KVM: s390: handle missing storage-key facility

Without the storage-key facility, SIE won't interpret SSKE, ISKE and
RRBE for us. So let's add proper interception handlers that will be called
if lazy sske cannot be enabled.

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

1 files changed, 1 insertions, 0 deletions

diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index 2f6702e27db9..9951e7e59756 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -896,6 +896,7 @@ int set_guest_storage_key(struct mm_struct *mm, unsigned long addr,
 int cond_set_guest_storage_key(struct mm_struct *mm, unsigned long addr,
                                unsigned char key, unsigned char *oldkey,
                                bool nq, bool mr, bool mc);
+int reset_guest_reference_bit(struct mm_struct *mm, unsigned long addr);
 int get_guest_storage_key(struct mm_struct *mm, unsigned long addr,
                           unsigned char *key);