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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swap_slots.h (842B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef _LINUX_SWAP_SLOTS_H
      3#define _LINUX_SWAP_SLOTS_H
      4
      5#include <linux/swap.h>
      6#include <linux/spinlock.h>
      7#include <linux/mutex.h>
      8
      9#define SWAP_SLOTS_CACHE_SIZE			SWAP_BATCH
     10#define THRESHOLD_ACTIVATE_SWAP_SLOTS_CACHE	(5*SWAP_SLOTS_CACHE_SIZE)
     11#define THRESHOLD_DEACTIVATE_SWAP_SLOTS_CACHE	(2*SWAP_SLOTS_CACHE_SIZE)
     12
     13struct swap_slots_cache {
     14	bool		lock_initialized;
     15	struct mutex	alloc_lock; /* protects slots, nr, cur */
     16	swp_entry_t	*slots;
     17	int		nr;
     18	int		cur;
     19	spinlock_t	free_lock;  /* protects slots_ret, n_ret */
     20	swp_entry_t	*slots_ret;
     21	int		n_ret;
     22};
     23
     24void disable_swap_slots_cache_lock(void);
     25void reenable_swap_slots_cache_unlock(void);
     26void enable_swap_slots_cache(void);
     27void free_swap_slot(swp_entry_t entry);
     28
     29extern bool swap_slot_cache_enabled;
     30
     31#endif /* _LINUX_SWAP_SLOTS_H */