KVM: s390: trace and count all skey intercepts
Let's trace and count all skey handling operations, even if lazy skey
handling was already activated. Also, don't enable lazy skey handling if
anything went wrong while enabling skey handling for the SIE.
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
diff --git a/arch/s390/kvm/priv.c b/arch/s390/kvm/priv.c
index b8327b8..6745c2a 100644
--- a/arch/s390/kvm/priv.c
+++ b/arch/s390/kvm/priv.c
@@ -152,24 +152,27 @@
static int __skey_check_enable(struct kvm_vcpu *vcpu)
{
int rc = 0;
+
+ trace_kvm_s390_skey_related_inst(vcpu);
if (!(vcpu->arch.sie_block->ictl & (ICTL_ISKE | ICTL_SSKE | ICTL_RRBE)))
return rc;
rc = s390_enable_skey();
- VCPU_EVENT(vcpu, 3, "%s", "enabling storage keys for guest");
- trace_kvm_s390_skey_related_inst(vcpu);
- vcpu->arch.sie_block->ictl &= ~(ICTL_ISKE | ICTL_SSKE | ICTL_RRBE);
+ VCPU_EVENT(vcpu, 3, "enabling storage keys for guest: %d", rc);
+ if (!rc)
+ vcpu->arch.sie_block->ictl &= ~(ICTL_ISKE | ICTL_SSKE | ICTL_RRBE);
return rc;
}
static int handle_skey(struct kvm_vcpu *vcpu)
{
- int rc = __skey_check_enable(vcpu);
+ int rc;
+ vcpu->stat.instruction_storage_key++;
+ rc = __skey_check_enable(vcpu);
if (rc)
return rc;
- vcpu->stat.instruction_storage_key++;
if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);