diff options
| author |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2016-03-08 11:54:42 +0100 |
|---|---|---|
| committer |   Christian Borntraeger <borntraeger@de.ibm.com> | 2016-06-20 09:46:49 +0200 |
| commit | b2d73b2a0ad1c758cb0c1acb01a911744b845942 (patch) | |
| tree | 1b88c5ba8120fc53fc4c9ecb7993e73a7e68c664 /arch/s390/include/asm/gmap.h | |
| parent | s390/mm: use RCU for gmap notifier list and the per-mm gmap list (diff) | |
| download | linux-dev-b2d73b2a0ad1c758cb0c1acb01a911744b845942.tar.xz linux-dev-b2d73b2a0ad1c758cb0c1acb01a911744b845942.zip | |
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/gmap.h')
| -rw-r--r-- | arch/s390/include/asm/gmap.h | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/arch/s390/include/asm/gmap.h b/arch/s390/include/asm/gmap.h index 2cf49624af99..6897a0919446 100644 --- a/arch/s390/include/asm/gmap.h +++ b/arch/s390/include/asm/gmap.h @@ -59,8 +59,11 @@ void gmap_discard(struct gmap *, unsigned long from, unsigned long to); void __gmap_zap(struct gmap *, unsigned long gaddr); void gmap_unlink(struct mm_struct *, unsigned long *table, unsigned long vmaddr); -void gmap_register_ipte_notifier(struct gmap_notifier *); -void gmap_unregister_ipte_notifier(struct gmap_notifier *); -int gmap_ipte_notify(struct gmap *, unsigned long start, unsigned long len); +void gmap_register_pte_notifier(struct gmap_notifier *); +void gmap_unregister_pte_notifier(struct gmap_notifier *); +void gmap_pte_notify(struct mm_struct *, unsigned long addr, pte_t *); + +int gmap_mprotect_notify(struct gmap *, unsigned long start, + unsigned long len, int prot); #endif /* _ASM_S390_GMAP_H */ |