cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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plugin_tlb.c (1412B)

      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
     11enum 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
     19static 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
     53int 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
     61void 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}