KVM: x86: Use common definition for kvm_nested_vmexit tracepoint

Use the newly introduced TRACE_EVENT_KVM_EXIT to define the guts of
kvm_nested_vmexit so that it captures and prints the same information as
kvm_exit.  This has the bonus side effect of fixing the interrupt info
and error code printing for the case where they're invalid, e.g. if the
exit was a failed VM-Entry.  This also sets the stage for retrieving
EXIT_QUALIFICATION and VM_EXIT_INTR_INFO in nested_vmx_reflect_vmexit()
if and only if the VM-Exit is being routed to L1.
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Message-Id: <20200923201349.16097-7-sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

arch/x86/kvm/svm/svm.c

@@ -2996,12 +2996,7 @@ static int handle_exit(struct kvm_vcpu *vcpu, fastpath_t exit_fastpath)
 	if (is_guest_mode(vcpu)) {
 		int vmexit;
 
-		trace_kvm_nested_vmexit(vcpu, exit_code,
-					svm->vmcb->control.exit_info_1,
-					svm->vmcb->control.exit_info_2,
-					svm->vmcb->control.exit_int_info,
-					svm->vmcb->control.exit_int_info_err,
-					KVM_ISA_SVM);
+		trace_kvm_nested_vmexit(exit_code, vcpu, KVM_ISA_SVM);
 
 		vmexit = nested_svm_exit_special(svm);
 

arch/x86/kvm/trace.h

@@ -586,39 +586,7 @@ TRACE_EVENT(kvm_nested_intercepts,
 /*
  * Tracepoint for #VMEXIT while nested
  */
-TRACE_EVENT(kvm_nested_vmexit,
-	    TP_PROTO(struct kvm_vcpu *vcpu, __u32 exit_code,
-		     __u64 exit_info1, __u64 exit_info2,
-		     __u32 exit_int_info, __u32 exit_int_info_err, __u32 isa),
-	    TP_ARGS(vcpu, exit_code, exit_info1, exit_info2,
-		    exit_int_info, exit_int_info_err, isa),
-
-	TP_STRUCT__entry(
-		__field(	__u64,		rip			)
-		__field(	__u32,		exit_code		)
-		__field(	__u64,		exit_info1		)
-		__field(	__u64,		exit_info2		)
-		__field(	__u32,		exit_int_info		)
-		__field(	__u32,		exit_int_info_err	)
-		__field(	__u32,		isa			)
-	),
-
-	TP_fast_assign(
-		__entry->rip			= kvm_rip_read(vcpu);
-		__entry->exit_code		= exit_code;
-		__entry->exit_info1		= exit_info1;
-		__entry->exit_info2		= exit_info2;
-		__entry->exit_int_info		= exit_int_info;
-		__entry->exit_int_info_err	= exit_int_info_err;
-		__entry->isa			= isa;
-	),
-	TP_printk("rip: 0x%016llx reason: %s%s%s ext_inf1: 0x%016llx "
-		  "ext_inf2: 0x%016llx ext_int: 0x%08x ext_int_err: 0x%08x",
-		  __entry->rip,
-		  kvm_print_exit_reason(__entry->exit_code, __entry->isa),
-		  __entry->exit_info1, __entry->exit_info2,
-		  __entry->exit_int_info, __entry->exit_int_info_err)
-);
+TRACE_EVENT_KVM_EXIT(kvm_nested_vmexit);
 
 /*
  * Tracepoint for #VMEXIT reinjected to the guest

arch/x86/kvm/vmx/nested.c

@@ -5937,10 +5937,7 @@ bool nested_vmx_reflect_vmexit(struct kvm_vcpu *vcpu)
 	exit_intr_info = vmx_get_intr_info(vcpu);
 	exit_qual = vmx_get_exit_qual(vcpu);
 
-	trace_kvm_nested_vmexit(vcpu, exit_reason, exit_qual,
-				vmx->idt_vectoring_info, exit_intr_info,
-				vmcs_read32(VM_EXIT_INTR_ERROR_CODE),
-				KVM_ISA_VMX);
+	trace_kvm_nested_vmexit(exit_reason, vcpu, KVM_ISA_VMX);
 
 	/* If L0 (KVM) wants the exit, it trumps L1's desires. */
 	if (nested_vmx_l0_wants_exit(vcpu, exit_reason))