KVM: x86: Update trace function for nested VM entry to support VMX

Update trace function for nested VM entry to support VMX. Existing trace
function only supports nested VMX and the information printed out is AMD
specific.

So, rename trace_kvm_nested_vmrun() to trace_kvm_nested_vmenter(), since
'vmenter' is generic. Add a new field 'isa' to recognize Intel and AMD;
Update the output to print out VMX/SVM related naming respectively, eg.,
vmcb vs. vmcs; npt vs. ept.

Opportunistically update the call site of trace_kvm_nested_vmenter() to
make one line per parameter.
Signed-off-by: Mingwei Zhang <mizhang@google.com>
Link: https://lore.kernel.org/r/20220825225755.907001-2-mizhang@google.com
[sean: align indentation, s/update/rename in changelog]
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

arch/x86/kvm/svm/nested.c

@@ -781,11 +781,13 @@ int enter_svm_guest_mode(struct kvm_vcpu *vcpu, u64 vmcb12_gpa,
 	struct vcpu_svm *svm = to_svm(vcpu);
 	int ret;
 
-	trace_kvm_nested_vmrun(svm->vmcb->save.rip, vmcb12_gpa,
-			       vmcb12->save.rip,
-			       vmcb12->control.int_ctl,
-			       vmcb12->control.event_inj,
-			       vmcb12->control.nested_ctl);
+	trace_kvm_nested_vmenter(svm->vmcb->save.rip,
+				 vmcb12_gpa,
+				 vmcb12->save.rip,
+				 vmcb12->control.int_ctl,
+				 vmcb12->control.event_inj,
+				 vmcb12->control.nested_ctl,
+				 KVM_ISA_SVM);
 
 	trace_kvm_nested_intercepts(vmcb12->control.intercepts[INTERCEPT_CR] & 0xffff,
 				    vmcb12->control.intercepts[INTERCEPT_CR] >> 16,

arch/x86/kvm/trace.h

@@ -594,10 +594,10 @@ TRACE_EVENT(kvm_pv_eoi,
 /*
  * Tracepoint for nested VMRUN
  */
-TRACE_EVENT(kvm_nested_vmrun,
+TRACE_EVENT(kvm_nested_vmenter,
 	    TP_PROTO(__u64 rip, __u64 vmcb, __u64 nested_rip, __u32 int_ctl,
-		     __u32 event_inj, bool npt),
-	    TP_ARGS(rip, vmcb, nested_rip, int_ctl, event_inj, npt),
+		     __u32 event_inj, bool tdp_enabled, __u32 isa),
+	    TP_ARGS(rip, vmcb, nested_rip, int_ctl, event_inj, tdp_enabled, isa),
 
 	TP_STRUCT__entry(
 		__field(	__u64,		rip		)
@@ -605,7 +605,8 @@ TRACE_EVENT(kvm_nested_vmrun,
 		__field(	__u64,		nested_rip	)
 		__field(	__u32,		int_ctl		)
 		__field(	__u32,		event_inj	)
-		__field(	bool,		npt		)
+		__field(	bool,		tdp_enabled	)
+		__field(	__u32,		isa		)
 	),
 
 	TP_fast_assign(
@@ -614,14 +615,20 @@ TRACE_EVENT(kvm_nested_vmrun,
 		__entry->nested_rip	= nested_rip;
 		__entry->int_ctl	= int_ctl;
 		__entry->event_inj	= event_inj;
-		__entry->npt		= npt;
-	),
-
-	TP_printk("rip: 0x%016llx vmcb: 0x%016llx nrip: 0x%016llx int_ctl: 0x%08x "
-		  "event_inj: 0x%08x npt: %s",
-		__entry->rip, __entry->vmcb, __entry->nested_rip,
-		__entry->int_ctl, __entry->event_inj,
-		__entry->npt ? "on" : "off")
+		__entry->tdp_enabled	= tdp_enabled;
+		__entry->isa		= isa;
+	),
+
+	TP_printk("rip: 0x%016llx %s: 0x%016llx nested_rip: 0x%016llx "
+		  "int_ctl: 0x%08x event_inj: 0x%08x nested_%s: %s",
+		  __entry->rip,
+		  __entry->isa == KVM_ISA_VMX ? "vmcs" : "vmcb",
+		  __entry->vmcb,
+		  __entry->nested_rip,
+		  __entry->int_ctl,
+		  __entry->event_inj,
+		  __entry->isa == KVM_ISA_VMX ? "ept" : "npt",
+		  __entry->tdp_enabled ? "on" : "off")
 );
 
 TRACE_EVENT(kvm_nested_intercepts,

arch/x86/kvm/x86.c

@@ -13381,7 +13381,7 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_inj_virq);
 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_page_fault);
 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_msr);
 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_cr);
-EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmrun);
+EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmenter);
 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit);
 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit_inject);
 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intr_vmexit);