KVM: s390: do store status after handling STOP_ON_STOP bit
In handle_stop() handle the stop bit before doing the store status as
described for "Stop and Store Status" in the Principles of Operation.
We have to give up the local_int.lock before calling kvm store status
since it calls gmap_fault() which might sleep. Since local_int.lock
only protects local_int.* and not guest memory we can give up the lock.
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
diff --git a/arch/s390/kvm/intercept.c b/arch/s390/kvm/intercept.c
index 776ef83..3614565 100644
--- a/arch/s390/kvm/intercept.c
+++ b/arch/s390/kvm/intercept.c
@@ -133,13 +133,6 @@
vcpu->stat.exit_stop_request++;
spin_lock_bh(&vcpu->arch.local_int.lock);
- if (vcpu->arch.local_int.action_bits & ACTION_STORE_ON_STOP) {
- vcpu->arch.local_int.action_bits &= ~ACTION_STORE_ON_STOP;
- rc = kvm_s390_vcpu_store_status(vcpu,
- KVM_S390_STORE_STATUS_NOADDR);
- if (rc >= 0)
- rc = -EOPNOTSUPP;
- }
if (vcpu->arch.local_int.action_bits & ACTION_RELOADVCPU_ON_STOP) {
vcpu->arch.local_int.action_bits &= ~ACTION_RELOADVCPU_ON_STOP;
@@ -155,7 +148,18 @@
rc = -EOPNOTSUPP;
}
- spin_unlock_bh(&vcpu->arch.local_int.lock);
+ if (vcpu->arch.local_int.action_bits & ACTION_STORE_ON_STOP) {
+ vcpu->arch.local_int.action_bits &= ~ACTION_STORE_ON_STOP;
+ /* store status must be called unlocked. Since local_int.lock
+ * only protects local_int.* and not guest memory we can give
+ * up the lock here */
+ spin_unlock_bh(&vcpu->arch.local_int.lock);
+ rc = kvm_s390_vcpu_store_status(vcpu,
+ KVM_S390_STORE_STATUS_NOADDR);
+ if (rc >= 0)
+ rc = -EOPNOTSUPP;
+ } else
+ spin_unlock_bh(&vcpu->arch.local_int.lock);
return rc;
}