tree 4043afa6362bb3b190f93f8231669da13bfaab68
parent f4debb40903978bbddfb9e877ca4d2f27e26567f
author David Hildenbrand <dahi@linux.vnet.ibm.com> 1460992799 +0200
committer Christian Borntraeger <borntraeger@de.ibm.com> 1466409285 +0200

s390/mm: push ste protection down to shadow pte

If a guest ste is read-only, it doesn't make sense to force the ptes in as
writable in the host. If the source page is read-only in the host, it won't
have to be made writable. Please note that if the source page is not
available, it will still be faulted in writable. This can be changed
internally later on.

If ste protection is removed, underlying shadow tables are also removed,
therefore this change does not affect the guest.

Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>