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// SPDX-License-Identifier: LGPL-2.1
/*
* Copyright (C) 2015 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "event-parse.h"
enum tlb_flush_reason {
TLB_FLUSH_ON_TASK_SWITCH,
TLB_REMOTE_SHOOTDOWN,
TLB_LOCAL_SHOOTDOWN,
TLB_LOCAL_MM_SHOOTDOWN,
NR_TLB_FLUSH_REASONS,
};
static int tlb_flush_handler(struct trace_seq *s, struct tep_record *record,
struct tep_event *event, void *context)
{
unsigned long long val;
trace_seq_printf(s, "pages=");
tep_print_num_field(s, "%ld", event, "pages", record, 1);
if (tep_get_field_val(s, event, "reason", record, &val, 1) < 0)
return -1;
trace_seq_puts(s, " reason=");
switch (val) {
case TLB_FLUSH_ON_TASK_SWITCH:
trace_seq_puts(s, "flush on task switch");
break;
case TLB_REMOTE_SHOOTDOWN:
trace_seq_puts(s, "remote shootdown");
break;
case TLB_LOCAL_SHOOTDOWN:
trace_seq_puts(s, "local shootdown");
break;
case TLB_LOCAL_MM_SHOOTDOWN:
trace_seq_puts(s, "local mm shootdown");
break;
}
trace_seq_printf(s, " (%lld)", val);
return 0;
}
int TEP_PLUGIN_LOADER(struct tep_handle *tep)
{
tep_register_event_handler(tep, -1, "tlb", "tlb_flush",
tlb_flush_handler, NULL);
return 0;
}
void TEP_PLUGIN_UNLOADER(struct tep_handle *tep)
{
tep_unregister_event_handler(tep, -1,
"tlb", "tlb_flush",
tlb_flush_handler, NULL);
}
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