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[linux.git] / tools / lib / traceevent / plugins / plugin_tlb.c
1 // SPDX-License-Identifier: LGPL-2.1
2 /*
3  * Copyright (C) 2015 Red Hat Inc, Steven Rostedt <[email protected]>
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
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
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
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 }
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