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>

arch/s390/kvm/diag.c

@@ -15,6 +15,7 @@
 #include <linux/kvm_host.h>
 #include "kvm-s390.h"
 #include "trace.h"
+#include "trace-s390.h"
 
 static int diag_release_pages(struct kvm_vcpu *vcpu)
 {
@@ -99,6 +100,7 @@ static int __diag_ipl_functions(struct kvm_vcpu *vcpu)
 	vcpu->run->exit_reason = KVM_EXIT_S390_RESET;
 	VCPU_EVENT(vcpu, 3, "requesting userspace resets %llx",
 	  vcpu->run->s390_reset_flags);
+	trace_kvm_s390_request_resets(vcpu->run->s390_reset_flags);
 	return -EREMOTE;
 }