diff options
Diffstat (limited to 'arch/sparc/mm/hugetlbpage.c')
| -rw-r--r-- | arch/sparc/mm/hugetlbpage.c | 160 |
1 files changed, 144 insertions, 16 deletions
diff --git a/arch/sparc/mm/hugetlbpage.c b/arch/sparc/mm/hugetlbpage.c index 988acc8b1b80..618a568cc7f2 100644 --- a/arch/sparc/mm/hugetlbpage.c +++ b/arch/sparc/mm/hugetlbpage.c @@ -28,6 +28,7 @@ static unsigned long hugetlb_get_unmapped_area_bottomup(struct file *filp, unsigned long pgoff, unsigned long flags) { + struct hstate *h = hstate_file(filp); unsigned long task_size = TASK_SIZE; struct vm_unmapped_area_info info; @@ -38,7 +39,7 @@ static unsigned long hugetlb_get_unmapped_area_bottomup(struct file *filp, info.length = len; info.low_limit = TASK_UNMAPPED_BASE; info.high_limit = min(task_size, VA_EXCLUDE_START); - info.align_mask = PAGE_MASK & ~HPAGE_MASK; + info.align_mask = PAGE_MASK & ~huge_page_mask(h); info.align_offset = 0; addr = vm_unmapped_area(&info); @@ -58,6 +59,7 @@ hugetlb_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0, const unsigned long pgoff, const unsigned long flags) { + struct hstate *h = hstate_file(filp); struct mm_struct *mm = current->mm; unsigned long addr = addr0; struct vm_unmapped_area_info info; @@ -69,7 +71,7 @@ hugetlb_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0, info.length = len; info.low_limit = PAGE_SIZE; info.high_limit = mm->mmap_base; - info.align_mask = PAGE_MASK & ~HPAGE_MASK; + info.align_mask = PAGE_MASK & ~huge_page_mask(h); info.align_offset = 0; addr = vm_unmapped_area(&info); @@ -94,6 +96,7 @@ unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags) { + struct hstate *h = hstate_file(file); struct mm_struct *mm = current->mm; struct vm_area_struct *vma; unsigned long task_size = TASK_SIZE; @@ -101,7 +104,7 @@ hugetlb_get_unmapped_area(struct file *file, unsigned long addr, if (test_thread_flag(TIF_32BIT)) task_size = STACK_TOP32; - if (len & ~HPAGE_MASK) + if (len & ~huge_page_mask(h)) return -EINVAL; if (len > task_size) return -ENOMEM; @@ -113,7 +116,7 @@ hugetlb_get_unmapped_area(struct file *file, unsigned long addr, } if (addr) { - addr = ALIGN(addr, HPAGE_SIZE); + addr = ALIGN(addr, huge_page_size(h)); vma = find_vma(mm, addr); if (task_size - len >= addr && (!vma || addr + len <= vma->vm_start)) @@ -127,6 +130,112 @@ hugetlb_get_unmapped_area(struct file *file, unsigned long addr, pgoff, flags); } +static pte_t sun4u_hugepage_shift_to_tte(pte_t entry, unsigned int shift) +{ + return entry; +} + +static pte_t sun4v_hugepage_shift_to_tte(pte_t entry, unsigned int shift) +{ + unsigned long hugepage_size = _PAGE_SZ4MB_4V; + + pte_val(entry) = pte_val(entry) & ~_PAGE_SZALL_4V; + + switch (shift) { + case HPAGE_256MB_SHIFT: + hugepage_size = _PAGE_SZ256MB_4V; + pte_val(entry) |= _PAGE_PMD_HUGE; + break; + case HPAGE_SHIFT: + pte_val(entry) |= _PAGE_PMD_HUGE; + break; + default: + WARN_ONCE(1, "unsupported hugepage shift=%u\n", shift); + } + + pte_val(entry) = pte_val(entry) | hugepage_size; + return entry; +} + +static pte_t hugepage_shift_to_tte(pte_t entry, unsigned int shift) +{ + if (tlb_type == hypervisor) + return sun4v_hugepage_shift_to_tte(entry, shift); + else + return sun4u_hugepage_shift_to_tte(entry, shift); +} + +pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma, + struct page *page, int writeable) +{ + unsigned int shift = huge_page_shift(hstate_vma(vma)); + + return hugepage_shift_to_tte(entry, shift); +} + +static unsigned int sun4v_huge_tte_to_shift(pte_t entry) +{ + unsigned long tte_szbits = pte_val(entry) & _PAGE_SZALL_4V; + unsigned int shift; + + switch (tte_szbits) { + case _PAGE_SZ256MB_4V: + shift = HPAGE_256MB_SHIFT; + break; + case _PAGE_SZ4MB_4V: + shift = REAL_HPAGE_SHIFT; + break; + default: + shift = PAGE_SHIFT; + break; + } + return shift; +} + +static unsigned int sun4u_huge_tte_to_shift(pte_t entry) +{ + unsigned long tte_szbits = pte_val(entry) & _PAGE_SZALL_4U; + unsigned int shift; + + switch (tte_szbits) { + case _PAGE_SZ256MB_4U: + shift = HPAGE_256MB_SHIFT; + break; + case _PAGE_SZ4MB_4U: + shift = REAL_HPAGE_SHIFT; + break; + default: + shift = PAGE_SHIFT; + break; + } + return shift; +} + +static unsigned int huge_tte_to_shift(pte_t entry) +{ + unsigned long shift; + + if (tlb_type == hypervisor) + shift = sun4v_huge_tte_to_shift(entry); + else + shift = sun4u_huge_tte_to_shift(entry); + + if (shift == PAGE_SHIFT) + WARN_ONCE(1, "tto_to_shift: invalid hugepage tte=0x%lx\n", + pte_val(entry)); + + return shift; +} + +static unsigned long huge_tte_to_size(pte_t pte) +{ + unsigned long size = 1UL << huge_tte_to_shift(pte); + + if (size == REAL_HPAGE_SIZE) + size = HPAGE_SIZE; + return size; +} + pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr, unsigned long sz) { @@ -160,35 +269,54 @@ 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) { + unsigned int i, nptes, hugepage_shift; + unsigned long size; pte_t orig; + size = huge_tte_to_size(entry); + nptes = size >> PMD_SHIFT; + if (!pte_present(*ptep) && pte_present(entry)) - mm->context.hugetlb_pte_count++; + mm->context.hugetlb_pte_count += nptes; - addr &= HPAGE_MASK; + addr &= ~(size - 1); orig = *ptep; - *ptep = entry; + hugepage_shift = pte_none(orig) ? PAGE_SIZE : huge_tte_to_shift(orig); - /* Issue TLB flush at REAL_HPAGE_SIZE boundaries */ - maybe_tlb_batch_add(mm, addr, ptep, orig, 0); - maybe_tlb_batch_add(mm, addr + REAL_HPAGE_SIZE, ptep, orig, 0); + for (i = 0; i < nptes; i++) + ptep[i] = __pte(pte_val(entry) + (i << PMD_SHIFT)); + + maybe_tlb_batch_add(mm, addr, ptep, orig, 0, hugepage_shift); + /* An HPAGE_SIZE'ed page is composed of two REAL_HPAGE_SIZE'ed pages */ + if (size == HPAGE_SIZE) + maybe_tlb_batch_add(mm, addr + REAL_HPAGE_SIZE, ptep, orig, 0, + hugepage_shift); } pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep) { + unsigned int i, nptes, hugepage_shift; + unsigned long size; pte_t entry; entry = *ptep; + size = huge_tte_to_size(entry); + nptes = size >> PMD_SHIFT; + hugepage_shift = pte_none(entry) ? PAGE_SIZE : huge_tte_to_shift(entry); + if (pte_present(entry)) - mm->context.hugetlb_pte_count--; + mm->context.hugetlb_pte_count -= nptes; - addr &= HPAGE_MASK; - *ptep = __pte(0UL); + addr &= ~(size - 1); + for (i = 0; i < nptes; i++) + ptep[i] = __pte(0UL); - /* Issue TLB flush at REAL_HPAGE_SIZE boundaries */ - maybe_tlb_batch_add(mm, addr, ptep, entry, 0); - maybe_tlb_batch_add(mm, addr + REAL_HPAGE_SIZE, ptep, entry, 0); + maybe_tlb_batch_add(mm, addr, ptep, entry, 0, hugepage_shift); + /* An HPAGE_SIZE'ed page is composed of two REAL_HPAGE_SIZE'ed pages */ + if (size == HPAGE_SIZE) + maybe_tlb_batch_add(mm, addr + REAL_HPAGE_SIZE, ptep, entry, 0, + hugepage_shift); return entry; } |