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Subject[PATCH 6/9] KVM: SVM: Add tracepoint for #vmexit because intr pending
Date
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>
---
arch/x86/kvm/svm.c | 2 +-
arch/x86/kvm/trace.h | 18 ++++++++++++++++++
arch/x86/kvm/x86.c | 1 +
3 files changed, 20 insertions(+), 1 deletions(-)
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 369eeb8..78a391c 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 4d6bb5e..3cc8f44 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 4f90d45..877f910 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -4983,3 +4983,4 @@ 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);
--
1.6.4.3



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