[lttng-dev] [PATCH lttng-modules v2] Add new tracepoint in KVM.

[Mohamad Gebai]

New tracepoint added in kvm: kvm_write_tsc_offset.

Signed-off-by: Mohamad Gebai <mohamad.gebai at polymtl.ca>
---
 .../events/lttng-module/arch/x86/kvm/trace.h       |   23 ++++++++++++++++++++
 .../events/mainline/arch/x86/kvm/trace.h           |   21 ++++++++++++++++++
 2 files changed, 44 insertions(+)

diff --git a/instrumentation/events/lttng-module/arch/x86/kvm/trace.h b/instrumentation/events/lttng-module/arch/x86/kvm/trace.h
index 8e71a7f..5eec169 100644
--- a/instrumentation/events/lttng-module/arch/x86/kvm/trace.h
+++ b/instrumentation/events/lttng-module/arch/x86/kvm/trace.h
@@ -761,6 +761,29 @@ TRACE_EVENT(
 		  __entry->gpa_match ? "GPA" : "GVA")
 )
 
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,11,0))
+TRACE_EVENT(kvm_write_tsc_offset,
+	TP_PROTO(unsigned int vcpu_id, __u64 previous_tsc_offset,
+		 __u64 next_tsc_offset),
+	TP_ARGS(vcpu_id, previous_tsc_offset, next_tsc_offset),
+
+	TP_STRUCT__entry(
+		__field( unsigned int,	vcpu_id				)
+		__field(	__u64,	previous_tsc_offset		)
+		__field(	__u64,	next_tsc_offset			)
+	),
+
+	TP_fast_assign(
+		tp_assign(vcpu_id, vcpu_id)
+		tp_assign(previous_tsc_offset, previous_tsc_offset)
+		tp_assign(next_tsc_offset, next_tsc_offset)
+	),
+
+	TP_printk("vcpu=%u prev=%llu next=%llu", __entry->vcpu_id,
+		  __entry->previous_tsc_offset, __entry->next_tsc_offset)
+)
+#endif
+
 #ifdef CONFIG_X86_64
 
 #define host_clocks					\
diff --git a/instrumentation/events/mainline/arch/x86/kvm/trace.h b/instrumentation/events/mainline/arch/x86/kvm/trace.h
index fe5e00e..545245d 100644
--- a/instrumentation/events/mainline/arch/x86/kvm/trace.h
+++ b/instrumentation/events/mainline/arch/x86/kvm/trace.h
@@ -756,6 +756,27 @@ TRACE_EVENT(
 		  __entry->gpa_match ? "GPA" : "GVA")
 );
 
+TRACE_EVENT(kvm_write_tsc_offset,
+	TP_PROTO(unsigned int vcpu_id, __u64 previous_tsc_offset,
+		 __u64 next_tsc_offset),
+	TP_ARGS(vcpu_id, previous_tsc_offset, next_tsc_offset),
+
+	TP_STRUCT__entry(
+		__field( unsigned int,	vcpu_id				)
+		__field(	__u64,	previous_tsc_offset		)
+		__field(	__u64,	next_tsc_offset			)
+	),
+
+	TP_fast_assign(
+		__entry->vcpu_id		= vcpu_id;
+		__entry->previous_tsc_offset	= previous_tsc_offset;
+		__entry->next_tsc_offset	= next_tsc_offset;
+	),
+
+	TP_printk("vcpu=%u prev=%llu next=%llu", __entry->vcpu_id,
+		  __entry->previous_tsc_offset, __entry->next_tsc_offset)
+);
+
 #ifdef CONFIG_X86_64
 
 #define host_clocks					\
-- 
1.7.10.4