Release 4.10 arch/sparc/mm/hugetlbpage.c

Directory: arch/sparc/mm
/*
 * SPARC64 Huge TLB page support.
 *
 * Copyright (C) 2002, 2003, 2006 David S. Miller (davem@davemloft.net)
 */

#include <linux/fs.h>
#include <linux/mm.h>
#include <linux/hugetlb.h>
#include <linux/pagemap.h>
#include <linux/sysctl.h>

#include <asm/mman.h>
#include <asm/pgalloc.h>
#include <asm/pgtable.h>
#include <asm/tlb.h>
#include <asm/tlbflush.h>
#include <asm/cacheflush.h>
#include <asm/mmu_context.h>

/* Slightly simplified from the non-hugepage variant because by
 * definition we don't have to worry about any page coloring stuff
 */



static unsigned long hugetlb_get_unmapped_area_bottomup(struct file *filp,
							unsigned long addr,
							unsigned long len,
							unsigned long pgoff,
							unsigned long flags)
{
	unsigned long task_size = TASK_SIZE;
	struct vm_unmapped_area_info info;

	if (test_thread_flag(TIF_32BIT))
		task_size = STACK_TOP32;

	info.flags = 0;
	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_offset = 0;
	addr = vm_unmapped_area(&info);

	if ((addr & ~PAGE_MASK) && task_size > VA_EXCLUDE_END) {
		VM_BUG_ON(addr != -ENOMEM);
		info.low_limit = VA_EXCLUDE_END;
		info.high_limit = task_size;
		addr = vm_unmapped_area(&info);
	}

	return addr;
}

Contributors
Person Tokens Prop Commits CommitProp
david s. miller david s. miller 83 56.46% 1 50.00%
michel lespinasse michel lespinasse 64 43.54% 1 50.00%
Total 147 100.00% 2 100.00%


static unsigned long

hugetlb_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0,
				  const unsigned long len,
				  const unsigned long pgoff,
				  const unsigned long flags)
{
	struct mm_struct *mm = current->mm;
	unsigned long addr = addr0;
	struct vm_unmapped_area_info info;

	/* This should only ever run for 32-bit processes.  */
	BUG_ON(!test_thread_flag(TIF_32BIT));

	info.flags = VM_UNMAPPED_AREA_TOPDOWN;
	info.length = len;
	info.low_limit = PAGE_SIZE;
	info.high_limit = mm->mmap_base;
	info.align_mask = PAGE_MASK & ~HPAGE_MASK;
	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 = STACK_TOP32;
		addr = vm_unmapped_area(&info);
	}

	return addr;
}

Contributors
Person Tokens Prop Commits CommitProp
david s. miller david s. miller 99 63.06% 1 50.00%
michel lespinasse michel lespinasse 58 36.94% 1 50.00%
Total 157 100.00% 2 100.00%


unsigned long

hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
		unsigned long len, unsigned long pgoff, unsigned long flags)
{
	struct mm_struct *mm = current->mm;
	struct vm_area_struct *vma;
	unsigned long task_size = TASK_SIZE;

	if (test_thread_flag(TIF_32BIT))
		task_size = STACK_TOP32;

	if (len & ~HPAGE_MASK)
		return -EINVAL;
	if (len > task_size)
		return -ENOMEM;

	if (flags & MAP_FIXED) {
		if (prepare_hugepage_range(file, addr, len))
			return -EINVAL;
		return addr;
	}

	if (addr) {
		addr = ALIGN(addr, HPAGE_SIZE);
		vma = find_vma(mm, addr);
		if (task_size - len >= addr &&
		    (!vma || addr + len <= vma->vm_start))
			return addr;
	}
	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);
}

Contributors
Person Tokens Prop Commits CommitProp
david s. miller david s. miller 164 86.32% 1 33.33%
benjamin herrenschmidt benjamin herrenschmidt 24 12.63% 1 33.33%
andi kleen andi kleen 2 1.05% 1 33.33%
Total 190 100.00% 3 100.00%



pte_t *huge_pte_alloc(struct mm_struct *mm,
			unsigned long addr, unsigned long sz)
{
	pgd_t *pgd;
	pud_t *pud;
	pte_t *pte = NULL;

	pgd = pgd_offset(mm, addr);
	pud = pud_alloc(mm, pgd, addr);
	if (pud)
		pte = (pte_t *)pmd_alloc(mm, pud, addr);

	return pte;
}

Contributors
Person Tokens Prop Commits CommitProp
david s. miller david s. miller 66 88.00% 4 66.67%
nitin gupta nitin gupta 5 6.67% 1 16.67%
andi kleen andi kleen 4 5.33% 1 16.67%
Total 75 100.00% 6 100.00%



pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr)
{
	pgd_t *pgd;
	pud_t *pud;
	pte_t *pte = NULL;

	pgd = pgd_offset(mm, addr);
	if (!pgd_none(*pgd)) {
		pud = pud_offset(pgd, addr);
		if (!pud_none(*pud))
			pte = (pte_t *)pmd_offset(pud, addr);
	}
	return pte;
}

Contributors
Person Tokens Prop Commits CommitProp
david s. miller david s. miller 78 93.98% 4 80.00%
nitin gupta nitin gupta 5 6.02% 1 20.00%
Total 83 100.00% 5 100.00%



void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
		     pte_t *ptep, pte_t entry)
{
	pte_t orig;

	if (!pte_present(*ptep) && pte_present(entry))
		mm->context.hugetlb_pte_count++;

	addr &= HPAGE_MASK;
	orig = *ptep;
	*ptep = entry;

	/* 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);
}

Contributors
Person Tokens Prop Commits CommitProp
david s. miller david s. miller 42 47.73% 4 50.00%
nitin gupta nitin gupta 39 44.32% 2 25.00%
david gibson david gibson 6 6.82% 1 12.50%
mike kravetz mike kravetz 1 1.14% 1 12.50%
Total 88 100.00% 8 100.00%



pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
			      pte_t *ptep)
{
	pte_t entry;

	entry = *ptep;
	if (pte_present(entry))
		mm->context.hugetlb_pte_count--;

	addr &= HPAGE_MASK;
	*ptep = __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);

	return entry;
}

Contributors
Person Tokens Prop Commits CommitProp
nitin gupta nitin gupta 28 33.33% 2 22.22%
david s. miller david s. miller 28 33.33% 5 55.56%
david gibson david gibson 27 32.14% 1 11.11%
mike kravetz mike kravetz 1 1.19% 1 11.11%
Total 84 100.00% 9 100.00%



int pmd_huge(pmd_t pmd)
{
	return !pmd_none(pmd) &&
		(pmd_val(pmd) & (_PAGE_VALID|_PAGE_PMD_HUGE)) != _PAGE_VALID;
}

Contributors
Person Tokens Prop Commits CommitProp
nitin gupta nitin gupta 20 66.67% 1 50.00%
david gibson david gibson 10 33.33% 1 50.00%
Total 30 100.00% 2 100.00%



int pud_huge(pud_t pud)
{
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
andi kleen andi kleen 11 100.00% 1 100.00%
Total 11 100.00% 1 100.00%



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);
}

Contributors
Person Tokens Prop Commits CommitProp
nitin gupta nitin gupta 52 100.00% 1 100.00%
Total 52 100.00% 1 100.00%



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);
}

Contributors
Person Tokens Prop Commits CommitProp
nitin gupta nitin gupta 182 100.00% 1 100.00%
Total 182 100.00% 1 100.00%



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);
}

Contributors
Person Tokens Prop Commits CommitProp
nitin gupta nitin gupta 166 100.00% 1 100.00%
Total 166 100.00% 1 100.00%



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);
}
Contributors
Person Tokens Prop Commits CommitProp
nitin gupta nitin gupta 94 100.00% 1 100.00%
Total 94 100.00% 1 100.00%

Overall Contributors
Person Tokens Prop Commits CommitProp
nitin gupta nitin gupta 594 42.52% 2 11.76%
david s. miller david s. miller 592 42.38% 8 47.06%
michel lespinasse michel lespinasse 122 8.73% 1 5.88%
david gibson david gibson 43 3.08% 1 5.88%
benjamin herrenschmidt benjamin herrenschmidt 24 1.72% 1 5.88%
andi kleen andi kleen 17 1.22% 2 11.76%
andrew morton andrew morton 3 0.21% 1 5.88%
mike kravetz mike kravetz 2 0.14% 1 5.88%
Total 1397 100.00% 17 100.00%
Directory: arch/sparc/mm

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
	Person	Tokens	Prop	Commits	CommitProp
david s. miller	david s. miller	83	56.46%	1	50.00%
michel lespinasse	michel lespinasse	64	43.54%	1	50.00%
	Total	147	100.00%	2	100.00%
cregit-Linux how code gets into the kernel

Release 4.10 arch/sparc/mm/hugetlbpage.c

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Overall Contributors
