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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ref_tracker.h (1875B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2#ifndef _LINUX_REF_TRACKER_H
      3#define _LINUX_REF_TRACKER_H
      4#include <linux/refcount.h>
      5#include <linux/types.h>
      6#include <linux/spinlock.h>
      7#include <linux/stackdepot.h>
      8
      9struct ref_tracker;
     10
     11struct ref_tracker_dir {
     12#ifdef CONFIG_REF_TRACKER
     13	spinlock_t		lock;
     14	unsigned int		quarantine_avail;
     15	refcount_t		untracked;
     16	refcount_t		no_tracker;
     17	bool			dead;
     18	struct list_head	list; /* List of active trackers */
     19	struct list_head	quarantine; /* List of dead trackers */
     20#endif
     21};
     22
     23#ifdef CONFIG_REF_TRACKER
     24static inline void ref_tracker_dir_init(struct ref_tracker_dir *dir,
     25					unsigned int quarantine_count)
     26{
     27	INIT_LIST_HEAD(&dir->list);
     28	INIT_LIST_HEAD(&dir->quarantine);
     29	spin_lock_init(&dir->lock);
     30	dir->quarantine_avail = quarantine_count;
     31	dir->dead = false;
     32	refcount_set(&dir->untracked, 1);
     33	refcount_set(&dir->no_tracker, 1);
     34	stack_depot_init();
     35}
     36
     37void ref_tracker_dir_exit(struct ref_tracker_dir *dir);
     38
     39void ref_tracker_dir_print(struct ref_tracker_dir *dir,
     40			   unsigned int display_limit);
     41
     42int ref_tracker_alloc(struct ref_tracker_dir *dir,
     43		      struct ref_tracker **trackerp, gfp_t gfp);
     44
     45int ref_tracker_free(struct ref_tracker_dir *dir,
     46		     struct ref_tracker **trackerp);
     47
     48#else /* CONFIG_REF_TRACKER */
     49
     50static inline void ref_tracker_dir_init(struct ref_tracker_dir *dir,
     51					unsigned int quarantine_count)
     52{
     53}
     54
     55static inline void ref_tracker_dir_exit(struct ref_tracker_dir *dir)
     56{
     57}
     58
     59static inline void ref_tracker_dir_print(struct ref_tracker_dir *dir,
     60					 unsigned int display_limit)
     61{
     62}
     63
     64static inline int ref_tracker_alloc(struct ref_tracker_dir *dir,
     65				    struct ref_tracker **trackerp,
     66				    gfp_t gfp)
     67{
     68	return 0;
     69}
     70
     71static inline int ref_tracker_free(struct ref_tracker_dir *dir,
     72				   struct ref_tracker **trackerp)
     73{
     74	return 0;
     75}
     76
     77#endif
     78
     79#endif /* _LINUX_REF_TRACKER_H */