[S390] cleanup facility list handling

Store the facility list once at system startup with stfl/stfle and
reuse the result for all facility tests.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/arch/s390/kvm/priv.c b/arch/s390/kvm/priv.c
index 44205507717c..9194a4b52b22 100644
--- a/arch/s390/kvm/priv.c
+++ b/arch/s390/kvm/priv.c
@@ -154,12 +154,12 @@ static int handle_chsc(struct kvm_vcpu *vcpu)
 
 static int handle_stfl(struct kvm_vcpu *vcpu)
 {
-        unsigned int facility_list = stfl();
+        unsigned int facility_list;
         int rc;
 
         vcpu->stat.instruction_stfl++;
         /* only pass the facility bits, which we can handle */
-        facility_list &= 0xff00fff3;
+        facility_list = S390_lowcore.stfl_fac_list & 0xff00fff3;
 
         rc = copy_to_guest(vcpu, offsetof(struct _lowcore, stfl_fac_list),
                            &facility_list, sizeof(facility_list));