KVM: s390: Add implementation-specific trace events

Introduce a new trace system, kvm-s390, for some kvm/s390 specific
trace points:

- injection of interrupts
- delivery of interrupts to the guest
- creation/destruction of kvm machines and vcpus
- stop actions for vcpus
- reset requests for userspace

Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/arch/s390/kvm/intercept.c b/arch/s390/kvm/intercept.c
index db541d62c771..22798ec33fd1 100644
--- a/arch/s390/kvm/intercept.c
+++ b/arch/s390/kvm/intercept.c
@@ -20,6 +20,7 @@
 #include "kvm-s390.h"
 #include "gaccess.h"
 #include "trace.h"
+#include "trace-s390.h"
 
 static int handle_lctlg(struct kvm_vcpu *vcpu)
 {
@@ -138,6 +139,8 @@ static int handle_stop(struct kvm_vcpu *vcpu)
         vcpu->stat.exit_stop_request++;
         spin_lock_bh(&vcpu->arch.local_int.lock);
 
+        trace_kvm_s390_stop_request(vcpu->arch.local_int.action_bits);
+
         if (vcpu->arch.local_int.action_bits & ACTION_RELOADVCPU_ON_STOP) {
                 vcpu->arch.local_int.action_bits &= ~ACTION_RELOADVCPU_ON_STOP;
                 rc = SIE_INTERCEPT_RERUNVCPU;