tools lib traceevent: Factor out print_exit_reason in kvm plugin

We will reuse it for nested vmexit tracepoints.

Link: http://lkml.kernel.org/r/619c418c8af87f03027b8c8013b0443996605700.1388855989.git.jan.kiszka@web.de
Acked-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>

diff --git a/tools/lib/traceevent/plugin_kvm.c b/tools/lib/traceevent/plugin_kvm.c
index 3e6122067d67d4ff5ed43caa5746ee72d64aace1..2d7d1d7df0a8748764ca7505f28ca4f9b92769de 100644 (file)
--- a/tools/lib/traceevent/plugin_kvm.c
+++ b/tools/lib/traceevent/plugin_kvm.c
@@ -244,15 +244,14 @@ static const char *find_exit_reason(unsigned isa, int val)
        return strings[i].str;
 }
 
-static int kvm_exit_handler(struct trace_seq *s, struct pevent_record *record,
-                           struct event_format *event, void *context)
+static int print_exit_reason(struct trace_seq *s, struct pevent_record *record,
+                            struct event_format *event, const char *field)
 {
        unsigned long long isa;
        unsigned long long val;
-       unsigned long long info1 = 0, info2 = 0;
        const char *reason;
 
-       if (pevent_get_field_val(s, event, "exit_reason", record, &val, 1) < 0)
+       if (pevent_get_field_val(s, event, field, record, &val, 1) < 0)
                return -1;
 
        if (pevent_get_field_val(s, event, "isa", record, &isa, 0) < 0)
@@ -263,6 +262,16 @@ static int kvm_exit_handler(struct trace_seq *s, struct pevent_record *record,
                trace_seq_printf(s, "reason %s", reason);
        else
                trace_seq_printf(s, "reason UNKNOWN (%llu)", val);
+       return 0;
+}
+
+static int kvm_exit_handler(struct trace_seq *s, struct pevent_record *record,
+                           struct event_format *event, void *context)
+{
+       unsigned long long info1 = 0, info2 = 0;
+
+       if (print_exit_reason(s, record, event, "exit_reason") < 0)
+               return -1;
 
        pevent_print_num_field(s, " rip 0x%lx", event, "guest_rip", record, 1);