KVM: SVM: Add tracepoint for #vmexit because intr pending

This patch adds a special tracepoint for the event that a
nested #vmexit is injected because kvm wants to inject an
interrupt into the guest.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

3 files changed, 20 insertions, 1 deletions

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 369eeb86e87c..78a391c60a75 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -1390,7 +1390,7 @@ static inline int nested_svm_intr(struct vcpu_svm *svm)
                  * the #vmexit here.
                  */
                 svm->nested.exit_required = true;
-                nsvm_printk("VMexit -> INTR\n");
+                trace_kvm_nested_intr_vmexit(svm->vmcb->save.rip);
                 return 1;
         }
 
diff --git a/arch/x86/kvm/trace.h b/arch/x86/kvm/trace.h
index 4d6bb5ee39b5..3cc8f444be14 100644
--- a/arch/x86/kvm/trace.h
+++ b/arch/x86/kvm/trace.h
@@ -451,6 +451,24 @@ TRACE_EVENT(kvm_nested_vmexit_inject,
                 __entry->exit_info1, __entry->exit_info2,
                 __entry->exit_int_info, __entry->exit_int_info_err)
 );
+
+/*
+ * Tracepoint for nested #vmexit because of interrupt pending
+ */
+TRACE_EVENT(kvm_nested_intr_vmexit,
+            TP_PROTO(__u64 rip),
+            TP_ARGS(rip),
+
+        TP_STRUCT__entry(
+                __field(        __u64,  rip     )
+        ),
+
+        TP_fast_assign(
+                __entry->rip    =       rip
+        ),
+
+        TP_printk("rip: 0x%016llx\n", __entry->rip)
+);
 #endif /* _TRACE_KVM_H */
 
 /* This part must be outside protection */
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index a522d9ba81b3..2cf4146b425a 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -4987,3 +4987,4 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_cr);
 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmrun);
 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit);
 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit_inject);
+EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intr_vmexit);