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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lock_events.h (1715B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/*
      3 * This program is free software; you can redistribute it and/or modify
      4 * it under the terms of the GNU General Public License as published by
      5 * the Free Software Foundation; either version 2 of the License, or
      6 * (at your option) any later version.
      7 *
      8 * This program is distributed in the hope that it will be useful,
      9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
     10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     11 * GNU General Public License for more details.
     12 *
     13 * Authors: Waiman Long <longman@redhat.com>
     14 */
     15
     16#ifndef __LOCKING_LOCK_EVENTS_H
     17#define __LOCKING_LOCK_EVENTS_H
     18
     19enum lock_events {
     20
     21#include "lock_events_list.h"
     22
     23	lockevent_num,	/* Total number of lock event counts */
     24	LOCKEVENT_reset_cnts = lockevent_num,
     25};
     26
     27#ifdef CONFIG_LOCK_EVENT_COUNTS
     28/*
     29 * Per-cpu counters
     30 */
     31DECLARE_PER_CPU(unsigned long, lockevents[lockevent_num]);
     32
     33/*
     34 * Increment the statistical counters. use raw_cpu_inc() because of lower
     35 * overhead and we don't care if we loose the occasional update.
     36 */
     37static inline void __lockevent_inc(enum lock_events event, bool cond)
     38{
     39	if (cond)
     40		raw_cpu_inc(lockevents[event]);
     41}
     42
     43#define lockevent_inc(ev)	  __lockevent_inc(LOCKEVENT_ ##ev, true)
     44#define lockevent_cond_inc(ev, c) __lockevent_inc(LOCKEVENT_ ##ev, c)
     45
     46static inline void __lockevent_add(enum lock_events event, int inc)
     47{
     48	raw_cpu_add(lockevents[event], inc);
     49}
     50
     51#define lockevent_add(ev, c)	__lockevent_add(LOCKEVENT_ ##ev, c)
     52
     53#else  /* CONFIG_LOCK_EVENT_COUNTS */
     54
     55#define lockevent_inc(ev)
     56#define lockevent_add(ev, c)
     57#define lockevent_cond_inc(ev, c)
     58
     59#endif /* CONFIG_LOCK_EVENT_COUNTS */
     60#endif /* __LOCKING_LOCK_EVENTS_H */