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_jbd2.c (1461B)

      1// SPDX-License-Identifier: LGPL-2.1
      2/*
      3 * Copyright (C) 2010 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#include "trace-seq.h"
     11
     12#define MINORBITS	20
     13#define MINORMASK	((1U << MINORBITS) - 1)
     14
     15#define MAJOR(dev)	((unsigned int) ((dev) >> MINORBITS))
     16#define MINOR(dev)	((unsigned int) ((dev) & MINORMASK))
     17
     18static unsigned long long
     19process_jbd2_dev_to_name(struct trace_seq *s, unsigned long long *args)
     20{
     21	unsigned int dev = args[0];
     22
     23	trace_seq_printf(s, "%d:%d", MAJOR(dev), MINOR(dev));
     24	return 0;
     25}
     26
     27static unsigned long long
     28process_jiffies_to_msecs(struct trace_seq *s, unsigned long long *args)
     29{
     30	unsigned long long jiffies = args[0];
     31
     32	trace_seq_printf(s, "%lld", jiffies);
     33	return jiffies;
     34}
     35
     36int TEP_PLUGIN_LOADER(struct tep_handle *tep)
     37{
     38	tep_register_print_function(tep,
     39				    process_jbd2_dev_to_name,
     40				    TEP_FUNC_ARG_STRING,
     41				    "jbd2_dev_to_name",
     42				    TEP_FUNC_ARG_INT,
     43				    TEP_FUNC_ARG_VOID);
     44
     45	tep_register_print_function(tep,
     46				    process_jiffies_to_msecs,
     47				    TEP_FUNC_ARG_LONG,
     48				    "jiffies_to_msecs",
     49				    TEP_FUNC_ARG_LONG,
     50				    TEP_FUNC_ARG_VOID);
     51	return 0;
     52}
     53
     54void TEP_PLUGIN_UNLOADER(struct tep_handle *tep)
     55{
     56	tep_unregister_print_function(tep, process_jbd2_dev_to_name,
     57				      "jbd2_dev_to_name");
     58
     59	tep_unregister_print_function(tep, process_jiffies_to_msecs,
     60				      "jiffies_to_msecs");
     61}