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| author |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2015-04-22 14:47:42 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2015-10-14 14:32:05 +0200 |
| commit | 5614dd920a02a524c9abc9573374d81f0535f18a (patch) | |
| tree | 2386960d616f9479556b9e94d51dc5561f42598c /arch/s390/mm | |
| parent | mm: add architecture primitives for software dirty bit clearing (diff) | |
| download | linux-dev-5614dd920a02a524c9abc9573374d81f0535f18a.tar.xz linux-dev-5614dd920a02a524c9abc9573374d81f0535f18a.zip | |
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 <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/mm')
| -rw-r--r-- | arch/s390/mm/hugetlbpage.c | 2 |
1 files changed, 2 insertions, 0 deletions
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; |