tools lib traceevent: Add back in kvm plugins nested_vmexit events

The nested vmexit events were removed from the backport from trace-cmd because
they were considered buggy. They have since been updated in trace-cmd but
are still missing from the traceevent library. Add back in the buggy
version to be able to backport the fixes.

Acked-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/20140613021157.291421941@goodmis.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>

tools/lib/traceevent/plugin_kvm.c

@@ -326,6 +326,35 @@ static int kvm_emulate_insn_handler(struct trace_seq *s,
 	return 0;
 }
 
+
+static int kvm_nested_vmexit_inject_handler(struct trace_seq *s, struct pevent_record *record,
+					    struct event_format *event, void *context)
+{
+	unsigned long long val;
+
+	pevent_print_num_field(s, " rip %0x016llx", event, "rip", record, 1);
+
+	if (pevent_get_field_val(s, event, "exit_code", record, &val, 1) < 0)
+		return -1;
+
+	trace_seq_printf(s, "reason %s", find_exit_reason(2, val));
+
+	pevent_print_num_field(s, " ext_inf1: %0x016llx", event, "exit_info1", record, 1);
+	pevent_print_num_field(s, " ext_inf2: %0x016llx", event, "exit_info2", record, 1);
+	pevent_print_num_field(s, " ext_int: %0x016llx", event, "exit_int_info", record, 1);
+	pevent_print_num_field(s, " ext_int_err: %0x016llx", event, "exit_int_info_err", record, 1);
+
+	return 0;
+}
+
+static int kvm_nested_vmexit_handler(struct trace_seq *s, struct pevent_record *record,
+				     struct event_format *event, void *context)
+{
+	pevent_print_num_field(s, " rip %0x016llx", event, "rip", record, 1);
+
+	return kvm_nested_vmexit_inject_handler(s, record, event, context);
+}
+
 union kvm_mmu_page_role {
 	unsigned word;
 	struct {
@@ -422,6 +451,12 @@ int PEVENT_PLUGIN_LOADER(struct pevent *pevent)
 	pevent_register_event_handler(pevent, -1, "kvm", "kvm_emulate_insn",
 				      kvm_emulate_insn_handler, NULL);
 
+	pevent_register_event_handler(pevent, -1, "kvm", "kvm_nested_vmexit",
+				      kvm_nested_vmexit_handler, NULL);
+
+	pevent_register_event_handler(pevent, -1, "kvm", "kvm_nested_vmexit_inject",
+				      kvm_nested_vmexit_inject_handler, NULL);
+
 	pevent_register_event_handler(pevent, -1, "kvmmmu", "kvm_mmu_get_page",
 				      kvm_mmu_get_page_handler, NULL);
 
@@ -456,6 +491,12 @@ void PEVENT_PLUGIN_UNLOADER(struct pevent *pevent)
 	pevent_unregister_event_handler(pevent, -1, "kvm", "kvm_emulate_insn",
 					kvm_emulate_insn_handler, NULL);
 
+	pevent_unregister_event_handler(pevent, -1, "kvm", "kvm_nested_vmexit",
+					kvm_nested_vmexit_handler, NULL);
+
+	pevent_unregister_event_handler(pevent, -1, "kvm", "kvm_nested_vmexit_inject",
+					kvm_nested_vmexit_inject_handler, NULL);
+
 	pevent_unregister_event_handler(pevent, -1, "kvmmmu", "kvm_mmu_get_page",
 					kvm_mmu_get_page_handler, NULL);