1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
6 #ifndef __UM_MMU_CONTEXT_H
7 #define __UM_MMU_CONTEXT_H
9 #include <linux/sched.h>
10 #include <linux/mm_types.h>
14 extern void uml_setup_stubs(struct mm_struct *mm);
16 * Needed since we do not use the asm-generic/mm_hooks.h:
18 static inline int arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm)
23 extern void arch_exit_mmap(struct mm_struct *mm);
24 static inline void arch_unmap(struct mm_struct *mm,
25 unsigned long start, unsigned long end)
28 static inline void arch_bprm_mm_init(struct mm_struct *mm,
29 struct vm_area_struct *vma)
33 static inline bool arch_vma_access_permitted(struct vm_area_struct *vma,
34 bool write, bool execute, bool foreign)
36 /* by default, allow everything */
41 * end asm-generic/mm_hooks.h functions
44 #define deactivate_mm(tsk,mm) do { } while (0)
46 extern void force_flush_all(void);
48 static inline void activate_mm(struct mm_struct *old, struct mm_struct *new)
51 * This is called by fs/exec.c and sys_unshare()
52 * when the new ->mm is used for the first time.
54 __switch_mm(&new->context.id);
55 down_write_nested(&new->mmap_sem, 1);
57 up_write(&new->mmap_sem);
60 static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
61 struct task_struct *tsk)
63 unsigned cpu = smp_processor_id();
66 cpumask_clear_cpu(cpu, mm_cpumask(prev));
67 cpumask_set_cpu(cpu, mm_cpumask(next));
69 __switch_mm(&next->context.id);
73 static inline void enter_lazy_tlb(struct mm_struct *mm,
74 struct task_struct *tsk)
78 extern int init_new_context(struct task_struct *task, struct mm_struct *mm);
80 extern void destroy_context(struct mm_struct *mm);