From 5614dd920a02a524c9abc9573374d81f0535f18a Mon Sep 17 00:00:00 2001 From: Martin Schwidefsky Date: Wed, 22 Apr 2015 14:47:42 +0200 Subject: s390/mm: implement soft-dirty bits for user memory change tracking Use bit 2**1 of the pte and bit 2**14 of the pmd for the soft dirty bit. The fault mechanism to do dirty tracking is already in place. Signed-off-by: Martin Schwidefsky --- arch/s390/mm/hugetlbpage.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'arch/s390/mm') diff --git a/arch/s390/mm/hugetlbpage.c b/arch/s390/mm/hugetlbpage.c index fb4bf2c4379e..f81096b6940d 100644 --- a/arch/s390/mm/hugetlbpage.c +++ b/arch/s390/mm/hugetlbpage.c @@ -40,6 +40,7 @@ static inline pmd_t __pte_to_pmd(pte_t pte) pmd_val(pmd) |= (pte_val(pte) & _PAGE_PROTECT); pmd_val(pmd) |= (pte_val(pte) & _PAGE_DIRTY) << 10; pmd_val(pmd) |= (pte_val(pte) & _PAGE_YOUNG) << 10; + pmd_val(pmd) |= (pte_val(pte) & _PAGE_SOFT_DIRTY) << 13; } else pmd_val(pmd) = _SEGMENT_ENTRY_INVALID; return pmd; @@ -78,6 +79,7 @@ static inline pte_t __pmd_to_pte(pmd_t pmd) pte_val(pte) |= (pmd_val(pmd) & _SEGMENT_ENTRY_PROTECT); pte_val(pte) |= (pmd_val(pmd) & _SEGMENT_ENTRY_DIRTY) >> 10; pte_val(pte) |= (pmd_val(pmd) & _SEGMENT_ENTRY_YOUNG) >> 10; + pte_val(pte) |= (pmd_val(pmd) & _SEGMENT_ENTRY_SOFT_DIRTY) >> 13; } else pte_val(pte) = _PAGE_INVALID; return pte; -- cgit v1.2.3-59-g8ed1b