KVM: s390: VCPU_EVENT cleanup for prefix changes

SPX (SET PREFIX)  and SIGP (Set prefix) can change the prefix
register of a CPU. As sigp set prefix may be handled in user
space (KVM_CAP_S390_USER_SIGP), we would not log the changes
triggered via SIGP in that case. Let's have just one VCPU_EVENT
at the central location that tracks prefix changes.

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

4 files changed, 2 insertions, 6 deletions

diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c
index c98d89708e99..8b3a1178cb0b 100644
--- a/arch/s390/kvm/interrupt.c
+++ b/arch/s390/kvm/interrupt.c
@@ -427,7 +427,6 @@ static int __must_check __deliver_set_prefix(struct kvm_vcpu *vcpu)
         clear_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs);
         spin_unlock(&li->lock);
 
-        VCPU_EVENT(vcpu, 4, "interrupt: set prefix to %x", prefix.address);
         vcpu->stat.deliver_prefix_signal++;
         trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
                                          KVM_S390_SIGP_SET_PREFIX,
diff --git a/arch/s390/kvm/kvm-s390.h b/arch/s390/kvm/kvm-s390.h
index 81de2af28c9c..0ee5db11598b 100644
--- a/arch/s390/kvm/kvm-s390.h
+++ b/arch/s390/kvm/kvm-s390.h
@@ -65,6 +65,8 @@ static inline u32 kvm_s390_get_prefix(struct kvm_vcpu *vcpu)
 
 static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix)
 {
+        VCPU_EVENT(vcpu, 3, "set prefix of cpu %03u to 0x%x", vcpu->vcpu_id,
+                   prefix);
         vcpu->arch.sie_block->prefix = prefix >> GUEST_PREFIX_SHIFT;
         kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
         kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu);
diff --git a/arch/s390/kvm/priv.c b/arch/s390/kvm/priv.c
index 1b95d2934472..2658a7919c5e 100644
--- a/arch/s390/kvm/priv.c
+++ b/arch/s390/kvm/priv.c
@@ -98,8 +98,6 @@ static int handle_set_prefix(struct kvm_vcpu *vcpu)
                 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
 
         kvm_s390_set_prefix(vcpu, address);
-
-        VCPU_EVENT(vcpu, 5, "setting prefix to %x", address);
         trace_kvm_s390_handle_prefix(vcpu, 1, address);
         return 0;
 }
diff --git a/arch/s390/kvm/sigp.c b/arch/s390/kvm/sigp.c
index 72e58bd2bee7..5318ea3ad1d3 100644
--- a/arch/s390/kvm/sigp.c
+++ b/arch/s390/kvm/sigp.c
@@ -205,9 +205,6 @@ static int __sigp_set_prefix(struct kvm_vcpu *vcpu, struct kvm_vcpu *dst_vcpu,
                 *reg &= 0xffffffff00000000UL;
                 *reg |= SIGP_STATUS_INCORRECT_STATE;
                 return SIGP_CC_STATUS_STORED;
-        } else if (rc == 0) {
-                VCPU_EVENT(vcpu, 4, "set prefix of cpu %02x to %x",
-                           dst_vcpu->vcpu_id, irq.u.prefix.address);
         }
 
         return rc;