KVM: s390: Clear storage keys

page_table_reset_pgste() already does a complete page table walk to
reset the pgste. Enhance it to initialize the storage keys to
PAGE_DEFAULT_KEY if requested by the caller. This will be used
for lazy storage key handling. Also provide an empty stub for
!CONFIG_PGSTE

Lets adopt the current code (diag 308) to not clear the keys.

Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com>
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/arch/s390/kvm/diag.c b/arch/s390/kvm/diag.c
index 08dfc839a6cf..44dcfa8860b5 100644
--- a/arch/s390/kvm/diag.c
+++ b/arch/s390/kvm/diag.c
@@ -169,15 +169,15 @@ static int __diag_ipl_functions(struct kvm_vcpu *vcpu)
         switch (subcode) {
         case 0:
         case 1:
-                page_table_reset_pgste(current->mm, 0, TASK_SIZE);
+                page_table_reset_pgste(current->mm, 0, TASK_SIZE, false);
                 return -EOPNOTSUPP;
         case 3:
                 vcpu->run->s390_reset_flags = KVM_S390_RESET_CLEAR;
-                page_table_reset_pgste(current->mm, 0, TASK_SIZE);
+                page_table_reset_pgste(current->mm, 0, TASK_SIZE, false);
                 break;
         case 4:
                 vcpu->run->s390_reset_flags = 0;
-                page_table_reset_pgste(current->mm, 0, TASK_SIZE);
+                page_table_reset_pgste(current->mm, 0, TASK_SIZE, false);
                 break;
         default:
                 return -EOPNOTSUPP;