diff options
Diffstat (limited to 'arch/x86/mm/hugetlbpage.c')
-rw-r--r-- | arch/x86/mm/hugetlbpage.c | 130 |
1 files changed, 0 insertions, 130 deletions
diff --git a/arch/x86/mm/hugetlbpage.c b/arch/x86/mm/hugetlbpage.c index 5804bbae4f01..58f7f2bd535d 100644 --- a/arch/x86/mm/hugetlbpage.c +++ b/arch/x86/mm/hugetlbpage.c @@ -19,136 +19,6 @@ #include <asm/tlbflush.h> #include <asm/elf.h> -/* - * pmd_huge() returns 1 if @pmd is hugetlb related entry, that is normal - * hugetlb entry or non-present (migration or hwpoisoned) hugetlb entry. - * Otherwise, returns 0. - */ -int pmd_huge(pmd_t pmd) -{ - return !pmd_none(pmd) && - (pmd_val(pmd) & (_PAGE_PRESENT|_PAGE_PSE)) != _PAGE_PRESENT; -} - -/* - * pud_huge() returns 1 if @pud is hugetlb related entry, that is normal - * hugetlb entry or non-present (migration or hwpoisoned) hugetlb entry. - * Otherwise, returns 0. - */ -int pud_huge(pud_t pud) -{ -#if CONFIG_PGTABLE_LEVELS > 2 - return !pud_none(pud) && - (pud_val(pud) & (_PAGE_PRESENT|_PAGE_PSE)) != _PAGE_PRESENT; -#else - return 0; -#endif -} - -#ifdef CONFIG_HUGETLB_PAGE -static unsigned long hugetlb_get_unmapped_area_bottomup(struct file *file, - unsigned long addr, unsigned long len, - unsigned long pgoff, unsigned long flags) -{ - struct hstate *h = hstate_file(file); - struct vm_unmapped_area_info info; - - info.flags = 0; - info.length = len; - info.low_limit = get_mmap_base(1); - - /* - * If hint address is above DEFAULT_MAP_WINDOW, look for unmapped area - * in the full address space. - */ - info.high_limit = in_32bit_syscall() ? - task_size_32bit() : task_size_64bit(addr > DEFAULT_MAP_WINDOW); - - info.align_mask = PAGE_MASK & ~huge_page_mask(h); - info.align_offset = 0; - return vm_unmapped_area(&info); -} - -static unsigned long hugetlb_get_unmapped_area_topdown(struct file *file, - unsigned long addr, unsigned long len, - unsigned long pgoff, unsigned long flags) -{ - struct hstate *h = hstate_file(file); - struct vm_unmapped_area_info info; - - info.flags = VM_UNMAPPED_AREA_TOPDOWN; - info.length = len; - info.low_limit = PAGE_SIZE; - info.high_limit = get_mmap_base(0); - - /* - * If hint address is above DEFAULT_MAP_WINDOW, look for unmapped area - * in the full address space. - */ - if (addr > DEFAULT_MAP_WINDOW && !in_32bit_syscall()) - info.high_limit += TASK_SIZE_MAX - DEFAULT_MAP_WINDOW; - - info.align_mask = PAGE_MASK & ~huge_page_mask(h); - info.align_offset = 0; - addr = vm_unmapped_area(&info); - - /* - * A failed mmap() very likely causes application failure, - * so fall back to the bottom-up function here. This scenario - * can happen with large stack limits and large mmap() - * allocations. - */ - if (addr & ~PAGE_MASK) { - VM_BUG_ON(addr != -ENOMEM); - info.flags = 0; - info.low_limit = TASK_UNMAPPED_BASE; - info.high_limit = TASK_SIZE_LOW; - addr = vm_unmapped_area(&info); - } - - return addr; -} - -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; - - if (len & ~huge_page_mask(h)) - return -EINVAL; - - if (len > TASK_SIZE) - return -ENOMEM; - - /* No address checking. See comment at mmap_address_hint_valid() */ - if (flags & MAP_FIXED) { - if (prepare_hugepage_range(file, addr, len)) - return -EINVAL; - return addr; - } - - if (addr) { - addr &= huge_page_mask(h); - if (!mmap_address_hint_valid(addr, len)) - goto get_unmapped_area; - - vma = find_vma(mm, addr); - if (!vma || addr + len <= vm_start_gap(vma)) - return addr; - } - -get_unmapped_area: - if (mm->get_unmapped_area == arch_get_unmapped_area) - return hugetlb_get_unmapped_area_bottomup(file, addr, len, - pgoff, flags); - else - return hugetlb_get_unmapped_area_topdown(file, addr, len, - pgoff, flags); -} -#endif /* CONFIG_HUGETLB_PAGE */ #ifdef CONFIG_X86_64 bool __init arch_hugetlb_valid_size(unsigned long size) |