This patch adds a tracepoint for every #vmexit we get from a
nested guest.
Signed-off-by: Joerg Roedel <joerg.roedel@xxxxxxx>
---
arch/x86/kvm/svm.c | 6 ++++++
arch/x86/kvm/trace.h | 36 ++++++++++++++++++++++++++++++++++++
arch/x86/kvm/x86.c | 1 +
3 files changed, 43 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 8de84be..e759732 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -2355,6 +2355,12 @@ static int handle_exit(struct kvm_vcpu *vcpu)
if (is_nested(svm)) {
int vmexit;
+ trace_kvm_nested_vmexit(svm->vmcb->save.rip, 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);
+
nsvm_printk("nested handle_exit: 0x%x | 0x%lx | 0x%lx | 0x%lx\n",
exit_code, svm->vmcb->control.exit_info_1,
svm->vmcb->control.exit_info_2, svm->vmcb->save.rip);
diff --git a/arch/x86/kvm/trace.h b/arch/x86/kvm/trace.h
index d63272c..a0b89c3 100644
--- a/arch/x86/kvm/trace.h
+++ b/arch/x86/kvm/trace.h
@@ -382,6 +382,42 @@ TRACE_EVENT(kvm_nested_vmrun,
__entry->npt ? "on" : "off")
);
+/*
+ * Tracepoint for #VMEXIT while nested
+ */
+TRACE_EVENT(kvm_nested_vmexit,
+ TP_PROTO(__u64 rip, __u32 exit_code,
+ __u64 exit_info1, __u64 exit_info2,
+ __u32 exit_int_info, __u32 exit_int_info_err),
+ TP_ARGS(rip, exit_code, exit_info1, exit_info2,
+ exit_int_info, exit_int_info_err),
+
+ 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 )
+ ),
+
+ TP_fast_assign(
+ __entry->rip = rip;
+ __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;
+ ),
+ TP_printk("rip=0x%016llx reason=%s ext_inf1=0x%016llx "
+ "ext_inf2=0x%016llx ext_int=0x%08x ext_int_err=0x%08x\n",
+ __entry->rip,
+ ftrace_print_symbols_seq(p, __entry->exit_code,
+ kvm_x86_ops->exit_reasons_str),
+ __entry->exit_info1, __entry->exit_info2,
+ __entry->exit_int_info, __entry->exit_int_info_err)
+);
+
#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 b51a824..416282e 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -4998,3 +4998,4 @@ 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_vmexit);
--
1.6.4.3
--
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