KVM/VMX: Add host irq information in trace event when updating IRTE for posted interrupts

Add host irq information in trace event, so we can better understand
which irq is in posted mode.
Signed-off-by: Feng Wu <feng.wu@intel.com>
Reviewed-by: Radim Krcmar <rkrcmar@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

arch/x86/kvm/trace.h

@@ -996,11 +996,13 @@ TRACE_EVENT(kvm_enter_smm,
  * Tracepoint for VT-d posted-interrupts.
  */
 TRACE_EVENT(kvm_pi_irte_update,
-	TP_PROTO(unsigned int vcpu_id, unsigned int gsi,
-		 unsigned int gvec, u64 pi_desc_addr, bool set),
-	TP_ARGS(vcpu_id, gsi, gvec, pi_desc_addr, set),
+	TP_PROTO(unsigned int host_irq, unsigned int vcpu_id,
+		 unsigned int gsi, unsigned int gvec,
+		 u64 pi_desc_addr, bool set),
+	TP_ARGS(host_irq, vcpu_id, gsi, gvec, pi_desc_addr, set),
 
 	TP_STRUCT__entry(
+		__field(	unsigned int,	host_irq	)
 		__field(	unsigned int,	vcpu_id		)
 		__field(	unsigned int,	gsi		)
 		__field(	unsigned int,	gvec		)
@@ -1009,6 +1011,7 @@ TRACE_EVENT(kvm_pi_irte_update,
 	),
 
 	TP_fast_assign(
+		__entry->host_irq	= host_irq;
 		__entry->vcpu_id	= vcpu_id;
 		__entry->gsi		= gsi;
 		__entry->gvec		= gvec;
@@ -1016,9 +1019,10 @@ TRACE_EVENT(kvm_pi_irte_update,
 		__entry->set		= set;
 	),
 
-	TP_printk("VT-d PI is %s for this irq, vcpu %u, gsi: 0x%x, "
+	TP_printk("VT-d PI is %s for irq %u, vcpu %u, gsi: 0x%x, "
 		  "gvec: 0x%x, pi_desc_addr: 0x%llx",
 		  __entry->set ? "enabled and being updated" : "disabled",
+		  __entry->host_irq,
 		  __entry->vcpu_id,
 		  __entry->gsi,
 		  __entry->gvec,

arch/x86/kvm/vmx.c

@@ -10783,7 +10783,7 @@ static int vmx_update_pi_irte(struct kvm *kvm, unsigned int host_irq,
 		vcpu_info.pi_desc_addr = __pa(vcpu_to_pi_desc(vcpu));
 		vcpu_info.vector = irq.vector;
 
-		trace_kvm_pi_irte_update(vcpu->vcpu_id, e->gsi,
+		trace_kvm_pi_irte_update(vcpu->vcpu_id, host_irq, e->gsi,
 				vcpu_info.vector, vcpu_info.pi_desc_addr, set);
 
 		if (set)