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MIPS: Transparent Huge Pages support

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Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Ralf Baechle
2012-10-18 13:54:15 +02:00
parent f65aad4177
commit 970d032fec
8 changed files with 243 additions and 6 deletions
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31
arch/mips/mm/pgtable-64.c
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@@ -11,6 +11,7 @@
#include <asm/fixmap.h>
#include <asm/pgtable.h>
#include <asm/pgalloc.h>
#include <asm/tlbflush.h>
void pgd_init(unsigned long page)
{
@@ -61,6 +62,36 @@ void pmd_init(unsigned long addr, unsigned long pagetable)
}
#endif
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
void pmdp_splitting_flush(struct vm_area_struct *vma,
unsigned long address,
pmd_t *pmdp)
{
if (!pmd_trans_splitting(*pmdp)) {
pmd_t pmd = pmd_mksplitting(*pmdp);
set_pmd_at(vma->vm_mm, address, pmdp, pmd);
}
}
#endif
pmd_t mk_pmd(struct page *page, pgprot_t prot)
{
pmd_t pmd;
pmd_val(pmd) = (page_to_pfn(page) << _PFN_SHIFT) | pgprot_val(prot);
return pmd;
}
void set_pmd_at(struct mm_struct *mm, unsigned long addr,
pmd_t *pmdp, pmd_t pmd)
{
*pmdp = pmd;
flush_tlb_all();
}
void __init pagetable_init(void)
{
unsigned long vaddr;