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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mmu_context.h (1654B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef __ASM_GENERIC_MMU_CONTEXT_H
      3#define __ASM_GENERIC_MMU_CONTEXT_H
      4
      5/*
      6 * Generic hooks to implement no-op functionality.
      7 */
      8
      9struct task_struct;
     10struct mm_struct;
     11
     12/*
     13 * enter_lazy_tlb - Called when "tsk" is about to enter lazy TLB mode.
     14 *
     15 * @mm:  the currently active mm context which is becoming lazy
     16 * @tsk: task which is entering lazy tlb
     17 *
     18 * tsk->mm will be NULL
     19 */
     20#ifndef enter_lazy_tlb
     21static inline void enter_lazy_tlb(struct mm_struct *mm,
     22			struct task_struct *tsk)
     23{
     24}
     25#endif
     26
     27/**
     28 * init_new_context - Initialize context of a new mm_struct.
     29 * @tsk: task struct for the mm
     30 * @mm:  the new mm struct
     31 * @return: 0 on success, -errno on failure
     32 */
     33#ifndef init_new_context
     34static inline int init_new_context(struct task_struct *tsk,
     35			struct mm_struct *mm)
     36{
     37	return 0;
     38}
     39#endif
     40
     41/**
     42 * destroy_context - Undo init_new_context when the mm is going away
     43 * @mm: old mm struct
     44 */
     45#ifndef destroy_context
     46static inline void destroy_context(struct mm_struct *mm)
     47{
     48}
     49#endif
     50
     51/**
     52 * activate_mm - called after exec switches the current task to a new mm, to switch to it
     53 * @prev_mm: previous mm of this task
     54 * @next_mm: new mm
     55 */
     56#ifndef activate_mm
     57static inline void activate_mm(struct mm_struct *prev_mm,
     58			       struct mm_struct *next_mm)
     59{
     60	switch_mm(prev_mm, next_mm, current);
     61}
     62#endif
     63
     64/**
     65 * dectivate_mm - called when an mm is released after exit or exec switches away from it
     66 * @tsk: the task
     67 * @mm:  the old mm
     68 */
     69#ifndef deactivate_mm
     70static inline void deactivate_mm(struct task_struct *tsk,
     71			struct mm_struct *mm)
     72{
     73}
     74#endif
     75
     76#endif /* __ASM_GENERIC_MMU_CONTEXT_H */