 +12,7 @@ #include <asm/mman.h> #include <asm/pgalloc.h> +#include <asm/pgtable.h> #include <asm/tlb.h> #include <asm/tlbflush.h> #include <asm/cacheflush.h> @@ -131,23 +132,13 @@ pte_t *huge_pte_alloc(struct mm_struct *mm, { pgd_t *pgd; pud_t *pud; - pmd_t *pmd; pte_t *pte = NULL; - /* We must align the address, because our caller will run - * set_huge_pte_at() on whatever we return, which writes out - * all of the sub-ptes for the hugepage range. So we have - * to give it the first such sub-pte. - */ - addr &= HPAGE_MASK; - pgd = pgd_offset(mm, addr); pud = pud_alloc(mm, pgd, addr); - if (pud) { - pmd = pmd_alloc(mm, pud, addr); - if (pmd) - pte = pte_alloc_map(mm, pmd, addr); - } + if (pud) + pte = (pte_t *)pmd_alloc(mm, pud, addr); + return pte; } @@ -155,19 +146,13 @@ pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr) { pgd_t *pgd; pud_t *pud; - pmd_t *pmd; pte_t *pte = NULL; - addr &= HPAGE_MASK; - pgd = pgd_offset(mm, addr); if (!pgd_none(*pgd)) { pud = pud_offset(pgd, addr); - if (!pud_none(*pud)) { - pmd = pmd_offset(pud, addr); - if (!pmd_none(*pmd)) - pte = pte_offset_map(pmd, addr); - } + if (!pud_none(*pud)) + pte = (pte_t *)pmd_offset(pud, addr); } return pte; } @@ -175,70 +160,143 @@ pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr) void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t entry) { - int i; - pte_t orig[2]; - unsigned long nptes; + pte_t orig; if (!pte_present(*ptep) && pte_present(entry)) mm->context.hugetlb_pte_count++; addr &= HPAGE_MASK; - - nptes = 1 << HUGETLB_PAGE_ORDER; - orig[0] = *ptep; - orig[1] = *(ptep + nptes / 2); - for (i = 0; i < nptes; i++) { - *ptep = entry; - ptep++; - addr += PAGE_SIZE; - pte_val(entry) += PAGE_SIZE; - } + orig = *ptep; + *ptep = entry; /* Issue TLB flush at REAL_HPAGE_SIZE boundaries */ - addr -= REAL_HPAGE_SIZE; - ptep -= nptes / 2; - maybe_tlb_batch_add(mm, addr, ptep, orig[1], 0); - addr -= REAL_HPAGE_SIZE; - ptep -= nptes / 2; - maybe_tlb_batch_add(mm, addr, ptep, orig[0], 0); + maybe_tlb_batch_add(mm, addr, ptep, orig, 0); + maybe_tlb_batch_add(mm, addr + REAL_HPAGE_SIZE, ptep, orig, 0); } pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep) { pte_t entry; - int i; - unsigned long nptes; entry = *ptep; if (pte_present(entry)) mm->context.hugetlb_pte_count--; addr &= HPAGE_MASK; - nptes = 1 << HUGETLB_PAGE_ORDER; - for (i = 0; i < nptes; i++) { - *ptep = __pte(0UL); - addr += PAGE_SIZE; - ptep++; - } + *ptep = __pte(0UL); /* Issue TLB flush at REAL_HPAGE_SIZE boundaries */ - addr -= REAL_HPAGE_SIZE; - ptep -= nptes / 2; - maybe_tlb_batch_add(mm, addr, ptep, entry, 0); - addr -= REAL_HPAGE_SIZE; - ptep -= nptes / 2; maybe_tlb_batch_add(mm, addr, ptep, entry, 0); + maybe_tlb_batch_add(mm, addr + REAL_HPAGE_SIZE, ptep, entry, 0); return entry; } int pmd_huge(pmd_t pmd) { - return 0; + return !pmd_none(pmd) && + (pmd_val(pmd) & (_PAGE_VALID|_PAGE_PMD_HUGE)) != _PAGE_VALID; } int pud_huge(pud_t pud) { return 0; } + +static void hugetlb_free_pte_range(struct mmu_gather *tlb, pmd_t *pmd, + unsigned long addr) +{ + pgtable_t token = pmd_pgtable(*pmd); + + pmd_clear(pmd); + pte_free_tlb(tlb, token, addr); + atomic_long_dec(&tlb->mm->nr_ptes); +} + +static void hugetlb_free_pmd_range(struct mmu_gather *tlb, pud_t *pud, + unsigned long addr, unsigned long end, + unsigned long floor, unsigned long ceiling) +{ + pmd_t *pmd; + unsigned long next; + unsigned long start; + + start = addr; + pmd = pmd_offset(pud, addr); + do { + next = pmd_addr_end(addr, end); + if (pmd_none(*pmd)) + continue; + if (is_hugetlb_pmd(*pmd)) + pmd_clear(pmd); + else + hugetlb_free_pte_range(tlb, pmd, addr); + } while (pmd++, addr = next, addr != end); + + start &= PUD_MASK; + if (start < floor) + return; + if (ceiling) { + ceiling &= PUD_MASK; + if (!ceiling) + return; + } + if (end - 1 > ceiling - 1) + return; + + pmd = pmd_offset(pud, start); + pud_clear(pud); + pmd_free_tlb(tlb, pmd, start); + mm_dec_nr_pmds(tlb->mm); +} + +static void hugetlb_free_pud_range(struct mmu_gather *tlb, pgd_t *pgd, + unsigned long addr, unsigned long end, + unsigned long floor, unsigned long ceiling) +{ + pud_t *pud; + unsigned long next; + unsigned long start; + + start = addr; + pud = pud_offset(pgd, addr); + do { + next = pud_addr_end(addr, end); + if (pud_none_or_clear_bad(pud)) + continue; + hugetlb_free_pmd_range(tlb, pud, addr, next, floor, + ceiling); + } while (pud++, addr = next, addr != end); + + start &= PGDIR_MASK; + if (start < floor) + return; + if (ceiling) { + ceiling &= PGDIR_MASK; + if (!ceiling) + return; + } + if (end - 1 > ceiling - 1) + return; + + pud = pud_offset(pgd, start); + pgd_clear(pgd); + pud_free_tlb(tlb, pud, start); +} + +void hugetlb_free_pgd_range(struct mmu_gather *tlb, + unsigned long addr, unsigned long end, + unsigned long floor, unsigned long ceiling) +{ + pgd_t *pgd; + unsigned long next; + + pgd = pgd_offset(tlb->mm, addr); + do { + next = pgd_addr_end(addr, end); + if (pgd_none_or_clear_bad(pgd)) + continue; + hugetlb_free_pud_range(tlb, pgd, addr, next, floor, ceiling); + } while (pgd++, addr = next, addr != end); +} diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c index aef153f9fdac..65457c9f1365 100644 --- a/arch/sparc/mm/init_64.c +++ b/arch/sparc/mm/init_64.c @@ -347,10 +347,12 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long address, pte_t * #if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE) if ((mm->context.hugetlb_pte_count || mm->context.thp_pte_count) && - is_hugetlb_pte(pte)) + is_hugetlb_pte(pte)) { + /* We are fabricating 8MB pages using 4MB real hw pages. */ + pte_val(pte) |= (address & (1UL << REAL_HPAGE_SHIFT)); __update_mmu_tsb_insert(mm, MM_TSB_HUGE, REAL_HPAGE_SHIFT, address, pte_val(pte)); - else + } else #endif __update_mmu_tsb_insert(mm, MM_TSB_BASE, PAGE_SHIFT, address, pte_val(pte)); |