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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ctcm_dbug.c (1921B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 *	Copyright IBM Corp. 2001, 2007
      4 *	Authors:	Peter Tiedemann (ptiedem@de.ibm.com)
      5 *
      6 */
      7
      8#include <linux/stddef.h>
      9#include <linux/string.h>
     10#include <linux/kernel.h>
     11#include <linux/errno.h>
     12#include <linux/ctype.h>
     13#include <linux/sysctl.h>
     14#include <linux/module.h>
     15#include <linux/init.h>
     16#include <linux/fs.h>
     17#include <linux/debugfs.h>
     18#include "ctcm_dbug.h"
     19
     20/*
     21 * Debug Facility Stuff
     22 */
     23
     24struct ctcm_dbf_info ctcm_dbf[CTCM_DBF_INFOS] = {
     25	[CTCM_DBF_SETUP]     = {"ctc_setup", 8, 1, 64, CTC_DBF_INFO, NULL},
     26	[CTCM_DBF_ERROR]     = {"ctc_error", 8, 1, 64, CTC_DBF_ERROR, NULL},
     27	[CTCM_DBF_TRACE]     = {"ctc_trace", 8, 1, 64, CTC_DBF_ERROR, NULL},
     28	[CTCM_DBF_MPC_SETUP] = {"mpc_setup", 8, 1, 80, CTC_DBF_INFO, NULL},
     29	[CTCM_DBF_MPC_ERROR] = {"mpc_error", 8, 1, 80, CTC_DBF_ERROR, NULL},
     30	[CTCM_DBF_MPC_TRACE] = {"mpc_trace", 8, 1, 80, CTC_DBF_ERROR, NULL},
     31};
     32
     33void ctcm_unregister_dbf_views(void)
     34{
     35	int x;
     36	for (x = 0; x < CTCM_DBF_INFOS; x++) {
     37		debug_unregister(ctcm_dbf[x].id);
     38		ctcm_dbf[x].id = NULL;
     39	}
     40}
     41
     42int ctcm_register_dbf_views(void)
     43{
     44	int x;
     45	for (x = 0; x < CTCM_DBF_INFOS; x++) {
     46		/* register the areas */
     47		ctcm_dbf[x].id = debug_register(ctcm_dbf[x].name,
     48						ctcm_dbf[x].pages,
     49						ctcm_dbf[x].areas,
     50						ctcm_dbf[x].len);
     51		if (ctcm_dbf[x].id == NULL) {
     52			ctcm_unregister_dbf_views();
     53			return -ENOMEM;
     54		}
     55
     56		/* register a view */
     57		debug_register_view(ctcm_dbf[x].id, &debug_hex_ascii_view);
     58		/* set a passing level */
     59		debug_set_level(ctcm_dbf[x].id, ctcm_dbf[x].level);
     60	}
     61
     62	return 0;
     63}
     64
     65void ctcm_dbf_longtext(enum ctcm_dbf_names dbf_nix, int level, char *fmt, ...)
     66{
     67	char dbf_txt_buf[64];
     68	va_list args;
     69
     70	if (!debug_level_enabled(ctcm_dbf[dbf_nix].id, level))
     71		return;
     72	va_start(args, fmt);
     73	vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
     74	va_end(args);
     75
     76	debug_text_event(ctcm_dbf[dbf_nix].id, level, dbf_txt_buf);
     77}
     78