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x86: support GB hugepages on 64-bit

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Acked-by: Adam Litke <agl@us.ibm.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andi Kleen 2008-07-23 21:27:50 -07:00 committed by Linus Torvalds
parent ceb8687961
commit 39c11e6c05
1 changed files with 22 additions and 11 deletions
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27
arch/x86/mm/hugetlbpage.c
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@ -134,10 +134,15 @@ pte_t *huge_pte_alloc(struct mm_struct *mm,
pgd = pgd_offset(mm, addr);
pud = pud_alloc(mm, pgd, addr);
if (pud) {
if (sz == PUD_SIZE) {
pte = (pte_t *)pud;
} else {
BUG_ON(sz != PMD_SIZE);
if (pud_none(*pud))
huge_pmd_share(mm, addr, pud);
pte = (pte_t *) pmd_alloc(mm, pud, addr);
}
}
BUG_ON(pte && !pte_none(*pte) && !pte_huge(*pte));
return pte;
@ -152,9 +157,12 @@ pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr)
pgd = pgd_offset(mm, addr);
if (pgd_present(*pgd)) {
pud = pud_offset(pgd, addr);
if (pud_present(*pud))
if (pud_present(*pud)) {
if (pud_large(*pud))
return (pte_t *)pud;
pmd = pmd_offset(pud, addr);
}
}
return (pte_t *) pmd;
}
@ -216,7 +224,7 @@ int pmd_huge(pmd_t pmd)
int pud_huge(pud_t pud)
{
return 0;
return !!(pud_val(pud) & _PAGE_PSE);
}
struct page *
@ -252,6 +260,7 @@ 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 mm_struct *mm = current->mm;
struct vm_area_struct *vma;
unsigned long start_addr;
@ -264,7 +273,7 @@ static unsigned long hugetlb_get_unmapped_area_bottomup(struct file *file,
}
full_search:
addr = ALIGN(start_addr, HPAGE_SIZE);
addr = ALIGN(start_addr, huge_page_size(h));
for (vma = find_vma(mm, addr); ; vma = vma->vm_next) {
/* At this point: (!vma || addr < vma->vm_end). */
@ -286,7 +295,7 @@ full_search:
}
if (addr + mm->cached_hole_size < vma->vm_start)
mm->cached_hole_size = vma->vm_start - addr;
addr = ALIGN(vma->vm_end, HPAGE_SIZE);
addr = ALIGN(vma->vm_end, huge_page_size(h));
}
}
@ -294,6 +303,7 @@ static unsigned long hugetlb_get_unmapped_area_topdown(struct file *file,
unsigned long addr0, 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, *prev_vma;
unsigned long base = mm->mmap_base, addr = addr0;
@ -314,7 +324,7 @@ try_again:
goto fail;
/* either no address requested or cant fit in requested address hole */
addr = (mm->free_area_cache - len) & HPAGE_MASK;
addr = (mm->free_area_cache - len) & huge_page_mask(h);
do {
/*
* Lookup failure means no vma is above this address,
@ -345,7 +355,7 @@ try_again:
largest_hole = vma->vm_start - addr;
/* try just below the current vma->vm_start */
addr = (vma->vm_start - len) & HPAGE_MASK;
addr = (vma->vm_start - len) & huge_page_mask(h);
} while (len <= vma->vm_start);
fail:
@ -383,10 +393,11 @@ 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 & ~HPAGE_MASK)
if (len & ~huge_page_mask(h))
return -EINVAL;
if (len > TASK_SIZE)
return -ENOMEM;
@ -398,7 +409,7 @@ 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))