1/* SPDX-License-Identifier: GPL-2.0 */
 2/* 
 3 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
 
 4 */
 5
 6#ifndef __UM_MMU_CONTEXT_H
 7#define __UM_MMU_CONTEXT_H
 8
 9#include <linux/sched.h>
10#include <linux/mm_types.h>
11#include <linux/mmap_lock.h>
12
13#include <asm/mm_hooks.h>
14#include <asm/mmu.h>
15
 
 
 
 
 
16extern void force_flush_all(void);
17
18#define activate_mm activate_mm
19static inline void activate_mm(struct mm_struct *old, struct mm_struct *new)
20{
21	/*
22	 * This is called by fs/exec.c and sys_unshare()
23	 * when the new ->mm is used for the first time.
24	 */
25	__switch_mm(&new->context.id);
 
 
 
26}
27
28static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, 
29			     struct task_struct *tsk)
30{
31	unsigned cpu = smp_processor_id();
32
33	if(prev != next){
34		cpumask_clear_cpu(cpu, mm_cpumask(prev));
35		cpumask_set_cpu(cpu, mm_cpumask(next));
36		if(next != &init_mm)
37			__switch_mm(&next->context.id);
38	}
39}
40
41#define init_new_context init_new_context
 
 
 
 
 
 
 
 
 
42extern int init_new_context(struct task_struct *task, struct mm_struct *mm);
43
44#define destroy_context destroy_context
45extern void destroy_context(struct mm_struct *mm);
46
47#include <asm-generic/mmu_context.h>
48
49#endif

 
 1/* 
 2 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
 3 * Licensed under the GPL
 4 */
 5
 6#ifndef __UM_MMU_CONTEXT_H
 7#define __UM_MMU_CONTEXT_H
 8
 9#include <linux/sched.h>
 
 
 
 
10#include <asm/mmu.h>
11
12extern void uml_setup_stubs(struct mm_struct *mm);
13extern void arch_exit_mmap(struct mm_struct *mm);
14
15#define deactivate_mm(tsk,mm)	do { } while (0)
16
17extern void force_flush_all(void);
18
 
19static inline void activate_mm(struct mm_struct *old, struct mm_struct *new)
20{
21	/*
22	 * This is called by fs/exec.c and sys_unshare()
23	 * when the new ->mm is used for the first time.
24	 */
25	__switch_mm(&new->context.id);
26	down_write(&new->mmap_sem);
27	uml_setup_stubs(new);
28	up_write(&new->mmap_sem);
29}
30
31static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, 
32			     struct task_struct *tsk)
33{
34	unsigned cpu = smp_processor_id();
35
36	if(prev != next){
37		cpumask_clear_cpu(cpu, mm_cpumask(prev));
38		cpumask_set_cpu(cpu, mm_cpumask(next));
39		if(next != &init_mm)
40			__switch_mm(&next->context.id);
41	}
42}
43
44static inline void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm)
45{
46	uml_setup_stubs(mm);
47}
48
49static inline void enter_lazy_tlb(struct mm_struct *mm, 
50				  struct task_struct *tsk)
51{
52}
53
54extern int init_new_context(struct task_struct *task, struct mm_struct *mm);
55
 
56extern void destroy_context(struct mm_struct *mm);
 
 
57
58#endif