1 // SPDX-License-Identifier: LGPL-2.1
2 /*
3 * Copyright (C) 2015 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
4 */
5 #include <stdio.h>
6 #include <stdlib.h>
7 #include <string.h>
8
9 #include "event-parse.h"
10
11 enum tlb_flush_reason {
12 TLB_FLUSH_ON_TASK_SWITCH,
13 TLB_REMOTE_SHOOTDOWN,
14 TLB_LOCAL_SHOOTDOWN,
15 TLB_LOCAL_MM_SHOOTDOWN,
16 NR_TLB_FLUSH_REASONS,
17 };
18
tlb_flush_handler(struct trace_seq * s,struct tep_record * record,struct tep_event * event,void * context)19 static int tlb_flush_handler(struct trace_seq *s, struct tep_record *record,
20 struct tep_event *event, void *context)
21 {
22 unsigned long long val;
23
24 trace_seq_printf(s, "pages=");
25
26 tep_print_num_field(s, "%ld", event, "pages", record, 1);
27
28 if (tep_get_field_val(s, event, "reason", record, &val, 1) < 0)
29 return -1;
30
31 trace_seq_puts(s, " reason=");
32
33 switch (val) {
34 case TLB_FLUSH_ON_TASK_SWITCH:
35 trace_seq_puts(s, "flush on task switch");
36 break;
37 case TLB_REMOTE_SHOOTDOWN:
38 trace_seq_puts(s, "remote shootdown");
39 break;
40 case TLB_LOCAL_SHOOTDOWN:
41 trace_seq_puts(s, "local shootdown");
42 break;
43 case TLB_LOCAL_MM_SHOOTDOWN:
44 trace_seq_puts(s, "local mm shootdown");
45 break;
46 }
47
48 trace_seq_printf(s, " (%lld)", val);
49
50 return 0;
51 }
52
TEP_PLUGIN_LOADER(struct tep_handle * tep)53 int TEP_PLUGIN_LOADER(struct tep_handle *tep)
54 {
55 tep_register_event_handler(tep, -1, "tlb", "tlb_flush",
56 tlb_flush_handler, NULL);
57
58 return 0;
59 }
60
TEP_PLUGIN_UNLOADER(struct tep_handle * tep)61 void TEP_PLUGIN_UNLOADER(struct tep_handle *tep)
62 {
63 tep_unregister_event_handler(tep, -1,
64 "tlb", "tlb_flush",
65 tlb_flush_handler, NULL);
66 }
67