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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2016-03-08 13:54:42 +0300 |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@de.ibm.com> | 2016-06-20 10:46:49 +0300 |
| commit | b2d73b2a0ad1c758cb0c1acb01a911744b845942 (patch) | |
| tree | 1b88c5ba8120fc53fc4c9ecb7993e73a7e68c664 /arch/s390/include/asm/pgtable.h | |
| parent | 8ecb1a59d6c6674bc98e4eee0c2482490748e21a (diff) | |
| download | linux-b2d73b2a0ad1c758cb0c1acb01a911744b845942.tar.xz | |
s390/mm: extended gmap pte notifier
The current gmap pte notifier forces a pte into to a read-write state.
If the pte is invalidated the gmap notifier is called to inform KVM
that the mapping will go away.
Extend this approach to allow read-write, read-only and no-access
as possible target states and call the pte notifier for any change
to the pte.
This mechanism is used to temporarily set specific access rights for
a pte without doing the heavy work of a true mprotect call.
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/pgtable.h')
| -rw-r--r-- | arch/s390/include/asm/pgtable.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h index 9951e7e59756..35dde6afffcf 100644 --- a/arch/s390/include/asm/pgtable.h +++ b/arch/s390/include/asm/pgtable.h @@ -886,6 +886,8 @@ void ptep_set_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t entry); void ptep_set_notify(struct mm_struct *mm, unsigned long addr, pte_t *ptep); void ptep_notify(struct mm_struct *mm, unsigned long addr, pte_t *ptep); +int ptep_force_prot(struct mm_struct *mm, unsigned long gaddr, + pte_t *ptep, int prot); void ptep_zap_unused(struct mm_struct *mm, unsigned long addr, pte_t *ptep , int reset); void ptep_zap_key(struct mm_struct *mm, unsigned long addr, pte_t *ptep); |